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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Fri, Dec. 12. 2025

 
  

Ann Arbor, MI

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 18° 32° 3 0 0 0 0
02-16 20° 29° 6 0 0 0 0
02-17 4° 21° 6 0 0 0 0
02-18 -2° 16° 6 0 0 0 0
02-19 1° 17° 6 0 0 0 0
02-20 12° 22° 6 0 0 0 0
02-21 20° 32° 10 0 0 0 0
02-22 15° 29° 10 0 0 0 0
02-23 20° 37° 16 0 0 0 0
02-24 32° 50° 35 9 0 0 0
02-25 35° 54° 58 22 3 0 0
02-26 28° 36° 68 22 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 43° 84 28 3 0 0
02-28 29° 55° 104 38 3 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 21° 38° 112 38 3 0 0
03-02 15° 30° 112 38 3 0 0
03-03 18° 38° 118 38 3 0 0
03-04 33° 46° 136 45 3 0 0
03-05 34° 54° 158 57 4 0 0
03-06 26° 35° 166 57 4 0 0
03-07 28° 38° 177 58 4 0 0
03-08 22° 37° 184 58 4 0 0
03-09 32° 54° 205 69 6 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 64° 233 86 13 0 0
03-11 34° 56° 256 99 16 0 0
03-12 30° 47° 272 106 16 0 0
03-13 27° 57° 292 116 16 0 0
03-14 34° 71° 323 137 26 3 0
03-15 56° 72° 365 169 48 16 9
03-16 31° 57° 387 181 51 16 9
03-17 27° 45° 401 185 51 16 9
03-18 35° 68° 431 204 60 18 9
03-19 53° 72° 471 235 81 31 16
03-20 31° 56° 493 246 82 31 16
03-21 25° 51° 509 253 82 31 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 28° 47° 525 258 82 31 16
03-23 24° 39° 534 258 82 31 16
03-24 32° 42° 549 263 82 31 16
03-25 30° 45° 564 269 82 31 16
03-26 28° 45° 579 273 82 31 16
03-27 26° 55° 597 282 82 31 16
03-28 42° 65° 628 303 94 34 16
03-29 58° 66° 669 333 114 47 24
03-30 54° 68° 708 362 133 57 30
03-31 38° 57° 733 378 138 57 30
04-01 24° 43° 745 379 138 57 30
04-02 33° 51° 765 389 138 57 30
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 45° 64° 797 411 151 62 30
04-04 36° 52° 819 423 153 62 30
04-05 42° 49° 842 437 156 62 30
04-06 35° 46° 861 445 156 62 30
04-07 27° 46° 875 450 156 62 30
04-08 24° 37° 883 450 156 62 30
04-09 23° 44° 895 452 156 62 30
04-10 32° 37° 908 454 156 62 30
04-11 30° 51° 927 463 156 62 30
04-12 30° 55° 947 473 157 62 30
04-13 39° 57° 973 489 162 62 30
04-14 45° 71° 1009 515 178 70 33
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 40° 51° 1032 529 182 70 33
04-16 35° 51° 1054 540 183 70 33
04-17 31° 61° 1078 554 187 70 33
04-18 49° 81° 1121 587 210 85 43
04-19 50° 68° 1158 614 227 94 47
04-20 40° 58° 1185 631 234 94 47
04-21 46° 70° 1220 657 250 101 49
04-22 42° 65° 1252 678 261 105 49
04-23 47° 77° 1292 708 281 117 56
04-24 48° 82° 1335 741 304 132 66
04-25 54° 77° 1378 775 328 147 77
04-26 44° 61° 1409 795 338 150 77
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 37° 65° 1438 814 347 151 77
04-28 42° 74° 1474 840 363 159 80
04-29 53° 83° 1520 876 389 177 93
04-30 38° 62° 1548 894 397 177 93
05-01 45° 71° 1584 920 413 185 96
05-02 54° 68° 1623 949 433 196 102
05-03 46° 56° 1652 968 441 197 102
05-04 42° 53° 1678 984 447 197 102
05-05 48° 67° 1713 1010 463 205 105
05-06 53° 61° 1749 1035 478 212 107
05-07 53° 74° 1790 1066 499 225 115
05-08 44° 60° 1820 1086 509 227 115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 35° 64° 1848 1104 517 227 115
05-10 45° 78° 1888 1134 537 239 122
