Historical Climate Data

Growing Season Summary
Station: 471044 BREED 6 SSE, WI

Growing Degree Day Averages
Derived from 1971-1998 Data

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 0 1 20 159 469 729 891 825 533 231 32 0 3892
GDD
Base 45		 0 0 6 87 325 579 736 670 387 131 11 0 2935
GDD
Base 50		 0 0 1 43 202 430 581 515 252 63 3 0 2095
GDD
Base 55		 0 0 0 20 111 288 426 362 142 25 0 0 1382
GDD
Base 60		 0 0 0 7 53 165 276 219 66 7 0 0 802
MGDD*
Base 50		 0 0 17 124 316 466 581 535 333 151 20 0 2550

*Modified Growing Degree Days: Base 50 Ceiling 86.

Growing Season Summary
Derived from 1971-1998 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 5/27 5/02 5/06 6/09 7/06 9/24 8/16 9/04 10/04 10/15
30 5/18 5/02 5/05 6/09 7/05 9/24 9/03 9/04 10/13 10/17
28 5/10 4/17 4/26 6/03 7/05 10/03 9/03 9/14 10/13 10/21
24 4/24 4/05 4/09 5/13 5/15 10/13 9/20 9/24 10/30 11/10
20 4/15 4/02 4/04 5/06 5/13 11/01 9/23 10/02 11/12 11/16
16 4/08 3/16 3/19 4/21 5/07 11/09 9/23 10/19 11/22 12/02

Length of Growing Season (Days)
Derived from 1971-1998 Averages

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 121 60 82 141 146
30 133 61 99 143 152
28 146 80 111 159 161
24 171 128 135 202 205
20 190 135 164 216 223
16 218 139 189 238 249