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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Sun, Dec. 14. 2025

 
  

Argonne, IL

        

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 24° 34° 7 0 0 0 0
02-16 12° 29° 7 0 0 0 0
02-17 3° 11° 7 0 0 0 0
02-18 -5° 15° 7 0 0 0 0
02-19 6° 17° 7 0 0 0 0
02-20 3° 22° 7 0 0 0 0
02-21 7° 29° 7 0 0 0 0
02-22 12° 36° 10 0 0 0 0
02-23 22° 48° 23 3 0 0 0
02-24 38° 56° 48 18 5 0 0
02-25 35° 55° 71 31 8 0 0
02-26 34° 53° 92 43 10 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 49° 112 53 10 0 0
02-28 32° 58° 135 66 13 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 19° 38° 142 66 13 0 0
03-02 14° 37° 145 66 13 0 0
03-03 25° 47° 160 70 13 0 0
03-04 43° 47° 183 83 16 0 0
03-05 29° 50° 201 91 16 0 0
03-06 28° 40° 213 93 16 0 0
03-07 32° 36° 225 95 16 0 0
03-08 29° 49° 242 102 16 0 0
03-09 30° 58° 264 115 18 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 68° 295 135 28 2 0
03-11 36° 56° 319 149 33 2 0
03-12 36° 58° 344 164 37 2 0
03-13 33° 66° 371 182 45 2 0
03-14 49° 79° 413 213 67 16 9
03-15 44° 68° 447 238 81 22 10
03-16 30° 43° 462 242 81 22 10
03-17 26° 52° 479 249 81 22 10
03-18 44° 74° 516 276 98 31 14
03-19 40° 60° 544 294 106 31 14
03-20 30° 43° 558 298 106 31 14
03-21 30° 59° 581 311 108 31 14
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 36° 51° 602 323 110 31 14
03-23 36° 49° 623 333 110 31 14
03-24 34° 49° 642 343 110 31 14
03-25 29° 52° 661 351 110 31 14
03-26 27° 54° 679 360 110 31 14
03-27 42° 53° 705 375 116 31 14
03-28 48° 80° 747 407 138 45 23
03-29 55° 68° 786 436 157 56 29
03-30 46° 75° 825 465 175 67 35
03-31 35° 46° 843 474 175 67 35
04-01 30° 47° 860 480 175 67 35
04-02 41° 71° 894 504 189 73 35
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 63° 925 525 200 76 35
04-04 38° 50° 947 537 202 76 35
04-05 41° 53° 972 552 207 76 35
04-06 35° 49° 992 562 207 76 35
04-07 30° 45° 1007 568 207 76 35
04-08 25° 44° 1020 570 207 76 35
04-09 32° 44° 1036 576 207 76 35
04-10 38° 49° 1057 588 209 76 35
04-11 36° 53° 1080 600 211 76 35
04-12 33° 62° 1105 616 217 76 35
04-13 52° 64° 1142 642 233 84 39
04-14 53° 63° 1178 668 249 92 42
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 41° 56° 1204 684 255 92 42
04-16 32° 55° 1225 696 257 92 42
04-17 40° 64° 1255 715 266 93 42
04-18 58° 77° 1300 751 292 111 54
04-19 45° 66° 1334 775 306 117 55
04-20 48° 65° 1368 799 320 123 56
04-21 49° 62° 1402 822 333 128 57
04-22 40° 74° 1437 847 349 136 59
04-23 55° 77° 1481 881 373 152 70
04-24 53° 80° 1526 916 397 168 81
04-25 49° 61° 1559 939 410 173 82
04-26 44° 55° 1586 957 418 173 82
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 69° 1617 977 428 176 82
04-28 53° 84° 1664 1014 455 195 95
04-29 55° 74° 1706 1046 477 209 105
04-30 46° 64° 1739 1070 491 215 105
05-01 53° 69° 1779 1099 510 226 112
05-02 47° 60° 1810 1121 522 230 112
05-03 44° 57° 1839 1140 531 230 112
05-04 46° 57° 1869 1159 540 232 112
05-05 48° 62° 1902 1182 554 237 112
05-06 46° 77° 1941 1212 573 249 118
05-07 50° 78° 1983 1244 595 263 127
05-08 47° 61° 2015 1265 606 266 127
