AVALON CATALINA AP, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(047910) SANTA CATALINA WB AIRPO
From Year=1948 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	420	423	408	471	571	612	894	965	889	831	603	458	7544
40 S	420	843	1251	1722	2293	2905	3799	4764	5652	6483	7087	7544	7544
45 M	273	285	255	321	416	462	739	810	739	676	453	306	5734
45 S	273	558	812	1133	1550	2012	2751	3561	4299	4975	5429	5734	5734
50 M	155	164	124	186	263	312	584	655	589	521	307	172	4032
50 S	155	319	443	629	892	1204	1788	2443	3032	3553	3860	4032	4032
55 M	81	82	55	99	131	167	429	500	439	369	179	84	2614
55 S	81	164	218	317	448	615	1044	1543	1982	2351	2530	2614	2614
60 M	36	35	22	55	61	70	276	346	293	234	93	38	1558
60 S	36	72	93	148	209	279	555	901	1193	1427	1521	1558	1558

Corn Growing Degree Days
50 M	178	189	164	215	278	313	578	635	570	514	315	193	4141
50 S	178	367	532	746	1024	1337	1914	2549	3119	3632	3947	4141	4141

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