About Climate Summary Tables

Growing Season Summary for Station USW00014839 - MILWAUKEE MITCHELL AIRPORT, WI

Growing season summary by month
Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 5 10 71 205 518 814 1018 987 735 392 109 16 4880
GDD
Base 45		 1 4 35 121 381 678 877 845 599 270 59 5 3874
GDD
Base 50		 0 1 17 60 249 528 722 690 450 159 25 1 2902
GDD
Base 60		 0 0 3 11 76 249 412 380 186 33 2 0 1354
MGDD*
Base 50		 2 5 38 102 275 504 685 660 438 188 44 5 2946

*Modified Growing Degree Days: Base 50 Ceiling 86.

Growing Season Summary - Derived from 1991-2020 Averages
  DATE OF LAST SPRING OCCURRENCE   DATE OF FIRST FALL OCCURRENCE
Base
Temp °F		 Median Early 90% 10% Late . Median Early 90% 10% Late
36 04-29 04-11 05-15 04-17 05-22 . 10-12 09-22 10-27 10-01 11-12
32 04-22 03-29 05-04 04-09 05-16 . 10-22 09-23 11-08 10-05 11-19
28 04-04 03-09 04-18 03-23 04-23 . 11-07 10-19 11-19 10-22 12-03
24 03-30 03-05 04-09 03-16 04-16 . 11-13 11-01 11-30 11-02 12-09
20 03-15 02-21 03-28 03-04 04-09 . 11-21 11-02 12-13 11-07 12-24
16 03-08 02-13 03-21 02-17 03-27 . 12-01 11-04 12-17 11-10 12-25

 

Length of Growing Season (Days) - Derived from 1991-2020 Normals
*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding
Base
Temp °F		 Median Shortest 10% 90% Longest
36 169 142 146 181 198
32 182 155 161 208 222
28 217 187 192 237 248
24 231 200 213 253 261
20 248 217 220 274 279
16 268 234 244 295 297