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 Germination Prediction (GDD 50)
through Sun, Dec. 14. 2025

 
  

Lincoln, NE

        

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 11° 31° 0 0 0 0 0
02-16 2° 13° 0 0 0 0 0
02-17 -4° 8° 0 0 0 0 0
02-18 -8° 0° 0 0 0 0 0
02-19 -8° 3° 0 0 0 0 0
02-20 -15° 10° 0 0 0 0 0
02-21 -10° 23° 0 0 0 0 0
02-22 13° 40° 5 0 0 0 0
02-23 28° 60° 26 12 2 0 0
02-24 40° 68° 58 34 14 4 0
02-25 30° 65° 84 49 19 4 0
02-26 39° 59° 111 66 26 4 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 35° 61° 137 82 32 4 0
02-28 39° 62° 166 101 41 5 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 24° 41° 176 102 41 5 0
03-02 23° 59° 195 111 41 5 0
03-03 40° 59° 223 128 48 5 0
03-04 30° 56° 244 139 50 5 0
03-05 23° 37° 252 139 50 5 0
03-06 23° 43° 263 141 50 5 0
03-07 30° 39° 276 143 50 5 0
03-08 21° 56° 293 150 50 5 0
03-09 25° 68° 317 165 54 5 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 33° 82° 353 190 70 12 3
03-11 37° 58° 378 206 76 12 3
03-12 27° 74° 407 224 84 13 3
03-13 33° 78° 440 248 98 18 3
03-14 55° 73° 483 280 120 32 13
03-15 34° 47° 501 289 120 32 13
03-16 22° 56° 518 296 120 32 13
03-17 41° 84° 558 326 140 45 20
03-18 42° 72° 593 351 155 52 22
03-19 31° 51° 613 360 155 52 22
03-20 17° 47° 623 360 155 52 22
03-21 40° 58° 650 378 162 52 22
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 70° 679 397 171 53 22
03-23 45° 60° 709 417 182 55 22
03-24 36° 66° 738 436 191 56 22
03-25 38° 62° 766 454 199 56 22
03-26 33° 69° 795 473 208 57 22
03-27 46° 83° 838 505 230 71 31
03-28 65° 81° 889 546 261 94 49
03-29 40° 65° 919 567 271 97 49
03-30 35° 39° 934 572 271 97 49
03-31 34° 54° 956 584 273 97 49
04-01 43° 56° 984 601 281 97 49
04-02 44° 55° 1012 619 289 97 49
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 56° 1035 632 292 97 49
04-04 40° 51° 1058 646 295 97 49
04-05 31° 49° 1076 653 295 97 49
04-06 22° 59° 1094 662 295 97 49
04-07 34° 50° 1115 672 296 97 49
04-08 26° 64° 1138 685 299 97 49
04-09 42° 74° 1174 711 315 105 52
04-10 48° 69° 1210 737 331 113 56
04-11 35° 68° 1239 757 340 114 56
04-12 48° 81° 1282 789 363 129 65
04-13 59° 79° 1329 826 389 148 79
04-14 46° 61° 1360 848 401 151 79
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 37° 66° 1390 867 411 153 79
04-16 47° 80° 1431 899 432 167 88
04-17 62° 85° 1483 941 464 190 106
04-18 46° 60° 1514 962 475 193 106
04-19 37° 59° 1540 978 481 193 106
04-20 42° 48° 1563 991 484 193 106
04-21 37° 77° 1598 1016 499 200 108
04-22 50° 73° 1637 1045 518 211 114
04-23 50° 77° 1679 1076 540 225 123
04-24 56° 69° 1719 1107 560 237 130
04-25 47° 56° 1748 1126 569 238 130
04-26 45° 61° 1780 1147 580 242 130
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 53° 65° 1816 1174 597 250 134
04-28 63° 88° 1870 1218 631 276 155
04-29 47° 67° 1905 1243 646 283 157
04-30 47° 65° 1939 1267 660 289 158
05-01 56° 69° 1979 1297 680 301 165
05-02 50° 58° 2012 1319 693 306 165
05-03 38° 68° 2043 1340 704 309 165
05-04 42° 74° 2079 1366 720 317 168
05-05 46° 79° 2119 1397 740 329 175
05-06 48° 77° 2160 1428 761 342 183
05-07 55° 77° 2204 1461 785 358 194
