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Ester/Amine Spring Broadleaf Herbicide Timer - Purdue (GDD 50)
through Sat, Dec. 8. 2018

 
  

Ann Arbor, MI

       

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2017 & 2018

2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 33° 56° 58 21 2 0 0
02-20 53° 61° 93 46 17 7 2
02-21 32° 54° 114 57 18 7 2
02-22 30° 40° 127 60 18 7 2
02-23 34° 48° 146 69 18 7 2
02-24 36° 39° 161 74 18 7 2
02-25 36° 48° 181 84 18 7 2
02-26 29° 51° 199 92 18 7 2
02-27 34° 59° 223 107 22 7 2
02-28 40° 59° 251 124 30 7 2
03-01 32° 41° 266 129 30 7 2
03-02 27° 38° 277 130 30 7 2
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 25° 40° 287 130 30 7 2
03-04 21° 41° 296 130 30 7 2
03-05 22° 37° 304 130 30 7 2
03-06 30° 41° 317 133 30 7 2
03-07 25° 33° 324 133 30 7 2
03-08 21° 31° 328 133 30 7 2
03-09 25° 32° 334 133 30 7 2
03-10 18° 35° 339 133 30 7 2
03-11 17° 38° 345 133 30 7 2
03-12 20° 34° 350 133 30 7 2
03-13 25° 34° 357 133 30 7 2
03-14 20° 38° 365 133 30 7 2
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 25° 36° 373 133 30 7 2
03-16 20° 37° 379 133 30 7 2
03-17 22° 47° 392 136 30 7 2
03-18 24° 58° 411 145 30 7 2
03-19 27° 44° 424 149 30 7 2
03-20 24° 43° 436 150 30 7 2
03-21 28° 40° 448 152 30 7 2
03-22 24° 44° 460 154 30 7 2
03-23 26° 42° 472 156 30 7 2
03-24 23° 42° 483 157 30 7 2
03-25 21° 39° 491 157 30 7 2
03-26 29° 49° 508 164 30 7 2
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 41° 53° 533 179 35 7 2
03-28 40° 46° 554 190 36 7 2
03-29 40° 45° 574 200 36 7 2
03-30 31° 44° 590 206 36 7 2
03-31 30° 49° 608 214 36 7 2
04-01 28° 40° 619 215 36 7 2
04-02 21° 41° 628 215 36 7 2
04-03 33° 39° 642 219 36 7 2
04-04 26° 38° 652 219 36 7 2
04-05 25° 41° 664 221 36 7 2
04-06 28° 41° 676 223 36 7 2
04-07 20° 36° 682 223 36 7 2
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 19° 39° 689 223 36 7 2
04-09 31° 37° 701 225 36 7 2
04-10 28° 44° 714 229 36 7 2
04-11 33° 57° 737 242 39 7 2
04-12 41° 74° 773 267 55 14 4
04-13 39° 62° 801 285 63 15 4
04-14 33° 45° 818 293 63 15 4
04-15 30° 38° 830 294 63 15 4
04-16 31° 37° 842 297 63 15 4
04-17 28° 36° 852 297 63 15 4
04-18 31° 45° 868 303 63 15 4
04-19 33° 54° 890 315 64 15 4
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 29° 57° 911 326 65 15 4
04-21 30° 56° 932 337 66 15 4
04-22 32° 62° 957 352 71 15 4
04-23 41° 71° 991 376 85 21 5
04-24 51° 56° 1023 397 97 24 5
04-25 45° 61° 1054 418 108 27 5
04-26 33° 63° 1080 435 114 27 5
04-27 39° 66° 1110 455 125 30 5
04-28 38° 52° 1133 468 128 30 5
04-29 31° 58° 1156 480 130 30 5
04-30 34° 71° 1187 501 141 33 5
05-01 53° 83° 1233 537 167 51 19
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 61° 82° 1283 577 197 73 36
05-03 62° 71° 1327 612 222 89 47
05-04 56° 71° 1369 643 243 103 56
05-05 52° 76° 1411 676 265 117 65
05-06 54° 76° 1454 709 289 132 75
05-07 44° 69° 1489 733 303 139 77
05-08 45° 77° 1527 762 322 149 82
05-09 51° 81° 1571 796 345 165 93
05-10 59° 69° 1613 828 368 179 102
