WHITE SWAN, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(459191) WHITE SWAN
From Year=1948 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 43 134 305 549 728 912 868 648 327 76 24 4634
40 S 19 63 197 502 1051 1778 2691 3559 4207 4535 4610 4634 4634
45 M 4 11 49 170 394 578 757 713 499 188 21 7 3392
45 S 4 15 64 234 629 1206 1963 2677 3175 3364 3385 3392 3392
50 M 0 1 12 73 250 428 602 558 351 86 4 1 2366
50 S 0 2 13 86 336 764 1366 1924 2275 2361 2365 2366 2366
55 M 0 0 2 25 132 282 447 404 215 28 1 0 1536
55 S 0 0 2 26 159 441 888 1292 1507 1535 1536 1536 1536
60 M 0 0 0 7 56 157 297 254 106 5 0 0 881
60 S 0 0 0 7 63 219 516 770 876 881 881 881 881
Corn Growing Degree Days
50 M 10 32 97 216 364 464 571 550 429 237 50 13 3034
50 S 10 42 139 355 719 1184 1755 2304 2733 2970 3021 3034 3034
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 Jul 28, 2006
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