05-08 55° 80° 2249 1497 810 375 206
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 51° 84° 2294 1532 835 392 219
05-10 53° 88° 2343 1571 864 413 234
05-11 57° 87° 2393 1611 894 435 252
05-12 56° 86° 2442 1649 923 456 267
05-13 58° 87° 2492 1690 953 478 285
05-14 63° 89° 2546 1734 987 504 306
05-15 62° 80° 2595 1773 1016 525 322
05-16 57° 73° 2638 1805 1039 540 331
05-17 51° 75° 2678 1836 1059 552 339
05-18 47° 79° 2720 1867 1081 566 347
05-19 57° 76° 2764 1902 1105 582 359
05-20 51° 63° 2799 1927 1120 589 361
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 46° 70° 2835 1953 1136 597 363
05-22 46° 68° 2870 1977 1151 604 365
05-23 46° 61° 2901 1999 1162 607 365
05-24 54° 73° 2943 2030 1183 621 374
05-25 54° 67° 2981 2059 1202 631 379
05-26 54° 63° 3018 2085 1219 640 383
05-27 53° 60° 3052 2110 1233 646 384
05-28 48° 67° 3088 2135 1249 654 387
05-29 53° 70° 3127 2165 1268 665 393
05-30 50° 78° 3169 2197 1290 679 402
05-31 58° 86° 3219 2237 1320 701 419
06-01 57° 85° 3268 2276 1349 722 435
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 62° 91° 3323 2320 1384 749 457
06-03 56° 78° 3368 2355 1409 766 469
06-04 49° 73° 3407 2384 1428 777 475
06-05 57° 70° 3448 2416 1449 790 483
06-06 59° 76° 3494 2451 1475 808 496
06-07 62° 78° 3542 2489 1503 828 511
06-08 57° 68° 3583 2520 1523 841 519
06-09 55° 76° 3626 2554 1547 856 529
06-10 54° 89° 3676 2593 1576 878 546
06-11 66° 93° 3733 2641 1614 907 570
06-12 63° 84° 3785 2683 1646 931 589
06-13 64° 86° 3838 2726 1679 956 609
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 66° 88° 3893 2770 1714 983 631
06-15 68° 91° 3950 2818 1751 1012 655
06-16 71° 92° 4009 2867 1790 1043 681
06-17 68° 80° 4062 2909 1823 1068 701
06-18 63° 80° 4111 2949 1852 1089 717
06-19 61° 92° 4166 2993 1887 1116 739
06-20 76° 100° 4232 3049 1933 1154 772
06-21 81° 99° 4299 3107 1980 1193 806
06-22 79° 95° 4364 3162 2025 1230 838
06-23 72° 86° 4421 3209 2062 1259 862
06-24 71° 81° 4475 3253 2096 1285 883
06-25 71° 91° 4535 3302 2135 1317 910
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 71° 86° 4591 3349 2172 1345 933
06-27 66° 89° 4647 3394 2208 1373 956
06-28 72° 91° 4706 3444 2247 1404 982
06-29 67° 80° 4758 3485 2279 1428 1001
06-30 70° 83° 4812 3530 2313 1454 1022
07-01 60° 86° 4863 3571 2344 1477 1040
07-02 67° 92° 4921 3619 2382 1507 1065
07-03 71° 92° 4980 3668 2421 1538 1091
07-04 72° 88° 5038 3716 2459 1568 1116
07-05 73° 89° 5097 3765 2498 1599 1142
07-06 69° 85° 5153 3810 2533 1627 1165
07-07 67° 88° 5208 3856 2569 1654 1187
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 65° 87° 5262 3900 2603 1680 1208
07-09 68° 90° 5319 3947 2640 1709 1232
07-10 71° 91° 5378 3996 2679 1740 1258
07-11 68° 80° 5430 4037 2711 1764 1277
07-12 67° 78° 5480 4078 2741 1786 1294
07-13 58° 85° 5529 4117 2770 1807 1310
07-14 66° 91° 5586 4163 2807 1836 1334
07-15 68° 92° 5644 4212 2845 1866 1359
07-16 65° 79° 5694 4252 2875 1888 1376
07-17 61° 75° 5741 4288 2901 1907 1390
07-18 65° 84° 5793 4330 2934 1931 1409
07-19 73° 90° 5853 4380 2973 1963 1436
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 71° 89° 5911 4429 3012 1993 1461
