RITZVILLE, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(457059) RITZVILLE
From Year=1948 To Year=2006
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 0 15 93 232 448 429 206 30 0 0 1453
57 0 0 0 9 68 185 388 369 164 19 0 0 1201
60 0 0 0 4 39 126 301 282 110 8 0 0 870
65 0 0 0 1 13 55 176 159 46 1 0 0 452
70 0 0 0 0 3 19 83 72 13 0 0 0 191
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 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