MT LEMMON, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025733) MOUNT LEMMON
From Year=1950 To Year=1956
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	51	47	54	167	437	659	746	707	654	474	172	58	4226
40 S	51	98	152	319	756	1415	2161	2868	3523	3997	4169	4226	4226
45 M	11	9	10	68	296	509	591	552	504	325	72	17	2965
45 S	11	20	30	98	394	903	1495	2047	2551	2876	2949	2965	2965
50 M	0	1	2	12	167	360	436	397	354	188	18	3	1938
50 S	0	1	2	14	181	541	977	1374	1729	1917	1935	1938	1938
55 M	0	0	0	1	66	220	282	242	206	73	1	0	1092
55 S	0	0	0	1	67	287	569	812	1017	1091	1092	1092	1092
60 M	0	0	0	0	17	109	140	99	87	10	0	0	462
60 S	0	0	0	0	17	126	266	365	452	462	462	462	462

Corn Growing Degree Days
50 M	35	35	42	115	270	407	438	404	379	263	107	39	2533
50 S	35	70	112	228	497	904	1342	1746	2124	2387	2494	2533	2533

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