BOULDER, UTAH

Period of Record General Climate Summary - Growing Degree Days

Station:(420849) BOULDER
From Year=1954 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	4	17	82	215	476	751	978	907	652	358	67	6	4513
40 S	4	21	104	318	794	1546	2524	3431	4083	4440	4507	4513	4513
45 M	0	3	30	114	329	601	823	752	503	226	21	1	3404
45 S	0	3	34	147	477	1078	1901	2653	3156	3382	3403	3404	3404
50 M	0	0	7	46	200	452	668	597	358	120	3	0	2452
50 S	0	0	7	53	253	706	1374	1971	2329	2449	2452	2452	2452
55 M	0	0	1	13	98	310	513	442	221	47	0	0	1645
55 S	0	0	1	14	112	422	935	1377	1598	1645	1645	1645	1645
60 M	0	0	0	2	35	182	358	289	108	12	0	0	986
60 S	0	0	0	2	37	219	577	866	974	986	986	986	986

Corn Growing Degree Days
50 M	6	16	66	152	300	480	648	591	402	221	50	7	2939
50 S	6	21	87	239	540	1020	1668	2259	2661	2882	2932	2939	2939

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