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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Air Temperature - 24 Hour Min/Max
forecast for Sat, Jun. 13. 2026

 

Forecasted high of 85°F for Sat, Jun. 13. 2026

  

IA

        

Forecast »

“Flashback” to 2025

6/1

6/2

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6/13

 

90

 

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50

 

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 27° 62° 23 13 3 0 0
02-16 38° 68° 54 34 14 3 0
02-17 37° 64° 83 53 23 4 0
02-18 35° 59° 108 68 28 4 0
02-19 24° 34° 115 68 28 4 0
02-20 12° 24° 115 68 28 4 0
02-21 9° 22° 115 68 28 4 0
02-22 6° 21° 115 68 28 4 0
02-23 -1° 18° 115 68 28 4 0
02-24 12° 37° 118 68 28 4 0
02-25 18° 29° 119 68 28 4 0
02-26 20° 43° 129 68 28 4 0
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 30° 57° 151 80 30 4 0
02-28 20° 34° 155 80 30 4 0
03-01 14° 27° 155 80 30 4 0
03-02 21° 37° 163 80 30 4 0
03-03 34° 41° 178 86 30 4 0
03-04 32° 51° 198 95 30 4 0
03-05 39° 54° 222 110 34 4 0
03-06 44° 67° 256 134 48 9 1
03-07 31° 48° 274 141 48 9 1
03-08 34° 65° 301 159 56 9 1
03-09 46° 69° 336 184 71 17 3
03-10 38° 60° 363 200 78 17 3
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 31° 46° 379 207 78 17 3
03-12 25° 52° 396 213 78 17 3
03-13 33° 48° 414 222 78 17 3
03-14 32° 46° 431 229 78 17 3
03-15 20° 38° 439 229 78 17 3
03-16 6° 17° 439 229 78 17 3
03-17 5° 24° 439 229 78 17 3
03-18 22° 58° 457 237 78 17 3
03-19 34° 72° 488 258 89 20 3
03-20 49° 76° 528 289 109 32 10
03-21 50° 89° 576 326 137 51 25
03-22 35° 70° 607 347 148 54 25
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 27° 51° 623 353 148 54 25
03-24 34° 57° 647 367 151 54 25
03-25 40° 78° 684 394 168 63 28
03-26 43° 62° 714 414 178 65 28
03-27 28° 48° 730 421 178 65 28
03-28 18° 58° 747 427 178 65 28
03-29 36° 69° 777 447 189 68 28
03-30 42° 88° 820 480 212 83 38
03-31 44° 70° 855 505 227 90 40
04-01 38° 52° 878 518 230 90 40
04-02 38° 49° 899 530 231 90 40
04-03 36° 45° 918 538 231 90 40
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 36° 43° 936 546 231 90 40
04-05 32° 58° 959 559 235 90 40
04-06 35° 46° 978 568 235 90 40
04-07 31° 42° 992 572 235 90 40
04-08 38° 73° 1026 596 248 95 41
04-09 35° 52° 1047 607 250 95 41
04-10 35° 54° 1070 620 252 95 41
04-11 40° 56° 1096 636 258 95 41
04-12 54° 70° 1136 666 279 108 48
04-13 58° 81° 1184 704 307 128 63
04-14 58° 82° 1232 742 335 148 78
04-15 54° 68° 1271 771 354 159 84
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 49° 80° 1314 804 376 174 94
04-17 47° 79° 1355 835 398 187 103
04-18 32° 52° 1375 846 398 187 103
04-19 34° 54° 1398 858 400 187 103
04-20 32° 68° 1425 876 408 187 103
04-21 56° 86° 1474 915 437 208 119
04-22 57° 80° 1521 951 464 227 132
04-23 57° 75° 1565 985 487 242 143
