Please Note

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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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Mon, Oct. 26. 2026

 
  

Apple Valley, MN

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 30° 52° 19 9 0 0 0
02-16 36° 55° 43 23 4 0 0
02-17 37° 49° 63 33 4 0 0
02-18 27° 43° 77 37 4 0 0
02-19 23° 32° 82 37 4 0 0
02-20 16° 31° 84 37 4 0 0
02-21 7° 17° 84 37 4 0 0
02-22 5° 14° 84 37 4 0 0
02-23 0° 20° 84 37 4 0 0
02-24 16° 36° 87 37 4 0 0
02-25 8° 21° 87 37 4 0 0
02-26 12° 39° 91 37 4 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 27° 49° 107 43 4 0 0
02-28 17° 24° 107 43 4 0 0
03-01 13° 27° 107 43 4 0 0
03-02 18° 39° 114 43 4 0 0
03-03 34° 47° 132 51 4 0 0
03-04 30° 47° 149 58 4 0 0
03-05 39° 52° 172 71 8 0 0
03-06 44° 52° 198 87 13 0 0
03-07 26° 41° 209 88 13 0 0
03-08 36° 57° 234 103 18 0 0
03-09 43° 58° 263 122 27 1 0
03-10 33° 42° 278 127 27 1 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 27° 40° 290 129 27 1 0
03-12 24° 41° 301 130 27 1 0
03-13 29° 45° 316 135 27 1 0
03-14 24° 32° 322 135 27 1 0
03-15 22° 30° 326 135 27 1 0
03-16 4° 19° 326 135 27 1 0
03-17 -3° 18° 326 135 27 1 0
03-18 18° 43° 334 135 27 1 0
03-19 24° 50° 349 139 27 1 0
03-20 43° 60° 379 159 36 2 0
03-21 45° 74° 416 186 54 12 5
03-22 33° 49° 436 196 54 12 5
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 25° 44° 448 198 54 12 5
03-24 36° 51° 469 210 55 12 5
03-25 41° 71° 503 233 69 18 6
03-26 35° 55° 526 246 71 18 6
03-27 25° 36° 535 246 71 18 6
03-28 18° 58° 551 252 71 18 6
03-29 41° 69° 584 276 85 23 6
03-30 40° 75° 620 301 101 31 9
03-31 34° 53° 642 313 103 31 9
04-01 31° 43° 657 318 103 31 9
04-02 31° 37° 669 321 103 31 9
04-03 32° 40° 683 324 103 31 9
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 37° 696 328 103 31 9
04-05 30° 52° 715 337 103 31 9
04-06 29° 40° 728 339 103 31 9
04-07 20° 43° 737 339 103 31 9
04-08 37° 62° 765 357 110 31 9
04-09 34° 47° 783 365 110 31 9
04-10 33° 54° 805 377 112 31 9
04-11 35° 49° 825 387 112 31 9
04-12 50° 78° 867 419 134 45 18
04-13 52° 75° 909 451 156 58 26
04-14 49° 66° 944 476 171 66 29
04-15 44° 69° 979 501 186 72 30
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 44° 78° 1018 530 205 84 37
04-17 40° 68° 1050 552 217 88 37
04-18 29° 46° 1066 558 217 88 37
04-19 33° 46° 1083 565 217 88 37
04-20 28° 63° 1107 579 221 88 37
04-21 43° 77° 1145 607 239 98 42
04-22 49° 86° 1190 642 264 115 54
04-23 61° 73° 1235 677 289 132 66
04-24 42° 62° 1265 697 299 134 66
04-25 45° 56° 1293 715 307 134 66
04-26 45° 65° 1326 738 320 139 66
04-27 45° 58° 1356 758 330 141 66
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 40° 55° 1382 774 335 141 66
04-29 37° 53° 1405 787 339 141 66
04-30 35° 51° 1426 798 340 141 66
05-01 38° 53° 1449 812 343 141 66
05-02 36° 65° 1478 830 352 142 66
05-03 52° 70° 1517 859 371 153 72
05-04 45° 63° 1549 881 383 156 72
05-05 37° 50° 1570 892 384 156 72
05-06 32° 45° 1587 899 384 156 72
05-07 31° 58° 1610 912 387 156 72
05-08 42° 70° 1644 936 401 163 73
05-09 50° 61° 1677 959 414 168 73
