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MSU Annual Bluegrass Seedhead Embark Timer (GDD 22)
through Wed, Dec. 10. 2025

 
  

Grand Rapids, 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 19° 27° 1 0 0 0 0
02-16 21° 27° 2 0 0 0 0
02-17 3° 20° 2 0 0 0 0
02-18 -3° 14° 2 0 0 0 0
02-19 7° 19° 2 0 0 0 0
02-20 13° 27° 2 0 0 0 0
02-21 15° 31° 4 0 0 0 0
02-22 16° 29° 4 0 0 0 0
02-23 18° 34° 8 0 0 0 0
02-24 30° 43° 23 4 0 0 0
02-25 31° 48° 40 12 0 0 0
02-26 29° 38° 52 13 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 40° 66 18 0 0 0
02-28 28° 49° 82 24 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 18° 30° 84 24 0 0 0
03-02 18° 30° 86 24 0 0 0
03-03 19° 40° 93 24 0 0 0
03-04 36° 50° 114 35 1 0 0
03-05 28° 51° 132 42 1 0 0
03-06 25° 33° 139 42 1 0 0
03-07 29° 38° 151 44 1 0 0
03-08 19° 38° 157 44 1 0 0
03-09 32° 53° 177 54 1 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 60° 203 69 6 0 0
03-11 36° 53° 225 82 9 0 0
03-12 30° 49° 243 89 9 0 0
03-13 26° 61° 265 101 11 0 0
03-14 42° 76° 302 128 28 9 4
03-15 49° 69° 339 156 45 19 9
03-16 28° 47° 354 161 45 19 9
03-17 20° 48° 366 163 45 19 9
03-18 41° 67° 398 185 57 23 9
03-19 48° 67° 434 211 73 30 11
03-20 29° 45° 449 216 73 30 11
03-21 26° 55° 468 224 73 30 11
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 26° 48° 483 230 73 30 11
03-23 24° 47° 496 233 73 30 11
03-24 31° 38° 509 236 73 30 11
03-25 28° 38° 520 237 73 30 11
03-26 24° 45° 533 240 73 30 11
03-27 28° 49° 550 246 73 30 11
03-28 41° 69° 583 269 86 35 11
03-29 39° 65° 613 289 96 37 11
03-30 38° 63° 641 308 105 38 11
03-31 31° 40° 655 311 105 38 11
04-01 22° 41° 665 311 105 38 11
04-02 33° 57° 688 325 108 38 11
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 39° 60° 715 342 115 38 11
04-04 30° 51° 734 351 115 38 11
04-05 39° 51° 757 364 118 38 11
04-06 30° 46° 774 370 118 38 11
04-07 27° 39° 785 372 118 38 11
04-08 23° 35° 792 372 118 38 11
04-09 25° 47° 806 376 118 38 11
04-10 34° 42° 822 382 118 38 11
04-11 29° 53° 841 391 118 38 11
04-12 29° 58° 863 402 120 38 11
04-13 45° 61° 894 423 131 41 11
04-14 48° 62° 927 447 144 46 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 36° 47° 947 457 144 46 12
04-16 34° 50° 967 467 144 46 12
04-17 30° 65° 993 482 150 46 12
04-18 55° 68° 1032 511 169 58 18
04-19 43° 67° 1064 534 182 62 18
04-20 36° 55° 1088 547 185 62 18
04-21 44° 58° 1117 566 194 63 18
04-22 36° 62° 1144 583 201 63 18
04-23 44° 68° 1177 607 215 69 19
04-24 48° 78° 1219 638 236 82 27
04-25 50° 77° 1260 669 257 96 35
04-26 43° 60° 1289 688 266 97 35
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 36° 68° 1319 708 276 98 35
04-28 48° 78° 1360 739 297 111 43
04-29 47° 76° 1399 769 316 123 49
04-30 36° 61° 1426 785 323 123 49
05-01 47° 66° 1460 810 338 129 51
05-02 42° 56° 1487 827 344 129 51
05-03 39° 60° 1515 844 352 129 51
05-04 40° 63° 1544 864 362 131 51
05-05 49° 67° 1580 890 378 139 54
05-06 51° 65° 1616 916 393 147 57
05-07 44° 77° 1655 944 412 157 62
05-08 45° 61° 1685 965 423 160 62
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 33° 66° 1713 983 430 160 62
