Historical Climate Data

Growing Season Summary
Station: 470645 BEAVER DAM, 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 57 238 575 829 980 909 649 329 65 5 4629
GDD
Base 45		 0 0 27 138 423 679 825 754 500 205 29 1 3574
GDD
Base 50		 0 0 12 71 282 529 670 599 355 113 10 0 2637
GDD
Base 55		 0 0 4 33 166 381 515 445 223 51 2 0 1819
GDD
Base 60		 0 0 1 13 83 242 360 293 120 18 0 0 1133
MGDD*
Base 50		 0 2 37 149 352 534 656 596 398 194 34 2 2950

*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 5/02 4/08 4/20 5/19 5/26 10/06 9/23 9/24 10/17 10/22
30 4/25 3/27 4/07 5/13 5/17 10/12 9/23 9/25 10/27 11/09
28 4/20 3/27 4/03 5/03 5/07 10/20 9/23 10/02 11/04 11/10
24 4/08 3/21 3/25 4/19 5/03 11/01 10/03 10/14 11/13 11/16
20 4/01 3/06 3/18 4/10 4/16 11/08 10/19 10/22 11/26 12/08
16 3/22 2/21 3/07 4/07 4/09 11/22 10/31 11/08 12/08 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 158 127 135 177 179
30 164 139 144 200 213
28 183 139 157 205 214
24 204 178 188 223 237
20 219 194 205 248 266
16 245 217 218 274 283