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Crabgrass Germination Prediction (GDD 50)
through Sun, Oct. 18. 2026

 
  

Terre Haute, IN

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2025 & 2026

2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 38° 54° 24 14 4 0 0
02-16 32° 59° 48 28 8 0 0
02-17 37° 53° 71 41 11 0 0
02-18 50° 70° 109 69 29 10 5
02-19 49° 65° 144 94 44 17 7
02-20 32° 57° 166 106 46 17 7
02-21 26° 37° 175 106 46 17 7
02-22 19° 30° 178 106 46 17 7
02-23 17° 31° 180 106 46 17 7
02-24 20° 40° 188 106 46 17 7
02-25 34° 51° 208 116 46 17 7
02-26 32° 50° 227 126 46 17 7
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 33° 66° 255 143 54 17 7
02-28 35° 60° 280 158 59 17 7
03-01 29° 39° 292 161 59 17 7
03-02 31° 41° 306 165 59 17 7
03-03 37° 45° 325 174 59 17 7
03-04 45° 58° 355 194 69 19 7
03-05 54° 61° 391 219 85 26 10
03-06 58° 77° 436 255 110 44 22
03-07 45° 67° 470 278 124 50 23
03-08 39° 58° 497 295 131 50 23
03-09 44° 67° 530 319 144 55 23
03-10 62° 77° 578 356 172 75 38
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 39° 71° 611 379 185 80 38
03-12 31° 49° 629 387 185 80 38
03-13 42° 56° 656 404 192 80 38
03-14 37° 54° 679 418 195 80 38
03-15 44° 69° 714 442 209 86 39
03-16 25° 40° 724 442 209 86 39
03-17 17° 27° 724 442 209 86 39
03-18 26° 55° 742 451 209 86 39
03-19 37° 71° 775 473 221 90 39
03-20 48° 82° 818 506 244 105 49
03-21 45° 78° 857 536 264 117 56
03-22 41° 86° 899 567 286 130 65
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 34° 47° 918 576 286 130 65
03-24 30° 56° 939 587 287 130 65
03-25 38° 71° 972 610 300 135 65
03-26 57° 86° 1021 649 329 157 81
03-27 38° 55° 1046 664 334 157 81
03-28 30° 51° 1064 672 334 157 81
03-29 38° 68° 1095 693 345 160 81
03-30 54° 78° 1139 727 369 176 92
03-31 61° 81° 1188 766 398 197 108
04-01 49° 70° 1225 794 415 206 113
04-02 49° 80° 1268 826 438 220 122
04-03 65° 77° 1317 865 467 242 138
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 46° 70° 1353 892 483 250 141
04-05 41° 53° 1379 907 489 250 141
04-06 40° 57° 1406 924 495 250 141
04-07 36° 49° 1426 934 496 250 141
04-08 38° 71° 1459 957 508 255 141
04-09 53° 77° 1502 990 532 270 152
04-10 52° 69° 1540 1019 550 280 157
04-11 42° 71° 1575 1043 565 287 159
04-12 57° 80° 1621 1080 591 305 172
04-13 67° 80° 1673 1121 623 329 191
04-14 68° 84° 1727 1165 657 355 212
04-15 67° 79° 1778 1206 688 378 230
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 61° 77° 1825 1243 715 397 244
04-17 53° 82° 1871 1279 741 415 257
04-18 45° 75° 1909 1307 758 425 261
04-19 35° 60° 1934 1322 764 425 261
04-20 34° 60° 1959 1337 769 425 261
04-21 46° 77° 1999 1367 789 436 268
04-22 60° 80° 2047 1405 816 456 283
04-23 55° 83° 2093 1442 843 475 297
04-24 59° 72° 2137 1475 867 490 307
04-25 52° 74° 2178 1506 888 503 315
04-26 51° 78° 2220 1538 910 517 324
04-27 59° 65° 2260 1568 930 530 331
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 57° 64° 2299 1597 949 540 337
04-29 50° 63° 2334 1622 963 547 339
04-30 40° 61° 2362 1640 972 547 339
05-01 46° 55° 2390 1659 980 548 339
05-02 43° 55° 2418 1676 987 548 339
05-03 39° 64° 2447 1695 997 549 339
05-04 54° 75° 2490 1728 1020 564 349