05-11 42° 59° 1642 847 376 180 102
05-12 43° 51° 1667 862 381 180 102
05-13 45° 61° 1698 883 392 183 102
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 52° 75° 1740 914 414 197 111
05-15 60° 72° 1783 948 438 212 121
05-16 50° 78° 1825 980 459 226 130
05-17 52° 81° 1869 1014 484 242 141
05-18 52° 73° 1910 1044 504 255 149
05-19 58° 76° 1955 1079 529 272 161
05-20 58° 64° 1993 1108 548 282 166
05-21 51° 66° 2030 1135 564 291 170
05-22 53° 71° 2070 1165 584 303 177
05-23 51° 79° 2113 1198 607 318 187
05-24 53° 81° 2158 1233 632 335 199
05-25 57° 86° 2207 1272 662 356 215
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 65° 79° 2257 1312 691 378 232
05-27 64° 90° 2312 1357 726 405 254
05-28 65° 92° 2369 1403 763 434 278
05-29 69° 89° 2426 1450 800 463 302
05-30 70° 86° 2481 1496 836 490 324
05-31 73° 87° 2540 1544 874 521 350
06-01 68° 82° 2593 1587 907 546 370
06-02 56° 71° 2634 1619 928 559 378
06-03 61° 75° 2680 1654 954 577 391
06-04 58° 71° 2722 1687 976 591 400
06-05 55° 68° 2762 1716 996 603 407
06-06 46° 71° 2798 1743 1013 611 410
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 59° 81° 2846 1781 1041 631 425
06-08 60° 81° 2895 1819 1069 652 441
06-09 63° 72° 2940 1855 1094 669 453
06-10 61° 66° 2982 1886 1116 683 462
06-11 59° 76° 3027 1922 1142 700 474
06-12 60° 75° 3073 1958 1167 718 487
06-13 66° 83° 3126 2000 1200 743 507
06-14 55° 82° 3172 2037 1227 761 520
06-15 56° 82° 3219 2074 1253 780 534
06-16 67° 84° 3273 2117 1287 806 555
06-17 67° 95° 3331 2166 1325 836 580
06-18 76° 93° 3394 2218 1368 871 610
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 68° 76° 3443 2258 1398 892 626
06-20 59° 70° 3486 2291 1420 907 636
06-21 58° 77° 3531 2326 1446 924 648
06-22 63° 73° 3578 2362 1472 943 662
06-23 64° 76° 3626 2401 1500 963 677
06-24 64° 74° 3673 2437 1527 982 691
06-25 56° 75° 3716 2471 1550 997 701
06-26 54° 78° 3760 2505 1575 1013 712
06-27 67° 75° 3809 2544 1604 1034 728
06-28 64° 86° 3863 2587 1637 1060 749
06-29 65° 89° 3918 2632 1672 1087 771
06-30 73° 92° 3978 2683 1713 1119 798
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 71° 92° 4038 2733 1752 1151 825
07-02 73° 88° 4097 2781 1791 1182 851
07-03 66° 89° 4152 2827 1827 1209 873
07-04 72° 91° 4212 2877 1866 1241 900
07-05 75° 93° 4274 2929 1908 1275 929
07-06 63° 79° 4323 2968 1937 1296 945
07-07 51° 79° 4366 3001 1960 1311 955
07-08 53° 85° 4413 3038 1988 1330 969
07-09 58° 90° 4465 3080 2020 1354 988
07-10 66° 88° 4520 3125 2055 1381 1010
07-11 57° 85° 4569 3164 2083 1402 1026
07-12 58° 83° 4618 3202 2112 1423 1042
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 64° 91° 4673 3248 2147 1450 1064
07-14 70° 85° 4729 3293 2183 1478 1087
07-15 70° 92° 4788 3342 2222 1509 1113
07-16 71° 88° 4846 3390 2260 1539 1138
07-17 62° 81° 4895 3430 2290 1560 1154
07-18 58° 81° 4943 3468 2317 1580 1169
07-19 58° 83° 4991 3506 2346 1600 1184
07-20 64° 80° 5041 3546 2376 1622 1201
07-21 66° 74° 5089 3584 2403 1642 1216
07-22 65° 71° 5135 3620 2429 1660 1229
