Historical Climate Data

Growing Season Summary
Station: 475120 MARSHFIELD EXP FARM, 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 1 34 199 530 772 931 871 574 265 39 1 4193
GDD
Base 45		 0 0 14 111 381 622 776 716 427 154 15 0 3196
GDD
Base 50		 0 0 5 54 246 472 621 561 289 77 4 0 2314
GDD
Base 55		 0 0 1 23 139 327 466 406 173 31 0 0 1556
GDD
Base 60		 0 0 0 7 68 197 313 258 89 9 0 0 935
MGDD*
Base 50		 0 0 23 135 332 492 611 564 352 161 22 1 2680

*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 5/13 4/17 4/27 5/26 6/11 9/25 9/04 9/20 10/10 10/22
30 5/06 4/04 4/20 5/16 5/26 10/03 9/18 9/21 10/14 10/22
28 4/30 3/24 4/06 5/15 5/26 10/06 9/20 9/23 10/22 11/01
24 4/13 3/24 3/31 4/27 5/07 10/19 9/22 10/03 11/12 11/16
20 4/07 3/18 3/21 4/15 4/18 11/03 9/29 10/13 11/14 11/22
16 4/01 3/06 3/15 4/12 4/16 11/12 10/18 10/26 11/27 12/20

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 138 104 120 157 177
30 151 128 133 174 181
28 160 128 138 188 212
24 190 150 158 217 233
20 211 177 190 229 242
16 222 194 208 255 278