05-05 47° 69° 2526 1754 1036 572 352
05-06 46° 59° 2556 1774 1046 574 352
05-07 38° 62° 2584 1792 1054 575 352
05-08 49° 68° 2621 1819 1070 583 355
05-09 53° 73° 2662 1850 1092 596 363
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 53° 69° 2701 1879 1111 607 370
05-11 45° 73° 2738 1906 1128 616 373
05-12 44° 79° 2777 1935 1147 627 380
05-13 56° 69° 2817 1966 1167 640 387
05-14 41° 67° 2849 1988 1179 644 387
05-15 49° 73° 2889 2017 1199 655 393
05-16 63° 77° 2937 2055 1227 675 408
05-17 64° 84° 2989 2097 1259 699 427
05-18 67° 80° 3040 2139 1290 723 446
05-19 65° 84° 3093 2181 1323 747 466
05-20 59° 70° 3136 2214 1345 762 475
05-21 55° 67° 3175 2243 1365 773 482
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 57° 66° 3215 2273 1385 785 488
05-23 58° 71° 3257 2306 1407 800 498
05-24 60° 74° 3303 2341 1433 817 510
05-25 51° 78° 3345 2374 1455 832 520
05-26 59° 75° 3391 2409 1481 849 532
05-27 67° 79° 3442 2450 1512 872 551
05-28 64° 83° 3494 2492 1544 896 569
05-29 60° 82° 3543 2531 1573 917 585
05-30 60° 83° 3593 2571 1603 939 602
05-31 57° 80° 3639 2607 1629 957 616
06-01 61° 83° 3689 2647 1659 979 632
06-02 58° 80° 3736 2684 1685 998 646
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 54° 83° 3782 2720 1712 1016 660
06-04 56° 85° 3830 2759 1740 1037 675
06-05 64° 85° 3883 2801 1773 1061 694
06-06 72° 89° 3942 2850 1811 1092 720
06-07 68° 89° 3998 2896 1848 1121 744
06-08 74° 80° 4053 2941 1883 1147 765
06-09 73° 88° 4111 2990 1921 1178 791
06-10 76° 91° 4173 3041 1963 1211 819
06-11 68° 90° 4230 3088 2000 1240 843
06-12 68° 80° 4282 3130 2032 1264 863
06-13 61° 79° 4330 3169 2060 1285 878
06-14 62° 74° 4376 3205 2086 1303 891
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 58° 74° 4421 3239 2111 1319 902
06-16 57° 76° 4465 3273 2135 1335 913
06-17 55° 76° 4508 3307 2158 1351 924
06-18 66° 74° 4557 3345 2186 1371 939
06-19 58° 79° 4603 3381 2213 1390 953
06-20 65° 80° 4654 3422 2244 1412 971
06-21 59° 77° 4700 3458 2270 1430 984
06-22 62° 70° 4744 3493 2294 1447 995
06-23 57° 77° 4789 3527 2319 1464 1007
06-24 57° 79° 4835 3563 2345 1481 1020
06-25 67° 81° 4887 3605 2377 1505 1038
06-26 69° 73° 4936 3644 2406 1526 1054
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 71° 82° 4990 3688 2440 1553 1076
06-28 72° 87° 5048 3736 2478 1582 1100
06-29 75° 90° 5108 3787 2518 1615 1128
06-30 75° 91° 5169 3837 2559 1648 1156
07-01 74° 91° 5230 3888 2600 1680 1183
07-02 72° 92° 5290 3939 2640 1713 1211
07-03 75° 91° 5351 3990 2681 1746 1239
07-04 71° 88° 5409 4037 2719 1775 1264
07-05 70° 84° 5464 4082 2754 1802 1285
07-06 70° 83° 5518 4127 2788 1829 1307
07-07 70° 84° 5574 4172 2823 1856 1329
07-08 66° 86° 5627 4216 2857 1882 1350
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 69° 86° 5683 4262 2893 1910 1373
07-10 68° 86° 5738 4306 2928 1936 1394
07-11 71° 81° 5792 4350 2962 1962 1415
07-12 69° 86° 5847 4395 2997 1989 1438
07-13 65° 85° 5900 4439 3030 2015 1458
07-14 66° 89° 5956 4484 3066 2042 1480
07-15 69° 90° 6013 4531 3103 2072 1505
07-16 71° 88° 6071 4579 3141 2101 1529
07-17 74° 88° 6130 4628 3180 2132 1555
07-18 74° 88° 6189 4677 3219 2164 1582
07-19 71° 84° 6245 4723 3255 2191 1604
