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MSU Proxy/Primo Seedhead Timer (GDD 32)
through Sat, Dec. 13. 2025

 
  

Lone Rock, WI

        

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 20° 26° 1 0 0 0 0
02-16 4° 24° 1 0 0 0 0
02-17 -8° 3° 1 0 0 0 0
02-18 -16° 8° 1 0 0 0 0
02-19 -7° 10° 1 0 0 0 0
02-20 -2° 22° 1 0 0 0 0
02-21 -4° 25° 1 0 0 0 0
02-22 11° 29° 1 0 0 0 0
02-23 17° 43° 9 0 0 0 0
02-24 37° 52° 32 13 3 0 0
02-25 33° 50° 52 22 3 0 0
02-26 34° 46° 69 30 3 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 32° 48° 87 38 3 0 0
02-28 31° 53° 107 48 3 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 18° 30° 109 48 3 0 0
03-02 11° 36° 110 48 3 0 0
03-03 32° 51° 130 58 3 0 0
03-04 41° 51° 154 71 7 0 0
03-05 27° 43° 167 75 7 0 0
03-06 22° 40° 176 75 7 0 0
03-07 29° 40° 188 77 7 0 0
03-08 20° 51° 202 81 7 0 0
03-09 29° 61° 225 94 10 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 32° 69° 254 113 18 1 0
03-11 37° 50° 275 124 20 1 0
03-12 29° 56° 296 135 21 1 0
03-13 29° 65° 321 150 26 1 0
03-14 46° 78° 361 180 46 13 7
03-15 33° 58° 385 194 50 13 7
03-16 27° 41° 397 196 50 13 7
03-17 23° 60° 416 205 50 13 7
03-18 35° 64° 444 223 57 13 7
03-19 33° 41° 459 228 57 13 7
03-20 28° 38° 470 229 57 13 7
03-21 32° 57° 492 241 60 13 7
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 27° 45° 506 245 60 13 7
03-23 35° 45° 524 253 60 13 7
03-24 30° 46° 541 259 60 13 7
03-25 27° 50° 557 266 60 13 7
03-26 31° 55° 578 277 60 13 7
03-27 42° 59° 607 296 69 13 7
03-28 46° 82° 649 328 91 28 16
03-29 34° 69° 678 347 101 29 16
03-30 34° 38° 692 351 101 29 16
03-31 30° 47° 709 358 101 29 16
04-01 26° 41° 721 359 101 29 16
04-02 34° 65° 748 377 109 29 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 36° 48° 768 387 109 29 16
04-04 28° 50° 785 394 109 29 16
04-05 35° 49° 805 404 109 29 16
04-06 26° 51° 822 411 109 29 16
04-07 29° 42° 836 415 109 29 16
04-08 18° 44° 846 415 109 29 16
04-09 33° 52° 866 426 109 29 16
04-10 34° 44° 883 433 109 29 16
04-11 30° 53° 903 442 109 29 16
04-12 30° 63° 927 457 114 29 16
04-13 48° 62° 960 480 127 34 16
04-14 48° 56° 990 500 137 36 16
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 38° 55° 1014 514 141 36 16
04-16 27° 58° 1035 525 142 36 16
04-17 39° 60° 1063 542 150 36 16
04-18 51° 66° 1099 569 166 44 19
04-19 41° 56° 1125 585 172 44 19
04-20 34° 50° 1145 595 172 44 19
04-21 42° 54° 1172 611 179 44 19
04-22 37° 70° 1204 633 190 48 19
04-23 44° 72° 1239 659 206 56 22
04-24 53° 61° 1274 684 221 62 24
04-25 45° 54° 1302 701 228 62 24
04-26 36° 60° 1328 717 235 62 24
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 44° 69° 1362 742 249 69 26
04-28 54° 81° 1407 777 274 86 38
04-29 48° 76° 1447 807 294 98 45
04-30 39° 66° 1478 828 305 101 45
05-01 48° 55° 1508 847 314 102 45
05-02 47° 57° 1538 867 324 104 45
05-03 44° 59° 1568 887 334 106 45
05-04 38° 71° 1600 909 347 110 45
05-05 41° 68° 1632 932 359 115 45
05-06 43° 80° 1672 962 379 127 51
05-07 50° 71° 1711 990 398 137 57
05-08 41° 66° 1743 1012 409 141 57
