LEWISTON WATER PLANT, IDAHO

Period of Record General Climate Summary - Cooling Degree Days

Station:(105236) LEWISTON WATER PLANT
From Year=1894 To Year=1955
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 3 53 209 359 648 602 316 58 0 0 2249
57 0 0 1 34 161 301 586 541 262 35 0 0 1921
60 0 0 0 15 101 220 493 448 187 14 0 0 1479
65 0 0 0 3 39 111 341 296 89 3 0 0 882
70 0 0 0 0 12 43 201 160 33 0 0 0 448
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