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 Fri, Apr. 10. 2026

 

GDD Total: 760 (Base 32) through Fri, Apr. 10, 2026

  

Bennington, NE

        

Forecast »

“Flashback” to 2025

4/4

4/5

4/6

4/7

4/8

4/9

4/10

4/11

4/12

4/13

4/14

4/15

4/16

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

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 29° 66° 26 16 6 0 0
02-16 41° 66° 57 37 17 3 0
02-17 44° 71° 93 63 33 11 3
02-18 40° 59° 120 80 40 11 3
02-19 19° 36° 126 80 40 11 3
02-20 12° 23° 126 80 40 11 3
02-21 14° 29° 126 80 40 11 3
02-22 7° 24° 126 80 40 11 3
02-23 2° 23° 126 80 40 11 3
02-24 24° 50° 141 85 40 11 3
02-25 30° 39° 153 87 40 11 3
02-26 22° 63° 174 98 41 11 3
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 32° 68° 202 116 49 11 3
02-28 26° 42° 214 119 49 11 3
03-01 21° 38° 222 119 49 11 3
03-02 26° 48° 237 124 49 11 3
03-03 37° 44° 255 132 49 11 3
03-04 39° 50° 278 145 52 11 3
03-05 43° 58° 307 164 61 12 3
03-06 32° 65° 333 180 67 12 3
03-07 30° 52° 352 189 67 12 3
03-08 39° 75° 387 214 82 19 4
03-09 45° 77° 426 243 101 30 11
03-10 36° 60° 452 259 107 30 11
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 31° 47° 469 266 107 30 11
03-12 25° 68° 494 281 112 30 11
03-13 33° 57° 517 294 115 30 11
03-14 33° 59° 541 308 119 30 11
03-15 15° 52° 553 310 119 30 11
03-16 6° 23° 553 310 119 30 11
03-17 10° 34° 553 310 119 30 11
03-18 26° 76° 582 329 128 31 11
03-19 40° 79° 620 356 146 41 15
03-20 45° 86° 663 389 169 56 25
03-21 49° 93° 712 429 198 77 42
03-22 39° 69° 744 451 210 81 42
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 23° 50° 758 455 210 81 42
03-24 32° 64° 784 471 216 81 42
03-25 50° 81° 828 505 240 97 52
03-26 40° 68° 860 527 252 101 52
03-27 27° 51° 877 533 252 101 52
03-28 24° 62° 898 545 253 101 52
03-29 46° 76° 937 574 272 112 59
03-30 45° 88° 982 609 297 129 70
03-31 47° 75° 1021 638 316 140 76
04-01 36° 49° 1041 648 317 140 76
04-02 42° 45° 1063 660 318 140 76
04-03 37° 41° 1081 667 318 140 76
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 36° 47° 1100 677 318 140 76
04-05 32° 65° 1126 693 325 140 76
04-06 40° 49° 1149 705 327 140 76
04-07 30° 44° 1164 711 327 140 76
04-08 46° 72° 1201 737 344 149 80
04-09 39° 48° 1222 749 345 149 80
04-10 32° 54° 1243 760 346 149 80
04-11 43° 67° 1276 783 360 154 80
04-12 61° 75° 1322 819 386 172 93
04-13 58° 81° 1370 857 413 192 108
04-14 60° 82° 1419 896 442 213 124
04-15 52° 75° 1461 927 464 227 133
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 51° 80° 1504 961 488 242 143
04-17 53° 70° 1544 991 507 254 150
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 13° 29° 0 0 0 0 0
02-16 1° 11° 0 0 0 0 0
02-17 -5° 4° 0 0 0 0 0
02-18 -10° 1° 0 0 0 0 0
02-19 -9° 2° 0 0 0 0 0
02-20 -13° 9° 0 0 0 0 0
02-21 -12° 21° 0 0 0 0 0
02-22 9° 37° 1 0 0 0 0
02-23 18° 50° 14 2 0 0 0
02-24 35° 59° 39 17 5 0 0
02-25 30° 58° 61 30 7 0 0
