The GDD models have only been “ground-truthed” in the Great Lakes region. Use of models outside of this region, including the North East, Great Plains and Transition Zones, should be used with caution. We do not recommend the GDD models we use for the mid/southern transition zone and southern states.
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Daily GDD accumulation for various base temperature models in 2024 & 2023
2025 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
---|---|---|---|---|---|---|---|
02-15 | 14° | 21° | 0 | 0 | 0 | 0 | 0 |
02-16 | -2° | 13° | 0 | 0 | 0 | 0 | 0 |
02-17 | -15° | -2° | 0 | 0 | 0 | 0 | 0 |
02-18 | -19° | 2° | 0 | 0 | 0 | 0 | 0 |
02-19 | -13° | 6° | 0 | 0 | 0 | 0 | 0 |
02-20 | -6° | 12° | 0 | 0 | 0 | 0 | 0 |
02-21 | -3° | 19° | 0 | 0 | 0 | 0 | 0 |
02-22 | 11° | 30° | 0 | 0 | 0 | 0 | 0 |
02-23 | 22° | 39° | 9 | 0 | 0 | 0 | 0 |
02-24 | 29° | 42° | 23 | 4 | 0 | 0 | 0 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
---|---|---|---|---|---|---|---|
02-15 | 16° | 28° | 0 | 0 | 0 | 0 | 0 |
02-16 | 10° | 19° | 0 | 0 | 0 | 0 | 0 |
02-17 | 7° | 28° | 0 | 0 | 0 | 0 | 0 |
02-18 | 22° | 35° | 7 | 0 | 0 | 0 | 0 |
02-19 | 20° | 39° | 14 | 0 | 0 | 0 | 0 |
02-20 | 29° | 44° | 29 | 5 | 0 | 0 | 0 |
02-21 | 23° | 48° | 42 | 8 | 0 | 0 | 0 |
02-22 | 28° | 50° | 60 | 15 | 0 | 0 | 0 |
02-23 | 22° | 35° | 66 | 15 | 0 | 0 | 0 |
02-24 | 17° | 45° | 75 | 15 | 0 | 0 | 0 |
02-25 | 32° | 48° | 93 | 23 | 0 | 0 | 0 |
02-26 | 29° | 63° | 117 | 37 | 4 | 0 | 0 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
02-27 | 14° | 49° | 127 | 37 | 4 | 0 | 0 |
02-28 | 4° | 19° | 127 | 37 | 4 | 0 | 0 |
02-29 | 12° | 51° | 136 | 37 | 4 | 0 | 0 |
03-01 | 36° | 58° | 161 | 52 | 9 | 0 | 0 |
03-02 | 33° | 62° | 186 | 68 | 14 | 0 | 0 |
03-03 | 41° | 68° | 219 | 90 | 27 | 5 | 0 |
03-04 | 29° | 40° | 232 | 93 | 27 | 5 | 0 |
03-05 | 23° | 47° | 245 | 96 | 27 | 5 | 0 |
03-06 | 26° | 54° | 263 | 104 | 27 | 5 | 0 |
03-07 | 33° | 47° | 281 | 112 | 27 | 5 | 0 |
03-08 | 24° | 38° | 290 | 112 | 27 | 5 | 0 |
03-09 | 22° | 40° | 299 | 112 | 27 | 5 | 0 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
03-10 | 18° | 50° | 312 | 114 | 27 | 5 | 0 |
03-11 | 33° | 66° | 339 | 132 | 34 | 5 | 0 |
03-12 | 42° | 66° | 372 | 154 | 47 | 9 | 0 |
03-13 | 38° | 62° | 400 | 172 | 55 | 9 | 0 |
03-14 | 43° | 58° | 428 | 191 | 63 | 10 | 0 |
03-15 | 31° | 50° | 447 | 199 | 63 | 10 | 0 |
03-16 | 34° | 50° | 466 | 209 | 63 | 10 | 0 |
03-17 | 25° | 32° | 473 | 209 | 63 | 10 | 0 |
03-18 | 21° | 37° | 480 | 209 | 63 | 10 | 0 |
03-19 | 34° | 50° | 500 | 219 | 63 | 10 | 0 |
03-20 | 17° | 31° | 502 | 219 | 63 | 10 | 0 |
03-21 | 22° | 32° | 507 | 219 | 63 | 10 | 0 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