07-23 61° 78° 5183 3658 2457 1680 1244
07-24 67° 82° 5236 3700 2490 1705 1264
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 66° 87° 5290 3745 2524 1731 1285
07-26 65° 82° 5341 3786 2556 1754 1303
07-27 59° 80° 5389 3823 2583 1774 1318
07-28 57° 79° 5434 3859 2609 1791 1330
07-29 59° 82° 5483 3897 2637 1812 1346
07-30 59° 78° 5529 3934 2664 1830 1359
07-31 61° 77° 5577 3971 2691 1850 1374
08-01 63° 78° 5625 4010 2719 1870 1389
08-02 60° 84° 5675 4050 2749 1892 1406
08-03 64° 85° 5728 4092 2782 1917 1426
08-04 63° 88° 5781 4136 2815 1942 1446
08-05 69° 90° 5839 4183 2853 1972 1471
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-06 69° 85° 5894 4229 2889 1999 1493
08-07 69° 84° 5949 4273 2923 2026 1515
08-08 70° 83° 6003 4318 2957 2052 1536
08-09 63° 84° 6055 4359 2989 2076 1555
08-10 66° 81° 6107 4401 3021 2100 1574
08-11 59° 83° 6156 4440 3050 2121 1590
08-12 64° 82° 6207 4481 3081 2144 1608
08-13 62° 83° 6257 4522 3111 2166 1625
08-14 64° 86° 6310 4565 3144 2191 1645
08-15 67° 86° 6364 4609 3179 2217 1666
08-16 69° 76° 6415 4650 3210 2240 1684
08-17 71° 79° 6468 4693 3243 2265 1704
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-18 68° 83° 6522 4737 3276 2291 1725
08-19 67° 80° 6574 4778 3308 2315 1744
08-20 64° 80° 6623 4818 3338 2336 1760
08-21 68° 81° 6676 4860 3370 2361 1780
08-22 61° 75° 6722 4896 3396 2379 1793
08-23 55° 80° 6767 4932 3422 2396 1805
08-24 56° 76° 6811 4966 3446 2412 1816
08-25 67° 76° 6861 5005 3475 2434 1833
08-26 69° 85° 6916 5051 3510 2461 1855
08-27 72° 88° 6974 5099 3549 2491 1880
08-28 75° 89° 7034 5149 3588 2523 1907
08-29 70° 83° 7088 5193 3623 2549 1928
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-30 58° 76° 7133 5228 3648 2566 1940
08-31 57° 80° 7180 5265 3674 2585 1954
09-01 64° 85° 7233 5308 3707 2610 1974
09-02 70° 88° 7290 5355 3744 2639 1998
09-03 71° 87° 7347 5402 3781 2668 2022
09-04 68° 90° 7404 5448 3818 2697 2046
09-05 72° 90° 7463 5498 3857 2728 2072
09-06 67° 74° 7511 5536 3885 2748 2087
09-07 62° 70° 7555 5570 3909 2764 2098
09-08 58° 65° 7595 5599 3929 2776 2105
09-09 55° 60° 7630 5624 3944 2783 2107
09-10 54° 64° 7667 5652 3961 2792 2111
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-11 57° 74° 7711 5685 3985 2808 2122
09-12 53° 73° 7752 5716 4006 2821 2130
09-13 57° 77° 7797 5751 4031 2838 2142
09-14 66° 81° 7848 5793 4062 2861 2160
09-15 65° 86° 7901 5836 4096 2886 2180
09-16 64° 84° 7953 5878 4128 2910 2199
09-17 64° 87° 8007 5921 4161 2936 2220
09-18 65° 88° 8062 5966 4196 2963 2242
09-19 65° 78° 8111 6006 4225 2984 2258
09-20 63° 79° 8160 6044 4254 3005 2274
09-21 62° 82° 8209 6084 4284 3026 2290
09-22 49° 61° 8242 6107 4297 3031 2290
2018Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-23 44° 70° 8277 6132 4312 3038 2293
09-24 52° 66° 8314 6159 4329 3047 2297
09-25 66° 76° 8363 6198 4357 3068 2312
09-26 51° 70° 8402 6226 4376 3079 2318
09-27 48° 62° 8434 6249 4389 3083 2318
09-28 47° 69° 8470 6275 4405 3091 2321
