YELLOWSTONE PARK, WYOMING

Period of Record General Climate Summary - Heating Degree Days

Station:(489905) YELLOWSTONE PARK
From Year=1948 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1396	1174	1119	816	552	298	90	123	372	699	1076	1351	9067
60	1241	1033	964	666	399	174	31	46	238	544	926	1196	7459
57	1148	948	871	576	313	116	14	23	171	452	836	1103	6573
55	1086	892	809	517	259	85	8	14	134	392	776	1041	6013
50	931	750	654	372	145	32	2	3	66	257	626	886	4725

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 Jul 28, 2006
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