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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
forecast for Fri, Apr. 3. 2026

 

Forecasted GDD Total: 772 (Base 32) through Fri, Apr. 3, 2026

  

Noblesville, IN

        

Forecast »

“Flashback” to 2025

3/26

3/27

3/28

3/29

3/30

3/31

4/1

4/2

4/3

4/4

4/5

4/6

4/7

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 39° 54° 25 15 5 0 0
02-16 33° 57° 48 28 8 0 0
02-17 37° 56° 72 42 12 0 0
02-18 46° 68° 107 67 27 7 2
02-19 45° 63° 139 89 39 11 2
02-20 31° 53° 159 99 39 11 2
02-21 25° 33° 166 99 39 11 2
02-22 20° 28° 168 99 39 11 2
02-23 14° 26° 168 99 39 11 2
02-24 15° 38° 172 99 39 11 2
02-25 32° 49° 191 108 39 11 2
02-26 29° 46° 207 114 39 11 2
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 61° 233 130 45 11 2
02-28 35° 56° 256 143 48 11 2
03-01 29° 37° 267 144 48 11 2
03-02 24° 39° 276 144 48 11 2
03-03 35° 42° 293 150 48 11 2
03-04 40° 53° 317 165 53 11 2
03-05 52° 62° 352 190 68 18 4
03-06 58° 76° 397 224 92 35 15
03-07 43° 65° 429 247 105 39 15
03-08 37° 58° 455 263 111 39 15
03-09 43° 70° 490 287 125 46 17
03-10 63° 70° 535 322 150 63 29
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 35° 69° 565 343 161 65 29
03-12 30° 47° 582 349 161 65 29
03-13 40° 55° 607 364 166 65 29
03-14 32° 45° 624 371 166 65 29
03-15 40° 72° 658 395 181 72 31
03-16 21° 57° 675 402 181 72 31
03-17 14° 24° 675 402 181 72 31
03-18 20° 46° 686 403 181 72 31
03-19 37° 68° 717 424 191 74 31
03-20 48° 77° 757 455 212 87 38
03-21 42° 70° 791 478 226 93 39
03-22 47° 83° 834 512 249 108 49
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 32° 44° 850 517 249 108 49
03-24 25° 53° 867 524 249 108 49
03-25 39° 69° 899 546 261 112 49
03-26 54° 83° 945 582 287 130 62
03-27 34° 51° 966 593 288 130 62
03-28 29° 47° 982 599 288 130 62
03-29 36° 64° 1010 617 296 130 62
03-30 53° 75° 1052 649 318 144 72
03-31 62° 76° 1099 687 345 163 86
04-01 40° 67° 1131 708 357 167 86
04-02 41° 77° 1168 735 374 176 90
04-03 62° 76° 1215 772 401 195 104
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 62° 71° 1259 806 425 211 115
04-05 38° 50° 1281 818 427 211 115
04-06 35° 57° 1305 832 431 211 115
04-07 36° 50° 1326 843 432 211 115
04-08 31° 58° 1349 856 435 211 115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 32° 40° 14 4 0 0 0
02-16 20° 34° 19 4 0 0 0
02-17 5° 16° 19 4 0 0 0
02-18 4° 15° 19 4 0 0 0
02-19 12° 19° 19 4 0 0 0
02-20 4° 20° 19 4 0 0 0
02-21 12° 27° 19 4 0 0 0
02-22 10° 32° 19 4 0 0 0
02-23 22° 43° 29 5 0 0 0
02-24 33° 51° 49 15 0 0 0
02-25 36° 57° 74 30 5 0 0
02-26 31° 57° 96 41 7 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 52° 118 54 9 0 0
02-28 32° 61° 143 68 14 0 0
03-01 21° 43° 153 68 14 0 0
03-02 14° 34° 155 68 14 0 0
03-03 26° 43° 167 71 14 0 0
03-04 41° 64° 198 91 24 2 0
03-05 32° 55° 219 102 25 2 0
03-06 30° 39° 232 105 25 2 0
