Monthly weather forecast and climate
Rio Oso, CA

Weather in January

January is a mild winter month in Rio Oso, California, with average temperature varying between 40.6°F (4.8°C) and 56.1°F (13.4°C). In Rio Oso, the average high-temperature is relatively the same as in December - a mild 56.1°F (13.4°C). Weather in January »

Weather in February

The last month of the winter, February, is also a moderate month in Rio Oso, California, with average temperature varying between 41°F (5°C) and 58.3°F (14.6°C). In February, the average high-temperature is essentially the same as in January - a still mild 58.3°F (14.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Rio Oso, California, with temperature in the range of an average high of 62.1°F (16.7°C) and an average low of 43.5°F (6.4°C). In Rio Oso, California, the average high-temperature is relatively the same as in February - an enjoyable 62.1°F (16.7°C). Weather in March »

Weather in April

April in Rio Oso, California, is an agreeable spring month, with average temperature ranging between max 69.4°F (20.8°C) and min 46.9°F (8.3°C). In April, the average high-temperature marginally rises, from an enjoyable 62.1°F (16.7°C) in March, to an agreeable 69.4°F (20.8°C). Weather in April »

Weather in May

May, the last month of the spring, in Rio Oso, is a moderately hot month, with average temperature fluctuating between 77.5°F (25.3°C) and 52.7°F (11.5°C). In May, the average high-temperature marginally rises, from a pleasant 69.4°F (20.8°C) in April, to a warm 77.5°F (25.3°C). Weather in May »

Weather in June

June, the first month of the summer, in Rio Oso, is a tropical month, with average temperature ranging between max 88.7°F (31.5°C) and min 58.8°F (14.9°C). In June, the average high-temperature increases, from a warm 77.5°F (25.3°C) in May, to a hot 88.7°F (31.5°C). Weather in June »

Weather in July

July is a very hot summer month in Rio Oso, California, with average temperature fluctuating between 61.3°F (16.3°C) and 95.4°F (35.2°C). The warmest month is July, with an average high-temperature of 95.4°F (35.2°C) and an average low-temperature of 61.3°F (16.3°C). Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Rio Oso, California, with average temperature fluctuating between 60.8°F (16°C) and 94.6°F (34.8°C). In Rio Oso, the average high-temperature is essentially the same as in July - a tropical 94.6°F (34.8°C). Weather in August »

Weather in September

September, the first month of the autumn, in Rio Oso, is still a hot month, with average temperature ranging between max 88.9°F (31.6°C) and min 59°F (15°C). In September, the average high-temperature marginally drops, from a hot 94.6°F (34.8°C) in August, to a still tropical 88.9°F (31.6°C). Weather in September »

Weather in October

October, the same as September, is another warm autumn month in Rio Oso, California, with average temperature ranging between min 53.1°F (11.7°C) and max 76.1°F (24.5°C). In Rio Oso, the average high-temperature drops, from a hot 88.9°F (31.6°C) in September, to a moderately hot 76.1°F (24.5°C). Weather in October »

Weather in November

November, the last month of the autumn, in Rio Oso, is another comfortable month, with average temperature fluctuating between 45.3°F (7.4°C) and 63°F (17.2°C). In Rio Oso, California, the average high-temperature in November drops, from a warm 76.1°F (24.5°C) in October, to a comfortable 63°F (17.2°C). Weather in November »

Weather in December

The first month of the winter, December, is also a fresh month in Rio Oso, California, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 54.3°F (12.4°C). With an average high-temperature of 54.3°F (12.4°C) and an average low-temperature of 40.6°F (4.8°C), December is the coldest month. Weather in December »
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FAQ

How many days does it rain in Rio Oso?

Throughout the year, in Rio Oso, California, there are 78.2 rainfall days, and 20.43" (519mm) of precipitation is accumulated.

How many days does it snow in Rio Oso?

Throughout the year, in Rio Oso, there are 0.1 snowfall days.

When it does not snow in Rio Oso?

January through November are months without snowfall.

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

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

What is the most humid month in Rio Oso?

The most humid month is March, with an average relative humidity of 75%.

What is the rainiest month in Rio Oso?

March is the month with the most rainfall in Rio Oso. Rain falls for 14.3 days and accumulates 3.9" (99mm) of precipitation.

When are the longest days in Rio Oso?

With an average of 14.9h of daylight, June has the longest days of the year in Rio Oso, California.

What is the month with the highest UV index in Rio Oso?

Months with the highest UV index in Rio Oso, California, are June and July, with an average maximum UV index of 7.

What is the warmest month in Rio Oso?

The warmest month in Rio Oso is July, with an average high-temperature of 95.4°F (35.2°C) and an average low-temperature of 61.3°F (16.3°C).

What is the least humid month in Rio Oso?

The least humid month is July, with an average relative humidity of 39%.

What is the driest month in Rio Oso?

July and August are months with the least rain when the rain falls for 1 days and typically aggregates up to 0.04" (1mm) of rain.

What month has the most sunshine in Rio Oso?

July has the most sunshine of the year in Rio Oso, with an average of 12.1h of sunshine.

What is the coldest month in Rio Oso?

With an average high-temperature of 54.3°F (12.4°C) and an average low-temperature of 40.6°F (4.8°C), December is the coldest month in Rio Oso.

When does it snow in Rio Oso?

The only month with snowfall is December.

When does it snow the most in Rio Oso?

The month with the most snowfall days in Rio Oso is December when snow falls for 0.1 days.

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

December has the shortest days of the year, with an average of 9.5h of daylight.

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

With an average of 5.5h of sunshine, December has the least sunshine of the year in Rio Oso.

Average temperature
Rio Oso, CA

Average temperature - Rio Oso, CA

The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is December (54.3°F).

The month with the highest average low temperature is July (61.3°F).
The coldest months (with the lowest average low temperature) are January and December (40.6°F).

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Average pressure
Rio Oso, CA

Average pressure - Rio Oso, CA

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.9").

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Average wind speed
Rio Oso, CA

Average wind speed - Rio Oso, CA

The windiest months (with the highest average wind speed) are March and May (6.2mph).
The calmest month (with the lowest average wind speed) is November (4.8mph).

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Average rainfall
Rio Oso, CA

Average rainfall - Rio Oso, CA

The wettest month (with the highest rainfall) is March (3.9").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days
Rio Oso, CA

Average rainfall days - Rio Oso, CA

The month with the highest number of rainy days is March (14.3 days).
The month with the least rainy days is July (1 days).

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Average snowfall days
Rio Oso, CA

Average snowfall days - Rio Oso, CA

The month with the highest number of snowfall days is December (0.1 days).
Months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight / Average sunshine
Rio Oso, CA

Average daylight / Average sunshine - Rio Oso, CA

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days
Rio Oso, CA

Average sunshine days - Rio Oso, CA

The month with the most sunshine days is July (30 days).
The month with the least sunshine days is March (16.1 days).

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Average UV index
Rio Oso, CA

Average UV index - Rio Oso, CA

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average visibility
Rio Oso, CA

Average visibility - Rio Oso, 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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