Historical Climate Data

Growing Season Summary
Station: 470124 ALMA DAM 4, 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 4 52 263 620 858 1023 951 664 335 56 3 4761
GDD
Base 45		 0 1 22 157 467 708 868 797 515 210 23 1 3714
GDD
Base 50		 0 0 7 83 321 558 713 643 370 114 8 0 2776
GDD
Base 55		 0 0 2 38 195 410 559 489 238 52 2 0 1953
GDD
Base 60		 0 0 0 14 101 268 404 337 132 18 0 0 1254
MGDD*
Base 50		 0 2 28 153 371 560 697 636 400 179 28 1 3014

*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 4/22 4/04 4/09 5/11 5/17 10/06 9/20 9/25 11/01 11/03
30 4/19 3/24 4/06 5/05 5/11 10/14 9/20 9/29 11/01 11/04
28 4/13 3/23 3/28 5/05 5/10 10/21 9/20 10/02 11/03 11/09
24 4/06 3/21 3/24 4/17 5/06 11/03 10/02 10/21 11/13 11/22
20 3/29 3/07 3/17 4/11 4/13 11/12 10/20 10/30 11/25 12/20
16 3/19 2/26 3/07 4/07 4/09 11/20 11/01 11/05 12/11 12/20

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 164 126 148 192 207
30 182 134 148 198 225
28 192 141 150 209 225
24 211 177 188 229 234
20 224 194 213 243 279
16 247 214 219 276 282