03-07 30° 42° 246 110 25 2 0
03-08 31° 48° 264 117 25 2 0
03-09 33° 58° 287 130 29 2 0
03-10 35° 66° 316 149 37 3 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 46° 70° 352 175 53 11 3
03-12 36° 69° 383 196 64 14 3
03-13 37° 73° 415 219 77 18 3
03-14 48° 76° 456 249 97 31 10
03-15 56° 69° 496 280 118 44 18
03-16 33° 56° 519 292 121 44 18
03-17 28° 49° 536 299 121 44 18
03-18 41° 72° 570 324 136 50 20
03-19 53° 65° 607 351 153 59 24
03-20 33° 50° 627 360 153 59 24
03-21 29° 55° 647 370 153 59 24
03-22 38° 50° 669 382 155 59 24
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 32° 45° 686 389 155 59 24
03-24 36° 52° 708 401 157 59 24
03-25 36° 49° 729 412 157 59 24
03-26 30° 53° 748 421 157 59 24
03-27 37° 57° 773 436 162 59 24
03-28 48° 79° 814 467 184 73 32
03-29 61° 68° 856 500 206 87 42
03-30 56° 70° 898 531 227 101 50
03-31 35° 57° 921 545 231 101 50
04-01 29° 50° 939 552 231 101 50
04-02 43° 79° 978 581 250 112 56
04-03 50° 64° 1014 607 266 119 59
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 44° 56° 1041 625 274 119 59
04-05 44° 59° 1071 644 283 121 59
04-06 37° 45° 1090 653 283 121 59
04-07 31° 53° 1110 663 283 121 59
04-08 26° 42° 1122 665 283 121 59
04-09 30° 44° 1137 670 283 121 59
04-10 37° 54° 1160 684 287 121 59
04-11 37° 51° 1182 696 289 121 59
04-12 31° 57° 1205 708 291 121 59
04-13 43° 62° 1235 728 302 124 59
04-14 55° 71° 1276 760 323 137 67
04-15 45° 54° 1304 777 330 137 67
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 36° 56° 1328 791 334 137 67
04-17 38° 67° 1358 811 345 139 67
04-18 56° 80° 1404 847 370 157 80
04-19 53° 71° 1444 877 390 169 87
04-20 48° 72° 1482 905 409 179 92
04-21 53° 67° 1521 934 427 190 97
04-22 45° 71° 1557 960 443 198 101
04-23 50° 77° 1598 992 465 212 109
04-24 51° 82° 1643 1026 490 228 121
04-25 55° 71° 1684 1057 511 241 129
04-26 43° 60° 1714 1077 520 243 129
04-27 41° 66° 1745 1098 532 246 129
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 54° 80° 1790 1134 557 264 141
04-29 60° 78° 1837 1170 584 282 155
04-30 47° 69° 1873 1197 600 291 158
05-01 63° 74° 1920 1233 627 309 172
05-02 58° 72° 1963 1266 649 324 182
05-03 52° 58° 1996 1289 663 329 182
05-04 45° 51° 2022 1305 669 329 182
05-05 50° 61° 2056 1329 682 335 182
05-06 52° 71° 2095 1358 702 346 189
05-07 51° 76° 2137 1390 723 360 197
05-08 54° 70° 2177 1420 743 372 204
05-09 42° 67° 2209 1442 756 376 204
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 42° 78° 2247 1470 774 386 209
05-11 50° 79° 2290 1503 796 401 219
05-12 56° 76° 2333 1537 820 416 230
05-13 62° 73° 2379 1572 845 434 242
05-14 62° 75° 2425 1608 872 452 256
05-15 64° 84° 2477 1650 904 476 275
05-16 62° 83° 2528 1691 935 499 292
05-17 59° 70° 2571 1724 957 514 302
05-18 53° 73° 2611 1754 978 526 309
05-19 50° 74° 2651 1785 998 538 317
05-20 51° 63° 2687 1810 1013 546 319
05-21 53° 61° 2721 1835 1028 552 321
