Climate and monthly weather forecast
Riverdale, CA

Weather in January

January, like December, is a moderate winter month in Riverdale, California, with an average temperature varying between 59.4°F (15.2°C) and 44.2°F (6.8°C). In January, the average high-temperature is essentially the same as in December - a still mild 59.4°F (15.2°C). Weather in January »

Weather in February

February, the last month of the winter in Riverdale, is a comfortable month, with an average temperature ranging between min 44.6°F (7°C) and max 62.4°F (16.9°C). In February, the average high-temperature is practically the same as in January - an enjoyable 62.4°F (16.9°C). Weather in February »

Weather in March

March, the first month of the spring in Riverdale, is still a comfortable month, with an average temperature varying between 47.8°F (8.8°C) and 67.8°F (19.9°C). In Riverdale, the average high-temperature in March slightly increases from 62.4°F (16.9°C) in February to a still enjoyable 67.8°F (19.9°C). Weather in March »

Weather in April

April in Riverdale, California, is a warm spring month, with temperature in the range of an average high of 74.8°F (23.8°C) and an average low of 51.4°F (10.8°C). In April, the average high-temperature slightly increases from an enjoyable 67.8°F (19.9°C) in March to a warm 74.8°F (23.8°C). Weather in April »

Weather in May

May, the last month of the spring in Riverdale, is another warm month, with temperature in the range of an average low of 57°F (13.9°C) and an average high of 82.8°F (28.2°C). In May, the average high-temperature slightly increases from a warm 74.8°F (23.8°C) in April to a still moderately hot 82.8°F (28.2°C). Weather in May »

Weather in June

June, the first month of the summer in Riverdale, is a hot month, with an average temperature ranging between min 63.3°F (17.4°C) and max 94.6°F (34.8°C). In Riverdale, the average high-temperature in June increases from a moderately hot 82.8°F (28.2°C) in May to a hot 94.6°F (34.8°C). Weather in June »

Weather in July

July in Riverdale, California, is a very hot summer month, with temperature in the range of an average high of 102.2°F (39°C) and an average low of 66.9°F (19.4°C). With an average high-temperature of 102.2°F (39°C) and an average low-temperature of 66.9°F (19.4°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer in Riverdale, is another torrid month, with an average temperature varying between 100.9°F (38.3°C) and 66.2°F (19°C). In Riverdale, the average high-temperature in August is essentially the same as in July - a still torrid 100.9°F (38.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a hot month in Riverdale, California, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 94.1°F (34.5°C). In September, the average high-temperature slightly decreases from a sweltering 100.9°F (38.3°C) in August to a tropical 94.1°F (34.5°C). Weather in September »

Weather in October

October, like September, in Riverdale, California, is another warm autumn month, with an average temperature fluctuating between 56.5°F (13.6°C) and 80.4°F (26.9°C). In Riverdale, the average high-temperature in October drops from a hot 94.1°F (34.5°C) in September to a warm 80.4°F (26.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Riverdale, is also an enjoyable month, with an average temperature ranging between max 67.3°F (19.6°C) and min 48.7°F (9.3°C). In November, the average high-temperature drops from a moderately hot 80.4°F (26.9°C) in October to a comfortable 67.3°F (19.6°C). Weather in November »

Weather in December

December, the first month of the winter in Riverdale, is also a moderate month, with an average temperature fluctuating between 43°F (6.1°C) and 57.2°F (14°C). With an average high-temperature of 57.2°F (14°C) and an average low-temperature of 43°F (6.1°C), December is the coldest month. Weather in December »
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FAQ

What is the most humid month in Riverdale?

The months with the highest humidity in Riverdale, California, are January and December, with an average relative humidity of 66%.

What is the rainiest month in Riverdale?

The wettest months in Riverdale, California, are January through March, with an average 1.54" (39mm) of rainfall.

How much does it rain in Riverdale?

Throughout the year, in Riverdale, California, there are 58.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

When is the lowest UV index in Riverdale?

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

When is Daylight Saving Time (DST) in Riverdale?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Riverdale?

The month with the longest days is June, with an average of 14h and 37min of daylight.

What is the month with the most sunshine in Riverdale?

The months with the most sunshine are June and July, with an average of 12.1h of sunshine.

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

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

What is the warmest month in Riverdale?

July is the warmest month, with an average high-temperature of 102.2°F (39°C) and an average low-temperature of 66.9°F (19.4°C).

What is the least humid month in Riverdale?

With an average relative humidity of 30%, July is the least humid month in Riverdale, California.

What is the driest month in Riverdale?

August is the month with the least rainfall. Rain falls for 0.8 days and accumulates 0.08" (2mm) of precipitation.

What is the coldest month in Riverdale?

December is the coldest month in Riverdale, with an average high-temperature of 57.2°F (14°C) and an average low-temperature of 43°F (6.1°C).

What is the month with the shortest days in Riverdale?

With an average of 9h and 43min of daylight, December has the shortest days of the year in Riverdale.

What is the month with the least sunshine in Riverdale?

The month with the least sunshine is December, with an average of 6.4h of sunshine.

Average temperature
Riverdale, CA

Average temperature - Riverdale, CA

The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure
Riverdale, CA

Average pressure - Riverdale, CA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed
Riverdale, CA

Average wind speed - Riverdale, CA

The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).

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Average humidity
Riverdale, CA

Average humidity - Riverdale, CA

The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).

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Average rainfall
Riverdale, CA

Average rainfall - Riverdale, CA

The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").

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Average rainfall days
Riverdale, CA

Average rainfall days - Riverdale, CA

The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).

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Average daylight / Average sunshine
Riverdale, CA

Average daylight / Average sunshine - Riverdale, CA

The month with the longest days is June (Average daylight: 14h and 37min).
The month with the shortest days is December (Average daylight: 9h and 43min).

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days
Riverdale, CA

Average sunshine days - Riverdale, CA

The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).

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Average UV index
Riverdale, CA

Average UV index - Riverdale, CA

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).

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Average visibility
Riverdale, CA

Average visibility - Riverdale, CA

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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