Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Tabular Data

Daily GDD accumulation for various base temperature models in 2014 & 2015

2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 -14° 0 0 0 0 0
02-20 -19° 17° 0 0 0 0 0
02-21 16° 30° 1 0 0 0 0
02-22 26° 1 0 0 0 0
02-23 -9° 10° 1 0 0 0 0
02-24 29° 1 0 0 0 0
02-25 23° 1 0 0 0 0
02-26 -1° 17° 1 0 0 0 0
02-27 -11° 13° 1 0 0 0 0
02-28 -8° 19° 1 0 0 0 0
03-01 16° 24° 1 0 0 0 0
03-02 30° 1 0 0 0 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 24° 33° 8 0 0 0 0
03-04 28° 8 0 0 0 0
03-05 -6° 14° 8 0 0 0 0
03-06 -10° 26° 8 0 0 0 0
03-07 21° 41° 17 0 0 0 0
03-08 19° 38° 23 0 0 0 0
03-09 16° 43° 31 0 0 0 0
03-10 33° 44° 48 7 0 0 0
03-11 30° 53° 67 16 0 0 0
03-12 31° 58° 89 28 2 0 0
03-13 36° 65° 118 47 11 1 0
03-14 42° 60° 147 66 20 2 0
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 27° 63° 170 79 23 2 0
03-16 46° 72° 208 106 40 11 4
03-17 33° 47° 225 114 40 11 4
03-18 25° 50° 241 120 40 11 4
03-19 36° 51° 262 131 42 11 4
03-20 38° 50° 285 143 44 11 4
03-21 32° 54° 306 154 45 11 4
03-22 28° 37° 316 155 45 11 4
03-23 28° 31° 324 155 45 11 4
03-24 20° 38° 331 155 45 11 4
03-25 34° 41° 346 160 45 11 4
03-26 27° 41° 358 162 45 11 4
2015Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 22° 33° 364 162 45 11 4
03-28 16° 39° 369 162 45 11 4
03-29 25° 46° 382 166 45 11 4
03-30 34° 57° 406 179 49 11 4
03-31 41° 60° 434 198 57 12 4
04-01 33° 67° 462 216 65 12 4
04-02 52° 64° 498 242 81 20 7
04-03 38° 47° 519 252 82 20 7
04-04 27° 53° 537 260 82 20 7
04-05 33° 58° 561 274 85 20 7
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-19 25° 40° 18 1 0 0 0
02-20 32° 44° 34 7 0 0 0
02-21 25° 35° 42 7 0 0 0
02-22 19° 32° 46 7 0 0 0
02-23 12° 25° 46 7 0 0 0
02-24 22° 46 7 0 0 0
02-25 20° 46 7 0 0 0
02-26 -4° 15° 46 7 0 0 0
02-27 -13° 17° 46 7 0 0 0
02-28 -17° 27° 46 7 0 0 0
03-01 10° 27° 46 7 0 0 0
03-02 -1° 11° 46 7 0 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-03 -12° 16° 46 7 0 0 0
03-04 24° 46 7 0 0 0
03-05 15° 22° 46 7 0 0 0
03-06 11° 29° 46 7 0 0 0
03-07 42° 48 7 0 0 0
03-08 35° 48 7 0 0 0
03-09 38° 48 7 0 0 0
03-10 38° 48° 70 18 1 0 0
03-11 31° 44° 85 23 1 0 0
03-12 34° 85 23 1 0 0
03-13 -2° 33° 85 23 1 0 0
03-14 35° 49° 105 34 1 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-15 24° 37° 114 34 1 0 0
03-16 10° 27° 114 34 1 0 0
03-17 -1° 34° 114 34 1 0 0
03-18 29° 51° 132 41 1 0 0
03-19 34° 45° 149 49 1 0 0
03-20 31° 45° 165 55 1 0 0
03-21 31° 55° 186 65 2 0 0
03-22 31° 41° 200 69 2 0 0
03-23 18° 30° 202 69 2 0 0
03-24 17° 35° 206 69 2 0 0
03-25 20° 29° 209 69 2 0 0
03-26 37° 209 69 2 0 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-27 34° 49° 228 78 2 0 0
03-28 34° 50° 248 89 2 0 0
03-29 30° 42° 262 93 2 0 0
03-30 21° 56° 279 99 2 0 0
03-31 41° 67° 311 121 14 4 0
04-01 31° 57° 333 133 16 4 0
04-02 32° 49° 351 142 16 4 0
04-03 35° 42° 368 148 16 4 0
04-04 35° 44° 385 156 16 4 0
04-05 31° 52° 405 165 16 4 0
04-06 27° 58° 425 176 17 4 0
04-07 31° 59° 449 189 20 4 0
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-08 44° 61° 479 210 31 6 0
04-09 31° 63° 504 225 36 6 0
04-10 42° 65° 536 246 48 10 0
04-11 32° 70° 565 266 57 12 0
04-12 41° 80° 604 294 75 22 6
04-13 45° 68° 638 319 90 28 7
04-14 30° 63° 663 333 94 28 7
04-15 20° 37° 669 333 94 28 7
04-16 16° 53° 682 336 94 28 7
04-17 41° 61° 711 355 103 29 7
04-18 36° 59° 737 371 109 29 7
04-19 34° 70° 766 390 118 31 7