05-11 45° 68° 1922 1158 551 245 123
05-12 45° 79° 1962 1188 571 257 130
05-13 61° 68° 2004 1221 594 272 140
05-14 59° 75° 2049 1256 619 289 152
05-15 59° 81° 2097 1294 647 309 167
05-16 58° 82° 2146 1332 675 329 182
05-17 56° 71° 2188 1364 697 343 191
05-18 51° 65° 2224 1390 713 351 194
05-19 49° 60° 2256 1412 725 355 194
05-20 40° 55° 2281 1427 731 355 194
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 52° 2309 1446 739 356 194
05-22 48° 53° 2338 1464 747 356 194
05-23 41° 54° 2363 1479 753 356 194
05-24 42° 61° 2393 1499 762 358 194
05-25 40° 65° 2423 1520 773 360 194
05-26 42° 70° 2458 1544 787 367 195
05-27 51° 71° 2497 1573 806 378 201
05-28 53° 59° 2530 1597 820 383 202
05-29 55° 65° 2568 1625 838 393 207
05-30 49° 75° 2609 1655 858 406 214
05-31 51° 63° 2644 1680 873 413 216
06-01 41° 67° 2676 1702 885 417 216
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 43° 78° 2715 1731 904 428 222
06-03 53° 87° 2763 1769 932 448 237
06-04 67° 83° 2816 1812 965 473 257
06-05 56° 67° 2855 1841 984 484 263
06-06 59° 75° 2900 1876 1009 501 275
06-07 55° 77° 2944 1910 1033 517 286
06-08 58° 78° 2990 1946 1059 535 299
06-09 58° 77° 3035 1981 1084 552 311
06-10 51° 73° 3075 2011 1104 564 318
06-11 54° 84° 3122 2048 1131 583 332
06-12 61° 76° 3168 2085 1158 601 346
06-13 58° 70° 3210 2117 1180 615 355
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 74° 3255 2151 1204 632 366
06-15 55° 80° 3300 2187 1230 649 379
06-16 58° 81° 3348 2224 1258 669 394
06-17 62° 87° 3401 2267 1290 694 413
06-18 67° 82° 3453 2310 1323 718 433
06-19 62° 75° 3500 2346 1350 737 447
06-20 59° 79° 3547 2384 1377 756 461
06-21 68° 90° 3604 2431 1414 785 485
06-22 77° 93° 3667 2484 1457 820 515
06-23 74° 94° 3729 2535 1498 854 543
06-24 74° 92° 3790 2586 1539 887 571
06-25 71° 85° 3846 2632 1575 915 594
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 83° 3899 2675 1608 940 614
06-27 71° 89° 3957 2723 1646 970 639
06-28 69° 81° 4010 2766 1680 995 660
06-29 62° 86° 4062 2808 1712 1019 679
06-30 69° 84° 4116 2853 1746 1045 700
07-01 71° 83° 4172 2898 1781 1073 722
07-02 61° 85° 4223 2939 1812 1096 740
07-03 65° 85° 4276 2982 1845 1121 760
07-04 62° 87° 4329 3025 1878 1146 780
07-05 68° 90° 4386 3072 1915 1175 804
07-06 70° 91° 4444 3120 1953 1205 829
07-07 64° 76° 4492 3158 1981 1225 844
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 58° 84° 4541 3197 2010 1246 860
07-09 68° 79° 4593 3239 2042 1270 879
07-10 66° 84° 4645 3281 2075 1294 899
07-11 65° 85° 4698 3324 2108 1319 919
07-12 71° 86° 4755 3371 2144 1348 942
07-13 70° 86° 4811 3417 2180 1376 965
07-14 62° 83° 4861 3458 2211 1398 983
07-15 63° 87° 4914 3501 2244 1423 1003
07-16 71° 86° 4971 3547 2280 1452 1026
07-17 66° 75° 5020 3586 2309 1473 1042
07-18 56° 75° 5063 3619 2332 1488 1052
07-19 59° 82° 5112 3658 2361 1509 1068
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 65° 77° 5161 3697 2390 1530 1084
07-21 57° 78° 5206 3732 2415 1547 1096
07-22 54° 81° 5251 3768 2441 1564 1109
07-23 57° 87° 5302 3808 2471 1587 1126
07-24 71° 94° 5362 3858 2512 1619 1154
07-25 70° 85° 5418 3904 2547 1647 1176
07-26 71° 80° 5471 3948 2581 1672 1197
07-27 73° 89° 5530 3996 2620 1703 1223
