Historical Climate Data

Growing Season Summary
Station: 474457 LAKE GENEVA, 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		 1 9 69 265 611 878 1053 989 718 382 91 10 5017
GDD
Base 45		 0 2 33 158 458 728 898 834 569 248 43 3 3925
GDD
Base 50		 0 0 14 84 314 578 743 679 422 143 17 1 2955
GDD
Base 55		 0 0 5 39 193 430 588 524 284 70 5 0 2107
GDD
Base 60		 0 0 1 16 105 289 433 370 170 26 0 0 1391
MGDD*
Base 50		 0 4 44 161 373 572 711 662 447 216 44 4 3201

*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 4/28 4/10 4/13 5/11 5/25 10/11 9/22 9/26 10/27 11/03
30 4/22 3/27 4/09 5/07 5/13 10/18 9/22 9/29 11/04 11/10
28 4/18 3/22 4/03 4/30 5/07 10/24 9/22 10/03 11/08 11/15
24 4/08 3/16 3/23 4/13 4/22 11/04 10/14 10/20 11/18 11/24
20 3/28 3/14 3/16 4/10 4/18 11/11 10/20 11/01 11/29 12/21
16 3/18 2/17 3/01 4/06 4/09 11/25 11/01 11/09 12/09 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 162 138 144 178 194
30 176 138 153 201 212
28 186 162 167 215 227
24 213 189 195 234 243
20 230 193 207 258 280
16 254 218 224 281 284