Welcome!

It appears to be your first time visiting GDDTracker
Please enter your zip code for a customized experience. Also, be sure and watch our video introduction video.

   
       

MSU Proxy/Primo Seedhead Timer (GDD 32)
through Mon, Jun. 5. 2023

 
  

Valparaiso, IN

        

Generously Supported By:



Tabular Data

Daily GDD accumulation for various base temperature models in 2023 & 2022

2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 37° 53° 23 13 3 0 0
02-16 30° 39° 35 15 3 0 0
02-17 19° 30° 38 15 3 0 0
02-18 19° 44° 47 15 3 0 0
02-19 35° 53° 69 28 5 0 0
02-20 32° 48° 87 35 5 0 0
02-21 29° 38° 98 37 5 0 0
02-22 32° 35° 110 38 5 0 0
02-23 27° 47° 125 43 5 0 0
02-24 21° 29° 128 43 5 0 0
02-25 26° 36° 138 43 5 0 0
02-26 25° 49° 153 49 5 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 36° 58° 178 63 10 0 0
02-28 37° 49° 199 75 11 0 0
03-01 35° 58° 223 89 16 0 0
03-02 32° 41° 238 94 16 0 0
03-03 31° 38° 250 96 16 0 0
03-04 27° 42° 263 99 16 0 0
03-05 29° 50° 280 106 16 0 0
03-06 40° 52° 304 120 19 0 0
03-07 33° 44° 321 127 19 0 0
03-08 32° 47° 338 134 19 0 0
03-09 33° 43° 354 140 19 0 0
03-10 32° 36° 366 142 19 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 32° 41° 381 147 19 0 0
03-12 30° 35° 392 148 19 0 0
03-13 25° 32° 398 148 19 0 0
03-14 23° 33° 404 148 19 0 0
03-15 19° 47° 415 149 19 0 0
03-16 36° 48° 434 158 19 0 0
03-17 28° 50° 451 165 19 0 0
03-18 14° 27° 451 165 19 0 0
03-19 16° 37° 456 165 19 0 0
03-20 24° 48° 470 169 19 0 0
03-21 33° 52° 490 179 20 0 0
03-22 38° 49° 512 191 22 0 0
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 35° 50° 532 202 22 0 0
03-24 34° 47° 551 210 22 0 0
03-25 34° 41° 566 215 22 0 0
03-26 31° 54° 587 226 23 0 0
03-27 32° 43° 603 232 23 0 0
03-28 27° 49° 619 238 23 0 0
03-29 28° 43° 633 242 23 0 0
03-30 23° 54° 649 248 23 0 0
03-31 49° 65° 684 274 38 7 2
04-01 34° 54° 706 286 40 7 2
04-02 29° 54° 726 295 40 7 2
04-03 39° 64° 755 315 49 9 2
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 48° 67° 791 340 65 16 5
04-05 40° 72° 825 364 79 22 6
04-06 34° 50° 845 374 79 22 6
04-07 33° 53° 866 385 80 22 6
04-08 36° 61° 892 401 86 22 6
04-09 39° 65° 923 422 97 25 6
04-10 42° 68° 956 445 110 30 6
04-11 46° 76° 995 474 129 41 12
04-12 53° 81° 1040 509 154 58 24
04-13 51° 81° 1084 543 178 74 35
04-14 50° 81° 1127 576 201 89 45
04-15 60° 80° 1175 614 229 109 61
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 37° 67° 1205 634 239 111 61
04-17 30° 39° 1218 637 239 111 61
04-18 32° 57° 1240 649 242 111 61
04-19 38° 77° 1276 675 257 119 63
04-20 60° 80° 1324 713 285 139 78
04-21 46° 61° 1355 735 297 143 78
04-22 37° 51° 1378 747 299 143 78
04-23 35° 43° 1394 753 299 143 78
04-24 30° 51° 1413 762 299 143 78
04-25 36° 49° 1433 772 299 143 78
04-26 32° 51° 1452 782 299 143 78
04-27 32° 65° 1479 798 306 143 78
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 45° 57° 1507 817 315 143 78