07-21 71° 84° 5966 4474 3047 2020 1483
07-22 70° 86° 6023 4520 3083 2049 1507
07-23 76° 92° 6085 4572 3126 2083 1536
07-24 69° 81° 6138 4615 3159 2108 1556
07-25 69° 80° 6190 4658 3191 2132 1575
07-26 71° 88° 6248 4705 3229 2162 1600
07-27 73° 94° 6309 4757 3270 2195 1628
07-28 72° 94° 6371 4808 3312 2229 1657
07-29 76° 95° 6435 4862 3355 2265 1688
07-30 68° 85° 6489 4907 3390 2291 1709
07-31 68° 77° 6540 4947 3421 2314 1727
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 61° 74° 6585 4983 3446 2331 1739
08-02 57° 76° 6630 5017 3471 2348 1751
08-03 63° 69° 6674 5052 3495 2364 1762
08-04 61° 78° 6722 5089 3522 2384 1777
08-05 64° 83° 6773 5131 3554 2407 1795
08-06 66° 86° 6827 5175 3588 2433 1816
08-07 72° 88° 6886 5223 3626 2464 1842
08-08 75° 93° 6948 5275 3669 2498 1871
08-09 73° 87° 7006 5323 3707 2528 1896
08-10 68° 83° 7059 5367 3740 2553 1916
08-11 67° 78° 7110 5407 3771 2576 1934
08-12 64° 84° 7162 5450 3803 2600 1953
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 63° 86° 7215 5492 3836 2625 1973
08-14 70° 89° 7273 5540 3874 2655 1998
08-15 75° 93° 7335 5592 3916 2689 2027
08-16 77° 95° 7399 5646 3960 2725 2058
08-17 75° 92° 7461 5698 4002 2759 2087
08-18 71° 88° 7518 5746 4039 2788 2111
08-19 71° 89° 7577 5794 4078 2819 2137
08-20 69° 89° 7634 5841 4115 2848 2161
08-21 67° 89° 7690 5887 4151 2876 2184
08-22 66° 88° 7745 5933 4186 2903 2206
08-23 63° 77° 7793 5970 4214 2923 2221
08-24 58° 74° 7837 6004 4238 2939 2232
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 52° 74° 7877 6035 4258 2951 2239
08-26 53° 78° 7921 6068 4282 2967 2250
08-27 57° 79° 7967 6104 4308 2985 2263
08-28 60° 76° 8013 6140 4334 3003 2276
08-29 59° 80° 8060 6178 4361 3022 2290
08-30 64° 71° 8105 6213 4386 3039 2302
08-31 63° 68° 8149 6247 4410 3055 2313
09-01 60° 66° 8190 6278 4431 3068 2321
09-02 58° 75° 8235 6313 4456 3085 2333
09-03 56° 71° 8277 6344 4478 3099 2342
09-04 47° 72° 8314 6371 4495 3108 2346
09-05 55° 67° 8352 6400 4513 3118 2351
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 45° 70° 8388 6425 4529 3126 2354
09-07 46° 78° 8428 6455 4549 3138 2361
09-08 57° 71° 8470 6488 4571 3152 2370
09-09 63° 78° 8518 6526 4599 3172 2385
09-10 60° 82° 8568 6565 4629 3194 2402
09-11 63° 87° 8621 6608 4662 3219 2422
09-12 72° 91° 8681 6658 4701 3251 2449
09-13 68° 94° 8739 6707 4740 3281 2474
09-14 69° 87° 8795 6753 4776 3309 2497
09-15 63° 89° 8849 6797 4810 3335 2518
09-16 67° 91° 8906 6844 4847 3364 2542
09-17 66° 77° 8956 6884 4877 3386 2559
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 61° 72° 9001 6918 4902 3403 2571
09-19 56° 73° 9043 6951 4924 3417 2580
09-20 61° 75° 9089 6987 4950 3435 2593
09-21 56° 80° 9136 7023 4977 3454 2607
09-22 60° 88° 9188 7066 5009 3478 2626
09-23 63° 76° 9235 7103 5036 3497 2640
09-24 58° 78° 9281 7139 5062 3515 2653
09-25 53° 82° 9327 7175 5088 3533 2666
09-26 54° 85° 9375 7213 5116 3553 2681
09-27 58° 81° 9423 7250 5144 3573 2696
09-28 49° 87° 9469 7286 5170 3591 2709
09-29 57° 86° 9519 7326 5199 3613 2726
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 61° 81° 9568 7365 5229 3634 2742
