Historical Climate Data

Growing Season Summary
Station: 478672 TWO RIVERS, 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 0 19 110 366 624 832 835 586 272 50 3 3700
GDD
Base 45		 0 0 5 40 222 474 677 680 437 148 15 0 2703
GDD
Base 50		 0 0 1 11 108 325 522 525 294 60 3 0 1853
GDD
Base 55		 0 0 0 2 41 188 367 370 166 16 0 0 1154
GDD
Base 60		 0 0 0 0 12 86 216 220 72 2 0 0 611
MGDD*
Base 50		 0 0 9 47 169 343 519 526 321 108 13 0 2060

*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 5/02 4/07 4/19 5/11 5/14 10/10 9/22 9/27 10/31 11/15
30 4/22 4/03 4/09 5/07 5/14 10/20 9/22 10/02 11/10 11/15
28 4/14 3/24 4/05 5/02 5/09 10/31 10/02 10/14 11/15 11/16
24 4/07 3/16 3/21 4/16 5/02 11/10 10/20 10/27 11/21 12/07
20 3/28 3/12 3/17 4/09 4/11 11/15 10/20 11/03 12/03 12/21
16 3/20 2/18 3/05 4/06 4/09 11/23 11/03 11/09 12/10 12/21

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 164 138 149 183 192
30 185 138 163 205 212
28 191 165 178 217 233
24 219 190 198 242 249
20 231 194 217 257 280
16 249 218 230 272 285