CHANDLER, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(021511) CHANDLER
From Year=1912 To Year=1980
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	277	382	543	750	1033	1301	1521	1468	1239	897	513	300	10222
40 S	277	659	1201	1951	2984	4285	5806	7274	8513	9409	9922	10222	10222
45 M	142	244	388	600	878	1151	1366	1313	1089	742	364	163	8439
45 S	142	386	774	1374	2252	3403	4769	6082	7171	7912	8277	8439	8439
50 M	51	124	241	450	723	1001	1211	1158	939	587	225	63	6772
50 S	51	175	415	865	1589	2590	3801	4958	5897	6484	6709	6772	6772
55 M	10	42	116	305	569	851	1056	1003	789	434	111	13	5298
55 S	10	52	168	473	1042	1893	2949	3952	4740	5174	5285	5298	5298
60 M	1	7	37	174	417	701	901	848	639	287	38	1	4052
60 S	1	9	46	220	636	1337	2238	3086	3725	4012	4050	4052	4052

Corn Growing Degree Days
50 M	226	277	379	486	621	748	928	895	754	569	381	245	6507
50 S	226	503	881	1367	1988	2736	3663	4558	5312	5881	6262	6507	6507

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