Monthly weather forecast and climate
Fontana, CA

Weather in January

January, the same as December, is another enjoyable winter month in Fontana, California, with temperature in the range of an average low of 45.3°F (7.4°C) and an average high of 63.1°F (17.3°C). In January, the average high-temperature is essentially the same as in December - a still comfortable 63.1°F (17.3°C). Weather in January »

Weather in February

The last month of the winter, February, is another comfortable month in Fontana, California, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 63.3°F (17.4°C). In Fontana, the average high-temperature in February is practically the same as in January - a still comfortable 63.3°F (17.4°C). Weather in February »

Weather in March

The first month of the spring, March, is still a comfortable month in Fontana, California, with average temperature ranging between min 46°F (7.8°C) and max 66.7°F (19.3°C). In Fontana, the average high-temperature in March is almost the same as in February - a still comfortable 66.7°F (19.3°C). Weather in March »

Weather in April

April in Fontana, California, is a pleasant spring month, with average temperature varying between 49.6°F (9.8°C) and 72°F (22.2°C). In April, the average high-temperature is practically the same as in March - a pleasant 72°F (22.2°C). Weather in April »

Weather in May

May, the last month of the spring, in Fontana, is a moderately hot month, with average temperature varying between 76.6°F (24.8°C) and 54°F (12.2°C). In Fontana, the average high-temperature in May is essentially the same as in April - a warm 76.6°F (24.8°C). Weather in May »

Weather in June

June, the first month of the summer, in Fontana, is also a moderately hot month, with average temperature ranging between min 59.2°F (15.1°C) and max 85.3°F (29.6°C). In June, the average high-temperature slightly increases, from a warm 76.6°F (24.8°C) in May, to a still moderately hot 85.3°F (29.6°C). Weather in June »

Weather in July

July in Fontana, California, is a tropical summer month, with temperature in the range of an average high of 91°F (32.8°C) and an average low of 65.8°F (18.8°C). In July, the average high-temperature slightly increases, from a moderately hot 85.3°F (29.6°C) in June, to a tropical 91°F (32.8°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in Fontana, California, with temperature in the range of an average high of 92.1°F (33.4°C) and an average low of 67.3°F (19.6°C). With an average high-temperature of 92.1°F (33.4°C) and an average low-temperature of 67.3°F (19.6°C), August is the warmest month. Weather in August »

Weather in September

September, the first month of the autumn, in Fontana, is also a hot month, with temperature in the range of an average low of 63.9°F (17.7°C) and an average high of 88.3°F (31.3°C). In Fontana, the average high-temperature is practically the same as in August - a still tropical 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Fontana, California, with average temperature ranging between max 78.8°F (26°C) and min 57.2°F (14°C). In Fontana, the average high-temperature decreases, from a hot 88.3°F (31.3°C) in September, to a warm 78.8°F (26°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Fontana, California, with average temperature ranging between min 50.5°F (10.3°C) and max 69.3°F (20.7°C). In Fontana, the average high-temperature decreases, from a moderately hot 78.8°F (26°C) in October, to an agreeable 69.3°F (20.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Fontana, California, with average temperature fluctuating between 44.2°F (6.8°C) and 60.8°F (16°C). With an average high-temperature of 60.8°F (16°C) and an average low-temperature of 44.2°F (6.8°C), December is the coldest month. Weather in December »
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FAQ

How many days does it rain in Fontana?

Throughout the year, there are 48.1 rainfall days, and 6.89" (175mm) of precipitation is accumulated.

How many days does it snow in Fontana?

In Fontana, during the entire year, snow falls for 0.1 days.

When it does not snow in Fontana?

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

What are the most humid months in Fontana?

Months with the highest humidity in Fontana, California, are February, March and May, with an average relative humidity of 52%.

What is the wettest month in Fontana?

February is the month with the most rainfall. Rain falls for 6.2 days and accumulates 1.57" (40mm) of precipitation.

When does it snow in Fontana?

The only month with snowfall in Fontana, California, is February.

When does it snow the most in Fontana?

The month with the most snowfall days is February when snow falls for 0.1 days.

What is the driest month in Fontana?

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

When are the longest days in Fontana?

June has the longest days of the year in Fontana, California, with an average of 14.4h of daylight.

What is the month with the most sunshine in Fontana?

Months with the most sunshine are June through August, with an average of 12.1h of sunshine.

What are the months with the highest UV index in Fontana?

Months with the highest UV index in Fontana are July and August, with an average maximum UV index of 7.

What is the warmest month in Fontana?

August is the warmest month in Fontana, with an average high-temperature of 92.1°F (33.4°C) and an average low-temperature of 67.3°F (19.6°C).

What is the least humid month in Fontana?

The least humid month in Fontana is August, with an average relative humidity of 39%.

What is the coldest month in Fontana?

December is the coldest month in Fontana, with an average high-temperature of 60.8°F (16°C) and an average low-temperature of 44.2°F (6.8°C).

What is the month with the shortest days in Fontana?

December has the shortest days of the year, with an average of 9.9h of daylight.

What is the month with the least sunshine in Fontana?

December has the least sunshine of the year, with an average of 6.9h of sunshine.

What is the month with the lowest UV index in Fontana?

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

Average temperature
Fontana, CA

Average temperature - Fontana, CA

The warmest month (with the highest average high temperature) is August (92.1°F).
The month with the lowest average high temperature is December (60.8°F).

The month with the highest average low temperature is August (67.3°F).
The coldest months (with the lowest average low temperature) are February and December (44.2°F).

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Average pressure
Fontana, CA

Average pressure - Fontana, 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
Fontana, CA

Average wind speed - Fontana, 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
Fontana, CA

Average humidity - Fontana, CA

Months with the highest relative humidity are February, March and May (52%).
The month with the lowest relative humidity is August (39%).

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Average rainfall
Fontana, CA

Average rainfall - Fontana, CA

The wettest month (with the highest rainfall) is February (1.57").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Fontana, CA

Average rainfall days - Fontana, CA

The month with the highest number of rainy days is March (7.5 days).
The month with the least rainy days is June (1.2 days).

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Average snowfall days
Fontana, CA

Average snowfall days - Fontana, 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
Fontana, CA

Average daylight / Average sunshine - Fontana, 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).

Months with the most sunshine are June, July and August (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.9h).

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Average sunshine days
Fontana, CA

Average sunshine days - Fontana, CA

The month with the most sunshine days is June (28.3 days).
The month with the least sunshine days is February (21.1 days).

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Average visibility
Fontana, CA

Average visibility - Fontana, 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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