07-20 66° 84° 6298 4766 3288 2216 1624
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 73° 88° 6357 4815 3326 2247 1650
07-22 63° 75° 6404 4852 3354 2266 1664
07-23 54° 77° 6447 4886 3377 2282 1675
07-24 57° 79° 6493 4921 3403 2300 1688
07-25 65° 73° 6540 4959 3430 2319 1702
07-26 67° 82° 6593 5001 3463 2343 1721
07-27 72° 91° 6652 5051 3502 2375 1748
07-28 69° 81° 6705 5094 3535 2400 1768
07-29 60° 82° 6754 5133 3564 2421 1784
07-30 61° 84° 6805 5173 3595 2443 1801
07-31 62° 79° 6854 5212 3624 2464 1817
08-01 69° 74° 6904 5252 3653 2486 1834
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 67° 79° 6955 5293 3685 2509 1852
08-03 63° 82° 7005 5334 3715 2532 1870
08-04 60° 83° 7055 5373 3745 2553 1886
08-05 59° 85° 7105 5413 3775 2575 1903
08-06 68° 78° 7155 5454 3805 2598 1921
08-07 66° 87° 7210 5498 3840 2624 1942
08-08 72° 88° 7268 5546 3878 2654 1967
08-09 70° 87° 7324 5593 3914 2683 1991
08-10 75° 88° 7384 5642 3954 2714 2017
08-11 68° 88° 7440 5688 3990 2742 2040
08-12 69° 80° 7492 5731 4022 2767 2060
08-13 69° 86° 7548 5776 4058 2794 2083
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 69° 79° 7600 5818 4090 2818 2102
08-15 71° 83° 7655 5864 4125 2846 2124
08-16 72° 86° 7713 5911 4163 2875 2148
08-17 71° 80° 7766 5955 4196 2901 2169
08-18 62° 82° 7817 5995 4227 2923 2186
08-19 67° 82° 7869 6037 4259 2947 2206
08-20 66° 81° 7921 6079 4291 2971 2224
08-21 62° 83° 7971 6119 4321 2994 2242
08-22 65° 80° 8022 6160 4352 3016 2259
08-23 59° 79° 8069 6197 4379 3035 2273
08-24 54° 77° 8112 6231 4402 3051 2284
08-25 55° 80° 8158 6266 4427 3068 2296
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 62° 86° 8210 6308 4460 3092 2315
08-27 63° 81° 8260 6348 4490 3114 2332
08-28 61° 84° 8310 6389 4520 3137 2350
08-29 56° 83° 8358 6426 4548 3156 2365
08-30 62° 90° 8412 6471 4582 3183 2386
08-31 69° 94° 8472 6520 4621 3214 2412
09-01 72° 96° 8534 6572 4664 3248 2441
09-02 72° 96° 8596 6624 4706 3282 2471
09-03 72° 96° 8658 6677 4748 3317 2500
09-04 72° 97° 8721 6729 4791 3351 2529
09-05 72° 95° 8783 6781 4832 3385 2558
09-06 67° 84° 8836 6824 4866 3410 2579
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 60° 83° 8885 6864 4895 3432 2595
09-08 59° 89° 8937 6905 4927 3456 2614
09-09 71° 90° 8996 6954 4966 3486 2639
09-10 68° 78° 9047 6995 4997 3509 2657
09-11 65° 83° 9099 7037 5029 3533 2676
09-12 70° 88° 9156 7084 5066 3562 2701
09-13 65° 84° 9208 7127 5098 3587 2720
09-14 56° 80° 9255 7163 5124 3605 2733
09-15 63° 96° 9312 7210 5162 3634 2758
09-16 71° 92° 9372 7260 5201 3666 2784
09-17 70° 94° 9432 7310 5242 3698 2811
09-18 71° 89° 9490 7358 5279 3728 2836
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 68° 88° 9545 7404 5315 3756 2859
09-20 70° 87° 9602 7450 5351 3784 2882
09-21 62° 71° 9646 7485 5376 3801 2894
09-22 58° 67° 9687 7515 5397 3813 2901
09-23 59° 65° 9727 7545 5417 3825 2908
09-24 60° 69° 9770 7578 5440 3840 2918
09-25 55° 73° 9812 7610 5461 3854 2927
09-26 53° 73° 9853 7641 5483 3867 2935
09-27 47° 73° 9891 7669 5501 3877 2940
09-28 47° 76° 9930 7699 5520 3889 2947
09-29 48° 77° 9971 7729 5541 3901 2954
09-30 59° 84° 10020 7768 5570 3922 2970
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 33° 42° 16 6 0 0 0
