About Climate Summary Tables

Growing Season Summary for Station USW00014837 - MADISON DANE COUNTY REGIONAL AP, WI

Growing season summary by month
Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 1 7 69 237 573 852 999 933 671 325 78 9 4753
GDD
Base 45		 0 2 31 130 409 690 832 766 510 199 35 3 3606
GDD
Base 50		 0 0 15 65 272 540 677 611 366 109 12 1 2668
GDD
Base 60		 0 0 3 10 83 254 368 304 133 20 1 0 1174
MGDD*
Base 50		 1 4 42 140 336 545 667 610 406 178 40 4 2972

*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 05-13 04-19 05-30 04-26 06-21 . 09-29 09-15 10-13 09-16 10-25
32 05-03 04-16 05-21 04-22 05-30 . 10-06 09-15 10-16 09-22 11-09
28 04-20 03-27 05-06 04-02 05-18 . 10-17 09-23 10-29 09-30 11-11
24 04-05 03-09 04-15 03-24 04-20 . 11-01 10-02 11-11 10-12 11-19
20 03-29 03-05 04-09 03-17 04-15 . 11-12 10-18 11-30 10-31 12-09
16 03-22 02-01 04-08 03-06 04-13 . 11-25 11-03 12-09 11-08 12-21

 

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
36 138 94 115 159 170
32 154 125 139 178 179
28 178 151 155 205 213
24 212 175 188 226 231
20 226 199 211 259 267
16 245 213 218 270 280