07-28 68° 87° 5586 4042 2655 1731 1245
07-29 70° 86° 5642 4088 2691 1759 1268
07-30 63° 86° 5694 4131 2724 1783 1288
07-31 59° 74° 5739 4165 2749 1800 1300
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 57° 76° 5783 4200 2773 1816 1311
08-02 53° 76° 5826 4232 2795 1831 1320
08-03 54° 78° 5870 4266 2820 1847 1332
08-04 57° 80° 5917 4303 2846 1866 1345
08-05 63° 82° 5967 4343 2876 1888 1362
08-06 64° 84° 6019 4386 2909 1912 1382
08-07 65° 84° 6072 4428 2941 1937 1401
08-08 66° 86° 6126 4472 2976 1963 1423
08-09 68° 88° 6182 4518 3011 1991 1445
08-10 68° 90° 6239 4565 3048 2020 1469
08-11 69° 89° 6296 4612 3085 2049 1493
08-12 69° 89° 6353 4659 3123 2078 1518
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 82° 6407 4703 3156 2104 1538
08-14 62° 84° 6458 4744 3187 2127 1556
08-15 63° 85° 6510 4786 3219 2151 1575
08-16 67° 89° 6565 4831 3255 2178 1598
08-17 65° 82° 6617 4873 3286 2202 1616
08-18 55° 79° 6661 4908 3311 2218 1628
08-19 64° 77° 6710 4946 3339 2239 1643
08-20 65° 70° 6755 4981 3365 2256 1656
08-21 64° 74° 6802 5018 3391 2275 1669
08-22 56° 80° 6848 5054 3418 2293 1683
08-23 63° 78° 6897 5093 3446 2314 1698
08-24 55° 74° 6939 5125 3468 2328 1707
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 53° 67° 6977 5153 3486 2338 1712
08-26 47° 69° 7013 5179 3503 2346 1716
08-27 46° 73° 7050 5207 3520 2355 1720
08-28 52° 72° 7090 5236 3540 2367 1727
08-29 47° 66° 7125 5261 3555 2374 1729
08-30 45° 72° 7162 5288 3571 2383 1732
08-31 46° 76° 7201 5317 3590 2394 1738
09-01 48° 78° 7242 5348 3611 2407 1746
09-02 50° 79° 7284 5380 3634 2421 1756
09-03 52° 80° 7329 5415 3658 2438 1767
09-04 51° 66° 7365 5442 3675 2446 1771
09-05 47° 71° 7402 5468 3692 2455 1775
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 50° 64° 7437 5493 3706 2462 1776
09-07 41° 67° 7469 5515 3718 2466 1776
09-08 42° 69° 7503 5539 3732 2472 1777
09-09 44° 74° 7540 5566 3749 2481 1781
09-10 49° 78° 7581 5598 3771 2494 1790
09-11 50° 80° 7624 5630 3794 2509 1800
09-12 50° 80° 7668 5664 3817 2525 1810
09-13 53° 77° 7710 5697 3840 2539 1820
09-14 55° 82° 7757 5733 3866 2558 1833
09-15 54° 82° 7803 5769 3892 2576 1846
09-16 52° 83° 7848 5805 3918 2593 1859
09-17 52° 83° 7894 5840 3943 2611 1871
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 53° 86° 7941 5878 3971 2630 1886
09-19 61° 81° 7990 5916 4000 2651 1902
09-20 57° 80° 8037 5953 4026 2670 1915
09-21 59° 73° 8081 5987 4050 2686 1926
09-22 62° 76° 8128 6024 4077 2705 1940
09-23 60° 73° 8172 6058 4102 2721 1951
09-24 64° 74° 8219 6095 4128 2740 1965
09-25 61° 75° 8265 6131 4154 2758 1978
09-26 55° 79° 8310 6166 4179 2775 1990
09-27 55° 85° 8358 6204 4207 2795 2005
09-28 58° 81° 8406 6242 4235 2815 2020
09-29 51° 81° 8450 6276 4259 2831 2031
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 54° 82° 8496 6312 4285 2849 2044
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 29° 38° 12 2 0 0 0
02-16 24° 30° 17 2 0 0 0
02-17 17° 27° 17 2 0 0 0
02-18 17° 37° 21 2 0 0 0
02-19 18° 39° 28 2 0 0 0
02-20 24° 48° 42 6 0 0 0
02-21 30° 60° 65 18 3 0 0
02-22 34° 53° 86 30 4 0 0
02-23 27° 51° 103 37 4 0 0
02-24 19° 32° 107 37 4 0 0
02-25 24° 49° 121 41 4 0 0