02-16 18° 35° 20 6 0 0 0
02-17 6° 19° 20 6 0 0 0
02-18 6° 17° 20 6 0 0 0
02-19 11° 20° 20 6 0 0 0
02-20 4° 20° 20 6 0 0 0
02-21 7° 28° 20 6 0 0 0
02-22 12° 35° 22 6 0 0 0
02-23 22° 47° 34 8 0 0 0
02-24 33° 54° 56 20 2 0 0
02-25 36° 61° 82 36 8 0 0
02-26 33° 63° 108 52 14 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 56° 132 66 18 0 0
02-28 32° 68° 161 85 27 0 0
03-01 24° 46° 174 87 27 0 0
03-02 15° 38° 178 87 27 0 0
03-03 26° 53° 196 95 27 0 0
03-04 46° 65° 229 119 40 6 1
03-05 33° 55° 251 131 42 6 1
03-06 30° 43° 266 136 42 6 1
03-07 32° 53° 287 147 43 6 1
03-08 32° 51° 307 156 43 6 1
03-09 31° 60° 331 170 47 6 1
03-10 33° 69° 360 190 56 7 1
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 45° 73° 397 217 73 17 5
03-12 40° 75° 433 243 89 24 8
03-13 44° 78° 472 272 108 35 14
03-14 52° 80° 516 306 132 51 25
03-15 57° 72° 559 338 154 66 34
03-16 32° 56° 581 350 157 66 34
03-17 28° 52° 599 358 157 66 34
03-18 43° 76° 636 386 174 75 38
03-19 48° 69° 673 412 190 83 42
03-20 33° 47° 691 420 190 83 42
03-21 29° 57° 712 432 192 83 42
03-22 40° 53° 737 446 197 83 42
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 38° 50° 759 458 199 83 42
03-24 36° 55° 783 472 203 83 42
03-25 37° 49° 804 483 204 83 42
03-26 32° 58° 827 496 207 83 42
03-27 43° 55° 854 513 214 83 42
03-28 49° 81° 897 547 237 99 52
03-29 62° 69° 941 580 261 114 63
03-30 57° 72° 983 613 283 129 72
03-31 37° 55° 1008 627 288 129 72
04-01 31° 56° 1029 638 289 129 72
04-02 48° 80° 1071 670 311 143 81
04-03 51° 65° 1107 696 327 151 84
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 46° 55° 1136 715 336 152 84
04-05 44° 60° 1166 735 346 154 84
04-06 40° 48° 1187 747 347 154 84
04-07 34° 57° 1211 760 351 154 84
04-08 27° 44° 1224 764 351 154 84
04-09 32° 53° 1245 774 351 154 84
04-10 39° 67° 1276 795 362 157 84
04-11 40° 53° 1300 810 367 157 84
04-12 31° 60° 1324 823 370 157 84
04-13 47° 70° 1360 850 387 165 88
04-14 53° 72° 1401 881 408 178 95
04-15 44° 57° 1430 899 416 178 95
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 37° 63° 1458 918 425 179 95
04-17 46° 66° 1492 941 438 184 96
04-18 60° 76° 1538 978 465 203 109
04-19 54° 72° 1580 1009 486 216 118
04-20 52° 77° 1622 1042 509 231 127
04-21 52° 71° 1661 1071 528 242 134
04-22 42° 72° 1697 1096 543 249 136
04-23 50° 78° 1738 1128 565 263 145
04-24 51° 82° 1783 1163 590 280 156
04-25 57° 72° 1826 1195 612 294 166
04-26 47° 61° 1857 1217 624 298 166
04-27 44° 68° 1891 1240 637 304 167
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 53° 82° 1937 1276 663 321 179
04-29 58° 79° 1983 1313 690 340 193
04-30 50° 72° 2022 1341 708 351 199
05-01 63° 74° 2068 1378 735 369 212
05-02 59° 70° 2110 1410 757 383 221
05-03 53° 62° 2146 1435 772 390 223
05-04 46° 50° 2172 1451 778 390 223
05-05 48° 61° 2204 1474 791 395 223
05-06 45° 71° 2240 1500 807 403 226
05-07 52° 76° 2282 1532 829 417 235
05-08 56° 71° 2324 1563 850 430 243
05-09 47° 68° 2359 1589 866 438 246
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 44° 78° 2398 1618 885 449 252
05-11 47° 81° 2441 1650 907 463 261
05-12 60° 76° 2487 1686 933 481 275
05-13 60° 78° 2534 1723 960 500 289