04-24 42° 62° 1595 1005 498 244 143
04-25 43° 70° 1630 1030 512 251 145
04-26 53° 70° 1669 1059 532 263 151
04-27 49° 69° 1706 1086 549 272 155
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 42° 55° 1733 1103 556 272 155
04-29 43° 57° 1761 1121 564 272 155
04-30 43° 55° 1788 1138 571 272 155
05-01 38° 55° 1812 1153 575 272 155
05-02 32° 64° 1838 1169 581 272 155
05-03 50° 75° 1879 1199 602 284 162
05-04 47° 80° 1921 1231 623 298 171
05-05 42° 60° 1949 1250 632 299 171
05-06 37° 56° 1974 1264 637 299 171
05-07 40° 67° 2006 1286 649 303 171
05-08 43° 75° 2043 1313 666 312 175
05-09 45° 69° 2078 1338 681 319 177
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 38° 72° 2111 1361 694 324 177
05-11 38° 73° 2145 1385 707 330 178
05-12 59° 80° 2192 1422 735 349 193
05-13 49° 76° 2233 1453 756 362 201
05-14 50° 80° 2276 1486 778 376 210
05-15 55° 89° 2326 1526 809 399 227
05-16 57° 80° 2373 1563 835 418 241
05-17 62° 80° 2422 1602 864 439 257
05-18 62° 74° 2468 1638 891 457 271
05-19 50° 64° 2503 1663 906 464 273
05-20 41° 57° 2530 1680 913 464 273
05-21 51° 58° 2562 1703 925 468 273
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 51° 66° 2599 1729 942 477 276
05-23 58° 71° 2641 1762 964 491 286
05-24 52° 83° 2687 1797 990 509 298
05-25 63° 86° 2740 1840 1023 533 318
05-26 62° 88° 2793 1883 1056 558 338
05-27 63° 89° 2847 1927 1089 584 359
05-28 64° 87° 2901 1971 1123 610 380
05-29 63° 84° 2952 2012 1155 634 398
05-30 67° 80° 3003 2054 1186 657 417
05-31 58° 79° 3050 2090 1213 676 430
06-01 62° 86° 3102 2132 1245 699 449
06-02 59° 82° 3150 2171 1273 720 465
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 57° 84° 3199 2209 1302 740 480
06-04 66° 86° 3252 2253 1335 766 501
06-05 67° 82° 3305 2295 1368 791 520
06-06 68° 87° 3361 2341 1403 818 543
06-07 70° 80° 3413 2384 1436 843 563
06-08 66° 86° 3467 2428 1470 869 584
06-09 67° 91° 3524 2475 1507 898 608
06-10 72° 93° 3585 2525 1548 931 635
06-11 64° 83° 3636 2567 1579 954 654
06-12 59° 86° 3687 2607 1610 976 671
06-13 64° 85° 3739 2649 1642 1001 691
06-14 59° 79° 3786 2686 1669 1020 704
2026Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 17° 26° 0 0 0 0 0
02-16 0° 16° 0 0 0 0 0
02-17 -10° 1° 0 0 0 0 0
02-18 -18° 2° 0 0 0 0 0
02-19 -5° 7° 0 0 0 0 0
02-20 -10° 10° 0 0 0 0 0
02-21 -12° 19° 0 0 0 0 0
02-22 9° 35° 0 0 0 0 0
02-23 21° 54° 16 6 0 0 0
02-24 37° 51° 38 18 2 0 0
02-25 31° 56° 59 29 4 0 0
02-26 36° 52° 81 41 6 0 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 34° 53° 103 53 7 0 0
02-28 31° 56° 124 64 8 0 0
03-01 19° 30° 127 64 8 0 0
03-02 15° 46° 135 64 8 0 0
03-03 31° 64° 160 79 14 0 0
03-04 40° 54° 185 94 19 0 0
03-05 26° 35° 194 94 19 0 0
03-06 20° 42° 203 94 19 0 0
03-07 31° 37° 215 97 19 0 0
03-08 26° 47° 229 101 19 0 0
03-09 30° 58° 252 113 21 0 0
03-10 35° 72° 283 134 32 3 0