02-26 39° 57° 87 46 13 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 58° 112 60 18 0 0
02-28 38° 60° 139 77 25 0 0
03-01 23° 37° 147 77 25 0 0
03-02 24° 55° 164 85 25 0 0
03-03 36° 58° 189 100 30 0 0
03-04 29° 56° 210 110 31 0 0
03-05 22° 33° 215 110 31 0 0
03-06 22° 41° 225 110 31 0 0
03-07 30° 38° 237 113 31 0 0
03-08 21° 53° 252 118 31 0 0
03-09 28° 66° 277 133 36 0 0
03-10 33° 80° 312 158 51 7 2
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 33° 54° 334 169 52 7 2
03-12 29° 69° 361 186 59 7 2
03-13 36° 77° 395 211 74 14 4
03-14 50° 72° 434 240 93 25 10
03-15 32° 48° 453 248 93 25 10
03-16 25° 53° 469 255 93 25 10
03-17 38° 81° 507 282 110 34 14
03-18 43° 70° 541 307 125 40 15
03-19 31° 47° 558 314 125 40 15
03-20 19° 43° 567 314 125 40 15
03-21 35° 50° 588 324 125 40 15
03-22 21° 54° 603 330 125 40 15
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 41° 54° 629 346 131 40 15
03-24 31° 59° 652 359 134 40 15
03-25 35° 58° 677 374 139 40 15
03-26 33° 64° 703 390 145 40 15
03-27 48° 78° 744 421 166 53 23
03-28 58° 82° 793 459 195 73 38
03-29 41° 67° 824 481 206 77 38
03-30 34° 39° 839 486 206 77 38
03-31 33° 51° 859 496 206 77 38
04-01 38° 52° 883 509 210 77 38
04-02 44° 52° 908 525 216 77 38
04-03 34° 53° 930 536 217 77 38
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 39° 50° 952 549 219 77 38
04-05 30° 48° 969 556 219 77 38
04-06 25° 59° 989 565 219 77 38
04-07 32° 48° 1007 573 219 77 38
04-08 27° 59° 1028 585 221 77 38
04-09 42° 73° 1064 610 236 85 41
04-10 47° 67° 1099 636 252 92 44
04-11 35° 65° 1127 654 260 93 44
04-12 45° 78° 1167 684 280 105 50
04-13 59° 77° 1213 720 306 123 63
04-14 45° 61° 1244 741 317 126 63
04-15 36° 65° 1272 759 325 126 63
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 44° 79° 1312 789 345 137 70
04-17 59° 81° 1360 827 373 157 85
04-18 46° 56° 1389 846 382 158 85
04-19 36° 58° 1414 861 387 158 85
04-20 43° 47° 1437 874 390 158 85
04-21 39° 75° 1472 899 405 165 87
04-22 50° 71° 1510 927 423 175 92
04-23 50° 75° 1551 958 444 188 100
04-24 55° 64° 1589 985 461 198 105
04-25 46° 55° 1617 1004 470 199 105
04-26 45° 63° 1649 1026 482 203 105
04-27 53° 63° 1685 1052 498 211 108
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 60° 87° 1737 1094 530 234 126
04-29 45° 66° 1771 1118 544 240 127
04-30 46° 64° 1804 1141 557 245 127
05-01 55° 66° 1843 1169 575 256 133
05-02 49° 62° 1876 1193 589 261 133
05-03 39° 67° 1907 1214 600 264 133
05-04 43° 74° 1943 1240 616 273 137
05-05 48° 77° 1984 1271 637 285 144
05-06 50° 77° 2026 1302 658 299 153
05-07 56° 77° 2070 1337 683 315 165
05-08 56° 79° 2115 1372 708 333 177
05-09 50° 83° 2160 1406 732 349 188
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 55° 87° 2209 1445 761 370 204
05-11 59° 86° 2259 1486 792 393 222
05-12 55° 85° 2307 1524 820 413 237
05-13 57° 87° 2357 1564 850 434 254
05-14 61° 88° 2409 1606 882 459 273
05-15 64° 78° 2458 1645 911 480 289
05-16 56° 70° 2499 1676 932 492 296
05-17 50° 70° 2537 1704 950 502 301
