Monthly weather forecast and climate
Riverdale, CA

Weather in January

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

Weather in February

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

Weather in March

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

Weather in April

April is a moderately hot spring month in Riverdale, California, 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 Riverdale, the average high-temperature slightly increases, from an enjoyable 67.8°F (19.9°C) in March, to a moderately hot 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 average temperature ranging between min 57°F (13.9°C) and max 82.8°F (28.2°C). In May, the average high-temperature slightly increases, from a moderately hot 74.8°F (23.8°C) in April, to a still warm 82.8°F (28.2°C). Weather in May »

Weather in June

June, the first month of the summer, in Riverdale, is a tropical month, with average temperature fluctuating between 63.3°F (17.4°C) and 94.6°F (34.8°C). In Riverdale, the average high-temperature rises, from a warm 82.8°F (28.2°C) in May, to a hot 94.6°F (34.8°C). Weather in June »

Weather in July

July is a very hot summer month in Riverdale, California, with average temperature varying between 66.9°F (19.4°C) and 102.2°F (39°C). 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). Weather in July »

Weather in August

August, the last month of the summer, in Riverdale, is another very hot month, with temperature in the range of an average high of 100.9°F (38.3°C) and an average low of 66.2°F (19°C). In Riverdale, California, the average high-temperature is almost the same as in July - a still very hot 100.9°F (38.3°C). Weather in August »

Weather in September

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

Weather in October

October, like September, in Riverdale, California, is another warm autumn month, with average temperature varying between 56.5°F (13.6°C) and 80.4°F (26.9°C). In Riverdale, the average high-temperature in October decreases, from a hot 94.1°F (34.5°C) in September, to a moderately hot 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 temperature in the range of an average high of 67.3°F (19.6°C) and an average low of 48.7°F (9.3°C). In Riverdale, the average high-temperature drops, from a warm 80.4°F (26.9°C) in October, to an enjoyable 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 average temperature varying between 43°F (6.1°C) and 57.2°F (14°C). The coldest month is December, with an average high-temperature of 57.2°F (14°C) and an average low-temperature of 43°F (6.1°C). Weather in December »
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FAQ

What are the most humid months in Riverdale?

January and December, with an average relative humidity of 66%, are most humid months in Riverdale, California.

How much does it rain in Riverdale?

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

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.

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

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

When are the longest days in Riverdale?

The month with the longest days is June, with an average of 14.6h of daylight.

What are the months with the most sunshine in Riverdale?

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

When is 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?

July is the least humid month, with an average relative humidity of 30%.

What is the driest month in Riverdale?

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

What is the coldest month in Riverdale?

The coldest month is December, 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?

December has the shortest days of the year, with an average of 9.7h of daylight.

What is the month with the least sunshine in Riverdale?

December has the least sunshine of the year in Riverdale, California, 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").
The month with the lowest atmospheric pressure is June (29.89").

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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

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: 14.6h).
The month with the shortest days is December (Average daylight: 9.7h).

Months with the most sunshine are June and July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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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

Months with the highest UV index are June, July and August (UV index 7).
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

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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