03-22 | 24° | 32° | 513 | 219 | 63 | 10 | 0 |
03-23 | 15° | 34° | 516 | 219 | 63 | 10 | 0 |
03-24 | 27° | 32° | 523 | 219 | 63 | 10 | 0 |
03-25 | 32° | 36° | 535 | 221 | 63 | 10 | 0 |
03-26 | 21° | 34° | 541 | 221 | 63 | 10 | 0 |
03-27 | 17° | 28° | 542 | 221 | 63 | 10 | 0 |
03-28 | 19° | 36° | 547 | 221 | 63 | 10 | 0 |
03-29 | 22° | 44° | 558 | 222 | 63 | 10 | 0 |
03-30 | 34° | 44° | 575 | 229 | 63 | 10 | 0 |
03-31 | 33° | 45° | 591 | 235 | 63 | 10 | 0 |
04-01 | 32° | 44° | 607 | 241 | 63 | 10 | 0 |
04-02 | 33° | 41° | 622 | 246 | 63 | 10 | 0 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
04-03 | 34° | 50° | 643 | 257 | 63 | 10 | 0 |
04-04 | 33° | 52° | 663 | 267 | 64 | 10 | 0 |
04-05 | 30° | 57° | 685 | 279 | 66 | 10 | 0 |
04-06 | 34° | 59° | 710 | 293 | 70 | 10 | 0 |
04-07 | 39° | 49° | 732 | 306 | 73 | 10 | 0 |
04-08 | 42° | 49° | 755 | 319 | 76 | 10 | 0 |
04-09 | 40° | 61° | 784 | 338 | 85 | 10 | 0 |
04-10 | 42° | 69° | 818 | 362 | 98 | 16 | 1 |
04-11 | 44° | 60° | 848 | 382 | 108 | 18 | 1 |
04-12 | 43° | 60° | 877 | 401 | 118 | 19 | 1 |
04-13 | 38° | 84° | 916 | 430 | 137 | 30 | 7 |
04-14 | 46° | 71° | 953 | 457 | 154 | 39 | 10 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
04-15 | 47° | 60° | 984 | 478 | 165 | 43 | 10 |
04-16 | 47° | 56° | 1014 | 498 | 175 | 44 | 10 |
04-17 | 44° | 53° | 1040 | 514 | 181 | 44 | 10 |
04-18 | 45° | 50° | 1066 | 530 | 187 | 44 | 10 |
04-19 | 33° | 39° | 1080 | 534 | 187 | 44 | 10 |
04-20 | 31° | 47° | 1097 | 541 | 187 | 44 | 10 |
04-21 | 32° | 53° | 1118 | 551 | 187 | 44 | 10 |
04-22 | 40° | 68° | 1150 | 574 | 199 | 48 | 10 |
04-23 | 44° | 60° | 1179 | 593 | 209 | 50 | 10 |
04-24 | 33° | 59° | 1203 | 607 | 213 | 50 | 10 |
04-25 | 44° | 68° | 1237 | 631 | 227 | 56 | 11 |
04-26 | 46° | 56° | 1266 | 650 | 236 | 57 | 11 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
04-27 | 49° | 57° | 1297 | 671 | 247 | 60 | 11 |
04-28 | 44° | 52° | 1323 | 687 | 252 | 60 | 11 |
04-29 | 43° | 49° | 1347 | 701 | 257 | 60 | 11 |
04-30 | 41° | 69° | 1380 | 724 | 270 | 65 | 11 |
05-01 | 49° | 64° | 1415 | 749 | 284 | 71 | 13 |
05-02 | 48° | 56° | 1445 | 769 | 295 | 74 | 13 |
05-03 | 45° | 69° | 1480 | 794 | 310 | 81 | 15 |
05-04 | 46° | 61° | 1512 | 816 | 321 | 84 | 15 |
05-05 | 41° | 69° | 1545 | 839 | 334 | 90 | 15 |
05-06 | 48° | 73° | 1584 | 868 | 353 | 100 | 21 |
05-07 | 57° | 71° | 1625 | 899 | 375 | 114 | 30 |
05-08 | 47° | 75° | 1664 | 928 | 394 | 125 | 35 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
05-09 | 48° | 65° | 1699 | 953 | 408 | 132 | 37 |
05-10 | 42° | 73° | 1735 | 979 | 424 | 139 | 40 |
05-11 | 45° | 75° | 1773 | 1007 | 443 | 150 | 45 |
05-12 | 59° | 85° | 1823 | 1047 | 473 | 172 | 62 |
05-13 | 51° | 70° | 1862 | 1076 | 491 | 182 | 68 |