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 22° 41° 10 0 0 0 0
02-16 12° 33° 10 0 0 0 0
02-17 10° 39° 13 0 0 0 0
02-18 24° 50° 28 5 0 0 0
02-19 25° 58° 47 15 0 0 0
02-20 25° 69° 72 30 5 0 0
02-21 33° 70° 102 49 15 1 0
02-22 41° 63° 132 70 25 4 0
02-23 33° 61° 157 85 30 4 0
02-24 23° 66° 180 97 33 4 0
02-25 29° 67° 206 113 39 4 0
02-26 36° 80° 242 139 55 12 3
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 17° 52° 254 142 55 12 3
02-28 10° 38° 257 142 55 12 3
02-29 27° 60° 278 154 56 12 3
03-01 34° 55° 301 166 59 12 3
03-02 37° 70° 332 188 70 16 3
03-03 43° 70° 367 212 85 22 5
03-04 39° 53° 391 226 89 22 5
03-05 23° 57° 408 234 89 22 5
03-06 25° 56° 427 243 89 22 5
03-07 35° 55° 450 256 92 22 5
03-08 29° 45° 465 261 92 22 5
03-09 23° 53° 481 266 92 22 5
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 22° 68° 504 279 95 22 5
03-11 41° 75° 540 305 111 30 8
03-12 43° 69° 574 330 125 37 9
03-13 37° 72° 607 352 137 41 9
03-14 47° 59° 638 373 148 44 9
03-15 36° 55° 661 386 152 44 9
03-16 41° 58° 688 403 159 44 9
03-17 26° 39° 699 404 159 44 9
03-18 21° 42° 708 404 159 44 9
03-19 33° 66° 736 422 166 44 9
03-20 35° 47° 755 431 166 44 9
03-21 31° 59° 777 443 169 44 9
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 32° 47° 795 451 169 44 9
03-23 26° 36° 804 451 169 44 9
03-24 32° 50° 823 460 169 44 9
03-25 31° 48° 840 467 169 44 9
03-26 26° 33° 848 467 169 44 9
03-27 18° 46° 858 467 169 44 9
03-28 32° 69° 887 486 178 45 9
03-29 49° 69° 924 513 195 54 14
03-30 35° 59° 949 528 200 54 14
03-31 39° 58° 975 544 206 54 14
04-01 42° 50° 999 558 210 54 14
04-02 38° 57° 1024 574 216 54 14
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 36° 54° 1048 587 219 54 14
04-04 30° 61° 1071 600 222 54 14
04-05 29° 64° 1095 615 227 54 14
04-06 42° 68° 1129 638 240 59 14
04-07 42° 59° 1157 657 249 60 14
04-08 36° 66° 1186 676 258 61 14
04-09 33° 68° 1215 694 266 61 14
04-10 41° 72° 1249 719 280 68 15
04-11 42° 61° 1279 738 290 69 15
04-12 35° 68° 1309 758 300 71 15
04-13 49° 86° 1354 794 326 89 28
04-14 52° 87° 1402 831 353 108 43
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 56° 77° 1446 866 378 125 54
04-16 65° 71° 1492 902 403 143 67
04-17 51° 68° 1530 929 421 152 72
04-18 43° 57° 1558 948 429 153 72
04-19 36° 56° 1583 962 434 153 72
04-20 32° 51° 1602 972 434 153 72
04-21 29° 52° 1621 980 434 153 72
04-22 43° 77° 1659 1009 452 163 77
04-23 53° 68° 1698 1037 471 174 83
04-24 38° 70° 1730 1059 483 178 83
04-25 52° 60° 1764 1084 497 184 84
04-26 53° 72° 1804 1114 517 196 91
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 52° 67° 1842 1141 535 205 95
04-28 54° 66° 1879 1169 552 215 100
04-29 42° 72° 1915 1194 568 222 102
04-30 53° 82° 1960 1229 593 240 115
05-01 48° 67° 1995 1255 608 247 117
05-02 48° 65° 2030 1279 623 254 119
05-03 42° 73° 2065 1305 638 261 121
05-04 47° 66° 2100 1329 653 268 123
05-05 41° 65° 2131 1350 664 271 123
05-06 53° 70° 2170 1380 683 282 129
05-07 50° 75° 2211 1410 704 295 137
05-08 57° 76° 2256 1445 729 311 148
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 49° 70° 2293 1473 746 321 153
