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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Relative Flowering Times for Broadleaf Weeds (GDD 50)
forecast for Fri, Nov. 15. 2024

 
  

Ankeny, IA

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2024 & 2023

2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 26° 44° 13 3 0 0 0
02-16 13° 28° 13 3 0 0 0
02-17 7° 31° 13 3 0 0 0
02-18 24° 41° 24 4 0 0 0
02-19 22° 57° 41 11 0 0 0
02-20 29° 64° 66 26 4 0 0
02-21 38° 62° 94 44 13 0 0
02-22 40° 64° 124 64 22 2 0
02-23 30° 54° 144 74 23 2 0
02-24 22° 51° 159 79 23 2 0
02-25 32° 65° 185 95 30 2 0
02-26 34° 78° 219 119 44 8 1
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 17° 60° 236 126 44 8 1
02-28 8° 31° 236 126 44 8 1
02-29 20° 57° 253 133 44 8 1
03-01 31° 54° 273 143 44 8 1
03-02 32° 69° 302 162 53 8 1
03-03 48° 79° 343 193 74 22 10
03-04 39° 45° 364 204 75 22 10
03-05 29° 56° 384 214 75 22 10
03-06 30° 58° 406 226 77 22 10
03-07 36° 56° 430 240 81 22 10
03-08 32° 45° 447 247 81 22 10
03-09 23° 47° 460 250 81 22 10
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 23° 57° 478 258 81 22 10
03-11 41° 76° 514 284 98 31 13
03-12 48° 68° 550 310 114 39 16
03-13 41° 71° 584 334 128 45 18
03-14 47° 57° 614 354 138 47 18
03-15 36° 58° 639 369 142 47 18
03-16 39° 52° 662 382 146 47 18
03-17 27° 39° 673 383 146 47 18
03-18 21° 36° 680 383 146 47 18
03-19 30° 65° 705 399 151 47 18
03-20 30° 46° 721 405 151 47 18
03-21 29° 49° 738 412 151 47 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 30° 43° 753 416 151 47 18
03-23 21° 36° 759 416 151 47 18
03-24 33° 47° 777 424 151 47 18
03-25 45° 63° 809 446 163 51 18
03-26 28° 51° 827 454 163 51 18
03-27 24° 42° 838 455 163 51 18
03-28 30° 56° 859 466 164 51 18
03-29 37° 68° 889 486 175 54 18
03-30 39° 60° 917 504 182 54 18
03-31 39° 60° 944 521 190 54 18
04-01 43° 48° 968 535 193 54 18
04-02 35° 47° 987 544 193 54 18
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 35° 54° 1009 556 195 54 18
04-04 31° 55° 1030 567 196 54 18
04-05 29° 57° 1051 578 197 54 18
04-06 35° 60° 1076 593 202 54 18
04-07 45° 67° 1110 616 216 59 18
04-08 46° 67° 1144 641 230 66 20
04-09 37° 67° 1174 661 241 68 20
04-10 42° 72° 1209 686 256 75 22
04-11 47° 60° 1241 708 267 79 22
04-12 40° 66° 1272 729 278 82 22
04-13 39° 84° 1312 759 298 94 29
04-14 58° 86° 1362 799 328 116 46
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 48° 75° 1401 828 348 127 52
04-16 60° 67° 1443 860 369 141 61
04-17 53° 65° 1480 887 386 150 65
04-18 46° 52° 1507 904 393 150 65
04-19 33° 56° 1529 916 396 150 65
04-20 32° 47° 1547 924 396 150 65
04-21 31° 52° 1566 933 396 150 65
04-22 38° 70° 1598 955 408 154 65
04-23 50° 69° 1635 982 425 163 69
04-24 41° 65° 1666 1003 436 166 69
04-25 48° 63° 1700 1027 449 171 69
04-26 49° 62° 1733 1050 463 177 70
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 58° 73° 1777 1084 486 192 80
04-28 58° 68° 1818 1115 507 205 88
04-29 48° 64° 1851 1138 521 211 89
04-30 46° 72° 1888 1165 538 220 93
05-01 50° 65° 1924 1191 553 227 95
05-02 51° 61° 1958 1214 567 233 96
05-03 40° 72° 1992 1239 581 239 97
05-04 50° 59° 2024 1261 594 244 97
05-05 42° 66° 2056 1283 606 248 97
05-06 51° 73° 2096 1313 626 260 104
05-07 55° 75° 2139 1346 649 275 114
