Historical Climate Data

Growing Season Summary
Station: 477158 RICHLAND CENTER, 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 4 56 227 553 810 978 904 620 296 55 4 4414
GDD
Base 45		 0 1 26 130 402 660 823 749 472 181 23 1 3393
GDD
Base 50		 0 0 10 66 265 511 668 594 331 98 8 0 2491
GDD
Base 55		 0 0 3 30 151 364 513 439 207 44 2 0 1710
GDD
Base 60		 0 0 1 13 74 228 360 289 113 16 0 0 1065
MGDD*
Base 50		 0 4 42 155 353 525 646 591 390 199 38 3 2885

*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 4/22 4/27 5/24 5/31 9/30 9/07 9/16 10/12 10/17
30 5/05 3/30 4/23 5/15 5/20 10/04 9/07 9/22 10/14 10/17
28 4/30 3/30 4/09 5/13 5/15 10/08 9/22 9/25 10/21 11/01
24 4/14 3/24 3/28 4/25 4/28 10/19 10/02 10/07 11/07 11/12
20 4/06 3/18 3/24 4/18 4/22 11/04 10/04 10/20 11/13 11/16
16 3/31 3/14 3/15 4/12 4/18 11/11 10/20 10/23 11/30 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 145 119 128 158 168
30 150 127 138 164 169
28 160 139 144 181 202
24 189 161 169 211 228
20 212 173 194 228 243
16 224 194 203 258 279