Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to July 9​, 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
1558
1590
1316
1677
2625
1426
1250
2125
2653
2645
Lone Rock1415
1438
1494
2395
1228
1066
1886
2410
2438
​​Beloit
1421
1547
1288
1521
2425
1273
1109
1935
2442
2454
Sullivan
1329
1382
1407
2268
1153
1001
1792
2286
2325
Madison
1363
1395
1283
1453
2324
1205
1049
1851
2354
2391
Juneau
1294
1330

1367
2214
1114
969
1735
2228
2275
Racine1236
1384
1323
2177
1096
956
1720
2196
2238
Waukesha1234
1328
1309
2141
1067
926
1682
2169
2225
Milwaukee1195
1356
1135
1277
2110
1048
911
1652
2127
2185
Hartford
1233
1262
1129
1307
2132
1062
925
1672
2154
2208
Appleton1145
1253
1145
1228
2029
1009
872
1588
2053
2119
Green Bay1153
1233
1114
1237
2040
1018
883
1605
2062
2118
Big Flats​1245
1260
1308
2141
1049
908
1654
2143
2208
Ha​ncock​1175
1183
1176
1239
2048
993
857
1575
2050
2120
P​t Edwards1193
1174
1259
2070
1014
875
1600
2076
2141
La Crosse1408
1357
1410
1499
2391
1247
1086
1900
2418
2460
Eau Claire1273
1245
1227
1356
2188
1119
972
1729
2211
2251
Cumberland
1075
1028
1073
1146
1913
922
789
1475
1933
2009
Bayfield918
803
955
1645
742
627
1216
1636
1732
Wausau1020
1010
1111
1074
1809
851
727
1378
1818
1908
Medford996
981
1009
1049
1785
829
705
1353
1796
1891
​Crivitz
1046
1073
1087
1844
848
727
1369
1828
1912
Crandon899
873
938
1626
721
604
1206
1626
1735
​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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