05-08 55° 79° 2184 1381 674 292 126
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 50° 65° 2220 1407 690 299 129
05-10 47° 75° 2259 1436 709 311 135
05-11 49° 79° 2301 1468 731 325 144
05-12 55° 85° 2349 1506 759 345 159
05-13 60° 69° 2392 1539 782 360 169
05-14 57° 73° 2435 1572 805 375 179
05-15 52° 76° 2477 1604 827 388 188
05-16 61° 76° 2523 1640 853 407 201
05-17 55° 82° 2570 1677 880 426 215
05-18 63° 88° 2623 1720 913 451 235
05-19 56° 76° 2668 1755 937 467 247
05-20 63° 81° 2718 1795 968 490 264
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 59° 80° 2766 1833 995 509 279
05-22 52° 72° 2806 1863 1016 522 286
05-23 56° 78° 2851 1898 1041 539 298
05-24 59° 73° 2895 1932 1065 555 309
05-25 48° 77° 2936 1963 1086 567 317
05-26 60° 75° 2981 1998 1111 585 329
05-27 54° 77° 3025 2032 1134 600 339
05-28 54° 73° 3066 2063 1156 614 348
05-29 51° 74° 3106 2093 1176 626 355
05-30 55° 78° 3151 2128 1200 642 367
05-31 62° 80° 3200 2167 1230 664 383
06-01 65° 78° 3249 2206 1259 685 399
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 61° 82° 3299 2246 1289 707 416
06-03 70° 89° 3356 2293 1326 736 440
06-04 68° 82° 3409 2336 1359 761 460
06-05 56° 84° 3457 2374 1387 781 475
06-06 59° 81° 3506 2412 1415 801 490
06-07 56° 80° 3552 2449 1441 819 504
06-08 65° 78° 3601 2488 1471 841 520
06-09 55° 82° 3648 2525 1497 859 534
06-10 55° 75° 3691 2558 1520 874 544
06-11 57° 88° 3742 2599 1551 897 562
06-12 63° 90° 3796 2643 1586 924 583
06-13 72° 90° 3855 2692 1625 955 609
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 61° 87° 3908 2735 1657 979 629
06-15 67° 84° 3961 2778 1691 1005 649
06-16 68° 91° 4019 2826 1728 1034 674
06-17 75° 91° 4080 2877 1770 1067 702
06-18 76° 88° 4140 2927 1810 1100 729
06-19 67° 72° 4188 2965 1837 1119 744
06-20 65° 81° 4239 3006 1868 1142 761
06-21 72° 89° 4297 3054 1907 1173 787
06-22 77° 87° 4357 3104 1947 1205 814
06-23 67° 87° 4412 3149 1982 1232 836
06-24 71° 94° 4473 3199 2022 1264 863
06-25 76° 94° 4535 3252 2065 1299 893
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 69° 87° 4591 3298 2101 1327 916
06-27 63° 79° 4640 3337 2130 1348 932
06-28 67° 77° 4690 3377 2160 1370 949
06-29 64° 79° 4740 3416 2189 1391 965
06-30 55° 76° 4783 3450 2213 1406 976
07-01 59° 71° 4826 3483 2236 1421 986
07-02 63° 77° 4874 3521 2264 1442 1001
07-03 63° 84° 4926 3562 2295 1465 1019
07-04 69° 82° 4979 3606 2329 1490 1040
07-05 62° 77° 5026 3643 2356 1510 1054
07-06 59° 83° 5075 3682 2385 1531 1070
07-07 64° 81° 5126 3723 2416 1553 1088
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 61° 81° 5175 3762 2445 1575 1104
07-09 64° 82° 5226 3803 2475 1597 1122
07-10 66° 80° 5277 3844 2506 1620 1140
07-11 63° 82° 5327 3884 2537 1643 1157
07-12 63° 85° 5379 3926 2569 1667 1176
07-13 71° 90° 5438 3975 2607 1697 1201
07-14 76° 92° 5500 4027 2650 1732 1231
07-15 71° 94° 5561 4078 2690 1764 1259
07-16 69° 78° 5612 4119 2722 1788 1277
07-17 63° 78° 5661 4158 2751 1809 1293
07-18 56° 77° 5706 4193 2776 1826 1305
07-19 59° 80° 5754 4231 2803 1845 1320
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 64° 74° 5801 4268 2831 1864 1334
07-21 62° 81° 5850 4307 2860 1886 1350
07-22 63° 80° 5900 4347 2889 1907 1367
07-23 64° 83° 5951 4388 2921 1931 1385
07-24 67° 85° 6005 4432 2955 1956 1406