02-26 34° 54° 143 53 6 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 40° 72° 176 76 19 6 1
02-28 22° 60° 196 86 19 6 1
02-29 22° 37° 203 86 19 6 1
03-01 26° 44° 216 89 19 6 1
03-02 37° 51° 238 101 21 6 1
03-03 34° 61° 264 116 27 6 1
03-04 40° 72° 297 140 40 11 1
03-05 42° 58° 325 158 48 11 1
03-06 38° 45° 345 167 48 11 1
03-07 37° 52° 367 180 51 11 1
03-08 40° 51° 391 193 54 11 1
03-09 35° 54° 413 205 56 11 1
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 39° 425 208 56 11 1
03-11 29° 55° 445 218 56 11 1
03-12 41° 68° 478 240 69 16 1
03-13 48° 70° 515 267 86 25 6
03-14 47° 57° 545 287 96 27 6
03-15 40° 51° 568 301 99 27 6
03-16 33° 58° 592 314 103 27 6
03-17 30° 42° 606 318 103 27 6
03-18 27° 34° 614 318 103 27 6
03-19 30° 46° 630 324 103 27 6
03-20 26° 37° 639 324 103 27 6
03-21 19° 36° 645 324 103 27 6
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 26° 32° 652 324 103 27 6
03-23 26° 35° 661 324 103 27 6
03-24 22° 39° 669 324 103 27 6
03-25 31° 63° 695 340 108 27 6
03-26 43° 59° 724 358 117 28 6
03-27 29° 42° 738 362 117 28 6
03-28 26° 46° 752 366 117 28 6
03-29 27° 52° 770 374 117 28 6
03-30 35° 45° 788 383 117 28 6
03-31 37° 44° 807 392 117 28 6
04-01 38° 54° 831 406 121 28 6
04-02 39° 46° 851 416 122 28 6
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 46° 871 426 122 28 6
04-04 33° 48° 889 434 122 28 6
04-05 34° 46° 907 442 122 28 6
04-06 37° 56° 932 456 126 28 6
04-07 32° 56° 954 468 128 28 6
04-08 46° 72° 991 496 145 37 10
04-09 47° 74° 1029 524 164 47 15
04-10 42° 65° 1061 545 175 51 15
04-11 46° 54° 1089 563 183 51 15
04-12 45° 50° 1114 579 189 51 15
04-13 40° 61° 1143 597 197 51 15
04-14 47° 78° 1183 628 218 64 23
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 46° 64° 1216 650 230 68 23
04-16 45° 65° 1249 674 244 74 23
04-17 51° 72° 1289 704 263 85 30
04-18 51° 65° 1325 730 279 94 33
04-19 44° 57° 1353 748 288 94 33
04-20 37° 46° 1373 757 288 94 33
04-21 34° 45° 1390 765 288 94 33
04-22 33° 63° 1416 781 294 94 33
04-23 48° 56° 1446 801 304 96 33
04-24 34° 48° 1465 810 304 96 33
04-25 28° 54° 1484 819 304 96 33
04-26 34° 61° 1510 834 309 96 33
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 50° 80° 1553 867 332 111 43
04-28 62° 79° 1601 906 360 131 58
04-29 62° 78° 1649 944 389 151 73
04-30 54° 71° 1690 974 409 164 81
05-01 49° 80° 1732 1007 431 178 90
05-02 48° 71° 1769 1034 449 187 94
05-03 57° 69° 1810 1065 470 200 102
05-04 54° 70° 1850 1095 490 212 109
05-05 58° 65° 1890 1125 509 224 116
05-06 48° 67° 1926 1150 525 232 119
05-07 46° 67° 1960 1175 539 238 120
05-08 52° 77° 2003 1207 562 253 130
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 50° 56° 2034 1229 573 256 130
05-10 44° 63° 2065 1250 585 259 130
05-11 50° 56° 2096 1271 595 262 130
05-12 42° 71° 2130 1295 610 268 131
05-13 57° 80° 2177 1332 636 287 145
05-14 59° 72° 2220 1365 660 302 155
05-15 53° 73° 2261 1396 680 315 163
05-16 48° 77° 2301 1426 701 327 170
05-17 60° 76° 2348 1462 727 346 183
05-18 60° 79° 2395 1500 754 365 198
05-19 58° 87° 2446 1540 785 388 215
05-20 61° 85° 2496 1581 816 410 233
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 63° 87° 2549 1624 848 435 253
05-22 68° 84° 2603 1668 882 461 274