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 39° 60° 1705 977 422 168 73
05-11 36° 68° 1735 997 432 170 73
05-12 57° 70° 1777 1029 454 184 82
05-13 44° 71° 1812 1054 469 191 85
05-14 49° 78° 1854 1086 491 205 93
05-15 59° 87° 1905 1127 522 228 111
05-16 55° 79° 1949 1162 547 245 123
05-17 54° 71° 1990 1192 567 257 131
05-18 53° 65° 2027 1219 584 266 135
05-19 47° 59° 2058 1241 595 270 135
05-20 39° 59° 2085 1258 602 270 135
05-21 45° 64° 2118 1280 615 274 135
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 49° 64° 2152 1305 629 281 136
05-23 53° 64° 2189 1331 646 289 140
05-24 47° 82° 2232 1364 669 304 149
05-25 60° 85° 2282 1404 699 326 167
05-26 68° 87° 2338 1450 735 354 189
05-27 64° 88° 2392 1494 769 380 211
05-28 62° 83° 2443 1535 800 403 229
05-29 63° 85° 2495 1577 832 427 247
05-30 63° 82° 2545 1618 863 450 265
05-31 60° 69° 2588 1650 885 464 275
06-01 59° 78° 2634 1687 912 483 288
06-02 56° 82° 2682 1724 939 502 302
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 63° 83° 2733 1765 970 525 320
06-04 66° 81° 2784 1806 1001 548 339
06-05 63° 82° 2835 1847 1032 571 356
06-06 61° 84° 2885 1887 1062 593 374
06-07 67° 87° 2940 1932 1097 620 396
06-08 70° 82° 2994 1976 1131 646 417
06-09 68° 87° 3049 2022 1166 674 439
06-10 69° 89° 3107 2069 1204 703 464
06-11 60° 73° 3151 2103 1228 719 475
06-12 57° 80° 3198 2140 1255 738 489
06-13 60° 74° 3243 2175 1280 755 500
06-14 57° 73° 3285 2208 1303 770 510
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 51° 77° 3327 2240 1325 784 519
06-16 54° 72° 3369 2271 1346 797 528
06-17 57° 68° 3410 2302 1367 810 536
06-18 57° 70° 3451 2333 1388 823 544
06-19 51° 74° 3491 2364 1409 836 551
06-20 54° 73° 3533 2395 1430 849 560
06-21 54° 73° 3575 2427 1452 863 568
06-22 57° 76° 3619 2461 1476 879 580
06-23 59° 76° 3665 2497 1502 897 592
06-24 58° 75° 3710 2532 1527 914 604
06-25 57° 71° 3752 2564 1549 928 614
06-26 57° 77° 3797 2599 1574 945 625
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 60° 79° 3844 2636 1601 964 640
06-28 66° 80° 3895 2677 1632 987 658
06-29 74° 90° 3955 2727 1672 1019 685
06-30 71° 88° 4013 2775 1710 1049 709
07-01 68° 82° 4066 2818 1743 1074 730
07-02 68° 80° 4118 2860 1775 1098 749
07-03 70° 84° 4173 2905 1810 1125 771
07-04 67° 84° 4226 2949 1843 1151 791
07-05 65° 84° 4279 2991 1876 1175 810
07-06 67° 85° 4333 3035 1910 1201 832
07-07 65° 81° 4384 3076 1941 1224 850
07-08 71° 79° 4437 3119 1974 1249 869
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 69° 81° 4490 3162 2007 1274 890
07-10 63° 85° 4542 3204 2039 1298 909
07-11 67° 87° 4597 3249 2074 1325 931
07-12 71° 88° 4654 3296 2111 1354 955
07-13 69° 90° 4712 3344 2149 1384 979
07-14 69° 91° 4769 3392 2187 1414 1004
07-15 71° 92° 4829 3441 2226 1445 1031
07-16 72° 92° 4889 3491 2266 1477 1058
07-17 74° 92° 4950 3542 2307 1510 1086
07-18 71° 87° 5007 3589 2344 1539 1110
07-19 65° 86° 5061 3633 2378 1565 1131
07-20 70° 89° 5118 3680 2415 1594 1155
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 67° 77° 5169 3721 2446 1617 1172
07-22 59° 71° 5211 3754 2468 1632 1182