04-29 37° 65° 1537 836 324 145 78
04-30 38° 48° 1558 847 325 145 78
05-01 39° 45° 1578 857 325 145 78
05-02 41° 50° 1601 870 328 145 78
05-03 40° 50° 1625 884 332 145 78
05-04 36° 69° 1655 905 343 147 78
05-05 48° 75° 1695 934 362 159 85
05-06 57° 77° 1740 969 387 176 97
05-07 64° 82° 1791 1011 418 199 115
05-08 54° 65° 1829 1038 436 209 120
05-09 48° 70° 1866 1065 453 218 123
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 46° 78° 1906 1095 473 230 130
05-11 53° 83° 1952 1131 499 248 143
05-12 66° 80° 2002 1172 529 270 161
05-13 64° 74° 2049 1209 557 289 175
05-14 59° 66° 2090 1239 577 302 183
05-15 51° 68° 2127 1267 595 311 187
05-16 47° 77° 2167 1297 614 323 194
05-17 46° 67° 2202 1321 629 330 196
05-18 42° 73° 2238 1347 645 338 198
05-19 56° 73° 2280 1379 667 352 208
05-20 46° 63° 2312 1402 680 356 208
05-21 46° 78° 2352 1432 699 368 215
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 50° 79° 2395 1464 722 383 225
05-23 55° 83° 2442 1502 749 402 239
05-24 56° 74° 2485 1534 772 417 249
05-25 46° 64° 2518 1557 785 422 249
05-26 42° 71° 2553 1582 800 429 250
05-27 44° 77° 2591 1611 819 439 256
05-28 53° 80° 2636 1645 843 456 267
05-29 55° 84° 2683 1682 870 475 282
05-30 60° 88° 2736 1725 903 500 301
05-31 66° 89° 2791 1770 938 527 323
06-01 65° 88° 2846 1815 973 554 345
06-02 64° 91° 2901 1861 1008 581 368
2023Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 64° 88° 2955 1904 1042 607 389
06-04 62° 80° 3004 1944 1071 628 405
06-05 51° 82° 3049 1978 1096 645 416
06-06 57° 75° 3093 2012 1120 661 427
06-07 55° 76° 3136 2045 1143 676 437
06-08 48° 75° 3176 2075 1163 688 444
06-09 49° 79° 3218 2107 1185 702 453
06-10 56° 86° 3267 2146 1214 723 469
06-11 59° 73° 3311 2180 1238 739 480
06-12 51° 76° 3352 2212 1259 752 489
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-15 17° 36° 5 0 0 0 0
02-16 38° 54° 29 14 4 0 0
02-17 22° 51° 43 18 4 0 0
02-18 7° 31° 43 18 4 0 0
02-19 11° 32° 43 18 4 0 0
02-20 13° 46° 51 18 4 0 0
02-21 33° 53° 72 30 5 0 0
02-22 27° 52° 89 37 5 0 0
02-23 20° 26° 91 37 5 0 0
02-24 23° 29° 95 37 5 0 0
02-25 19° 28° 97 37 5 0 0
02-26 13° 31° 97 37 5 0 0
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
02-27 23° 43° 108 38 5 0 0
02-28 24° 50° 123 44 5 0 0
03-01 32° 48° 141 52 5 0 0
03-02 27° 59° 162 63 6 0 0
03-03 27° 34° 171 63 6 0 0
03-04 23° 44° 182 64 6 0 0
03-05 38° 70° 214 86 18 4 0
03-06 37° 62° 242 104 25 4 0
03-07 32° 37° 254 106 25 4 0
03-08 29° 38° 265 107 25 4 0
03-09 26° 47° 279 111 25 4 0
03-10 24° 32° 285 111 25 4 0
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-11 19° 30° 287 111 25 4 0
03-12 11° 21° 287 111 25 4 0
03-13 17° 52° 300 114 25 4 0
03-14 36° 61° 326 130 32 4 0
03-15 34° 56° 350 144 35 4 0
03-16 35° 68° 379 163 45 6 0
03-17 45° 72° 416 190 61 14 4
03-18 44° 53° 442 206 68 14 4
03-19 38° 48° 463 217 69 14 4
