Historical Climate Data

Growing Season Summary
Station: 473022 GAYS MILLS, WI

Growing Degree Day Averages
Derived from 1986-2000 Data

Element JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
GDD
Base 40		 0 4 54 186 506 799 944 883 579 253 41 4 4212
GDD
Base 45		 0 0 24 98 358 650 789 729 435 149 16 1 3219
GDD
Base 50		 0 0 10 45 228 502 634 575 297 77 5 0 2350
GDD
Base 55		 0 0 4 19 124 358 479 421 178 31 1 0 1602
GDD
Base 60		 0 0 1 7 57 225 325 272 91 10 0 0 983
MGDD*
Base 50		 0 4 46 141 325 514 619 573 364 181 32 2 2779

*Modified Growing Degree Days: Base 50 Ceiling 86.

Growing Season Summary
Derived from 1986-2000 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 5/11 4/23 4/28 5/27 5/27 10/02 9/20 9/22 10/13 10/14
30 5/07 4/23 4/25 5/17 5/22 10/04 9/21 9/23 10/14 10/15
28 4/29 3/30 4/08 5/15 5/17 10/06 9/23 9/24 10/23 10/27
24 4/19 3/29 4/02 4/30 5/07 10/15 10/03 10/04 10/25 11/01
20 4/07 3/24 3/27 4/18 4/19 10/29 10/04 10/10 11/09 11/15
16 4/04 3/15 3/18 4/15 4/19 11/07 10/19 10/30 11/23 11/30

Length of Growing Season (Days)
Derived from 1986-2000 Averages

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 142 125 129 161 167
30 150 139 141 162 168
28 161 140 142 186 188
24 178 163 164 207 209
20 205 174 176 218 228
16 216 194 205 249 252