Historical Climate Data

Growing Season Summary
Station: 476330 OSHKOSH, 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 2 39 198 553 816 989 915 635 306 59 4 4465
GDD
Base 45		 0 0 17 110 404 666 834 760 487 187 24 1 3452
GDD
Base 50		 0 0 7 56 268 517 679 605 345 99 8 0 2554
GDD
Base 55		 0 0 2 26 158 371 524 450 218 43 2 0 1775
GDD
Base 60		 0 0 0 11 83 237 370 299 119 14 0 0 1121
MGDD*
Base 50		 0 1 24 115 325 522 664 602 380 163 28 2 2796

*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 5/01 4/08 4/16 5/12 5/15 10/08 9/20 9/23 10/31 11/10
30 4/22 3/26 4/05 5/10 5/12 10/13 9/20 9/25 11/01 11/10
28 4/19 3/25 4/02 5/05 5/09 10/21 9/22 10/03 11/10 11/16
24 4/09 3/19 3/24 4/23 5/01 11/04 10/13 10/19 11/16 11/27
20 4/06 3/13 3/19 4/11 4/19 11/11 10/20 10/27 11/29 12/21
16 3/24 2/18 3/08 4/07 4/09 11/19 10/20 11/04 12/07 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 160 128 138 188 199
30 174 136 146 202 216
28 187 139 161 212 232
24 212 176 187 232 247
20 220 194 205 243 279
16 240 194 219 271 280