POINT ARENA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047009) POINT ARENA
From Year=1948 To Year=1988
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	252	274	313	330	422	487	546	573	560	500	354	273	4885
40 S	252	526	840	1169	1591	2078	2625	3198	3758	4258	4612	4885	4885
45 M	115	141	162	181	267	338	391	418	410	345	208	132	3109
45 S	115	255	418	599	866	1203	1595	2013	2423	2768	2976	3109	3109
50 M	31	43	47	57	116	188	236	263	260	193	85	38	1558
50 S	31	74	121	178	294	482	718	981	1242	1434	1520	1558	1558
55 M	3	6	5	7	20	55	86	111	118	67	18	4	502
55 S	3	9	15	22	42	97	183	295	413	480	498	502	502
60 M	0	1	0	0	2	6	8	15	29	13	2	0	76
60 S	0	1	1	1	3	10	17	32	61	74	76	76	76

Corn Growing Degree Days
50 M	107	113	131	144	182	220	255	277	288	257	169	118	2260
50 S	107	219	350	494	676	896	1152	1428	1716	1973	2142	2260	2260

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