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 33° 73° 1773 1033 420 144 57
05-10 49° 77° 1814 1064 441 157 65
05-11 43° 79° 1853 1093 460 168 71
05-12 46° 83° 1896 1125 482 182 81
05-13 57° 77° 1940 1160 507 199 92
05-14 59° 82° 1989 1198 536 219 108
05-15 62° 89° 2042 1242 569 245 128
05-16 54° 77° 2086 1275 593 260 139
05-17 49° 61° 2119 1298 605 265 139
05-18 48° 66° 2154 1323 620 272 141
05-19 42° 58° 2181 1341 628 272 141
05-20 41° 50° 2205 1354 632 272 141
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 45° 50° 2230 1370 637 272 141
05-22 43° 61° 2260 1390 647 274 141
05-23 40° 65° 2291 1411 658 277 141
05-24 39° 66° 2322 1431 668 279 141
05-25 42° 70° 2356 1455 682 285 142
05-26 42° 69° 2389 1479 696 291 142
05-27 53° 70° 2429 1508 716 303 149
05-28 51° 60° 2462 1532 729 308 149
05-29 49° 68° 2499 1558 746 317 153
05-30 48° 75° 2539 1588 765 328 160
05-31 53° 72° 2579 1618 785 340 167
06-01 42° 75° 2615 1645 802 349 170
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 51° 85° 2661 1681 828 367 183
06-03 61° 80° 2710 1719 857 388 199
06-04 56° 77° 2754 1754 881 404 210
06-05 50° 79° 2797 1786 904 419 220
06-06 60° 77° 2844 1823 930 437 234
06-07 57° 79° 2890 1859 956 455 247
06-08 59° 74° 2934 1894 981 472 258
06-09 56° 64° 2972 1922 999 482 264
06-10 52° 75° 3014 1954 1021 496 272
06-11 62° 86° 3066 1996 1053 520 291
06-12 61° 78° 3113 2033 1080 539 305
06-13 59° 76° 3158 2068 1105 556 317
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 52° 81° 3203 2103 1130 573 329
06-15 64° 74° 3251 2140 1157 592 344
06-16 65° 79° 3301 2180 1188 615 361
06-17 66° 84° 3354 2223 1221 640 381
06-18 65° 73° 3401 2260 1247 658 395
06-19 60° 84° 3450 2300 1277 680 412
06-20 65° 87° 3505 2344 1311 706 433
06-21 76° 93° 3567 2397 1354 741 462
06-22 77° 93° 3630 2449 1397 776 492
06-23 71° 89° 3687 2497 1434 805 517
06-24 69° 83° 3742 2541 1468 831 538
06-25 71° 83° 3797 2586 1504 859 560
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 89° 3854 2633 1540 887 584
06-27 67° 77° 3904 2673 1570 909 601
06-28 62° 85° 3955 2715 1602 933 619
06-29 73° 89° 4014 2763 1641 964 645
06-30 66° 84° 4067 2806 1673 988 665
07-01 61° 84° 4117 2847 1704 1011 682
07-02 63° 86° 4170 2889 1737 1036 702
07-03 65° 89° 4225 2935 1772 1063 724
07-04 71° 90° 4283 2983 1810 1093 750
07-05 72° 87° 4341 3031 1848 1123 774
07-06 71° 82° 4396 3075 1883 1150 796
07-07 62° 82° 4446 3116 1913 1172 813
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 85° 4500 3159 1947 1198 834
07-09 64° 84° 4552 3202 1979 1222 853
07-10 65° 79° 4602 3242 2009 1244 870
07-11 68° 75° 4651 3281 2038 1265 886
07-12 68° 82° 4704 3324 2071 1290 906
07-13 60° 80° 4752 3362 2099 1310 921
07-14 61° 86° 4804 3403 2130 1333 940
07-15 66° 87° 4858 3448 2165 1360 961
07-16 67° 84° 4912 3491 2198 1385 982
07-17 58° 72° 4955 3524 2222 1401 992
07-18 52° 78° 4998 3558 2245 1416 1002
07-19 68° 84° 5052 3602 2279 1442 1023
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 67° 78° 5103 3642 2309 1464 1041
07-21 59° 81° 5151 3680 2337 1484 1056
