Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

Early Season Fungicide App for Dollar Spot Suppression (GDD 50)
forecast for Fri, Dec. 19. 2025

 
  

Traverse City, 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 17° 26° 0 0 0 0 0
02-16 15° 25° 0 0 0 0 0
02-17 8° 14° 0 0 0 0 0
02-18 7° 14° 0 0 0 0 0
02-19 11° 19° 0 0 0 0 0
02-20 9° 24° 0 0 0 0 0
02-21 17° 30° 2 0 0 0 0
02-22 19° 28° 3 0 0 0 0
02-23 20° 34° 8 0 0 0 0
02-24 29° 47° 24 6 0 0 0
02-25 25° 41° 35 7 0 0 0
02-26 21° 46° 47 8 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 26° 38° 57 8 0 0 0
02-28 18° 41° 64 8 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 12° 21° 64 8 0 0 0
03-02 12° 26° 64 8 0 0 0
03-03 15° 41° 70 8 0 0 0
03-04 33° 43° 86 14 0 0 0
03-05 24° 48° 101 19 0 0 0
03-06 22° 32° 106 19 0 0 0
03-07 21° 37° 113 19 0 0 0
03-08 17° 33° 116 19 0 0 0
03-09 24° 48° 130 23 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 59° 152 35 3 0 0
03-11 22° 54° 168 41 3 0 0
03-12 19° 42° 177 41 3 0 0
03-13 24° 49° 192 46 3 0 0
03-14 35° 66° 220 64 11 0 0
03-15 48° 67° 256 90 27 8 3
03-16 25° 47° 270 94 27 8 3
03-17 16° 43° 277 94 27 8 3
03-18 39° 51° 300 107 30 8 3
03-19 33° 44° 317 113 30 8 3
03-20 25° 33° 324 113 30 8 3
03-21 24° 50° 339 118 30 8 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 16° 40° 344 118 30 8 3
03-23 14° 44° 351 118 30 8 3
03-24 30° 34° 362 119 30 8 3
03-25 26° 33° 369 119 30 8 3
03-26 21° 39° 377 119 30 8 3
03-27 28° 53° 396 127 30 8 3
03-28 31° 47° 413 134 30 8 3
03-29 33° 38° 426 138 30 8 3
03-30 33° 36° 439 140 30 8 3
03-31 28° 34° 447 140 30 8 3
04-01 19° 40° 455 140 30 8 3
04-02 29° 45° 470 145 30 8 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 48° 489 154 30 8 3
04-04 26° 48° 505 159 30 8 3
04-05 32° 46° 522 166 30 8 3
04-06 24° 45° 535 169 30 8 3
04-07 22° 37° 542 169 30 8 3
04-08 22° 34° 548 169 30 8 3
04-09 20° 44° 558 170 30 8 3
04-10 33° 46° 576 177 30 8 3
04-11 25° 51° 592 183 30 8 3
04-12 25° 58° 611 193 30 8 3
04-13 42° 65° 643 215 42 12 3
04-14 47° 61° 675 237 54 16 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 33° 46° 693 244 54 16 3
04-16 31° 46° 710 251 54 16 3
04-17 27° 68° 735 267 59 16 3
04-18 49° 62° 769 290 73 22 3
04-19 37° 49° 790 301 74 22 3
04-20 28° 56° 810 311 74 22 3
04-21 41° 55° 836 327 80 22 3
04-22 35° 57° 860 341 84 22 3
04-23 37° 65° 888 360 93 22 3
04-24 46° 58° 918 380 103 24 3
04-25 43° 55° 945 396 109 24 3
04-26 40° 53° 969 410 113 24 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 29° 64° 993 425 118 24 3
04-28 43° 77° 1031 453 136 34 8
04-29 35° 74° 1064 475 148 38 8
04-30 29° 56° 1084 486 149 38 8
05-01 42° 47° 1107 498 151 38 8
05-02 41° 47° 1128 510 153 38 8
05-03 38° 48° 1149 521 154 38 8
05-04 31° 66° 1176 538 161 38 8
05-05 46° 66° 1210 562 175 44 9
05-06 48° 66° 1245 587 190 52 11
05-07 41° 59° 1273 605 198 52 11
05-08 36° 57° 1298 619 202 52 11
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 29° 66° 1323 635 208 52 11
05-10 43° 57° 1351 653 216 52 11
05-11 34° 73° 1383 675 228 55 11
