WHITE SWAN, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459191) WHITE SWAN
From Year=1927 To Year=1981
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 19 37 147 322 558 721 925 878 653 345 73 26 4703
40 S 19 56 203 525 1083 1804 2729 3606 4259 4605 4678 4703 4703
45 M 4 9 58 185 403 571 770 723 503 207 21 7 3462
45 S 4 13 71 257 660 1231 2001 2724 3227 3434 3455 3462 3462
50 M 1 1 16 84 257 421 615 568 355 100 4 2 2424
50 S 1 2 18 102 359 780 1395 1963 2318 2418 2422 2424 2424
55 M 0 0 3 29 138 275 460 413 219 37 0 0 1574
55 S 0 0 3 32 169 444 904 1317 1536 1574 1574 1574 1574
60 M 0 0 0 7 59 150 308 263 109 10 0 0 905
60 S 0 0 0 7 66 215 524 786 896 905 905 905 905
Corn Growing Degree Days
50 M 10 26 107 228 372 460 578 556 432 249 47 14 3079
50 S 10 36 143 371 743 1203 1782 2337 2769 3018 3065 3079 3079
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