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MSU Proxy/Primo Seedhead Timer (GDD 32)
forecast for Tue, Dec. 16. 2025

 
  

Chicago, IL

        

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 25° 33° 8 0 0 0 0
02-16 11° 30° 8 0 0 0 0
02-17 -0° 10° 8 0 0 0 0
02-18 -5° 14° 8 0 0 0 0
02-19 3° 17° 8 0 0 0 0
02-20 4° 25° 8 0 0 0 0
02-21 10° 30° 8 0 0 0 0
02-22 15° 35° 11 0 0 0 0
02-23 25° 44° 23 3 0 0 0
02-24 38° 54° 48 17 4 0 0
02-25 37° 54° 71 30 8 0 0
02-26 35° 46° 90 39 8 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 48° 109 48 8 0 0
02-28 33° 57° 132 61 11 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 23° 37° 140 61 11 0 0
03-02 18° 36° 145 61 11 0 0
03-03 30° 47° 162 68 11 0 0
03-04 42° 47° 184 80 13 0 0
03-05 29° 50° 202 87 13 0 0
03-06 26° 40° 213 89 13 0 0
03-07 33° 39° 227 93 13 0 0
03-08 29° 49° 244 100 13 0 0
03-09 33° 58° 268 113 17 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 38° 68° 299 135 28 3 0
03-11 36° 59° 324 150 33 3 0
03-12 35° 46° 343 159 33 3 0
03-13 33° 55° 365 170 35 3 0
03-14 42° 77° 402 198 52 13 5
03-15 46° 68° 437 223 68 20 7
03-16 30° 44° 453 229 68 20 7
03-17 26° 53° 470 236 68 20 7
03-18 45° 71° 506 262 84 28 10
03-19 38° 44° 525 271 84 28 10
03-20 31° 43° 540 276 84 28 10
03-21 29° 59° 562 288 86 28 10
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 52° 582 298 86 28 10
03-23 33° 49° 601 307 86 28 10
03-24 34° 49° 620 316 86 28 10
03-25 30° 47° 637 323 86 28 10
03-26 31° 49° 655 331 86 28 10
03-27 39° 55° 680 346 91 28 10
03-28 47° 77° 720 376 111 40 17
03-29 44° 69° 755 401 126 47 19
03-30 42° 74° 791 427 142 55 22
03-31 35° 44° 809 434 142 55 22
04-01 31° 43° 824 440 142 55 22
04-02 39° 67° 855 461 153 58 22
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 62° 885 481 163 60 22
04-04 37° 46° 905 491 163 60 22
04-05 40° 51° 929 505 167 60 22
04-06 35° 45° 947 512 167 60 22
04-07 31° 44° 962 518 167 60 22
04-08 28° 41° 974 520 167 60 22
04-09 33° 41° 989 525 167 60 22
04-10 37° 41° 1006 532 167 60 22
04-11 34° 49° 1026 542 167 60 22
04-12 34° 58° 1050 556 172 60 22
04-13 49° 63° 1084 579 185 66 22
04-14 53° 64° 1120 606 201 74 26
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 54° 1145 620 206 74 26
04-16 33° 46° 1162 628 206 74 26
04-17 37° 64° 1191 647 215 75 26
04-18 55° 76° 1234 680 238 90 36
04-19 41° 68° 1267 702 250 95 36
04-20 44° 55° 1294 720 258 95 36
04-21 48° 59° 1326 742 270 98 36
04-22 40° 72° 1360 766 284 104 37
04-23 53° 76° 1403 798 306 119 47
04-24 48° 69° 1439 825 323 128 51
04-25 45° 55° 1467 843 331 128 51
04-26 41° 50° 1491 856 334 128 51
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 35° 67° 1520 875 343 129 51
04-28 50° 83° 1564 910 368 145 62
04-29 50° 75° 1605 941 389 158 70
04-30 42° 57° 1633 958 396 158 70
05-01 50° 68° 1669 985 413 167 73
05-02 43° 58° 1698 1003 421 167 73
05-03 43° 49° 1722 1018 426 167 73
05-04 44° 55° 1749 1035 433 167 73
05-05 46° 56° 1778 1054 442 168 73
05-06 44° 74° 1815 1081 459 177 78
05-07 47° 67° 1851 1107 475 185 80
05-08 44° 54° 1878 1124 482 185 80
