Historical Climate Data

Growing Season Summary
Station: 476772 PORT WING 3 E, 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 11 87 357 590 813 777 486 206 30 0 3199
GDD
Base 45		 0 0 2 37 221 446 661 625 346 106 10 0 2328
GDD
Base 50		 0 0 0 14 115 307 509 473 219 43 3 0 1593
GDD
Base 55		 0 0 0 4 50 180 358 324 118 14 0 0 991
GDD
Base 60		 0 0 0 1 19 85 216 190 53 3 0 0 535
MGDD*
Base 50		 0 1 8 63 232 359 514 486 275 107 14 0 1956

*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 5/18 4/28 5/10 6/09 6/17 9/25 8/01 8/27 10/16 10/22
30 5/15 4/26 4/28 6/02 6/09 10/02 8/01 9/20 10/22 10/22
28 5/08 4/06 4/12 5/18 5/29 10/19 8/01 9/20 11/04 11/16
24 4/23 3/29 4/03 5/09 5/10 10/31 7/31 10/07 11/09 11/16
20 4/09 3/18 3/19 4/28 5/01 11/10 8/01 10/20 11/16 11/21
16 4/05 3/05 3/10 4/15 5/01 11/18 8/01 11/03 11/29 12/19

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 127 79 102 150 162
30 142 79 115 166 176
28 166 94 114 200 209
24 195 99 154 213 217
20 215 129 178 229 248
16 231 132 201 259 278