Historical Climate Data

Growing Season Summary
Station: 474821 LONE ROCK TRI CO, 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		 1 2 46 236 586 821 986 887 613 290 73 5 4539
GDD
Base 45		 0 0 19 140 435 671 831 733 466 180 34 1 3504
GDD
Base 50		 0 0 5 73 295 521 676 578 324 98 12 0 2578
GDD
Base 55		 0 0 0 34 178 372 521 424 202 46 2 0 1776
GDD
Base 60		 0 0 0 14 96 233 368 275 111 17 0 0 1111
MGDD*
Base 50		 1 3 34 159 372 531 659 581 389 195 47 4 2971

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

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 143 120 129 162 171
30 151 138 139 164 171
28 162 139 146 177 193
24 183 157 165 206 208
20 201 177 191 221 223
16 219 194 197 251 264