SAN PEDRO, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047876) SAN PEDRO
From Year=1906 To Year=1964
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	467	449	532	574	670	729	851	870	820	752	624	529	7867
40 S	467	916	1448	2022	2692	3421	4272	5143	5963	6715	7338	7867	7867
45 M	313	308	377	424	515	579	696	715	670	597	474	374	6042
45 S	313	621	998	1422	1937	2516	3212	3928	4598	5195	5668	6042	6042
50 M	168	171	223	274	360	429	541	560	520	442	324	222	4234
50 S	168	339	562	836	1196	1625	2166	2727	3247	3689	4013	4234	4234
55 M	62	63	88	130	206	279	386	405	370	287	179	94	2551
55 S	62	125	214	344	550	829	1215	1621	1991	2278	2457	2551	2551
60 M	16	17	23	34	68	130	232	250	220	138	71	28	1227
60 S	16	33	55	90	158	288	519	770	990	1128	1199	1227	1227

Corn Growing Degree Days
50 M	215	206	249	285	362	428	541	560	515	440	336	253	4391
50 S	215	421	671	956	1318	1746	2287	2847	3362	3802	4138	4391	4391

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