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-20 42° 80° 806 420 138 42 13
04-21 55° 75° 849 453 161 57 23
04-22 40° 60° 877 471 169 58 23
04-23 29° 55° 897 481 169 58 23
04-24 38° 67° 927 501 180 60 23
04-25 47° 70° 964 528 196 69 27
04-26 39° 57° 990 544 202 69 27
04-27 40° 61° 1018 562 210 69 27
04-28 45° 55° 1046 580 219 69 27
04-29 49° 58° 1078 602 230 72 27
04-30 42° 51° 1102 616 235 72 27
05-01 41° 47° 1124 628 237 72 27
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-02 45° 52° 1151 645 244 72 27
05-03 45° 67° 1185 669 258 78 28
05-04 47° 60° 1217 691 269 82 28
05-05 45° 59° 1246 710 279 84 28
05-06 40° 66° 1277 731 290 87 28
05-07 51° 82° 1322 766 314 103 39
05-08 50° 90° 1370 804 342 123 55
05-09 56° 72° 1412 836 364 137 64
05-10 44° 78° 1451 865 383 148 70
05-11 55° 85° 1499 903 412 168 85
05-12 64° 86° 1552 946 445 193 105
05-13 53° 71° 1593 977 465 206 113
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-14 50° 57° 1624 998 477 210 113
05-15 41° 53° 1650 1014 482 210 113
05-16 36° 48° 1670 1024 482 210 113
05-17 38° 60° 1697 1041 489 210 113
05-18 43° 70° 1731 1065 504 216 114
05-19 45° 70° 1767 1091 519 224 117
05-20 61° 88° 1819 1133 552 248 136
05-21 68° 89° 1876 1180 589 277 160
05-22 57° 74° 1920 1214 612 293 171
05-23 49° 73° 1958 1242 631 303 176
05-24 44° 77° 1997 1271 649 314 182
05-25 47° 86° 2041 1305 674 330 193
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-26 63° 92° 2097 1351 709 358 216
05-27 68° 85° 2152 1396 744 384 237
05-28 59° 78° 2198 1432 771 403 251
05-29 56° 81° 2245 1469 797 422 265
05-30 54° 85° 2292 1506 825 441 279
05-31 57° 92° 2345 1549 857 465 298
06-01 65° 92° 2401 1595 893 494 322
06-02 71° 84° 2456 1640 929 521 344
06-03 67° 84° 2510 1684 962 546 364
06-04 60° 70° 2553 1717 985 561 374
06-05 50° 79° 2595 1749 1008 576 384
06-06 47° 84° 2639 1783 1032 592 395
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-07 54° 87° 2688 1822 1060 613 411
06-08 57° 76° 2732 1856 1085 629 422
06-09 54° 81° 2778 1892 1110 647 435
06-10 58° 72° 2821 1925 1133 662 445
06-11 57° 66° 2860 1954 1153 673 451
06-12 61° 80° 2909 1993 1181 694 467
06-13 53° 76° 2952 2026 1204 708 476
06-14 49° 82° 2995 2059 1227 724 487
06-15 62° 86° 3047 2101 1259 748 506
06-16 64° 91° 3102 2146 1295 775 528
06-17 76° 93° 3165 2199 1337 810 558
06-18 64° 82° 3217 2241 1369 834 577
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-19 62° 83° 3268 2282 1400 856 594
06-20 66° 86° 3321 2325 1434 882 615
06-21 64° 86° 3374 2368 1466 907 635
06-22 65° 85° 3427 2411 1500 932 655
06-23 68° 82° 3480 2454 1532 957 675
06-24 73° 85° 3537 2501 1570 986 699
06-25 63° 84° 3589 2543 1602 1010 718
06-26 59° 83° 3638 2582 1631 1031 734
06-27 61° 90° 3692 2626 1664 1057 755
06-28 73° 89° 3751 2675 1703 1088 781
06-29 69° 87° 3807 2721 1739 1116 804
06-30 68° 88° 3863 2767 1775 1144 827
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-01 66° 80° 3914 2808 1806 1167 845
07-02 58° 71° 3957 2841 1829 1181 854
07-03 56° 77° 4001 2875 1854 1198 866
07-04 54° 81° 4047 2911 1879 1216 879
07-05 59° 79° 4094 2948 1906 1235 893
07-06 64° 88° 4148 2992 1940 1261 914
07-07 72° 90° 4207 3041 1979 1291 939
07-08 71° 82° 4261 3085 2013 1318 961
07-09 61° 82° 4310 3124 2043 1339 977
07-10 57° 81° 4358 3162 2070 1358 991
07-11 58° 83° 4406 3200 2099 1379 1007
07-12 70° 81° 4460 3244 2132 1404 1027
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-13 68° 86° 4514 3288 2167 1431 1049