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 34° 54° 304 146 34 3 0
03-12 31° 65° 330 162 40 3 0
03-13 36° 73° 363 185 53 8 0
03-14 51° 79° 406 218 76 23 10
03-15 31° 52° 425 227 76 23 10
03-16 23° 44° 437 228 76 23 10
03-17 31° 76° 468 250 87 26 10
03-18 42° 72° 503 275 102 33 12
03-19 32° 51° 523 285 102 33 12
03-20 27° 45° 537 289 102 33 12
03-21 37° 58° 562 304 107 33 12
03-22 25° 58° 581 313 107 33 12
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 36° 51° 603 324 109 33 12
03-24 29° 50° 620 332 109 33 12
03-25 40° 56° 647 348 115 33 12
03-26 31° 60° 670 362 118 33 12
03-27 40° 70° 703 385 131 39 12
03-28 50° 82° 747 419 155 55 23
03-29 44° 68° 781 443 169 61 24
03-30 33° 51° 801 453 169 61 24
03-31 31° 47° 818 460 169 61 24
04-01 32° 43° 833 465 169 61 24
04-02 43° 67° 866 488 182 66 24
04-03 37° 49° 887 499 183 66 24
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 33° 52° 908 509 184 66 24
04-05 35° 47° 927 518 184 66 24
04-06 24° 57° 945 527 184 66 24
04-07 31° 44° 961 532 184 66 24
04-08 20° 53° 976 537 184 66 24
04-09 36° 64° 1004 556 192 66 24
04-10 40° 60° 1032 573 200 66 24
04-11 43° 56° 1060 591 207 66 24
04-12 35° 71° 1091 612 218 69 24
04-13 52° 77° 1133 645 241 83 34
04-14 45° 63° 1165 667 253 87 34
04-15 35° 61° 1192 683 259 87 34
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 35° 75° 1224 706 272 92 34
04-17 55° 79° 1269 741 297 109 46
04-18 50° 66° 1306 767 314 117 49
04-19 39° 56° 1331 783 319 117 49
04-20 40° 48° 1353 795 321 117 49
04-21 43° 64° 1385 816 333 121 49
04-22 51° 70° 1423 845 351 132 55
04-23 54° 74° 1465 877 373 146 64
04-24 53° 68° 1504 905 392 156 69
04-25 50° 57° 1536 927 403 160 69
04-26 39° 63° 1565 946 413 161 69
04-27 45° 66° 1598 970 426 167 70
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 57° 82° 1646 1007 454 186 84
04-29 45° 68° 1681 1032 469 193 86
04-30 43° 68° 1714 1056 482 199 87
05-01 53° 64° 1751 1082 499 207 90
05-02 44° 57° 1779 1101 507 208 90
05-03 44° 63° 1811 1123 519 211 90
05-04 40° 73° 1846 1148 534 218 92
05-05 46° 73° 1883 1175 551 228 97
05-06 47° 77° 1923 1205 571 240 104
05-07 53° 80° 1968 1240 596 256 116
05-08 52° 74° 2009 1270 617 269 123
05-09 45° 77° 2048 1299 636 280 129
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 52° 86° 2095 1336 662 299 143
05-11 55° 83° 2142 1373 689 318 157
05-12 48° 84° 2186 1407 713 334 168
05-13 57° 83° 2234 1445 742 354 183
05-14 60° 86° 2284 1486 772 377 201
05-15 64° 80° 2335 1526 803 399 218
05-16 51° 74° 2375 1556 823 411 225
05-17 47° 65° 2409 1580 836 417 226
05-18 40° 74° 2444 1605 852 424 228
05-19 51° 64° 2479 1630 867 431 230
05-20 50° 62° 2513 1655 881 437 232
05-21 48° 55° 2543 1674 891 439 232
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 43° 62° 2573 1695 901 441 232
