MT LEMMON, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025732) MOUNT LEMMON
From Year=1958 To Year=2010
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	34	10	58	199	399	612	717	673	532	285	139	39	3697
40 S	34	44	102	301	700	1312	2029	2702	3234	3519	3658	3697	3697
45 M	2	1	6	79	246	462	562	518	383	149	49	4	2458
45 S	2	3	8	87	333	795	1357	1875	2258	2406	2455	2458	2458
50 M	0	0	0	15	106	312	407	363	237	54	6	0	1500
50 S	0	0	0	15	121	433	840	1203	1440	1494	1500	1500	1500
55 M	0	0	0	0	30	171	252	208	105	9	0	0	775
55 S	0	0	0	0	30	201	453	661	765	775	775	775	775
60 M	0	0	0	0	5	68	104	68	20	0	0	0	265
60 S	0	0	0	0	5	73	177	245	265	265	265	265	265

Corn Growing Degree Days
50 M	54	31	79	168	297	397	428	379	309	185	121	60	2509
50 S	54	85	164	332	629	1026	1455	1834	2143	2328	2449	2509	2509

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