05-10 44° 74° 1750 1009 447 169 66
05-11 41° 72° 1785 1034 462 176 68
05-12 46° 83° 1827 1067 485 191 78
05-13 63° 73° 1874 1103 511 209 91
05-14 63° 77° 1921 1141 539 229 106
05-15 60° 85° 1972 1182 569 251 123
05-16 56° 83° 2019 1219 597 270 138
05-17 51° 60° 2053 1243 610 276 138
05-18 48° 60° 2085 1265 622 280 138
05-19 42° 55° 2112 1281 629 280 138
05-20 42° 49° 2135 1295 632 280 138
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 47° 49° 2162 1311 639 280 138
05-22 45° 56° 2190 1330 648 281 138
05-23 39° 53° 2215 1344 652 281 138
05-24 38° 60° 2242 1361 659 281 138
05-25 40° 66° 2273 1382 670 284 138
05-26 42° 72° 2307 1407 684 291 140
05-27 53° 73° 2348 1438 705 304 148
05-28 56° 64° 2386 1466 723 314 153
05-29 52° 67° 2424 1493 741 323 157
05-30 48° 68° 2460 1519 757 331 161
05-31 44° 61° 2490 1540 767 334 161
06-01 36° 66° 2519 1559 777 335 161
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 39° 77° 2555 1585 792 343 163
06-03 59° 86° 2606 1625 823 365 181
06-04 61° 78° 2653 1662 850 384 195
06-05 56° 77° 2698 1697 875 401 207
06-06 55° 79° 2742 1732 900 418 219
06-07 52° 79° 2786 1766 923 434 229
06-08 59° 78° 2833 1803 950 452 243
06-09 55° 74° 2876 1835 973 467 253
06-10 52° 66° 2913 1862 990 476 257
06-11 50° 83° 2957 1896 1014 492 268
06-12 64° 76° 3005 1934 1042 512 283
06-13 59° 74° 3049 1969 1066 529 294
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 54° 79° 3094 2003 1091 545 306
06-15 57° 80° 3141 2040 1118 564 320
06-16 61° 84° 3191 2081 1148 586 337
06-17 66° 87° 3245 2125 1183 613 359
06-18 68° 79° 3297 2167 1214 637 377
06-19 63° 77° 3345 2205 1242 657 392
06-20 61° 80° 3393 2243 1271 677 408
06-21 74° 93° 3455 2294 1312 710 436
06-22 79° 93° 3519 2348 1356 746 467
06-23 77° 94° 3582 2402 1399 781 497
06-24 71° 91° 3641 2451 1438 812 523
06-25 71° 78° 3694 2493 1471 837 543
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 90° 3750 2539 1507 865 566
06-27 71° 87° 3807 2586 1544 894 590
06-28 65° 80° 3858 2627 1575 917 608
06-29 61° 90° 3911 2671 1609 943 629
06-30 72° 84° 3967 2717 1644 971 651
07-01 65° 81° 4018 2758 1676 994 670
07-02 65° 86° 4072 2801 1709 1019 690
07-03 63° 86° 4125 2844 1742 1044 710
07-04 66° 87° 4179 2889 1776 1071 731
07-05 71° 91° 4238 2938 1816 1102 758
07-06 70° 81° 4292 2982 1849 1128 778
07-07 63° 80° 4342 3022 1879 1150 795
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 59° 84° 4391 3061 1908 1171 811
07-09 67° 83° 4444 3104 1941 1196 831
07-10 60° 83° 4494 3144 1971 1218 848
07-11 65° 81° 4545 3184 2002 1240 866
07-12 72° 81° 4599 3229 2036 1267 887
07-13 65° 82° 4651 3270 2068 1290 906
07-14 58° 85° 4700 3310 2097 1312 922
07-15 59° 90° 4753 3352 2130 1336 942
07-16 70° 85° 4808 3398 2165 1364 964
07-17 59° 74° 4853 3433 2190 1380 976
07-18 54° 79° 4897 3467 2215 1397 988
07-19 63° 80° 4947 3506 2244 1418 1004
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 67° 80° 4998 3548 2275 1442 1022
07-21 56° 81° 5045 3584 2302 1460 1036
07-22 60° 84° 5095 3624 2332 1482 1053
