Historical Climate Data

Growing Season Summary
Station: 470175 AMERY 2 N, 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 1 27 183 518 758 930 846 546 228 30 1 4041
GDD
Base 45		 0 0 10 103 371 608 775 692 402 130 11 0 3085
GDD
Base 50		 0 0 3 50 241 460 620 538 268 63 3 0 2238
GDD
Base 55		 0 0 0 21 137 317 465 386 158 25 0 0 1507
GDD
Base 60		 0 0 0 8 66 191 313 243 79 7 0 0 908
MGDD*
Base 50		 0 0 17 118 313 478 613 545 327 138 18 0 2553

*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 4/11 4/26 5/27 5/30 9/28 9/01 9/14 10/09 10/14
30 5/03 3/29 4/11 5/19 5/25 10/02 9/03 9/21 10/13 10/22
28 4/27 3/25 4/09 5/07 5/16 10/04 9/20 9/23 10/22 10/31
24 4/15 3/14 3/31 4/29 5/06 10/22 9/25 10/03 11/05 11/11
20 4/09 3/14 3/24 4/20 5/02 10/30 10/02 10/11 11/10 11/22
16 4/03 3/04 3/08 4/10 4/17 11/07 10/02 10/22 11/27 12/07

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 141 110 115 157 173
30 152 120 127 177 194
28 161 131 140 193 204
24 189 151 168 215 226
20 201 177 187 231 242
16 222 177 200 254 266