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 47° 57° 2751 1855 1038 554 321
05-23 41° 65° 2782 1875 1049 557 321
05-24 45° 69° 2817 1900 1063 564 322
05-25 50° 62° 2851 1924 1077 570 323
05-26 46° 71° 2887 1950 1094 578 326
05-27 56° 68° 2927 1980 1114 590 333
05-28 58° 65° 2967 2010 1133 602 340
05-29 53° 70° 3006 2040 1153 613 347
05-30 58° 75° 3051 2074 1177 630 358
05-31 55° 72° 3092 2106 1199 643 367
06-01 41° 73° 3128 2131 1214 651 369
06-02 46° 81° 3169 2162 1236 664 378
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 60° 86° 3220 2203 1266 687 395
06-04 69° 84° 3274 2247 1301 713 417
06-05 67° 75° 3323 2287 1330 734 433
06-06 66° 76° 3372 2326 1359 755 449
06-07 63° 77° 3420 2364 1387 775 464
06-08 62° 77° 3468 2401 1415 795 478
06-09 60° 76° 3514 2437 1441 813 492
06-10 55° 76° 3558 2471 1464 829 502
06-11 57° 84° 3606 2509 1493 849 518
06-12 62° 84° 3658 2551 1524 873 536
06-13 69° 78° 3709 2592 1555 896 554
06-14 66° 73° 3756 2629 1583 915 569
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 65° 79° 3806 2669 1613 937 585
06-16 64° 81° 3857 2710 1643 960 603
06-17 69° 83° 3911 2754 1678 986 624
06-18 67° 85° 3965 2799 1712 1012 646
06-19 67° 80° 4017 2840 1744 1036 664
06-20 64° 83° 4069 2882 1775 1060 683
06-21 70° 91° 4127 2930 1814 1090 708
06-22 75° 92° 4189 2982 1855 1124 737
06-23 74° 92° 4250 3033 1896 1157 765
06-24 75° 92° 4311 3084 1938 1190 794
06-25 75° 89° 4371 3134 1978 1222 821
06-26 73° 89° 4430 3184 2017 1253 847
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 75° 88° 4490 3233 2057 1285 874
06-28 73° 87° 4548 3282 2095 1315 899
06-29 71° 83° 4603 3326 2130 1342 921
06-30 73° 85° 4660 3373 2167 1371 945
07-01 70° 84° 4715 3418 2202 1398 967
07-02 61° 84° 4766 3459 2233 1421 984
07-03 67° 87° 4821 3504 2268 1448 1006
07-04 66° 88° 4876 3549 2302 1475 1028
07-05 69° 90° 4933 3596 2340 1504 1052
07-06 72° 89° 4991 3644 2378 1534 1077
07-07 69° 79° 5043 3687 2410 1558 1097
07-08 62° 85° 5095 3728 2441 1582 1115
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 70° 82° 5149 3772 2476 1608 1136
07-10 67° 87° 5204 3817 2511 1635 1158
07-11 71° 89° 5262 3865 2548 1665 1183
07-12 73° 84° 5318 3912 2585 1693 1207
07-13 70° 85° 5374 3957 2620 1721 1229
07-14 69° 85° 5429 4002 2655 1748 1251
07-15 69° 85° 5484 4047 2691 1775 1273
07-16 71° 85° 5540 4094 2727 1803 1297
07-17 70° 84° 5595 4138 2762 1830 1319
07-18 66° 80° 5647 4180 2793 1854 1337
07-19 67° 81° 5698 4221 2825 1877 1356
07-20 72° 80° 5752 4266 2859 1903 1377
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 70° 82° 5806 4310 2893 1929 1398
07-22 64° 83° 5858 4351 2924 1953 1416
07-23 63° 88° 5911 4394 2958 1978 1437
07-24 73° 92° 5972 4445 2998 2011 1464
07-25 77° 87° 6031 4494 3038 2042 1491
07-26 74° 88° 6090 4544 3077 2073 1517
07-27 75° 88° 6150 4593 3117 2105 1544
