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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
forecast for Fri, Apr. 26. 2024

 

Forecasted GDD Total: 1007 (Base 32) through Fri, Apr. 26, 2024

  

Downers Grove, IL

        

Forecast »

“Flashback” to 2023

4/19

4/20

4/21

4/22

4/23

4/24

4/25

4/26

4/27

4/28

4/29

4/30

5/1

Done

801

Late

500

Optimum

250

Early

171

Under

0

 

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 31° 43° 15 5 0 0 0
02-16 27° 31° 22 5 0 0 0
02-17 12° 28° 22 5 0 0 0
02-18 21° 45° 33 6 0 0 0
02-19 22° 50° 47 10 0 0 0
02-20 27° 57° 67 20 0 0 0
02-21 44° 64° 99 42 12 4 0
02-22 45° 60° 129 62 22 6 0
02-23 27° 51° 146 69 22 6 0
02-24 19° 34° 151 69 22 6 0
02-25 31° 60° 175 83 26 6 0
02-26 38° 71° 207 106 39 11 0
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 54° 72° 248 137 60 24 8
02-28 21° 55° 264 143 60 24 8
02-29 18° 44° 274 143 60 24 8
03-01 30° 46° 290 149 60 24 8
03-02 33° 59° 314 163 64 24 8
03-03 43° 72° 350 189 80 32 11
03-04 52° 71° 390 219 99 44 17
03-05 40° 58° 417 236 106 44 17
03-06 37° 48° 437 246 107 44 17
03-07 36° 48° 457 256 107 44 17
03-08 42° 45° 479 267 108 44 17
03-09 33° 44° 495 274 108 44 17
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 30° 47° 511 280 108 44 17
03-11 30° 67° 538 297 115 44 17
03-12 47° 71° 575 324 132 52 21
03-13 48° 70° 612 351 149 61 25
03-14 44° 67° 645 374 162 66 25
03-15 37° 52° 668 387 165 66 25
03-16 39° 56° 694 402 171 66 25
03-17 31° 41° 707 406 171 66 25
03-18 26° 34° 716 406 171 66 25
03-19 30° 57° 737 418 172 66 25
03-20 30° 46° 753 423 172 66 25
03-21 25° 40° 763 424 172 66 25
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 31° 39° 776 427 172 66 25
03-23 29° 38° 788 429 172 66 25
03-24 31° 49° 806 437 172 66 25
03-25 45° 61° 837 458 183 70 25
03-26 34° 54° 859 470 185 70 25
03-27 29° 42° 872 473 185 70 25
03-28 29° 50° 890 481 185 70 25
03-29 32° 55° 911 492 187 70 25
03-30 41° 60° 940 511 195 70 25
03-31 38° 54° 964 524 199 70 25
04-01 41° 47° 986 537 201 70 25
04-02 36° 49° 1006 547 201 70 25
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 33° 37° 1019 550 201 70 25
04-04 36° 41° 1036 556 201 70 25
04-05 37° 47° 1056 566 202 70 25
04-06 31° 52° 1075 576 202 70 25
04-07 38° 51° 1098 588 204 70 25
04-08 47° 70° 1134 615 221 79 29
04-09 50° 62° 1168 639 235 85 30
04-10 43° 67° 1201 662 248 90 30
04-11 50° 58° 1234 684 260 94 30
04-12 48° 63° 1267 708 273 99 30
04-13 41° 71° 1301 732 288 106 32
04-14 61° 81° 1351 771 317 127 48
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 50° 70° 1388 799 335 137 53
04-16 54° 75° 1431 831 357 151 62
04-17 59° 68° 1472 863 379 165 70
04-18 47° 58° 1503 884 389 167 70
04-19 41° 56° 1529 900 396 167 70
04-20 35° 46° 1548 908 396 167 70
04-21 31° 47° 1565 916 396 167 70
04-22 38° 66° 1595 936 406 169 70
04-23 56° 63° 1632 963 423 179 75
04-24 36° 52° 1654 975 425 179 75
04-25 31° 59° 1677 988 428 179 75
04-26 42° 61° 1706 1007 437 180 75
2024Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 59° 80° 1754 1045 465 200 89
04-28 65° 79° 1804 1085 495 222 106
04-29 64° 74° 1851 1122 522 241 120
