MERRILL, MISSISSIPPI

Period of Record General Climate Summary - Heating Degree Days

From Year=1905 To Year=1998
Station:(225789) MERRILL
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
65 562 411 253 85 13 0 0 0 4 102 292 490 2210
60 421 291 149 33 2 0 0 0 1 44 182 356 1479
57 343 227 103 16 1 0 0 0 0 22 129 282 1123
55 294 188 78 9 0 0 0 0 0 13 100 237 920
50 185 106 35 2 0 0 0 0 0 3 45 140 515
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