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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MSU Annual Bluegrass Seedhead Embark Timer (GDD 22)
through Tue, Dec. 9. 2025

 
  

Cushman, MA

        

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 16° 26° 0 0 0 0 0
02-16 22° 33° 5 0 0 0 0
02-17 14° 24° 5 0 0 0 0
02-18 10° 20° 5 0 0 0 0
02-19 10° 25° 5 0 0 0 0
02-20 2° 29° 5 0 0 0 0
02-21 15° 28° 5 0 0 0 0
02-22 9° 33° 5 0 0 0 0
02-23 20° 36° 11 0 0 0 0
02-24 26° 41° 23 1 0 0 0
02-25 32° 47° 40 9 0 0 0
02-26 33° 44° 57 15 0 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 31° 40° 70 19 0 0 0
02-28 33° 38° 84 22 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 17° 51° 96 24 0 0 0
03-02 10° 22° 96 24 0 0 0
03-03 7° 29° 96 24 0 0 0
03-04 21° 43° 106 24 0 0 0
03-05 34° 52° 127 36 1 0 0
03-06 28° 51° 145 43 1 0 0
03-07 23° 36° 152 43 1 0 0
03-08 25° 33° 159 43 1 0 0
03-09 23° 39° 168 43 1 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 31° 56° 190 55 2 0 0
03-11 27° 61° 212 67 5 0 0
03-12 31° 46° 228 73 5 0 0
03-13 27° 49° 244 79 5 0 0
03-14 29° 58° 266 91 6 0 0
03-15 35° 54° 288 103 9 0 0
03-16 43° 62° 319 124 20 3 0
03-17 37° 59° 346 141 26 3 0
03-18 30° 52° 365 150 26 3 0
03-19 27° 64° 389 164 30 3 0
03-20 42° 61° 418 183 39 5 0
03-21 35° 48° 438 193 39 5 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 30° 58° 460 205 41 5 0
03-23 24° 38° 469 205 41 5 0
03-24 29° 35° 479 205 41 5 0
03-25 33° 46° 497 212 41 5 0
03-26 28° 45° 511 217 41 5 0
03-27 28° 45° 526 222 41 5 0
03-28 31° 54° 547 232 42 5 0
03-29 32° 46° 564 240 42 5 0
03-30 32° 40° 578 244 42 5 0
03-31 36° 61° 605 260 48 5 0
04-01 34° 55° 627 273 51 5 0
04-02 28° 46° 642 278 51 5 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 62° 669 294 57 5 0
04-04 47° 63° 702 318 70 10 0
04-05 38° 45° 722 327 70 10 0
04-06 38° 51° 744 340 73 10 0
04-07 34° 43° 760 346 73 10 0
04-08 28° 35° 770 346 73 10 0
04-09 27° 42° 783 348 73 10 0
04-10 26° 49° 798 354 73 10 0
04-11 32° 44° 814 360 73 10 0
04-12 32° 36° 826 362 73 10 0
04-13 35° 49° 846 372 73 10 0
04-14 36° 67° 876 392 83 11 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 44° 67° 910 416 97 17 1
04-16 37° 44° 928 424 97 17 1
04-17 37° 55° 952 438 101 17 1
04-18 30° 67° 979 455 107 17 1
04-19 54° 82° 1025 491 133 35 14
04-20 44° 65° 1057 513 146 40 14
04-21 32° 58° 1080 526 148 40 14
04-22 43° 74° 1116 552 165 48 17
04-23 46° 68° 1152 577 180 55 19
04-24 40° 76° 1188 604 196 64 23
04-25 52° 79° 1232 637 220 79 33
04-26 48° 64° 1266 661 234 85 34
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 42° 51° 1290 676 239 85 34
04-28 40° 73° 1325 700 253 92 36
04-29 42° 77° 1362 728 271 102 41
04-30 50° 66° 1399 754 287 110 44
05-01 42° 72° 1433 779 302 117 46
05-02 49° 77° 1474 810 323 130 54
05-03 58° 78° 1521 846 349 148 67
05-04 59° 68° 1562 878 371 161 75
05-05 52° 58° 1595 901 384 167 76
05-06 52° 62° 1631 927 399 174 78
05-07 55° 68° 1670 956 419 186 85
05-08 52° 73° 1711 987 439 198 92
