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Crabgrass Germination Prediction (GDD 50)
forecast for Thu, Dec. 18. 2025

 
  

Canton, 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 21° 33° 5 0 0 0 0
02-16 21° 30° 8 0 0 0 0
02-17 6° 22° 8 0 0 0 0
02-18 0° 17° 8 0 0 0 0
02-19 4° 18° 8 0 0 0 0
02-20 13° 23° 8 0 0 0 0
02-21 20° 32° 12 0 0 0 0
02-22 17° 30° 14 0 0 0 0
02-23 22° 36° 21 0 0 0 0
02-24 32° 51° 40 10 0 0 0
02-25 37° 55° 65 24 4 0 0
02-26 29° 37° 76 25 4 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 44° 93 32 4 0 0
02-28 29° 56° 114 43 5 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 23° 40° 123 43 5 0 0
03-02 17° 30° 125 43 5 0 0
03-03 20° 40° 133 43 5 0 0
03-04 34° 48° 152 52 5 0 0
03-05 36° 56° 175 66 9 0 0
03-06 27° 36° 185 66 9 0 0
03-07 27° 39° 196 67 9 0 0
03-08 23° 38° 205 67 9 0 0
03-09 32° 55° 226 79 11 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 65° 254 96 18 0 0
03-11 34° 58° 278 111 22 0 0
03-12 29° 48° 295 117 22 0 0
03-13 28° 58° 315 128 23 0 0
03-14 34° 71° 346 148 34 3 0
03-15 57° 73° 389 181 57 18 10
03-16 32° 58° 412 195 60 18 10
03-17 27° 45° 427 199 60 18 10
03-18 35° 69° 457 219 70 20 10
03-19 55° 73° 499 251 92 34 19
03-20 33° 59° 523 265 96 34 19
03-21 27° 53° 540 273 96 34 19
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 29° 48° 557 280 96 34 19
03-23 23° 39° 566 280 96 34 19
03-24 33° 43° 582 286 96 34 19
03-25 29° 46° 598 291 96 34 19
03-26 29° 45° 613 296 96 34 19
03-27 26° 56° 632 306 96 34 19
03-28 42° 65° 663 327 107 37 19
03-29 60° 68° 705 359 129 51 28
03-30 52° 68° 743 387 147 61 33
03-31 40° 58° 770 404 154 61 33
04-01 25° 43° 782 406 154 61 33
04-02 34° 49° 802 416 154 61 33
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 47° 65° 836 440 168 67 34
04-04 38° 52° 859 452 171 67 34
04-05 43° 49° 882 466 174 67 34
04-06 36° 47° 902 475 174 67 34
04-07 28° 47° 917 481 174 67 34
04-08 24° 38° 926 481 174 67 34
04-09 25° 45° 939 484 174 67 34
04-10 33° 37° 952 487 174 67 34
04-11 31° 52° 972 497 174 67 34
04-12 29° 56° 993 507 175 67 34
04-13 39° 57° 1018 523 181 67 34
04-14 46° 72° 1055 550 198 76 38
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 41° 53° 1080 565 203 76 38
04-16 36° 53° 1103 577 205 76 38
04-17 30° 60° 1126 590 208 76 38
04-18 49° 83° 1170 624 232 92 49
04-19 52° 70° 1209 653 251 103 55
04-20 41° 58° 1236 671 259 103 55
04-21 47° 73° 1274 699 277 113 60
04-22 43° 66° 1307 721 289 117 60
04-23 47° 78° 1347 752 310 130 67
04-24 47° 83° 1390 785 333 145 77
04-25 54° 76° 1433 818 356 160 87
04-26 44° 62° 1464 838 366 162 87
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 37° 66° 1493 858 376 164 87
04-28 42° 73° 1529 883 391 171 89
04-29 54° 84° 1576 920 418 190 103
04-30 39° 62° 1604 939 426 191 103
05-01 45° 70° 1640 964 442 198 106
05-02 55° 70° 1680 995 463 211 114
05-03 46° 54° 1709 1013 471 211 114
05-04 43° 52° 1734 1029 477 211 114
05-05 48° 67° 1770 1055 492 219 117
05-06 54° 60° 1805 1079 507 226 119
05-07 51° 76° 1846 1111 528 239 127
05-08 44° 59° 1876 1130 538 241 127
