Historical Climate Data

Growing Season Summary
Station: 477113 RHINELANDER WATER WORKS, 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 19 135 451 689 853 790 488 192 24 1 3567
GDD
Base 45		 0 0 6 70 311 539 699 635 344 103 8 0 2657
GDD
Base 50		 0 0 1 33 190 391 544 480 217 45 2 0 1863
GDD
Base 55		 0 0 0 14 104 253 389 328 120 16 0 0 1198
GDD
Base 60		 0 0 0 5 48 140 243 189 56 4 0 0 669
MGDD*
Base 50		 0 1 17 105 287 427 546 495 288 118 15 1 2253

*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 4/27 5/08 6/05 6/11 9/24 9/03 9/11 10/04 10/08
30 5/14 4/18 4/27 5/26 6/07 10/02 9/12 9/22 10/10 10/15
28 5/03 4/10 4/24 5/16 5/20 10/08 9/22 9/24 10/21 10/31
24 4/21 3/24 4/07 5/04 5/09 10/21 9/25 10/04 11/07 11/11
20 4/13 3/24 3/29 4/24 4/27 11/04 10/09 10/19 11/15 11/29
16 4/06 3/14 3/19 4/14 4/17 11/08 10/19 10/24 11/21 11/29

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

Base
Temp
°F		 Median Shortest 10% 90% Longest
32 125 98 105 145 156
30 139 98 126 159 169
28 157 133 137 176 183
24 186 139 163 211 227
20 206 176 187 219 249
16 217 189 201 238 261