07-28 74° 87° 6209 4642 3155 2136 1569
07-29 72° 91° 6268 4692 3195 2167 1596
07-30 70° 89° 6326 4739 3232 2197 1620
07-31 65° 74° 6373 4776 3260 2216 1634
08-01 58° 75° 6418 4811 3284 2233 1646
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 74° 6461 4844 3308 2248 1657
08-03 54° 78° 6505 4878 3332 2264 1667
08-04 62° 80° 6554 4917 3361 2285 1683
08-05 64° 82° 6605 4958 3392 2308 1701
08-06 64° 84° 6657 5000 3424 2332 1720
08-07 66° 86° 6711 5044 3458 2358 1741
08-08 66° 87° 6766 5089 3492 2385 1763
08-09 69° 88° 6822 5136 3529 2413 1787
08-10 68° 89° 6879 5182 3565 2442 1810
08-11 69° 88° 6936 5229 3602 2471 1834
08-12 69° 85° 6991 5274 3637 2498 1856
08-13 68° 85° 7045 5318 3672 2524 1877
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 63° 85° 7097 5360 3704 2548 1897
08-15 65° 89° 7152 5405 3739 2575 1918
08-16 70° 89° 7209 5453 3776 2604 1943
08-17 70° 87° 7266 5499 3812 2633 1966
08-18 68° 86° 7321 5544 3848 2660 1988
08-19 71° 85° 7377 5590 3884 2688 2011
08-20 69° 74° 7427 5630 3913 2710 2028
08-21 66° 74° 7475 5668 3942 2730 2043
08-22 61° 76° 7522 5705 3968 2749 2057
08-23 64° 78° 7571 5744 3998 2770 2073
08-24 59° 74° 7615 5779 4022 2786 2085
08-25 52° 70° 7654 5808 4041 2797 2091
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 49° 72° 7693 5836 4060 2808 2096
08-27 47° 75° 7732 5865 4079 2819 2102
08-28 56° 75° 7775 5898 4102 2834 2113
08-29 49° 74° 7815 5928 4121 2846 2119
08-30 49° 74° 7855 5958 4141 2858 2126
08-31 47° 76° 7894 5987 4161 2869 2133
09-01 48° 80° 7936 6019 4183 2883 2142
09-02 52° 82° 7981 6054 4208 2900 2154
09-03 53° 80° 8026 6089 4232 2917 2165
09-04 53° 68° 8064 6118 4251 2927 2171
09-05 51° 73° 8105 6148 4271 2940 2178
09-06 51° 67° 8142 6175 4289 2949 2182
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 49° 69° 8179 6202 4305 2958 2186
09-08 42° 71° 8213 6226 4320 2964 2188
09-09 45° 76° 8252 6255 4338 2975 2193
09-10 52° 81° 8296 6290 4363 2991 2205
09-11 53° 82° 8342 6325 4389 3009 2217
09-12 53° 84° 8389 6362 4415 3028 2231
09-13 55° 75° 8432 6395 4438 3043 2241
09-14 61° 87° 8484 6437 4470 3067 2260
09-15 57° 87° 8534 6477 4500 3089 2277
09-16 57° 84° 8582 6515 4529 3109 2293
09-17 55° 87° 8631 6554 4558 3130 2308
09-18 56° 88° 8681 6595 4588 3152 2326
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 58° 88° 8732 6636 4619 3175 2344
09-20 60° 88° 8784 6678 4651 3199 2363
09-21 66° 82° 8836 6720 4683 3223 2382
09-22 64° 72° 8882 6756 4709 3241 2395
09-23 64° 77° 8931 6794 4737 3262 2410
09-24 65° 79° 8981 6834 4768 3284 2427
09-25 62° 76° 9028 6871 4795 3303 2442
09-26 53° 80° 9072 6905 4819 3319 2453
09-27 52° 85° 9119 6942 4845 3338 2466
09-28 56° 88° 9169 6982 4876 3360 2483
09-29 57° 87° 9219 7022 4906 3382 2500
09-30 56° 84° 9267 7060 4933 3402 2515
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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