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 35° 65° 1904 1149 547 241 127
05-10 45° 80° 1944 1179 567 254 134
05-11 45° 67° 1979 1203 581 260 135
05-12 45° 80° 2019 1233 601 272 142
05-13 62° 69° 2062 1267 625 287 153
05-14 59° 76° 2108 1302 650 305 165
05-15 59° 81° 2156 1341 678 325 181
05-16 59° 83° 2205 1380 708 346 197
05-17 58° 72° 2248 1413 730 361 207
05-18 52° 66° 2285 1440 748 370 211
05-19 48° 60° 2317 1462 760 375 211
05-20 40° 55° 2343 1478 765 375 211
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 49° 53° 2372 1496 774 375 211
05-22 49° 53° 2401 1515 783 376 211
05-23 42° 55° 2427 1532 789 376 211
05-24 43° 62° 2457 1552 800 379 211
05-25 40° 66° 2489 1573 811 382 211
05-26 43° 70° 2523 1598 826 389 212
05-27 51° 71° 2563 1627 845 400 219
05-28 53° 59° 2597 1651 859 406 220
05-29 55° 67° 2635 1680 878 417 225
05-30 50° 76° 2677 1711 899 430 234
05-31 52° 64° 2712 1737 915 438 237
06-01 42° 68° 2745 1760 928 443 237
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 44° 79° 2785 1790 948 455 243
06-03 54° 88° 2834 1829 977 475 259
06-04 66° 85° 2888 1872 1010 501 280
06-05 56° 66° 2926 1901 1029 512 286
06-06 58° 75° 2971 1935 1053 528 297
06-07 55° 78° 3015 1970 1078 545 308
06-08 58° 77° 3061 2006 1104 562 321
06-09 59° 78° 3108 2042 1130 581 335
06-10 52° 74° 3149 2073 1151 594 343
06-11 55° 85° 3197 2111 1179 614 358
06-12 62° 77° 3244 2149 1207 633 372
06-13 58° 72° 3287 2182 1230 648 382
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 75° 3331 2216 1254 665 393
06-15 55° 81° 3377 2252 1280 683 407
06-16 58° 82° 3425 2290 1308 703 421
06-17 62° 87° 3478 2333 1341 727 441
06-18 68° 82° 3531 2376 1374 752 461
06-19 63° 76° 3578 2413 1401 772 475
06-20 59° 80° 3626 2451 1429 791 490
06-21 68° 92° 3684 2498 1466 821 515
06-22 78° 95° 3749 2553 1511 858 547
06-23 75° 96° 3812 2607 1554 893 577
06-24 76° 94° 3875 2660 1597 928 607
06-25 72° 85° 3932 2706 1634 957 631
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 84° 3985 2749 1667 982 651
06-27 71° 91° 4044 2798 1706 1013 677
06-28 70° 83° 4098 2843 1741 1040 698
06-29 63° 87° 4151 2886 1774 1065 718
06-30 69° 84° 4206 2930 1808 1091 740
07-01 72° 85° 4262 2977 1845 1120 763
07-02 62° 87° 4315 3019 1877 1144 783
07-03 67° 87° 4370 3065 1913 1171 805
07-04 62° 89° 4424 3108 1946 1197 826
07-05 68° 92° 4481 3156 1984 1227 851
07-06 71° 93° 4542 3206 2024 1259 878
07-07 66° 77° 4591 3246 2054 1281 894
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 56° 85° 4640 3284 2082 1301 910
07-09 69° 80° 4692 3327 2115 1326 929
07-10 64° 86° 4745 3370 2148 1351 949
07-11 66° 86° 4799 3414 2182 1376 970
07-12 72° 88° 4857 3462 2219 1406 995
07-13 70° 88° 4914 3509 2257 1436 1019
07-14 65° 85° 4967 3552 2290 1461 1039
07-15 62° 89° 5021 3595 2323 1486 1060
07-16 71° 85° 5077 3641 2359 1514 1083
07-17 68° 77° 5127 3682 2389 1536 1100
07-18 57° 77° 5172 3717 2415 1553 1112
07-19 58° 83° 5220 3755 2443 1574 1128
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 66° 78° 5270 3795 2473 1596 1145
07-21 57° 79° 5317 3831 2499 1614 1158
