Historical Climate Data

Growing Season Summary
Station: 470349 ASHLAND 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 13 111 396 644 846 793 512 208 27 1 3390
GDD
Base 45		 0 0 4 57 262 499 694 641 367 113 10 0 2528
GDD
Base 50		 0 0 0 27 156 357 542 490 236 51 3 0 1782
GDD
Base 55		 0 0 0 11 81 227 390 341 131 19 0 0 1152
GDD
Base 60		 0 0 0 3 35 120 246 204 62 6 0 0 653
MGDD*
Base 50		 0 1 13 91 263 403 543 506 311 133 18 0 2176

*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 5/30 5/10 5/17 6/23 6/26 9/23 9/03 9/10 10/07 10/08
30 5/26 4/27 5/07 6/10 6/23 9/27 9/08 9/20 10/08 10/15
28 5/18 4/21 4/29 5/31 6/11 10/01 9/16 9/21 10/21 10/27
24 5/01 4/07 4/17 5/18 5/30 10/17 9/23 10/03 11/02 11/12
20 4/18 3/24 4/06 5/08 5/30 10/28 10/10 10/13 11/11 11/12
16 4/08 3/21 3/23 4/21 5/30 11/06 10/19 10/25 11/15 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 115 87 93 134 151
30 126 94 105 149 156
28 135 110 119 169 177
24 169 126 141 190 198
20 188 152 166 217 233
16 215 152 193 228 273