07-23 53° 77° 5255 3787 2492 1647 1192
07-24 65° 79° 5304 3826 2521 1668 1209
07-25 69° 83° 5358 3871 2555 1695 1230
07-26 73° 93° 5419 3922 2596 1728 1258
07-27 80° 95° 5485 3977 2642 1765 1290
07-28 68° 87° 5540 4022 2677 1792 1313
07-29 69° 89° 5598 4070 2715 1822 1337
07-30 72° 85° 5654 4116 2751 1850 1361
07-31 65° 75° 5702 4154 2779 1870 1376
08-01 63° 84° 5754 4196 2811 1894 1395
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 62° 84° 5805 4237 2842 1917 1413
08-03 66° 84° 5858 4280 2875 1942 1433
08-04 63° 74° 5904 4317 2902 1961 1446
08-05 58° 78° 5951 4353 2928 1979 1459
08-06 57° 80° 5997 4389 2954 1997 1473
08-07 66° 77° 6046 4429 2984 2019 1489
08-08 57° 79° 6092 4465 3009 2037 1502
08-09 66° 87° 6147 4509 3044 2063 1524
08-10 68° 85° 6201 4553 3078 2089 1545
08-11 71° 86° 6257 4600 3114 2118 1568
08-12 71° 87° 6314 4646 3151 2146 1592
08-13 71° 79° 6367 4689 3184 2171 1612
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 66° 79° 6418 4730 3215 2194 1629
08-15 68° 80° 6470 4772 3247 2218 1649
08-16 67° 80° 6521 4813 3278 2241 1667
08-17 59° 82° 6570 4852 3307 2262 1683
08-18 66° 82° 6621 4894 3338 2286 1701
08-19 57° 80° 6668 4930 3365 2304 1715
08-20 57° 77° 6713 4965 3390 2321 1727
08-21 67° 80° 6765 5007 3422 2345 1745
08-22 62° 78° 6813 5045 3450 2365 1761
08-23 53° 78° 6856 5078 3473 2380 1771
08-24 57° 81° 6903 5116 3501 2400 1785
08-25 66° 80° 6955 5157 3532 2423 1803
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 64° 80° 7004 5197 3561 2445 1820
08-27 59° 80° 7052 5234 3589 2464 1835
08-28 54° 81° 7097 5270 3614 2482 1847
08-29 67° 81° 7149 5312 3646 2506 1866
08-30 67° 88° 7205 5357 3682 2533 1889
08-31 71° 91° 7264 5406 3721 2564 1915
09-01 63° 87° 7317 5449 3754 2589 1934
09-02 65° 86° 7370 5492 3787 2614 1955
09-03 72° 88° 7428 5540 3825 2644 1980
09-04 72° 86° 7485 5587 3862 2673 2004
09-05 66° 82° 7537 5629 3894 2697 2023
09-06 67° 77° 7587 5669 3924 2719 2040
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 67° 82° 7640 5712 3957 2744 2059
09-08 67° 82° 7692 5754 3989 2768 2079
09-09 61° 79° 7740 5792 4017 2788 2094
09-10 55° 80° 7785 5827 4042 2805 2106
09-11 62° 85° 7837 5869 4074 2829 2124
09-12 61° 74° 7882 5904 4099 2846 2137
09-13 51° 70° 7921 5933 4118 2857 2143
09-14 48° 61° 7954 5956 4131 2862 2143
09-15 56° 71° 7995 5987 4152 2875 2151
09-16 49° 74° 8035 6017 4172 2887 2158
09-17 57° 70° 8076 6049 4193 2901 2166
09-18 58° 63° 8115 6077 4212 2911 2172
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 56° 61° 8152 6104 4229 2920 2176
09-20 57° 63° 8190 6132 4247 2930 2181
09-21 50° 62° 8224 6156 4261 2936 2182
09-22 49° 64° 8258 6180 4275 2942 2183
09-23 47° 68° 8294 6206 4291 2950 2186
09-24 54° 67° 8332 6235 4310 2961 2192
09-25 57° 69° 8374 6266 4331 2974 2200
09-26 58° 62° 8411 6294 4348 2984 2204
09-27 58° 66° 8451 6323 4368 2995 2211
09-28 56° 72° 8493 6356 4391 3010 2221
09-29 60° 67° 8535 6387 4412 3023 2229
09-30 62° 72° 8580 6422 4437 3040 2241
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 15° 21° 0 0 0 0 0
02-16 1° 14° 0 0 0 0 0
