Monthly weather forecast and climate
San Ramon, CA

A street in San Ramon, California, featuring a stunning beauty of golden and brown trees on both sides of the road, during autumn
A street in San Ramon, California, featuring a stunning beauty of golden and brown trees on both sides of the road, during autumn

Weather in January

January, like December, is a moderate winter month in San Ramon, California, with temperature in the range of an average high of 57°F (13.9°C) and an average low of 42.3°F (5.7°C). In January, the average high-temperature is relatively the same as in December - a still moderate 57°F (13.9°C). Weather in January »

Weather in February

February, the last month of the winter, in San Ramon, is another mild month, with temperature in the range of an average low of 42.4°F (5.8°C) and an average high of 59.7°F (15.4°C). In San Ramon, the average high-temperature is relatively the same as in January - a still moderate 59.7°F (15.4°C). Weather in February »

Weather in March

March, the first month of the spring, in San Ramon, is an enjoyable month, with average temperature fluctuating between 43.5°F (6.4°C) and 62.8°F (17.1°C). In March, the average high-temperature is practically the same as in February - a comfortable 62.8°F (17.1°C). Weather in March »

Weather in April

April, like March, in San Ramon, California, is another enjoyable spring month, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 45.3°F (7.4°C). In San Ramon, the average high-temperature is practically the same as in March - a still enjoyable 67.6°F (19.8°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in San Ramon, California, with average temperature ranging between min 48.7°F (9.3°C) and max 72.5°F (22.5°C). In May, the average high-temperature is essentially the same as in April - an agreeable 72.5°F (22.5°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in San Ramon, California, with average temperature ranging between min 53.2°F (11.8°C) and max 80.2°F (26.8°C). In San Ramon, California, the average high-temperature marginally rises, from an agreeable 72.5°F (22.5°C) in May, to a warm 80.2°F (26.8°C). Weather in June »

Weather in July

July, like June, in San Ramon, California, is another warm summer month, with average temperature varying between 83.7°F (28.7°C) and 55°F (12.8°C). July is the warmest month, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 55°F (12.8°C). The average heat index is estimated at a hot 86.5°F (30.3°C). Weather in July »

Weather in August

August, the last month of the summer, in San Ramon, is also a moderately hot month, with average temperature fluctuating between 55.9°F (13.3°C) and 83.3°F (28.5°C). In San Ramon, the average high-temperature is almost the same as in July - a still moderately hot 83.3°F (28.5°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in San Ramon, California, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 56.5°F (13.6°C). In San Ramon, the average high-temperature in September is relatively the same as in August - a still warm 82°F (27.8°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in San Ramon, California, with average temperature ranging between max 74.3°F (23.5°C) and min 53.4°F (11.9°C). In October, the average high-temperature slightly decreases, from 82°F (27.8°C) in September, to a still moderately hot 74.3°F (23.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another comfortable month in San Ramon, California, with average temperature fluctuating between 46.8°F (8.2°C) and 64°F (17.8°C). In November, the average high-temperature decreases, from a warm 74.3°F (23.5°C) in October, to a comfortable 64°F (17.8°C). Weather in November »

Weather in December

December, the first month of the winter, in San Ramon, is still a mild month, with average temperature ranging between min 42.1°F (5.6°C) and max 55.9°F (13.3°C). With an average high-temperature of 55.9°F (13.3°C) and an average low-temperature of 42.1°F (5.6°C), December is the coldest month. Weather in December »
[Resources]

FAQ

How much does it rain in San Ramon?

In San Ramon, California, during the entire year, the rain falls for 67.2 days and collects up to 10.98" (279mm) of precipitation.

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

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

What is the rainiest month in San Ramon?

The month with the most rainfall in San Ramon, California, is February when the rain falls for 8.3 days and typically aggregates up to 2.28" (58mm) of precipitation.

What is the most humid month in San Ramon?

With an average relative humidity of 74%, March is the most humid month in San Ramon.

When are the longest days in San Ramon?

The month with the longest days in San Ramon, California, is June, with an average of 14.7h of daylight.

When is the highest UV index in San Ramon?

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

What is the warmest month in San Ramon?

With an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 55°F (12.8°C), July is the warmest month.

What is the driest month in San Ramon?

July is the only month when rain does not fall.

What month has the most sunshine in San Ramon?

The month with the most sunshine is July, with an average of 12.1h of sunshine.

When does it rain in San Ramon?

Months with rainfall in San Ramon are January through June, August through December.

What is the least humid month in San Ramon?

The least humid month in San Ramon is September, with an average relative humidity of 57%.

What is the coldest month in San Ramon?

The coldest month in San Ramon, California, is December, with an average high-temperature of 55.9°F (13.3°C) and an average low-temperature of 42.1°F (5.6°C).

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

December has the shortest days of the year, with an average of 9.6h of daylight.

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

December has the least sunshine of the year in San Ramon, with an average of 5.8h of sunshine.

Average temperature
San Ramon, CA

Average temperature - San Ramon, CA

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (55.9°F).

The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (42.1°F).

[Resources]

Average pressure
San Ramon, CA

Average pressure - San Ramon, CA

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

[Resources]

Average wind speed
San Ramon, CA

Average wind speed - San Ramon, CA

The windiest month (with the highest average wind speed) is May (6.7mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

[Resources]

Average rainfall
San Ramon, CA

Average rainfall - San Ramon, CA

The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0").

[Resources]

Average rainfall days
San Ramon, CA

Average rainfall days - San Ramon, CA

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).

[Resources]

Average daylight / Average sunshine
San Ramon, CA

Average daylight / Average sunshine - San Ramon, 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: 5.8h).

[Resources]

Average sunshine days
San Ramon, CA

Average sunshine days - San Ramon, CA

The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is March (17.5 days).

[Resources]

Average UV index
San Ramon, CA

Average UV index - San Ramon, 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).

[Resources]

Average visibility
San Ramon, CA

Average visibility - San Ramon, 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).

[Resources]