07-22 67° 86° 5205 3725 2372 1511 1078
07-23 71° 91° 5265 3775 2412 1543 1104
07-24 71° 81° 5319 3819 2446 1569 1125
07-25 70° 83° 5374 3863 2481 1596 1147
07-26 70° 85° 5429 3909 2516 1623 1169
07-27 69° 90° 5487 3956 2554 1653 1194
07-28 72° 89° 5545 4005 2592 1683 1219
07-29 71° 86° 5601 4051 2628 1711 1242
07-30 61° 73° 5646 4086 2653 1728 1254
07-31 60° 75° 5692 4121 2679 1746 1267
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 50° 76° 5733 4153 2700 1759 1275
08-02 52° 78° 5776 4186 2723 1774 1285
08-03 54° 78° 5820 4220 2747 1790 1296
08-04 57° 80° 5867 4256 2773 1808 1310
08-05 57° 83° 5915 4294 2801 1828 1325
08-06 58° 82° 5963 4332 2829 1848 1340
08-07 66° 87° 6017 4377 2864 1875 1361
08-08 70° 90° 6075 4425 2902 1905 1386
08-09 74° 84° 6132 4472 2939 1934 1410
08-10 68° 77° 6182 4512 2969 1956 1427
08-11 69° 82° 6236 4555 3003 1982 1448
08-12 69° 83° 6290 4599 3036 2007 1469
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 62° 80° 6339 4638 3066 2029 1485
08-14 60° 81° 6388 4677 3094 2049 1501
08-15 66° 86° 6442 4721 3129 2076 1522
08-16 69° 80° 6494 4764 3161 2100 1541
08-17 68° 78° 6545 4805 3192 2123 1559
08-18 65° 77° 6594 4844 3221 2144 1575
08-19 67° 82° 6647 4887 3254 2169 1595
08-20 66° 78° 6697 4927 3284 2191 1612
08-21 58° 75° 6742 4962 3309 2208 1624
08-22 59° 79° 6789 4999 3336 2227 1638
08-23 60° 72° 6833 5033 3360 2243 1649
08-24 54° 69° 6873 5062 3379 2254 1656
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 48° 68° 6909 5089 3396 2263 1659
08-26 48° 72° 6947 5116 3414 2273 1664
08-27 50° 72° 6986 5145 3433 2284 1670
08-28 57° 77° 7031 5181 3458 2301 1682
08-29 52° 66° 7068 5208 3475 2310 1686
08-30 58° 73° 7112 5241 3499 2326 1697
08-31 52° 75° 7153 5273 3520 2339 1706
09-01 52° 75° 7195 5304 3542 2353 1714
09-02 55° 76° 7238 5338 3565 2368 1724
09-03 52° 66° 7275 5365 3582 2377 1728
09-04 42° 63° 7306 5385 3593 2380 1728
09-05 52° 60° 7340 5409 3607 2386 1729
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 45° 63° 7372 5431 3618 2389 1729
09-07 40° 65° 7403 5452 3629 2392 1729
09-08 43° 71° 7438 5477 3645 2400 1731
09-09 52° 76° 7480 5509 3667 2414 1740
09-10 58° 72° 7523 5542 3689 2428 1750
09-11 56° 79° 7568 5578 3715 2446 1763
09-12 54° 83° 7615 5614 3742 2465 1776
09-13 65° 82° 7666 5656 3773 2488 1795
09-14 63° 84° 7718 5697 3804 2511 1813
09-15 61° 85° 7769 5739 3836 2535 1831
09-16 60° 87° 7820 5780 3867 2558 1850
09-17 61° 84° 7871 5821 3898 2581 1868
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 62° 82° 7921 5861 3928 2603 1885
09-19 62° 79° 7970 5899 3957 2624 1900
09-20 63° 75° 8017 5936 3984 2643 1914
09-21 60° 76° 8063 5973 4010 2661 1927
09-22 59° 75° 8108 6008 4035 2678 1939
09-23 57° 75° 8152 6042 4059 2694 1951
09-24 54° 67° 8191 6071 4078 2705 1957
09-25 52° 76° 8233 6102 4099 2718 1965
09-26 54° 81° 8279 6138 4125 2736 1978
09-27 56° 83° 8326 6176 4153 2756 1993
09-28 43° 79° 8366 6205 4172 2767 1999
09-29 52° 85° 8412 6242 4199 2786 2013
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 55° 84° 8460 6280 4227 2806 2028
