MT VERNON 3 WNW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455678) MOUNT VERNON 3 WNW
From Year=1956 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
65 788 645 623 487 333 193 111 97 219 445 624 768 5331
60 633 504 468 337 186 67 19 15 89 291 474 613 3698
57 540 419 375 248 109 22 3 2 38 203 385 520 2865
55 478 363 313 191 67 8 1 0 18 150 326 458 2374
50 328 227 167 70 10 0 0 0 2 52 188 307 1349
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 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