09-29 42° 62° 8500 6295 4415 3093 2321
09-30 45° 63° 8533 6317 4427 3098 2321
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 39° 64° 101 50 18 2 0
02-20 34° 53° 122 62 20 2 0
02-21 36° 58° 147 77 25 2 0
02-22 41° 61° 176 96 34 3 0
02-23 43° 65° 208 117 46 7 0
02-24 39° 66° 238 138 56 9 0
02-25 24° 51° 254 143 56 9 0
02-26 25° 40° 264 144 56 9 0
02-27 31° 50° 282 152 56 9 0
02-28 36° 57° 307 167 61 9 0
03-01 27° 57° 327 177 61 9 0
03-02 25° 31° 333 177 61 9 0
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 19° 27° 334 177 61 9 0
03-04 16° 31° 336 177 61 9 0
03-05 23° 38° 344 177 61 9 0
03-06 36° 56° 368 191 65 9 0
03-07 38° 57° 394 207 71 9 0
03-08 38° 52° 417 220 73 9 0
03-09 31° 41° 431 224 73 9 0
03-10 18° 34° 435 224 73 9 0
03-11 15° 24° 435 224 73 9 0
03-12 15° 30° 436 224 73 9 0
03-13 19° 24° 436 224 73 9 0
03-14 13° 22° 436 224 73 9 0
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 14° 29° 436 224 73 9 0
03-16 17° 39° 442 224 73 9 0
03-17 24° 36° 450 224 73 9 0
03-18 32° 38° 463 227 73 9 0
03-19 34° 41° 479 233 73 9 0
03-20 34° 45° 496 240 73 9 0
03-21 30° 55° 516 251 74 9 0
03-22 19° 35° 522 251 74 9 0
03-23 21° 42° 531 251 74 9 0
03-24 35° 74° 564 273 86 14 0
03-25 40° 52° 588 287 91 14 0
03-26 39° 50° 610 300 93 14 0
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 49° 59° 642 321 105 18 0
03-28 40° 52° 666 336 109 18 0
03-29 31° 55° 688 347 110 18 0
03-30 37° 42° 705 354 110 18 0
03-31 36° 42° 722 361 110 18 0
04-01 36° 55° 745 374 114 18 0
04-02 32° 59° 769 388 117 18 0
04-03 45° 51° 795 404 123 18 0
04-04 46° 56° 824 423 132 18 0
04-05 38° 47° 844 433 132 18 0
04-06 34° 43° 861 440 132 18 0
04-07 34° 51° 881 450 133 18 0
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 31° 60° 905 464 136 18 0
04-09 45° 75° 943 492 154 28 5
04-10 59° 75° 987 527 179 45 17
04-11 45° 60° 1018 547 190 48 17
04-12 43° 59° 1047 566 199 49 17
04-13 43° 53° 1073 582 205 49 17
04-14 44° 63° 1104 604 216 52 17
04-15 48° 82° 1147 637 239 67 27
04-16 58° 72° 1191 670 262 83 37
04-17 44° 68° 1225 694 277 89 39
04-18 37° 66° 1255 714 287 91 39
04-19 50° 74° 1295 744 307 103 46
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 48° 62° 1327 767 319 107 46
04-21 45° 55° 1355 784 327 107 46
04-22 37° 61° 1382 801 334 107 46
04-23 34° 68° 1411 820 343 108 46
04-24 40° 69° 1444 843 356 113 46
04-25 49° 69° 1481 870 373 122 50
04-26 55° 83° 1528 907 400 141 64
04-27 50° 70° 1566 935 418 151 69
04-28 43° 63° 1597 956 429 154 69
04-29 46° 54° 1625 974 437 154 69
04-30 40° 56° 1651 990 443 154 69
05-01 49° 65° 1686 1015 458 162 71
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 43° 49° 1710 1029 462 162 71
05-03 38° 60° 1737 1046 469 162 71
05-04 43° 48° 1761 1060 473 162 71
05-05 42° 48° 1784 1073 476 162 71
05-06 40° 58° 1811 1090 483 162 71
05-07 36° 54° 1834 1104 486 162 71
05-08 32° 57° 1857 1116 489 162 71
05-09 33° 62° 1882 1132 494 162 71
05-10 43° 65° 1914 1153 506 166 71
05-11 46° 65° 1947 1177 519 171 71
