YUMA VALLEY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029657) YUMA VALLEY
From Year=1930 To Year=1992
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	405	478	671	848	1093	1278	1542	1525	1311	1020	625	430	11228
40 S	405	883	1554	2403	3495	4773	6316	7841	9152	10172	10797	11228	11228
45 M	257	338	516	698	938	1128	1387	1370	1161	865	476	279	9414
45 S	257	595	1111	1809	2747	3875	5263	6633	7794	8659	9135	9414	9414
50 M	130	206	363	548	783	978	1232	1215	1011	710	329	144	7651
50 S	130	336	699	1247	2030	3008	4240	5456	6467	7177	7506	7651	7651
55 M	45	98	219	399	628	828	1077	1060	861	555	196	49	6017
55 S	45	143	362	761	1389	2217	3295	4355	5216	5772	5968	6017	6017
60 M	8	31	103	258	473	678	922	905	711	403	91	8	4593
60 S	8	39	142	400	874	1552	2474	3379	4091	4494	4585	4593	4593

Corn Growing Degree Days
50 M	286	330	439	530	660	750	931	930	793	630	421	299	7001
50 S	286	617	1056	1587	2247	2997	3928	4858	5651	6280	6701	7001	7001

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