Monthly weather forecast and climate
San Bernardino, CA

Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains
Scenic settlement spot on the foot of the iconic San Bernardino Mountains in California, with a view of the snow peaks of the San Gorgiono mountains

Weather in January

January is an enjoyable winter month in San Bernardino, California, with temperature in the range of an average high of 62.2°F (16.8°C) and an average low of 44.6°F (7°C). In January, the average high-temperature is essentially the same as in December - an enjoyable 62.2°F (16.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also an enjoyable month in San Bernardino, California, with average temperature ranging between max 62.4°F (16.9°C) and min 43.5°F (6.4°C). In February, the average high-temperature is essentially the same as in January - a still comfortable 62.4°F (16.9°C). Weather in February »

Weather in March

The first month of the spring, March, is also an enjoyable month in San Bernardino, California, with average temperature fluctuating between 66.9°F (19.4°C) and 45.7°F (7.6°C). In San Bernardino, the average high-temperature is practically the same as in February - a still enjoyable 66.9°F (19.4°C). Weather in March »

Weather in April

April in San Bernardino, California, is an agreeable spring month, with average temperature ranging between max 71.4°F (21.9°C) and min 48.7°F (9.3°C). In San Bernardino, the average high-temperature is practically the same as in March - a pleasant 71.4°F (21.9°C). Weather in April »

Weather in May

May, the last month of the spring, in San Bernardino, is a warm month, with average temperature fluctuating between 76.5°F (24.7°C) and 52.7°F (11.5°C). In San Bernardino, the average high-temperature is relatively the same as in April - a moderately hot 76.5°F (24.7°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in San Bernardino, California, with temperature in the range of an average low of 58.5°F (14.7°C) and an average high of 85.1°F (29.5°C). In June, the average high-temperature slightly increases, from 76.5°F (24.7°C) in May, to a still warm 85.1°F (29.5°C). Weather in June »

Weather in July

July is a hot summer month in San Bernardino, California, with average temperature varying between 91°F (32.8°C) and 64.9°F (18.3°C). In San Bernardino, the average high-temperature in July slightly increases, from a moderately hot 85.1°F (29.5°C) in June, to a hot 91°F (32.8°C). Weather in July »

Weather in August

August, the last month of the summer, in San Bernardino, is another hot month, with average temperature varying between 65.8°F (18.8°C) and 91.9°F (33.3°C). August is the warmest month, with an average high-temperature of 91.9°F (33.3°C) and an average low-temperature of 65.8°F (18.8°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a hot month in San Bernardino, California, with average temperature fluctuating between 63.3°F (17.4°C) and 87.4°F (30.8°C). In September, the average high-temperature is essentially the same as in August - a still hot 87.4°F (30.8°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in San Bernardino, California, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 78.1°F (25.6°C). In San Bernardino, the average high-temperature in October drops, from a hot 87.4°F (30.8°C) in September, to a warm 78.1°F (25.6°C). Weather in October »

Weather in November

November, the last month of the autumn, in San Bernardino, is also an agreeable month, with average temperature ranging between min 49.1°F (9.5°C) and max 68.9°F (20.5°C). In San Bernardino, the average high-temperature decreases, from a moderately hot 78.1°F (25.6°C) in October, to a pleasant 68.9°F (20.5°C). Weather in November »

Weather in December

December, the first month of the winter, in San Bernardino, is also a moderate month, with average temperature varying between 59.9°F (15.5°C) and 43.7°F (6.5°C). The coldest month is December, with an average high-temperature of 59.9°F (15.5°C) and an average low-temperature of 43.7°F (6.5°C). Weather in December »
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FAQ

How many days does it rain in San Bernardino?

Throughout the year, there are 46.6 rainfall days, and 6.18" (157mm) of precipitation is accumulated.

How many days does it snow in San Bernardino?

Throughout the year, there are 0.1 snowfall days.

When it does not snow in San Bernardino?

In San Bernardino, California, snow does not fall in January, March through December.

What is the most humid month in San Bernardino?

The most humid month in San Bernardino is February, with an average relative humidity of 53%.

When does it snow in San Bernardino?

February is the only month when snow falls.

When does it snow the most in San Bernardino?

February has the most snowfall days of the year. Snow falls for 0.1 days.

What is the driest month in San Bernardino?

The month with the least rainfall is June when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.

When are the longest days in San Bernardino?

With an average of 14.4h of daylight, June has the longest days of the year in San Bernardino, California.

When is the highest UV index in San Bernardino?

Months with the highest UV index are June through August, with an average maximum UV index of 7.

What month has the most sunshine in San Bernardino?

July has the most sunshine of the year in San Bernardino, California, with an average of 12.2h of sunshine.

What is the warmest month in San Bernardino?

August is the warmest month, with an average high-temperature of 91.9°F (33.3°C) and an average low-temperature of 65.8°F (18.8°C).

What is the least humid month in San Bernardino?

August is the least humid month in San Bernardino, with an average relative humidity of 38%.

What is the coldest month in San Bernardino?

With an average high-temperature of 59.9°F (15.5°C) and an average low-temperature of 43.7°F (6.5°C), December is the coldest month.

What is the rainiest month in San Bernardino?

December is the month with the most rainfall. Rain falls for 6 days and accumulates 1.42" (36mm) of precipitation.

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

With an average of 9.9h of daylight, December has the shortest days of the year in San Bernardino.

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

With an average of 6.9h of sunshine, December has the least sunshine of the year in San Bernardino, California.

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

The month with the lowest UV index is December, with an average maximum UV index of 3.

Average temperature
San Bernardino, CA

Average temperature - San Bernardino, CA

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).

The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).

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Average pressure
San Bernardino, CA

Average pressure - San Bernardino, CA

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.85").

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Average wind speed
San Bernardino, CA

Average wind speed - San Bernardino, CA

The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

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Average humidity
San Bernardino, CA

Average humidity - San Bernardino, CA

The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).

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Average rainfall
San Bernardino, CA

Average rainfall - San Bernardino, CA

The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
San Bernardino, CA

Average rainfall days - San Bernardino, CA

The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days
San Bernardino, CA

Average snowfall days - San Bernardino, CA

The month with the highest number of snowfall days is February (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).

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Average daylight / Average sunshine
San Bernardino, CA

Average daylight / Average sunshine - San Bernardino, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

The month with the most sunshine is July (Average sunshine: 12.2h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days
San Bernardino, CA

Average sunshine days - San Bernardino, CA

Months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).

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Average visibility
San Bernardino, CA

Average visibility - San Bernardino, 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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