05-12 47° 83° 1426 707 250 70 21
05-13 51° 75° 1467 739 272 84 29
05-14 60° 71° 1510 772 295 99 40
05-15 58° 85° 1560 811 324 120 56
05-16 57° 84° 1609 850 353 141 72
05-17 49° 60° 1641 873 366 145 72
05-18 39° 47° 1662 884 367 145 72
05-19 38° 56° 1687 899 372 145 72
05-20 37° 59° 1713 915 378 145 72
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 55° 1743 934 387 147 72
05-22 44° 55° 1771 952 395 147 72
05-23 40° 50° 1794 966 399 147 72
05-24 44° 56° 1822 984 407 147 72
05-25 35° 60° 1848 999 412 147 72
05-26 38° 69° 1879 1021 424 151 72
05-27 43° 71° 1914 1046 439 158 74
05-28 51° 75° 1955 1077 460 171 82
05-29 55° 70° 1996 1107 480 183 90
05-30 50° 66° 2032 1134 497 192 93
05-31 43° 59° 2061 1153 506 193 93
06-01 34° 64° 2088 1170 513 193 93
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 41° 78° 2126 1197 530 202 97
06-03 62° 85° 2177 1239 562 226 116
06-04 53° 72° 2218 1270 583 238 124
06-05 47° 75° 2257 1298 601 249 129
06-06 50° 71° 2295 1327 620 259 135
06-07 47° 75° 2335 1356 639 271 141
06-08 53° 78° 2378 1390 663 287 152
06-09 52° 73° 2419 1420 683 299 159
06-10 52° 65° 2455 1446 699 307 162
06-11 51° 76° 2497 1478 721 321 171
06-12 52° 69° 2535 1507 740 331 177
06-13 52° 62° 2570 1532 755 339 179
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 50° 72° 2609 1561 774 350 185
06-15 59° 74° 2654 1596 799 366 197
06-16 56° 82° 2701 1633 826 386 211
06-17 65° 83° 2753 1675 858 409 230
06-18 61° 75° 2799 1710 883 427 242
06-19 60° 74° 2844 1745 908 444 254
06-20 59° 80° 2891 1782 935 463 268
06-21 67° 89° 2947 1829 972 491 292
06-22 77° 93° 3010 1882 1015 527 322
06-23 76° 90° 3071 1933 1056 560 350
06-24 67° 78° 3122 1973 1086 582 367
06-25 58° 75° 3167 2008 1111 599 379
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 62° 74° 3213 2044 1137 617 392
06-27 64° 82° 3264 2085 1168 640 410
06-28 62° 77° 3311 2122 1195 659 424
06-29 60° 86° 3362 2163 1226 682 442
06-30 67° 82° 3414 2206 1259 706 462
07-01 62° 80° 3463 2245 1288 728 478
07-02 65° 84° 3516 2287 1320 752 497
07-03 61° 79° 3564 2325 1348 772 512
07-04 54° 88° 3613 2364 1377 793 528
07-05 73° 91° 3673 2414 1417 825 555
07-06 64° 76° 3721 2452 1445 845 570
07-07 60° 71° 3764 2486 1469 861 581
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 52° 82° 3809 2521 1494 878 593
07-09 60° 76° 3855 2557 1520 896 606
07-10 56° 78° 3900 2592 1545 913 618
07-11 57° 83° 3949 2630 1573 933 633
07-12 69° 78° 4000 2672 1605 956 652
07-13 63° 79° 4049 2710 1633 977 667
07-14 59° 85° 4099 2750 1663 999 684
07-15 63° 89° 4153 2794 1697 1025 705
07-16 66° 83° 4205 2837 1730 1049 725
07-17 55° 67° 4244 2865 1748 1060 730
07-18 46° 75° 4282 2894 1767 1070 736
07-19 58° 78° 4328 2929 1792 1088 748
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 61° 74° 4373 2965 1818 1105 761
07-21 51° 76° 4415 2996 1839 1119 769
07-22 56° 82° 4462 3033 1866 1138 783
07-23 66° 86° 4516 3077 1900 1164 804
07-24 70° 82° 4570 3122 1935 1190 826
07-25 62° 81° 4620 3161 1964 1212 842