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 38° 61° 1905 1141 489 185 80
05-10 45° 72° 1942 1168 506 194 84
05-11 42° 66° 1974 1190 518 197 84
05-12 47° 72° 2012 1217 535 207 88
05-13 57° 74° 2055 1251 559 223 99
05-14 55° 75° 2098 1284 582 238 109
05-15 55° 92° 2150 1325 613 261 128
05-16 61° 86° 2201 1367 645 284 146
05-17 54° 70° 2241 1396 664 296 153
05-18 46° 61° 2272 1418 676 299 153
05-19 43° 52° 2297 1433 681 299 153
05-20 48° 54° 2327 1452 690 301 153
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 48° 52° 2355 1470 698 301 153
05-22 46° 53° 2382 1488 706 301 153
05-23 41° 59° 2410 1506 714 301 153
05-24 43° 60° 2439 1525 723 302 153
05-25 50° 63° 2474 1550 738 309 154
05-26 44° 62° 2505 1571 749 312 154
05-27 50° 65° 2541 1597 765 319 157
05-28 53° 59° 2575 1621 779 325 158
05-29 52° 70° 2614 1650 798 337 164
05-30 52° 73° 2654 1680 818 349 171
05-31 49° 61° 2688 1703 831 354 172
06-01 43° 62° 2718 1724 842 357 172
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 46° 83° 2760 1756 864 371 181
06-03 67° 86° 2815 1801 899 398 202
06-04 55° 73° 2857 1833 921 412 211
06-05 53° 68° 2895 1861 939 422 217
06-06 56° 74° 2938 1894 962 437 227
06-07 54° 73° 2980 1926 984 451 235
06-08 58° 80° 3027 1963 1011 470 249
06-09 55° 71° 3068 1994 1032 483 257
06-10 54° 77° 3112 2028 1056 498 268
06-11 63° 91° 3167 2073 1091 526 290
06-12 62° 78° 3215 2111 1119 546 306
06-13 61° 68° 3257 2143 1141 560 315
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 59° 69° 3299 2175 1163 574 324
06-15 56° 77° 3344 2209 1187 590 335
06-16 59° 83° 3393 2249 1217 611 351
06-17 70° 91° 3451 2297 1255 642 377
06-18 67° 79° 3502 2338 1286 665 395
06-19 65° 81° 3553 2379 1317 688 412
06-20 66° 83° 3605 2421 1349 712 432
06-21 74° 92° 3667 2472 1390 745 460
06-22 77° 93° 3730 2526 1434 781 490
06-23 76° 94° 3793 2579 1477 816 521
06-24 73° 92° 3854 2630 1518 848 548
06-25 69° 80° 3906 2672 1550 873 568
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 72° 91° 3966 2721 1589 904 594
06-27 75° 87° 4024 2770 1628 935 620
06-28 67° 81° 4076 2812 1660 959 639
06-29 69° 89° 4133 2859 1697 988 663
06-30 73° 87° 4191 2907 1735 1018 688
07-01 69° 84° 4246 2952 1770 1044 709
07-02 68° 87° 4302 2997 1805 1072 732
07-03 70° 89° 4359 3045 1843 1102 757
07-04 74° 88° 4418 3094 1882 1132 782
07-05 72° 92° 4478 3144 1922 1165 810
07-06 68° 82° 4531 3187 1955 1189 829
07-07 65° 78° 4580 3226 1984 1211 846
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 83° 4633 3269 2017 1236 865
07-09 69° 81° 4686 3311 2049 1260 885
07-10 65° 80° 4736 3352 2080 1283 903
07-11 68° 88° 4792 3398 2116 1311 926
07-12 70° 81° 4846 3441 2149 1336 946
07-13 66° 81° 4897 3483 2181 1360 965
07-14 62° 86° 4949 3525 2213 1384 984
07-15 68° 89° 5005 3571 2249 1412 1007
07-16 74° 89° 5065 3620 2288 1443 1033
07-17 63° 75° 5112 3658 2316 1462 1047
07-18 60° 78° 5159 3694 2342 1481 1061
07-19 71° 82° 5213 3739 2377 1508 1083
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 66° 74° 5262 3778 2406 1528 1098
07-21 64° 81° 5312 3818 2436 1551 1116
07-22 66° 84° 5366 3861 2469 1576 1136
