Historical Climate Data

Growing Season Summary
Station: 471078 BRODHEAD 1 SW, 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		 0 5 61 235 567 831 985 911 632 308 68 7 4567
GDD
Base 45		 0 1 31 138 417 682 830 756 484 189 31 3 3533
GDD
Base 50		 0 0 14 71 280 533 675 601 341 103 13 1 2615
GDD
Base 55		 0 0 5 33 168 386 521 446 215 48 3 0 1817
GDD
Base 60		 0 0 1 14 88 249 367 296 118 18 0 0 1148
MGDD*
Base 50		 1 5 44 154 350 539 656 597 400 203 45 4 2971

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

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 151 110 126 167 169
30 157 135 138 178 188
28 167 138 146 202 216
24 195 152 174 218 226
20 216 190 197 247 249
16 232 207 217 275 280