Historical Climate Data

Growing Season Summary
Station: 473756 HORICON, 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 52 222 551 800 961 876 615 301 64 5 4389
GDD
Base 45		 0 0 24 128 402 651 806 722 467 183 28 2 3365
GDD
Base 50		 0 0 10 68 267 502 651 569 326 97 11 0 2462
GDD
Base 55		 0 0 3 31 157 356 496 416 202 43 2 0 1679
GDD
Base 60		 0 0 0 12 82 223 342 267 108 15 0 0 1033
MGDD*
Base 50		 0 2 33 137 333 510 637 568 377 181 34 2 2778

*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 5/03 4/08 4/14 5/16 5/25 10/02 9/20 9/22 10/13 10/22
30 4/27 4/08 4/12 5/11 5/16 10/06 9/22 9/23 10/20 11/04
28 4/23 3/28 4/06 5/06 5/13 10/11 9/22 9/24 11/04 11/10
24 4/10 3/24 3/27 4/21 4/25 10/26 9/30 10/03 11/15 11/16
20 4/04 3/07 3/18 4/12 4/22 11/07 10/19 10/24 11/24 12/08
16 3/23 2/18 3/08 4/08 4/13 11/20 10/19 11/03 12/04 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 155 127 135 174 177
30 162 139 142 184 195
28 172 140 152 208 217
24 200 171 177 223 234
20 219 194 201 246 267
16 237 209 215 271 282