RICHLAND, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457015) RICHLAND
From Year=1948 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 979 725 573 340 147 34 4 4 71 345 681 926 4828
60 824 584 418 202 58 6 0 0 21 208 531 771 3624
57 731 499 327 131 26 2 0 0 9 138 442 678 2983
55 670 443 268 91 13 1 0 0 5 99 384 616 2589
50 517 307 137 24 1 0 0 0 1 34 248 463 1731
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 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