Monthly weather forecast and climate
San Jose, CA

A sunset panorama of the lit city of San Jose, California
A sunset panorama of the lit city of San Jose, California

Weather in January

January, the same as December, in San Jose, California, is another mild winter month, with average temperature varying between 58.1°F (14.5°C) and 43.3°F (6.3°C). In January, the average high-temperature is practically the same as in December - a still moderate 58.1°F (14.5°C). Weather in January »

Weather in February

The last month of the winter, February, is also a moderate month in San Jose, California, with average temperature fluctuating between 43.2°F (6.2°C) and 59.7°F (15.4°C). In February, the average high-temperature is practically the same as in January - a still moderate 59.7°F (15.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in San Jose, California, with temperature in the range of an average high of 62.2°F (16.8°C) and an average low of 43.9°F (6.6°C). In March, the average high-temperature is almost the same as in February - a comfortable 62.2°F (16.8°C). Weather in March »

Weather in April

April, the same as March, is another enjoyable spring month in San Jose, California, with average temperature varying between 45.5°F (7.5°C) and 66.7°F (19.3°C). In April, the average high-temperature is relatively the same as in March - a still enjoyable 66.7°F (19.3°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in San Jose, California, with average temperature fluctuating between 48.9°F (9.4°C) and 70.5°F (21.4°C). In San Jose, the average high-temperature is almost the same as in April - an agreeable 70.5°F (21.4°C). Weather in May »

Weather in June

June, the first month of the summer, in San Jose, is a warm month, with average temperature ranging between max 78.4°F (25.8°C) and min 53.2°F (11.8°C). In June, the average high-temperature slightly increases, from a pleasant 70.5°F (21.4°C) in May, to a warm 78.4°F (25.8°C). Weather in June »

Weather in July

July, like June, in San Jose, California, is a moderately hot summer month, with average temperature varying between 55.2°F (12.9°C) and 82°F (27.8°C). July is the warmest month, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 55.2°F (12.9°C). In July, the average heat index is appraised at 84.6°F (29.2°C). Weather in July »

Weather in August

August, the last month of the summer, in San Jose, is also a moderately hot month, with average temperature varying between 81.9°F (27.7°C) and 56.5°F (13.6°C). In August, the average high-temperature is practically the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

Weather in September

September, the first month of the autumn, in San Jose, is still a warm month, with temperature in the range of an average high of 79.7°F (26.5°C) and an average low of 55.6°F (13.1°C). In San Jose, the average high-temperature is relatively the same as in August - a still warm 79.7°F (26.5°C). Weather in September »

Weather in October

October, the same as September, in San Jose, California, is another pleasant autumn month, with average temperature ranging between min 52.7°F (11.5°C) and max 72.7°F (22.6°C). In San Jose, the average high-temperature in October marginally drops, from a moderately hot 79.7°F (26.5°C) in September, to a pleasant 72.7°F (22.6°C). Weather in October »

Weather in November

November, the last month of the autumn, in San Jose, is another comfortable month, with average temperature fluctuating between 63.9°F (17.7°C) and 47.3°F (8.5°C). In San Jose, the average high-temperature marginally drops, from an agreeable 72.7°F (22.6°C) in October, to an enjoyable 63.9°F (17.7°C). Weather in November »

Weather in December

December, the first month of the winter, in San Jose, is also a moderate month, with average temperature ranging between min 43°F (6.1°C) and max 56.5°F (13.6°C). December is the coldest month, with an average high-temperature of 56.5°F (13.6°C) and an average low-temperature of 43°F (6.1°C). Weather in December »
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FAQ

How much does it rain in San Jose?

In San Jose, California, during the entire year, the rain falls for 51.5 days and collects up to 4.06" (103mm) of precipitation.

When is the lowest UV index in San Jose?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in San Jose.

What is the most humid month in San Jose?

March is the most humid month in San Jose, California, with an average relative humidity of 73%.

What is the rainiest month in San Jose?

March is the month with the most rainfall in San Jose. Rain falls for 9.8 days and accumulates 0.83" (21mm) of precipitation.

What is the driest month in San Jose?

Months with the least rainfall are June through August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

When are the longest days in San Jose?

With an average of 14.7h of daylight, June has the longest days of the year.

What is the month with the highest UV index in San Jose?

June through August, with an average maximum UV index of 6, are months with the highest UV index in San Jose.

What is the warmest month in San Jose?

With an average high-temperature of 82°F (27.8°C) and an average low-temperature of 55.2°F (12.9°C), July is the warmest month.

What is the least humid month in San Jose?

July and September, with an average relative humidity of 60%, are the least humid months in San Jose, California.

What month has the most sunshine in San Jose?

July has the most sunshine of the year in San Jose, with an average of 12.1h of sunshine.

What is the coldest month in San Jose?

December is the coldest month in San Jose, California, with an average high-temperature of 56.5°F (13.6°C) and an average low-temperature of 43°F (6.1°C).

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

The month with the shortest days is December, with an average of 9.6h of daylight.

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

December has the least sunshine of the year in San Jose, with an average of 6h of sunshine.

Average temperature
San Jose, CA

Average temperature - San Jose, CA

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (56.5°F).

The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure
San Jose, CA

Average pressure - San Jose, CA

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed
San Jose, CA

Average wind speed - San Jose, CA

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.4mph).

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Average humidity
San Jose, CA

Average humidity - San Jose, CA

The month with the highest relative humidity is March (73%).
Months with the lowest relative humidity are July and September (60%).

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Average rainfall
San Jose, CA

Average rainfall - San Jose, CA

The wettest month (with the highest rainfall) is March (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

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Average rainfall days
San Jose, CA

Average rainfall days - San Jose, CA

The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is August (0.4 days).

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Average daylight / Average sunshine
San Jose, CA

Average daylight / Average sunshine - San Jose, CA

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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Average sunshine days
San Jose, CA

Average sunshine days - San Jose, CA

The month with the most sunshine days is August (29.7 days).
The month with the least sunshine days is March (19.5 days).

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Average UV index
San Jose, CA

Average UV index - San Jose, CA

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
San Jose, CA

Average visibility - San Jose, 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).

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