Historical Climate Data

Growing Season Summary
Station: 470882 BLAIR, 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 2 40 201 520 772 925 864 560 247 40 1 4177
GDD
Base 45		 0 0 17 115 373 622 771 709 415 144 15 0 3186
GDD
Base 50		 0 0 6 58 242 473 617 554 280 73 5 0 2311
GDD
Base 55		 0 0 1 27 138 329 463 400 168 31 0 0 1561
GDD
Base 60		 0 0 0 11 67 201 312 253 86 10 0 0 945
MGDD*
Base 50		 0 2 30 144 331 495 609 561 353 169 29 2 2730

*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 5/17 4/29 5/03 6/06 6/22 9/23 9/03 9/09 10/09 10/14
30 5/11 4/15 4/28 5/27 6/11 9/30 9/03 9/21 10/09 10/14
28 5/06 4/08 4/16 5/21 6/11 10/03 9/19 9/23 10/15 10/21
24 4/22 3/26 4/07 5/07 5/13 10/16 9/26 10/04 11/02 11/05
20 4/10 3/23 3/26 4/20 4/22 10/31 10/02 10/09 11/07 11/11
16 4/05 3/16 3/21 4/13 4/20 11/08 10/10 10/19 11/22 12/07

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 130 89 107 149 155
30 140 112 120 156 165
28 151 112 134 174 178
24 180 149 158 200 210
20 202 174 184 215 225
16 217 180 194 241 261