Climate and monthly weather forecast
Riverside, CA

The neon-lit buildings of Riverside, California, and a silhouette of the high mountain in the back
The neon-lit buildings of Riverside, California, and a silhouette of the high mountain in the back

Weather in January

January, the same as December, is another enjoyable winter month in Riverside, California, with average temperature fluctuating between 65.3°F (18.5°C) and 47.3°F (8.5°C). In January, the average high-temperature is relatively the same as in December - a still enjoyable 65.3°F (18.5°C). Weather in January »

Weather in February

February, the last month of the winter, in Riverside, is another comfortable month, with average temperature fluctuating between 46°F (7.8°C) and 65.1°F (18.4°C). In February, the average high-temperature is relatively the same as in January - a still comfortable 65.1°F (18.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Riverside, is an agreeable month, with average temperature varying between 47.5°F (8.6°C) and 68.7°F (20.4°C). In Riverside, the average high-temperature in March is essentially the same as in February - a pleasant 68.7°F (20.4°C). Weather in March »

Weather in April

April, the same as March, in Riverside, California, is an agreeable spring month, with temperature in the range of an average high of 73°F (22.8°C) and an average low of 50.5°F (10.3°C). In April, the average high-temperature is almost the same as in March - a still pleasant 73°F (22.8°C). Weather in April »

Weather in May

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

Weather in June

June, the first month of the summer, in Riverside, is still a warm month, with temperature in the range of an average low of 58.6°F (14.8°C) and an average high of 84.2°F (29°C). In Riverside, the average high-temperature in June marginally rises, from a warm 76.6°F (24.8°C) in May, to a still moderately hot 84.2°F (29°C). Weather in June »

Weather in July

July is a hot summer month in Riverside, California, with average temperature varying between 90.1°F (32.3°C) and 64.8°F (18.2°C). In Riverside, California, the average high-temperature marginally rises, from a moderately hot 84.2°F (29°C) in June, to a hot 90.1°F (32.3°C). Weather in July »

Weather in August

August, the last month of the summer, in Riverside, is another hot month, with average temperature varying between 66.4°F (19.1°C) and 91.2°F (32.9°C). The warmest month is August, with an average high-temperature of 91.2°F (32.9°C) and an average low-temperature of 66.4°F (19.1°C). The average heat index is calculated to be a tropical 93.7°F (34.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Riverside, is still a hot month, with average temperature ranging between max 88.3°F (31.3°C) and min 64°F (17.8°C). In Riverside, the average high-temperature in September is essentially the same as in August - a still hot 88.3°F (31.3°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Riverside, California, with temperature in the range of an average low of 57.9°F (14.4°C) and an average high of 79.5°F (26.4°C). In Riverside, the average high-temperature in October slightly decreases, from a hot 88.3°F (31.3°C) in September, to a warm 79.5°F (26.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in Riverside, California, with average temperature varying between 71.4°F (21.9°C) and 52°F (11.1°C). In November, the average high-temperature marginally drops, from a moderately hot 79.5°F (26.4°C) in October, to a pleasant 71.4°F (21.9°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Riverside, California, with temperature in the range of an average high of 63.3°F (17.4°C) and an average low of 45.9°F (7.7°C). December is the coldest month, with an average high-temperature of 63.3°F (17.4°C) and an average low-temperature of 45.9°F (7.7°C). Weather in December »
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FAQ

How much does it rain in Riverside?

In Riverside, during the entire year, the rain falls for 49 days and collects up to 7.32" (186mm) of precipitation.

When it does not snow in Riverside?

January, March through December are months without snowfall.

How many days does it snow in Riverside?

Throughout the year, there are 0.1 snowfall days.

What is the wettest month in Riverside?

The wettest months in Riverside are February and December, with an average 1.61" (41mm) of rainfall.

When does it snow in Riverside?

February is the only month when snow falls in Riverside.

When does it snow the most in Riverside?

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

What is the month with the least sunshine in Riverside?

Months with the least sunshine in Riverside are February and December, with an average of 6.8h of sunshine.

What is the most humid month in Riverside?

May is the most humid month, with an average relative humidity of 56%.

What is the driest month in Riverside?

June is the month with the least rainfall in Riverside. Rain falls for 1.1 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Riverside?

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

What is the month with the most sunshine in Riverside?

Months with the most sunshine in Riverside, California, are July and August, with an average of 12.1h of sunshine.

When is the highest UV index in Riverside?

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

What is the warmest month in Riverside?

With an average high-temperature of 91.2°F (32.9°C) and an average low-temperature of 66.4°F (19.1°C), August is the warmest month.

What is the least humid month in Riverside?

With an average relative humidity of 43%, August is the least humid month in Riverside, California.

What is the coldest month in Riverside?

With an average high-temperature of 63.3°F (17.4°C) and an average low-temperature of 45.9°F (7.7°C), December is the coldest month in Riverside, California.

What is the month with the shortest days in Riverside?

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

When is the lowest UV index in Riverside?

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

Average temperature
Riverside, CA

Average temperature - Riverside, CA

The warmest month (with the highest average high temperature) is August (91.2°F).
The month with the lowest average high temperature is December (63.3°F).

The month with the highest average low temperature is August (66.4°F).
The coldest month (with the lowest average low temperature) is December (45.9°F).

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Average pressure
Riverside, CA

Average pressure - Riverside, CA

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.86").

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Average wind speed
Riverside, CA

Average wind speed - Riverside, CA

The windiest month (with the highest average wind speed) is May (5.6mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average rainfall
Riverside, CA

Average rainfall - Riverside, CA

The wettest months (with the highest rainfall) are February and December (1.61").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Riverside, CA

Average rainfall days - Riverside, CA

The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.1 days).

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Average snowfall days
Riverside, CA

Average snowfall days - Riverside, 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
Riverside, CA

Average daylight / Average sunshine - Riverside, 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 July and August (Average sunshine: 12.1h).
Months with the least sunshine are February and December (Average sunshine: 6.8).

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Average sunshine days
Riverside, CA

Average sunshine days - Riverside, CA

The month with the most sunshine days is June (27.9 days).
The month with the least sunshine days is February (21.6 days).

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Average visibility
Riverside, CA

Average visibility - Riverside, 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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