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 46° 54° 1739 1005 448 198 92
05-10 46° 63° 1772 1028 460 203 92
05-11 47° 64° 1805 1051 473 208 93
05-12 37° 73° 1838 1074 486 213 93
05-13 50° 74° 1878 1104 506 225 100
05-14 52° 73° 1919 1134 527 238 107
05-15 60° 71° 1962 1168 551 254 118
05-16 63° 79° 2012 1208 580 275 134
05-17 61° 77° 2059 1245 607 294 148
05-18 54° 61° 2095 1271 623 302 151
05-19 47° 57° 2125 1290 633 304 151
05-20 43° 58° 2153 1309 641 304 151
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 44° 50° 2178 1324 647 304 151
05-22 41° 46° 2200 1336 649 304 151
05-23 41° 52° 2225 1351 653 304 151
05-24 47° 58° 2255 1371 664 307 151
05-25 48° 59° 2287 1393 675 310 151
05-26 44° 71° 2323 1419 691 318 154
05-27 45° 76° 2361 1447 710 329 160
05-28 50° 75° 2402 1478 730 342 167
05-29 54° 67° 2441 1506 749 352 173
05-30 57° 71° 2483 1539 771 366 182
05-31 49° 63° 2517 1563 785 372 183
06-01 48° 59° 2548 1584 797 376 183
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 43° 69° 2582 1608 810 381 184
06-03 44° 77° 2620 1636 829 392 189
06-04 52° 82° 2665 1671 854 409 201
06-05 59° 90° 2718 1714 886 434 221
06-06 66° 83° 2771 1757 919 458 241
06-07 59° 68° 2812 1788 940 472 249
06-08 56° 74° 2856 1821 964 487 259
06-09 58° 68° 2896 1852 985 500 267
06-10 57° 67° 2936 1882 1005 512 274
06-11 54° 78° 2980 1916 1028 528 285
06-12 60° 80° 3028 1954 1057 548 300
06-13 56° 74° 3071 1987 1080 563 310
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 57° 63° 3109 2015 1097 573 315
06-15 55° 70° 3150 2046 1118 585 323
06-16 53° 76° 3193 2078 1141 600 332
06-17 59° 66° 3233 2109 1162 613 340
06-18 64° 74° 3281 2147 1189 632 355
06-19 70° 87° 3337 2193 1226 661 378
06-20 65° 76° 3386 2232 1254 682 394
06-21 58° 83° 3435 2270 1283 702 409
06-22 68° 87° 3490 2316 1318 730 432
06-23 68° 94° 3549 2365 1357 761 458
06-24 72° 94° 3610 2416 1398 794 486
06-25 73° 91° 3670 2466 1438 825 513
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 60° 76° 3716 2502 1464 843 526
06-27 60° 72° 3760 2535 1488 859 536
06-28 58° 77° 3805 2571 1513 877 549
06-29 66° 80° 3856 2612 1544 900 567
06-30 59° 86° 3907 2652 1575 922 584
07-01 71° 89° 3964 2700 1613 952 609
07-02 70° 82° 4018 2744 1647 978 630
07-03 63° 82° 4069 2785 1677 1000 648
07-04 56° 77° 4113 2819 1702 1017 659
07-05 54° 81° 4159 2854 1727 1034 671
07-06 62° 89° 4212 2898 1761 1060 692
07-07 68° 86° 4267 2943 1796 1087 714
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 73° 87° 4325 2991 1833 1116 739
07-09 70° 85° 4380 3036 1869 1144 761
07-10 69° 77° 4431 3077 1899 1167 779
07-11 67° 82° 4484 3120 1932 1191 799
07-12 70° 81° 4537 3163 1966 1217 819
07-13 65° 82° 4589 3204 1997 1240 837
07-14 70° 82° 4642 3248 2031 1266 858
07-15 69° 88° 4699 3295 2067 1294 882
07-16 69° 91° 4757 3343 2105 1324 907
07-17 75° 87° 4816 3391 2144 1355 932
07-18 61° 77° 4863 3428 2171 1374 946
07-19 52° 82° 4907 3463 2196 1391 958
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 68° 86° 4962 3508 2231 1418 980
07-21 58° 75° 5007 3543 2255 1434 992
