Historical Climate Data

Growing Season Summary
Station: 475581 MONTELLO, 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 51 225 572 829 977 892 621 298 56 4 4532
GDD
Base 45		 0 0 24 132 423 679 822 738 474 182 25 1 3506
GDD
Base 50		 0 0 10 72 286 529 668 585 332 97 9 0 2591
GDD
Base 55		 0 0 4 36 171 383 513 431 208 42 2 0 1794
GDD
Base 60		 0 0 1 17 90 245 359 282 112 13 0 0 1121
MGDD*
Base 50		 0 2 34 149 352 533 650 584 383 185 32 2 2909

*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 4/21 4/25 5/30 6/22 10/03 9/12 9/20 10/14 10/17
30 5/05 4/09 4/22 5/16 5/26 10/04 9/12 9/21 10/15 10/20
28 4/27 3/27 4/11 5/09 5/15 10/07 9/15 9/22 10/26 11/03
24 4/10 3/24 3/29 4/20 4/22 10/24 10/02 10/08 11/12 11/12
20 4/05 3/19 3/23 4/13 4/19 11/04 10/14 10/20 11/13 11/16
16 3/25 3/13 3/17 4/09 4/19 11/11 10/20 11/01 11/30 12/20

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 144 94 126 160 176
30 153 128 137 168 176
28 162 136 140 185 191
24 194 172 177 219 234
20 211 194 199 230 242
16 230 200 208 254 279