05-23 42° 69° 2607 1718 915 447 232
05-24 52° 67° 2645 1746 932 457 237
05-25 54° 72° 2685 1777 953 470 245
05-26 48° 69° 2722 1803 970 478 248
05-27 56° 62° 2758 1830 986 487 252
05-28 54° 66° 2797 1858 1004 497 257
05-29 51° 68° 2834 1886 1022 507 262
05-30 54° 79° 2879 1920 1047 523 273
05-31 52° 85° 2925 1957 1073 542 287
06-01 56° 81° 2972 1994 1100 560 301
06-02 59° 88° 3024 2035 1132 584 319
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 58° 78° 3070 2071 1158 602 332
06-04 51° 78° 3112 2104 1180 616 342
06-05 55° 79° 3157 2139 1205 633 354
06-06 61° 79° 3205 2177 1233 653 369
06-07 63° 72° 3251 2212 1259 671 381
06-08 60° 71° 3294 2246 1282 686 392
06-09 56° 68° 3334 2276 1302 699 399
06-10 49° 84° 3379 2310 1327 715 410
06-11 60° 92° 3433 2354 1361 741 431
06-12 64° 85° 3485 2397 1393 765 451
06-13 65° 83° 3537 2439 1425 789 470
06-14 67° 88° 3592 2484 1460 817 492
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 67° 82° 3645 2526 1493 841 511
06-16 66° 86° 3699 2571 1527 867 533
06-17 64° 80° 3749 2611 1557 889 550
06-18 64° 78° 3798 2650 1586 910 566
06-19 60° 84° 3848 2690 1616 932 583
06-20 69° 88° 3904 2736 1652 961 606
06-21 79° 94° 3969 2790 1697 997 637
06-22 76° 92° 4031 2843 1739 1031 667
06-23 74° 88° 4090 2892 1778 1063 693
06-24 71° 78° 4143 2934 1811 1087 712
06-25 70° 88° 4200 2981 1847 1116 736
06-26 68° 87° 4255 3027 1883 1143 759
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 63° 82° 4306 3067 1914 1166 776
06-28 68° 89° 4362 3114 1950 1195 800
06-29 71° 82° 4417 3158 1985 1221 821
06-30 67° 84° 4470 3202 2018 1246 842
07-01 63° 84° 4522 3243 2050 1270 860
07-02 63° 84° 4574 3285 2081 1294 879
07-03 67° 91° 4630 3332 2118 1323 903
07-04 73° 89° 4689 3381 2157 1354 929
07-05 70° 83° 4744 3425 2192 1380 950
07-06 68° 85° 4799 3470 2227 1407 972
07-07 65° 84° 4851 3513 2259 1431 992
07-08 66° 85° 4905 3556 2293 1457 1012
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 66° 86° 4959 3600 2327 1483 1033
07-10 69° 85° 5014 3645 2362 1510 1055
07-11 67° 78° 5064 3686 2392 1532 1073
07-12 66° 78° 5114 3725 2422 1554 1089
07-13 58° 80° 5161 3763 2449 1573 1104
07-14 62° 87° 5214 3805 2481 1598 1123
07-15 68° 87° 5269 3850 2517 1625 1145
07-16 70° 79° 5322 3893 2550 1650 1165
07-17 59° 72° 5365 3927 2573 1666 1176
07-18 58° 80° 5412 3964 2600 1685 1190
07-19 68° 87° 5468 4009 2636 1712 1212
07-20 70° 84° 5523 4054 2670 1739 1234
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 71° 81° 5576 4098 2704 1765 1255
07-22 73° 89° 5635 4147 2743 1796 1281
07-23 73° 90° 5695 4196 2783 1827 1307
07-24 69° 82° 5749 4240 2816 1853 1328
07-25 68° 83° 5802 4284 2850 1878 1349
07-26 72° 86° 5859 4331 2887 1908 1373
07-27 71° 90° 5918 4379 2926 1938 1398
07-28 67° 87° 5973 4425 2961 1965 1421
07-29 67° 89° 6029 4471 2997 1993 1444
