Historical Climate Data

Growing Season Summary
Station: 470991 BOWLER RANGER STN, 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 21 151 435 649 820 740 449 187 31 0 3286
GDD
Base 45		 0 0 8 82 298 510 674 595 316 98 10 0 2441
GDD
Base 50		 0 0 2 40 183 373 528 450 198 41 2 0 1709
GDD
Base 55		 0 0 0 18 100 245 383 307 105 13 0 0 1100
GDD
Base 60		 0 0 0 8 45 135 243 178 46 3 0 0 615
MGDD*
Base 50		 0 0 17 112 282 408 530 469 273 126 20 0 2113

*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 5/26 5/02 5/12 6/09 6/11 9/23 9/03 9/10 10/04 10/15
30 5/18 5/02 5/05 6/02 6/11 9/27 9/03 9/19 10/11 10/21
28 5/09 4/17 4/30 5/19 6/11 10/03 9/20 9/23 10/16 10/31
24 4/23 4/07 4/13 5/06 5/09 10/15 9/23 9/26 11/03 11/07
20 4/14 3/23 4/05 4/24 5/01 10/30 9/23 10/06 11/11 11/16
16 4/08 3/19 3/23 4/13 4/18 11/07 10/20 10/24 11/15 11/26

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 121 97 101 139 150
30 132 106 112 147 169
28 149 121 127 168 185
24 175 139 153 199 205
20 194 152 174 213 217
16 217 194 198 233 235