Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to July 16​, 2025​​​​​​​​​

​Location​​
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2024 GDDs
Mod base 50F
​30-yr avg.

1991-2020


​Sine B48
Alfalfa weevil
​Mod B40
Onion maggot
​Simple B50
Flea beetles, Imported cabbageworm,​ Squash vine borer
​Simple B52
Colorado potato beetle, Corn rootworm adults
​​Simple B43
Cabbage maggot
​Sine B39
Seedcorn maggot
​​Mod B38
​Western bean cutworm
Dubuque IA
1728
1771
1469
1861
2865
1596
1406
2344
2899
2871
Lone Rock1573
1611
1667
2624
1386
1211
2093
2645
2657
​​Beloit
1585
1719
1439
1701
2661
1438
1260
2150
2684
2674
Sullivan
1490
1553
1583
2500
1315
1149
2003
2524
2543
Madison
1528
1569
1435
1631
2559
1370
1199
2065
2595
2615
Juneau
1452
1501
1540
2444
1273
1115
1944
2464
2492
Racine1402
1549
1504
2414
1263
1109
1936
2439
2464
Waukesha1393
1494
1483
2371
1227
1072
1891
2405
2444
Milwaukee1362
1526
1292
1460
2350
1218
1067
1871
2372
2409
Hartford
1391
1431
1268
1479
2361
1221
1070
1880
2389
2425
Appleton1307
1432
1294
1404
2261
1172
1021
1800
2293
2339
Green Bay1316
1412
1257
1416
2275
1183
1034
1819
2303
2337
Big Flats​1403
1430
1480
2368
1206
1052
1861
2377
2425
Ha​ncock​1328
1350
1318
1406
2271
1146
996
1777
2280
2334
P​t Edwards1347
1340
1428
2295
1169
1016
1805
2307
2356
La Crosse1567
1535
1574
1672
2621
1407
1232
2108
2654
2685
Eau Claire1427
1417
1377
1526
2141
1276
1114
1934
2442
2469
Cumberland
1216
1184
1215
1301
2125
1063
917
1666
2151
2216
Bayfield1049
930
1099
1846
872
743
1396
1843
1927
Wausau1163
1161
1252
1231
2022
994
856
1570
2038
2118
Medford1130
1126
1139
1197
1989
963
825
1536
2007
2095
​Crivitz
1187
1235
1244
2057
991
856
1561
2047
2115
Crandon1023
1010
1075
1819
844
714
1379
1826
1929​
​Key​ to GDD calculation methods: Modified B50°F; 2024 Modified B50°F; 30-Year Average 1991-2020; Sine B48°F; Modified​ B40°F; Simple B50​​°F; Simple B52°F; Simple B43°F, Sine B39°F; Modified B38°F.   ​ ​ ​ ​ ​ ​ ​ ​ ​ 

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