Historical Climate Data

Growing Season Summary
Station: 470603 BAYFIELD 6 N, 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 1 14 110 385 627 828 795 511 217 29 0 3518
GDD
Base 45		 0 0 3 52 249 479 673 640 364 116 11 0 2588
GDD
Base 50		 0 0 0 23 142 333 518 485 230 51 3 0 1788
GDD
Base 55		 0 0 0 9 70 202 364 332 123 17 0 0 1120
GDD
Base 60		 0 0 0 2 30 100 220 193 54 4 0 0 605
MGDD*
Base 50		 0 1 11 78 239 379 521 494 281 114 15 0 2135

*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 5/21 5/02 5/08 6/08 6/22 10/03 9/08 9/23 10/16 10/26
30 5/13 4/25 4/28 6/05 6/11 10/08 9/20 9/24 10/26 11/05
28 5/07 4/18 4/24 5/19 6/07 10/14 9/25 10/02 11/02 11/13
24 4/18 3/24 4/01 5/04 6/07 11/04 10/14 10/19 11/15 12/03
20 4/08 3/19 3/22 4/20 4/26 11/10 10/20 10/25 11/22 12/04
16 3/29 2/27 3/18 4/10 4/26 11/12 10/31 11/02 11/24 12/15

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 135 100 116 152 165
30 148 119 126 162 177
28 164 137 143 177 198
24 205 145 169 223 233
20 215 177 203 229 253
16 230 205 209 251 278