Climate and monthly weather forecast
Riverdale, CA

Weather in January

January, the same as December, in Riverdale, California, is a moderate winter month, with temperature in the range of an average high of 59.4°F (15.2°C) and an average low of 44.2°F (6.8°C). In Riverdale, California, the average high-temperature in January is essentially the same as in December - a still moderate 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 fluctuating between 44.6°F (7°C) and 62.4°F (16.9°C). In February, the average high-temperature is relatively the same as in January - a comfortable 62.4°F (16.9°C). Weather in February »

Weather in March

March, the first month of the spring in Riverdale, is also an enjoyable month, with temperature in the range of an average low of 47.8°F (8.8°C) and an average high of 67.8°F (19.9°C). In March, the average high-temperature slightly increases 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 an average temperature ranging between max 74.8°F (23.8°C) and min 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 moderately hot 74.8°F (23.8°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderately hot month in Riverdale, California, with an average temperature fluctuating between 57°F (13.9°C) and 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

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

Weather in July

July in Riverdale, California, is a sweltering summer month, with an average temperature ranging between max 102.2°F (39°C) and min 66.9°F (19.4°C). The warmest month is July, 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

The last month of the summer, August, is another very hot month in Riverdale, California, with an average temperature ranging between max 100.9°F (38.3°C) and min 66.2°F (19°C). In August, the average high-temperature is essentially 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 still a hot month in Riverdale, California, with an average temperature varying between 63.1°F (17.3°C) and 94.1°F (34.5°C). In Riverdale, the average high-temperature in September marginally drops from a very hot 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 temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 80.4°F (26.9°C). In October, the average high-temperature 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

The last month of the autumn, November, is also an enjoyable month in Riverdale, California, with an average temperature ranging between max 67.3°F (19.6°C) and min 48.7°F (9.3°C). In Riverdale, the average high-temperature in November decreases 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 an 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 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 wettest month in Riverdale?

The months with the most rainfall are January through March, with an average 1.54" (39mm) of precipitation.

How many days does it rain in Riverdale?

In Riverdale, during the entire year, the rain falls for 58.2 days and collects up to 9.29" (236mm) of precipitation.

What is the month with 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.

When is Daylight Saving Time (DST) in Riverdale?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Riverdale, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Riverdale?

June has the longest days of the year, with an average of 14h and 37min 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?

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

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.

What is the driest month in Riverdale?

The month with the least rainfall in Riverdale, California, is August, when the rain falls for 0.8 days and typically collects 0.08" (2mm) of precipitation.

What 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), December is the coldest month.

What is the month with the shortest days in Riverdale?

The month with the shortest days is December, with an average of 9h and 43min of daylight.

What is the month with the least sunshine in Riverdale?

December has the least sunshine of the year, 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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