SWAN LAKE, MISSISSIPPI

Period of Record General Climate Summary - Heating Degree Days

From Year=1905 To Year=2000
Station:(228591) SWAN LAKE
Averages Daily Extremes
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 595 582 443 71 20 0 0 -99 -99 140 279 -99 -99
60 448 446 305 29 6 0 0 -99 -99 67 162 -99 -99
57 367 369 230 13 0 0 0 -99 -99 29 106 -99 -99
55 317 321 184 9 0 0 0 -99 -99 11 74 -99 -99
50 204 220 94 4 0 0 0 -99 -99 0 29 -99 -99
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 May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster