YUMA WB CITY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029662) YUMA WB CITY
From Year=1893 To Year=1974
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	459	533	741	904	1138	1342	1586	1560	1340	1034	673	474	11783
40 S	459	991	1732	2636	3774	5117	6703	8262	9602	10636	11309	11783	11783
45 M	307	392	586	754	983	1192	1431	1405	1190	879	523	321	9963
45 S	307	700	1286	2039	3023	4215	5646	7050	8240	9119	9642	9963	9963
50 M	170	256	431	604	828	1042	1276	1250	1040	724	375	178	8173
50 S	170	426	857	1461	2289	3331	4607	5857	6896	7620	7995	8173	8173
55 M	65	135	280	454	673	892	1121	1095	890	569	233	70	6477
55 S	65	200	480	934	1608	2500	3621	4715	5605	6174	6407	6477	6477
60 M	14	49	150	307	519	742	966	940	740	415	113	15	4968
60 S	14	63	213	520	1039	1781	2747	3686	4426	4840	4954	4968	4968

Corn Growing Degree Days
50 M	271	325	460	562	702	802	969	966	828	655	418	275	7233
50 S	271	596	1056	1617	2319	3121	4091	5057	5884	6540	6958	7233	7233

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