METHOW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(455327) METHOW 2
From Year=1957 To Year=1970
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 0 3 52 241 525 763 966 934 655 245 21 0 4407
40 S 0 4 56 297 822 1585 2551 3485 4140 4386 4407 4407 4407
45 M 0 0 11 110 371 613 811 779 505 122 2 0 3326
45 S 0 0 11 121 493 1106 1917 2696 3202 3324 3326 3326 3326
50 M 0 0 1 34 229 464 656 624 357 49 0 0 2413
50 S 0 0 1 35 264 728 1384 2008 2365 2413 2413 2413 2413
55 M 0 0 0 6 118 316 501 469 219 15 0 0 1645
55 S 0 0 0 6 124 440 942 1411 1630 1645 1645 1645 1645
60 M 0 0 0 1 48 182 349 319 112 3 0 0 1013
60 S 0 0 0 1 48 231 580 899 1010 1013 1013 1013 1013
Corn Growing Degree Days
50 M 0 2 53 182 348 479 595 580 435 179 10 0 2864
50 S 0 2 55 237 585 1064 1660 2240 2675 2854 2864 2864 2864
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