UKIAH, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049122) UKIAH
From Year=1906 To Year=2005
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 586 441 398 277 150 43 4 4 31 156 398 580 3068
60 431 301 250 150 59 8 0 0 5 61 252 425 1943
57 339 220 170 91 27 2 0 0 1 28 171 333 1381
55 278 169 124 60 13 1 0 0 0 15 124 272 1057
50 141 68 42 14 1 0 0 0 0 2 42 136 447
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 Apr 5, 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