07-22 50° 76° 5048 3573 2276 1447 999
07-23 53° 81° 5093 3608 2301 1464 1011
07-24 63° 87° 5146 3651 2334 1489 1031
07-25 69° 87° 5202 3697 2370 1517 1054
07-26 61° 80° 5250 3736 2399 1538 1070
07-27 63° 74° 5297 3773 2425 1557 1084
07-28 68° 90° 5354 3820 2462 1585 1108
07-29 66° 92° 5411 3867 2499 1614 1132
07-30 66° 92° 5467 3913 2536 1643 1155
07-31 58° 73° 5511 3947 2559 1658 1166
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 57° 75° 5555 3980 2583 1674 1176
08-02 52° 76° 5597 4013 2605 1688 1186
08-03 51° 81° 5641 4047 2629 1704 1197
08-04 56° 83° 5689 4084 2657 1724 1211
08-05 61° 80° 5737 4123 2686 1745 1227
08-06 63° 78° 5786 4161 2714 1765 1242
08-07 62° 79° 5834 4200 2742 1786 1258
08-08 55° 80° 5880 4236 2768 1803 1271
08-09 54° 83° 5927 4272 2795 1822 1284
08-10 58° 87° 5977 4313 2825 1845 1302
08-11 62° 88° 6030 4356 2858 1870 1322
08-12 61° 88° 6082 4398 2891 1894 1341
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 64° 87° 6136 4442 2924 1919 1362
08-14 68° 87° 6191 4487 2960 1947 1384
08-15 62° 83° 6242 4528 2990 1969 1402
08-16 60° 83° 6291 4567 3020 1991 1418
08-17 66° 88° 6347 4612 3055 2018 1440
08-18 56° 73° 6389 4645 3078 2033 1450
08-19 51° 72° 6429 4675 3097 2044 1457
08-20 53° 61° 6464 4700 3112 2052 1459
08-21 52° 71° 6504 4730 3132 2063 1466
08-22 50° 80° 6547 4763 3155 2079 1476
08-23 54° 81° 6592 4798 3181 2096 1488
08-24 61° 77° 6639 4835 3208 2115 1502
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 65° 79° 6689 4875 3238 2137 1519
08-26 56° 72° 6732 4907 3260 2151 1528
08-27 53° 69° 6770 4936 3279 2162 1534
08-28 44° 73° 6807 4963 3295 2170 1538
08-29 53° 70° 6847 4993 3315 2182 1545
08-30 47° 70° 6884 5019 3332 2191 1548
08-31 48° 76° 6923 5049 3352 2203 1555
09-01 49° 73° 6962 5078 3371 2214 1561
09-02 49° 77° 7003 5109 3392 2227 1569
09-03 49° 77° 7044 5140 3413 2240 1577
09-04 51° 77° 7087 5173 3435 2254 1587
09-05 63° 79° 7136 5212 3464 2275 1603
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 60° 76° 7182 5248 3490 2293 1616
09-07 58° 66° 7222 5278 3510 2305 1623
09-08 45° 70° 7257 5303 3525 2313 1625
09-09 43° 71° 7292 5328 3540 2320 1627
09-10 48° 73° 7330 5356 3559 2330 1632
09-11 47° 75° 7370 5385 3578 2341 1638
09-12 51° 73° 7409 5415 3598 2353 1645
09-13 50° 74° 7449 5445 3617 2365 1652
09-14 57° 76° 7493 5479 3642 2381 1663
09-15 52° 77° 7536 5512 3664 2395 1673
09-16 54° 74° 7577 5543 3686 2409 1681
09-17 49° 71° 7615 5571 3704 2419 1686
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 51° 80° 7659 5605 3727 2434 1697
09-19 55° 77° 7703 5638 3751 2450 1707
09-20 42° 68° 7736 5662 3764 2455 1708
09-21 39° 67° 7767 5683 3775 2458 1708
09-22 40° 71° 7800 5706 3788 2464 1708
09-23 56° 73° 7843 5739 3811 2479 1718
09-24 62° 67° 7886 5772 3834 2493 1728
09-25 62° 70° 7930 5806 3858 2509 1739
09-26 61° 76° 7976 5842 3884 2528 1752
09-27 55° 75° 8019 5875 3908 2543 1762
09-28 60° 82° 8068 5914 3936 2564 1778
09-29 51° 75° 8109 5945 3957 2576 1786
