Historical Climate Data

Growing Season Summary
Station: 479190 WHITEWATER, 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		 1 7 66 242 571 834 986 917 659 342 82 9 4657
GDD
Base 45		 0 1 33 144 420 684 831 762 510 218 40 3 3601
GDD
Base 50		 0 0 15 78 282 535 676 607 366 124 17 1 2665
GDD
Base 55		 0 0 6 39 169 389 521 453 237 60 5 0 1853
GDD
Base 60		 0 0 1 18 91 252 367 304 136 23 0 0 1176
MGDD*
Base 50		 0 4 43 157 356 542 658 606 413 207 45 4 2998

*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 5/10 4/20 4/25 5/29 6/08 10/04 9/17 9/22 10/18 11/03
30 5/05 4/09 4/12 5/28 6/08 10/08 9/19 9/23 10/26 11/03
28 4/26 3/26 4/10 5/09 5/11 10/11 9/22 9/26 11/04 11/11
24 4/11 3/25 4/02 4/27 5/06 10/31 10/02 10/11 11/12 11/20
20 4/05 3/07 3/19 4/16 4/25 11/08 10/14 10/20 11/23 11/29
16 3/23 2/18 3/04 4/09 4/09 11/21 10/20 11/03 12/03 12/22

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 147 126 134 166 182
30 156 126 135 180 204
28 174 139 148 198 213
24 199 167 186 216 225
20 217 188 200 245 258
16 247 194 218 268 280