ALEXANDRIA, SOUTH DAKOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(390128) ALEXANDRIA
From Year=1893 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1497	1234	976	504	207	40	4	12	131	435	905	1343	7289
60	1342	1092	822	369	113	12	0	2	64	300	755	1188	6060
57	1249	1008	731	294	72	5	0	1	38	229	666	1095	5389
55	1187	951	671	248	52	3	0	0	26	188	607	1033	4967
50	1032	810	526	150	19	0	0	0	9	106	464	879	3995

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