02-17 -16° -1° 0 0 0 0 0
02-18 -16° 4° 0 0 0 0 0
02-19 -10° 7° 0 0 0 0 0
02-20 -1° 18° 0 0 0 0 0
02-21 2° 25° 0 0 0 0 0
02-22 11° 37° 2 0 0 0 0
02-23 30° 52° 21 9 0 0 0
02-24 40° 50° 44 22 3 0 0
02-25 29° 50° 61 29 3 0 0
02-26 37° 54° 85 43 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 49° 104 52 7 0 0
02-28 25° 44° 117 55 7 0 0
03-01 13° 25° 117 55 7 0 0
03-02 13° 42° 123 55 7 0 0
03-03 29° 57° 144 66 8 0 0
03-04 32° 49° 162 75 8 0 0
03-05 23° 32° 168 75 8 0 0
03-06 12° 38° 171 75 8 0 0
03-07 23° 40° 181 75 8 0 0
03-08 26° 47° 195 79 8 0 0
03-09 32° 56° 217 91 9 0 0
03-10 36° 58° 242 106 15 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 29° 50° 260 113 15 0 0
03-12 31° 56° 281 125 16 0 0
03-13 33° 60° 306 140 21 0 0
03-14 49° 74° 346 169 41 12 7
03-15 27° 52° 363 177 41 12 7
03-16 18° 36° 368 177 41 12 7
03-17 31° 61° 392 191 45 12 7
03-18 35° 50° 413 202 45 12 7
03-19 33° 38° 426 205 45 12 7
03-20 25° 45° 439 208 45 12 7
03-21 31° 53° 459 218 45 12 7
03-22 18° 44° 468 218 45 12 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 30° 44° 483 223 45 12 7
03-24 23° 48° 497 227 45 12 7
03-25 26° 52° 514 234 45 12 7
03-26 30° 54° 534 244 45 12 7
03-27 39° 61° 562 262 54 12 7
03-28 45° 75° 600 290 72 22 12
03-29 34° 45° 617 297 72 22 12
03-30 31° 35° 628 298 72 22 12
03-31 27° 44° 642 302 72 22 12
04-01 30° 40° 655 305 72 22 12
04-02 32° 38° 668 308 72 22 12
04-03 34° 43° 684 314 72 22 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 29° 50° 702 322 72 22 12
04-05 31° 43° 717 327 72 22 12
04-06 26° 59° 737 337 72 22 12
04-07 26° 45° 751 341 72 22 12
04-08 21° 49° 764 344 72 22 12
04-09 35° 61° 790 360 78 22 12
04-10 40° 51° 814 374 82 22 12
04-11 40° 55° 840 390 88 22 12
04-12 38° 68° 871 411 99 25 12
04-13 53° 66° 909 439 117 35 17
04-14 42° 57° 936 456 124 35 17
04-15 37° 54° 960 470 128 35 17
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 33° 60° 985 485 133 35 17
04-17 49° 72° 1023 513 151 46 22
04-18 46° 58° 1053 533 161 48 22
04-19 34° 54° 1075 546 163 48 22
04-20 36° 53° 1098 558 166 48 22
04-21 39° 60° 1126 576 174 48 22
04-22 50° 69° 1163 604 191 57 27
04-23 48° 67° 1199 629 207 65 29
04-24 46° 53° 1226 647 214 65 29
04-25 43° 56° 1254 664 222 65 29
04-26 36° 60° 1281 681 229 65 29
04-27 50° 64° 1316 706 244 72 31
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 57° 71° 1357 738 265 86 40
04-29 42° 59° 1386 756 274 86 40
04-30 38° 68° 1417 777 285 89 40
05-01 52° 61° 1451 802 299 96 42
05-02 45° 52° 1478 818 306 96 42
05-03 43° 65° 1510 840 318 99 42
05-04 46° 79° 1550 870 338 112 49
05-05 52° 75° 1592 902 360 125 58
05-06 50° 82° 1636 936 384 141 69
05-07 55° 71° 1677 967 405 154 77
05-08 46° 70° 1713 993 421 162 80
05-09 47° 84° 1756 1026 444 178 90
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 54° 74° 1798 1058 466 192 99
05-11 57° 89° 1849 1099 497 215 117
05-12 57° 86° 1899 1139 527 236 134
05-13 61° 85° 1950 1180 558 259 152
05-14 62° 85° 2002 1222 590 283 171
05-15 60° 80° 2050 1260 618 303 186
05-16 49° 61° 2083 1283 631 308 186
05-17 43° 49° 2107 1297 635 308 186
