BOTHELL, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(450826) BOTHELL 2 N
From Year=1931 To Year=1959
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 57 68 129 262 436 535 679 665 537 343 134 80 3924
40 S 57 124 253 516 952 1487 2165 2830 3367 3711 3844 3924 3924
45 M 14 18 41 131 283 385 524 510 388 198 47 19 2557
45 S 14 32 73 204 487 871 1395 1905 2292 2490 2537 2557 2557
50 M 2 2 8 43 145 236 369 355 242 85 8 1 1496
50 S 2 4 11 55 200 436 805 1160 1402 1487 1495 1496 1496
55 M 0 0 1 10 55 104 215 201 116 23 1 0 724
55 S 0 0 1 11 65 169 384 585 701 724 724 724 724
60 M 0 0 0 1 14 28 84 74 34 3 0 0 239
60 S 0 0 0 1 15 44 128 201 235 239 239 239 239
Corn Growing Degree Days
50 M 13 29 67 155 254 301 411 402 324 179 47 16 2199
50 S 13 42 109 263 518 819 1230 1632 1956 2136 2183 2199 2199
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