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 27° 39° 11 1 0 0 0
02-16 12° 28° 11 1 0 0 0
02-17 9° 33° 11 1 0 0 0
02-18 24° 43° 23 3 0 0 0
02-19 20° 48° 34 4 0 0 0
02-20 28° 55° 54 14 0 0 0
02-21 35° 57° 78 28 4 0 0
02-22 29° 61° 101 41 7 0 0
02-23 27° 40° 113 43 7 0 0
02-24 12° 36° 115 43 7 0 0
02-25 32° 58° 138 56 10 0 0
02-26 30° 68° 165 73 18 0 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 71° 197 95 29 4 0
02-28 10° 32° 197 95 29 4 0
02-29 12° 48° 205 95 29 4 0
03-01 32° 50° 224 104 29 4 0
03-02 32° 62° 249 119 34 4 0
03-03 43° 75° 286 146 51 13 4
03-04 33° 53° 307 157 52 13 4
03-05 35° 53° 329 169 54 13 4
03-06 24° 54° 346 176 54 13 4
03-07 34° 56° 369 189 57 13 4
03-08 39° 46° 389 200 57 13 4
03-09 28° 40° 401 202 57 13 4
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 22° 47° 414 204 57 13 4
03-11 30° 67° 440 221 64 13 4
03-12 49° 69° 478 248 81 22 9
03-13 33° 67° 506 266 89 22 9
03-14 40° 53° 530 280 94 22 9
03-15 30° 55° 551 291 94 22 9
03-16 39° 49° 572 303 96 22 9
03-17 28° 37° 583 303 96 22 9
03-18 24° 37° 591 303 96 22 9
03-19 30° 57° 612 314 97 22 9
03-20 26° 43° 625 317 97 22 9
03-21 24° 36° 633 317 97 22 9
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 29° 34° 642 317 97 22 9
03-23 20° 38° 649 317 97 22 9
03-24 28° 38° 660 318 97 22 9
03-25 37° 54° 684 332 101 22 9
03-26 29° 52° 702 340 101 22 9
03-27 27° 38° 713 340 101 22 9
03-28 21° 46° 724 342 101 22 9
03-29 24° 53° 741 349 101 22 9
03-30 37° 57° 766 363 106 22 9
03-31 37° 47° 785 373 106 22 9
04-01 35° 45° 803 381 106 22 9
04-02 33° 36° 816 384 106 22 9
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 35° 828 385 106 22 9
04-04 34° 42° 844 392 106 22 9
04-05 33° 51° 864 401 106 22 9
04-06 27° 56° 883 411 106 22 9
04-07 38° 47° 904 421 106 22 9
04-08 43° 61° 934 442 116 25 9
04-09 40° 60° 962 460 125 25 9
04-10 42° 69° 995 483 138 30 9
04-11 41° 62° 1025 503 148 32 9
04-12 46° 60° 1056 524 159 35 9
04-13 35° 72° 1088 545 170 38 9
04-14 56° 81° 1134 582 197 57 22
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 42° 69° 1167 605 210 62 23
04-16 48° 66° 1203 630 225 69 25
04-17 52° 59° 1237 654 239 75 26
04-18 41° 49° 1260 667 242 75 26
04-19 35° 50° 1280 678 243 75 26
04-20 31° 38° 1293 680 243 75 26
04-21 26° 49° 1308 686 243 75 26
04-22 33° 65° 1335 703 250 75 26
04-23 49° 67° 1371 729 266 83 29
04-24 35° 56° 1395 743 270 83 29
04-25 33° 61° 1421 758 275 83 29
04-26 42° 59° 1449 777 284 84 29
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 54° 80° 1494 812 309 101 41
04-28 48° 64° 1528 836 323 107 42
04-29 47° 62° 1561 858 335 111 42
04-30 45° 72° 1597 885 352 120 46
05-01 54° 70° 1637 915 372 132 53
05-02 52° 68° 1675 943 389 142 57
05-03 45° 73° 1712 970 407 151 62
05-04 45° 69° 1748 995 422 158 64
05-05 39° 68° 1779 1017 434 162 64
05-06 43° 74° 1816 1044 450 171 68
05-07 55° 72° 1857 1075 472 184 76
05-08 46° 77° 1897 1105 491 196 83
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 53° 65° 1934 1132 508 205 87
05-10 48° 69° 1971 1158 525 213 90
05-11 46° 70° 2007 1184 541 221 93
