ZION NATIONAL PARK, UTAH

Period of Record General Climate Summary - Heating Degree Days

Station:(429717) ZION NATIONAL PARK
From Year=1928 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	761	571	452	227	67	5	1	0	7	123	455	727	3398
60	606	431	307	127	29	1	1	0	2	62	314	572	2452
57	513	349	229	84	16	0	1	0	1	38	239	479	1950
55	452	297	183	62	10	0	1	0	1	26	195	418	1645
50	305	180	93	25	2	0	1	0	0	9	105	274	994

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