LEWISTON WSO AP, IDAHO

Period of Record General Climate Summary - Cooling Degree Days

Station:(105241) LEWISTON WSO AP
From Year=1948 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 0 0 2 34 154 331 596 567 290 46 1 0 2021
57 0 0 1 21 116 275 534 505 238 30 1 0 1720
60 0 0 0 9 72 198 442 413 168 14 0 0 1317
65 0 0 0 2 26 99 294 268 79 2 0 0 770
70 0 0 0 0 7 39 166 145 26 0 0 0 383
Cooling 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.
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