07-26 62° 81° 4670 3201 1994 1234 859
07-27 69° 90° 4727 3249 2032 1264 884
07-28 69° 87° 4783 3295 2068 1291 907
07-29 62° 87° 4836 3337 2100 1316 926
07-30 63° 73° 4882 3373 2126 1334 939
07-31 58° 74° 4926 3407 2150 1350 950
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 48° 74° 4965 3436 2169 1361 956
08-02 50° 79° 5007 3469 2192 1375 966
08-03 53° 80° 5052 3503 2216 1392 977
08-04 54° 82° 5098 3539 2242 1410 990
08-05 57° 83° 5146 3577 2270 1430 1005
08-06 54° 85° 5193 3615 2298 1449 1020
08-07 64° 89° 5247 3659 2332 1476 1041
08-08 69° 91° 5305 3707 2370 1506 1066
08-09 72° 94° 5366 3757 2410 1538 1093
08-10 69° 85° 5421 3803 2446 1565 1116
08-11 71° 81° 5475 3847 2480 1591 1137
08-12 68° 78° 5526 3888 2511 1614 1155
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 60° 78° 5573 3925 2538 1634 1169
08-14 55° 81° 5619 3961 2564 1652 1182
08-15 62° 87° 5672 4003 2596 1676 1201
08-16 69° 85° 5727 4049 2632 1703 1224
08-17 62° 75° 5774 4086 2659 1722 1238
08-18 55° 72° 5816 4117 2680 1736 1246
08-19 63° 68° 5859 4151 2704 1751 1257
08-20 57° 75° 5903 4185 2728 1767 1268
08-21 55° 77° 5947 4218 2751 1783 1278
08-22 57° 80° 5993 4255 2778 1802 1292
08-23 61° 74° 6039 4291 2804 1819 1305
08-24 56° 69° 6080 4321 2824 1832 1312
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 65° 6117 4349 2842 1841 1317
08-26 45° 67° 6151 4372 2855 1847 1317
08-27 42° 74° 6187 4398 2871 1855 1320
08-28 53° 64° 6223 4424 2887 1863 1323
08-29 41° 65° 6254 4446 2899 1867 1323
08-30 39° 71° 6287 4469 2912 1871 1323
08-31 45° 76° 6326 4497 2930 1882 1329
09-01 52° 79° 6369 4531 2954 1897 1339
09-02 51° 77° 6411 4563 2976 1912 1349
09-03 51° 65° 6447 4589 2992 1920 1352
09-04 43° 58° 6476 4607 3000 1920 1352
09-05 50° 57° 6508 4629 3012 1924 1352
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 47° 56° 6537 4649 3022 1925 1352
09-07 42° 59° 6565 4667 3030 1926 1352
09-08 40° 66° 6596 4688 3041 1928 1352
09-09 50° 73° 6636 4717 3060 1940 1358
09-10 47° 74° 6675 4746 3079 1951 1364
09-11 52° 72° 6715 4776 3099 1963 1371
09-12 47° 76° 6755 4806 3119 1975 1378
09-13 57° 79° 6801 4843 3146 1993 1392
09-14 52° 81° 6845 4877 3170 2010 1403
09-15 55° 82° 6892 4914 3197 2028 1417
09-16 51° 81° 6936 4948 3221 2044 1428
09-17 53° 83° 6982 4984 3247 2062 1441
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 58° 73° 7026 5017 3270 2078 1451
09-19 59° 74° 7070 5052 3295 2095 1463
09-20 56° 73° 7113 5084 3317 2109 1472
09-21 59° 71° 7156 5118 3341 2124 1483
09-22 59° 72° 7200 5151 3364 2140 1493
09-23 59° 68° 7241 5183 3386 2153 1502
09-24 58° 68° 7282 5214 3407 2166 1510
09-25 55° 69° 7322 5243 3426 2178 1516
09-26 52° 67° 7360 5271 3444 2188 1521
09-27 49° 80° 7402 5304 3467 2203 1531
09-28 43° 76° 7440 5331 3484 2212 1535
09-29 41° 80° 7478 5360 3503 2223 1541
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 43° 80° 7518 5389 3522 2234 1547
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 25° 34° 7 0 0 0 0
02-16 19° 26° 8 0 0 0 0
02-17 12° 28° 8 0 0 0 0