05-14 | 48° | 71° | 1899 | 1103 | 509 | 192 | 72 |
05-15 | 48° | 73° | 1937 | 1131 | 527 | 202 | 78 |
05-16 | 56° | 70° | 1979 | 1162 | 548 | 215 | 86 |
05-17 | 54° | 84° | 2026 | 1200 | 575 | 234 | 100 |
05-18 | 64° | 80° | 2076 | 1240 | 605 | 257 | 117 |
05-19 | 50° | 71° | 2114 | 1268 | 624 | 267 | 123 |
05-20 | 57° | 76° | 2159 | 1303 | 648 | 284 | 134 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
05-21 | 62° | 72° | 2204 | 1338 | 673 | 301 | 146 |
05-22 | 53° | 69° | 2243 | 1367 | 693 | 312 | 152 |
05-23 | 55° | 78° | 2287 | 1401 | 717 | 328 | 163 |
05-24 | 51° | 71° | 2327 | 1431 | 736 | 339 | 170 |
05-25 | 47° | 74° | 2365 | 1459 | 755 | 350 | 175 |
05-26 | 58° | 69° | 2406 | 1490 | 776 | 363 | 183 |
05-27 | 50° | 65° | 2442 | 1515 | 791 | 370 | 186 |
05-28 | 53° | 64° | 2478 | 1542 | 808 | 379 | 189 |
05-29 | 47° | 70° | 2515 | 1569 | 824 | 387 | 193 |
05-30 | 55° | 77° | 2559 | 1603 | 849 | 404 | 204 |
05-31 | 62° | 69° | 2602 | 1636 | 872 | 419 | 214 |
06-01 | 60° | 75° | 2648 | 1672 | 898 | 437 | 227 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
06-02 | 56° | 76° | 2692 | 1706 | 922 | 453 | 239 |
06-03 | 63° | 81° | 2743 | 1747 | 952 | 475 | 256 |
06-04 | 62° | 85° | 2794 | 1788 | 984 | 499 | 274 |
06-05 | 56° | 79° | 2839 | 1823 | 1009 | 516 | 286 |
06-06 | 60° | 70° | 2883 | 1857 | 1032 | 531 | 297 |
06-07 | 57° | 77° | 2928 | 1892 | 1057 | 548 | 309 |
06-08 | 58° | 76° | 2973 | 1926 | 1082 | 565 | 321 |
06-09 | 57° | 71° | 3015 | 1959 | 1104 | 579 | 330 |
06-10 | 51° | 75° | 3055 | 1989 | 1125 | 592 | 337 |
06-11 | 56° | 82° | 3103 | 2027 | 1152 | 611 | 352 |
06-12 | 59° | 80° | 3150 | 2064 | 1180 | 631 | 366 |
06-13 | 63° | 84° | 3202 | 2106 | 1211 | 655 | 385 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
06-14 | 59° | 80° | 3249 | 2143 | 1239 | 674 | 399 |
06-15 | 62° | 71° | 3294 | 2178 | 1263 | 690 | 411 |
06-16 | 63° | 86° | 3346 | 2220 | 1296 | 715 | 430 |
06-17 | 56° | 77° | 3391 | 2255 | 1320 | 731 | 442 |
06-18 | 64° | 84° | 3443 | 2297 | 1352 | 755 | 461 |
06-19 | 62° | 73° | 3488 | 2332 | 1377 | 773 | 473 |
06-20 | 58° | 66° | 3528 | 2362 | 1398 | 785 | 480 |
06-21 | 64° | 71° | 3574 | 2398 | 1423 | 802 | 493 |
06-22 | 63° | 73° | 3619 | 2433 | 1449 | 820 | 505 |
06-23 | 54° | 83° | 3665 | 2469 | 1475 | 838 | 519 |
06-24 | 63° | 83° | 3716 | 2510 | 1506 | 861 | 536 |
06-25 | 72° | 85° | 3773 | 2557 | 1542 | 889 | 560 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
06-26 | 65° | 79° | 3823 | 2596 | 1572 | 911 | 577 |
06-27 | 57° | 74° | 3867 | 2630 | 1596 | 927 | 588 |
06-28 | 64° | 77° | 3915 | 2669 | 1625 | 948 | 603 |
06-29 | 61° | 70° | 3959 | 2703 | 1648 | 964 | 614 |
06-30 | 51° | 73° | 3999 | 2733 | 1669 | 976 | 621 |
07-01 | 58° | 76° | 4044 | 2768 | 1693 | 992 | 633 |
