MC MILLIN RSVR, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455224) MC MILLIN RESERVOIR
From Year=1941 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 836 685 662 514 355 209 99 91 202 445 654 811 5564
60 681 544 507 365 213 91 23 18 86 292 504 656 3981
57 588 459 414 278 139 41 6 4 39 206 414 563 3152
55 526 403 353 223 96 20 2 1 20 154 355 501 2654
50 373 264 205 102 24 1 0 0 3 56 213 348 1589
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. This is done for each day of the month and summed.
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