04-30 53° 75° 1893 1154 544 255 129
05-01 58° 75° 1937 1188 568 271 141
05-02 52° 67° 1975 1216 586 281 145
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 35° 51° 21 11 1 0 0
02-16 24° 34° 28 11 1 0 0
02-17 16° 25° 28 11 1 0 0
02-18 23° 45° 40 13 1 0 0
02-19 38° 51° 63 26 4 0 0
02-20 28° 48° 79 32 4 0 0
02-21 24° 40° 90 32 4 0 0
02-22 32° 34° 101 34 4 0 0
02-23 26° 41° 112 35 4 0 0
02-24 18° 29° 114 35 4 0 0
02-25 25° 37° 123 35 4 0 0
02-26 27° 51° 140 42 4 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 38° 58° 166 58 10 0 0
02-28 38° 50° 188 70 12 0 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 37° 55° 212 84 16 0 0
03-02 32° 41° 227 88 16 0 0
03-03 32° 37° 239 91 16 0 0
03-04 30° 48° 256 98 16 0 0
03-05 30° 51° 274 106 16 0 0
03-06 41° 54° 300 122 22 0 0
03-07 35° 45° 319 130 22 0 0
03-08 34° 46° 337 139 22 0 0
03-09 34° 41° 352 144 22 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-10 32° 37° 365 146 22 0 0
03-11 32° 39° 378 150 22 0 0
03-12 30° 36° 389 151 22 0 0
03-13 27° 32° 397 151 22 0 0
03-14 21° 37° 404 151 22 0 0
03-15 22° 50° 418 155 22 0 0
03-16 41° 47° 440 167 24 0 0
03-17 27° 49° 456 173 24 0 0
03-18 12° 25° 456 173 24 0 0
03-19 17° 39° 462 173 24 0 0
03-20 27° 51° 479 180 24 0 0
03-21 35° 53° 501 192 26 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-22 39° 50° 524 205 29 0 0
03-23 37° 47° 544 215 29 0 0
03-24 34° 44° 561 222 29 0 0
03-25 34° 44° 578 229 29 0 0
03-26 33° 47° 596 237 29 0 0
03-27 31° 47° 613 244 29 0 0
03-28 28° 50° 630 251 29 0 0
03-29 29° 42° 643 254 29 0 0
03-30 26° 55° 662 263 29 0 0
03-31 53° 67° 700 291 47 10 5
04-01 35° 54° 722 303 49 10 5
04-02 30° 55° 742 314 50 10 5
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-03 43° 60° 772 333 59 12 5
04-04 44° 67° 806 357 73 18 6
04-05 39° 71° 839 380 86 23 6
04-06 31° 51° 858 389 86 23 6
04-07 33° 51° 878 400 86 23 6
04-08 36° 63° 906 417 94 23 6
04-09 41° 68° 938 440 106 27 6
04-10 46° 71° 975 466 123 35 10
04-11 49° 78° 1017 498 144 49 18
04-12 57° 81° 1064 535 172 68 32
04-13 55° 83° 1111 572 199 87 46
04-14 55° 83° 1158 609 226 106 60
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-15 64° 81° 1209 650 256 129 78
04-16 36° 71° 1240 671 268 133 78
04-17 31° 38° 1252 674 268 133 78
04-18 31° 58° 1275 686 270 133 78
04-19 42° 69° 1308 710 284 138 79
04-20 50° 79° 1351 742 306 153 88
04-21 43° 62° 1382 763 317 155 88
04-22 38° 48° 1403 774 318 155 88
04-23 35° 40° 1419 780 318 155 88
04-24 32° 53° 1439 790 319 155 88
04-25 35° 46° 1458 799 319 155 88
04-26 31° 51° 1477 808 319 155 88
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-27 33° 67° 1505 826 326 155 88
04-28 44° 63° 1536 848 338 159 88
04-29 41° 56° 1563 864 344 159 88
04-30 39° 45° 1582 874 344 159 88
05-01 40° 48° 1604 885 346 159 88
05-02 41° 54° 1630 901 352 159 88
05-03 38° 60° 1657 918 359 159 88
05-04 40° 72° 1691 942 372 165 89
05-05 54° 78° 1734 976 396 181 100
05-06 60° 78° 1781 1013 423 200 114
05-07 63° 86° 1834 1055 456 224 133
05-08 51° 65° 1870 1081 472 232 137
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-09 47° 71° 1907 1108 489 241 141