02-18 22° 32° 13 0 0 0 0
02-19 10° 37° 15 0 0 0 0
02-20 15° 47° 24 0 0 0 0
02-21 29° 56° 44 10 0 0 0
02-22 23° 53° 61 17 0 0 0
02-23 16° 33° 63 17 0 0 0
02-24 12° 31° 63 17 0 0 0
02-25 26° 46° 78 21 0 0 0
02-26 21° 52° 92 26 0 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 47° 70° 128 52 16 8 3
02-28 17° 51° 140 54 16 8 3
02-29 14° 27° 140 54 16 8 3
03-01 23° 53° 156 59 16 8 3
03-02 35° 55° 179 72 19 8 3
03-03 34° 60° 204 88 25 8 3
03-04 38° 64° 233 107 34 9 3
03-05 33° 45° 250 114 34 9 3
03-06 30° 51° 269 122 34 9 3
03-07 24° 54° 286 129 34 9 3
03-08 37° 49° 306 140 34 9 3
03-09 28° 36° 316 140 34 9 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 28° 38° 327 141 34 9 3
03-11 26° 57° 346 150 34 9 3
03-12 30° 68° 373 167 42 9 3
03-13 29° 61° 397 180 45 9 3
03-14 34° 48° 416 189 45 9 3
03-15 30° 44° 430 194 45 9 3
03-16 32° 51° 449 203 45 9 3
03-17 23° 34° 456 203 45 9 3
03-18 23° 30° 460 203 45 9 3
03-19 27° 40° 472 204 45 9 3
03-20 20° 30° 475 204 45 9 3
03-21 17° 31° 477 204 45 9 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 20° 31° 480 204 45 9 3
03-23 19° 33° 484 204 45 9 3
03-24 19° 40° 491 204 45 9 3
03-25 30° 58° 513 217 47 9 3
03-26 42° 57° 541 234 54 9 3
03-27 30° 41° 554 237 54 9 3
03-28 29° 37° 565 238 54 9 3
03-29 22° 42° 575 238 54 9 3
03-30 27° 42° 587 241 54 9 3
03-31 31° 44° 603 246 54 9 3
04-01 30° 45° 619 252 54 9 3
04-02 35° 47° 637 261 54 9 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 44° 656 269 54 9 3
04-04 34° 42° 672 275 54 9 3
04-05 31° 49° 690 284 54 9 3
04-06 28° 52° 709 292 54 9 3
04-07 27° 62° 731 305 57 9 3
04-08 43° 70° 766 329 71 16 5
04-09 43° 66° 798 352 84 20 5
04-10 37° 67° 828 372 94 22 5
04-11 43° 59° 857 391 103 23 5
04-12 43° 47° 881 404 106 23 5
04-13 37° 56° 905 419 111 23 5
04-14 46° 63° 937 441 123 28 5
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 33° 62° 963 457 129 28 5
04-16 31° 63° 988 472 134 28 5
04-17 49° 59° 1020 494 146 32 5
04-18 45° 57° 1049 513 155 33 5
04-19 39° 48° 1071 524 157 33 5
04-20 35° 43° 1088 531 157 33 5
04-21 31° 49° 1105 539 157 33 5
04-22 28° 64° 1130 553 161 33 5
04-23 38° 68° 1160 574 172 36 5
04-24 31° 42° 1175 578 172 36 5
04-25 23° 56° 1192 586 172 36 5
04-26 30° 66° 1218 602 177 36 5
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 54° 78° 1262 636 201 52 15
04-28 46° 61° 1294 657 213 55 15
04-29 49° 64° 1328 682 227 62 17
04-30 45° 59° 1358 702 237 64 17
05-01 43° 66° 1391 724 250 68 17
05-02 40° 68° 1423 746 262 73 17
05-03 48° 67° 1459 772 278 80 20
05-04 40° 75° 1494 798 293 88 22
05-05 48° 62° 1527 821 306 93 22
05-06 39° 70° 1560 843 319 98 22
05-07 44° 70° 1595 869 334 105 24
05-08 49° 58° 1627 890 346 109 24
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 46° 61° 1658 912 357 112 24
05-10 38° 63° 1686 930 366 112 24
05-11 47° 59° 1717 951 377 115 24
05-12 38° 77° 1752 976 392 122 26
05-13 52° 67° 1790 1004 409 132 31
05-14 42° 62° 1820 1024 419 134 31
05-15 40° 68° 1852 1045 431 138 31
05-16 41° 75° 1888 1071 447 146 34
05-17 53° 74° 1930 1103 469 159 43
