Historical Climate Data

Growing Season Summary
Station: 473654 HILLSBORO SEWAGE PLANT, 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 3 46 211 534 790 946 874 588 269 48 4 4199
GDD
Base 45		 0 1 21 121 384 641 793 721 442 159 19 1 3215
GDD
Base 50		 0 0 8 62 249 493 640 569 304 81 6 0 2343
GDD
Base 55		 0 0 3 28 140 348 487 416 185 33 1 0 1592
GDD
Base 60		 0 0 0 11 67 216 336 270 97 11 0 0 975
MGDD*
Base 50		 0 2 34 147 335 509 625 570 367 174 33 2 2727

*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 5/11 3/30 4/28 5/29 6/11 10/01 9/19 9/22 10/11 10/14
30 5/05 3/30 4/22 5/18 5/27 10/04 9/20 9/22 10/12 10/15
28 4/28 3/27 4/08 5/11 5/13 10/05 9/22 9/24 10/25 11/01
24 4/14 3/24 4/01 4/23 4/28 10/20 10/02 10/04 11/07 11/16
20 4/08 3/22 3/25 4/18 4/21 11/03 10/02 10/14 11/13 11/24
16 3/26 2/22 3/04 4/09 4/18 11/11 10/20 10/30 11/30 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 140 112 120 163 187
30 151 132 136 168 188
28 162 138 143 184 191
24 188 161 172 213 225
20 204 177 190 223 234
16 225 194 213 264 279