Monthly weather forecast and climate
San Diego, CA

Coronado Island in San Diego, California, USA,
Coronado Island in San Diego, California, USA,

Weather in January

January, the same as December, is another enjoyable winter month in San Diego, California, with average temperature ranging between max 64.2°F (17.9°C) and min 52.7°F (11.5°C). In San Diego, the average high-temperature in January is essentially the same as in December - a still enjoyable 64.2°F (17.9°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in San Diego, California, with temperature in the range of an average high of 63.1°F (17.3°C) and an average low of 51.8°F (11°C). February is the coldest month, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 51.8°F (11°C). Weather in February »

Weather in March

The first month of the spring, March, is also an enjoyable month in San Diego, California, with average temperature varying between 52.7°F (11.5°C) and 64.4°F (18°C). In March, the average high-temperature is relatively the same as in February - a still comfortable 64.4°F (18°C). Weather in March »

Weather in April

April, the same as March, is another enjoyable spring month in San Diego, California, with temperature in the range of an average low of 54.1°F (12.3°C) and an average high of 66.2°F (19°C). In April, the average high-temperature is almost the same as in March - a still enjoyable 66.2°F (19°C). Weather in April »

Weather in May

May, the last month of the spring, in San Diego, is another comfortable month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 67.6°F (19.8°C). In May, the average high-temperature is almost the same as in April - a still comfortable 67.6°F (19.8°C). Weather in May »

Weather in June

June, the first month of the summer, in San Diego, is a pleasant month, with average temperature fluctuating between 70.7°F (21.5°C) and 58.8°F (14.9°C). In San Diego, the average high-temperature in June is essentially the same as in May - an agreeable 70.7°F (21.5°C). Weather in June »

Weather in July

July in San Diego, California, is a moderately hot summer month, with temperature in the range of an average low of 64.2°F (17.9°C) and an average high of 75.4°F (24.1°C). In San Diego, the average high-temperature is practically the same as in June - a moderately hot 75.4°F (24.1°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in San Diego, California, with average temperature varying between 77.4°F (25.2°C) and 65.7°F (18.7°C). With an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 65.7°F (18.7°C), August is the warmest month. Weather in August »

Weather in September

September, the first month of the autumn, in San Diego, is also a moderately hot month, with average temperature varying between 76.6°F (24.8°C) and 65.1°F (18.4°C). In San Diego, the average high-temperature is practically the same as in August - a still warm 76.6°F (24.8°C). Weather in September »

Weather in October

October, the same as September, in San Diego, California, is another pleasant autumn month, with average temperature varying between 73.2°F (22.9°C) and 61.9°F (16.6°C). In San Diego, California, the average high-temperature is essentially the same as in September - a pleasant 73.2°F (22.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in San Diego, California, with temperature in the range of an average low of 57.4°F (14.1°C) and an average high of 68.5°F (20.3°C). In San Diego, California, the average high-temperature is relatively the same as in October - a still pleasant 68.5°F (20.3°C). Weather in November »

Weather in December

December, the first month of the winter, in San Diego, is still a comfortable month, with average temperature varying between 52.7°F (11.5°C) and 63.3°F (17.4°C). In San Diego, California, the average high-temperature is practically the same as in November - an enjoyable 63.3°F (17.4°C). Weather in December »
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FAQ

How many days does it rain in San Diego?

Throughout the year, there are 61.8 rainfall days, and 8.7" (221mm) of precipitation is accumulated.

What is the month with the lowest UV index in San Diego?

Months with the lowest UV index in San Diego, California, are January through March, November and December, with an average maximum UV index of 4.

What is the coldest month in San Diego?

February is the coldest month, with an average high-temperature of 63.1°F (17.3°C) and an average low-temperature of 51.8°F (11°C).

What month is the ocean coldest in San Diego?

With an average ocean temperature of 58.6°F (14.8°C), February is the month with the coldest seawater.

What is the most humid month in San Diego?

The most humid month in San Diego, California, is June, with an average relative humidity of 73%.

What is the driest month in San Diego?

June is the month with the least rainfall. Rain falls for 2.7 days and accumulates 0.12" (3mm) of precipitation.

When are the longest days in San Diego?

June has the longest days of the year in San Diego, with an average of 14.3h of daylight.

What are the months with the most sunshine in San Diego?

July and August, with an average of 11.9h of sunshine, are months with the most sunshine.

What are the months with the highest UV index in San Diego?

July through September, with an average maximum UV index of 6, are months with the highest UV index.

What is the warmest month in San Diego?

The warmest month is August, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 65.7°F (18.7°C).

What is the month with the warmest ocean in San Diego?

August is the month with the warmest seawater in San Diego, with an average ocean temperature of 68°F (20°C).

What is the least humid month in San Diego?

The least humid month in San Diego is November, with an average relative humidity of 59%.

What is the wettest month in San Diego?

The month with the most rainfall in San Diego is December when the rain falls for 5.8 days and typically aggregates up to 1.65" (42mm) of precipitation.

What is the month with the shortest days in San Diego?

December has the shortest days of the year in San Diego, with an average of 10h of daylight.

What is the month with the least sunshine in San Diego?

The month with the least sunshine is December, with an average of 6.7h of sunshine.

Average temperature
San Diego, CA

Average temperature - San Diego, CA

The warmest month (with the highest average high temperature) is August (25.2°C).
The month with the lowest average high temperature is February (17.3°C).

The month with the highest average low temperature is August (18.7°C).
The coldest month (with the lowest average low temperature) is February (11°C).

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Average pressure
San Diego, CA

Average pressure - San Diego, CA

The month with the highest atmospheric pressure is January (1018.8mbar).
Months with the lowest atmospheric pressure are June and September (1011.9mbar).

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Average wind speed
San Diego, CA

Average wind speed - San Diego, CA

The windiest month (with the highest average wind speed) is April (10.2km/h).
The calmest month (with the lowest average wind speed) is October (8.3km/h).

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Average rainfall
San Diego, CA

Average rainfall - San Diego, CA

The wettest month (with the highest rainfall) is December (42mm).
The driest month (with the least rainfall) is June (3mm).

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Average rainfall days
San Diego, CA

Average rainfall days - San Diego, CA

The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (2.7 days).

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Average sea temperature
San Diego, CA

Average sea temperature - San Diego, CA

The best month for swimming (with the highest average sea temperature) is August (20°C).
The coldest month (with the lowest average sea temperature) is February (14.8°C).

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Average daylight / Average sunshine
San Diego, CA

Average daylight / Average sunshine - San Diego, CA

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

Months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days
San Diego, CA

Average sunshine days - San Diego, CA

The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is July (20.3 days).

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Average UV index
San Diego, CA

Average UV index - San Diego, CA

Months with the highest UV index are July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average visibility
San Diego, CA

Average visibility - San Diego, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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