05-18 44° 60° 2137 1317 645 310 186
05-19 41° 58° 2164 1334 652 310 186
05-20 42° 49° 2187 1347 655 310 186
05-21 44° 49° 2212 1362 660 310 186
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 64° 2243 1383 671 313 186
05-23 44° 64° 2275 1405 683 317 186
05-24 44° 65° 2308 1428 696 322 186
05-25 44° 70° 2343 1453 711 328 188
05-26 46° 72° 2379 1479 727 337 191
05-27 56° 63° 2417 1507 745 347 196
05-28 54° 60° 2452 1532 760 354 198
05-29 52° 71° 2492 1562 780 366 205
05-30 57° 76° 2536 1596 804 382 216
05-31 57° 81° 2583 1633 831 401 230
06-01 53° 80° 2628 1668 856 418 242
06-02 64° 90° 2683 1713 891 445 264
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 54° 71° 2723 1743 911 457 271
06-04 51° 75° 2764 1774 932 470 279
06-05 53° 77° 2807 1807 955 485 289
06-06 61° 72° 2852 1842 980 502 301
06-07 57° 75° 2896 1876 1004 518 312
06-08 59° 71° 2938 1909 1026 532 321
06-09 51° 66° 2975 1935 1043 541 325
06-10 58° 82° 3023 1973 1071 561 340
06-11 63° 75° 3070 2010 1098 580 354
06-12 58° 70° 3112 2042 1120 593 363
06-13 53° 59° 3145 2065 1133 599 363
06-14 54° 62° 3181 2092 1149 607 366
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 58° 74° 3226 2126 1174 624 378
06-16 66° 80° 3277 2167 1205 647 396
06-17 63° 81° 3327 2207 1235 669 413
06-18 62° 81° 3377 2247 1265 691 430
06-19 61° 87° 3429 2289 1297 714 449
06-20 68° 86° 3483 2333 1331 741 470
06-21 80° 96° 3549 2389 1377 779 503
06-22 81° 94° 3614 2445 1422 816 535
06-23 73° 87° 3672 2493 1460 846 560
06-24 64° 79° 3722 2532 1490 868 577
06-25 65° 72° 3769 2569 1517 887 591
06-26 62° 65° 3810 2600 1538 900 599
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 60° 71° 3854 2634 1562 916 610
06-28 63° 84° 3905 2675 1593 939 628
06-29 68° 81° 3958 2718 1626 964 648
06-30 65° 79° 4008 2758 1656 986 665
07-01 63° 84° 4060 2800 1688 1010 684
07-02 65° 88° 4115 2845 1723 1037 706
07-03 70° 90° 4173 2893 1761 1066 731
07-04 79° 91° 4235 2946 1803 1101 760
07-05 72° 83° 4291 2991 1839 1128 783
07-06 69° 83° 4345 3035 1873 1155 804
07-07 64° 83° 4396 3076 1904 1178 822
07-08 65° 83° 4448 3119 1936 1202 841
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 64° 84° 4500 3161 1968 1226 860
07-10 69° 80° 4553 3203 2001 1251 880
07-11 68° 83° 4607 3247 2035 1276 901
07-12 67° 77° 4656 3286 2064 1298 917
07-13 60° 85° 4707 3327 2095 1321 935
07-14 68° 89° 4763 3373 2131 1349 958
07-15 73° 90° 4823 3423 2171 1381 985
07-16 57° 72° 4865 3455 2193 1395 994
07-17 51° 72° 4905 3485 2213 1407 1001
07-18 58° 74° 4949 3519 2237 1423 1012
07-19 68° 80° 5001 3561 2269 1447 1031
07-20 59° 80° 5048 3599 2296 1466 1045
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 62° 80° 5098 3638 2326 1488 1062
07-22 74° 88° 5157 3687 2365 1519 1088
07-23 73° 81° 5212 3732 2400 1546 1110
07-24 70° 83° 5266 3776 2434 1572 1131
07-25 65° 85° 5320 3820 2468 1597 1152
07-26 68° 87° 5375 3866 2503 1625 1174
07-27 70° 91° 5434 3914 2542 1656 1200
07-28 67° 87° 5489 3959 2577 1683 1222
07-29 66° 85° 5543 4003 2611 1709 1243
07-30 71° 80° 5596 4047 2644 1734 1263
07-31 58° 76° 5642 4082 2670 1752 1276