07-22 54° 82° 5363 3867 2525 1632 1171
07-23 57° 88° 5413 3908 2556 1655 1188
07-24 72° 96° 5475 3960 2598 1689 1217
07-25 72° 85° 5531 4006 2634 1717 1240
07-26 72° 81° 5586 4050 2668 1743 1262
07-27 73° 90° 5646 4100 2708 1775 1289
07-28 69° 88° 5702 4147 2745 1804 1312
07-29 69° 87° 5758 4193 2781 1832 1335
07-30 64° 86° 5811 4236 2814 1857 1355
07-31 59° 74° 5856 4270 2838 1873 1367
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 56° 76° 5900 4304 2862 1889 1378
08-02 53° 77° 5943 4338 2886 1904 1388
08-03 55° 79° 5988 4372 2910 1921 1400
08-04 57° 81° 6035 4409 2937 1940 1414
08-05 63° 83° 6086 4450 2968 1963 1432
08-06 65° 83° 6138 4493 3000 1987 1451
08-07 65° 84° 6190 4535 3033 2012 1470
08-08 64° 86° 6243 4578 3066 2037 1490
08-09 68° 88° 6299 4624 3102 2064 1513
08-10 68° 91° 6356 4671 3139 2094 1537
08-11 69° 90° 6414 4718 3176 2123 1562
08-12 70° 90° 6472 4767 3214 2153 1587
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 83° 6526 4811 3249 2179 1608
08-14 63° 84° 6577 4852 3280 2203 1626
08-15 63° 85° 6629 4894 3312 2227 1645
08-16 66° 89° 6685 4939 3347 2254 1668
08-17 65° 82° 6736 4981 3379 2278 1687
08-18 55° 79° 6781 5016 3404 2295 1699
08-19 62° 78° 6830 5054 3432 2315 1714
08-20 65° 70° 6875 5090 3458 2333 1727
08-21 64° 75° 6923 5127 3485 2352 1741
08-22 56° 81° 6969 5164 3511 2370 1754
08-23 62° 78° 7017 5202 3540 2390 1769
08-24 55° 75° 7060 5235 3563 2406 1779
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 53° 68° 7099 5264 3581 2416 1785
08-26 48° 70° 7136 5291 3599 2425 1789
08-27 47° 74° 7175 5319 3617 2436 1795
08-28 51° 71° 7214 5349 3636 2447 1801
08-29 48° 67° 7249 5374 3652 2455 1803
08-30 44° 72° 7285 5400 3668 2463 1806
08-31 46° 76° 7325 5429 3687 2474 1813
09-01 48° 79° 7366 5461 3709 2488 1821
09-02 51° 80° 7409 5494 3732 2503 1832
09-03 50° 82° 7453 5528 3756 2519 1842
09-04 52° 67° 7491 5556 3774 2529 1847
09-05 45° 72° 7528 5583 3791 2537 1851
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 51° 65° 7564 5609 3807 2545 1854
09-07 42° 67° 7597 5632 3819 2550 1854
09-08 43° 70° 7631 5656 3834 2557 1856
09-09 44° 75° 7669 5683 3851 2566 1860
09-10 49° 78° 7710 5715 3873 2580 1869
09-11 50° 80° 7753 5748 3896 2595 1879
09-12 51° 81° 7797 5782 3920 2611 1890
09-13 53° 78° 7841 5816 3943 2626 1900
09-14 52° 82° 7886 5851 3969 2643 1912
09-15 55° 82° 7933 5887 3995 2662 1926
09-16 53° 84° 7979 5924 4021 2680 1939
09-17 53° 83° 8025 5960 4048 2699 1952
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 54° 87° 8074 5998 4076 2719 1968
09-19 62° 80° 8123 6037 4105 2740 1984
09-20 57° 80° 8169 6074 4132 2759 1998
09-21 59° 74° 8214 6108 4156 2775 2009
09-22 62° 75° 8261 6145 4183 2794 2023
09-23 60° 74° 8305 6180 4208 2811 2035
09-24 64° 74° 8353 6217 4235 2830 2049
09-25 61° 75° 8399 6254 4261 2848 2062
09-26 56° 79° 8444 6289 4287 2866 2075
09-27 55° 85° 8492 6327 4315 2886 2089
09-28 59° 81° 8540 6365 4343 2905 2104
09-29 51° 81° 8584 6399 4367 2921 2115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 81° 8629 6434 4391 2938 2127