07-23 71° 93° 5425 3911 2509 1608 1163
07-24 73° 92° 5486 3962 2550 1641 1190
07-25 73° 80° 5540 4006 2584 1667 1212
07-26 72° 82° 5595 4051 2619 1694 1234
07-27 73° 85° 5652 4098 2656 1723 1258
07-28 75° 89° 5713 4149 2697 1755 1285
07-29 70° 93° 5772 4198 2736 1787 1312
07-30 69° 79° 5824 4240 2768 1811 1331
07-31 67° 74° 5872 4278 2796 1831 1346
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 63° 75° 5919 4315 2823 1850 1360
08-02 59° 78° 5966 4352 2850 1868 1373
08-03 60° 78° 6013 4389 2877 1887 1387
08-04 64° 79° 6062 4428 2906 1909 1404
08-05 65° 81° 6113 4469 2937 1932 1421
08-06 66° 85° 6166 4512 2970 1957 1442
08-07 70° 88° 6223 4559 3007 1986 1466
08-08 72° 91° 6283 4608 3046 2017 1492
08-09 73° 93° 6344 4659 3087 2050 1520
08-10 75° 88° 6403 4709 3127 2082 1547
08-11 74° 89° 6463 4758 3166 2113 1573
08-12 72° 84° 6519 4804 3202 2141 1596
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 69° 81° 6572 4848 3236 2166 1616
08-14 65° 80° 6622 4888 3266 2189 1634
08-15 66° 89° 6678 4934 3302 2217 1656
08-16 74° 94° 6740 4986 3344 2250 1685
08-17 71° 78° 6792 5028 3376 2275 1705
08-18 71° 83° 6847 5073 3411 2302 1727
08-19 71° 75° 6899 5114 3442 2325 1745
08-20 68° 73° 6947 5153 3471 2346 1761
08-21 65° 74° 6994 5190 3498 2365 1775
08-22 63° 78° 7043 5229 3527 2386 1790
08-23 66° 82° 7095 5271 3559 2410 1809
08-24 57° 72° 7138 5303 3581 2424 1819
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 54° 70° 7178 5333 3601 2436 1826
08-26 53° 73° 7218 5364 3622 2449 1834
08-27 53° 77° 7261 5397 3645 2464 1844
08-28 61° 73° 7306 5432 3670 2481 1856
08-29 55° 68° 7346 5462 3690 2492 1862
08-30 61° 73° 7391 5496 3714 2509 1874
08-31 54° 74° 7433 5529 3737 2523 1883
09-01 58° 76° 7478 5564 3762 2541 1895
09-02 58° 78° 7524 5600 3788 2558 1908
09-03 58° 71° 7566 5632 3810 2573 1918
09-04 49° 65° 7601 5657 3825 2580 1920
09-05 55° 66° 7640 5686 3844 2590 1925
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 47° 66° 7674 5710 3858 2597 1927
09-07 46° 67° 7709 5735 3873 2604 1929
09-08 48° 71° 7747 5763 3891 2614 1934
09-09 50° 75° 7788 5794 3912 2627 1942
09-10 57° 80° 7835 5830 3938 2645 1955
09-11 62° 75° 7881 5867 3965 2664 1969
09-12 60° 82° 7930 5906 3994 2685 1985
09-13 63° 77° 7978 5944 4022 2705 2000
09-14 64° 80° 8028 5984 4052 2727 2017
09-15 62° 81° 8077 6023 4081 2748 2033
09-16 60° 80° 8126 6062 4110 2769 2048
09-17 59° 80° 8174 6099 4137 2788 2063
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 59° 84° 8224 6139 4167 2810 2080
09-19 64° 87° 8277 6183 4201 2836 2101
09-20 66° 78° 8327 6223 4231 2858 2118
09-21 67° 80° 8379 6264 4262 2881 2136
09-22 66° 80° 8429 6305 4293 2904 2154
09-23 66° 76° 8478 6344 4322 2925 2170
09-24 62° 71° 8523 6379 4347 2942 2181
09-25 59° 72° 8567 6413 4371 2957 2192
09-26 55° 83° 8614 6450 4398 2977 2206
09-27 59° 86° 8665 6491 4429 2999 2224
09-28 62° 76° 8712 6527 4455 3018 2238
09-29 60° 85° 8762 6568 4486 3041 2256
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 80° 8811 6607 4515 3062 2271
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 42° 15 5 0 0 0
