Historical Climate Data

Growing Season Summary
Station: 476922 RACINE, WI

Growing Degree Day Averages
Derived from 1971-2000 Data

 

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 2 7 48 172 454 744 960 945 685 357 95 11 4329
GDD
Base 45		 0 1 22 88 306 596 806 791 536 224 42 3 3288
GDD
Base 50		 0 0 8 40 181 448 652 637 391 120 16 0 2392
GDD
Base 55		 0 0 2 16 94 306 498 483 254 51 4 0 1634
GDD
Base 60		 0 0 0 5 43 183 345 330 140 16 0 0 1012
MGDD*
Base 50		 1 3 28 82 224 450 638 629 404 168 37 5 2568

*Modified Growing Degree Days: Base 50 Ceiling 86.

Growing Season Summary
Derived from 1971-2000 Averages

  Date of Last Spring Occurrence Date of First Fall Occurrence
Base
Temp
°F		 Median Early 90% 10% Late Median Early 90% 10% Late
32 4/23 4/06 4/09 5/09 5/13 10/19 10/04 10/08 11/04 11/18
30 4/20 3/24 4/05 5/07 5/13 11/01 10/10 10/18 11/14 11/20
28 4/10 3/22 3/27 4/24 4/29 11/03 10/16 10/23 11/15 11/20
24 4/05 3/08 3/14 4/12 4/24 11/10 10/20 10/31 11/26 12/21
20 3/21 2/17 3/06 4/08 4/11 11/21 11/03 11/07 12/10 12/21
16 3/16 2/10 2/20 4/02 4/07 11/25 11/03 11/09 12/17 12/24

Length of Growing Season (Days)
Derived from 1971-2000 Averages

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 180 150 166 202 225
30 193 165 174 222 225
28 207 189 193 225 234
24 221 193 208 256 282
20 241 218 219 276 284
16 262 222 231 284 286