Historical Climate Data

Growing Season Summary
Station: 471568 CHILTON SEWAGE PLANT, 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 41 198 528 804 960 903 631 309 59 5 4284
GDD
Base 45		 0 0 18 111 380 654 806 748 483 190 25 1 3291
GDD
Base 50		 0 0 7 57 248 505 651 594 340 101 9 0 2414
GDD
Base 55		 0 0 2 27 144 359 497 439 213 45 2 0 1657
GDD
Base 60		 0 0 0 11 75 225 343 288 116 15 0 0 1028
MGDD*
Base 50		 0 1 26 126 327 513 639 592 383 171 28 2 2706

*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 5/10 4/17 4/27 5/26 5/27 10/04 9/20 9/23 10/17 11/01
30 5/01 4/07 4/17 5/16 5/22 10/08 9/22 9/24 11/02 11/10
28 4/24 4/06 4/10 5/10 5/14 10/19 9/22 9/28 11/10 11/12
24 4/11 3/23 3/29 4/24 5/05 11/04 10/13 10/19 11/16 11/29
20 4/05 3/13 3/18 4/14 4/24 11/11 10/19 11/01 11/27 12/18
16 3/27 3/06 3/15 4/09 4/11 11/22 11/02 11/10 12/06 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 148 122 132 167 177
30 163 135 137 187 196
28 183 135 146 205 214
24 205 168 188 222 249
20 220 194 207 248 261
16 240 217 219 262 279