GRAFTON, NORTH DAKOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(323594) GRAFTON STATE SCHOOL
From Year=1893 To Year=2011
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1889	1572	1295	699	326	98	26	53	256	621	1165	1676	9677
60	1734	1431	1141	554	209	39	5	15	149	471	1015	1521	8284
57	1641	1346	1048	469	151	20	2	6	101	386	925	1428	7521
55	1579	1290	986	415	118	12	1	3	75	332	866	1366	7040
50	1424	1148	831	288	57	3	0	0	31	213	716	1211	5922

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