FORT ROSS, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(043191) FORT ROSS
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	289	296	335	353	423	487	528	554	554	512	387	293	5012
40 S	289	584	920	1272	1696	2183	2711	3265	3819	4331	4718	5012	5012
45 M	142	158	182	203	268	337	373	399	404	357	238	148	3210
45 S	142	300	482	686	954	1291	1664	2063	2467	2824	3062	3210	3210
50 M	39	51	57	70	118	187	218	244	254	203	102	43	1588
50 S	39	91	148	218	336	523	742	986	1240	1443	1545	1588	1588
55 M	4	7	7	11	24	55	73	95	112	73	22	4	488
55 S	4	11	19	30	53	109	181	276	389	461	484	488	488
60 M	0	0	1	1	3	7	7	13	27	15	2	0	77
60 S	0	1	1	3	5	13	19	33	59	75	77	77	77

Corn Growing Degree Days
50 M	113	124	148	168	205	242	261	280	289	260	180	120	2391
50 S	113	238	385	554	758	1000	1262	1541	1831	2090	2271	2391	2391

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