05-12 47° 82° 2049 1217 564 236 103
05-13 60° 71° 2093 1250 587 251 113
05-14 52° 67° 2130 1278 605 261 118
05-15 44° 73° 2167 1304 621 269 121
05-16 55° 76° 2210 1338 645 285 132
05-17 48° 80° 2252 1370 666 299 141
05-18 54° 87° 2300 1408 695 319 156
05-19 55° 77° 2344 1442 718 335 167
05-20 59° 73° 2388 1476 742 351 178
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 60° 78° 2435 1512 769 369 191
05-22 56° 71° 2477 1544 791 383 200
05-23 51° 77° 2518 1576 813 397 209
05-24 56° 65° 2557 1605 832 408 215
05-25 45° 74° 2594 1632 849 417 219
05-26 54° 61° 2630 1658 865 425 222
05-27 55° 69° 2670 1688 885 437 229
05-28 51° 62° 2705 1712 899 443 230
05-29 46° 70° 2741 1739 915 452 234
05-30 47° 72° 2779 1767 933 462 239
05-31 50° 78° 2821 1799 956 476 248
06-01 59° 64° 2861 1828 975 487 254
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 57° 75° 2905 1862 999 503 265
06-03 63° 77° 2953 1900 1027 523 280
06-04 65° 80° 3003 1941 1058 546 298
06-05 63° 78° 3052 1980 1087 567 314
06-06 57° 70° 3094 2011 1108 580 322
06-07 56° 74° 3137 2044 1131 595 332
06-08 55° 71° 3177 2075 1152 608 340
06-09 50° 75° 3218 2105 1172 620 347
06-10 49° 72° 3256 2134 1191 631 353
06-11 48° 76° 3296 2164 1211 643 360
06-12 57° 86° 3345 2203 1240 664 376
06-13 64° 81° 3396 2244 1270 687 394
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 57° 78° 3442 2279 1296 704 406
06-15 58° 77° 3488 2315 1322 722 419
06-16 66° 87° 3542 2360 1357 749 441
06-17 74° 89° 3602 2409 1396 780 467
06-18 75° 89° 3661 2459 1436 812 494
06-19 68° 82° 3714 2502 1469 837 514
06-20 64° 71° 3760 2538 1495 855 527
06-21 65° 84° 3813 2581 1527 880 547
06-22 70° 81° 3866 2624 1561 905 567
06-23 63° 78° 3915 2662 1589 925 582
06-24 61° 84° 3965 2703 1620 948 600
06-25 73° 86° 4023 2751 1657 978 625
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 67° 82° 4076 2793 1690 1002 644
06-27 54° 76° 4119 2827 1713 1018 655
06-28 57° 71° 4161 2859 1736 1032 664
06-29 65° 82° 4213 2900 1767 1055 682
06-30 52° 72° 4252 2930 1787 1067 689
07-01 51° 73° 4293 2960 1807 1079 696
07-02 60° 68° 4334 2992 1829 1093 705
07-03 65° 84° 4387 3035 1862 1118 725
07-04 65° 77° 4436 3074 1891 1139 741
07-05 63° 72° 4482 3109 1916 1156 753
07-06 60° 78° 4529 3147 1944 1176 768
07-07 62° 80° 4578 3186 1972 1197 784
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 66° 81° 4629 3227 2004 1220 802
07-09 63° 81° 4680 3268 2034 1243 820
07-10 66° 83° 4732 3310 2067 1267 839
07-11 65° 82° 4784 3351 2098 1290 857
07-12 63° 84° 4835 3393 2130 1314 876
07-13 64° 88° 4889 3437 2164 1340 897
07-14 67° 85° 4943 3481 2198 1366 918
07-15 67° 87° 4998 3526 2233 1393 940
07-16 69° 83° 5052 3570 2267 1419 961
07-17 60° 75° 5097 3605 2292 1436 973
07-18 51° 75° 5139 3636 2313 1449 981
07-19 55° 78° 5183 3671 2337 1466 993
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 58° 80° 5230 3707 2364 1484 1006
07-21 63° 81° 5279 3747 2394 1506 1023
07-22 63° 81° 5330 3787 2424 1528 1040
07-23 67° 78° 5380 3828 2454 1551 1058
07-24 64° 76° 5428 3866 2482 1571 1073
