CHULA VISTA, CALIFORNIA

Period of Record General Climate Summary - Growing Degree Days

Station:(041758) CHULA VISTA
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	463	451	533	582	686	741	881	929	872	772	585	465	7959
40 S	463	914	1448	2029	2715	3456	4337	5266	6137	6909	7494	7959	7959
45 M	310	310	378	432	531	591	726	774	722	617	435	310	6135
45 S	310	620	998	1430	1960	2551	3277	4051	4773	5390	5825	6135	6135
50 M	166	173	224	282	376	441	571	619	572	462	286	163	4335
50 S	166	340	564	846	1222	1662	2233	2852	3424	3886	4171	4335	4335
55 M	61	66	91	139	221	291	416	464	422	307	145	54	2676
55 S	61	126	217	357	578	869	1285	1749	2170	2478	2622	2676	2676
60 M	13	15	21	41	83	143	261	309	272	159	45	8	1369
60 S	13	28	49	90	173	316	577	886	1158	1316	1361	1369	1369

Corn Growing Degree Days
50 M	243	231	261	297	378	440	570	618	568	463	319	246	4633
50 S	243	473	734	1031	1409	1849	2419	3037	3605	4068	4387	4633	4633

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