SNOWFLAKE 15 W, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(028018) SNOWFLAKE 15 W
From Year=1965 To Year=1998
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	20	47	143	287	537	810	1009	948	727	424	135	30	5117
40 S	20	67	210	497	1034	1844	2853	3801	4528	4952	5086	5117	5117
45 M	4	12	63	169	387	660	854	793	577	286	58	7	3869
45 S	4	16	79	248	634	1294	2148	2941	3518	3804	3862	3869	3869
50 M	0	2	19	78	246	510	699	638	428	164	16	1	2802
50 S	0	2	22	100	346	857	1556	2193	2622	2786	2801	2802	2802
55 M	0	0	3	25	130	363	544	483	284	71	2	0	1905
55 S	0	0	4	29	158	521	1065	1548	1832	1903	1905	1905	1905
60 M	0	0	0	4	50	224	389	328	153	21	0	0	1170
60 S	0	0	0	4	55	279	668	996	1150	1170	1170	1170	1170

Corn Growing Degree Days
50 M	28	58	129	224	366	527	659	620	465	289	117	38	3518
50 S	28	86	215	439	805	1331	1990	2611	3075	3364	3481	3518	3518

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 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