05-18 47° 84° 1974 1137 493 175 54
05-19 57° 74° 2017 1171 517 191 64
05-20 52° 78° 2060 1204 540 206 75
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 60° 80° 2108 1242 568 226 89
05-22 58° 72° 2152 1275 591 241 100
05-23 51° 74° 2192 1306 612 254 108
05-24 48° 78° 2234 1337 633 267 116
05-25 57° 69° 2275 1369 654 281 124
05-26 53° 74° 2316 1400 675 294 132
05-27 55° 61° 2352 1426 691 302 135
05-28 53° 66° 2389 1453 708 311 139
05-29 50° 63° 2423 1477 723 317 141
05-30 38° 69° 2455 1498 734 320 141
05-31 40° 78° 2491 1525 751 329 145
06-01 52° 76° 2534 1557 773 343 154
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 58° 75° 2578 1591 797 360 165
06-03 52° 84° 2624 1628 823 378 178
06-04 66° 84° 2677 1671 856 403 198
06-05 65° 73° 2724 1707 883 422 212
06-06 58° 70° 2766 1740 905 436 221
06-07 56° 67° 2805 1769 925 447 227
06-08 48° 65° 2840 1793 939 454 229
06-09 50° 62° 2874 1818 953 460 230
06-10 45° 62° 2906 1839 965 463 230
06-11 38° 70° 2938 1861 977 467 230
06-12 55° 83° 2985 1898 1004 486 244
06-13 63° 81° 3035 1939 1034 509 262
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 53° 74° 3077 1970 1056 522 270
06-15 46° 79° 3117 2001 1077 535 278
06-16 64° 79° 3167 2041 1107 557 295
06-17 71° 91° 3227 2090 1146 588 321
06-18 73° 88° 3285 2139 1185 619 347
06-19 70° 90° 3343 2187 1222 649 372
06-20 60° 68° 3385 2219 1245 663 381
06-21 65° 76° 3434 2258 1273 684 396
06-22 66° 75° 3482 2296 1302 704 412
06-23 62° 74° 3528 2332 1327 722 425
06-24 54° 80° 3573 2367 1352 739 437
06-25 65° 81° 3624 2408 1384 762 455
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 57° 72° 3667 2440 1406 777 464
06-27 49° 70° 3704 2468 1424 786 469
06-28 51° 67° 3741 2495 1441 795 473
06-29 58° 80° 3788 2532 1468 814 487
06-30 52° 71° 3824 2557 1483 822 489
07-01 43° 75° 3861 2585 1500 831 493
07-02 53° 68° 3900 2613 1519 842 499
07-03 61° 79° 3948 2652 1547 862 514
07-04 64° 81° 3999 2692 1578 885 532
07-05 62° 76° 4046 2730 1606 904 547
07-06 63° 75° 4094 2767 1633 923 561
07-07 56° 82° 4140 2804 1660 942 575
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 67° 81° 4192 2846 1692 966 594
07-09 61° 82° 4242 2886 1721 988 611
07-10 67° 77° 4292 2926 1752 1010 628
07-11 60° 80° 4340 2964 1780 1030 643
07-12 58° 86° 4390 3004 1809 1052 660
07-13 61° 88° 4443 3046 1842 1076 679
07-14 71° 87° 4500 3093 1879 1105 703
07-15 70° 88° 4557 3140 1916 1135 727
07-16 68° 79° 4608 3182 1948 1158 746
07-17 60° 72° 4653 3216 1972 1174 757
07-18 53° 74° 4694 3248 1993 1188 766
07-19 49° 81° 4737 3281 2016 1203 776
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 84° 4786 3320 2046 1224 792
07-21 65° 81° 4838 3361 2077 1247 810
07-22 58° 81° 4885 3399 2104 1267 825
07-23 56° 70° 4926 3430 2125 1280 833
07-24 61° 71° 4970 3464 2149 1296 844
07-25 53° 75° 5012 3496 2172 1310 853
07-26 49° 82° 5056 3529 2195 1326 863
07-27 55° 86° 5104 3568 2224 1346 879
07-28 57° 86° 5154 3608 2253 1368 896
07-29 71° 87° 5211 3654 2290 1396 919
07-30 67° 86° 5266 3699 2325 1423 941