05-10 49° 77° 2334 1504 767 334 161
05-11 47° 81° 2376 1535 789 348 170
05-12 59° 79° 2423 1572 816 366 183
05-13 57° 68° 2464 1603 836 379 191
05-14 47° 78° 2504 1633 857 392 199
05-15 57° 79° 2549 1669 882 409 211
05-16 54° 78° 2593 1703 906 425 222
05-17 56° 85° 2642 1741 935 446 238
05-18 66° 82° 2694 1783 967 470 257
05-19 54° 70° 2734 1813 987 482 264
05-20 57° 84° 2782 1852 1015 502 279
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 58° 72° 2825 1885 1038 517 289
05-22 52° 74° 2866 1916 1059 530 297
05-23 54° 81° 2911 1951 1084 547 309
05-24 59° 75° 2956 1986 1109 564 321
05-25 52° 80° 3000 2020 1133 580 332
05-26 60° 80° 3048 2058 1161 600 347
05-27 58° 79° 3095 2094 1188 619 361
05-28 52° 80° 3139 2128 1212 635 372
05-29 54° 80° 3184 2164 1237 652 384
05-30 64° 77° 3233 2202 1266 673 400
05-31 61° 73° 3278 2237 1290 689 411
06-01 62° 77° 3325 2274 1318 709 426
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 66° 82° 3377 2316 1350 733 445
06-03 61° 82° 3427 2356 1379 754 461
06-04 64° 80° 3477 2396 1409 776 478
06-05 52° 89° 3525 2434 1438 797 494
06-06 60° 83° 3574 2474 1467 818 510
06-07 58° 89° 3626 2515 1499 841 528
06-08 63° 77° 3674 2553 1527 861 543
06-09 59° 83° 3723 2592 1556 882 559
06-10 55° 83° 3770 2629 1583 902 574
06-11 65° 89° 3825 2675 1618 929 596
06-12 68° 92° 3883 2723 1656 959 621
06-13 74° 90° 3943 2772 1696 991 648
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 65° 89° 3998 2818 1731 1018 670
06-15 66° 83° 4051 2860 1764 1042 689
06-16 69° 90° 4108 2908 1801 1072 714
06-17 68° 90° 4165 2955 1838 1101 738
06-18 67° 87° 4220 2999 1873 1128 760
06-19 64° 73° 4267 3036 1900 1146 773
06-20 66° 87° 4321 3080 1934 1173 795
06-21 72° 89° 4380 3129 1973 1203 820
06-22 74° 89° 4439 3179 2012 1235 847
06-23 64° 91° 4494 3224 2047 1262 869
06-24 71° 100° 4558 3277 2091 1298 900
06-25 76° 97° 4623 3332 2135 1334 931
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 67° 87° 4678 3377 2170 1361 953
06-27 68° 79° 4729 3418 2202 1385 972
06-28 72° 89° 4787 3467 2240 1415 997
06-29 67° 80° 4839 3508 2272 1439 1016
06-30 56° 77° 4884 3543 2297 1455 1027
07-01 61° 76° 4930 3579 2323 1474 1041
07-02 71° 80° 4983 3623 2356 1499 1061
07-03 60° 81° 5032 3661 2385 1520 1077
07-04 65° 81° 5083 3702 2416 1543 1095
07-05 61° 80° 5132 3741 2444 1563 1110
07-06 61° 84° 5182 3781 2475 1586 1128
07-07 60° 79° 5230 3819 2503 1606 1143
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 58° 81° 5278 3857 2531 1626 1158
07-09 62° 85° 5329 3899 2562 1649 1176
07-10 65° 87° 5383 3943 2596 1675 1197
07-11 61° 84° 5434 3983 2627 1698 1215
07-12 68° 87° 5490 4029 2662 1725 1237
07-13 73° 90° 5549 4078 2702 1757 1264
07-14 70° 94° 5609 4128 2742 1789 1291
07-15 75° 95° 5672 4181 2785 1824 1321
07-16 71° 81° 5726 4225 2819 1850 1342
07-17 64° 82° 5777 4266 2850 1873 1360
07-18 59° 81° 5825 4304 2878 1893 1375
07-19 63° 80° 5874 4344 2907 1914 1391
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 65° 72° 5921 4381 2934 1933 1405
07-21 61° 81° 5971 4420 2964 1954 1421
07-22 63° 82° 6021 4461 2994 1977 1439
07-23 63° 85° 6073 4502 3026 2001 1458