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 28° 39° 11 1 0 0 0
02-16 26° 31° 17 1 0 0 0
02-17 17° 28° 18 1 0 0 0
02-18 17° 37° 23 1 0 0 0
02-19 19° 38° 30 1 0 0 0
02-20 22° 48° 43 4 0 0 0
02-21 29° 61° 66 17 3 0 0
02-22 36° 53° 88 30 5 0 0
02-23 27° 52° 106 37 5 0 0
02-24 20° 33° 110 37 5 0 0
02-25 26° 50° 126 42 5 0 0
02-26 34° 55° 148 55 8 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 41° 73° 183 80 23 7 2
02-28 23° 62° 204 90 23 7 2
02-29 22° 38° 212 90 23 7 2
03-01 26° 45° 225 94 23 7 2
03-02 37° 51° 247 106 25 7 2
03-03 35° 60° 272 121 31 7 2
03-04 40° 73° 307 146 45 14 4
03-05 43° 59° 336 165 55 15 4
03-06 39° 47° 357 176 55 15 4
03-07 39° 53° 381 189 59 15 4
03-08 41° 52° 405 204 63 15 4
03-09 36° 54° 428 217 67 15 4
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 39° 441 220 67 15 4
03-11 28° 55° 461 230 67 15 4
03-12 41° 68° 494 253 79 20 4
03-13 50° 71° 532 281 98 30 9
03-14 47° 58° 563 301 108 33 9
03-15 40° 52° 587 316 112 33 9
03-16 34° 59° 612 330 117 33 9
03-17 30° 43° 626 335 117 33 9
03-18 26° 35° 635 335 117 33 9
03-19 30° 47° 651 342 117 33 9
03-20 26° 39° 662 342 117 33 9
03-21 20° 36° 668 342 117 33 9
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 27° 33° 676 342 117 33 9
03-23 26° 36° 685 342 117 33 9
03-24 24° 39° 695 342 117 33 9
03-25 32° 63° 720 357 123 33 9
03-26 45° 59° 751 378 133 35 9
03-27 30° 43° 765 382 133 35 9
03-28 26° 48° 780 387 133 35 9
03-29 28° 53° 798 395 133 35 9
03-30 35° 44° 815 402 133 35 9
03-31 38° 44° 835 412 133 35 9
04-01 38° 54° 858 425 137 35 9
04-02 40° 47° 880 437 138 35 9
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 38° 48° 900 447 138 35 9
04-04 34° 49° 920 457 138 35 9
04-05 35° 47° 938 465 138 35 9
04-06 37° 58° 964 481 144 35 9
04-07 31° 57° 986 493 146 35 9
04-08 46° 73° 1024 521 164 44 13
04-09 47° 75° 1062 549 182 55 19
04-10 44° 65° 1095 572 195 60 19
04-11 47° 57° 1125 592 205 62 19
04-12 45° 52° 1152 609 212 62 19
04-13 41° 62° 1181 628 221 64 19
04-14 48° 79° 1223 660 243 77 28
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 65° 1257 684 257 83 29
04-16 45° 66° 1291 708 271 89 30
04-17 53° 72° 1332 739 292 102 37
04-18 52° 67° 1369 766 309 111 42
04-19 45° 59° 1399 786 319 113 42
04-20 38° 47° 1419 796 319 113 42
04-21 36° 45° 1438 805 319 113 42
04-22 33° 64° 1464 821 326 113 42
04-23 49° 57° 1495 842 337 116 42
04-24 35° 49° 1515 852 337 116 42
04-25 26° 54° 1533 860 337 116 42
04-26 34° 63° 1560 877 343 116 42
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 52° 81° 1604 911 368 133 53
04-28 63° 79° 1653 950 397 154 70
04-29 62° 80° 1703 990 426 175 86
04-30 56° 72° 1745 1022 448 189 95
05-01 49° 81° 1788 1055 472 205 105
05-02 49° 71° 1826 1083 490 215 111
05-03 58° 69° 1868 1115 511 229 119
05-04 55° 71° 1909 1146 532 242 127
05-05 56° 69° 1949 1176 553 254 135
05-06 48° 67° 1985 1202 569 262 137
05-07 47° 68° 2021 1228 584 269 140
05-08 54° 78° 2065 1262 608 285 151
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 58° 2097 1284 621 290 151
05-10 44° 64° 2129 1306 632 294 151