05-12 42° 67° 1980 1199 532 175 71
05-13 44° 71° 2015 1225 547 183 74
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 51° 67° 2053 1252 565 192 78
05-15 41° 70° 2086 1275 578 197 78
05-16 53° 74° 2127 1307 599 211 87
05-17 67° 85° 2181 1350 633 236 108
05-18 68° 86° 2236 1395 668 263 129
05-19 47° 63° 2269 1418 681 268 129
05-20 47° 64° 2302 1442 694 274 130
05-21 52° 74° 2344 1473 716 287 138
05-22 50° 68° 2381 1500 733 296 143
05-23 56° 72° 2423 1532 755 310 151
05-24 56° 64° 2461 1560 773 320 156
05-25 58° 61° 2498 1587 790 329 161
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 55° 69° 2538 1617 810 341 168
05-27 57° 73° 2581 1650 833 356 178
05-28 58° 76° 2626 1685 858 373 189
05-29 55° 78° 2670 1719 882 389 201
05-30 52° 70° 2709 1748 901 400 207
05-31 52° 72° 2749 1778 921 412 213
06-01 52° 73° 2789 1808 941 425 221
06-02 52° 79° 2833 1842 965 440 231
06-03 52° 77° 2875 1874 987 455 241
06-04 64° 86° 2928 1918 1020 480 261
06-05 60° 69° 2971 1950 1043 494 271
06-06 52° 67° 3009 1978 1061 504 275
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 52° 74° 3049 2009 1081 517 283
06-08 48° 76° 3090 2039 1102 529 290
06-09 54° 80° 3134 2074 1126 546 302
06-10 59° 86° 3185 2114 1157 568 320
06-11 68° 89° 3241 2160 1193 597 343
06-12 67° 91° 3298 2207 1230 625 367
06-13 71° 89° 3357 2256 1268 656 392
06-14 67° 81° 3409 2298 1301 680 412
06-15 68° 85° 3463 2342 1335 706 433
06-16 63° 85° 3515 2385 1367 731 452
06-17 65° 87° 3569 2429 1401 757 473
06-18 68° 84° 3623 2472 1435 783 494
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 59° 75° 3668 2507 1460 800 506
06-20 56° 73° 3711 2540 1483 814 515
06-21 54° 76° 3754 2573 1506 829 525
06-22 61° 85° 3805 2614 1537 852 543
06-23 65° 78° 3854 2654 1566 874 560
06-24 61° 77° 3901 2690 1593 893 574
06-25 54° 68° 3941 2720 1613 904 580
06-26 52° 70° 3980 2749 1632 915 586
06-27 51° 72° 4019 2778 1651 926 593
06-28 50° 76° 4060 2809 1672 939 601
06-29 67° 86° 4115 2854 1707 966 622
06-30 67° 83° 4168 2897 1740 991 643
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 67° 83° 4221 2940 1773 1016 663
07-02 61° 83° 4271 2980 1803 1038 680
07-03 64° 80° 4321 3020 1833 1060 697
07-04 58° 81° 4369 3058 1861 1080 711
07-05 56° 83° 4416 3095 1888 1099 726
07-06 60° 86° 4467 3136 1919 1122 744
07-07 66° 84° 4520 3179 1952 1147 764
07-08 63° 76° 4567 3217 1979 1167 778
07-09 54° 80° 4613 3252 2005 1184 790
07-10 65° 75° 4661 3290 2032 1204 805
07-11 67° 86° 4715 3334 2067 1230 826
07-12 72° 83° 4770 3379 2102 1257 849
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 71° 81° 4824 3424 2136 1284 870
07-14 66° 78° 4874 3464 2166 1306 887
07-15 59° 79° 4921 3501 2193 1325 901
07-16 61° 78° 4969 3538 2221 1344 916
07-17 56° 79° 5015 3574 2247 1362 928
07-18 60° 85° 5065 3615 2277 1385 946
07-19 66° 88° 5121 3660 2312 1412 968
07-20 71° 84° 5176 3705 2348 1439 991
07-21 68° 86° 5231 3750 2383 1467 1013
07-22 72° 84° 5287 3797 2419 1495 1036
07-23 68° 82° 5340 3839 2452 1520 1056