03-20 33° 62° 488 232 74 14 4
03-21 39° 73° 522 256 88 20 4
03-22 48° 57° 553 277 98 23 4
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
03-23 48° 60° 585 299 110 27 4
03-24 41° 47° 607 311 112 27 4
03-25 35° 45° 625 319 112 27 4
03-26 26° 35° 634 319 112 27 4
03-27 24° 30° 639 319 112 27 4
03-28 18° 32° 641 319 112 27 4
03-29 24° 42° 653 320 112 27 4
03-30 40° 63° 682 340 122 28 4
03-31 34° 57° 705 353 125 28 4
04-01 31° 41° 720 357 125 28 4
04-02 30° 46° 736 363 125 28 4
04-03 33° 49° 755 373 125 28 4
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-04 41° 54° 781 388 131 28 4
04-05 31° 59° 804 401 134 28 4
04-06 46° 55° 832 420 143 29 4
04-07 39° 45° 852 430 143 29 4
04-08 33° 42° 867 435 143 29 4
04-09 32° 44° 883 441 143 29 4
04-10 30° 61° 907 454 146 29 4
04-11 47° 58° 937 475 156 31 4
04-12 35° 70° 968 495 167 34 4
04-13 48° 68° 1004 521 183 42 7
04-14 35° 53° 1025 533 185 42 7
04-15 40° 59° 1053 551 192 42 7
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-16 34° 48° 1072 560 192 42 7
04-17 29° 46° 1088 565 192 42 7
04-18 31° 39° 1101 569 192 42 7
04-19 34° 46° 1119 577 192 42 7
04-20 36° 54° 1142 590 196 42 7
04-21 50° 69° 1179 617 213 51 12
04-22 46° 61° 1211 639 225 55 12
04-23 49° 84° 1256 674 249 72 23
04-24 65° 75° 1304 711 277 91 38
04-25 42° 62° 1334 732 287 94 38
04-26 36° 50° 1355 743 288 94 38
04-27 31° 42° 1369 747 288 94 38
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
04-28 35° 51° 1390 758 290 94 38
04-29 45° 66° 1424 782 303 99 39
04-30 49° 73° 1463 811 322 110 45
05-01 50° 59° 1496 834 335 115 45
05-02 48° 56° 1526 854 346 118 45
05-03 43° 53° 1553 870 352 118 45
05-04 43° 57° 1581 889 360 118 45
05-05 41° 56° 1608 905 367 118 45
05-06 49° 53° 1637 924 376 119 45
05-07 44° 66° 1670 947 389 124 45
05-08 41° 66° 1701 969 401 128 45
05-09 52° 81° 1746 1004 425 144 57
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-10 66° 88° 1801 1049 460 171 79
05-11 72° 89° 1860 1097 499 202 104
05-12 69° 89° 1917 1145 536 231 128
05-13 61° 89° 1970 1187 569 256 148
05-14 62° 81° 2019 1227 598 277 165
05-15 56° 76° 2063 1261 622 293 176
05-16 52° 76° 2105 1293 644 307 185
05-17 50° 68° 2142 1320 661 316 189
05-18 56° 66° 2181 1349 680 327 195
05-19 51° 84° 2227 1384 706 345 207
05-20 65° 86° 2280 1428 739 370 228
05-21 56° 65° 2318 1456 758 381 233
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
05-22 49° 60° 2351 1479 770 385 233
05-23 43° 64° 2382 1500 781 388 233
05-24 46° 70° 2418 1526 798 397 236
05-25 58° 83° 2467 1565 826 417 252
05-26 66° 77° 2516 1604 855 438 268
05-27 50° 65° 2552 1629 871 446 270
05-28 44° 74° 2589 1656 888 455 274
05-29 60° 84° 2639 1696 918 477 291
05-30 67° 88° 2694 1742 953 504 314
05-31 72° 91° 2754 1791 993 536 341
06-01 60° 78° 2801 1828 1020 555 355
06-02 58° 75° 2845 1863 1045 572 366
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-03 54° 81° 2891 1898 1070 589 379