02-16 27° 32° 23 5 0 0 0
02-17 13° 28° 23 5 0 0 0
02-18 22° 45° 34 7 0 0 0
02-19 24° 50° 49 12 0 0 0
02-20 29° 56° 70 22 1 0 0
02-21 44° 64° 102 45 13 4 0
02-22 43° 56° 130 62 21 4 0
02-23 27° 49° 146 68 21 4 0
02-24 23° 34° 152 68 21 4 0
02-25 30° 60° 175 81 24 4 0
02-26 38° 69° 207 103 35 8 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 72° 247 134 56 21 8
02-28 21° 56° 264 140 56 21 8
02-29 20° 44° 274 140 56 21 8
03-01 31° 45° 290 147 56 21 8
03-02 35° 57° 314 161 60 21 8
03-03 43° 70° 349 186 75 27 9
03-04 51° 69° 387 214 93 38 15
03-05 39° 50° 410 226 95 38 15
03-06 37° 45° 429 235 95 38 15
03-07 36° 46° 448 244 95 38 15
03-08 41° 44° 468 255 96 38 15
03-09 33° 44° 485 261 96 38 15
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 45° 501 267 96 38 15
03-11 32° 67° 528 284 103 38 15
03-12 46° 70° 564 310 119 45 18
03-13 47° 63° 597 334 132 51 18
03-14 42° 57° 625 351 140 51 18
03-15 37° 47° 645 361 140 51 18
03-16 37° 57° 670 376 145 51 18
03-17 31° 41° 684 380 145 51 18
03-18 26° 35° 692 380 145 51 18
03-19 30° 56° 713 391 146 51 18
03-20 30° 42° 728 395 146 51 18
03-21 25° 38° 737 395 146 51 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 37° 750 398 146 51 18
03-23 30° 37° 761 399 146 51 18
03-24 31° 45° 778 406 146 51 18
03-25 44° 61° 808 426 156 53 18
03-26 34° 54° 830 439 159 53 18
03-27 30° 42° 844 442 159 53 18
03-28 29° 50° 862 450 159 53 18
03-29 32° 48° 880 458 159 53 18
03-30 40° 58° 907 475 166 53 18
03-31 38° 48° 927 486 166 53 18
04-01 41° 46° 949 497 168 53 18
04-02 36° 49° 969 507 168 53 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 34° 38° 983 511 168 53 18
04-04 36° 41° 1000 518 168 53 18
04-05 37° 46° 1019 527 168 53 18
04-06 32° 48° 1037 535 168 53 18
04-07 37° 49° 1058 546 169 53 18
04-08 46° 69° 1093 571 185 60 20
04-09 51° 63° 1128 596 200 67 22
04-10 43° 65° 1160 618 211 71 22
04-11 48° 54° 1189 637 221 72 22
04-12 48° 62° 1222 660 233 77 22
04-13 41° 69° 1255 683 247 82 22
04-14 61° 77° 1302 720 274 101 36
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 47° 68° 1338 746 289 109 39
04-16 50° 67° 1374 772 305 117 42
04-17 59° 66° 1415 803 326 130 50
04-18 47° 54° 1443 821 335 131 50
04-19 41° 56° 1470 838 341 131 50
04-20 34° 45° 1488 846 341 131 50
04-21 32° 47° 1505 853 341 131 50
04-22 39° 66° 1535 874 351 133 50
04-23 56° 63° 1573 901 369 142 54
04-24 35° 49° 1593 911 369 142 54
04-25 32° 54° 1614 922 370 142 54
04-26 42° 57° 1641 939 377 142 54
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 57° 78° 1687 975 403 159 67
04-28 57° 71° 1729 1007 425 174 76
04-29 59° 68° 1770 1038 446 187 84
04-30 47° 70° 1807 1065 463 195 88
05-01 60° 75° 1852 1100 488 213 100
05-02 51° 73° 1892 1130 508 225 107
05-03 49° 64° 1926 1155 522 231 108
05-04 45° 75° 1965 1183 541 241 114
05-05 48° 62° 1998 1206 554 247 114
05-06 46° 65° 2031 1229 567 252 114
05-07 54° 72° 2072 1260 588 265 122
05-08 51° 74° 2113 1291 609 278 130
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 50° 59° 2145 1313 621 282 130
05-10 46° 65° 2179 1337 635 288 131
