The climate of San Diego: when to go to San Diego

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San Diego has a dry and mild Mediterranean climate which makes it one of the best cities in the United States for the quality and mildness of the climate. San Diego has over 3,000 hours of sunshine per year and an average annual temperature of 17.6 ° C. The city has over 200 days a year with average temperatures above 21 ° C. The hottest month is August when the maximum average temperatures reach 24.7 ° C and the minimum average temperatures reach 19.3 ° C. The coldest month of the year is instead December when the maximum average temperatures reach 18.2 ° C and the minimum average temperatures reach 9.1 ° C. For these climatic parameters, its climate is one of the best in the United States.

Considering the rainfall, the city has a semi-arid climate, on average San Diego receives only 263 mm of rain per year, the rainy days are only 41 in a year, so seeing rain in San Diego is almost a rarity. Almost all of the scarce rains fall between December and March. In the driest months, those between May and September, the city has an average of 1 rainy day per month. In the rainiest months – those between December and March – the rainy days are only 7 per month. Between May and June the influence of the ocean sometimes causes a thin layer of clouds that envelop the city, but only a few kilometers away inland the sky is generally clear.

Due to the presence of the California cold current the temperature of the Pacific ocean water in San Diego is relatively low during the year. The ocean water temperature touches the minimum value of 13.8 ° C in February and reaches 19.9 ° C in August.

WHEN TO GO TO SAN DIEGO

Due to the mild climate that characterizes San Diego every time of the year is excellent for visiting the city. The best months, however, are those that go from April to October when the probability of rain is almost nil and the temperatures very pleasant. The city has an average of almost 150 sunny days and almost 120 partly cloudy days per year.

THE CLIMATE OF SAN DIEGO: CLIMATE TABLES

SAN DIEGO (5 meters)
Month	Average low (°C)	Average high (°C)	Precip. (mm)	Precip. days
January	9,4	18,4	50	6,7
February	10,4	18,3	57	7,1
March	11,8	18,7	46	6,5
April	13,3	19,7	20	4,0
May	15,2	20,3	3	1,4
June	16,7	21,6	2	0,8
July	18,6	23,7	1	0,7
August	19,3	24,7	0	0,4
September	18,4	24,4	4	1,2
October	15,9	22,7	14	2,8
November	12,0	20,6	25	4,1
December	9,1	18,2	39	5,8
YEAR	14,2	20,9	262	41,5

*SAN DIEGO*
Month	Sea Water Temperature °C
January	15,1
February	14,8
March	15,2
April	15,9
May	17,0
June	18,1
July	19,5
August	19,9
September	19,2
October	18,4
November	17,1
December	15,8