05-11 50° 56° 2160 1327 643 297 151
05-12 43° 70° 2194 1351 658 303 152
05-13 57° 81° 2241 1388 685 322 166
05-14 58° 72° 2285 1422 708 337 177
05-15 53° 75° 2327 1454 730 351 185
05-16 49° 77° 2368 1485 751 364 193
05-17 61° 75° 2414 1521 777 382 206
05-18 59° 78° 2460 1557 803 401 220
05-19 56° 88° 2510 1597 833 422 236
05-20 60° 87° 2561 1638 864 446 255
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 64° 88° 2615 1682 898 472 276
05-22 70° 86° 2671 1728 934 499 299
05-23 57° 80° 2717 1764 961 518 312
05-24 52° 81° 2761 1798 985 534 323
05-25 63° 80° 2811 1838 1015 556 340
05-26 54° 79° 2856 1873 1039 572 351
05-27 61° 67° 2897 1904 1061 586 360
05-28 56° 71° 2939 1936 1082 600 369
05-29 52° 67° 2976 1963 1100 609 373
05-30 44° 71° 3012 1989 1115 616 376
05-31 45° 76° 3050 2017 1134 627 381
06-01 51° 77° 3092 2049 1156 641 390
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 63° 74° 3139 2086 1182 659 404
06-03 55° 77° 3183 2120 1206 675 415
06-04 59° 84° 3232 2159 1236 697 431
06-05 68° 82° 3285 2202 1269 722 451
06-06 60° 78° 3332 2239 1296 741 465
06-07 58° 69° 3374 2271 1317 755 474
06-08 51° 77° 3416 2303 1340 769 483
06-09 54° 74° 3458 2335 1362 783 492
06-10 53° 68° 3497 2364 1380 793 497
06-11 45° 73° 3533 2390 1397 802 501
06-12 58° 85° 3583 2430 1426 823 518
06-13 70° 91° 3641 2478 1465 854 543
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 82° 3692 2519 1496 877 561
06-15 52° 79° 3736 2553 1519 892 572
06-16 56° 86° 3785 2592 1548 913 588
06-17 69° 94° 3844 2641 1588 945 614
06-18 74° 91° 3905 2692 1628 977 642
06-19 76° 90° 3966 2743 1669 1011 670
06-20 73° 89° 4025 2792 1708 1042 696
06-21 67° 88° 4080 2837 1744 1069 718
06-22 70° 91° 4139 2886 1783 1100 744
06-23 69° 82° 4193 2930 1816 1125 765
06-24 63° 81° 4243 2970 1846 1148 782
06-25 67° 82° 4295 3012 1879 1172 801
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 68° 77° 4346 3053 1909 1195 819
06-27 58° 74° 4390 3087 1934 1211 830
06-28 57° 72° 4433 3120 1956 1226 840
06-29 67° 88° 4488 3165 1992 1253 862
06-30 59° 79° 4535 3202 2018 1271 875
07-01 50° 75° 4575 3232 2038 1284 883
07-02 54° 79° 4619 3266 2063 1300 894
07-03 67° 86° 4674 3311 2097 1326 916
07-04 64° 83° 4725 3352 2129 1350 934
07-05 64° 79° 4775 3392 2158 1372 951
07-06 63° 79° 4824 3431 2187 1393 967
07-07 57° 85° 4873 3470 2216 1413 983
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 89° 4928 3515 2251 1441 1005
07-09 70° 82° 4982 3559 2285 1466 1026
07-10 64° 72° 5028 3595 2311 1484 1039
07-11 63° 82° 5078 3635 2342 1507 1056
07-12 66° 83° 5131 3678 2374 1532 1076
07-13 63° 87° 5184 3721 2408 1557 1096
07-14 70° 86° 5240 3767 2444 1585 1119
07-15 71° 88° 5298 3815 2481 1614 1143
07-16 69° 87° 5354 3861 2517 1642 1166
07-17 68° 82° 5407 3904 2550 1668 1187
07-18 58° 74° 5451 3938 2574 1684 1198
07-19 54° 79° 5495 3972 2599 1700 1209
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 56° 80° 5541 4008 2625 1718 1222
07-21 60° 83° 5591 4048 2655 1740 1239
07-22 64° 80° 5641 4088 2685 1762 1256
07-23 61° 83° 5692 4129 2715 1784 1274
07-24 66° 78° 5741 4168 2745 1806 1290
