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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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Sat, Jul. 24. 2021

 
  

Apple Valley, MN

       

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2021 & 2020

2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 -19° -1° 0 0 0 0 0
02-16 -12° 0 0 0 0 0
02-17 -4° 10° 0 0 0 0 0
02-18 15° 0 0 0 0 0
02-19 17° 0 0 0 0 0
02-20 22° 0 0 0 0 0
02-21 19° 27° 1 0 0 0 0
02-22 24° 40° 11 0 0 0 0
02-23 30° 39° 24 3 0 0 0
02-24 29° 38° 35 4 0 0 0
02-25 24° 35° 43 4 0 0 0
02-26 24° 39° 52 4 0 0 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 28° 46° 67 9 0 0 0
02-28 23° 40° 76 9 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 14° 24° 76 9 0 0 0
03-02 19° 46° 87 10 0 0 0
03-03 32° 50° 106 19 0 0 0
03-04 33° 44° 122 25 0 0 0
03-05 28° 41° 135 28 0 0 0
03-06 21° 41° 144 28 0 0 0
03-07 33° 57° 168 41 3 0 0
03-08 33° 55° 190 54 6 0 0
03-09 42° 62° 220 74 16 2 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 40° 51° 244 88 20 2 0
03-11 33° 46° 262 96 20 2 0
03-12 28° 44° 276 99 20 2 0
03-13 31° 57° 297 111 22 2 0
03-14 36° 47° 317 121 22 2 0
03-15 28° 40° 329 123 22 2 0
03-16 28° 34° 338 123 22 2 0
03-17 31° 41° 352 127 22 2 0
03-18 32° 51° 372 137 22 2 0
03-19 26° 48° 387 142 22 2 0
03-20 35° 58° 411 156 26 2 0
03-21 43° 62° 442 176 36 5 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 35° 58° 467 191 41 5 0
03-23 43° 56° 494 209 49 5 0
03-24 40° 46° 515 219 50 5 0
03-25 31° 51° 534 228 50 5 0
03-26 29° 48° 550 235 50 5 0
03-27 36° 46° 569 244 50 5 0
03-28 32° 44° 585 249 50 5 0
03-29 36° 72° 617 271 62 9 0
03-30 31° 60° 641 285 66 9 0
03-31 25° 33° 647 285 66 9 0
04-01 18° 44° 656 285 66 9 0
04-02 33° 62° 681 300 71 9 0
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 41° 70° 715 324 84 14 0
04-04 44° 77° 754 353 103 25 6
04-05 49° 84° 798 387 127 41 18
04-06 52° 72° 838 417 147 53 25
04-07 55° 73° 880 449 169 67 34
04-08 50° 65° 915 474 185 74 36
04-09 44° 51° 941 490 191 74 36
04-10 42° 47° 964 503 193 74 36
04-11 42° 54° 990 519 200 74 36
04-12 40° 50° 1013 532 202 74 36
04-13 31° 38° 1026 535 202 74 36
04-14 29° 45° 1041 540 202 74 36
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 38° 49° 1063 552 204 74 36
04-16 37° 59° 1089 568 210 74 36
04-17 35° 59° 1114 583 215 74 36
04-18 35° 63° 1141 600 222 74 36
04-19 33° 41° 1156 605 222 74 36
04-20 30° 42° 1170 609 222 74 36
04-21 26° 43° 1182 611 222 74 36
04-22 36° 63° 1209 628 229 74 36
04-23 44° 51° 1235 644 235 74 36
04-24 37° 50° 1256 655 236 74 36
04-25 30° 44° 1272 661 236 74 36
04-26 41° 55° 1297 676 242 74 36
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 41° 56° 1324 693 248 74 36
04-28 39° 62° 1352 711 257 75 36
04-29 43° 67° 1385 734 269 80 36
04-30 42° 61° 1414 753 279 81 36
05-01 54° 84° 1461 790 306 100 50
05-02 55° 71° 1502 821 327 113 58
05-03 51° 67° 1539 848 344 122 62
05-04 41° 58° 1567 866 351 122 62
05-05 37° 55° 1591 880 355 122 62
05-06 38° 61° 1618 897 363 122 62
05-07 39° 56° 1644 913 368 122 62
05-08 38° 56° 1669 928 373 122 62
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 39° 62° 1697 946 382 122 62
05-10 42° 53° 1723 962 387 122 62