05-23 55° 79° 2648 1703 907 478 286
05-24 50° 81° 2691 1736 931 493 296
05-25 61° 78° 2739 1774 958 513 311
05-26 52° 78° 2782 1807 981 528 321
05-27 60° 66° 2823 1837 1002 541 328
05-28 55° 69° 2863 1867 1022 553 335
05-29 53° 67° 2901 1895 1040 563 340
05-30 44° 70° 2936 1920 1055 570 342
05-31 45° 77° 2974 1949 1074 580 348
06-01 50° 78° 3017 1981 1096 595 357
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 61° 72° 3061 2015 1120 611 368
06-03 55° 77° 3105 2050 1144 627 380
06-04 59° 83° 3154 2089 1174 648 396
06-05 68° 80° 3206 2130 1205 672 414
06-06 59° 77° 3252 2166 1231 690 427
06-07 57° 69° 3293 2197 1252 703 435
06-08 50° 76° 3334 2228 1273 716 443
06-09 53° 73° 3375 2259 1294 729 451
06-10 52° 68° 3413 2287 1312 739 456
06-11 45° 73° 3449 2314 1329 747 460
06-12 58° 85° 3499 2353 1358 769 476
06-13 69° 90° 3556 2400 1395 798 500
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 81° 3606 2441 1425 820 518
06-15 51° 79° 3649 2474 1449 835 528
06-16 56° 86° 3698 2513 1478 856 544
06-17 68° 92° 3757 2561 1516 887 569
06-18 73° 89° 3816 2610 1555 918 595
06-19 75° 90° 3876 2661 1596 950 623
06-20 72° 89° 3935 2709 1634 981 648
06-21 68° 87° 3990 2755 1670 1008 671
06-22 70° 89° 4048 2803 1707 1038 696
06-23 68° 81° 4101 2845 1740 1063 715
06-24 62° 80° 4150 2885 1769 1084 732
06-25 67° 81° 4202 2927 1801 1108 751
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 79° 4253 2968 1833 1131 769
06-27 59° 73° 4297 3002 1856 1147 780
06-28 58° 72° 4340 3035 1879 1162 790
06-29 67° 88° 4395 3080 1915 1189 812
06-30 58° 79° 4440 3115 1939 1206 824
07-01 48° 75° 4480 3144 1959 1218 830
07-02 53° 78° 4524 3178 1983 1234 841
07-03 67° 84° 4577 3222 2017 1259 862
07-04 63° 82° 4627 3262 2047 1281 879
07-05 64° 79° 4677 3302 2076 1303 896
07-06 63° 78° 4726 3340 2105 1324 911
07-07 56° 83° 4773 3378 2132 1343 926
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 88° 4828 3422 2167 1370 947
07-09 69° 81° 4881 3465 2200 1395 967
07-10 63° 72° 4926 3501 2225 1412 980
07-11 62° 81° 4976 3540 2255 1434 996
07-12 66° 82° 5028 3582 2287 1458 1015
07-13 63° 86° 5081 3625 2320 1483 1035
07-14 70° 83° 5135 3670 2354 1509 1057
07-15 70° 86° 5191 3716 2390 1537 1080
07-16 68° 85° 5246 3760 2425 1564 1101
07-17 66° 80° 5297 3801 2456 1587 1119
07-18 57° 73° 5339 3834 2479 1601 1129
07-19 53° 78° 5383 3867 2502 1617 1139
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 56° 78° 5427 3902 2527 1633 1151
07-21 60° 82° 5476 3941 2556 1654 1167
07-22 64° 79° 5526 3981 2586 1676 1184
07-23 63° 84° 5577 4022 2617 1699 1202
07-24 65° 76° 5626 4060 2645 1720 1217
07-25 60° 78° 5672 4097 2672 1738 1231
07-26 56° 80° 5718 4133 2698 1756 1244
07-27 54° 83° 5765 4169 2724 1775 1257
07-28 59° 88° 5816 4211 2756 1798 1276
07-29 72° 82° 5872 4256 2791 1826 1298
07-30 69° 85° 5926 4301 2826 1852 1320
07-31 65° 90° 5982 4347 2861 1880 1343
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 67° 89° 6038 4392 2897 1908 1365
08-02 71° 82° 6092 4437 2932 1934 1387
08-03 67° 86° 6147 4482 2966 1961 1409
08-04 62° 88° 6200 4525 2999 1986 1429
08-05 69° 82° 6254 4569 3033 2012 1450
08-06 61° 73° 6299 4604 3058 2029 1462