07-24 65° 90° 6129 4548 3061 2028 1480
07-25 67° 92° 6186 4595 3099 2057 1504
07-26 70° 91° 6244 4644 3137 2088 1530
07-27 70° 89° 6302 4692 3175 2118 1555
07-28 69° 88° 6359 4738 3212 2146 1578
07-29 70° 94° 6419 4788 3251 2178 1605
07-30 72° 93° 6479 4839 3292 2211 1633
07-31 67° 97° 6539 4889 3332 2243 1660
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 65° 88° 6594 4933 3367 2270 1682
08-02 66° 91° 6650 4980 3403 2298 1705
08-03 67° 92° 6708 5027 3441 2328 1730
08-04 70° 96° 6769 5078 3482 2360 1757
08-05 70° 98° 6831 5130 3524 2394 1786
08-06 64° 77° 6879 5169 3552 2415 1802
08-07 57° 85° 6928 5207 3581 2436 1818
08-08 60° 75° 6974 5243 3607 2453 1830
08-09 54° 73° 7015 5275 3628 2467 1839
08-10 55° 75° 7058 5307 3651 2482 1849
08-11 57° 72° 7100 5340 3673 2496 1858
08-12 63° 74° 7147 5377 3700 2515 1872
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 64° 77° 7196 5415 3729 2536 1888
08-14 68° 85° 7250 5460 3763 2562 1909
08-15 67° 86° 7305 5504 3798 2589 1931
08-16 66° 89° 7360 5550 3833 2616 1953
08-17 64° 82° 7412 5591 3865 2640 1972
08-18 64° 70° 7457 5626 3890 2656 1983
08-19 63° 83° 7508 5668 3921 2680 2002
08-20 63° 78° 7557 5706 3950 2700 2017
08-21 65° 80° 7607 5747 3980 2723 2035
08-22 62° 79° 7655 5785 4008 2743 2050
08-23 64° 85° 7708 5827 4041 2768 2070
08-24 70° 93° 7767 5877 4080 2799 2096
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 74° 101° 7833 5932 4126 2837 2129
08-26 73° 99° 7897 5986 4170 2873 2160
08-27 70° 91° 7955 6035 4208 2903 2185
08-28 69° 95° 8015 6085 4248 2935 2212
08-29 70° 96° 8076 6136 4289 2968 2240
08-30 65° 81° 8127 6177 4320 2991 2258
08-31 53° 87° 8175 6214 4348 3011 2273
09-01 62° 80° 8224 6253 4377 3032 2289
09-02 51° 78° 8267 6286 4400 3046 2298
09-03 54° 83° 8314 6323 4426 3065 2312
09-04 58° 90° 8366 6365 4459 3089 2331
09-05 63° 79° 8415 6404 4487 3110 2347
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 54° 72° 8455 6435 4508 3123 2355
09-07 45° 77° 8494 6463 4527 3134 2361
09-08 51° 82° 8538 6498 4551 3150 2372
09-09 56° 91° 8590 6539 4582 3173 2390
09-10 66° 92° 8647 6586 4619 3202 2414
09-11 59° 90° 8699 6628 4652 3226 2433
09-12 60° 87° 8750 6669 4683 3250 2452
09-13 59° 88° 8801 6710 4714 3273 2470
09-14 60° 81° 8850 6749 4743 3294 2486
09-15 66° 91° 8906 6796 4779 3322 2509
09-16 68° 86° 8962 6841 4814 3349 2531
09-17 70° 88° 9018 6888 4851 3378 2555
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 70° 91° 9077 6936 4890 3409 2581
09-19 71° 90° 9136 6985 4928 3439 2606
09-20 55° 94° 9188 7028 4961 3464 2626
09-21 70° 89° 9246 7075 4998 3493 2650
09-22 57° 70° 9287 7106 5020 3507 2659
09-23 54° 75° 9329 7139 5042 3521 2668
09-24 55° 79° 9374 7173 5067 3538 2680
09-25 48° 82° 9417 7207 5090 3553 2690
09-26 50° 84° 9462 7241 5115 3570 2702
09-27 51° 85° 9508 7277 5141 3587 2714
09-28 53° 89° 9557 7316 5170 3609 2731
09-29 52° 87° 9605 7354 5198 3629 2746
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 55° 91° 9656 7395 5229 3651 2763

 

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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