LEWISTON WSO AP, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(105241) LEWISTON WSO AP
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
65 984 751 647 425 223 72 8 12 104 409 728 942 5305
60 829 609 492 283 114 21 1 2 41 266 578 787 4022
57 736 525 400 205 65 7 0 0 20 188 489 694 3328
55 674 468 339 158 41 3 0 0 11 142 429 632 2899
50 520 329 198 63 9 0 0 0 2 58 285 478 1941
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