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Crabgrass/Annual Bluegrass Preemergence Timer (GDD 32)
through Mon, May. 27. 2024

 

GDD Total: 2357 (Base 32) through Mon, May. 27, 2024

  

Greencastle, IN

       

Forecast »

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 33° 49° 19 9 0 0 0
02-16 24° 33° 26 9 0 0 0
02-17 11° 23° 26 9 0 0 0
02-18 14° 36° 29 9 0 0 0
02-19 19° 48° 40 10 0 0 0
02-20 28° 56° 60 20 0 0 0
02-21 36° 65° 89 39 9 1 0
02-22 43° 56° 116 56 16 1 0
02-23 36° 52° 138 68 18 1 0
02-24 28° 44° 152 72 18 1 0
02-25 28° 58° 173 83 19 1 0
02-26 35° 73° 205 105 31 5 0
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 58° 71° 247 137 53 19 9
02-28 26° 71° 273 153 60 19 9
02-29 23° 42° 284 154 60 19 9
03-01 30° 43° 298 159 60 19 9
03-02 40° 55° 324 174 65 19 9
03-03 40° 71° 357 197 78 25 10
03-04 54° 74° 399 229 101 39 19
03-05 49° 65° 435 255 116 46 21
03-06 43° 50° 459 269 120 46 21
03-07 44° 54° 486 286 127 46 21
03-08 47° 58° 517 307 138 48 21
03-09 38° 54° 541 321 142 48 21
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 30° 46° 557 327 142 48 21
03-11 27° 61° 579 339 144 48 21
03-12 43° 69° 613 363 158 54 22
03-13 45° 75° 651 391 176 64 27
03-14 56° 72° 693 423 198 78 36
03-15 45° 58° 722 442 207 80 36
03-16 37° 61° 749 459 214 80 36
03-17 34° 45° 766 467 214 80 36
03-18 30° 34° 777 467 214 80 36
03-19 26° 56° 796 476 214 80 36
03-20 34° 50° 816 486 214 80 36
03-21 30° 43° 830 490 214 80 36
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 32° 49° 849 499 214 80 36
03-23 32° 46° 866 506 214 80 36
03-24 32° 56° 887 517 216 80 36
03-25 47° 68° 923 543 231 87 39
03-26 42° 61° 952 562 241 89 39
03-27 35° 45° 970 570 241 89 39
03-28 29° 58° 992 582 243 89 39
03-29 40° 70° 1025 605 256 93 39
03-30 54° 76° 1068 638 278 108 48
03-31 45° 68° 1102 662 293 114 50
04-01 51° 71° 1141 691 312 126 56
04-02 41° 68° 1174 714 324 130 56
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 35° 41° 1190 720 324 130 56
04-04 35° 40° 1205 725 324 130 56
04-05 37° 45° 1224 734 324 130 56
04-06 30° 56° 1245 745 326 130 56
04-07 41° 64° 1276 766 336 133 56
04-08 46° 75° 1314 794 354 143 61
04-09 55° 73° 1356 826 376 157 70
04-10 53° 60° 1391 851 391 163 72
04-11 49° 60° 1423 873 403 168 72
04-12 46° 60° 1454 894 414 171 72
04-13 42° 69° 1488 918 428 177 72
04-14 58° 80° 1535 955 455 195 86
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 60° 79° 1582 992 482 215 101
04-16 62° 77° 1630 1030 510 234 115
04-17 66° 71° 1676 1066 536 253 128
04-18 49° 77° 1717 1097 557 266 136
04-19 49° 61° 1750 1120 570 271 136
04-20 40° 51° 1773 1133 574 271 136
04-21 35° 45° 1791 1142 574 271 136
04-22 34° 63° 1818 1158 580 271 136
04-23 49° 64° 1853 1183 595 277 138
04-24 41° 53° 1878 1198 600 277 138