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 51° 76° 8150 5976 3979 2590 1794
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 21° 37° 7 0 0 0 0
02-16 24° 35° 15 0 0 0 0
02-17 23° 32° 20 0 0 0 0
02-18 17° 33° 23 0 0 0 0
02-19 23° 33° 29 0 0 0 0
02-20 13° 37° 32 0 0 0 0
02-21 14° 40° 37 0 0 0 0
02-22 24° 39° 47 0 0 0 0
02-23 33° 46° 64 7 0 0 0
02-24 18° 34° 68 7 0 0 0
02-25 12° 38° 71 7 0 0 0
02-26 28° 56° 91 17 0 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 26° 60° 112 28 1 0 0
02-28 35° 53° 134 40 3 0 0
02-29 23° 34° 140 40 3 0 0
03-01 20° 43° 150 40 3 0 0
03-02 33° 44° 166 46 3 0 0
03-03 42° 61° 195 66 12 1 0
03-04 36° 58° 220 81 17 1 0
03-05 39° 42° 239 89 17 1 0
03-06 40° 49° 261 102 20 1 0
03-07 38° 48° 282 113 21 1 0
03-08 32° 53° 303 123 21 1 0
03-09 32° 40° 317 127 21 1 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 34° 44° 334 135 21 1 0
03-11 28° 42° 347 138 21 1 0
03-12 35° 55° 371 151 24 1 0
03-13 31° 64° 396 166 30 1 0
03-14 33° 66° 423 184 37 1 0
03-15 41° 50° 447 197 41 1 0
03-16 32° 54° 468 208 41 1 0
03-17 38° 52° 491 221 44 1 0
03-18 33° 42° 506 226 44 1 0
03-19 32° 39° 520 230 44 1 0
03-20 30° 47° 536 237 44 1 0
03-21 24° 33° 543 237 44 1 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 21° 35° 549 237 44 1 0
03-23 28° 34° 559 237 44 1 0
03-24 20° 38° 566 237 44 1 0
03-25 26° 43° 578 239 44 1 0
03-26 33° 44° 595 246 44 1 0
03-27 36° 54° 618 258 47 1 0
03-28 42° 49° 641 272 51 1 0
03-29 38° 50° 663 284 53 1 0
03-30 36° 54° 686 297 56 1 0
03-31 38° 53° 710 311 60 1 0
04-01 33° 55° 732 323 62 1 0
04-02 38° 50° 754 335 64 1 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 40° 769 340 64 1 0
04-04 32° 36° 780 341 64 1 0
04-05 29° 40° 793 344 64 1 0
04-06 32° 44° 809 350 64 1 0
04-07 34° 50° 829 359 64 1 0
04-08 31° 62° 853 374 68 1 0
04-09 39° 72° 887 398 82 7 1
04-10 44° 61° 918 418 93 10 1
04-11 46° 56° 947 437 102 11 1
04-12 52° 61° 981 462 117 18 3
04-13 43° 51° 1006 477 122 18 3
04-14 41° 53° 1031 492 127 18 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 40° 66° 1062 513 138 21 3
04-16 39° 63° 1091 532 146 21 3
04-17 38° 62° 1120 550 155 22 3
04-18 43° 46° 1142 563 157 22 3
04-19 42° 61° 1171 582 167 23 3
04-20 42° 59° 1200 601 175 24 3
04-21 33° 47° 1218 609 175 24 3
04-22 34° 55° 1240 621 178 24 3
04-23 30° 65° 1266 637 183 24 3
04-24 36° 60° 1292 653 190 24 3
04-25 29° 56° 1313 664 190 24 3
04-26 30° 60° 1337 677 194 24 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 34° 65° 1364 694 201 24 3
04-28 42° 70° 1398 718 215 29 3
04-29 58° 75° 1442 752 239 46 15
04-30 54° 68° 1481 781 258 56 20
05-01 49° 63° 1515 805 272 63 22
05-02 49° 76° 1555 836 292 75 29
05-03 49° 66° 1590 861 308 82 31
05-04 45° 67° 1625 885 322 88 32
05-05 47° 51° 1651 902 328 88 32
05-06 47° 73° 1689 930 346 98 37
05-07 49° 77° 1730 961 367 111 45
05-08 48° 64° 1764 985 381 117 46
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 52° 67° 1801 1012 398 126 50
05-10 48° 61° 1833 1034 411 131 50
05-11 43° 61° 1863 1054 420 132 50
05-12 46° 60° 1894 1075 431 135 50