05-11 50° 64° 2214 1362 650 295 133
05-12 47° 82° 2257 1395 673 310 143
05-13 61° 81° 2306 1434 702 331 159
05-14 50° 61° 2340 1458 716 336 159
05-15 51° 64° 2375 1483 731 344 162
05-16 50° 74° 2415 1513 751 356 169
05-17 59° 77° 2461 1549 777 374 181
05-18 56° 84° 2509 1587 804 393 196
05-19 60° 73° 2553 1621 829 410 208
05-20 57° 80° 2600 1658 855 428 221
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 57° 88° 2650 1698 886 451 239
05-22 63° 79° 2699 1737 915 472 255
05-23 56° 77° 2744 1772 940 489 266
05-24 60° 76° 2790 1808 966 507 280
05-25 57° 71° 2832 1840 988 521 289
05-26 55° 69° 2872 1870 1008 533 296
05-27 58° 71° 2915 1903 1031 547 305
05-28 55° 68° 2954 1933 1050 559 312
05-29 52° 65° 2991 1959 1067 568 316
05-30 45° 67° 3025 1983 1081 574 316
05-31 48° 77° 3065 2014 1101 586 324
06-01 59° 65° 3106 2044 1122 599 331
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 58° 72° 3149 2077 1145 614 341
06-03 54° 84° 3196 2114 1172 633 355
06-04 68° 84° 3250 2158 1206 659 377
06-05 69° 78° 3301 2199 1237 682 395
06-06 63° 77° 3349 2237 1265 702 409
06-07 58° 77° 3395 2273 1290 719 422
06-08 57° 76° 3439 2307 1315 735 433
06-09 54° 79° 3484 2342 1340 752 445
06-10 53° 66° 3521 2369 1357 762 450
06-11 48° 76° 3561 2400 1377 774 457
06-12 64° 89° 3616 2444 1412 801 479
06-13 72° 88° 3674 2492 1450 831 503
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 64° 80° 3724 2532 1480 853 521
06-15 59° 82° 3773 2571 1509 873 536
06-16 68° 93° 3831 2619 1547 904 562
06-17 74° 94° 3894 2672 1589 938 591
06-18 78° 92° 3957 2725 1632 973 621
06-19 76° 92° 4019 2777 1675 1008 650
06-20 64° 79° 4069 2817 1704 1029 667
06-21 64° 92° 4125 2863 1741 1057 690
06-22 68° 91° 4182 2910 1778 1087 715
06-23 69° 79° 4234 2952 1810 1111 734
06-24 64° 82° 4285 2993 1841 1134 751
06-25 71° 83° 4340 3038 1876 1161 774
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 66° 84° 4393 3082 1909 1186 794
06-27 60° 71° 4437 3115 1933 1202 805
06-28 63° 74° 4483 3151 1959 1220 818
06-29 71° 88° 4541 3199 1997 1250 843
06-30 60° 76° 4586 3234 2022 1267 855
07-01 54° 71° 4627 3265 2043 1280 862
07-02 64° 84° 4679 3307 2075 1304 882
07-03 73° 88° 4738 3356 2113 1334 907
07-04 69° 82° 4791 3399 2147 1360 927
07-05 68° 83° 4844 3442 2180 1385 948
07-06 64° 78° 4893 3481 2209 1406 964
07-07 64° 83° 4945 3523 2241 1430 983
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 69° 84° 5000 3568 2275 1456 1004
07-09 70° 79° 5052 3610 2308 1481 1024
07-10 66° 80° 5103 3651 2339 1504 1042
07-11 65° 78° 5152 3690 2368 1525 1058
07-12 65° 82° 5204 3732 2400 1549 1076
07-13 66° 87° 5259 3777 2435 1575 1098
07-14 68° 87° 5314 3822 2470 1603 1120
07-15 68° 88° 5370 3868 2506 1631 1144
07-16 69° 86° 5426 3914 2542 1658 1166
07-17 68° 82° 5478 3957 2574 1683 1186
07-18 62° 73° 5524 3992 2600 1701 1199
07-19 58° 78° 5570 4028 2626 1719 1212
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 62° 79° 5618 4066 2654 1739 1227
07-21 64° 82° 5670 4108 2686 1762 1245
07-22 65° 82° 5721 4149 2717 1786 1263
07-23 66° 85° 5775 4193 2750 1811 1284