04-25 35° 59° 1903 1214 606 277 138
04-26 45° 68° 1938 1238 620 284 140
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 62° 77° 1985 1276 648 303 154
04-28 67° 79° 2037 1317 679 327 172
04-29 61° 68° 2079 1349 701 341 182
04-30 56° 75° 2122 1382 724 356 192
05-01 59° 79° 2169 1419 751 375 206
05-02 59° 85° 2219 1459 781 397 223
05-03 63° 76° 2266 1496 808 416 237
05-04 58° 81° 2314 1534 836 436 252
05-05 60° 70° 2357 1567 859 451 262
05-06 58° 78° 2403 1603 885 469 275
05-07 63° 78° 2452 1642 914 490 291
05-08 55° 78° 2496 1676 938 506 302
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 56° 68° 2536 1707 959 518 309
05-10 50° 66° 2572 1732 974 526 312
05-11 55° 72° 2614 1764 996 540 321
05-12 48° 80° 2656 1796 1018 554 330
05-13 56° 80° 2702 1832 1044 572 343
05-14 60° 64° 2742 1862 1064 584 350
05-15 62° 71° 2787 1897 1089 601 361
05-16 55° 73° 2829 1929 1111 615 370
05-17 63° 75° 2876 1966 1138 634 385
05-18 58° 81° 2923 2003 1165 653 399
05-19 61° 86° 2974 2045 1197 676 417
05-20 64° 85° 3027 2087 1229 701 437
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 64° 87° 3080 2130 1262 726 457
05-22 65° 80° 3131 2171 1293 749 475
05-23 57° 78° 3177 2207 1319 767 487
05-24 61° 82° 3226 2246 1348 788 504
05-25 60° 79° 3274 2284 1376 808 519
05-26 62° 77° 3321 2321 1403 827 533
05-27 61° 74° 3367 2357 1429 845 546
05-28 56° 74° 3410 2390 1452 860 556
05-29 52° 71° 3449 2419 1471 871 562
05-30 48° 73° 3488 2448 1490 882 568
05-31 50° 75° 3528 2478 1510 894 575
06-01 55° 76° 3571 2511 1533 909 585
2024Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 62° 81° 3621 2551 1563 931 602
06-03 62° 84° 3671 2592 1594 953 619
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-15 41° 62° 30 20 10 2 0
02-16 35° 57° 54 34 14 2 0
02-17 22° 32° 59 34 14 2 0
02-18 21° 45° 70 35 14 2 0
02-19 37° 55° 94 49 18 2 0
02-20 36° 57° 119 63 22 2 0
02-21 37° 47° 139 73 22 2 0
02-22 41° 67° 171 96 35 6 0
02-23 30° 62° 195 110 39 6 0
02-24 23° 40° 205 110 39 6 0
02-25 30° 42° 219 114 39 6 0
02-26 28° 55° 238 123 39 6 0
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
02-27 46° 63° 271 146 51 11 0
02-28 40° 51° 294 160 55 11 0
02-29 n/a n/a n/a n/a n/a n/a n/a
03-01 41° 72° 329 184 70 17 2
03-02 33° 54° 351 196 72 17 2
03-03 34° 43° 367 202 72 17 2
03-04 30° 53° 387 212 72 17 2
03-05 34° 58° 410 226 75 17 2
03-06 45° 71° 446 251 91 25 5
03-07 39° 50° 469 264 94 25 5
03-08 33° 50° 488 273 94 25 5
03-09 33° 53° 509 284 95 25 5
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-10 35° 42° 525 291 95 25 5
03-11 34° 46° 543 299 95 25 5
03-12 33° 39° 557 303 95 25 5
03-13 29° 35° 567 303 95 25 5
03-14 28° 38° 579 304 95 25 5
03-15 21° 48° 591 306 95 25 5
03-16 37° 54° 614 320 98 25 5
