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Early Season Fungicide App for Dollar Spot Suppression (GDD 50)
through Sun, Jun. 7. 2026

 
  

Traverse City, MI

        

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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 21° 41° 9 0 0 0 0
02-16 23° 43° 20 1 0 0 0
02-17 16° 42° 27 1 0 0 0
02-18 33° 37° 40 4 0 0 0
02-19 25° 44° 53 7 0 0 0
02-20 32° 37° 65 9 0 0 0
02-21 26° 32° 72 9 0 0 0
02-22 24° 29° 77 9 0 0 0
02-23 10° 23° 77 9 0 0 0
02-24 5° 29° 77 9 0 0 0
02-25 13° 28° 77 9 0 0 0
02-26 1° 31° 77 9 0 0 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 16° 46° 86 9 0 0 0
02-28 16° 39° 91 9 0 0 0
03-01 8° 22° 91 9 0 0 0
03-02 4° 35° 91 9 0 0 0
03-03 25° 42° 103 11 0 0 0
03-04 28° 52° 120 19 0 0 0
03-05 30° 48° 137 25 0 0 0
03-06 39° 49° 159 37 2 0 0
03-07 33° 60° 184 52 7 0 0
03-08 32° 48° 202 60 7 0 0
03-09 45° 63° 234 82 19 4 0
03-10 34° 43° 251 89 19 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 30° 33° 260 89 19 4 0
03-12 25° 33° 267 89 19 4 0
03-13 27° 36° 277 89 19 4 0
03-14 18° 32° 279 89 19 4 0
03-15 26° 30° 286 89 19 4 0
03-16 17° 26° 286 89 19 4 0
03-17 12° 18° 286 89 19 4 0
03-18 10° 29° 286 89 19 4 0
03-19 28° 36° 296 89 19 4 0
03-20 32° 43° 311 94 19 4 0
03-21 28° 43° 325 98 19 4 0
03-22 30° 38° 337 100 19 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 16° 32° 339 100 19 4 0
03-24 13° 40° 343 100 19 4 0
03-25 19° 49° 355 102 19 4 0
03-26 26° 40° 366 103 19 4 0
03-27 18° 30° 368 103 19 4 0
03-28 22° 32° 373 103 19 4 0
03-29 30° 56° 394 114 20 4 0
03-30 40° 59° 422 132 27 4 0
03-31 35° 48° 442 141 27 4 0
04-01 28° 39° 453 142 27 4 0
04-02 30° 45° 468 148 27 4 0
04-03 33° 51° 488 158 27 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 45° 505 164 27 4 0
04-05 32° 41° 519 169 27 4 0
04-06 22° 43° 530 169 27 4 0
04-07 22° 35° 536 169 27 4 0
04-08 23° 60° 556 179 27 4 0
04-09 41° 55° 582 195 34 4 0
04-10 31° 43° 597 201 34 4 0
04-11 26° 58° 617 210 34 4 0
04-12 41° 63° 648 231 44 6 0
04-13 50° 62° 681 255 58 12 1
04-14 49° 71° 719 282 75 22 6
04-15 47° 58° 750 303 86 24 6
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 42° 54° 776 319 92 24 6
04-17 35° 77° 810 343 106 30 7
04-18 37° 62° 837 360 114 30 7
04-19 29° 37° 848 362 114 30 7
04-20 20° 44° 858 362 114 30 7
04-21 38° 65° 888 381 123 32 7
04-22 35° 64° 915 399 131 32 7
04-23 45° 77° 954 428 150 43 13
04-24 42° 71° 989 453 165 50 14
04-25 39° 46° 1010 464 166 50 14
04-26 37° 62° 1038 481 173 50 14
04-27 45° 71° 1074 507 189 58 17
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 44° 63° 1105 529 201 61 17
04-29 39° 46° 1126 539 201 61 17
04-30 35° 44° 1144 547 201 61 17
05-01 33° 42° 1159 552 201 61 17
05-02 25° 50° 1175 558 201 61 17
05-03 35° 60° 1200 574 207 61 17
05-04 38° 74° 1234 598 221 68 18
05-05 41° 54° 1260 613 226 68 18
05-06 32° 47° 1277 621 226 68 18
05-07 32° 48° 1295 629 226 68 18
05-08 30° 62° 1319 643 231 68 18
05-09 41° 58° 1347 661 238 68 18
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 31° 51° 1366 669 238 68 18
05-11 30° 48° 1383 676 238 68 18
05-12 31° 62° 1408 691 243 68 18
05-13 40° 50° 1431 704 246 68 18
05-14 34° 62° 1457 721 253 68 18
05-15 42° 74° 1493 746 268 75 21
05-16 56° 80° 1539 782 294 93 34
05-17 47° 61° 1571 804 306 97 34
05-18 52° 80° 1615 838 330 113 45
05-19 48° 75° 1655 868 350 125 52
05-20 41° 52° 1679 883 355 125 52
05-21 33° 62° 1705 898 360 125 52
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 70° 1739 923 375 132 53
05-23 53° 71° 1780 953 395 144 61
05-24 50° 60° 1812 976 408 149 61
05-25 47° 81° 1854 1008 430 163 69
05-26 61° 84° 1905 1048 460 185 87
05-27 55° 75° 1948 1082 484 201 97
05-28 45° 67° 1982 1106 498 207 99
05-29 44° 77° 2021 1134 516 217 104
05-30 50° 71° 2060 1163 535 228 110
05-31 41° 71° 2094 1187 549 234 111
06-01 41° 77° 2131 1214 566 243 115
06-02 41° 75° 2167 1240 582 251 118
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 44° 80° 2206 1270 602 263 125
06-04 50° 85° 2252 1305 627 280 137
06-05 60° 76° 2298 1341 653 298 150
06-06 59° 76° 2343 1376 678 315 162
06-07 50° 77° 2384 1408 700 329 171
06-08 55° 86° 2433 1447 728 349 186
06-09 61° 71° 2477 1481 753 366 198
06-10 60° 84° 2528 1521 783 388 215
06-11 64° 84° 2580 1563 815 412 234
06-12 56° 74° 2622 1596 838 427 244
06-13 58° 77° 2668 1631 863 444 256
06-14 53° 65° 2704 1658 880 453 260
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 51° 68° 2742 1685 897 462 264
06-16 51° 68° 2779 1713 914 472 268
06-17 51° 70° 2817 1741 933 482 274
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
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
03-10 30° 59° 152 35 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
03-22 16° 40° 344 118 30 8 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
04-03 35° 48° 489 154 30 8 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
04-15 33° 46° 693 244 54 16 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
04-27 29° 64° 993 425 118 24 3
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
05-09 29° 66° 1323 635 208 52 11
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
05-21 48° 55° 1743 934 387 147 72
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
06-02 41° 78° 2126 1197 530 202 97
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
06-14 50° 72° 2609 1561 774 350 185
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
06-26 62° 74° 3213 2044 1137 617 392
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
07-08 52° 82° 3809 2521 1494 878 593
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
07-20 61° 74° 4373 2965 1818 1105 761
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
08-01 48° 74° 4965 3436 2169 1361 956
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
08-13 60° 78° 5573 3925 2538 1634 1169
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
08-25 54° 65° 6117 4349 2842 1841 1317
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
09-06 47° 56° 6537 4649 3022 1925 1352
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
09-18 58° 73° 7026 5017 3270 2078 1451
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
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
09-30 43° 80° 7518 5389 3522 2234 1547
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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