07-25 69° 82° 6058 4475 2988 1982 1426
07-26 70° 88° 6115 4522 3025 2011 1450
07-27 71° 87° 6172 4569 3062 2040 1474
07-28 69° 89° 6230 4617 3099 2069 1499
07-29 68° 88° 6286 4663 3135 2097 1522
07-30 67° 84° 6339 4706 3169 2123 1542
07-31 69° 87° 6395 4752 3205 2151 1565
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 69° 84° 6450 4797 3240 2178 1587
08-02 69° 86° 6506 4843 3275 2205 1610
08-03 69° 90° 6563 4890 3313 2235 1634
08-04 71° 93° 6624 4940 3353 2267 1661
08-05 74° 93° 6685 4992 3395 2301 1690
08-06 62° 81° 6735 5032 3424 2322 1707
08-07 58° 79° 6781 5068 3451 2341 1720
08-08 63° 75° 6829 5106 3478 2360 1735
08-09 55° 72° 6870 5137 3499 2373 1743
08-10 52° 76° 6912 5169 3521 2387 1751
08-11 57° 77° 6957 5203 3546 2404 1763
08-12 62° 70° 7001 5238 3570 2420 1775
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 65° 74° 7048 5275 3598 2439 1789
08-14 66° 78° 7098 5315 3628 2462 1806
08-15 69° 85° 7154 5360 3663 2489 1828
08-16 67° 84° 7207 5404 3697 2515 1849
08-17 65° 80° 7257 5444 3727 2537 1866
08-18 63° 82° 7308 5485 3757 2559 1884
08-19 61° 79° 7356 5523 3786 2580 1899
08-20 57° 76° 7400 5557 3810 2596 1910
08-21 62° 76° 7448 5594 3837 2615 1924
08-22 55° 77° 7492 5629 3861 2631 1935
08-23 56° 80° 7538 5665 3888 2649 1949
08-24 64° 85° 7591 5708 3920 2674 1968
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 72° 92° 7651 5758 3960 2706 1995
08-26 74° 98° 7715 5811 4004 2742 2026
08-27 74° 90° 7775 5862 4045 2775 2054
08-28 68° 86° 7830 5907 4080 2802 2076
08-29 70° 91° 7889 5956 4118 2832 2101
08-30 66° 79° 7939 5996 4149 2855 2119
08-31 57° 82° 7987 6034 4176 2874 2133
09-01 60° 75° 8032 6069 4202 2892 2146
09-02 50° 75° 8073 6100 4223 2904 2154
09-03 52° 78° 8116 6133 4246 2920 2164
09-04 52° 81° 8161 6168 4271 2936 2176
09-05 62° 78° 8209 6206 4298 2956 2191
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 53° 72° 8249 6236 4319 2969 2198
09-07 48° 71° 8286 6263 4336 2978 2202
09-08 49° 75° 8326 6293 4356 2990 2209
09-09 52° 83° 8372 6329 4381 3007 2221
09-10 57° 83° 8420 6367 4410 3027 2237
09-11 60° 86° 8471 6408 4440 3050 2255
09-12 58° 85° 8520 6447 4470 3072 2271
09-13 61° 77° 8567 6484 4497 3091 2285
09-14 68° 81° 8620 6527 4529 3115 2305
09-15 65° 88° 8674 6571 4564 3141 2326
09-16 64° 85° 8727 6614 4596 3166 2346
09-17 64° 87° 8780 6657 4630 3191 2366
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 65° 87° 8834 6701 4664 3218 2387
09-19 67° 88° 8890 6747 4699 3245 2410
09-20 62° 90° 8944 6791 4733 3271 2430
09-21 65° 89° 8998 6835 4768 3298 2452
09-22 56° 73° 9041 6868 4791 3313 2462
09-23 49° 72° 9079 6896 4809 3323 2467
09-24 57° 72° 9122 6929 4832 3337 2477
09-25 51° 79° 9165 6961 4854 3352 2486
09-26 51° 80° 9208 6995 4878 3368 2497
09-27 52° 81° 9253 7030 4903 3385 2509
09-28 58° 87° 9304 7071 4933 3407 2526
09-29 57° 85° 9353 7109 4962 3428 2542
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 55° 85° 9400 7147 4990 3448 2557
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 22° 43° 10 0 0 0 0
02-16 15° 25° 10 0 0 0 0
02-17 3° 29° 10 0 0 0 0
02-18 23° 46° 23 3 0 0 0
02-19 31° 44° 39 9 0 0 0
02-20 24° 49° 54 14 0 0 0
02-21 18° 34° 58 14 0 0 0
02-22 30° 32° 67 14 0 0 0
02-23 7° 32° 67 14 0 0 0
02-24 5° 21° 67 14 0 0 0
02-25 11° 43° 72 14 0 0 0