05-18 42° 77° 2575 1731 967 512 306
05-19 55° 68° 2614 1761 987 524 313
05-20 52° 61° 2648 1785 1001 530 314
05-21 46° 65° 2682 1808 1014 535 314
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 64° 2713 1830 1026 539 314
05-23 45° 64° 2746 1853 1039 543 314
05-24 53° 67° 2784 1880 1056 553 319
05-25 53° 68° 2823 1909 1075 564 325
05-26 54° 66° 2861 1937 1093 574 330
05-27 53° 60° 2895 1962 1108 580 331
05-28 52° 67° 2933 1989 1125 590 336
05-29 49° 70° 2970 2017 1143 599 340
05-30 51° 77° 3012 2049 1165 614 350
05-31 56° 85° 3061 2087 1193 634 365
06-01 57° 86° 3110 2127 1223 655 381
06-02 63° 90° 3165 2171 1257 682 403
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 56° 79° 3210 2206 1282 699 415
06-04 49° 75° 3249 2236 1302 711 422
06-05 58° 71° 3292 2269 1325 725 431
06-06 60° 75° 3338 2304 1350 743 444
06-07 62° 79° 3387 2343 1379 764 460
06-08 57° 69° 3428 2374 1400 777 468
06-09 56° 69° 3468 2405 1421 790 476
06-10 53° 87° 3516 2443 1449 810 491
06-11 64° 92° 3572 2489 1485 838 514
06-12 66° 84° 3625 2532 1518 862 533
06-13 64° 86° 3678 2575 1551 888 554
06-14 67° 89° 3735 2621 1587 916 577
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 70° 90° 3793 2669 1625 946 602
06-16 68° 91° 3850 2717 1663 975 626
06-17 67° 82° 3903 2759 1695 1000 646
06-18 62° 79° 3951 2798 1724 1021 662
06-19 60° 91° 4005 2842 1758 1046 682
06-20 74° 99° 4070 2896 1802 1083 714
06-21 80° 98° 4137 2954 1850 1122 748
06-22 79° 95° 4202 3008 1894 1159 780
06-23 72° 84° 4258 3055 1931 1187 803
06-24 71° 81° 4312 3099 1965 1213 824
06-25 70° 89° 4370 3146 2002 1243 849
06-26 69° 85° 4425 3191 2037 1270 871
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 63° 87° 4478 3234 2070 1295 891
06-28 72° 91° 4537 3284 2110 1326 917
06-29 67° 81° 4589 3326 2142 1350 936
06-30 70° 84° 4644 3371 2177 1378 959
07-01 62° 85° 4696 3413 2209 1402 978
07-02 68° 88° 4752 3459 2245 1430 1001
07-03 71° 91° 4811 3508 2284 1461 1027
07-04 72° 88° 4870 3556 2322 1491 1052
07-05 73° 88° 4928 3605 2361 1522 1078
07-06 69° 83° 4983 3649 2395 1548 1099
07-07 66° 86° 5037 3694 2430 1574 1120
07-08 65° 86° 5090 3737 2463 1600 1141
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 68° 88° 5147 3783 2499 1628 1164
07-10 68° 87° 5202 3829 2535 1655 1186
07-11 67° 80° 5253 3870 2566 1679 1205
07-12 66° 77° 5303 3910 2596 1700 1221
07-13 58° 84° 5352 3949 2625 1721 1237
07-14 67° 90° 5408 3995 2661 1749 1260
07-15 70° 90° 5466 4043 2699 1779 1285
07-16 66° 79° 5517 4084 2730 1802 1303
07-17 60° 74° 5562 4119 2755 1820 1316
07-18 66° 83° 5615 4162 2788 1844 1335
07-19 74° 89° 5674 4211 2827 1876 1362
07-20 70° 89° 5732 4259 2865 1906 1387
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 73° 86° 5789 4306 2902 1935 1411
07-22 71° 88° 5847 4354 2940 1964 1435
07-23 76° 92° 5909 4406 2982 1998 1464
07-24 69° 83° 5963 4450 3016 2024 1485
07-25 71° 84° 6019 4495 3051 2052 1508
07-26 73° 88° 6077 4544 3090 2082 1533