07-30 67° 80° 6081 4512 3029 2017 1462
07-31 63° 76° 6128 4550 3056 2036 1477
08-01 56° 74° 6171 4583 3079 2051 1487
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 57° 76° 6216 4617 3104 2068 1498
08-03 56° 76° 6260 4651 3127 2084 1509
08-04 61° 77° 6306 4688 3154 2103 1523
08-05 59° 81° 6354 4726 3182 2123 1538
08-06 66° 81° 6405 4767 3213 2146 1556
08-07 69° 83° 6460 4811 3247 2172 1577
08-08 72° 89° 6518 4860 3286 2203 1603
08-09 72° 82° 6573 4905 3321 2230 1625
08-10 70° 81° 6627 4948 3354 2255 1645
08-11 64° 80° 6677 4988 3385 2277 1662
08-12 67° 83° 6730 5032 3418 2302 1683
08-13 60° 80° 6778 5070 3446 2322 1698
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 63° 82° 6829 5110 3477 2345 1715
08-15 67° 87° 6884 5156 3512 2372 1738
08-16 72° 92° 6944 5206 3552 2404 1765
08-17 73° 93° 7005 5256 3593 2437 1792
08-18 70° 85° 7061 5302 3628 2465 1815
08-19 67° 86° 7115 5347 3663 2492 1837
08-20 67° 85° 7169 5391 3697 2518 1858
08-21 65° 81° 7220 5432 3728 2540 1876
08-22 61° 81° 7269 5471 3757 2561 1892
08-23 62° 73° 7314 5506 3782 2579 1904
08-24 53° 72° 7355 5536 3803 2591 1911
08-25 48° 71° 7392 5564 3820 2601 1916
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 46° 74° 7431 5592 3839 2611 1921
08-27 56° 79° 7476 5628 3864 2628 1934
08-28 56° 82° 7523 5664 3891 2647 1947
08-29 59° 83° 7571 5703 3919 2668 1963
08-30 61° 79° 7620 5741 3948 2688 1978
08-31 64° 77° 7668 5780 3976 2709 1994
09-01 58° 77° 7714 5815 4002 2726 2006
09-02 53° 79° 7758 5850 4026 2742 2018
09-03 54° 68° 7797 5879 4045 2754 2024
09-04 44° 71° 7833 5904 4061 2761 2026
09-05 50° 64° 7868 5929 4076 2768 2028
09-06 42° 64° 7899 5951 4087 2771 2028
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 40° 71° 7933 5975 4101 2777 2029
09-08 50° 79° 7975 6007 4123 2792 2039
09-09 57° 76° 8020 6041 4148 2808 2050
09-10 58° 83° 8069 6080 4176 2829 2066
09-11 58° 85° 8118 6120 4206 2851 2082
09-12 63° 85° 8170 6162 4238 2874 2101
09-13 67° 96° 8230 6211 4278 2906 2128
09-14 65° 91° 8286 6257 4314 2934 2151
09-15 70° 90° 8344 6306 4352 2964 2176
09-16 66° 88° 8399 6351 4387 2991 2198
09-17 65° 77° 8448 6390 4416 3013 2215
09-18 61° 74° 8494 6426 4442 3030 2227
2025Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 64° 78° 8543 6465 4471 3052 2244
09-20 57° 75° 8588 6499 4496 3068 2255
09-21 59° 80° 8635 6537 4523 3088 2269
09-22 61° 85° 8686 6578 4554 3111 2288
09-23 60° 75° 8732 6613 4580 3128 2300
09-24 57° 79° 8777 6649 4605 3146 2313
09-25 51° 82° 8822 6683 4630 3162 2324
09-26 54° 87° 8870 6722 4658 3183 2339
09-27 57° 83° 8918 6760 4686 3203 2354
09-28 48° 84° 8962 6794 4710 3219 2366
09-29 59° 87° 9013 6835 4741 3242 2384
09-30 56° 85° 9062 6873 4770 3262 2399
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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