03-17 30° 51° 633 328 98 25 5
03-18 19° 30° 635 328 98 25 5
03-19 16° 35° 639 328 98 25 5
03-20 23° 48° 652 332 98 25 5
03-21 31° 51° 672 341 98 25 5
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
03-22 40° 53° 696 356 102 25 5
03-23 45° 62° 728 377 114 29 5
03-24 41° 47° 750 389 116 29 5
03-25 39° 53° 774 403 120 29 5
03-26 33° 63° 800 419 126 29 5
03-27 37° 51° 822 432 128 29 5
03-28 30° 49° 840 439 128 29 5
03-29 33° 53° 861 450 129 29 5
03-30 31° 62° 885 465 134 29 5
03-31 50° 66° 921 491 150 37 7
04-01 40° 60° 949 508 157 37 7
04-02 33° 57° 972 521 160 37 7
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-03 46° 74° 1009 549 178 46 12
04-04 57° 79° 1055 585 204 64 25
04-05 46° 74° 1093 612 222 74 30
04-06 40° 49° 1115 625 224 74 30
04-07 35° 58° 1140 639 228 74 30
04-08 40° 62° 1169 658 237 75 30
04-09 39° 65° 1199 678 248 77 30
04-10 40° 70° 1232 701 260 82 30
04-11 42° 74° 1268 728 277 91 33
04-12 51° 77° 1311 760 299 105 42
04-13 46° 80° 1351 791 320 118 50
04-14 58° 77° 1397 826 346 135 63
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-15 56° 79° 1442 862 371 153 75
04-16 41° 68° 1475 884 384 157 75
04-17 38° 54° 1499 898 387 157 75
04-18 31° 60° 1522 912 391 157 75
04-19 46° 80° 1564 943 412 171 83
04-20 60° 83° 1613 983 442 192 100
04-21 46° 63° 1646 1005 454 197 100
04-22 39° 50° 1668 1018 457 197 100
04-23 36° 45° 1687 1027 457 197 100
04-24 29° 55° 1707 1037 457 197 100
04-25 38° 59° 1734 1053 463 197 100
04-26 39° 60° 1761 1071 471 197 100
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
04-27 38° 64° 1790 1090 480 198 100
04-28 48° 60° 1822 1112 492 202 100
04-29 42° 69° 1856 1136 506 208 101
04-30 42° 50° 1880 1150 510 208 101
05-01 41° 51° 1904 1164 514 208 101
05-02 40° 60° 1932 1182 522 208 101
05-03 38° 61° 1960 1199 530 208 101
05-04 38° 69° 1991 1221 541 211 101
05-05 47° 76° 2031 1250 561 222 107
05-06 58° 74° 2074 1284 584 238 118
05-07 59° 76° 2120 1320 610 256 131
05-08 61° 75° 2166 1355 636 274 144
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-09 53° 75° 2208 1388 658 288 153
05-10 51° 77° 2250 1420 680 302 162
05-11 53° 82° 2296 1455 706 319 174
05-12 65° 76° 2344 1494 734 340 190
05-13 66° 84° 2397 1537 767 365 210
05-14 64° 76° 2445 1575 795 385 225
05-15 53° 69° 2484 1604 814 396 231
05-16 57° 66° 2524 1633 834 407 237
05-17 54° 73° 2565 1664 855 421 246
05-18 46° 74° 2603 1692 873 430 250
05-19 54° 81° 2648 1727 898 448 263
05-20 52° 65° 2684 1754 914 456 266
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
05-21 45° 76° 2723 1782 933 467 272
05-22 52° 76° 2765 1814 955 481 281
05-23 55° 82° 2811 1851 981 499 294
05-24 55° 84° 2858 1888 1008 518 308
05-25 51° 71° 2898 1917 1027 529 314
05-26 47° 76° 2937 1947 1047 541 321
05-27 51° 77° 2979 1978 1069 555 330
