Historical Climate Data

Growing Season Summary
Station: 475474 MILWAUKEE MT MARY COL, 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 9 74 254 593 869 1059 998 730 386 93 11 5054
GDD
Base 45		 0 2 38 152 441 719 904 843 580 251 44 4 3958
GDD
Base 50		 0 0 18 82 300 570 749 688 432 142 17 1 2984
GDD
Base 55		 0 0 7 39 184 422 594 534 292 68 5 0 2135
GDD
Base 60		 0 0 2 17 102 283 439 380 174 26 0 0 1418
MGDD*
Base 50		 1 4 44 148 353 562 715 671 451 205 40 4 3184

*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 4/27 4/09 4/10 5/10 5/16 10/14 9/22 10/01 10/31 11/08
30 4/21 3/26 4/05 5/04 5/09 10/22 9/23 10/09 11/11 11/15
28 4/13 3/25 4/02 4/26 5/01 11/01 10/02 10/17 11/13 11/24
24 4/06 3/16 3/24 4/13 4/18 11/09 10/20 10/24 11/20 11/29
20 3/23 3/02 3/14 4/10 4/12 11/21 10/31 11/06 12/02 12/22
16 3/14 2/09 2/22 4/01 4/07 11/25 11/03 11/10 12/16 12/22

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 166 138 153 194 212
30 187 139 167 212 219
28 200 175 181 220 231
24 217 193 203 236 249
20 237 208 218 261 281
16 258 218 226 285 293