06-04 48° 76° 2931 1928 1090 601 385
06-05 61° 82° 2980 1968 1119 622 402
06-06 64° 80° 3030 2008 1149 644 419
06-07 56° 66° 3069 2037 1169 656 425
06-08 54° 69° 3109 2066 1188 667 431
06-09 53° 76° 3151 2099 1210 681 441
06-10 53° 79° 3195 2133 1234 697 452
06-11 54° 74° 3237 2164 1256 711 461
06-12 62° 76° 3284 2202 1283 730 475
06-13 60° 91° 3338 2245 1317 756 495
06-14 76° 95° 3401 2299 1360 791 526
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-15 76° 94° 3464 2352 1403 826 556
06-16 74° 94° 3526 2404 1445 860 585
06-17 68° 83° 3580 2447 1479 886 606
06-18 56° 71° 3621 2479 1500 899 614
06-19 49° 83° 3665 2513 1524 915 625
06-20 59° 92° 3718 2556 1557 940 645
06-21 65° 96° 3777 2605 1596 971 671
06-22 73° 88° 3835 2653 1635 1002 696
06-23 61° 82° 3885 2693 1664 1023 713
06-24 54° 89° 3935 2732 1694 1045 729
06-25 60° 78° 3982 2769 1721 1064 743
06-26 67° 79° 4032 2810 1752 1087 761
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
06-27 56° 75° 4076 2844 1775 1102 772
06-28 50° 83° 4121 2878 1800 1119 783
06-29 62° 87° 4173 2921 1832 1143 803
06-30 65° 90° 4229 2967 1868 1171 826
07-01 65° 84° 4282 3009 1901 1196 845
07-02 60° 81° 4330 3048 1929 1216 861
07-03 58° 85° 4380 3088 1959 1238 878
07-04 63° 88° 4433 3131 1992 1263 898
07-05 69° 96° 4493 3181 2033 1296 925
07-06 71° 80° 4547 3225 2066 1321 946
07-07 67° 83° 4601 3268 2100 1347 966
07-08 73° 77° 4653 3311 2133 1372 986
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-09 66° 80° 4704 3352 2164 1395 1004
07-10 56° 84° 4752 3390 2191 1414 1019
07-11 62° 85° 4803 3431 2222 1437 1037
07-12 67° 84° 4857 3474 2256 1463 1057
07-13 63° 82° 4907 3515 2286 1485 1075
07-14 56° 80° 4953 3551 2312 1503 1088
07-15 58° 72° 4996 3584 2335 1518 1098
07-16 67° 80° 5048 3626 2367 1542 1117
07-17 70° 76° 5099 3667 2398 1565 1135
07-18 68° 87° 5154 3712 2434 1593 1157
07-19 67° 87° 5209 3757 2468 1619 1179
07-20 74° 89° 5269 3806 2508 1651 1205
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
07-21 67° 90° 5325 3853 2544 1679 1229
07-22 68° 89° 5382 3899 2581 1708 1253
07-23 67° 82° 5434 3942 2613 1732 1272
07-24 71° 83° 5489 3987 2648 1759 1294
07-25 65° 77° 5538 4025 2677 1780 1309
07-26 59° 80° 5585 4062 2704 1799 1324
07-27 69° 83° 5639 4106 2738 1825 1345
07-28 63° 82° 5689 4147 2769 1848 1362
07-29 57° 79° 5735 4183 2795 1866 1375
07-30 56° 81° 5782 4220 2821 1884 1389
07-31 59° 82° 5831 4259 2850 1905 1405
08-01 69° 86° 5886 4304 2885 1932 1427
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-02 63° 84° 5938 4345 2917 1956 1445
08-03 69° 91° 5996 4393 2955 1986 1471
08-04 70° 84° 6051 4438 2990 2013 1492
08-05 72° 84° 6107 4484 3026 2041 1515
08-06 70° 89° 6164 4532 3064 2071 1540
08-07 73° 81° 6220 4577 3099 2098 1562
08-08 67° 85° 6274 4621 3133 2124 1583
08-09 61° 74° 6319 4657 3158 2141 1596
