Growing Degree Days

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​January 1 to May 24, 2023​​​​​​​​​

​Location​​
​Mod 50°F
Corn development, 
Codling moth, 
European corn borer​​
​2022 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
517
450
457
543
1016
420
349
714
1013
1113
Lone Rock
459
394
472
909
357
294
615
896
996
Beloit
482
425
448
500
966
378
311
655
954
1059
Sullivan
431
381
450
876
336
276
595
864
969
Madison
438
388
439
464
873
356
294
610
872
967
Juneau
407
355
​
425
813
317
261
563
805
900
Racine377
346
398
832
288
231
551
833
942
Waukesha398
344
417
826
306
250
560
818
921
Milwaukee
404
342
338
421
839
307
251
564
832
938
Hartford
390
338
366
410
793
304
249
547
786
886
Appleton
366
310
352
387
723
288
235
519
724
801
Green Bay361
306
344
383
722
285
232
517
722
796
Big Flats​
384
346
398
781
298
242
525
757
860
Ha​ncock
361
323
393
373
733
273
220
495
712
810
P​t Edwards
360
322
379
728
287
231
509
717
805
La Crosse448
372
491
484
897
392
330
639
893
992
Eau Claire409
316
416
438
767
351
291
581
771
841
Cumberland
301
252
324
325
592
245
196
449
605
660
Bayfield
251
198
254
493
170
125
359
498
556
Wausau310
265
354
318
603
233
183
434
602
675
Medford
299
244
313
311
582
230
180
432
589
655
Crivitz333
274
332
659
234
189
441
642
729
Crandon
281
232
284
539
198
153
390
543
607
​Key​ to GDD calculation methods: Modified B50°F; 2022 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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