07-23 63° 91° 5150 3669 2367 1509 1075
07-24 74° 90° 5210 3719 2407 1541 1102
07-25 70° 84° 5265 3764 2442 1568 1124
07-26 71° 82° 5319 3809 2476 1595 1145
07-27 71° 92° 5379 3858 2516 1626 1172
07-28 70° 90° 5437 3906 2554 1656 1197
07-29 66° 90° 5493 3952 2590 1684 1220
07-30 63° 82° 5543 3993 2621 1707 1238
07-31 59° 77° 5589 4029 2646 1725 1250
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 56° 78° 5634 4064 2671 1742 1262
08-02 51° 79° 5677 4097 2695 1757 1273
08-03 55° 81° 5723 4133 2721 1775 1286
08-04 58° 81° 5771 4171 2748 1794 1300
08-05 62° 83° 5821 4211 2778 1817 1317
08-06 62° 86° 5873 4253 2810 1841 1336
08-07 66° 89° 5928 4298 2846 1868 1359
08-08 71° 89° 5987 4346 2884 1898 1384
08-09 70° 92° 6045 4395 2923 1929 1410
08-10 69° 91° 6103 4443 2961 1959 1435
08-11 71° 84° 6159 4489 2996 1986 1457
08-12 68° 84° 6213 4533 3030 2013 1478
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 84° 6267 4577 3064 2039 1499
08-14 62° 82° 6317 4617 3095 2061 1517
08-15 65° 87° 6372 4661 3129 2087 1538
08-16 70° 89° 6429 4709 3166 2116 1562
08-17 67° 84° 6482 4752 3199 2142 1582
08-18 60° 82° 6531 4791 3229 2163 1599
08-19 65° 75° 6580 4829 3257 2183 1614
08-20 63° 78° 6628 4868 3285 2204 1629
08-21 60° 78° 6675 4905 3313 2223 1644
08-22 58° 80° 6722 4942 3339 2242 1657
08-23 63° 78° 6771 4980 3368 2262 1673
08-24 55° 70° 6811 5011 3388 2275 1680
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 68° 6850 5040 3407 2285 1686
08-26 46° 70° 6886 5066 3423 2293 1689
08-27 43° 74° 6922 5092 3440 2302 1693
08-28 56° 76° 6966 5126 3464 2318 1704
08-29 44° 67° 7000 5150 3477 2324 1704
08-30 42° 73° 7036 5176 3493 2331 1707
08-31 46° 77° 7075 5205 3513 2343 1714
09-01 51° 78° 7118 5237 3535 2357 1723
09-02 51° 79° 7160 5270 3558 2372 1733
09-03 55° 67° 7200 5299 3577 2383 1739
09-04 46° 62° 7232 5321 3589 2387 1739
09-05 52° 61° 7266 5346 3603 2394 1740
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 49° 60° 7299 5368 3616 2398 1740
09-07 42° 64° 7330 5389 3627 2401 1740
09-08 39° 67° 7361 5410 3638 2404 1740
09-09 44° 73° 7397 5437 3654 2412 1744
09-10 50° 77° 7439 5468 3676 2426 1752
09-11 53° 79° 7482 5502 3700 2442 1763
09-12 52° 80° 7526 5536 3724 2458 1774
09-13 56° 76° 7571 5570 3748 2474 1785
09-14 57° 83° 7619 5608 3776 2494 1800
09-15 56° 83° 7666 5646 3803 2514 1815
09-16 55° 81° 7712 5682 3829 2532 1828
09-17 51° 83° 7758 5717 3855 2549 1840
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 57° 84° 7806 5756 3884 2570 1856
09-19 62° 83° 7857 5796 3914 2592 1873
09-20 57° 81° 7904 5833 3941 2611 1887
09-21 60° 75° 7949 5869 3966 2629 1900
09-22 63° 77° 7997 5907 3994 2648 1915
09-23 62° 74° 8043 5943 4020 2666 1928
09-24 58° 73° 8087 5976 4044 2682 1938
09-25 57° 72° 8129 6009 4067 2697 1948
09-26 54° 77° 8173 6043 4090 2712 1959
09-27 54° 81° 8218 6078 4115 2730 1971
09-28 56° 77° 8263 6112 4140 2746 1982
09-29 48° 82° 8306 6145 4163 2761 1992
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 52° 80° 8350 6179 4187 2777 2003
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 27° 35° 9 0 0 0 0
