Historical Climate Data

Growing Season Summary
Station: 476208 OCONTO 4 W, 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 0 22 143 461 717 893 821 536 237 42 2 3783
GDD
Base 45		 0 0 8 75 318 568 738 666 390 132 17 0 2845
GDD
Base 50		 0 0 3 36 198 419 583 511 255 62 5 0 2025
GDD
Base 55		 0 0 0 16 109 279 429 357 145 22 1 0 1327
GDD
Base 60		 0 0 0 5 53 160 278 212 68 7 0 0 765
MGDD*
Base 50		 0 0 16 97 282 445 579 522 325 145 24 1 2381

*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 5/14 4/25 4/30 5/31 6/16 9/26 9/07 9/18 10/12 10/16
30 5/04 4/17 4/26 5/19 6/16 10/03 9/20 9/23 10/14 10/22
28 4/30 4/01 4/11 5/15 5/18 10/07 9/20 9/23 10/28 11/03
24 4/17 3/23 3/29 4/30 5/07 10/21 9/23 10/01 11/12 11/16
20 4/07 3/14 3/23 4/18 4/19 11/07 10/13 10/18 11/16 11/20
16 3/30 3/07 3/17 4/10 4/18 11/16 10/25 11/02 11/25 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 138 97 121 150 161
30 155 120 129 163 176
28 162 133 136 183 203
24 189 139 165 208 213
20 216 179 202 231 235
16 231 209 217 248 273