07-27 74° 94° 6139 4596 3132 2116 1562
07-28 70° 94° 6199 4646 3172 2148 1589
07-29 74° 95° 6262 4698 3214 2183 1619
07-30 68° 84° 6315 4742 3248 2209 1640
07-31 67° 78° 6366 4783 3279 2231 1657
08-01 63° 74° 6412 4819 3305 2250 1671
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 75° 6456 4853 3329 2266 1682
08-03 63° 71° 6501 4888 3354 2283 1694
08-04 61° 73° 6546 4923 3379 2300 1706
08-05 64° 81° 6597 4964 3410 2322 1723
08-06 67° 86° 6651 5008 3444 2349 1745
08-07 71° 85° 6708 5054 3480 2377 1768
08-08 74° 90° 6768 5105 3521 2409 1795
08-09 72° 84° 6824 5151 3557 2437 1818
08-10 70° 81° 6878 5194 3590 2463 1839
08-11 65° 79° 6928 5234 3620 2485 1856
08-12 66° 84° 6981 5277 3653 2510 1876
08-13 64° 85° 7033 5320 3686 2534 1895
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 71° 87° 7090 5367 3723 2564 1920
08-15 75° 92° 7152 5418 3764 2597 1948
08-16 77° 94° 7215 5472 3808 2632 1978
08-17 76° 92° 7277 5524 3850 2666 2007
08-18 71° 86° 7334 5570 3886 2695 2031
08-19 70° 89° 7391 5618 3924 2725 2056
08-20 69° 89° 7449 5665 3961 2754 2080
08-21 67° 88° 7504 5711 3997 2782 2103
08-22 67° 87° 7559 5756 4032 2808 2124
08-23 63° 75° 7606 5793 4059 2827 2138
08-24 58° 74° 7650 5827 4083 2844 2150
08-25 51° 72° 7690 5857 4103 2855 2156
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 54° 76° 7733 5890 4126 2870 2166
08-27 59° 80° 7781 5928 4154 2890 2181
08-28 58° 79° 7828 5964 4180 2909 2195
08-29 59° 81° 7876 6003 4209 2929 2210
08-30 65° 76° 7924 6041 4237 2949 2225
08-31 64° 70° 7969 6076 4262 2966 2237
09-01 61° 67° 8011 6108 4284 2980 2246
09-02 53° 77° 8054 6141 4307 2995 2256
09-03 56° 71° 8095 6172 4328 3008 2264
09-04 47° 71° 8132 6199 4345 3017 2268
09-05 53° 67° 8170 6226 4362 3027 2273
09-06 45° 68° 8204 6251 4377 3034 2275
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 45° 77° 8243 6280 4396 3044 2280
09-08 57° 76° 8287 6314 4420 3061 2292
09-09 62° 76° 8335 6351 4447 3080 2306
09-10 60° 84° 8385 6391 4477 3102 2323
09-11 62° 88° 8438 6435 4511 3127 2343
09-12 72° 91° 8498 6484 4550 3159 2370
09-13 69° 96° 8558 6535 4591 3191 2397
09-14 70° 87° 8615 6581 4627 3220 2421
09-15 64° 90° 8669 6626 4662 3247 2443
09-16 68° 90° 8727 6673 4699 3276 2467
09-17 65° 76° 8775 6712 4728 3297 2483
09-18 61° 76° 8822 6748 4754 3315 2496
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 59° 70° 8864 6781 4777 3329 2505
09-20 61° 77° 8911 6818 4804 3348 2519
09-21 57° 80° 8958 6855 4831 3367 2533
09-22 61° 88° 9011 6897 4863 3392 2553
09-23 63° 74° 9058 6934 4890 3411 2567
09-24 57° 79° 9104 6970 4916 3429 2580
09-25 53° 82° 9150 7006 4942 3447 2593
09-26 56° 86° 9199 7046 4972 3468 2609
09-27 61° 81° 9248 7085 5001 3489 2625
09-28 49° 87° 9294 7121 5027 3508 2639
09-29 59° 88° 9346 7162 5058 3531 2657
09-30 61° 82° 9395 7202 5088 3553 2674
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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