05-11 33° 61° 1748 977 392 122 62
05-12 39° 67° 1779 998 403 125 62
05-13 45° 70° 1814 1023 419 132 64
05-14 54° 65° 1852 1051 436 142 69
05-15 49° 74° 1891 1080 456 153 75
05-16 51° 74° 1932 1111 476 166 83
05-17 48° 78° 1973 1142 497 179 91
05-18 56° 69° 2014 1173 518 192 99
05-19 61° 73° 2059 1208 544 209 111
05-20 65° 74° 2107 1246 571 229 126
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 63° 80° 2157 1286 601 251 143
05-22 67° 82° 2209 1328 634 275 162
05-23 69° 78° 2260 1369 665 299 180
05-24 67° 84° 2314 1413 699 324 201
05-25 65° 85° 2367 1456 732 349 221
05-26 56° 70° 2408 1487 752 362 229
05-27 42° 57° 2436 1505 760 362 229
05-28 39° 59° 2462 1521 767 362 229
05-29 40° 64° 2493 1542 777 364 229
05-30 53° 60° 2527 1566 792 371 230
05-31 51° 77° 2570 1599 814 385 240
06-01 51° 77° 2612 1631 836 400 249
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 58° 83° 2660 1669 865 420 265
06-03 67° 90° 2717 1716 901 448 288
06-04 72° 95° 2778 1767 942 482 316
06-05 76° 98° 2843 1822 987 518 348
06-06 74° 91° 2903 1872 1028 551 375
06-07 72° 94° 2964 1923 1069 584 403
06-08 74° 94° 3026 1975 1111 618 432
06-09 72° 94° 3087 2026 1152 651 460
06-10 75° 97° 3151 2080 1195 687 491
06-11 76° 88° 3211 2130 1235 719 518
06-12 65° 85° 3264 2173 1268 744 538
06-13 59° 95° 3319 2218 1303 770 560
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 61° 85° 3370 2259 1334 793 578
06-15 62° 81° 3419 2298 1364 815 595
06-16 61° 88° 3472 2341 1397 840 614
06-17 73° 88° 3531 2390 1435 871 640
06-18 62° 89° 3585 2434 1469 896 661
06-19 63° 79° 3634 2473 1498 918 677
06-20 61° 75° 3680 2509 1524 936 690
06-21 53° 65° 3717 2536 1541 945 694
06-22 49° 76° 3758 2567 1562 957 702
06-23 58° 88° 3809 2608 1593 980 720
06-24 75° 88° 3868 2657 1632 1012 746
06-25 66° 85° 3921 2700 1666 1037 767
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 69° 74° 3971 2740 1695 1059 783
06-27 65° 79° 4021 2780 1726 1081 800
06-28 64° 81° 4072 2821 1756 1103 818
06-29 68° 82° 4124 2863 1789 1128 838
06-30 65° 85° 4177 2906 1822 1153 858
07-01 66° 86° 4232 2951 1856 1179 879
07-02 62° 84° 4283 2992 1887 1202 897
07-03 64° 85° 4335 3034 1920 1227 916
07-04 71° 92° 4395 3084 1959 1259 943
07-05 73° 94° 4456 3135 2001 1292 971
07-06 66° 81° 4507 3176 2032 1315 990
07-07 56° 64° 4545 3204 2050 1325 994
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 54° 70° 4586 3235 2070 1337 1002
07-09 62° 75° 4632 3271 2096 1356 1015
07-10 63° 78° 4680 3309 2125 1376 1031
07-11 59° 83° 4730 3349 2154 1397 1047
07-12 57° 80° 4776 3385 2181 1416 1061
07-13 61° 84° 4827 3426 2211 1438 1078
07-14 66° 74° 4875 3464 2239 1458 1093
07-15 61° 80° 4923 3502 2268 1479 1108
07-16 60° 83° 4972 3541 2297 1500 1125
07-17 61° 83° 5023 3582 2327 1522 1142
07-18 62° 84° 5074 3623 2358 1546 1160
07-19 63° 86° 5127 3666 2391 1570 1180
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 67° 87° 5182 3711 2426 1598 1202
07-21 66° 81° 5233 3752 2458 1621 1221
07-22 71° 84° 5289 3798 2493 1648 1243
07-23 72° 91° 5349 3848 2533 1680 1270
07-24 73° 90° 5408 3897 2572 1712 1296
07-25 63° 90° 5462 3941 2607 1738 1318
07-26 65° 92° 5519 3988 2643 1767 1341
07-27 69° 95° 5579 4038 2683 1799 1368
07-28 72° 98° 5642 4091 2726 1834 1398