02-16 20° 28° 11 0 0 0 0
02-17 15° 26° 11 0 0 0 0
02-18 23° 32° 16 0 0 0 0
02-19 16° 40° 22 0 0 0 0
02-20 27° 50° 38 7 0 0 0
02-21 37° 61° 66 24 7 0 0
02-22 31° 56° 87 35 9 0 0
02-23 25° 42° 99 37 9 0 0
02-24 13° 31° 99 37 9 0 0
02-25 25° 47° 113 41 9 0 0
02-26 31° 60° 137 55 13 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 53° 73° 178 86 33 13 8
02-28 22° 58° 195 94 33 13 8
02-29 15° 34° 198 94 33 13 8
03-01 26° 48° 213 99 33 13 8
03-02 39° 53° 237 113 37 13 8
03-03 38° 66° 268 133 48 15 8
03-04 50° 68° 304 160 65 24 12
03-05 43° 61° 334 180 74 26 12
03-06 36° 53° 357 192 77 26 12
03-07 31° 48° 374 200 77 26 12
03-08 38° 44° 394 209 77 26 12
03-09 31° 42° 409 214 77 26 12
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 38° 420 216 77 26 12
03-11 27° 59° 441 227 78 26 12
03-12 42° 67° 474 249 90 30 12
03-13 41° 69° 506 272 103 35 12
03-14 43° 57° 534 290 111 35 12
03-15 34° 48° 553 299 111 35 12
03-16 32° 52° 573 309 111 35 12
03-17 29° 38° 584 310 111 35 12
03-18 26° 32° 592 310 111 35 12
03-19 31° 44° 607 315 111 35 12
03-20 22° 34° 613 315 111 35 12
03-21 16° 35° 617 315 111 35 12
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 25° 31° 623 315 111 35 12
03-23 22° 35° 630 315 111 35 12
03-24 24° 38° 639 315 111 35 12
03-25 33° 65° 666 332 117 35 12
03-26 40° 61° 694 350 126 35 12
03-27 31° 37° 706 353 126 35 12
03-28 28° 42° 719 355 126 35 12
03-29 24° 50° 734 360 126 35 12
03-30 35° 43° 751 367 126 35 12
03-31 35° 45° 769 375 126 35 12
04-01 34° 51° 789 386 127 35 12
04-02 37° 44° 808 394 127 35 12
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 42° 825 401 127 35 12
04-04 35° 45° 843 409 127 35 12
04-05 34° 50° 863 419 127 35 12
04-06 30° 57° 885 431 128 35 12
04-07 33° 59° 909 445 133 35 12
04-08 43° 69° 943 469 147 42 13
04-09 47° 64° 977 493 161 48 14
04-10 38° 67° 1007 513 171 50 14
04-11 47° 55° 1036 532 180 51 14
04-12 46° 55° 1064 551 188 51 14
04-13 40° 58° 1091 568 195 51 14
04-14 51° 75° 1132 599 216 64 22
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 46° 68° 1167 623 231 71 24
04-16 46° 67° 1202 648 246 77 25
04-17 55° 67° 1241 677 264 88 31
04-18 48° 53° 1269 695 273 89 31
04-19 42° 51° 1293 709 277 89 31
04-20 36° 45° 1311 718 277 89 31
04-21 33° 48° 1329 726 277 89 31
04-22 35° 63° 1356 742 284 89 31
04-23 48° 61° 1389 765 296 93 31
04-24 36° 54° 1412 778 299 93 31
04-25 29° 57° 1433 789 300 93 31
04-26 36° 65° 1461 807 309 93 31
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 53° 77° 1504 841 332 109 41
04-28 57° 74° 1548 874 355 124 52
04-29 53° 69° 1587 903 375 135 58
04-30 47° 62° 1620 926 387 140 58
05-01 51° 71° 1659 955 406 151 64
05-02 49° 76° 1699 986 427 164 72
05-03 56° 71° 1741 1017 448 177 80
05-04 51° 78° 1783 1049 470 191 89
05-05 52° 69° 1822 1078 489 202 95
05-06 49° 70° 1859 1105 506 211 99
05-07 51° 67° 1896 1132 523 220 103
05-08 50° 73° 1935 1162 543 232 110
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 60° 1969 1185 557 237 110
05-10 44° 65° 2002 1208 569 242 110
05-11 49° 60° 2034 1230 581 246 110