07-14 61° 81° 4563 3327 2196 1452 1065
07-15 53° 69° 4603 3357 2215 1464 1072
07-16 51° 73° 4643 3387 2235 1476 1079
07-17 50° 77° 4684 3418 2256 1489 1087
07-18 55° 81° 4730 3454 2282 1507 1100
07-19 55° 82° 4776 3490 2308 1525 1113
07-20 57° 83° 4824 3528 2336 1545 1128
07-21 59° 87° 4875 3569 2368 1568 1146
07-22 68° 91° 4933 3617 2405 1598 1171
07-23 60° 80° 4981 3655 2433 1618 1186
07-24 52° 78° 5024 3688 2456 1633 1196
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-25 53° 75° 5066 3720 2479 1647 1205
07-26 68° 85° 5121 3765 2513 1674 1227
07-27 67° 88° 5177 3811 2549 1701 1249
07-28 57° 74° 5220 3844 2573 1717 1260
07-29 55° 80° 5266 3880 2598 1735 1273
07-30 57° 82° 5313 3917 2626 1754 1287
07-31 57° 85° 5362 3956 2655 1775 1303
08-01 60° 82° 5412 3996 2684 1796 1319
08-02 57° 86° 5461 4035 2714 1818 1336
08-03 61° 86° 5513 4077 2745 1842 1355
08-04 64° 85° 5565 4119 2778 1866 1374
08-05 66° 81° 5617 4161 2809 1890 1393
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-06 61° 83° 5667 4201 2839 1912 1410
08-07 58° 83° 5715 4239 2868 1932 1425
08-08 63° 84° 5767 4281 2899 1955 1443
08-09 63° 82° 5817 4321 2930 1978 1461
08-10 67° 85° 5871 4365 2964 2004 1482
08-11 67° 83° 5924 4408 2996 2029 1502
08-12 61° 70° 5968 4442 3020 2044 1512
08-13 53° 83° 6014 4478 3046 2063 1526
08-14 57° 75° 6058 4512 3070 2079 1537
08-15 49° 78° 6099 4543 3092 2092 1545
08-16 59° 81° 6147 4581 3120 2112 1560
08-17 62° 75° 6194 4618 3146 2131 1574
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-18 63° 84° 6245 4659 3178 2154 1592
08-19 69° 86° 6301 4705 3214 2182 1615
08-20 64° 87° 6354 4748 3247 2207 1635
08-21 70° 79° 6407 4791 3279 2232 1655
08-22 73° 87° 6465 4839 3317 2262 1680
08-23 69° 85° 6520 4884 3353 2289 1702
08-24 69° 88° 6577 4931 3389 2317 1725
08-25 71° 84° 6632 4976 3425 2345 1748
08-26 69° 84° 6687 5021 3460 2372 1770
08-27 65° 83° 6740 5064 3492 2397 1790
08-28 63° 80° 6790 5104 3522 2418 1806
08-29 69° 88° 6846 5150 3558 2447 1830
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-30 71° 83° 6901 5195 3593 2474 1852
08-31 65° 86° 6955 5239 3627 2499 1872
09-01 71° 83° 7009 5283 3662 2526 1894
09-02 65° 84° 7061 5325 3694 2550 1913
09-03 58° 84° 7111 5365 3723 2572 1930
09-04 71° 84° 7166 5410 3758 2599 1952
09-05 65° 86° 7219 5453 3792 2624 1972
09-06 58° 76° 7264 5488 3817 2641 1984
09-07 51° 80° 7308 5522 3840 2656 1994
09-08 52° 78° 7351 5555 3863 2672 2005
09-09 62° 80° 7400 5594 3892 2693 2021
09-10 59° 79° 7447 5631 3919 2712 2035
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-11 49° 57° 7478 5652 3930 2715 2035
09-12 45° 57° 7507 5671 3939 2715 2035
09-13 38° 58° 7533 5687 3945 2715 2035
09-14 38° 65° 7562 5706 3955 2717 2035
09-15 45° 59° 7592 5726 3965 2719 2035
09-16 41° 67° 7624 5748 3977 2723 2035
09-17 40° 70° 7658 5772 3990 2728 2035
09-18 46° 71° 7694 5798 4006 2737 2038
09-19 47° 75° 7733 5827 4025 2748 2044
09-20 59° 76° 7779 5863 4051 2765 2057
09-21 50° 68° 7816 5890 4068 2774 2061
09-22 41° 69° 7849 5913 4081 2779 2061
2014Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-23 44° 75° 7886 5940 4099 2789 2066
09-24 47° 78° 7927 5971 4119 2801 2073
09-25 51° 77° 7969 6003 4141 2815 2082
09-26 48° 82° 8012 6036 4164 2831 2092
09-27 54° 81° 8058 6072 4190 2848 2105
09-28 50° 82° 8101 6105 4214 2864 2115
09-29 53° 84° 8148 6142 4240 2882 2129
09-30 46° 58° 8178 6162 4250 2885 2129

