TRINITY RIVER HATCHERY, CALIFORNIA

Period of Record General Climate Summary - Heating Degree Days

Station:(049026) TRINITY RIVER HATCHERY
From Year=1974 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
65 773 614 549 403 221 70 10 12 66 272 591 789 4369
60 618 472 395 262 115 24 2 2 21 145 441 634 3131
57 525 388 305 189 69 11 0 1 9 86 352 541 2474
55 463 332 248 147 46 5 0 0 4 58 293 479 2075
50 308 197 127 65 13 0 0 0 0 17 161 324 1213
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