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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Early Season Fungicide App for Dollar Spot Suppression (GDD 50)
through Sat, Dec. 6. 2025

 
  

Minneapolis, MN

        

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 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 -15° 4° 0 0 0 0 0
02-19 -11° 8° 0 0 0 0 0
02-20 1° 21° 0 0 0 0 0
02-21 3° 28° 0 0 0 0 0
02-22 11° 37° 2 0 0 0 0
02-23 30° 49° 20 7 0 0 0
02-24 41° 53° 44 22 5 0 0
02-25 29° 51° 63 30 5 0 0
02-26 37° 55° 87 45 9 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 49° 106 54 9 0 0
02-28 25° 47° 120 58 9 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 12° 25° 120 58 9 0 0
03-02 13° 42° 126 58 9 0 0
03-03 29° 48° 142 65 9 0 0
03-04 32° 45° 159 71 9 0 0
03-05 25° 32° 165 71 9 0 0
03-06 15° 40° 171 71 9 0 0
03-07 26° 43° 183 74 9 0 0
03-08 29° 52° 202 82 9 0 0
03-09 32° 61° 226 97 13 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 36° 65° 254 115 22 0 0
03-11 28° 51° 272 123 22 0 0
03-12 32° 58° 295 135 24 0 0
03-13 31° 63° 320 151 30 0 0
03-14 51° 75° 361 182 51 14 8
03-15 27° 54° 380 190 51 14 8
03-16 18° 39° 386 190 51 14 8
03-17 31° 62° 411 205 56 14 8
03-18 34° 49° 430 214 56 14 8
03-19 33° 38° 443 218 56 14 8
03-20 26° 47° 458 222 56 14 8
03-21 31° 50° 476 231 56 14 8
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 17° 42° 484 231 56 14 8
03-23 30° 45° 499 236 56 14 8
03-24 24° 47° 512 239 56 14 8
03-25 28° 52° 530 247 56 14 8
03-26 30° 54° 550 257 56 14 8
03-27 40° 61° 579 276 64 14 8
03-28 43° 71° 614 301 79 21 10
03-29 33° 40° 628 305 79 21 10
03-30 31° 33° 638 305 79 21 10
03-31 25° 44° 651 307 79 21 10
04-01 30° 38° 663 310 79 21 10
04-02 32° 37° 675 312 79 21 10
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 43° 691 318 79 21 10
04-04 28° 49° 708 324 79 21 10
04-05 31° 42° 722 329 79 21 10
04-06 28° 59° 744 340 81 21 10
04-07 25° 43° 756 343 81 21 10
04-08 22° 50° 770 347 81 21 10
04-09 37° 62° 798 365 88 21 10
04-10 42° 52° 823 379 93 21 10
04-11 39° 56° 848 395 99 21 10
04-12 39° 68° 880 417 111 25 10
04-13 54° 68° 919 446 130 36 16
04-14 42° 58° 947 464 138 36 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 37° 54° 970 477 141 36 16
04-16 33° 60° 995 492 145 36 16
04-17 49° 72° 1033 520 164 47 22
04-18 45° 58° 1063 540 174 48 22
04-19 33° 54° 1084 551 175 48 22
04-20 36° 55° 1108 565 178 48 22
04-21 39° 60° 1135 582 186 48 22
04-22 49° 70° 1173 610 203 58 26
04-23 48° 67° 1208 635 219 65 29
04-24 45° 51° 1234 651 225 65 29
04-25 42° 57° 1262 669 233 65 29
04-26 35° 63° 1289 686 240 65 29
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 50° 65° 1325 711 255 73 31
04-28 58° 71° 1367 744 277 87 40
04-29 42° 59° 1395 762 286 87 40
04-30 39° 69° 1427 784 298 91 40
05-01 52° 65° 1464 811 314 100 44
05-02 44° 52° 1490 827 320 100 44
05-03 42° 66° 1522 849 333 104 44
05-04 46° 80° 1563 880 353 117 52
05-05 54° 76° 1606 913 377 132 62
05-06 50° 82° 1650 947 401 148 73
05-07 54° 70° 1690 977 421 160 80
05-08 44° 71° 1725 1002 436 168 82
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 46° 85° 1769 1036 460 183 93
05-10 53° 74° 1811 1068 481 197 102
05-11 59° 90° 1863 1110 514 222 121
