Historical Climate Data

Growing Season Summary
Station: 477725 SHEBOYGAN, 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 4 39 164 459 744 964 945 687 350 80 8 4440
GDD
Base 45		 0 0 15 78 310 595 810 790 538 215 31 2 3381
GDD
Base 50		 0 0 5 31 181 445 656 635 391 109 9 0 2463
GDD
Base 55		 0 0 1 10 91 301 502 480 252 42 2 0 1684
GDD
Base 60		 0 0 0 3 39 175 348 326 137 12 0 0 1043
MGDD*
Base 50		 0 1 20 80 238 448 637 626 408 168 28 3 2658

*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 4/23 3/26 4/09 5/07 5/14 10/19 9/22 10/04 11/07 11/16
30 4/19 3/25 4/03 4/30 5/07 10/26 10/02 10/11 11/14 11/20
28 4/13 3/22 3/26 4/25 5/01 11/03 10/11 10/19 11/15 11/20
24 4/05 3/12 3/17 4/11 4/18 11/10 10/20 10/31 11/21 12/21
20 3/25 3/06 3/13 4/10 4/11 11/21 11/01 11/07 12/06 12/21
16 3/15 2/13 2/17 4/06 4/08 12/02 11/02 11/11 12/16 12/23

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 184 138 164 204 212
30 190 164 171 218 225
28 207 175 187 224 236
24 219 194 207 240 281
20 237 209 217 262 281
16 265 218 233 284 305