LEWISTON WSO AP, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(105241) LEWISTON WSO AP
From Year=1948 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
65 978 748 646 428 224 71 7 11 99 409 727 945 5295
60 823 607 491 286 115 20 1 2 38 266 577 790 4016
57 730 522 399 208 66 7 0 0 18 188 487 697 3323
55 668 465 338 160 42 3 0 0 10 143 428 635 2894
50 514 326 197 64 9 0 0 0 2 58 284 481 1935
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