Historical Climate Data

Growing Season Summary
Station: 479319 WISCONSIN DELLS, 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 5 48 206 541 788 948 879 596 278 51 5 4257
GDD
Base 45		 0 1 21 117 391 639 793 724 448 168 21 1 3255
GDD
Base 50		 0 0 8 61 256 490 638 570 308 87 7 0 2369
GDD
Base 55		 0 0 2 29 147 344 483 415 189 38 1 0 1610
GDD
Base 60		 0 0 0 12 74 211 330 266 100 13 0 0 984
MGDD*
Base 50		 0 3 36 143 338 504 629 574 365 173 31 3 2743

*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 5/11 4/21 4/29 5/29 6/20 10/03 9/19 9/22 10/16 10/29
30 5/03 4/07 4/23 5/21 5/29 10/05 9/21 9/22 10/19 10/31
28 4/29 4/08 4/13 5/11 5/20 10/09 9/22 9/24 10/31 11/03
24 4/14 3/27 4/03 4/25 5/05 10/21 10/02 10/02 11/05 11/10
20 4/08 3/21 3/23 4/16 4/18 11/04 10/02 10/14 11/14 11/25
16 3/30 3/08 3/17 4/11 4/13 11/12 10/19 10/31 12/02 12/08

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 144 95 127 157 170
30 154 121 136 173 182
28 164 135 151 183 208
24 191 150 165 213 219
20 211 173 195 231 236
16 221 204 209 257 266