Monthly weather forecast and climate
San Diego, CA

Coronado Island in San Diego, California, USA,
Coronado Island in San Diego, California, USA,
January, the same as December, is another enjoyable winter month in San Diego, California, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 64.2°F (17.9°C). In January, the average high-temperature is almost the same as in December - a still enjoyable 64.2°F (17.9°C). Weather in January »

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

The first month of the spring, March, is still a comfortable 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 practically the same as in February - a still comfortable 64.4°F (18°C). Weather in March »

April, like March, in San Diego, California, is another comfortable spring month, with average temperature ranging between min 54.1°F (12.3°C) and max 66.2°F (19°C). In San Diego, California, the average high-temperature is practically the same as in March - a still enjoyable 66.2°F (19°C). Weather in April »

The last month of the spring, May, is also an enjoyable month in San Diego, California, with average temperature fluctuating between 67.6°F (19.8°C) and 56.3°F (13.5°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 »

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

July in San Diego, California, is a moderately hot summer month, with average temperature fluctuating between 64.2°F (17.9°C) and 75.4°F (24.1°C). In San Diego, the average high-temperature is essentially the same as in June - a warm 75.4°F (24.1°C). Weather in July »

August, the last month of the summer, in San Diego, is another warm month, with average temperature fluctuating between 77.4°F (25.2°C) and 65.7°F (18.7°C). 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). Weather in August »

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

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

The last month of the autumn, November, is also an agreeable 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, the average high-temperature is essentially the same as in October - a still agreeable 68.5°F (20.3°C). Weather in November »

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, the average high-temperature in December is relatively the same as in November - an enjoyable 63.3°F (17.4°C). Weather in December »

How many days does it rain in San Diego?

In San Diego, California, during the entire year, the rain falls for 61.8 days and collects up to 8.7" (221mm) of precipitation.

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

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

What is the coldest month in San Diego?

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

What is the month with the coldest ocean 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 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 is the month 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 is the month 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 in San Diego, California.

What is the warmest month in San Diego?

August is the warmest month in San Diego, California, 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 month is the ocean warmest in San Diego?

The month with the warmest seawater is August, 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 rainiest month in San Diego?

December is the month with the most rainfall in San Diego, California. Rain falls for 5.8 days and accumulates 1.65" (42mm) of precipitation.

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

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

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

December has the least sunshine of the year in San Diego, California, with an average of 6.7h of sunshine.
Average temperature - San Diego, CA
Average pressure - San Diego, CA

The month with the highest atmospheric pressure is January (30.09").
Months with the lowest atmospheric pressure are June and September (29.88").

Average wind speed - San Diego, CA

The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).

Average rainfall - San Diego, CA

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.12").

Average rainfall days - San Diego, CA
Average sea temperature - San Diego, CA

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).

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).

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).

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).

Average visibility - San Diego, CA

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).