08-01 60° 77° 5688 4118 2696 1770 1289
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 58° 77° 5733 4153 2721 1787 1301
08-03 60° 77° 5779 4190 2747 1805 1314
08-04 65° 77° 5829 4229 2777 1826 1331
08-05 61° 80° 5877 4267 2805 1847 1346
08-06 68° 81° 5930 4310 2838 1872 1366
08-07 69° 85° 5985 4355 2873 1899 1388
08-08 72° 88° 6043 4403 2911 1929 1413
08-09 72° 83° 6099 4449 2947 1957 1436
08-10 68° 81° 6151 4491 2979 1981 1455
08-11 62° 79° 6200 4530 3008 2002 1471
08-12 67° 81° 6252 4572 3040 2026 1490
08-13 60° 82° 6301 4611 3069 2047 1506
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 67° 76° 6350 4651 3098 2068 1522
08-15 69° 87° 6407 4697 3135 2096 1546
08-16 70° 82° 6461 4741 3169 2123 1567
08-17 70° 80° 6514 4784 3202 2148 1587
08-18 70° 81° 6568 4828 3236 2174 1608
08-19 70° 86° 6624 4874 3272 2202 1631
08-20 66° 83° 6676 4916 3304 2226 1650
08-21 65° 83° 6728 4958 3336 2250 1669
08-22 69° 77° 6779 5000 3367 2273 1687
08-23 59° 70° 6822 5032 3390 2288 1697
08-24 57° 67° 6862 5062 3410 2299 1704
08-25 51° 70° 6900 5090 3428 2310 1709
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 55° 73° 6942 5122 3450 2324 1718
08-27 54° 76° 6985 5155 3473 2339 1728
08-28 57° 79° 7032 5192 3500 2358 1742
08-29 61° 77° 7078 5229 3526 2376 1755
08-30 60° 76° 7124 5264 3552 2394 1768
08-31 53° 77° 7168 5298 3576 2410 1779
09-01 60° 78° 7215 5335 3603 2429 1793
09-02 59° 73° 7259 5369 3627 2444 1804
09-03 51° 66° 7295 5395 3643 2453 1807
09-04 44° 60° 7325 5415 3653 2455 1807
09-05 45° 58° 7355 5435 3663 2457 1807
09-06 45° 58° 7385 5455 3673 2459 1807
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 42° 64° 7416 5476 3684 2462 1807
09-08 48° 78° 7457 5507 3705 2475 1815
09-09 62° 67° 7499 5539 3727 2489 1825
09-10 57° 74° 7543 5573 3751 2505 1836
09-11 58° 77° 7589 5609 3777 2523 1848
09-12 61° 82° 7638 5649 3806 2544 1865
09-13 65° 82° 7690 5690 3838 2568 1884
09-14 68° 87° 7745 5735 3873 2595 1906
09-15 72° 83° 7801 5781 3909 2623 1928
09-16 68° 90° 7858 5828 3946 2652 1953
09-17 64° 80° 7908 5868 3976 2674 1970
09-18 64° 81° 7959 5909 4007 2697 1987
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 65° 72° 8005 5945 4033 2715 2001
09-20 59° 71° 8049 5979 4057 2730 2011
09-21 63° 77° 8097 6017 4085 2750 2026
09-22 61° 74° 8142 6052 4110 2768 2039
09-23 56° 74° 8185 6085 4133 2783 2048
09-24 55° 75° 8228 6118 4156 2798 2058
09-25 54° 82° 8274 6154 4182 2816 2071
09-26 56° 79° 8320 6190 4208 2833 2084
09-27 55° 75° 8362 6222 4230 2848 2094
09-28 47° 79° 8403 6253 4251 2861 2102
09-29 54° 86° 8451 6291 4279 2881 2117
09-30 65° 83° 8503 6333 4311 2905 2136
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2026Welcome to the 2026 GDD Tracking Season

Although Punxsutawney Phil saw his shadow predicting six more weeks of winter, GDDTracker will start 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. As spring turns to summer, 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 2026!


 

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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