RIVERDALE, UTAH

Period of Record General Climate Summary - Growing Degree Days

Station:(427318) RIVERDALE
From Year=1928 To Year=1991
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	22	100	291	548	791	1083	1021	697	380	79	10	5026
40 S	5	27	127	418	966	1757	2840	3860	4557	4938	5017	5026	5026
45 M	0	5	41	174	400	641	928	866	549	245	27	2	3877
45 S	0	5	46	220	620	1261	2189	3054	3603	3848	3875	3877	3877
50 M	0	1	12	88	265	492	773	711	404	133	6	0	2884
50 S	0	1	13	101	366	858	1631	2341	2745	2878	2883	2884	2884
55 M	0	0	2	35	152	348	618	556	270	54	0	0	2035
55 S	0	0	2	37	189	537	1155	1711	1981	2035	2035	2035	2035
60 M	0	0	0	10	70	219	463	403	154	14	0	0	1333
60 S	0	0	0	10	80	299	762	1166	1319	1333	1333	1333	1333

Corn Growing Degree Days
50 M	2	13	67	185	343	498	695	663	445	240	52	5	3207
50 S	2	15	82	266	609	1107	1802	2465	2910	3150	3202	3207	3207

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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