05-10 48° 80° 1949 1140 511 255 150
05-11 54° 84° 1996 1178 538 275 164
05-12 62° 76° 2043 1215 565 294 178
05-13 57° 69° 2084 1246 586 307 186
05-14 53° 64° 2121 1272 603 315 190
05-15 50° 69° 2159 1300 621 325 194
05-16 51° 80° 2202 1333 644 340 205
05-17 46° 63° 2234 1355 656 344 205
05-18 43° 75° 2271 1382 673 353 209
05-19 60° 74° 2316 1417 698 370 220
05-20 48° 71° 2353 1445 715 380 225
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-21 51° 80° 2397 1478 739 395 236
05-22 54° 80° 2442 1513 764 412 248
05-23 58° 85° 2492 1553 794 434 264
05-24 54° 69° 2531 1582 813 445 271
05-25 48° 61° 2564 1605 826 450 271
05-26 44° 70° 2599 1630 841 457 272
05-27 45° 73° 2636 1657 858 466 277
05-28 54° 79° 2680 1691 882 482 288
05-29 54° 84° 2727 1728 909 501 302
05-30 60° 89° 2780 1771 941 526 321
05-31 69° 88° 2836 1817 978 554 345
06-01 67° 90° 2893 1864 1014 583 368
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-02 67° 91° 2949 1911 1051 612 392
06-03 66° 89° 3005 1956 1087 639 415
06-04 64° 78° 3053 1995 1115 660 430
06-05 55° 85° 3102 2033 1143 680 445
06-06 63° 80° 3151 2072 1173 701 462
06-07 58° 76° 3196 2107 1198 718 474
06-08 52° 74° 3237 2138 1219 731 482
06-09 51° 81° 3281 2173 1243 748 493
06-10 59° 86° 3332 2213 1274 770 511
06-11 52° 74° 3373 2244 1295 783 519
06-12 49° 70° 3410 2271 1312 792 523
06-13 55° 64° 3448 2299 1330 802 527
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-14 58° 76° 3493 2334 1355 819 539
06-15 54° 82° 3538 2370 1380 837 552
06-16 51° 67° 3576 2397 1398 846 556
06-17 50° 82° 3620 2431 1422 862 567
06-18 58° 87° 3670 2472 1452 885 585
06-19 62° 86° 3723 2514 1485 909 605
06-20 61° 85° 3774 2555 1516 932 623
06-21 63° 89° 3828 2599 1550 958 643
06-22 67° 86° 3882 2644 1584 985 665
06-23 66° 86° 3937 2688 1619 1011 686
06-24 64° 93° 3993 2734 1655 1039 710
06-25 68° 83° 4047 2778 1689 1065 731
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-26 67° 73° 4095 2816 1717 1085 746
06-27 64° 77° 4143 2854 1745 1105 761
06-28 57° 86° 4193 2894 1775 1127 778
06-29 72° 87° 4250 2941 1812 1156 802
06-30 69° 90° 4308 2989 1850 1186 826
07-01 71° 83° 4363 3034 1884 1213 848
07-02 66° 73° 4410 3072 1912 1233 863
07-03 63° 84° 4462 3113 1944 1256 882
07-04 68° 90° 4519 3160 1981 1285 906
07-05 71° 89° 4577 3208 2018 1315 930
07-06 67° 80° 4628 3249 2050 1338 949
07-07 62° 81° 4678 3289 2080 1360 965
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-08 64° 73° 4724 3325 2106 1378 979
07-09 59° 83° 4773 3364 2135 1399 995
07-10 62° 84° 4824 3405 2166 1422 1013
07-11 67° 87° 4879 3450 2201 1449 1035
07-12 62° 77° 4926 3488 2228 1469 1049
07-13 63° 76° 4974 3525 2256 1488 1063
07-14 68° 88° 5029 3571 2291 1516 1086
07-15 69° 83° 5083 3615 2325 1542 1107
07-16 65° 79° 5134 3655 2356 1564 1124
07-17 64° 79° 5183 3694 2385 1585 1141
07-18 59° 79° 5230 3731 2412 1604 1155
07-19 59° 85° 5280 3771 2442 1626 1172
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-20 69° 84° 5335 3816 2476 1653 1193
07-21 65° 80° 5385 3856 2507 1675 1211
07-22 62° 84° 5436 3897 2538 1698 1229
07-23 63° 83° 5487 3938 2569 1721 1247