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 38° 67° 2046 1286 617 269 127
05-10 45° 76° 2084 1314 636 279 133
05-11 43° 75° 2121 1341 653 288 137
05-12 52° 82° 2166 1376 677 305 148
05-13 63° 79° 2215 1415 706 326 164
05-14 60° 80° 2263 1453 734 346 179
05-15 65° 94° 2320 1500 772 375 203
05-16 62° 87° 2372 1543 804 400 223
05-17 53° 70° 2412 1572 824 411 229
05-18 48° 69° 2449 1599 840 420 233
05-19 45° 55° 2477 1617 848 420 233
05-20 51° 60° 2510 1641 862 426 234
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 50° 54° 2540 1661 872 428 234
05-22 49° 58° 2572 1682 883 431 234
05-23 43° 66° 2605 1705 896 436 234
05-24 43° 68° 2638 1729 910 441 234
05-25 52° 66° 2675 1756 927 450 238
05-26 45° 70° 2710 1781 942 458 240
05-27 53° 68° 2749 1810 961 468 246
05-28 55° 65° 2787 1838 979 479 251
05-29 53° 71° 2827 1867 998 490 258
05-30 52° 75° 2868 1899 1020 504 266
05-31 52° 68° 2906 1926 1038 513 271
06-01 43° 73° 2942 1952 1053 521 274
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 47° 85° 2985 1986 1077 537 284
06-03 67° 88° 3041 2031 1112 564 307
06-04 59° 73° 3085 2065 1136 580 318
06-05 55° 72° 3126 2096 1157 593 326
06-06 62° 79° 3175 2135 1186 614 342
06-07 58° 79° 3221 2171 1213 632 355
06-08 59° 81° 3269 2209 1241 652 370
06-09 54° 72° 3310 2240 1262 665 378
06-10 53° 78° 3354 2274 1285 681 389
06-11 63° 91° 3409 2319 1320 708 411
06-12 65° 85° 3462 2362 1354 733 431
06-13 62° 74° 3508 2399 1380 752 444
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 63° 78° 3557 2437 1409 772 460
06-15 59° 83° 3606 2477 1438 794 476
06-16 63° 88° 3660 2520 1471 819 497
06-17 72° 92° 3720 2570 1511 851 524
06-18 68° 82° 3773 2613 1544 876 544
06-19 66° 83° 3825 2656 1577 901 563
06-20 68° 84° 3879 2699 1611 926 584
06-21 76° 94° 3942 2753 1654 962 614
06-22 79° 94° 4007 2807 1698 998 646
06-23 78° 94° 4071 2861 1742 1034 677
06-24 77° 95° 4135 2915 1786 1070 708
06-25 73° 90° 4194 2965 1826 1101 734
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 76° 94° 4257 3018 1869 1137 764
06-27 77° 87° 4317 3068 1909 1169 791
06-28 68° 90° 4374 3114 1946 1197 815
06-29 73° 92° 4435 3165 1986 1230 842
06-30 75° 89° 4495 3215 2026 1262 870
07-01 71° 87° 4551 3262 2063 1290 893
07-02 68° 89° 4608 3308 2099 1319 917
07-03 70° 92° 4667 3357 2138 1350 943
07-04 74° 91° 4728 3408 2179 1383 970
07-05 73° 93° 4789 3459 2220 1416 999
07-06 71° 87° 4845 3506 2257 1445 1022
07-07 66° 85° 4899 3549 2290 1470 1043
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 68° 86° 4954 3594 2325 1497 1065
07-09 70° 83° 5008 3638 2360 1523 1086
07-10 68° 88° 5064 3684 2396 1551 1109
07-11 71° 90° 5122 3733 2434 1581 1134
07-12 69° 82° 5176 3776 2467 1607 1155
07-13 68° 81° 5229 3819 2500 1632 1174
07-14 61° 87° 5281 3861 2532 1656 1194
07-15 68° 91° 5338 3909 2570 1686 1218
07-16 73° 91° 5398 3959 2610 1718 1245
07-17 64° 76° 5447 3997 2638 1738 1260
07-18 58° 84° 5496 4036 2667 1759 1277
07-19 73° 82° 5551 4081 2703 1786 1299
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 68° 76° 5601 4121 2733 1808 1316
07-21 64° 84° 5653 4163 2764 1832 1335