07-25 60° 79° 5789 4206 2773 1826 1305
07-26 57° 81° 5836 4243 2800 1845 1319
07-27 54° 84° 5883 4280 2827 1864 1333
07-28 59° 89° 5935 4322 2859 1888 1352
07-29 73° 83° 5991 4368 2895 1916 1375
07-30 69° 85° 6046 4413 2930 1943 1397
07-31 67° 90° 6103 4460 2966 1971 1421
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 68° 90° 6160 4507 3003 2000 1444
08-02 71° 80° 6213 4550 3037 2026 1465
08-03 68° 88° 6270 4597 3073 2054 1489
08-04 63° 89° 6324 4641 3107 2080 1510
08-05 70° 84° 6379 4686 3142 2108 1532
08-06 62° 74° 6425 4722 3168 2125 1545
08-07 60° 79° 6472 4759 3195 2145 1559
08-08 63° 82° 6523 4800 3226 2167 1576
08-09 64° 79° 6572 4839 3255 2188 1593
08-10 55° 73° 6614 4871 3277 2202 1601
08-11 54° 76° 6657 4904 3300 2217 1611
08-12 53° 81° 6701 4938 3325 2234 1623
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 56° 83° 6749 4976 3352 2253 1638
08-14 58° 83° 6797 5014 3381 2274 1653
08-15 58° 81° 6844 5051 3408 2293 1667
08-16 66° 80° 6895 5092 3439 2316 1685
08-17 67° 78° 6946 5133 3470 2339 1703
08-18 66° 78° 6996 5173 3500 2361 1720
08-19 57° 71° 7038 5205 3522 2375 1729
08-20 53° 71° 7078 5235 3542 2387 1736
08-21 47° 74° 7117 5264 3561 2398 1742
08-22 47° 78° 7158 5295 3581 2410 1750
08-23 50° 79° 7200 5327 3604 2425 1759
08-24 56° 85° 7248 5365 3632 2445 1774
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 89° 7303 5410 3667 2472 1796
08-26 67° 93° 7361 5458 3705 2502 1821
08-27 70° 94° 7421 5508 3745 2534 1848
08-28 70° 82° 7475 5552 3779 2560 1869
08-29 66° 79° 7526 5593 3809 2583 1887
08-30 66° 90° 7582 5639 3845 2610 1910
08-31 67° 82° 7635 5682 3878 2635 1930
09-01 61° 78° 7682 5719 3905 2655 1944
09-02 50° 71° 7720 5747 3924 2665 1949
09-03 46° 74° 7758 5775 3942 2675 1954
09-04 49° 78° 7800 5807 3963 2688 1963
09-05 52° 84° 7846 5843 3989 2707 1976
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 58° 71° 7888 5875 4011 2721 1985
09-07 46° 60° 7919 5896 4023 2724 1985
09-08 40° 71° 7953 5920 4036 2730 1985
09-09 52° 79° 7997 5954 4060 2745 1996
09-10 52° 81° 8041 5988 4085 2762 2008
09-11 56° 85° 8090 6027 4113 2782 2023
09-12 57° 85° 8139 6066 4142 2804 2039
09-13 59° 82° 8187 6104 4171 2824 2055
09-14 58° 82° 8235 6142 4199 2844 2070
09-15 58° 84° 8285 6182 4228 2865 2086
09-16 54° 82° 8330 6217 4254 2883 2099
09-17 52° 79° 8374 6251 4278 2899 2110
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 57° 82° 8421 6288 4305 2918 2124
09-19 56° 82° 8468 6325 4332 2937 2138
09-20 57° 85° 8517 6364 4361 2958 2154
09-21 60° 86° 8568 6405 4392 2981 2172
09-22 56° 84° 8616 6443 4420 3001 2187
09-23 60° 68° 8658 6475 4442 3015 2196
09-24 59° 69° 8700 6507 4464 3029 2205
09-25 62° 76° 8747 6544 4491 3048 2219
09-26 59° 72° 8791 6578 4514 3063 2229
09-27 59° 74° 8835 6612 4539 3080 2241
09-28 65° 68° 8879 6646 4563 3096 2252
09-29 65° 69° 8925 6682 4588 3114 2265
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 72° 8970 6717 4613 3131 2276

 

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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