Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to July 24, 2024​​​​​​​​​

​Location​​
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2023 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
1934
1797
1647
2095
3189
1794
1578
2638
3242
3262
Lone Rock1763
1645
1883
2945
1578
1372
2373
2983
3044
​​Beloit
1871
1668
1618
2024
3087
1743
1532
2549
3139
3150
Sullivan
1706
1582
1842
2860
1565
1360
2336
2912
2957
Madison
1720
1635
1615
1864
2886
1585
1379
2372
2946
2998
Juneau
1650
1542
1779
2785
1500
1296
2265
2835
2898
Racine1704
1468
1857
2876
1591
1382
2383
2937
2981
Waukesha1645
1510
1781
2784
1510
1301
2284
2847
2902
Milwaukee
1688
1544
1474
1836
2847
1569
1359
2358
2906
2944
Hartford
1578
1498
1433
1710
2698
1442
1238
2201
2758
2822
Appleton1580
1529
1470
1713
2701
1441
1239
2202
2763
2825
Green Bay1561
1504
1422
1688
2670
1410
1211
2170
2727
2781
Big Flats​
1565
1493
1657
2683
1350
1157
2097
2703
2810
Ha​ncock​1480
1455
1486
1577
2576
1283
1090
2019
2604
2711
P​t Edwards1471
1443
1562
2571
1261
1072
2004
2596
2710
La Crosse1693
1668
1767
1826
2874
1534
1331
2322
2926
3005
Eau Claire1566
1614
1549
1675
2684
1381
1193
2143
2725
2816
Cumberland
1315
1334
1378
1409
2345
1133
957
1844
2387
2513
Bayfield1033
1124
1093
1949
832
684
1450
1968
2118
Wausau1277
1293
1415
1364
2311
1083
904
1793
2346
2472
Medford
1243
1237
1291
1320
2254
1038
862
1737
2289
2426
Crivitz1358
1353
1425
2383
1124
949
1829
2396
2498
Crandon1113
1186
1180
2079
906
742
1557
2095
2250
​Key​ to GDD calculation methods: Modified B50°F; 2023 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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