05-28 56° 79° 3024 2014 1094 572 342
05-29 57° 84° 3073 2052 1123 593 358
05-30 58° 85° 3123 2092 1152 614 374
05-31 64° 86° 3176 2135 1186 640 395
06-01 64° 88° 3230 2179 1220 666 416
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-02 62° 90° 3284 2223 1254 692 437
06-03 64° 91° 3340 2269 1289 719 459
06-04 67° 83° 3393 2312 1323 744 479
06-05 55° 80° 3438 2348 1348 762 492
06-06 54° 87° 3487 2386 1377 783 508
06-07 62° 77° 3534 2424 1404 802 522
06-08 49° 77° 3576 2455 1425 815 530
06-09 48° 81° 3618 2487 1448 830 540
06-10 53° 85° 3665 2524 1474 848 553
06-11 58° 66° 3705 2554 1495 860 560
06-12 52° 68° 3743 2583 1513 871 566
06-13 55° 75° 3786 2615 1536 886 576
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-14 60° 79° 3833 2653 1563 905 590
06-15 59° 86° 3884 2694 1594 928 608
06-16 53° 72° 3925 2724 1615 941 616
06-17 52° 81° 3969 2759 1639 957 627
06-18 56° 84° 4017 2797 1667 977 642
06-19 65° 82° 4069 2838 1698 1000 660
06-20 66° 88° 4124 2883 1733 1027 682
06-21 67° 85° 4177 2927 1767 1053 703
06-22 63° 82° 4228 2967 1798 1076 721
06-23 65° 81° 4278 3008 1828 1098 738
06-24 60° 91° 4332 3052 1862 1124 759
06-25 69° 89° 4389 3099 1899 1153 783
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
06-26 66° 80° 4440 3140 1930 1176 801
06-27 61° 80° 4489 3178 1959 1197 817
06-28 52° 81° 4534 3213 1983 1213 828
06-29 58° 77° 4579 3249 2009 1231 841
06-30 63° 85° 4631 3291 2041 1255 860
07-01 68° 84° 4686 3335 2076 1281 881
07-02 69° 82° 4740 3379 2109 1307 902
07-03 68° 85° 4794 3423 2144 1334 924
07-04 66° 88° 4849 3468 2179 1361 946
07-05 68° 88° 4905 3514 2215 1389 969
07-06 69° 83° 4959 3559 2249 1415 990
07-07 63° 83° 5010 3599 2280 1438 1008
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-08 64° 78° 5059 3639 2309 1459 1024
07-09 59° 80° 5107 3676 2336 1478 1038
07-10 59° 82° 5155 3715 2365 1499 1054
07-11 63° 85° 5207 3756 2397 1523 1073
07-12 66° 85° 5260 3800 2430 1548 1093
07-13 69° 82° 5314 3843 2464 1574 1114
07-14 62° 88° 5367 3886 2497 1598 1133
07-15 69° 83° 5421 3930 2531 1625 1155
07-16 64° 84° 5473 3972 2562 1648 1173
07-17 67° 82° 5525 4015 2595 1673 1193
07-18 63° 82° 5575 4055 2625 1695 1210
07-19 66° 83° 5628 4098 2658 1720 1230
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
07-20 70° 86° 5684 4143 2694 1748 1253
07-21 62° 79° 5732 4182 2722 1768 1268
07-22 61° 80° 5781 4220 2751 1788 1283
07-23 59° 83° 5830 4260 2780 1810 1300
07-24 67° 87° 5885 4305 2815 1837 1322
07-25 64° 88° 5939 4349 2849 1863 1343
07-26 73° 88° 5998 4397 2888 1894 1369
07-27 74° 88° 6056 4446 2926 1924 1394
07-28 71° 91° 6115 4495 2965 1955 1420
07-29 69° 86° 6171 4540 3001 1982 1442
07-30 64° 84° 6223 4582 3033 2006 1461
07-31 62° 81° 6272 4621 3062 2028 1478