05-13 44° 70° 1929 1100 446 142 52
05-14 53° 80° 1973 1134 470 158 64
05-15 59° 66° 2013 1164 491 171 71
05-16 56° 67° 2053 1194 510 182 77
05-17 50° 74° 2093 1224 530 194 84
05-18 55° 63° 2130 1251 547 203 89
05-19 55° 69° 2170 1281 568 216 96
05-20 52° 79° 2214 1315 591 231 107
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 56° 86° 2263 1354 620 252 123
05-22 60° 89° 2316 1397 653 277 142
05-23 63° 81° 2366 1437 683 299 159
05-24 51° 82° 2410 1471 708 316 171
05-25 51° 81° 2454 1505 731 331 182
05-26 61° 84° 2505 1546 762 354 199
05-27 66° 70° 2551 1582 788 372 212
05-28 63° 78° 2599 1620 816 392 228
05-29 58° 74° 2643 1654 840 408 238
05-30 50° 66° 2679 1680 856 416 241
05-31 45° 72° 2716 1706 873 425 245
06-01 49° 79° 2758 1738 895 439 254
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 51° 80° 2801 1772 918 454 264
06-03 61° 83° 2851 1812 948 476 281
06-04 56° 80° 2897 1848 974 494 294
06-05 62° 82° 2947 1888 1004 516 311
06-06 68° 75° 2996 1927 1033 537 328
06-07 61° 80° 3045 1965 1062 558 343
06-08 55° 69° 3085 1996 1082 570 350
06-09 52° 67° 3122 2023 1100 580 355
06-10 53° 69° 3161 2052 1119 591 361
06-11 54° 68° 3201 2081 1138 602 367
06-12 55° 75° 3243 2114 1161 617 377
06-13 52° 81° 3288 2149 1185 633 389
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 77° 3337 2188 1214 654 404
06-15 58° 73° 3380 2221 1237 669 415
06-16 47° 72° 3418 2249 1255 679 419
06-17 56° 80° 3464 2285 1281 697 432
06-18 63° 90° 3519 2329 1316 724 454
06-19 68° 90° 3576 2376 1353 753 478
06-20 66° 89° 3631 2422 1389 781 501
06-21 68° 88° 3687 2468 1424 808 524
06-22 64° 76° 3735 2506 1453 829 539
06-23 63° 83° 3787 2548 1484 852 557
06-24 70° 73° 3836 2587 1514 874 574
06-25 60° 84° 3886 2627 1543 895 590
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 86° 3940 2671 1577 921 611
06-27 61° 80° 3988 2709 1605 941 627
06-28 51° 73° 4028 2739 1625 953 634
06-29 60° 71° 4072 2773 1649 969 644
06-30 67° 84° 4125 2816 1682 994 665
07-01 58° 77° 4171 2852 1708 1012 677
07-02 53° 80° 4215 2886 1732 1028 688
07-03 57° 80° 4262 2922 1759 1047 702
07-04 63° 78° 4310 2961 1787 1067 718
07-05 70° 83° 4365 3006 1822 1094 739
07-06 72° 84° 4421 3052 1858 1122 763
07-07 71° 87° 4478 3099 1895 1151 787
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 87° 4532 3143 1929 1177 808
07-09 70° 86° 4589 3189 1966 1206 831
07-10 73° 87° 4646 3237 2004 1236 856
07-11 74° 85° 4704 3285 2041 1265 881
07-12 67° 84° 4758 3329 2075 1291 901
07-13 73° 85° 4815 3376 2112 1320 925
07-14 66° 86° 4869 3420 2146 1346 946
07-15 68° 87° 4924 3465 2182 1374 969
07-16 70° 87° 4981 3512 2218 1402 993
07-17 68° 85° 5036 3556 2253 1429 1014
07-18 67° 82° 5088 3599 2285 1453 1033
07-19 59° 78° 5134 3635 2312 1472 1047
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 57° 80° 5181 3672 2338 1490 1061
07-21 63° 82° 5231 3712 2369 1513 1078
07-22 61° 81° 5280 3751 2397 1533 1094
07-23 68° 75° 5330 3791 2427 1555 1110
07-24 68° 75° 5379 3830 2457 1577 1127
07-25 66° 79° 5430 3871 2487 1599 1144