07-24 60° 73° 5385 3874 2477 1536 1067
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 52° 79° 5428 3907 2500 1552 1078
07-26 59° 80° 5476 3945 2528 1571 1092
07-27 66° 86° 5530 3989 2562 1597 1113
07-28 61° 79° 5578 4027 2589 1617 1128
07-29 56° 82° 5624 4064 2616 1636 1142
07-30 57° 84° 5673 4102 2645 1656 1157
07-31 59° 86° 5723 4142 2675 1678 1175
08-01 60° 85° 5774 4183 2706 1701 1192
08-02 63° 85° 5826 4225 2738 1725 1211
08-03 63° 85° 5878 4267 2770 1749 1231
08-04 60° 72° 5922 4302 2794 1766 1242
08-05 54° 76° 5965 4334 2817 1781 1252
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-06 55° 76° 6009 4368 2841 1796 1263
08-07 56° 77° 6054 4403 2865 1813 1274
08-08 53° 81° 6099 4438 2891 1830 1286
08-09 57° 82° 6146 4475 2918 1849 1301
08-10 58° 83° 6195 4514 2947 1870 1316
08-11 64° 83° 6247 4556 2978 1894 1335
08-12 60° 76° 6292 4592 3004 1912 1348
08-13 55° 79° 6338 4627 3029 1929 1360
08-14 59° 82° 6386 4665 3058 1949 1375
08-15 62° 81° 6436 4705 3088 1971 1392
08-16 62° 83° 6486 4745 3118 1993 1410
08-17 70° 82° 6540 4789 3152 2019 1430
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-18 66° 77° 6589 4828 3181 2040 1447
08-19 61° 79° 6637 4867 3209 2061 1462
08-20 57° 83° 6685 4905 3237 2081 1477
08-21 68° 86° 6740 4949 3272 2107 1499
08-22 64° 78° 6789 4988 3301 2128 1515
08-23 56° 74° 6832 5021 3324 2143 1525
08-24 51° 68° 6870 5049 3342 2153 1529
08-25 48° 71° 6907 5076 3359 2162 1534
08-26 48° 74° 6946 5106 3378 2174 1540
08-27 55° 76° 6990 5139 3402 2189 1550
08-28 59° 69° 7032 5171 3424 2203 1560
08-29 62° 70° 7076 5206 3448 2220 1571
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-30 59° 79° 7124 5243 3475 2239 1585
08-31 56° 71° 7165 5274 3497 2252 1593
09-01 49° 65° 7200 5299 3512 2259 1595
09-02 49° 71° 7238 5327 3530 2269 1601
09-03 56° 77° 7282 5362 3554 2286 1612
09-04 58° 83° 7331 5400 3583 2306 1628
09-05 55° 68° 7371 5430 3602 2318 1634
09-06 45° 65° 7404 5453 3615 2323 1634
09-07 47° 64° 7437 5476 3629 2328 1635
09-08 49° 66° 7473 5502 3645 2336 1637
09-09 41° 65° 7504 5523 3656 2339 1637
09-10 41° 67° 7536 5545 3668 2343 1637
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-11 46° 73° 7574 5573 3685 2353 1642
09-12 48° 76° 7614 5603 3706 2365 1649
09-13 55° 72° 7655 5634 3727 2378 1657
09-14 56° 74° 7698 5667 3750 2394 1668
09-15 58° 77° 7744 5703 3776 2411 1680
09-16 59° 80° 7791 5741 3803 2431 1695
09-17 60° 84° 7842 5781 3833 2453 1712
09-18 65° 73° 7889 5818 3861 2472 1726
09-19 63° 71° 7933 5853 3885 2489 1738
09-20 66° 83° 7986 5895 3918 2513 1757
09-21 65° 90° 8042 5941 3954 2541 1780
09-22 67° 91° 8099 5988 3991 2570 1804
2017Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-23 63° 92° 8154 6034 4026 2598 1827
09-24 62° 90° 8208 6077 4060 2624 1848
09-25 64° 90° 8263 6122 4095 2651 1870
09-26 64° 91° 8319 6168 4131 2678 1892
09-27 61° 78° 8367 6206 4159 2698 1907
09-28 47° 66° 8401 6230 4173 2705 1909
09-29 50° 67° 8438 6257 4189 2713 1912
09-30 44° 65° 8470 6279 4202 2717 1912