07-31 68° 85° 5320 3744 2359 1450 962
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 64° 83° 5372 3785 2391 1473 981
08-02 66° 88° 5427 3830 2426 1501 1003
08-03 62° 84° 5478 3871 2457 1524 1021
08-04 65° 84° 5531 3914 2490 1548 1041
08-05 64° 76° 5579 3952 2518 1568 1056
08-06 58° 78° 5624 3988 2544 1586 1069
08-07 49° 80° 5667 4020 2566 1600 1078
08-08 58° 81° 5714 4058 2594 1620 1093
08-09 58° 70° 5756 4090 2616 1634 1102
08-10 56° 66° 5795 4119 2634 1645 1108
08-11 55° 70° 5836 4149 2655 1658 1115
08-12 49° 80° 5878 4182 2677 1672 1125
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 52° 82° 5923 4217 2703 1689 1137
08-14 51° 85° 5969 4253 2729 1707 1150
08-15 56° 86° 6019 4292 2758 1728 1166
08-16 65° 79° 6068 4332 2788 1750 1183
08-17 66° 73° 6116 4370 2815 1770 1198
08-18 63° 75° 6163 4407 2842 1789 1211
08-19 56° 69° 6203 4437 2863 1801 1219
08-20 47° 67° 6239 4462 2878 1809 1221
08-21 42° 73° 6274 4488 2894 1816 1224
08-22 46° 77° 6314 4517 2913 1827 1230
08-23 52° 79° 6357 4551 2937 1843 1241
08-24 56° 82° 6404 4588 2964 1862 1255
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 55° 88° 6454 4627 2993 1883 1271
08-26 69° 92° 6512 4676 3031 1914 1297
08-27 71° 86° 6569 4723 3068 1943 1320
08-28 63° 72° 6614 4758 3094 1960 1333
08-29 60° 74° 6660 4793 3119 1978 1345
08-30 65° 79° 6710 4833 3149 1999 1362
08-31 55° 82° 6756 4870 3175 2018 1376
09-01 55° 70° 6797 4900 3196 2030 1383
09-02 44° 71° 6832 4926 3212 2038 1386
09-03 44° 77° 6871 4954 3230 2049 1391
09-04 51° 81° 6915 4988 3254 2064 1402
09-05 53° 82° 6960 5024 3279 2082 1415
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 51° 61° 6994 5048 3294 2088 1416
09-07 45° 58° 7024 5067 3303 2089 1416
09-08 40° 70° 7057 5090 3316 2095 1416
09-09 53° 72° 7097 5121 3337 2107 1423
09-10 44° 82° 7138 5152 3358 2120 1432
09-11 61° 82° 7188 5191 3387 2142 1448
09-12 52° 87° 7235 5229 3414 2161 1462
09-13 50° 86° 7281 5264 3440 2178 1475
09-14 52° 86° 7327 5301 3467 2197 1488
09-15 57° 88° 7378 5341 3497 2220 1506
09-16 55° 87° 7427 5381 3526 2241 1522
09-17 51° 84° 7472 5416 3552 2258 1535
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 48° 84° 7516 5450 3576 2274 1545
09-19 50° 85° 7562 5486 3601 2292 1558
09-20 59° 80° 7610 5523 3629 2312 1573
09-21 57° 83° 7657 5561 3657 2331 1587
09-22 57° 72° 7700 5593 3679 2345 1597
09-23 50° 68° 7737 5621 3696 2355 1601
09-24 48° 66° 7772 5646 3711 2362 1603
09-25 55° 72° 7813 5677 3732 2375 1611
09-26 48° 78° 7854 5708 3753 2388 1619
09-27 46° 79° 7895 5738 3774 2401 1627
09-28 49° 79° 7937 5771 3796 2415 1636
09-29 48° 80° 7979 5802 3818 2428 1645
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 46° 81° 8020 5834 3840 2442 1653

 

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.


 

 

© Copyright 2004-2025, Department of Crop and Soil Sciences, Michigan State University.
Weather data and programming assistance provided by Enviro-Weather and NWS
All Rights Reserved. Custom web development by Dynamite Inc.