07-29 70° 89° 5699 4138 2764 1863 1422
07-30 65° 88° 5754 4183 2798 1889 1444
07-31 66° 88° 5809 4228 2833 1916 1466
2021Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 14° 35° 2 0 0 0 0
02-16 11° 23° 2 0 0 0 0
02-17 23° 36° 10 0 0 0 0
02-18 26° 10 0 0 0 0
02-19 -2° 11° 10 0 0 0 0
02-20 -14° 11° 10 0 0 0 0
02-21 35° 10 0 0 0 0
02-22 17° 39° 16 0 0 0 0
02-23 26° 41° 27 2 0 0 0
02-24 22° 41° 37 2 0 0 0
02-25 26° 36° 46 2 0 0 0
02-26 14° 27° 46 2 0 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 23° 46 2 0 0 0
02-28 12° 25° 46 2 0 0 0
02-29 37° 47 2 0 0 0
03-01 34° 43° 64 8 0 0 0
03-02 27° 35° 73 8 0 0 0
03-03 29° 39° 85 11 0 0 0
03-04 17° 37° 90 11 0 0 0
03-05 33° 41° 105 16 0 0 0
03-06 20° 34° 110 16 0 0 0
03-07 28° 46° 125 21 0 0 0
03-08 43° 55° 152 38 7 0 0
03-09 32° 48° 170 46 7 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 22° 38° 178 46 7 0 0
03-11 31° 40° 192 49 7 0 0
03-12 34° 42° 208 56 7 0 0
03-13 27° 37° 217 56 7 0 0
03-14 23° 33° 224 56 7 0 0
03-15 22° 37° 231 56 7 0 0
03-16 31° 37° 243 58 7 0 0
03-17 29° 42° 257 61 7 0 0
03-18 37° 44° 275 69 7 0 0
03-19 36° 41° 292 76 7 0 0
03-20 21° 35° 298 76 7 0 0
03-21 20° 34° 303 76 7 0 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 31° 42° 317 80 7 0 0
03-23 33° 43° 333 86 7 0 0
03-24 37° 48° 354 97 7 0 0
03-25 39° 47° 375 107 8 0 0
03-26 31° 50° 393 116 8 0 0
03-27 37° 57° 418 131 13 0 0
03-28 41° 50° 441 144 17 0 0
03-29 34° 48° 460 153 17 0 0
03-30 31° 58° 483 166 19 0 0
03-31 34° 55° 505 178 22 0 0
04-01 35° 54° 528 191 24 0 0
04-02 46° 61° 560 212 36 4 0
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 26° 52° 577 219 36 4 0
04-04 20° 44° 586 219 36 4 0
04-05 26° 56° 605 228 36 4 0
04-06 43° 58° 634 247 44 4 0
04-07 50° 69° 671 275 62 14 5
04-08 41° 54° 697 290 68 14 5
04-09 32° 39° 711 294 68 14 5
04-10 29° 48° 727 300 68 14 5
04-11 33° 60° 751 314 72 14 5
04-12 28° 46° 766 319 72 14 5
04-13 22° 33° 771 319 72 14 5
04-14 21° 29° 775 319 72 14 5
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 18° 33° 778 319 72 14 5
04-16 25° 43° 791 321 72 14 5
04-17 30° 47° 807 328 72 14 5
04-18 37° 65° 836 347 81 14 5
04-19 36° 49° 856 357 81 14 5
04-20 36° 59° 882 372 87 14 5
04-21 30° 47° 899 379 87 14 5
04-22 43° 68° 932 403 100 20 5
04-23 37° 60° 959 420 107 20 5
04-24 43° 65° 992 442 119 25 5
04-25 43° 68° 1025 466 133 30 6
04-26 45° 66° 1059 489 146 36 6
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 53° 73° 1100 520 168 49 15
04-28 46° 57° 1129 540 177 50 15
04-29 43° 61° 1159 560 187 52 15
04-30 43° 67° 1192 583 200 57 15
05-01 51° 79° 1235 616 223 72 25
05-02 55° 74° 1278 648 246 87 34
05-03 47° 68° 1313 673 261 94 36
05-04 40° 59° 1341 691 268 94 36
05-05 47° 58° 1371 712 279 96 36
05-06 47° 64° 1404 735 292 102 37
05-07 44° 60° 1434 755 302 103 37
05-08 35° 49° 1454 765 302 103 37
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 32° 62° 1479 780 307 103 37
05-10 39° 47° 1500 790 308 103 37
05-11 40° 54° 1525 806 313 103 37
05-12 33° 57° 1548 818 316 103 37
05-13 47° 62° 1580 841 328 108 37
05-14 52° 71° 1620 870 347 119 43
05-15 46° 70° 1656 896 364 127 46
05-16 52° 64° 1691 922 379 135 49
05-17 48° 53° 1720 941 388 136 49
05-18 50° 64° 1755 966 403 143 51
05-19 54° 69° 1795 995 423 154 58