05-12 60° 86° 1915 1151 545 245 140
05-13 62° 86° 1967 1194 577 269 159
05-14 64° 85° 2019 1236 610 294 178
05-15 59° 78° 2066 1273 637 312 192
05-16 49° 61° 2100 1296 650 318 192
05-17 44° 51° 2125 1312 656 318 192
05-18 42° 56° 2153 1329 663 318 192
05-19 39° 59° 2179 1346 670 318 192
05-20 42° 48° 2203 1359 673 318 192
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 44° 49° 2227 1374 678 318 192
05-22 41° 65° 2258 1395 689 320 192
05-23 42° 63° 2289 1416 700 323 192
05-24 44° 66° 2322 1439 713 328 192
05-25 43° 70° 2356 1463 727 335 194
05-26 46° 71° 2393 1490 744 343 197
05-27 56° 64° 2431 1518 761 353 202
05-28 53° 60° 2466 1543 776 360 204
05-29 54° 71° 2506 1573 797 373 212
05-30 55° 78° 2551 1608 822 389 224
05-31 56° 78° 2597 1643 847 407 236
06-01 53° 80° 2641 1678 872 424 248
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 63° 90° 2696 1723 907 450 270
06-03 55° 70° 2736 1753 927 463 277
06-04 51° 77° 2778 1785 949 477 286
06-05 52° 78° 2822 1819 972 492 296
06-06 60° 71° 2865 1852 996 508 307
06-07 56° 76° 2909 1886 1020 524 318
06-08 58° 70° 2952 1918 1042 538 327
06-09 51° 66° 2988 1945 1059 546 331
06-10 58° 82° 3036 1983 1087 567 346
06-11 62° 71° 3081 2018 1112 583 357
06-12 57° 70° 3123 2050 1133 597 366
06-13 52° 59° 3156 2073 1147 602 367
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 53° 62° 3192 2098 1162 610 369
06-15 58° 74° 3235 2132 1186 626 380
06-16 65° 80° 3286 2173 1216 648 397
06-17 62° 79° 3334 2211 1245 669 413
06-18 61° 81° 3384 2251 1274 690 429
06-19 60° 87° 3435 2292 1306 714 448
06-20 69° 85° 3490 2337 1341 740 469
06-21 80° 96° 3556 2393 1387 778 503
06-22 82° 94° 3623 2449 1433 817 536
06-23 72° 88° 3680 2497 1471 847 561
06-24 61° 79° 3728 2535 1499 867 576
06-25 63° 71° 3774 2570 1524 884 588
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 61° 65° 3815 2602 1545 897 596
06-27 59° 71° 3858 2634 1568 912 606
06-28 62° 82° 3907 2674 1598 934 623
06-29 67° 81° 3959 2716 1630 958 642
06-30 63° 80° 4009 2755 1659 979 658
07-01 63° 85° 4061 2797 1691 1003 677
07-02 65° 89° 4116 2843 1726 1030 699
07-03 70° 91° 4174 2891 1765 1060 724
07-04 79° 92° 4238 2945 1808 1096 755
07-05 72° 83° 4293 2990 1844 1123 778
07-06 66° 83° 4346 3032 1876 1148 797
07-07 62° 85° 4397 3074 1907 1171 815
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 83° 4449 3116 1939 1195 834
07-09 64° 85° 4501 3158 1972 1219 853
07-10 70° 80° 4554 3201 2005 1245 874
07-11 68° 84° 4608 3245 2039 1271 895
07-12 67° 78° 4659 3286 2070 1293 912
07-13 62° 87° 4711 3328 2102 1317 932
07-14 68° 91° 4769 3375 2139 1347 956
07-15 73° 93° 4829 3426 2180 1380 984
07-16 56° 71° 4871 3458 2202 1393 993
07-17 51° 71° 4910 3487 2221 1405 999
07-18 57° 73° 4953 3520 2244 1420 1009
07-19 65° 76° 5002 3559 2273 1441 1025
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 80° 5049 3596 2300 1459 1039
07-21 63° 80° 5099 3635 2329 1481 1055
07-22 73° 88° 5158 3684 2368 1512 1081
07-23 71° 81° 5211 3728 2402 1538 1102
07-24 69° 83° 5265 3772 2436 1564 1123
07-25 64° 85° 5318 3815 2469 1588 1142
07-26 69° 89° 5375 3862 2506 1617 1166
07-27 71° 90° 5434 3910 2544 1648 1192
07-28 66° 87° 5488 3955 2579 1674 1213
07-29 66° 84° 5541 3998 2612 1699 1234