07-22 67° 86° 5708 4208 2799 1859 1356
07-23 71° 93° 5767 4258 2839 1891 1383
07-24 71° 93° 5827 4308 2879 1923 1410
07-25 74° 82° 5884 4354 2915 1951 1434
07-26 72° 83° 5939 4399 2950 1978 1456
07-27 74° 88° 5998 4448 2990 2009 1482
07-28 77° 89° 6059 4499 3030 2042 1510
07-29 71° 89° 6117 4547 3069 2072 1535
07-30 70° 82° 6171 4592 3103 2099 1556
07-31 67° 76° 6221 4631 3132 2120 1573
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 61° 76° 6267 4667 3159 2138 1586
08-02 57° 79° 6313 4704 3185 2157 1599
08-03 58° 81° 6361 4741 3212 2176 1614
08-04 62° 82° 6411 4781 3242 2198 1631
08-05 63° 84° 6462 4823 3274 2221 1649
08-06 64° 86° 6515 4866 3307 2247 1669
08-07 71° 91° 6574 4914 3346 2277 1695
08-08 73° 90° 6634 4964 3385 2309 1721
08-09 74° 92° 6694 5015 3426 2342 1749
08-10 76° 89° 6755 5066 3467 2374 1777
08-11 74° 87° 6814 5114 3505 2405 1803
08-12 73° 86° 6871 5161 3542 2434 1827
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 68° 84° 6925 5205 3577 2460 1848
08-14 66° 84° 6978 5248 3610 2485 1868
08-15 67° 90° 7034 5295 3646 2514 1891
08-16 73° 94° 7096 5346 3688 2547 1920
08-17 71° 83° 7151 5391 3723 2574 1942
08-18 72° 86° 7208 5438 3759 2603 1966
08-19 71° 78° 7261 5481 3792 2628 1986
08-20 67° 76° 7310 5520 3822 2649 2002
08-21 63° 75° 7357 5557 3848 2668 2016
08-22 62° 80° 7406 5596 3877 2689 2032
08-23 66° 82° 7458 5638 3909 2713 2051
08-24 57° 72° 7500 5670 3932 2727 2060
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 53° 68° 7539 5699 3950 2738 2066
08-26 50° 72° 7578 5728 3970 2749 2072
08-27 51° 75° 7619 5759 3990 2762 2080
08-28 61° 77° 7666 5796 4018 2781 2094
08-29 53° 72° 7707 5827 4038 2794 2102
08-30 60° 74° 7751 5862 4063 2811 2113
08-31 54° 76° 7794 5895 4086 2825 2123
09-01 57° 77° 7839 5929 4110 2842 2135
09-02 56° 80° 7885 5965 4136 2860 2148
09-03 58° 72° 7928 5998 4159 2875 2158
09-04 48° 66° 7963 6023 4174 2882 2159
09-05 56° 67° 8002 6052 4193 2893 2166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 45° 66° 8035 6075 4207 2898 2166
09-07 43° 67° 8068 6098 4220 2903 2166
09-08 45° 72° 8104 6124 4236 2911 2169
09-09 46° 75° 8143 6153 4254 2922 2175
09-10 59° 82° 8191 6192 4283 2943 2190
09-11 62° 82° 8241 6232 4313 2965 2207
09-12 58° 84° 8291 6271 4342 2986 2224
09-13 65° 77° 8340 6310 4371 3007 2239
09-14 64° 84° 8391 6352 4403 3031 2258
09-15 62° 86° 8443 6393 4435 3054 2277
09-16 59° 84° 8492 6433 4464 3076 2293
09-17 57° 84° 8541 6471 4493 3096 2309
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 58° 87° 8592 6512 4523 3119 2327
09-19 65° 89° 8647 6557 4558 3146 2349
09-20 66° 78° 8696 6597 4588 3168 2365
09-21 66° 81° 8748 6638 4619 3191 2384
09-22 65° 81° 8799 6679 4651 3214 2402
09-23 66° 79° 8849 6720 4681 3236 2419
09-24 62° 73° 8895 6755 4707 3254 2432
09-25 59° 75° 8940 6790 4731 3271 2444
09-26 56° 82° 8987 6827 4758 3290 2457
09-27 59° 86° 9037 6868 4789 3313 2475
09-28 60° 82° 9086 6907 4818 3334 2491
09-29 58° 89° 9138 6948 4849 3357 2510
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 60° 83° 9188 6988 4879 3379 2527
