MERCED MUNICIPAL ARPT, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(045532) MERCED MUNICIPAL ARPT
From Year=1948 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	194	303	457	603	841	1006	1203	1154	988	754	396	188	8088
40 S	194	497	954	1557	2398	3404	4607	5761	6749	7503	7899	8088	8088
45 M	85	170	303	453	686	856	1048	999	838	599	251	78	6366
45 S	85	255	558	1011	1698	2554	3602	4601	5439	6037	6288	6366	6366
50 M	26	68	162	306	531	706	893	844	688	444	126	22	4816
50 S	26	94	255	561	1092	1799	2692	3536	4223	4668	4794	4816	4816
55 M	5	15	61	173	377	556	738	689	538	294	44	4	3493
55 S	5	20	80	253	631	1187	1925	2614	3152	3446	3490	3493	3493
60 M	0	1	13	74	232	407	583	534	388	160	8	0	2401
60 S	0	2	15	89	321	728	1311	1845	2233	2393	2401	2401	2401

Corn Growing Degree Days
50 M	95	177	280	382	525	619	721	696	606	479	244	98	4922
50 S	95	272	552	934	1459	2078	2799	3495	4101	4580	4824	4922	4922

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 Jul 28, 2006
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