07-30 69° 79° 5593 4040 2644 1724 1253
07-31 57° 77° 5638 4075 2669 1741 1265
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 61° 78° 5686 4112 2696 1760 1279
08-02 57° 78° 5731 4148 2722 1778 1292
08-03 61° 77° 5778 4185 2749 1797 1306
08-04 66° 77° 5828 4224 2778 1818 1322
08-05 62° 81° 5877 4264 2808 1839 1339
08-06 68° 81° 5930 4307 2840 1864 1358
08-07 67° 86° 5984 4351 2875 1891 1380
08-08 72° 87° 6042 4399 2912 1920 1404
08-09 70° 83° 6096 4443 2947 1946 1425
08-10 67° 82° 6149 4485 2979 1971 1445
08-11 61° 78° 6196 4523 3007 1991 1460
08-12 68° 80° 6248 4565 3039 2014 1479
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 61° 80° 6296 4603 3067 2035 1494
08-14 66° 75° 6345 4642 3096 2055 1510
08-15 69° 83° 6399 4686 3130 2082 1531
08-16 69° 82° 6453 4729 3163 2107 1551
08-17 69° 78° 6504 4771 3195 2130 1570
08-18 68° 78° 6555 4812 3226 2154 1588
08-19 69° 85° 6610 4857 3261 2181 1610
08-20 66° 81° 6662 4899 3292 2204 1628
08-21 65° 83° 6714 4940 3324 2228 1647
08-22 69° 78° 6765 4982 3355 2251 1665
08-23 58° 70° 6807 5014 3378 2265 1675
08-24 56° 66° 6846 5043 3397 2276 1681
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 50° 69° 6884 5070 3414 2286 1685
08-26 54° 74° 6926 5103 3437 2300 1694
08-27 55° 79° 6971 5138 3461 2317 1706
08-28 59° 79° 7018 5175 3488 2336 1720
08-29 61° 78° 7065 5212 3516 2355 1735
08-30 59° 77° 7111 5248 3542 2373 1747
08-31 53° 78° 7155 5281 3565 2389 1758
09-01 60° 78° 7202 5318 3592 2408 1772
09-02 60° 74° 7246 5353 3617 2425 1784
09-03 51° 66° 7283 5380 3633 2433 1787
09-04 44° 59° 7312 5399 3643 2435 1787
09-05 45° 58° 7342 5419 3652 2436 1787
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 45° 58° 7371 5438 3661 2437 1787
09-07 42° 64° 7402 5459 3673 2440 1787
09-08 47° 78° 7443 5490 3693 2453 1795
09-09 63° 69° 7487 5524 3717 2469 1806
09-10 61° 73° 7532 5559 3743 2486 1818
09-11 56° 76° 7576 5593 3766 2502 1829
09-12 61° 81° 7625 5632 3796 2523 1845
09-13 65° 82° 7676 5673 3827 2547 1864
09-14 68° 86° 7731 5718 3862 2573 1885
09-15 72° 82° 7786 5763 3897 2601 1908
09-16 69° 91° 7844 5811 3935 2630 1932
09-17 66° 81° 7896 5852 3966 2654 1951
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 65° 81° 7947 5893 3997 2677 1969
09-19 65° 72° 7993 5930 4024 2695 1982
09-20 62° 71° 8037 5964 4048 2712 1994
09-21 64° 76° 8086 6002 4076 2732 2009
09-22 59° 74° 8130 6037 4101 2748 2020
09-23 58° 74° 8174 6071 4124 2764 2031
09-24 55° 74° 8217 6103 4147 2779 2041
09-25 54° 82° 8263 6140 4173 2797 2054
09-26 56° 78° 8308 6175 4199 2814 2066
09-27 54° 73° 8350 6207 4221 2828 2075
09-28 47° 79° 8391 6238 4242 2841 2083
09-29 53° 87° 8439 6276 4270 2862 2099
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 65° 83° 8491 6318 4302 2886 2118
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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° 74° 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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(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
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 60° 84° 8501 6315 4330 2902 2087

 

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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