07-26 61° 79° 5477 3908 2515 1619 1159
07-27 55° 81° 5524 3945 2541 1637 1172
07-28 58° 79° 5570 3981 2568 1656 1186
07-29 64° 69° 5615 4016 2592 1672 1197
07-30 68° 83° 5668 4059 2626 1698 1218
07-31 71° 81° 5722 4103 2659 1723 1239
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 87° 5778 4149 2695 1751 1262
08-02 66° 87° 5833 4194 2730 1778 1283
08-03 71° 84° 5889 4239 2766 1806 1306
08-04 71° 78° 5941 4282 2798 1830 1325
08-05 66° 84° 5994 4325 2831 1855 1345
08-06 65° 75° 6042 4363 2859 1875 1360
08-07 60° 72° 6086 4397 2883 1891 1371
08-08 58° 73° 6129 4430 2906 1906 1381
08-09 63° 79° 6178 4469 2935 1927 1398
08-10 66° 79° 6229 4510 2966 1950 1415
08-11 58° 78° 6275 4546 2992 1968 1428
08-12 56° 72° 6317 4577 3014 1982 1437
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 56° 77° 6361 4611 3038 1998 1448
08-14 58° 81° 6408 4649 3065 2017 1462
08-15 60° 82° 6457 4688 3094 2038 1478
08-16 61° 77° 6504 4725 3121 2057 1492
08-17 67° 77° 6554 4764 3151 2079 1509
08-18 63° 68° 6597 4798 3175 2095 1520
08-19 66° 79° 6647 4838 3205 2117 1537
08-20 55° 65° 6685 4866 3223 2127 1542
08-21 50° 68° 6723 4894 3240 2136 1546
08-22 52° 70° 6762 4923 3259 2147 1552
08-23 53° 76° 6805 4955 3282 2162 1562
08-24 55° 79° 6849 4990 3307 2179 1574
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 55° 78° 6893 5024 3331 2195 1585
08-26 60° 76° 6939 5060 3357 2213 1598
08-27 59° 80° 6987 5098 3384 2232 1613
08-28 65° 84° 7040 5141 3417 2257 1632
08-29 59° 71° 7083 5174 3440 2272 1642
08-30 54° 74° 7125 5205 3462 2286 1651
08-31 60° 73° 7170 5240 3487 2303 1663
09-01 67° 82° 7222 5283 3519 2327 1682
09-02 56° 72° 7264 5315 3541 2341 1691
09-03 45° 70° 7300 5340 3557 2349 1694
09-04 47° 75° 7338 5369 3575 2359 1700
09-05 50° 75° 7379 5400 3596 2372 1707
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 53° 73° 7420 5431 3617 2385 1715
09-07 55° 69° 7460 5461 3637 2397 1722
09-08 48° 63° 7493 5484 3651 2403 1723
09-09 46° 70° 7530 5510 3667 2411 1726
09-10 52° 72° 7570 5541 3687 2423 1733
09-11 46° 73° 7607 5568 3704 2432 1737
09-12 47° 76° 7647 5597 3724 2444 1744
09-13 53° 80° 7691 5632 3748 2460 1755
09-14 58° 81° 7738 5669 3775 2479 1770
09-15 56° 78° 7783 5704 3800 2496 1781
09-16 50° 78° 7825 5736 3822 2510 1790
09-17 53° 77° 7868 5768 3845 2525 1800
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 56° 77° 7912 5803 3869 2541 1811
09-19 58° 80° 7959 5840 3896 2560 1825
09-20 61° 69° 8002 5873 3919 2575 1835
09-21 57° 64° 8041 5901 3938 2586 1841
09-22 53° 68° 8079 5930 3956 2596 1846
09-23 47° 63° 8112 5953 3969 2601 1846
09-24 47° 64° 8145 5976 3983 2607 1847
09-25 50° 62° 8180 6000 3997 2613 1848
09-26 57° 65° 8218 6029 4015 2623 1854
09-27 59° 74° 8263 6064 4040 2640 1866
09-28 56° 73° 8305 6096 4063 2655 1875
09-29 53° 65° 8342 6123 4080 2664 1879
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 50° 73° 8382 6153 4099 2675 1885

 

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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