05-12 39° 76° 2069 1256 597 254 113
05-13 61° 78° 2117 1294 625 274 128
05-14 55° 62° 2154 1320 642 282 132
05-15 50° 74° 2194 1351 662 295 139
05-16 48° 74° 2233 1380 681 306 145
05-17 59° 78° 2280 1416 707 324 159
05-18 48° 83° 2324 1450 731 340 169
05-19 60° 84° 2374 1490 761 362 186
05-20 52° 82° 2418 1524 786 378 198
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 57° 85° 2467 1563 815 399 214
05-22 61° 78° 2515 1601 842 419 229
05-23 53° 76° 2558 1634 865 434 238
05-24 51° 80° 2601 1667 889 449 249
05-25 55° 71° 2642 1698 910 462 257
05-26 51° 76° 2684 1730 931 476 265
05-27 55° 64° 2721 1757 949 485 270
05-28 54° 67° 2760 1786 967 496 275
05-29 54° 70° 2800 1816 987 508 283
05-30 44° 71° 2836 1842 1003 516 286
05-31 46° 79° 2876 1872 1024 528 293
06-01 54° 76° 2919 1905 1047 543 303
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 60° 75° 2965 1941 1072 561 315
06-03 54° 82° 3011 1977 1098 579 328
06-04 67° 84° 3064 2020 1132 604 349
06-05 63° 75° 3111 2057 1159 623 363
06-06 58° 71° 3154 2090 1181 638 372
06-07 56° 69° 3195 2121 1202 651 380
06-08 51° 70° 3233 2149 1221 661 386
06-09 51° 74° 3274 2180 1241 674 393
06-10 50° 70° 3312 2208 1259 684 398
06-11 43° 72° 3347 2234 1275 692 401
06-12 58° 83° 3396 2272 1303 712 416
06-13 68° 84° 3450 2316 1337 738 438
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 60° 80° 3498 2354 1365 758 453
06-15 56° 80° 3544 2390 1392 776 466
06-16 64° 88° 3598 2434 1426 802 487
06-17 70° 92° 3657 2483 1464 833 513
06-18 76° 89° 3718 2534 1505 866 540
06-19 77° 91° 3780 2586 1547 900 569
06-20 71° 86° 3836 2632 1584 928 593
06-21 69° 87° 3892 2678 1620 956 616
06-22 72° 84° 3948 2724 1656 984 639
06-23 65° 74° 3996 2762 1683 1004 653
06-24 57° 79° 4042 2798 1709 1022 667
06-25 66° 80° 4093 2839 1740 1045 685
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 81° 4145 2881 1772 1069 703
06-27 54° 71° 4185 2912 1793 1082 711
06-28 60° 73° 4230 2946 1817 1098 723
06-29 67° 80° 4282 2988 1849 1122 741
06-30 56° 75° 4324 3020 1871 1136 751
07-01 45° 76° 4362 3049 1890 1147 756
07-02 55° 70° 4403 3080 1911 1160 764
07-03 68° 81° 4456 3122 1943 1184 784
07-04 66° 83° 4508 3164 1976 1208 803
07-05 62° 81° 4558 3204 2005 1230 819
07-06 63° 74° 4604 3240 2031 1248 833
07-07 57° 83° 4652 3278 2059 1268 848
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 67° 84° 4705 3321 2093 1293 868
07-09 67° 83° 4758 3365 2126 1319 888
07-10 67° 75° 4808 3404 2155 1340 904
07-11 60° 81° 4857 3443 2184 1361 920
07-12 64° 84° 4909 3485 2216 1385 939
07-13 61° 87° 4961 3527 2249 1409 959
07-14 69° 84° 5015 3572 2283 1436 980
07-15 68° 83° 5069 3615 2316 1461 1001
07-16 67° 78° 5119 3656 2347 1484 1018
07-17 63° 78° 5168 3694 2376 1504 1034
07-18 55° 74° 5211 3727 2398 1519 1043
07-19 51° 80° 5254 3760 2421 1534 1054
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 55° 80° 5300 3796 2447 1552 1066
07-21 59° 82° 5348 3834 2475 1572 1082
07-22 61° 82° 5398 3874 2505 1594 1099
07-23 56° 82° 5445 3911 2532 1613 1113
07-24 64° 76° 5493 3949 2560 1633 1128
