OMAK, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(456121) OMAK
From Year=1980 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 4 21 143 369 615 843 1025 1046 694 326 69 6 5161
40 S 4 25 168 537 1152 1995 3020 4066 4760 5087 5155 5161 5161
45 M 0 4 47 229 460 693 870 891 544 191 24 1 3955
45 S 0 4 51 281 741 1434 2304 3195 3739 3930 3954 3955 3955
50 M 0 0 8 118 308 544 715 736 395 91 5 0 2920
50 S 0 0 9 126 435 978 1693 2429 2824 2915 2920 2920 2920
55 M 0 0 1 41 173 395 560 581 257 38 1 0 2048
55 S 0 0 1 41 215 610 1170 1751 2008 2046 2048 2048 2048
60 M 0 0 0 9 80 254 406 426 146 9 0 0 1329
60 S 0 0 0 9 88 342 748 1175 1320 1329 1329 1329 1329
Corn Growing Degree Days
50 M 2 11 98 242 374 526 638 657 436 209 26 1 3220
50 S 2 13 111 353 728 1253 1891 2548 2984 3193 3219 3220 3220
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