 

Latest Updates

March 23rd, 2015Crabgrass PRE Indicators Moving North

Last week started with a bang, but was mostly mild and steady. Evening winds helped things dry out here and there. Most accumulations are on pace with 2014 or slightly ahead now. Snow in Chicago today is a reminder that March is not over. Sign up for you automatic alerts using the link above.
 

March 16th, 2015Melting Snow, Clear Skies

What a difference a week makes. I think we can see spring from here. As the weather forecast from last week indicated, we made up for lost time across the Midwest last week. Most models are at or ahead of last year after being behind.
 

March 16th, 2015Mapping and Forecast Functions Restored

Well, that was fun. After a little bit of lost sleep (OK, actually several nights) the mapping and forecast functions have been restored. Thanks to the GDDTracker technical team for sticking with it to get this fixed.
 

March 10th, 2015Follow GDDTracker on Twitter.

We will be providing periodic updates and comments this spring via Twitter. If you would like to be part of that conversation, give us a follow @gddtracker.
 

March 9th, 2015Spring is on the way (we hope).

GDDTracker is reset for 2015. Although it's been abnormally cold for most the region it looks like things will warm up for most of this week and start melting some snow. Over the winter the NWS upgraded their forecast resolution (which is great), however, this is playing havoc with our mapping formulas. We are re-writing the code so we can properly provide forecasts by zip code. Stay tuned, hope to have this fixed soon.
 

March 2nd, 2014Ready, Set... Reset, Go!

The GDD totals were mistakenly reset on Jan 3rd instead of Feb 15th. This has been corrected. Some alerts may be resent due to the change. Thank you!
 

April 9th, 2013GDDTracker Expands Coverage

With initial funding provided by the Michigan State University and the Michigan Turfgrass Foundation, GDDTracker has been helping turf managers schedule Poa annua seedhead suppression applications throughout the Great Lakes states since 2004. Over the last couple years we've been considering several strategies for expanding the geographical reach of GDDTracker beyond our base region. After much consideration we have decided to expand coverage from Colorado to the atlantic coast. Historically the models we've used to schedule PGR applications to suppress Poa seedheads in our region have been successful but as we move outside of our immediate comfort zone users should keep in mind that the ultimate combination of personal observations, experience, and GDD models should all be considered when scheduling applications. Although GDDTracker started as a guide for scheduling PGR applications for Poa seedhead suppression, over the years we have added models for crabgrass preemergence, spring broadleaf, and others. As GDDTracker grows we will continue to move forward with additional models. We hope you find GDDTracker useful for your operation and as always your feedback is always encouraged.