07-25 55° 78° 5537 3983 2585 1649 1139
07-26 54° 82° 5583 4019 2611 1667 1152
07-27 57° 84° 5631 4058 2639 1688 1167
07-28 59° 86° 5682 4098 2670 1710 1185
07-29 71° 87° 5739 4145 2706 1739 1208
07-30 69° 83° 5793 4189 2740 1765 1230
07-31 67° 86° 5847 4233 2775 1791 1251
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 85° 5902 4278 2809 1818 1273
08-02 71° 87° 5959 4325 2846 1847 1297
08-03 67° 88° 6014 4370 2882 1874 1319
08-04 64° 87° 6068 4414 2915 1900 1339
08-05 69° 80° 6120 4456 2948 1924 1359
08-06 60° 73° 6165 4491 2972 1941 1370
08-07 57° 79° 6210 4527 2998 1959 1383
08-08 56° 79° 6256 4562 3024 1976 1396
08-09 61° 72° 6301 4597 3048 1993 1407
08-10 56° 69° 6341 4627 3068 2005 1415
08-11 57° 75° 6385 4661 3093 2021 1426
08-12 56° 80° 6431 4697 3118 2039 1439
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 83° 6479 4735 3146 2059 1453
08-14 57° 84° 6527 4773 3174 2079 1469
08-15 61° 78° 6575 4811 3202 2099 1483
08-16 65° 82° 6626 4852 3234 2122 1502
08-17 67° 76° 6675 4892 3263 2144 1518
08-18 67° 77° 6725 4931 3293 2165 1535
08-19 57° 73° 6768 4965 3316 2181 1545
08-20 50° 70° 6806 4993 3334 2191 1550
08-21 47° 74° 6845 5021 3352 2201 1555
08-22 49° 75° 6884 5051 3372 2213 1562
08-23 51° 77° 6927 5083 3394 2227 1571
08-24 56° 83° 6975 5121 3422 2247 1586
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 88° 7029 5166 3457 2274 1608
08-26 73° 90° 7089 5215 3497 2305 1635
08-27 74° 89° 7149 5265 3536 2337 1661
08-28 69° 82° 7202 5308 3570 2362 1682
08-29 66° 81° 7253 5349 3601 2385 1700
08-30 69° 81° 7306 5393 3634 2411 1720
08-31 59° 80° 7354 5430 3661 2430 1735
09-01 57° 75° 7398 5464 3686 2446 1746
09-02 47° 73° 7436 5493 3704 2457 1751
09-03 48° 76° 7476 5523 3724 2469 1758
09-04 49° 80° 7519 5555 3747 2483 1768
09-05 54° 83° 7566 5592 3773 2502 1781
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 54° 67° 7604 5620 3792 2512 1787
09-07 46° 62° 7636 5642 3804 2516 1787
09-08 41° 68° 7669 5665 3816 2521 1787
09-09 57° 77° 7714 5700 3841 2538 1799
09-10 49° 80° 7756 5732 3864 2552 1808
09-11 52° 84° 7802 5769 3890 2571 1822
09-12 53° 86° 7850 5806 3917 2590 1836
09-13 58° 85° 7899 5845 3947 2611 1852
09-14 57° 86° 7949 5885 3976 2633 1869
09-15 58° 88° 8000 5926 4007 2656 1887
09-16 56° 87° 8049 5965 4037 2677 1903
09-17 54° 83° 8096 6002 4063 2696 1917
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 52° 83° 8141 6038 4089 2714 1930
09-19 55° 85° 8189 6075 4116 2733 1944
09-20 63° 78° 8238 6114 4145 2754 1960
09-21 59° 85° 8287 6154 4175 2776 1977
09-22 63° 70° 8332 6188 4199 2792 1988
09-23 52° 67° 8370 6216 4217 2802 1993
09-24 56° 67° 8409 6245 4237 2813 1999
09-25 56° 73° 8452 6278 4259 2828 2009
09-26 49° 76° 8492 6308 4280 2840 2016
09-27 54° 75° 8535 6341 4303 2855 2026
09-28 61° 77° 8582 6379 4330 2875 2041
09-29 60° 81° 8631 6417 4359 2895 2057
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 56° 78° 8676 6453 4384 2913 2069

 

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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