Historical Climate Data

Growing Season Summary
Station: 477174 RIDGELAND, 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 27 179 517 750 912 839 546 236 32 1 3884
GDD
Base 45		 0 0 10 100 369 600 757 684 400 133 12 0 2946
GDD
Base 50		 0 0 3 49 236 451 602 530 266 64 4 0 2120
GDD
Base 55		 0 0 0 22 134 309 447 376 155 25 1 0 1414
GDD
Base 60		 0 0 0 8 66 183 296 232 78 8 0 0 839
MGDD*
Base 50		 0 0 21 134 333 481 598 543 339 151 21 1 2521

*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 5/20 4/25 5/04 6/09 6/22 9/24 8/28 9/14 10/08 10/14
30 5/13 4/14 4/30 6/01 6/11 9/28 9/03 9/20 10/13 10/16
28 5/06 3/30 4/22 5/19 5/21 10/04 9/20 9/23 10/17 10/22
24 4/24 3/26 4/06 5/06 5/13 10/13 9/22 10/02 11/01 11/04
20 4/09 3/20 3/28 4/24 5/01 10/29 10/02 10/12 11/06 11/16
16 4/06 3/07 3/16 4/13 4/22 11/05 10/02 10/19 11/18 11/30

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 126 87 107 143 149
30 139 104 114 159 170
28 151 129 131 166 188
24 175 139 151 201 207
20 199 161 181 216 221
16 216 177 191 237 260