05-14 61° 83° 2584 1763 990 522 305
05-15 66° 89° 2639 1809 1026 550 328
05-16 64° 86° 2692 1852 1059 575 348
05-17 59° 70° 2735 1884 1081 589 358
05-18 52° 76° 2776 1916 1103 603 366
05-19 54° 77° 2820 1950 1127 619 377
05-20 60° 78° 2867 1986 1153 637 391
05-21 57° 66° 2906 2016 1173 649 397
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 52° 58° 2939 2039 1186 654 397
05-23 44° 69° 2974 2064 1201 661 399
05-24 52° 72° 3014 2093 1220 672 406
05-25 54° 65° 3051 2121 1238 682 410
05-26 50° 72° 3090 2150 1257 693 416
05-27 58° 72° 3133 2183 1280 708 426
05-28 61° 73° 3178 2218 1305 725 438
05-29 54° 72° 3219 2249 1326 738 446
05-30 59° 77° 3266 2285 1352 756 460
05-31 61° 78° 3313 2323 1380 776 474
06-01 51° 77° 3355 2354 1401 789 483
06-02 50° 83° 3399 2389 1426 806 494
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 63° 88° 3453 2432 1459 831 515
06-04 72° 85° 3509 2479 1496 860 538
06-05 68° 76° 3559 2519 1526 882 555
06-06 67° 75° 3608 2558 1555 903 571
06-07 61° 77° 3655 2595 1582 922 585
06-08 65° 80° 3706 2636 1613 945 603
06-09 62° 78° 3754 2673 1640 964 618
06-10 56° 77° 3799 2708 1665 981 630
06-11 57° 85° 3848 2747 1694 1002 645
06-12 63° 83° 3898 2788 1725 1025 663
06-13 69° 80° 3951 2830 1757 1049 683
06-14 70° 78° 4003 2872 1789 1073 701
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 67° 80° 4054 2913 1820 1096 720
06-16 69° 81° 4107 2956 1853 1121 740
06-17 70° 85° 4163 3002 1889 1149 762
06-18 73° 86° 4220 3050 1927 1179 787
06-19 69° 83° 4275 3094 1961 1205 809
06-20 65° 84° 4327 3137 1994 1230 828
06-21 72° 94° 4388 3188 2035 1263 856
06-22 76° 94° 4451 3241 2078 1298 886
06-23 75° 95° 4514 3293 2120 1332 916
06-24 76° 92° 4576 3345 2162 1366 945
06-25 75° 94° 4638 3398 2205 1401 974
06-26 75° 94° 4701 3450 2247 1435 1004
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 76° 90° 4762 3501 2288 1468 1032
06-28 74° 90° 4822 3551 2328 1500 1059
06-29 72° 83° 4878 3597 2364 1528 1081
06-30 73° 89° 4937 3646 2403 1559 1107
07-01 72° 86° 4993 3693 2440 1588 1131
07-02 67° 87° 5048 3738 2475 1615 1153
07-03 69° 90° 5106 3785 2512 1644 1177
07-04 68° 92° 5163 3833 2550 1674 1202
07-05 69° 92° 5222 3881 2588 1704 1228
07-06 73° 91° 5282 3931 2628 1736 1255
07-07 71° 83° 5337 3976 2663 1763 1277
07-08 62° 89° 5390 4020 2697 1789 1297
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 72° 87° 5448 4068 2735 1819 1322
07-10 68° 89° 5505 4114 2771 1847 1346
07-11 71° 93° 5565 4164 2811 1879 1373
07-12 76° 88° 5625 4214 2851 1911 1399
07-13 70° 87° 5681 4260 2887 1939 1423
07-14 70° 86° 5737 4307 2924 1968 1446
07-15 72° 85° 5794 4353 2960 1996 1470
07-16 73° 90° 5853 4403 3000 2028 1496
07-17 71° 86° 5910 4449 3036 2056 1520
07-18 70° 86° 5966 4495 3072 2084 1543
07-19 72° 81° 6020 4540 3107 2111 1564
07-20 73° 86° 6078 4588 3145 2141 1589
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 74° 83° 6135 4634 3181 2169 1613
07-22 69° 86° 6190 4679 3216 2196 1635
07-23 71° 90° 6248 4728 3255 2227 1660
07-24 77° 92° 6311 4780 3297 2261 1690
07-25 77° 90° 6372 4832 3339 2295 1718
07-26 76° 89° 6433 4883 3380 2328 1746
07-27 75° 89° 6493 4933 3420 2360 1773
07-28 74° 92° 6554 4984 3461 2393 1801