08-10 53° 81° 6365 4692 3184 2159 1608
08-11 63° 78° 6413 4731 3213 2180 1624
08-12 53° 77° 6457 4764 3236 2195 1634
08-13 56° 77° 6501 4799 3261 2212 1646
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-14 64° 74° 6548 4836 3288 2231 1660
08-15 61° 78° 6596 4874 3315 2250 1675
08-16 58° 81° 6643 4911 3343 2270 1689
08-17 57° 81° 6690 4948 3369 2288 1703
08-18 56° 82° 6737 4985 3396 2307 1717
08-19 60° 84° 6787 5025 3426 2329 1734
08-20 65° 79° 6836 5064 3456 2351 1750
08-21 63° 77° 6884 5102 3484 2371 1765
08-22 64° 80° 6934 5142 3513 2392 1782
08-23 56° 82° 6981 5179 3540 2411 1796
08-24 57° 84° 7030 5217 3569 2432 1812
08-25 59° 79° 7077 5255 3596 2451 1826
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
08-26 62° 78° 7125 5293 3625 2472 1841
08-27 56° 83° 7173 5330 3652 2491 1856
08-28 64° 89° 7227 5375 3686 2517 1877
08-29 70° 85° 7283 5420 3722 2545 1899
08-30 64° 80° 7332 5460 3752 2567 1916
08-31 56° 83° 7380 5497 3779 2586 1931
09-01 62° 86° 7432 5539 3811 2610 1949
09-02 64° 83° 7483 5581 3843 2634 1968
09-03 65° 80° 7534 5622 3873 2656 1986
09-04 68° 73° 7582 5660 3901 2676 2001
09-05 64° 73° 7629 5696 3928 2695 2014
09-06 65° 79° 7678 5736 3957 2716 2031
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-07 60° 77° 7725 5773 3984 2735 2045
09-08 52° 82° 7770 5808 4009 2752 2057
09-09 52° 82° 7815 5843 4034 2769 2069
09-10 57° 83° 7863 5881 4063 2790 2084
09-11 60° 69° 7906 5914 4085 2804 2094
09-12 53° 59° 7940 5937 4099 2810 2095
09-13 50° 73° 7979 5967 4118 2821 2101
09-14 51° 79° 8021 5999 4141 2836 2110
09-15 56° 81° 8068 6035 4167 2854 2124
09-16 57° 82° 8115 6073 4194 2873 2138
09-17 62° 84° 8166 6114 4225 2896 2156
09-18 66° 84° 8219 6157 4258 2921 2176
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55
09-19 60° 77° 8266 6193 4285 2940 2189
09-20 57° 88° 8316 6234 4315 2962 2207
09-21 67° 87° 8371 6279 4351 2990 2229
09-22 53° 65° 8409 6306 4368 2999 2233
09-23 40° 63° 8438 6326 4377 3000 2233
09-24 52° 74° 8479 6357 4398 3013 2242
09-25 54° 67° 8518 6385 4417 3024 2247
09-26 49° 61° 8550 6408 4430 3029 2247
09-27 45° 58° 8580 6428 4439 3030 2247
09-28 48° 59° 8611 6449 4450 3033 2247
09-29 37° 64° 8640 6467 4459 3034 2247
09-30 39° 66° 8670 6488 4470 3037 2247
2022Lo
(F)		Hi
(F)		GDD
22		GDD
32		GDD
42		GDD
50		GDD
55

 

Latest Updates

February 16th, 2023Welcome to the 2023 GDD Tracking Season

The roller coaster of late winter and early spring has begun in Michigan. Near 60°F a few days ago and now snow in the forecast once again. Despite the variable low and high temperatures for this time of year, 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 2023!
 

 

© Copyright 2004-2023, Department of Crop and Soil Sciences, Michigan State University.
Weather data and programming assistance provided by Enviro-Weather and NWS
All Rights Reserved. Custom web development by Dynamite Inc.