07-02 | 60° | 73° | 4088 | 2802 | 1718 | 1009 | 644 |
07-03 | 64° | 85° | 4141 | 2845 | 1750 | 1033 | 664 |
07-04 | 63° | 69° | 4185 | 2879 | 1774 | 1050 | 675 |
07-05 | 62° | 76° | 4232 | 2916 | 1801 | 1069 | 689 |
07-06 | 59° | 81° | 4280 | 2954 | 1829 | 1089 | 704 |
07-07 | 62° | 80° | 4329 | 2993 | 1859 | 1110 | 720 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
07-08 | 65° | 79° | 4380 | 3033 | 1889 | 1132 | 738 |
07-09 | 63° | 83° | 4431 | 3075 | 1921 | 1156 | 756 |
07-10 | 66° | 80° | 4482 | 3116 | 1951 | 1179 | 774 |
07-11 | 63° | 85° | 4534 | 3157 | 1983 | 1202 | 793 |
07-12 | 68° | 87° | 4589 | 3203 | 2019 | 1230 | 815 |
07-13 | 70° | 81° | 4643 | 3247 | 2052 | 1256 | 836 |
07-14 | 67° | 88° | 4698 | 3292 | 2088 | 1283 | 858 |
07-15 | 69° | 84° | 4752 | 3336 | 2122 | 1309 | 880 |
07-16 | 63° | 80° | 4802 | 3376 | 2152 | 1331 | 896 |
07-17 | 59° | 75° | 4847 | 3411 | 2177 | 1348 | 908 |
07-18 | 58° | 79° | 4893 | 3447 | 2203 | 1366 | 921 |
07-19 | 61° | 80° | 4942 | 3486 | 2232 | 1387 | 937 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
07-20 | 68° | 82° | 4995 | 3529 | 2264 | 1412 | 957 |
07-21 | 68° | 79° | 5046 | 3570 | 2296 | 1435 | 975 |
07-22 | 66° | 84° | 5100 | 3613 | 2329 | 1460 | 996 |
07-23 | 64° | 74° | 5147 | 3651 | 2356 | 1479 | 1010 |
07-24 | 61° | 76° | 5193 | 3687 | 2383 | 1498 | 1023 |
07-25 | 58° | 82° | 5241 | 3725 | 2411 | 1518 | 1038 |
07-26 | 67° | 85° | 5295 | 3769 | 2445 | 1544 | 1059 |
07-27 | 72° | 91° | 5355 | 3819 | 2484 | 1576 | 1086 |
07-28 | 72° | 90° | 5414 | 3868 | 2524 | 1607 | 1112 |
07-29 | 70° | 87° | 5470 | 3914 | 2560 | 1635 | 1135 |
07-30 | 71° | 88° | 5528 | 3962 | 2597 | 1665 | 1160 |
07-31 | 71° | 90° | 5587 | 4011 | 2636 | 1695 | 1186 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
08-01 | 66° | 75° | 5636 | 4049 | 2665 | 1716 | 1202 |
08-02 | 65° | 91° | 5692 | 4096 | 2701 | 1744 | 1225 |
08-03 | 61° | 85° | 5743 | 4137 | 2733 | 1768 | 1243 |
08-04 | 68° | 82° | 5796 | 4180 | 2766 | 1793 | 1263 |
08-05 | 59° | 73° | 5840 | 4214 | 2790 | 1809 | 1274 |
08-06 | 56° | 76° | 5884 | 4248 | 2813 | 1825 | 1285 |
08-07 | 57° | 75° | 5928 | 4282 | 2838 | 1841 | 1296 |
08-08 | 60° | 69° | 5971 | 4314 | 2860 | 1855 | 1306 |
08-09 | 56° | 69° | 6011 | 4345 | 2880 | 1868 | 1313 |
08-10 | 53° | 73° | 6052 | 4376 | 2901 | 1881 | 1321 |
08-11 | 53° | 78° | 6095 | 4409 | 2925 | 1896 | 1331 |
08-12 | 54° | 81° | 6141 | 4444 | 2950 | 1913 | 1344 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
08-13 | 58° | 82° | 6188 | 4482 | 2978 | 1933 | 1359 |
08-14 | 63° | 80° | 6238 | 4522 | 3008 | 1955 | 1375 |
08-15 | 65° | 78° | 6288 | 4561 | 3037 | 1976 | 1392 |
08-16 | 65° | 77° | 6337 | 4601 | 3066 | 1997 | 1408 |