05-20 59° 76° 1841 1031 448 172 70
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 57° 65° 1880 1060 468 183 76
05-22 58° 65° 1919 1089 487 194 83
05-23 60° 70° 1962 1122 509 209 92
05-24 60° 76° 2008 1158 535 227 105
05-25 65° 77° 2057 1197 564 248 121
05-26 66° 79° 2107 1237 595 270 138
05-27 65° 75° 2154 1275 622 290 153
05-28 62° 76° 2201 1312 649 309 167
05-29 54° 64° 2238 1339 666 318 171
05-30 50° 67° 2275 1366 683 327 175
05-31 47° 77° 2315 1396 703 339 182
06-01 64° 90° 2370 1441 738 366 204
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 67° 91° 2427 1488 775 395 228
06-03 63° 83° 2478 1529 806 418 246
06-04 60° 86° 2529 1570 837 441 264
06-05 61° 81° 2578 1609 866 462 280
06-06 59° 77° 2624 1645 892 480 293
06-07 63° 88° 2678 1688 926 505 314
06-08 75° 95° 2741 1741 969 540 343
06-09 68° 83° 2794 1785 1002 566 364
06-10 59° 70° 2837 1817 1025 580 374
06-11 56° 78° 2882 1852 1050 597 386
06-12 59° 78° 2928 1889 1076 616 399
06-13 53° 70° 2967 1918 1095 627 405
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 54° 78° 3012 1952 1119 643 416
06-15 64° 86° 3064 1995 1152 668 436
06-16 68° 90° 3121 2042 1189 697 460
06-17 67° 89° 3177 2088 1225 725 483
06-18 68° 84° 3231 2131 1259 750 504
06-19 64° 74° 3278 2169 1286 770 518
06-20 63° 73° 3324 2204 1312 787 531
06-21 61° 85° 3375 2245 1343 810 549
06-22 62° 73° 3420 2281 1368 828 561
06-23 59° 76° 3465 2316 1393 845 573
06-24 57° 79° 3511 2352 1419 863 586
06-25 57° 84° 3560 2391 1448 884 602
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 68° 85° 3615 2435 1483 910 624
06-27 62° 85° 3666 2477 1514 934 642
06-28 65° 85° 3719 2520 1547 959 662
06-29 66° 79° 3769 2560 1577 981 679
06-30 72° 87° 3827 2607 1615 1010 704
07-01 72° 86° 3884 2654 1652 1039 728
07-02 71° 88° 3941 2702 1689 1069 752
07-03 69° 88° 3998 2748 1725 1097 775
07-04 70° 89° 4055 2796 1763 1127 800
07-05 71° 88° 4113 2843 1800 1156 824
07-06 75° 84° 4170 2890 1838 1185 849
07-07 69° 87° 4226 2936 1874 1213 872
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 73° 92° 4286 2987 1914 1246 899
07-09 73° 82° 4342 3033 1950 1274 922
07-10 65° 83° 4394 3075 1982 1298 941
07-11 66° 82° 4446 3117 2014 1322 960
07-12 63° 81° 4496 3157 2044 1344 977
07-13 63° 84° 4548 3198 2076 1367 995
07-14 67° 77° 4598 3238 2106 1389 1012
07-15 56° 79° 4643 3274 2131 1407 1025
07-16 59° 83° 4693 3313 2160 1428 1041
07-17 69° 89° 4750 3360 2197 1457 1065
07-18 69° 90° 4807 3408 2235 1487 1090
07-19 67° 82° 4860 3450 2268 1511 1110
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 63° 81° 4910 3491 2298 1534 1127
07-21 68° 80° 4962 3533 2330 1558 1146
07-22 57° 68° 5002 3563 2350 1570 1153
07-23 56° 81° 5049 3599 2377 1588 1166
07-24 70° 91° 5107 3648 2415 1619 1192
07-25 76° 85° 5165 3696 2453 1649 1217
07-26 69° 83° 5219 3740 2487 1675 1238
07-27 62° 81° 5269 3780 2517 1697 1255
07-28 67° 82° 5322 3822 2550 1721 1274
07-29 61° 83° 5372 3862 2580 1743 1292
07-30 63° 80° 5421 3902 2609 1765 1308
07-31 59° 82° 5470 3940 2638 1785 1324
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 62° 81° 5519 3980 2667 1807 1340
08-02 61° 71° 5563 4014 2691 1823 1351
08-03 54° 71° 5604 4045 2712 1836 1359
08-04 52° 75° 5646 4076 2734 1849 1368