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 44° 16 6 0 0 0
02-16 27° 32° 23 6 0 0 0
02-17 12° 27° 23 6 0 0 0
02-18 21° 44° 34 6 0 0 0
02-19 22° 50° 47 10 0 0 0
02-20 27° 56° 67 20 0 0 0
02-21 43° 64° 99 41 11 3 0
02-22 44° 59° 128 61 21 5 0
02-23 27° 52° 146 68 21 5 0
02-24 20° 35° 151 68 21 5 0
02-25 31° 60° 174 81 24 5 0
02-26 38° 72° 207 104 37 10 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 53° 72° 248 135 58 23 8
02-28 22° 53° 263 141 58 23 8
02-29 18° 45° 273 141 58 23 8
03-01 27° 47° 288 145 58 23 8
03-02 34° 60° 312 160 63 23 8
03-03 43° 72° 348 186 78 30 10
03-04 52° 71° 388 215 98 42 17
03-05 40° 59° 415 233 106 42 17
03-06 37° 49° 437 245 107 42 17
03-07 35° 48° 456 254 107 42 17
03-08 42° 47° 479 267 110 42 17
03-09 33° 44° 496 273 110 42 17
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 47° 512 280 110 42 17
03-11 28° 67° 538 295 115 42 17
03-12 44° 71° 573 321 131 49 19
03-13 47° 72° 610 348 148 59 24
03-14 45° 68° 645 372 162 65 25
03-15 38° 53° 668 385 165 65 25
03-16 39° 57° 694 401 171 65 25
03-17 32° 41° 708 406 171 65 25
03-18 26° 34° 716 406 171 65 25
03-19 28° 57° 737 417 172 65 25
03-20 29° 46° 753 422 172 65 25
03-21 27° 41° 765 424 172 65 25
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 42° 780 429 172 65 25
03-23 30° 38° 792 431 172 65 25
03-24 31° 50° 810 440 172 65 25
03-25 46° 62° 842 462 184 69 25
03-26 35° 54° 864 474 186 69 25
03-27 29° 43° 878 478 186 69 25
03-28 30° 50° 896 485 186 69 25
03-29 33° 58° 919 499 189 69 25
03-30 42° 61° 949 519 199 71 25
03-31 38° 56° 974 533 204 71 25
04-01 42° 49° 997 547 207 71 25
04-02 36° 55° 1021 560 211 71 25
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 37° 1034 564 211 71 25
04-04 36° 41° 1051 570 211 71 25
04-05 37° 47° 1071 580 211 71 25
04-06 31° 53° 1090 590 211 71 25
04-07 38° 53° 1114 604 215 71 25
04-08 47° 70° 1151 630 231 79 28
04-09 50° 61° 1184 654 245 84 29
04-10 42° 66° 1216 676 257 89 29
04-11 50° 59° 1249 698 269 93 29
04-12 48° 62° 1281 721 282 98 29
04-13 41° 72° 1316 746 297 104 30
04-14 61° 81° 1365 784 325 125 46
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 69° 1403 812 343 135 51
04-16 55° 76° 1446 846 367 151 62
04-17 59° 68° 1488 877 388 164 70
04-18 46° 63° 1520 900 401 169 70
04-19 41° 56° 1547 916 408 169 70
04-20 35° 46° 1565 925 408 169 70
04-21 31° 48° 1583 932 408 169 70
04-22 38° 66° 1613 952 417 171 70
04-23 55° 62° 1649 979 434 179 73
04-24 36° 52° 1671 990 436 179 73
04-25 30° 60° 1694 1003 439 179 73
04-26 43° 59° 1723 1022 448 180 73
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 60° 76° 1769 1058 474 198 86
04-28 62° 74° 1815 1095 500 216 100
04-29 58° 69° 1857 1126 522 230 108
04-30 48° 74° 1896 1155 540 241 114
05-01 62° 75° 1942 1192 567 259 127
05-02 54° 78° 1986 1225 591 275 138
05-03 54° 68° 2025 1254 610 286 144
05-04 49° 80° 2067 1287 632 301 154
05-05 52° 65° 2104 1314 649 309 158
05-06 48° 74° 2143 1343 668 320 164
05-07 60° 75° 2189 1378 694 338 176
05-08 53° 80° 2234 1413 719 355 188
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 52° 66° 2271 1440 735 364 192