 

Latest Updates

March 9th, 2018Note Regarding 2018 Alerts

We had an issue with the emailed alerts that should be resolved now, and apologize for any inconvenience. You may receive outdated alerts tomorrow (Saturday, March 10, 2018), so please check the details before taking any action. Thank you.


 

February 17th, 2018Welcome to a New GDD Season!

GDDTracker is ready for 2018 with GDD tracking that began on February 15. New this year will be the Smith-Kerns Dollar Spot Prediction Model which will be launching soon. Check back soon for additional details!
 

March 29th, 2017Timing crabgrass pre-emergence applications

Please note that Dr. Frank has written another helpful article available from the MSU Extension web site.

http://msue.anr.msu.edu/news/timing_crabgrass_pre_emergence_applications


 

March 9th, 2017Controlling Annual Bluegrass Seedheads: Spray Now or Wait?

Dr. Kevin Frank has posted a useful article at the MSU Extension website. Please note it is written specifically for Michigan but may apply to other midwest regions.

"Growing degree-days have accumulated quickly, but it may not yet be time to apply plant growth regulators to control annual bluegrass seedheads on golf courses.

Read more: http://msue.anr.msu.edu/news/controlling_annual_bluegrass_seedheads_spray_now_or_wait


 

February 26th, 2017Early Spring in Michigan: Boom or Bust?

Dr. Kevin Frank has posted a helpful article on the MSU Extension website. Much of the midwest is experiencing the same (very) early warm-up, so non-Michiganders may find it help as well!

http://msue.anr.msu.edu/news/is_an_early_spring_a_boom_or_bust_for_golf_course_turf
 

February 16th, 2017Missing weather data

All air temperature data has been accounted for now.