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-01 57° 81° 6319 4658 3089 2047 1492
08-02 61° 78° 6366 4696 3116 2066 1506
08-03 66° 85° 6420 4739 3150 2092 1527
08-04 63° 87° 6473 4783 3183 2117 1547
08-05 68° 85° 6528 4827 3218 2144 1569
08-06 66° 81° 6580 4869 3250 2167 1587
08-07 67° 75° 6629 4908 3279 2189 1604
08-08 59° 81° 6677 4946 3307 2209 1619
08-09 62° 80° 6726 4986 3336 2230 1635
08-10 66° 82° 6778 5027 3368 2253 1653
08-11 64° 85° 6830 5070 3400 2278 1673
08-12 71° 87° 6887 5117 3437 2307 1697
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-13 62° 86° 6939 5159 3469 2331 1716
08-14 68° 78° 6990 5200 3500 2354 1734
08-15 61° 73° 7035 5235 3525 2371 1746
08-16 55° 79° 7080 5270 3550 2388 1758
08-17 60° 78° 7128 5307 3577 2407 1772
08-18 54° 76° 7171 5340 3601 2422 1782
08-19 56° 80° 7217 5376 3627 2441 1796
08-20 64° 88° 7271 5421 3661 2467 1817
08-21 75° 90° 7332 5472 3702 2500 1845
08-22 74° 89° 7392 5521 3742 2532 1872
08-23 69° 91° 7450 5570 3780 2562 1897
08-24 76° 94° 7513 5623 3823 2597 1927
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
08-25 79° 94° 7577 5677 3867 2633 1958
08-26 70° 84° 7632 5722 3902 2660 1980
08-27 66° 80° 7684 5763 3934 2684 1999
08-28 58° 79° 7730 5800 3960 2702 2012
08-29 54° 81° 7776 5835 3986 2720 2025
08-30 59° 74° 7820 5870 4010 2736 2036
08-31 53° 76° 7863 5902 4033 2751 2046
09-01 54° 81° 7909 5938 4059 2769 2059
09-02 59° 86° 7960 5979 4089 2791 2076
09-03 69° 88° 8016 6025 4126 2819 2099
09-04 66° 88° 8071 6070 4161 2847 2122
09-05 70° 87° 8128 6117 4198 2875 2145
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-06 68° 84° 8181 6161 4231 2901 2166
09-07 66° 75° 8230 6199 4260 2922 2182
09-08 60° 71° 8274 6233 4283 2937 2192
09-09 61° 74° 8319 6268 4309 2955 2205
09-10 54° 78° 8363 6303 4333 2971 2216
09-11 56° 80° 8409 6339 4359 2989 2229
09-12 59° 74° 8453 6373 4383 3005 2240
09-13 48° 75° 8493 6402 4403 3017 2247
09-14 50° 75° 8533 6433 4423 3029 2254
09-15 52° 76° 8575 6465 4445 3043 2263
09-16 52° 74° 8616 6496 4466 3056 2271
09-17 52° 70° 8655 6525 4485 3067 2277
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-18 52° 72° 8695 6555 4505 3079 2284
09-19 50° 77° 8737 6586 4527 3092 2292
09-20 54° 81° 8782 6622 4552 3110 2305
09-21 62° 76° 8829 6659 4579 3129 2319
09-22 59° 83° 8878 6698 4608 3150 2335
09-23 55° 80° 8924 6734 4634 3168 2348
09-24 51° 80° 8968 6767 4658 3184 2359
09-25 56° 82° 9015 6804 4685 3203 2373
09-26 62° 82° 9065 6844 4714 3224 2389
09-27 62° 75° 9111 6881 4741 3243 2403
09-28 57° 74° 9155 6914 4765 3258 2413
09-29 54° 78° 9199 6948 4788 3274 2424
2023Lo
(F)
Hi
(F)
GDD
22
GDD
32
GDD
42
GDD
50
GDD
55
09-30 53° 82° 9244 6983 4814 3292 2437

 

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!