07-24 65° 87° 5541 3982 2603 1747 1268
07-25 66° 89° 5597 4028 2639 1775 1290
07-26 75° 88° 5656 4078 2678 1807 1317
07-27 72° 92° 5716 4128 2718 1839 1344
07-28 72° 92° 5776 4177 2758 1870 1371
07-29 68° 82° 5829 4220 2791 1895 1391
07-30 65° 78° 5878 4260 2820 1917 1407
07-31 61° 81° 5927 4299 2849 1938 1423
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-01 66° 84° 5980 4342 2882 1963 1443
08-02 65° 83° 6033 4384 2914 1987 1462
08-03 65° 87° 6086 4428 2948 2013 1483
08-04 68° 85° 6140 4472 2982 2039 1504
08-05 68° 75° 6190 4511 3012 2060 1521
08-06 65° 72° 6237 4548 3039 2079 1534
08-07 66° 78° 6287 4588 3069 2101 1551
08-08 60° 82° 6336 4627 3098 2122 1567
08-09 63° 77° 6384 4665 3126 2142 1582
08-10 63° 83° 6435 4706 3157 2165 1601
08-11 67° 83° 6488 4749 3190 2190 1621
08-12 69° 85° 6543 4795 3225 2218 1643
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-13 63° 80° 6593 4834 3255 2239 1660
08-14 64° 74° 6640 4871 3282 2258 1674
08-15 62° 75° 6687 4908 3309 2277 1687
08-16 55° 80° 6732 4944 3334 2295 1700
08-17 64° 78° 6781 4983 3363 2316 1716
08-18 56° 77° 6826 5017 3388 2332 1728
08-19 59° 82° 6874 5055 3416 2352 1743
08-20 71° 91° 6933 5104 3455 2383 1769
08-21 69° 83° 6987 5149 3489 2410 1790
08-22 67° 89° 7044 5195 3525 2438 1813
08-23 77° 97° 7108 5249 3570 2474 1845
08-24 80° 98° 7175 5306 3617 2513 1879
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-25 71° 82° 7229 5351 3651 2540 1900
08-26 66° 75° 7278 5389 3680 2560 1916
08-27 62° 75° 7325 5426 3707 2579 1929
08-28 55° 80° 7370 5461 3732 2596 1942
08-29 61° 83° 7421 5502 3763 2619 1959
08-30 57° 69° 7462 5533 3784 2632 1968
08-31 50° 77° 7504 5565 3805 2646 1976
09-01 55° 83° 7551 5602 3832 2665 1990
09-02 60° 87° 7602 5643 3864 2688 2009
09-03 67° 92° 7659 5691 3901 2718 2033
09-04 70° 91° 7718 5739 3940 2748 2059
09-05 74° 89° 7778 5789 3980 2780 2085
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-06 69° 78° 7829 5830 4011 2803 2103
09-07 64° 69° 7874 5865 4035 2820 2115
09-08 60° 66° 7914 5895 4056 2832 2123
09-09 53° 73° 7956 5927 4078 2846 2131
09-10 51° 79° 7999 5960 4101 2861 2142
09-11 61° 68° 8042 5993 4123 2876 2151
09-12 54° 69° 8081 6022 4143 2887 2158
09-13 52° 67° 8119 6050 4161 2897 2162
09-14 48° 70° 8156 6077 4178 2906 2167
09-15 49° 76° 8197 6108 4199 2919 2175
09-16 56° 69° 8237 6139 4219 2932 2182
09-17 57° 65° 8276 6168 4238 2943 2188
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-18 52° 69° 8315 6196 4257 2953 2193
09-19 55° 63° 8352 6223 4274 2962 2197
09-20 60° 78° 8398 6260 4300 2981 2211
09-21 64° 75° 8446 6297 4328 3000 2225
09-22 65° 76° 8494 6335 4356 3020 2241
09-23 62° 78° 8542 6374 4384 3041 2256
09-24 56° 78° 8587 6408 4409 3057 2268
09-25 62° 74° 8633 6444 4435 3075 2281
09-26 63° 73° 8679 6480 4461 3093 2293
09-27 62° 69° 8722 6513 4484 3108 2304
09-28 61° 68° 8765 6546 4507 3123 2313
09-29 54° 73° 8806 6577 4528 3136 2322
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-30 58° 81° 8854 6615 4556 3156 2336

 

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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