02-26 23° 57° 90 22 0 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 47° 109 31 0 0 0
02-28 25° 43° 121 33 0 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 29° 52° 140 41 0 0 0
03-02 27° 39° 151 43 0 0 0
03-03 30° 51° 170 51 0 0 0
03-04 29° 49° 187 59 0 0 0
03-05 28° 52° 205 67 0 0 0
03-06 35° 42° 222 73 0 0 0
03-07 32° 47° 239 81 0 0 0
03-08 34° 41° 254 86 0 0 0
03-09 32° 37° 266 88 0 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 29° 34° 276 88 0 0 0
03-11 29° 35° 286 88 0 0 0
03-12 24° 32° 292 88 0 0 0
03-13 23° 27° 295 88 0 0 0
03-14 18° 36° 300 88 0 0 0
03-15 31° 56° 322 100 2 0 0
03-16 27° 48° 338 105 2 0 0
03-17 17° 32° 340 105 2 0 0
03-18 9° 27° 340 105 2 0 0
03-19 11° 45° 346 105 2 0 0
03-20 31° 60° 370 119 5 0 0
03-21 36° 54° 393 132 8 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 37° 55° 417 146 12 0 0
03-23 31° 41° 431 150 12 0 0
03-24 26° 53° 448 157 12 0 0
03-25 33° 54° 469 169 14 0 0
03-26 32° 39° 483 173 14 0 0
03-27 24° 47° 497 176 14 0 0
03-28 27° 50° 513 182 14 0 0
03-29 25° 41° 524 184 14 0 0
03-30 30° 69° 552 201 21 0 0
03-31 38° 79° 588 228 38 9 4
04-01 33° 50° 608 237 38 9 4
04-02 34° 73° 640 259 50 12 4
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 37° 53° 663 273 53 12 4
04-04 44° 67° 697 296 67 18 4
04-05 32° 59° 720 309 70 18 4
04-06 28° 54° 739 319 70 18 4
04-07 34° 66° 767 337 78 18 4
04-08 45° 69° 802 362 93 25 6
04-09 44° 71° 838 387 108 33 9
04-10 48° 72° 876 415 127 43 14
04-11 47° 79° 917 446 148 56 22
04-12 59° 84° 967 486 177 78 39
04-13 54° 83° 1013 523 204 96 52
04-14 52° 82° 1059 558 229 113 65
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 39° 65° 1089 578 240 116 65
04-16 34° 39° 1104 583 240 116 65
04-17 34° 59° 1129 598 245 116 65
04-18 33° 65° 1156 615 252 116 65
04-19 53° 76° 1198 648 274 130 74
04-20 41° 63° 1228 668 284 132 74
04-21 36° 46° 1247 677 284 132 74
04-22 32° 40° 1261 681 284 132 74
04-23 29° 50° 1279 688 284 132 74
04-24 32° 62° 1304 703 289 132 74
04-25 40° 60° 1332 721 297 132 74
04-26 36° 62° 1359 739 305 132 74
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 42° 71° 1394 763 319 139 76
04-28 47° 71° 1430 790 336 148 79
04-29 39° 58° 1457 806 342 148 79
04-30 39° 57° 1483 822 348 148 79
05-01 41° 62° 1512 842 358 149 79
05-02 40° 65° 1542 862 368 151 79
05-03 35° 70° 1573 883 379 154 79
05-04 43° 80° 1613 912 398 166 86
05-05 54° 71° 1653 943 419 178 94
05-06 57° 76° 1697 977 443 194 105
05-07 57° 78° 1743 1013 469 212 118
05-08 58° 76° 1789 1048 494 230 130
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 54° 74° 1831 1080 516 244 139
05-10 56° 82° 1878 1117 543 263 153
05-11 62° 82° 1928 1157 573 285 170
05-12 65° 79° 1978 1197 603 306 187
05-13 67° 76° 2027 1237 633 328 203
05-14 54° 71° 2067 1267 653 340 211
05-15 53° 62° 2103 1292 668 348 213
05-16 57° 80° 2149 1329 695 366 227
05-17 54° 79° 2194 1363 719 383 238
05-18 55° 82° 2240 1400 746 401 252
05-19 51° 65° 2276 1426 762 409 255
05-20 43° 72° 2312 1451 777 417 257
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 49° 76° 2352 1482 798 429 264
05-22 54° 75° 2394 1514 820 443 274
05-23 54° 82° 2440 1550 846 461 287
05-24 56° 85° 2489 1588 874 481 302
05-25 58° 79° 2535 1625 901 500 316
05-26 49° 78° 2577 1656 922 514 324