05-10 47° 66° 2305 1465 750 370 193
05-11 50° 70° 2343 1492 768 380 198
05-12 49° 82° 2386 1526 791 396 209
05-13 61° 79° 2435 1564 819 416 224
05-14 55° 66° 2473 1593 838 426 229
05-15 53° 69° 2512 1622 857 438 236
05-16 52° 72° 2552 1652 877 449 243
05-17 60° 80° 2600 1690 905 469 258
05-18 61° 85° 2651 1730 936 492 275
05-19 64° 78° 2700 1769 964 513 291
05-20 62° 85° 2751 1811 996 536 309
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 63° 89° 2805 1855 1030 563 331
05-22 63° 79° 2854 1894 1059 583 347
05-23 55° 80° 2900 1929 1085 601 359
05-24 64° 77° 2948 1968 1113 621 375
05-25 57° 76° 2992 2002 1137 637 386
05-26 56° 76° 3036 2035 1161 653 396
05-27 58° 73° 3080 2069 1184 669 407
05-28 55° 73° 3121 2101 1206 683 416
05-29 54° 69° 3161 2131 1226 694 423
05-30 46° 71° 3198 2157 1242 703 426
05-31 48° 80° 3240 2189 1264 717 435
06-01 61° 68° 3283 2222 1287 732 445
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 59° 76° 3328 2258 1313 750 458
06-03 58° 87° 3379 2299 1344 772 475
06-04 70° 86° 3435 2345 1380 800 498
06-05 69° 77° 3486 2386 1411 823 517
06-06 64° 78° 3535 2425 1440 844 533
06-07 58° 79° 3582 2461 1467 863 546
06-08 57° 77° 3627 2497 1492 880 558
06-09 54° 80° 3672 2531 1517 897 570
06-10 54° 70° 3712 2562 1537 909 578
06-11 48° 79° 3754 2593 1559 923 586
06-12 66° 91° 3810 2639 1595 951 609
06-13 72° 90° 3869 2688 1634 982 635
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 66° 87° 3924 2733 1668 1009 657
06-15 60° 86° 3975 2774 1700 1032 675
06-16 70° 94° 4035 2824 1739 1064 702
06-17 76° 95° 4098 2878 1783 1100 733
06-18 77° 92° 4161 2931 1826 1134 763
06-19 76° 92° 4223 2983 1868 1169 792
06-20 69° 92° 4282 3031 1906 1199 817
06-21 67° 94° 4340 3079 1945 1229 842
06-22 77° 92° 4403 3132 1987 1264 872
06-23 71° 82° 4457 3177 2022 1290 894
06-24 65° 87° 4511 3221 2056 1316 915
06-25 73° 81° 4566 3266 2091 1343 936
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 72° 86° 4623 3312 2128 1372 960
06-27 62° 75° 4669 3349 2154 1390 974
06-28 63° 75° 4716 3386 2181 1409 988
06-29 72° 87° 4774 3433 2218 1439 1012
06-30 60° 79° 4818 3468 2243 1456 1024
07-01 52° 77° 4861 3500 2266 1470 1033
07-02 65° 84° 4914 3543 2298 1495 1053
07-03 73° 88° 4972 3592 2337 1525 1078
07-04 69° 82° 5026 3635 2371 1551 1099
07-05 69° 81° 5079 3678 2404 1576 1119
07-06 63° 81° 5129 3718 2433 1598 1136
07-07 63° 87° 5182 3761 2467 1623 1156
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 85° 5237 3807 2502 1650 1178
07-09 70° 79° 5290 3849 2535 1675 1198
07-10 67° 83° 5343 3893 2568 1700 1218
07-11 68° 82° 5396 3935 2601 1725 1238
07-12 66° 86° 5450 3980 2635 1751 1260
07-13 68° 92° 5508 4027 2673 1781 1284
07-14 68° 88° 5564 4073 2709 1809 1307
07-15 68° 89° 5620 4120 2745 1837 1331
07-16 68° 83° 5674 4163 2779 1863 1351
07-17 69° 82° 5728 4207 2812 1889 1372
07-18 60° 75° 5773 4243 2838 1907 1385
07-19 56° 79° 5819 4278 2864 1924 1397
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 60° 80° 5867 4316 2892 1944 1412
07-21 65° 83° 5919 4358 2923 1968 1431
07-22 65° 84° 5971 4401 2956 1992 1451
07-23 66° 84° 6024 4444 2989 2017 1471
