SEDRO WOOLLEY 1 E, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457507) SEDRO WOOLLEY 1 E
From Year=1931 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 73 91 168 292 466 581 701 711 556 359 151 81 4230
40 S 73 164 332 624 1090 1671 2371 3082 3638 3997 4148 4230 4230
45 M 21 27 60 151 311 431 546 556 406 210 59 24 2800
45 S 21 48 108 259 569 1000 1546 2102 2508 2718 2777 2800 2800
50 M 4 4 12 53 165 281 391 401 257 90 14 4 1675
50 S 4 8 20 73 238 519 909 1310 1567 1657 1671 1675 1675
55 M 0 0 1 12 61 138 237 246 120 24 1 0 843
55 S 0 1 2 14 76 214 451 697 817 841 843 843 843
60 M 0 0 0 1 15 42 99 104 32 3 0 0 297
60 S 0 0 0 2 17 59 158 262 294 297 297 297 297
Corn Growing Degree Days
50 M 17 31 68 140 242 312 410 420 305 170 45 16 2177
50 S 17 48 115 255 498 810 1220 1641 1946 2116 2160 2177 2177
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