08-07 59° 78° 6345 4640 3085 2047 1475
08-08 63° 81° 6395 4680 3115 2069 1492
08-09 62° 77° 6443 4717 3142 2089 1506
08-10 54° 72° 6484 4748 3163 2102 1514
08-11 54° 75° 6526 4781 3186 2116 1524
08-12 53° 79° 6570 4815 3209 2132 1535
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 56° 82° 6617 4852 3237 2151 1549
08-14 57° 82° 6665 4889 3264 2171 1563
08-15 60° 80° 6713 4927 3292 2191 1578
08-16 66° 80° 6764 4968 3323 2214 1596
08-17 67° 77° 6814 5008 3353 2236 1613
08-18 66° 77° 6863 5048 3383 2257 1630
08-19 55° 70° 6904 5079 3404 2270 1638
08-20 52° 70° 6943 5108 3422 2281 1644
08-21 46° 73° 6981 5135 3440 2291 1648
08-22 47° 77° 7021 5165 3460 2303 1655
08-23 51° 78° 7063 5198 3482 2317 1665
08-24 56° 84° 7111 5235 3510 2337 1679
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 90° 7166 5281 3545 2364 1702
08-26 66° 92° 7223 5328 3582 2393 1726
08-27 69° 95° 7283 5378 3622 2425 1753
08-28 69° 83° 7337 5422 3657 2451 1774
08-29 66° 80° 7388 5463 3688 2474 1792
08-30 68° 90° 7445 5510 3724 2503 1816
08-31 68° 82° 7498 5552 3757 2528 1835
09-01 61° 77° 7544 5589 3784 2546 1849
09-02 49° 70° 7582 5617 3801 2556 1854
09-03 46° 74° 7620 5645 3819 2566 1859
09-04 49° 78° 7661 5676 3841 2579 1867
09-05 53° 83° 7708 5712 3867 2598 1880
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 57° 69° 7748 5743 3888 2610 1888
09-07 46° 60° 7779 5764 3899 2613 1888
09-08 40° 70° 7812 5787 3911 2618 1888
09-09 52° 78° 7855 5820 3935 2633 1898
09-10 54° 81° 7901 5856 3960 2651 1911
09-11 54° 85° 7948 5893 3988 2670 1925
09-12 59° 85° 7998 5933 4018 2692 1942
09-13 59° 82° 8047 5971 4046 2713 1958
09-14 58° 82° 8095 6009 4074 2733 1973
09-15 58° 84° 8144 6048 4103 2754 1989
09-16 54° 82° 8190 6084 4129 2772 2002
09-17 52° 80° 8234 6118 4153 2788 2012
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 55° 82° 8280 6155 4179 2806 2026
09-19 56° 81° 8327 6192 4206 2825 2040
09-20 59° 85° 8376 6231 4236 2846 2056
09-21 59° 85° 8427 6271 4266 2869 2074
09-22 57° 83° 8475 6309 4294 2889 2089
09-23 58° 67° 8515 6340 4315 2901 2096
09-24 58° 69° 8557 6371 4336 2915 2105
09-25 62° 76° 8604 6409 4363 2934 2119
09-26 58° 71° 8647 6441 4386 2949 2128
09-27 59° 73° 8690 6475 4410 2964 2139
09-28 64° 68° 8734 6509 4434 2980 2150
09-29 65° 69° 8780 6544 4459 2998 2162
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 72° 8824 6578 4483 3014 2174

 

Latest Updates

February 15th, 2025Welcome to the 2025 GDD Tracking Season

Although winter seems very much entrenched in the Great Lakes region with snow and frigid temperatures in the forecast, GDDTracker starts counting on February 15. Spring is when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. Beyond the spring models, there are several models that may be helpful throughout the season including the early season dollar spot DMI timer and the Smith-Kerns dollar spot prediction model. To learn about all the available models, click on the "About" tab at the top of the screen. Thanks for your continued support and use of GDDTracker and best wishes for a successful 2025!
 

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

 

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