Rio Vista
California, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Rio Vista, CA

January is a mild winter month in Rio Vista, California, with average temperature ranging between min 41.5°F (5.3°C) and max 55.9°F (13.3°C). In Rio Vista, the average high-temperature is almost the same as in December - a moderate 55.9°F (13.3°C). Weather in January »

February, the last month of the winter, in Rio Vista, is another mild month, with temperature in the range of an average high of 59.7°F (15.4°C) and an average low of 42.3°F (5.7°C). In Rio Vista, the average high-temperature is almost the same as in January - a still mild 59.7°F (15.4°C). Weather in February »

The first month of the spring, March, is an enjoyable month in Rio Vista, California, with temperature in the range of an average high of 63.7°F (17.6°C) and an average low of 43.7°F (6.5°C). In Rio Vista, the average high-temperature is almost the same as in February - an enjoyable 63.7°F (17.6°C). Weather in March »

April in Rio Vista, California, is a pleasant spring month, with temperature in the range of an average high of 69.6°F (20.9°C) and an average low of 46.8°F (8.2°C). In April, the average high-temperature slightly increases, from a comfortable 63.7°F (17.6°C) in March, to an agreeable 69.6°F (20.9°C). Weather in April »

The last month of the spring, May, is a moderately hot month in Rio Vista, California, with average temperature fluctuating between 51.1°F (10.6°C) and 76.6°F (24.8°C). In Rio Vista, the average high-temperature slightly increases, from an agreeable 69.6°F (20.9°C) in April, to a moderately hot 76.6°F (24.8°C). Weather in May »

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

July, like June, is another tropical summer month in Rio Vista, California, with average temperature varying between 57.2°F (14°C) and 91°F (32.8°C). With an average high-temperature of 91°F (32.8°C) and an average low-temperature of 57.2°F (14°C), July is the warmest month. The average heat index in July is estimated at a very hot 96.6°F (35.9°C). Weather in July »

August, the last month of the summer, in Rio Vista, is another hot month, with average temperature varying between 90.1°F (32.3°C) and 57.7°F (14.3°C). In Rio Vista, the average high-temperature is practically the same as in July - a still tropical 90.1°F (32.3°C). Weather in August »

The first month of the autumn, September, is still a tropical month in Rio Vista, California, with average temperature varying between 58.1°F (14.5°C) and 86.9°F (30.5°C). In September, the average high-temperature is almost the same as in August - a still tropical 86.9°F (30.5°C). Weather in September »

October, the same as September, is a moderately hot autumn month in Rio Vista, California, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 54.1°F (12.3°C). In October, the average high-temperature decreases, from a hot 86.9°F (30.5°C) in September, to a moderately hot 76.5°F (24.7°C). Weather in October »

November, the last month of the autumn, in Rio Vista, is also an enjoyable month, with average temperature fluctuating between 46.4°F (8°C) and 63.9°F (17.7°C). In Rio Vista, California, the average high-temperature drops, from a moderately hot 76.5°F (24.7°C) in October, to a comfortable 63.9°F (17.7°C). Weather in November »

December, the first month of the winter, in Rio Vista, is also a fresh month, with average temperature fluctuating between 41.7°F (5.4°C) and 55°F (12.8°C). With an average high-temperature of 55°F (12.8°C) and an average low-temperature of 41.7°F (5.4°C), December is the coldest month. Weather in December »

What are the most humid months in Rio Vista?

Months with the highest humidity are January and March, with an average relative humidity of 74%.

How much does it rain in Rio Vista?

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

What is the month with the lowest UV index in Rio Vista?

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

What is the rainiest month in Rio Vista?

The month with the most rainfall is February when the rain falls for 8.6 days and typically aggregates up to 2.17" (55mm) of precipitation.

When are the longest days in Rio Vista?

June has the longest days of the year in Rio Vista, California, with an average of 14.8h of daylight.

When is the highest UV index in Rio Vista?

Months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month in Rio Vista?

July is the warmest month, with an average high-temperature of 91°F (32.8°C) and an average low-temperature of 57.2°F (14°C).

What month has the most sunshine in Rio Vista?

The month with the most sunshine is July, with an average of 12.1h of sunshine.

What is the driest month in Rio Vista?

August is the only month when rain does not fall in Rio Vista.

What is the least humid month in Rio Vista?

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

When does it rain in Rio Vista?

Months with rainfall are January through July, September through December.

What is the coldest month in Rio Vista?

December is the coldest month in Rio Vista, with an average high-temperature of 55°F (12.8°C) and an average 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 9.6h of daylight.

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

December has the least sunshine of the year, with an average of 5.9h of sunshine.
Average temperature - Rio Vista, CA
Average humidity - Rio Vista, CA
Average rainfall - Rio Vista, CA
Average rainfall days - Rio Vista, CA
Average daylight / Average sunshine - Rio Vista, CA

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.9h).

Average UV index - Rio Vista, CA