07-24 66° 77° 6073 4483 3018 2039 1487
07-25 63° 79° 6122 4522 3047 2059 1503
07-26 57° 82° 6169 4559 3074 2079 1517
07-27 61° 84° 6220 4599 3105 2101 1534
07-28 68° 82° 6273 4642 3138 2126 1554
07-29 70° 81° 6327 4686 3171 2152 1575
07-30 69° 90° 6384 4734 3209 2181 1600
07-31 70° 89° 6442 4781 3247 2211 1624
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 72° 85° 6498 4828 3283 2240 1648
08-02 70° 84° 6553 4873 3318 2266 1670
08-03 70° 90° 6611 4921 3356 2297 1695
08-04 70° 89° 6669 4968 3393 2326 1719
08-05 74° 91° 6729 5019 3434 2358 1747
08-06 69° 76° 6780 5059 3465 2381 1764
08-07 64° 78° 6829 5099 3494 2402 1780
08-08 60° 82° 6878 5138 3523 2424 1797
08-09 59° 73° 6922 5172 3547 2440 1808
08-10 53° 74° 6964 5203 3569 2453 1816
08-11 54° 78° 7008 5237 3592 2469 1827
08-12 55° 77° 7052 5272 3617 2485 1839
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 58° 84° 7101 5311 3646 2507 1855
08-14 62° 86° 7153 5353 3678 2531 1874
08-15 66° 75° 7202 5392 3707 2551 1890
08-16 67° 85° 7256 5436 3741 2578 1911
08-17 67° 78° 7307 5477 3772 2600 1929
08-18 66° 77° 7357 5516 3802 2622 1945
08-19 63° 75° 7403 5553 3828 2641 1959
08-20 57° 71° 7446 5585 3851 2655 1968
08-21 52° 75° 7487 5617 3872 2668 1977
08-22 51° 77° 7530 5649 3894 2683 1986
08-23 53° 81° 7574 5684 3919 2700 1998
08-24 60° 90° 7627 5727 3952 2724 2018
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 71° 91° 7686 5775 3991 2755 2043
08-26 75° 94° 7749 5828 4033 2790 2073
08-27 75° 97° 7813 5882 4078 2826 2104
08-28 71° 83° 7868 5927 4113 2853 2126
08-29 70° 87° 7924 5974 4149 2881 2150
08-30 72° 85° 7981 6020 4186 2910 2173
08-31 62° 82° 8031 6060 4215 2932 2190
09-01 63° 77° 8079 6098 4243 2952 2205
09-02 56° 75° 8122 6131 4267 2967 2215
09-03 53° 78° 8165 6165 4290 2982 2225
09-04 53° 83° 8211 6200 4316 3000 2238
09-05 61° 86° 8262 6242 4347 3024 2257
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 58° 73° 8306 6276 4371 3039 2268
09-07 48° 66° 8342 6301 4386 3047 2270
09-08 45° 71° 8377 6327 4402 3055 2273
09-09 52° 79° 8421 6361 4426 3070 2283
09-10 51° 81° 8465 6395 4450 3087 2295
09-11 55° 86° 8514 6433 4479 3107 2310
09-12 59° 89° 8566 6475 4510 3131 2329
09-13 64° 86° 8618 6518 4543 3156 2349
09-14 65° 88° 8673 6563 4578 3182 2371
09-15 65° 89° 8728 6608 4613 3210 2393
09-16 61° 89° 8782 6651 4646 3235 2413
09-17 59° 85° 8832 6691 4676 3257 2430
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 57° 87° 8881 6731 4706 3279 2447
09-19 59° 89° 8934 6773 4738 3303 2466
09-20 70° 90° 8992 6821 4777 3333 2491
09-21 59° 92° 9046 6865 4810 3359 2512
09-22 64° 72° 9092 6901 4837 3377 2525
09-23 60° 66° 9133 6932 4858 3390 2533
09-24 61° 67° 9175 6965 4880 3404 2543
09-25 55° 74° 9218 6998 4903 3419 2552
09-26 53° 77° 9261 7031 4926 3435 2563
09-27 64° 72° 9307 7067 4952 3452 2576
09-28 65° 70° 9352 7102 4977 3470 2588
09-29 67° 72° 9400 7139 5005 3489 2602
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 76° 9447 7177 5032 3508 2616

 

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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