08-17 | 67° | 76° | 6386 | 4640 | 3096 | 2019 | 1425 |
08-18 | 62° | 82° | 6436 | 4680 | 3126 | 2041 | 1441 |
08-19 | 59° | 81° | 6484 | 4718 | 3154 | 2061 | 1456 |
08-20 | 61° | 75° | 6530 | 4754 | 3180 | 2079 | 1469 |
08-21 | 60° | 78° | 6577 | 4791 | 3207 | 2098 | 1483 |
08-22 | 61° | 71° | 6621 | 4825 | 3231 | 2114 | 1494 |
08-23 | 64° | 79° | 6671 | 4865 | 3260 | 2136 | 1511 |
08-24 | 64° | 86° | 6724 | 4908 | 3293 | 2161 | 1531 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
08-25 | 73° | 84° | 6781 | 4955 | 3330 | 2189 | 1555 |
08-26 | 70° | 93° | 6840 | 5004 | 3370 | 2221 | 1581 |
08-27 | 68° | 76° | 6891 | 5044 | 3400 | 2243 | 1599 |
08-28 | 62° | 72° | 6936 | 5080 | 3425 | 2260 | 1611 |
08-29 | 65° | 87° | 6990 | 5124 | 3460 | 2287 | 1632 |
08-30 | 60° | 79° | 7037 | 5161 | 3487 | 2306 | 1646 |
08-31 | 59° | 84° | 7087 | 5201 | 3516 | 2328 | 1663 |
09-01 | 56° | 72° | 7129 | 5233 | 3539 | 2342 | 1672 |
09-02 | 52° | 75° | 7171 | 5265 | 3560 | 2355 | 1681 |
09-03 | 58° | 78° | 7217 | 5301 | 3586 | 2373 | 1694 |
09-04 | 59° | 82° | 7265 | 5339 | 3615 | 2394 | 1709 |
09-05 | 63° | 74° | 7312 | 5376 | 3641 | 2413 | 1723 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
09-06 | 52° | 67° | 7350 | 5403 | 3659 | 2422 | 1728 |
09-07 | 46° | 69° | 7385 | 5429 | 3675 | 2430 | 1730 |
09-08 | 53° | 78° | 7429 | 5463 | 3698 | 2446 | 1741 |
09-09 | 56° | 82° | 7476 | 5500 | 3726 | 2465 | 1755 |
09-10 | 63° | 81° | 7526 | 5540 | 3755 | 2486 | 1772 |
09-11 | 62° | 84° | 7577 | 5581 | 3786 | 2510 | 1790 |
09-12 | 60° | 85° | 7627 | 5621 | 3817 | 2532 | 1808 |
09-13 | 62° | 83° | 7678 | 5662 | 3848 | 2555 | 1825 |
09-14 | 68° | 75° | 7728 | 5701 | 3877 | 2576 | 1842 |
09-15 | 67° | 87° | 7783 | 5746 | 3912 | 2603 | 1864 |
09-16 | 68° | 87° | 7838 | 5792 | 3948 | 2631 | 1886 |
09-17 | 70° | 87° | 7895 | 5839 | 3984 | 2660 | 1910 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
09-18 | 69° | 84° | 7949 | 5883 | 4019 | 2686 | 1931 |
09-19 | 69° | 85° | 8004 | 5928 | 4053 | 2713 | 1953 |
09-20 | 60° | 81° | 8053 | 5967 | 4082 | 2733 | 1969 |
09-21 | 63° | 81° | 8102 | 6006 | 4112 | 2755 | 1985 |
09-22 | 52° | 69° | 8141 | 6035 | 4130 | 2766 | 1991 |
09-23 | 44° | 70° | 8176 | 6060 | 4145 | 2773 | 1993 |
09-24 | 54° | 73° | 8217 | 6091 | 4167 | 2786 | 2002 |
09-25 | 52° | 79° | 8261 | 6125 | 4191 | 2802 | 2012 |
09-26 | 55° | 83° | 8308 | 6162 | 4217 | 2821 | 2026 |
09-27 | 55° | 84° | 8355 | 6199 | 4245 | 2840 | 2040 |
09-28 | 57° | 85° | 8404 | 6238 | 4274 | 2861 | 2056 |
09-29 | 54° | 83° | 8451 | 6275 | 4300 | 2879 | 2070 |
2024 | Lo (F) | Hi (F) | GDD 22 | GDD 32 | GDD 42 | GDD 50 | GDD 55 |
09-30 | 60° | 84° | 8501 | 6315 | 4330 | 2902 | 2087 |
Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.