05-27 48° 81° 2619 1689 945 528 334
05-28 51° 83° 2664 1724 970 545 346
05-29 55° 86° 2713 1762 998 566 361
05-30 63° 88° 2766 1805 1031 591 381
05-31 63° 88° 2820 1849 1065 617 402
06-01 66° 79° 2870 1890 1096 639 420
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 66° 85° 2924 1934 1130 665 440
06-03 66° 88° 2979 1979 1165 692 463
06-04 66° 89° 3035 2024 1200 719 485
06-05 64° 85° 3087 2066 1232 744 504
06-06 63° 90° 3141 2111 1267 770 525
06-07 66° 78° 3191 2151 1297 792 543
06-08 61° 75° 3238 2187 1323 811 556
06-09 55° 79° 3283 2222 1348 828 568
06-10 58° 81° 3331 2260 1376 847 583
06-11 60° 71° 3374 2293 1399 863 593
06-12 46° 77° 3413 2323 1419 874 600
06-13 59° 84° 3463 2363 1449 896 617
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 60° 88° 3515 2405 1481 920 636
06-15 61° 89° 3569 2448 1514 945 656
06-16 59° 78° 3615 2484 1540 964 669
06-17 59° 85° 3665 2524 1570 986 686
06-18 63° 82° 3715 2565 1601 1008 703
06-19 63° 87° 3768 2607 1633 1033 723
06-20 65° 86° 3821 2651 1667 1058 744
06-21 64° 86° 3874 2694 1700 1083 764
06-22 65° 88° 3929 2739 1735 1110 785
06-23 65° 89° 3984 2784 1770 1137 808
06-24 67° 83° 4037 2826 1802 1162 827
06-25 64° 78° 4086 2865 1831 1183 843
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 62° 77° 4134 2903 1859 1203 858
06-27 57° 83° 4182 2942 1888 1223 873
06-28 67° 85° 4236 2985 1921 1249 894
06-29 69° 88° 4292 3032 1958 1277 918
06-30 69° 84° 4347 3076 1992 1304 939
07-01 69° 74° 4397 3116 2022 1325 956
07-02 67° 86° 4451 3160 2056 1352 977
07-03 65° 89° 4506 3206 2092 1379 1000
07-04 69° 90° 4564 3253 2129 1409 1024
07-05 67° 79° 4615 3295 2161 1432 1043
07-06 56° 76° 4659 3328 2184 1448 1053
07-07 53° 69° 4698 3358 2204 1459 1060
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 56° 78° 4743 3393 2229 1476 1072
07-09 53° 82° 4789 3428 2254 1494 1084
07-10 59° 88° 4841 3470 2286 1517 1103
07-11 67° 87° 4895 3515 2321 1544 1125
07-12 66° 78° 4945 3554 2350 1566 1141
07-13 62° 84° 4996 3596 2382 1589 1160
07-14 68° 85° 5051 3640 2416 1616 1181
07-15 65° 84° 5103 3683 2449 1640 1201
07-16 64° 81° 5154 3723 2479 1663 1218
07-17 63° 76° 5201 3761 2507 1682 1232
07-18 57° 79° 5247 3797 2533 1700 1246
07-19 61° 82° 5297 3836 2562 1722 1262
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 68° 81° 5350 3879 2595 1747 1282
07-21 59° 80° 5398 3917 2623 1766 1297
07-22 61° 85° 5449 3958 2654 1790 1315
07-23 66° 86° 5503 4002 2688 1816 1336
07-24 64° 89° 5557 4047 2723 1842 1358
07-25 68° 88° 5613 4093 2759 1870 1381
07-26 73° 93° 5675 4144 2800 1904 1409
07-27 71° 90° 5733 4192 2838 1934 1434
07-28 74° 97° 5796 4246 2882 1969 1465
07-29 69° 86° 5852 4291 2917 1997 1487
07-30 64° 86° 5905 4334 2950 2022 1507
07-31 66° 84° 5958 4377 2983 2047 1527
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 66° 87° 6012 4422 3018 2073 1549
08-02 69° 76° 6063 4463 3049 2096 1567
08-03 68° 82° 6116 4506 3082 2121 1587
08-04 65° 86° 6170 4549 3115 2147 1607
08-05 70° 86° 6226 4595 3151 2175 1630
08-06 65° 74° 6274 4633 3179 2195 1645
08-07 64° 80° 6324 4673 3209 2217 1662
08-08 63° 82° 6374 4714 3240 2239 1680
08-09 65° 80° 6425 4754 3270 2262 1697
08-10 63° 84° 6476 4796 3302 2285 1716
08-11 65° 89° 6531 4841 3337 2312 1738
08-12 66° 86° 6585 4885 3371 2338 1759
