Historical Climate Data

Growing Season Summary
Station: 475932 NEW LONDON, 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 38 205 545 794 949 876 591 278 49 3 4260
GDD
Base 45		 0 0 16 118 397 645 795 721 446 165 21 0 3269
GDD
Base 50		 0 0 6 61 262 495 640 566 306 85 7 0 2389
GDD
Base 55		 0 0 2 29 152 350 485 411 187 35 1 0 1629
GDD
Base 60		 0 0 0 12 79 217 332 263 99 12 0 0 1001
MGDD*
Base 50		 0 1 26 137 339 508 625 569 366 170 29 1 2727

*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 5/09 4/07 4/23 5/29 5/30 10/02 9/11 9/19 10/13 10/16
30 5/03 4/07 4/16 5/20 5/29 10/05 9/20 9/22 10/17 11/01
28 4/24 4/04 4/09 5/12 5/29 10/09 9/20 9/23 11/01 11/10
24 4/12 3/25 4/02 4/22 4/28 10/30 9/23 10/03 11/12 11/16
20 4/06 3/07 3/22 4/11 4/18 11/05 10/07 10/21 11/16 11/22
16 3/28 2/27 3/13 4/09 4/18 11/14 10/18 11/02 12/01 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 145 115 129 161 171
30 157 115 136 176 182
28 167 136 152 192 212
24 197 157 182 216 218
20 217 188 199 230 258
16 233 194 216 262 279