08-05 56° 75° 5689 4110 2757 1865 1378
08-06 62° 78° 5737 4148 2785 1885 1393
08-07 66° 80° 5788 4189 2816 1908 1411
08-08 71° 82° 5843 4233 2850 1934 1432
08-09 68° 85° 5897 4278 2885 1961 1454
08-10 65° 76° 5946 4317 2914 1982 1470
08-11 59° 82° 5995 4356 2943 2003 1486
08-12 62° 75° 6041 4392 2969 2021 1499
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 69° 86° 6097 4438 3005 2049 1522
08-14 68° 84° 6151 4482 3039 2075 1543
08-15 57° 76° 6195 4516 3063 2091 1554
08-16 63° 83° 6246 4557 3094 2114 1572
08-17 64° 76° 6294 4595 3122 2134 1587
08-18 56° 79° 6340 4630 3148 2151 1600
08-19 60° 82° 6389 4669 3177 2172 1616
08-20 66° 82° 6441 4711 3209 2196 1635
08-21 69° 86° 6496 4757 3244 2224 1657
08-22 65° 83° 6548 4799 3276 2248 1676
08-23 69° 89° 6605 4846 3313 2277 1700
08-24 71° 87° 6662 4893 3350 2306 1724
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 70° 90° 6720 4941 3388 2336 1749
08-26 74° 91° 6781 4991 3429 2368 1777
08-27 73° 86° 6838 5039 3466 2398 1801
08-28 67° 80° 6890 5080 3498 2421 1819
08-29 58° 76° 6935 5115 3523 2438 1832
08-30 56° 76° 6979 5150 3547 2455 1843
08-31 59° 71° 7022 5183 3570 2470 1853
09-01 56° 69° 7063 5214 3591 2483 1861
09-02 56° 80° 7109 5250 3617 2501 1874
09-03 57° 71° 7151 5282 3639 2515 1883
09-04 51° 74° 7192 5313 3660 2528 1891
09-05 53° 77° 7235 5346 3683 2543 1901
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 63° 82° 7286 5386 3713 2565 1918
09-07 49° 67° 7321 5412 3729 2573 1921
09-08 46° 51° 7348 5428 3736 2573 1921
09-09 42° 49° 7371 5442 3739 2573 1921
09-10 38° 59° 7398 5458 3746 2573 1921
09-11 43° 59° 7427 5477 3755 2574 1921
09-12 55° 62° 7463 5504 3771 2582 1925
09-13 52° 72° 7503 5534 3791 2594 1932
09-14 55° 79° 7548 5569 3816 2611 1944
09-15 63° 80° 7598 5608 3845 2633 1960
09-16 55° 68° 7637 5638 3865 2644 1967
09-17 44° 56° 7665 5656 3873 2645 1967
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 39° 63° 7694 5675 3882 2646 1967
09-19 46° 70° 7730 5701 3898 2654 1970
09-20 54° 72° 7772 5732 3919 2667 1978
09-21 59° 78° 7818 5768 3946 2685 1991
09-22 60° 82° 7867 5807 3975 2706 2007
09-23 60° 83° 7916 5847 4004 2727 2023
09-24 60° 74° 7961 5882 4029 2745 2036
09-25 59° 84° 8011 5921 4059 2766 2052
09-26 59° 70° 8054 5954 4082 2781 2062
09-27 53° 64° 8090 5981 4098 2789 2066
09-28 50° 55° 8121 6001 4109 2792 2066
09-29 47° 63° 8154 6025 4122 2797 2066
2020Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 49° 61° 8187 6048 4135 2802 2066

 

Latest Updates

February 19th, 2021Welcome to the 2021 GDD Tracking Season

Despite the frigid temperatures covering most of the country this week, GDDtracker started counting on February 15. As temperatures warm and snow fall melts the first two models that gather the most attention are the Proxy/Primo timer for scheduling annual bluegrass seedhead suppression applications and the crabgrass preemergence application timer. As the season progresses the early season DMI timer and the Smith-Kerns dollar spot prediction model gather views. Further information on all models can be found under the "About" tab at the top of the screen. Thanks for your continued use and support of GDDtracker and best wishes for a successful 2021 growing season!