Historical Climate Data

Growing Season Summary
Station: 477480 ST GERMAIN 2 SE, 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 0 14 115 418 641 803 731 451 167 23 0 3383
GDD
Base 45		 0 0 4 62 284 491 648 577 309 86 8 0 2487
GDD
Base 50		 0 0 0 30 174 346 493 423 188 36 2 0 1709
GDD
Base 55		 0 0 0 13 93 214 340 274 97 12 0 0 1060
GDD
Base 60		 0 0 0 5 42 111 199 147 43 2 0 0 561
MGDD*
Base 50		 0 0 11 83 257 381 498 439 243 92 12 0 2032

*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 4/29 5/09 6/04 6/22 9/25 9/14 9/18 10/09 10/16
30 5/12 4/26 4/30 5/25 5/30 10/03 9/21 9/23 10/16 10/20
28 5/09 4/17 4/25 5/19 5/30 10/09 9/22 9/23 10/20 10/29
24 4/26 4/04 4/09 5/06 5/06 10/22 9/24 10/04 11/11 11/16
20 4/15 3/24 4/02 5/01 5/06 11/04 10/08 10/13 11/16 11/16
16 4/08 3/24 3/25 4/17 4/21 11/10 10/19 10/25 11/18 11/30

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 128 94 105 147 161
30 142 125 131 161 175
28 155 131 133 174 177
24 182 141 162 211 217
20 205 155 175 221 232
16 216 192 198 232 250