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 66° 78° 6635 4925 3401 2360 1776
08-14 61° 73° 6680 4960 3426 2377 1788
08-15 57° 78° 6726 4995 3451 2395 1800
08-16 57° 84° 6774 5034 3480 2415 1816
08-17 63° 77° 6822 5072 3508 2435 1831
08-18 53° 80° 6867 5107 3533 2452 1842
08-19 64° 92° 6923 5153 3569 2480 1866
08-20 76° 92° 6986 5205 3611 2515 1895
08-21 73° 91° 7045 5255 3651 2546 1922
08-22 73° 96° 7108 5308 3694 2581 1952
08-23 76° 98° 7173 5363 3739 2618 1984
08-24 78° 96° 7239 5418 3784 2656 2016
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 74° 89° 7298 5467 3823 2687 2042
08-26 67° 83° 7351 5511 3857 2712 2063
08-27 59° 78° 7398 5547 3883 2731 2076
08-28 55° 84° 7445 5585 3911 2750 2090
08-29 63° 85° 7497 5626 3942 2774 2109
08-30 58° 82° 7545 5665 3971 2794 2124
08-31 54° 82° 7591 5701 3997 2812 2137
09-01 55° 87° 7640 5740 4026 2833 2153
09-02 61° 95° 7696 5786 4062 2861 2176
09-03 63° 96° 7754 5833 4099 2891 2201
09-04 67° 96° 7813 5882 4138 2922 2227
09-05 74° 92° 7874 5933 4179 2955 2255
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 61° 75° 7920 5969 4205 2973 2268
09-07 50° 79° 7962 6002 4228 2987 2278
09-08 57° 82° 8010 6039 4255 3007 2292
09-09 54° 83° 8056 6076 4282 3025 2306
09-10 62° 77° 8104 6114 4310 3045 2321
09-11 59° 75° 8149 6149 4335 3062 2332
09-12 49° 77° 8190 6179 4355 3075 2340
09-13 52° 79° 8234 6213 4379 3090 2351
09-14 52° 82° 8278 6248 4404 3107 2362
09-15 57° 80° 8324 6284 4430 3125 2376
09-16 56° 81° 8371 6320 4456 3144 2389
09-17 53° 74° 8412 6352 4478 3157 2397
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 48° 80° 8454 6384 4500 3171 2407
09-19 59° 71° 8498 6417 4523 3187 2417
09-20 57° 80° 8544 6454 4550 3205 2431
09-21 55° 80° 8590 6489 4575 3223 2443
09-22 62° 71° 8634 6524 4600 3239 2455
09-23 62° 81° 8684 6563 4629 3261 2471
09-24 62° 79° 8733 6602 4658 3282 2487
09-25 57° 79° 8779 6638 4684 3300 2500
09-26 58° 74° 8823 6672 4708 3316 2511
09-27 56° 74° 8866 6705 4731 3331 2521
09-28 53° 76° 8908 6737 4753 3345 2530
09-29 60° 91° 8962 6781 4787 3371 2551
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 67° 93° 9020 6829 4825 3401 2576

 

Latest Updates

March 18th, 2024Timing crabgrass preemergence applications in spring

Don't miss this update from from Kevin Frank regarding timing of crabgrass preemergence herbicides.


 

February 12th, 2024Welcome to the 2024 GDD Tracking Season

2024 might be the year that if you blinked you missed winter. We've already experienced some very unseasonably warm weather in February with temperatures in the 60's. Temperatures are remaining relatively mild but I wouldn't be surprised if winter resurfaced yet as we move through the rest of February and March. GDDTracker starts counting on February 15. Spring is typically the time of year when GDDTracker receives the most attention for alerting turfgrass managers of optimal application timing windows for suppressing annual bluegrass seedheads and crabgrass preemergence applications. However, there are many models you may find helpful throughout the season including the early season DMI timer and 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 fantastic 2024!
 

 

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