07-29 74° 92° 6615 5035 3502 2426 1829
07-30 73° 89° 6675 5084 3541 2457 1855
07-31 70° 80° 6727 5127 3574 2482 1875
08-01 62° 78° 6775 5165 3602 2502 1890
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 59° 77° 6821 5201 3628 2520 1903
08-03 58° 80° 6868 5238 3655 2539 1917
08-04 65° 73° 6915 5274 3681 2557 1931
08-05 64° 83° 6967 5316 3713 2581 1950
08-06 64° 86° 7020 5359 3746 2606 1969
08-07 68° 86° 7075 5405 3782 2634 1992
08-08 68° 88° 7131 5450 3817 2661 2015
08-09 69° 89° 7188 5497 3854 2690 2039
08-10 70° 89° 7245 5545 3892 2720 2063
08-11 70° 89° 7302 5592 3929 2749 2087
08-12 70° 88° 7359 5639 3966 2778 2111
08-13 69° 86° 7414 5684 4001 2805 2133
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 67° 87° 7470 5729 4036 2832 2156
08-15 68° 90° 7527 5777 4074 2862 2180
08-16 72° 93° 7587 5827 4114 2894 2207
08-17 71° 89° 7645 5875 4152 2924 2232
08-18 72° 88° 7704 5923 4190 2954 2257
08-19 74° 88° 7763 5972 4229 2985 2284
08-20 68° 80° 7815 6014 4261 3009 2302
08-21 64° 79° 7864 6053 4290 3030 2319
08-22 60° 78° 7911 6090 4317 3049 2332
08-23 60° 80° 7959 6128 4345 3069 2348
08-24 57° 76° 8003 6163 4370 3086 2359
08-25 53° 73° 8044 6194 4391 3099 2367
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 48° 74° 8083 6222 4409 3109 2373
08-27 47° 76° 8122 6252 4429 3121 2379
08-28 54° 82° 8168 6288 4455 3139 2392
08-29 56° 79° 8214 6323 4480 3156 2405
08-30 52° 80° 8258 6357 4504 3172 2416
08-31 53° 78° 8301 6391 4528 3188 2426
09-01 52° 82° 8346 6426 4553 3205 2438
09-02 52° 84° 8392 6462 4579 3223 2451
09-03 51° 82° 8437 6496 4603 3239 2463
09-04 53° 72° 8477 6527 4624 3252 2470
09-05 52° 74° 8519 6558 4645 3265 2478
09-06 50° 71° 8557 6587 4664 3276 2484
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 46° 72° 8594 6614 4681 3285 2488
09-08 41° 74° 8630 6639 4696 3292 2491
09-09 44° 78° 8669 6668 4715 3303 2497
09-10 56° 85° 8717 6706 4743 3323 2512
09-11 59° 85° 8767 6746 4773 3345 2529
09-12 57° 87° 8817 6786 4803 3367 2546
09-13 58° 86° 8866 6826 4833 3389 2562
09-14 65° 91° 8923 6872 4869 3417 2586
09-15 61° 90° 8976 6916 4903 3443 2606
09-16 60° 88° 9028 6958 4935 3467 2625
09-17 52° 88° 9076 6996 4963 3487 2640
09-18 54° 90° 9126 7035 4992 3508 2657
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 56° 88° 9176 7076 5023 3531 2674
09-20 60° 86° 9227 7117 5054 3554 2692
09-21 63° 84° 9279 7158 5085 3577 2711
09-22 65° 75° 9327 7197 5114 3598 2726
09-23 63° 80° 9376 7236 5143 3619 2742
09-24 65° 78° 9426 7275 5172 3640 2758
09-25 58° 77° 9471 7310 5197 3657 2771
09-26 51° 82° 9515 7345 5222 3674 2782
09-27 51° 85° 9561 7381 5248 3692 2795
09-28 55° 89° 9611 7421 5278 3714 2812
09-29 56° 89° 9662 7461 5308 3736 2830
09-30 59° 87° 9712 7502 5339 3759 2847
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2026Welcome to the 2026 GDD Tracking Season

Although Punxsutawney Phil saw his shadow predicting six more weeks of winter, GDDTracker will start 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. As spring turns to summer, 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 2026!


 

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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