07-25 59° 79° 5475 3903 2509 1590 1087
07-26 57° 82° 5522 3940 2537 1609 1101
07-27 61° 83° 5573 3980 2567 1631 1118
07-28 65° 82° 5624 4022 2599 1655 1137
07-29 69° 82° 5678 4065 2632 1680 1157
07-30 65° 87° 5732 4110 2666 1707 1179
07-31 66° 90° 5788 4156 2703 1735 1202
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 71° 85° 5844 4202 2739 1763 1225
08-02 67° 88° 5899 4247 2774 1790 1247
08-03 68° 86° 5955 4292 2809 1817 1269
08-04 68° 89° 6011 4339 2846 1846 1293
08-05 73° 78° 6065 4382 2879 1871 1313
08-06 58° 75° 6109 4417 2904 1888 1325
08-07 53° 77° 6152 4450 2927 1903 1335
08-08 60° 77° 6199 4486 2953 1921 1348
08-09 51° 69° 6236 4514 2971 1931 1353
08-10 50° 72° 6276 4543 2990 1942 1359
08-11 51° 76° 6317 4575 3012 1956 1368
08-12 53° 80° 6362 4610 3036 1973 1380
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 57° 82° 6409 4647 3064 1992 1394
08-14 60° 83° 6459 4686 3093 2013 1410
08-15 66° 74° 6507 4725 3122 2034 1426
08-16 68° 82° 6560 4768 3155 2059 1446
08-17 68° 76° 6610 4808 3185 2081 1463
08-18 64° 80° 6661 4848 3215 2103 1480
08-19 58° 77° 6706 4884 3241 2121 1493
08-20 56° 72° 6748 4916 3263 2135 1502
08-21 51° 75° 6789 4947 3284 2148 1510
08-22 49° 76° 6830 4978 3305 2161 1518
08-23 54° 79° 6875 5012 3329 2177 1529
08-24 57° 87° 6925 5053 3359 2200 1547
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 69° 91° 6983 5101 3398 2230 1572
08-26 74° 94° 7046 5153 3440 2264 1601
08-27 73° 90° 7106 5203 3480 2296 1628
08-28 67° 85° 7159 5247 3514 2322 1649
08-29 67° 83° 7213 5290 3547 2347 1669
08-30 61° 79° 7261 5328 3575 2367 1684
08-31 54° 83° 7307 5365 3602 2386 1698
09-01 56° 74° 7350 5398 3625 2401 1708
09-02 47° 75° 7389 5427 3644 2412 1714
09-03 50° 77° 7431 5458 3665 2425 1722
09-04 49° 80° 7473 5491 3688 2440 1732
09-05 53° 76° 7516 5523 3710 2454 1741
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 50° 65° 7551 5549 3726 2462 1744
09-07 39° 66° 7582 5569 3736 2464 1744
09-08 42° 74° 7618 5596 3752 2473 1747
09-09 52° 79° 7661 5629 3776 2488 1758
09-10 52° 79° 7705 5663 3800 2504 1768
09-11 57° 85° 7754 5702 3829 2525 1784
09-12 55° 86° 7802 5740 3857 2545 1800
09-13 56° 84° 7850 5778 3885 2565 1814
09-14 62° 85° 7902 5820 3917 2589 1833
09-15 63° 90° 7957 5864 3951 2615 1855
09-16 57° 86° 8006 5904 3981 2637 1871
09-17 56° 87° 8056 5943 4010 2658 1888
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 52° 85° 8102 5980 4037 2677 1901
09-19 57° 85° 8151 6019 4065 2698 1917
09-20 62° 83° 8202 6059 4096 2720 1935
09-21 57° 82° 8249 6097 4124 2740 1949
09-22 52° 66° 8286 6124 4141 2749 1954
09-23 45° 69° 8321 6149 4156 2756 1955
09-24 50° 71° 8359 6177 4174 2766 1960
09-25 48° 75° 8399 6206 4193 2777 1967
09-26 52° 77° 8441 6239 4216 2792 1976
09-27 52° 78° 8484 6272 4239 2807 1986
09-28 54° 81° 8530 6307 4264 2824 1999
09-29 52° 80° 8573 6341 4288 2840 2009
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 53° 79° 8618 6375 4312 2856 2021

 

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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