SEATTLE MAPLE LEAF R, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457463) SEATTLE MAPLE LEAF R
From Year=1941 To Year=1960
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 49 82 127 288 458 562 754 721 593 394 137 89 4256
40 S 49 131 258 546 1004 1567 2321 3043 3636 4030 4167 4256 4256
45 M 8 22 33 147 304 412 599 566 443 244 42 21 2842
45 S 8 29 63 210 514 926 1526 2092 2535 2779 2821 2842 2842
50 M 0 3 5 50 163 263 444 411 293 115 4 2 1755
50 S 0 3 8 58 221 485 929 1340 1634 1749 1753 1755 1755
55 M 0 0 1 12 67 125 290 257 153 37 0 0 942
55 S 0 0 1 13 80 205 495 752 905 942 942 942 942
60 M 0 0 0 1 24 41 149 115 56 7 0 0 393
60 S 0 0 0 1 25 66 215 330 387 393 393 393 393
Corn Growing Degree Days
50 M 3 16 33 115 213 279 441 412 309 154 27 8 2010
50 S 3 19 52 167 381 660 1101 1513 1821 1976 2002 2010 2010
M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Western Regional Climate Center, wrcc@dri.edu