Historical Climate Data

Growing Season Summary
Station: 475479 MILWAUKEE WSO, 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 59 192 494 785 988 944 686 357 86 11 4617
GDD
Base 45		 0 2 30 106 347 635 833 789 536 225 39 3 3551
GDD
Base 50		 0 0 14 53 220 485 678 634 390 123 15 0 2616
GDD
Base 55		 0 0 5 25 125 342 523 479 253 56 4 0 1817
GDD
Base 60		 0 0 1 11 64 216 369 326 142 20 0 0 1155
MGDD*
Base 50		 0 3 33 104 271 487 662 626 406 177 38 4 2817

*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 4/26 4/03 4/10 5/12 5/16 10/18 9/22 10/05 11/04 11/19
30 4/20 4/01 4/06 5/06 5/09 10/28 9/23 10/13 11/12 11/19
28 4/13 3/26 4/03 4/23 4/29 11/02 9/23 10/20 11/12 11/22
24 4/06 3/16 3/19 4/13 4/29 11/11 10/20 10/28 11/25 12/07
20 3/20 2/21 3/14 4/09 4/11 11/20 10/24 11/04 12/07 12/15
16 3/15 2/17 2/20 3/27 4/07 11/30 11/03 11/10 12/17 12/24

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 173 135 162 201 223
30 188 139 175 213 226
28 198 166 183 220 229
24 219 193 203 243 248
20 238 209 217 270 278
16 263 219 236 285 300