07-24 68° 73° 5823 4231 2779 1832 1300
07-25 63° 76° 5871 4269 2807 1852 1314
07-26 58° 79° 5917 4306 2833 1870 1328
07-27 63° 84° 5969 4347 2865 1894 1347
07-28 69° 81° 6022 4390 2898 1919 1367
07-29 72° 80° 6076 4434 2932 1945 1388
07-30 69° 88° 6133 4481 2969 1974 1411
07-31 71° 92° 6192 4530 3008 2005 1438
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 74° 85° 6250 4578 3046 2034 1462
08-02 70° 83° 6304 4622 3080 2061 1484
08-03 70° 87° 6361 4669 3117 2090 1507
08-04 70° 90° 6419 4717 3155 2120 1532
08-05 74° 85° 6476 4764 3192 2149 1557
08-06 67° 74° 6525 4803 3220 2169 1572
08-07 65° 77° 6574 4842 3250 2190 1588
08-08 62° 83° 6624 4882 3280 2213 1606
08-09 60° 74° 6669 4918 3305 2230 1618
08-10 55° 76° 6713 4951 3329 2245 1628
08-11 56° 79° 6759 4987 3354 2263 1641
08-12 58° 81° 6806 5024 3382 2283 1656
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 62° 82° 6856 5064 3412 2305 1673
08-14 64° 83° 6907 5106 3443 2328 1691
08-15 68° 73° 6956 5144 3472 2349 1707
08-16 68° 84° 7010 5188 3506 2375 1727
08-17 68° 80° 7062 5230 3538 2399 1746
08-18 67° 76° 7111 5270 3567 2420 1763
08-19 63° 74° 7158 5306 3594 2439 1777
08-20 58° 70° 7201 5339 3617 2453 1786
08-21 54° 73° 7242 5370 3638 2467 1795
08-22 53° 78° 7286 5404 3662 2483 1806
08-23 56° 81° 7333 5441 3689 2502 1820
08-24 61° 87° 7385 5483 3721 2526 1839
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 71° 91° 7444 5532 3760 2557 1865
08-26 78° 94° 7508 5586 3804 2593 1896
08-27 74° 95° 7571 5639 3847 2628 1926
08-28 72° 82° 7626 5684 3882 2655 1948
08-29 70° 83° 7681 5729 3917 2682 1969
08-30 72° 83° 7736 5774 3952 2709 1992
08-31 61° 83° 7786 5814 3982 2731 2009
09-01 63° 74° 7833 5851 4009 2750 2022
09-02 59° 73° 7877 5885 4033 2766 2034
09-03 55° 76° 7921 5919 4056 2781 2044
09-04 56° 81° 7967 5955 4083 2800 2058
09-05 63° 87° 8020 5998 4116 2825 2078
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 58° 73° 8064 6032 4140 2841 2088
09-07 48° 65° 8098 6056 4154 2847 2090
09-08 47° 73° 8136 6084 4172 2857 2095
09-09 55° 81° 8182 6120 4198 2875 2108
09-10 55° 82° 8229 6157 4225 2894 2121
09-11 58° 85° 8278 6196 4254 2915 2138
09-12 61° 84° 8328 6236 4284 2937 2155
09-13 65° 81° 8379 6277 4315 2960 2173
09-14 65° 83° 8432 6320 4347 2984 2192
09-15 65° 86° 8485 6363 4381 3010 2213
09-16 62° 87° 8538 6406 4414 3035 2232
09-17 60° 81° 8587 6445 4443 3056 2248
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 61° 84° 8637 6486 4473 3078 2266
09-19 60° 87° 8689 6527 4505 3102 2284
09-20 70° 88° 8746 6574 4542 3131 2308
09-21 62° 89° 8799 6617 4575 3156 2329
09-22 65° 75° 8847 6655 4603 3176 2344
09-23 61° 66° 8888 6687 4624 3189 2352
09-24 62° 66° 8931 6719 4647 3203 2361
09-25 57° 73° 8974 6752 4670 3219 2372
09-26 55° 74° 9016 6784 4692 3233 2381
09-27 63° 71° 9061 6819 4717 3250 2393
09-28 67° 70° 9108 6856 4743 3268 2406
09-29 67° 71° 9155 6893 4771 3287 2420
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 62° 76° 9202 6930 4798 3307 2435

 

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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