Climate and monthly weather forecast
Rio Vista, CA

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Weather in January

January in Rio Vista, California, is a refreshing winter month, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 55.9°F (13.3°C). January's weather records an average high-temperature of a moderate 55.9°F (13.3°C), showing little deviation from December. Weather in January »

Weather in February

February, the last month of the winter in Rio Vista, is another refreshing month, with an average temperature varying between 59.7°F (15.4°C) and 42.3°F (5.7°C). With the advent of February, Rio Vista experiences an average high-temperature of a still mild 59.7°F (15.4°C), mirroring a close resemblance to the previous month. Weather in February »

Weather in March

March, the first month of the spring in Rio Vista, is an enjoyable month, with temperature in the range of an average low of 43.7°F (6.5°C) and an average high of 63.7°F (17.6°C). Rio Vista, California, signifies an average high-temperature of a still refreshing 63.7°F (17.6°C) in March, closely mirroring the 59.7°F (15.4°C) of February. Weather in March »

Weather in April

April is a pleasant spring month in Rio Vista, California, with an average temperature varying between 69.6°F (20.9°C) and 46.8°F (8.2°C). The commencement of April sees a minor shift in the average high-temperature, moving from an enjoyable 63.7°F (17.6°C) in March to a pleasant 69.6°F (20.9°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Rio Vista, California, with an average temperature ranging between max 76.6°F (24.8°C) and min 51.1°F (10.6°C). Rio Vista's weather shows a minor temperature rise with the arrival of May, moving from a pleasant 69.6°F (20.9°C) in April to a warm 76.6°F (24.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Rio Vista, California, with an average temperature fluctuating between 86.5°F (30.3°C) and 55.8°F (13.2°C). The beginning of June marks a shift in the average high-temperature, moving from May's moderately hot 76.6°F (24.8°C) to a tropical 86.5°F (30.3°C). Weather in June »

Weather in July

July, like June, is a hot summer month in Rio Vista, California, with an average temperature varying between 57.2°F (14°C) and 91°F (32.8°C). July is the month when Rio Vista experiences its warmest temperatures, averaging a high of 91°F (32.8°C) and a low of 57.2°F (14°C). July's mean heat index is computed to be a sweltering 96.8°F (36°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Rio Vista, California, with an average temperature varying between 90.1°F (32.3°C) and 57.7°F (14.3°C). Rio Vista's shift into August is marked by a subtle change to a still hot 90.1°F (32.3°C) from July's 91°F (32.8°C) in temperature. Weather in August »

Weather in September

The first month of the autumn, September, is still a tropical month in Rio Vista, California, with an average temperature ranging between max 86.9°F (30.5°C) and min 58.1°F (14.5°C). The weather during September records an average high-temperature of a still hot 86.9°F (30.5°C), closely mirroring the preceding month. Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Rio Vista, California, with an average temperature fluctuating between 54.1°F (12.3°C) and 76.5°F (24.7°C). The average high-temperature drops in October, from September's hot 86.9°F (30.5°C) to a warm 76.5°F (24.7°C). Weather in October »

Weather in November

November, the last month of the autumn in Rio Vista, is another refreshing month, with an average temperature varying between 46.4°F (8°C) and 63.9°F (17.7°C). With November's onset, the weather shows a temperature decrease, transitioning from a moderately hot 76.5°F (24.7°C) in October to a refreshing 63.9°F (17.7°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Rio Vista, California, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 55°F (12.8°C). The coldest time of the year is December, with temperatures averaging a high of 55°F (12.8°C) and a low of 41.7°F (5.4°C). Weather in December »
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Frequently asked questions

What are the most humid months in Rio Vista?

January and March, with an average relative humidity of 74%, are most humid months in Rio Vista, California.

How much does it rain in Rio Vista?

In Rio Vista, during the entire year, the rain falls for 68.7 days and collects up to 11.18" (284mm) of precipitation.

What are the months with the lowest UV index in Rio Vista?

The months with the lowest UV index in Rio Vista are January, February, November and December, with an average maximum UV index of 3.

What is the rainiest month in Rio Vista?

February is the month with the most rainfall in Rio Vista, California. Rain falls for 8.6 days and accumulates 2.17" (55mm) of precipitation.

When is Daylight Saving Time (DST) in Rio Vista?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.

When are the longest days in Rio Vista?

With an average of 14h and 48min of daylight, June has the longest days of the year in Rio Vista.

When is the highest UV index in Rio Vista?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Rio Vista.

What is the hottest time of year in Rio Vista?

Rio Vista, California, notes the warmest temperatures in July, with a average high of 91°F (32.8°C) and a low of 57.2°F (14°C).

What month has the most sunshine in Rio Vista?

With an average of 12.1h of sunshine, July has the most sunshine of the year in Rio Vista.

What is the driest month in Rio Vista?

The only month without rainfall is August.

What is the least humid month in Rio Vista?

With an average relative humidity of 49%, September is the least humid month.

When does it rain in Rio Vista?

Months with rainfall in Rio Vista, California, are January through July, September through December.

What month is the coldest in Rio Vista?

December stands out as Rio Vista's coldest month, with an average high-temperature of 55°F (12.8°C) and a low-temperature of 41.7°F (5.4°C).

What is the month with the shortest days in Rio Vista?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

What is the month with the least sunshine in Rio Vista?

The month with the least sunshine in Rio Vista is December, with an average of 5.9h of sunshine.

Average temperature
Rio Vista, CA

Average temperature - Rio Vista, CA

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).

The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure
Rio Vista, CA

Average pressure - Rio Vista, CA

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed
Rio Vista, CA

Average wind speed - Rio Vista, CA

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity
Rio Vista, CA

Average humidity - Rio Vista, CA

The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).

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Average rainfall
Rio Vista, CA

Average rainfall - Rio Vista, CA

The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").

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Average rainfall days
Rio Vista, CA

Average rainfall days - Rio Vista, CA

The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).

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Average daylight / Average sunshine
Rio Vista, CA

Average daylight / Average sunshine - Rio Vista, CA

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days
Rio Vista, CA

Average sunshine days - Rio Vista, CA

The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index
Rio Vista, CA

Average UV index - Rio Vista, CA

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
Rio Vista, CA

Average visibility - Rio Vista, 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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Rio Vista, California, USA

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