Monthly weather forecast and climate
Sun Valley, CA

Weather in January

January, the same as December, is another enjoyable winter month in Sun Valley, California, with average temperature varying between 63.5°F (17.5°C) and 47.5°F (8.6°C). In January, the average high-temperature is essentially the same as in December - a still comfortable 63.5°F (17.5°C). Weather in January »

Weather in February

February, the last month of the winter, in Sun Valley, is another comfortable month, with average temperature varying between 46.8°F (8.2°C) and 63.3°F (17.4°C). In February, the average high-temperature is practically the same as in January - a still comfortable 63.3°F (17.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Sun Valley, is also an enjoyable month, with average temperature ranging between max 66.6°F (19.2°C) and min 48.6°F (9.2°C). In March, the average high-temperature is essentially the same as in February - a still enjoyable 66.6°F (19.2°C). Weather in March »

Weather in April

April is an agreeable spring month in Sun Valley, California, with temperature in the range of an average high of 70.7°F (21.5°C) and an average low of 50.7°F (10.4°C). In Sun Valley, California, the average high-temperature is relatively the same as in March - an agreeable 70.7°F (21.5°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Sun Valley, California, with average temperature ranging between min 54.3°F (12.4°C) and max 73.8°F (23.2°C). In Sun Valley, the average high-temperature is relatively the same as in April - a warm 73.8°F (23.2°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Sun Valley, California, with average temperature ranging between max 79.5°F (26.4°C) and min 58.3°F (14.6°C). In June, the average high-temperature slightly increases, from a moderately hot 73.8°F (23.2°C) in May, to a still warm 79.5°F (26.4°C). Weather in June »

Weather in July

July, like June, in Sun Valley, California, is another warm summer month, with average temperature ranging between min 63.5°F (17.5°C) and max 84.7°F (29.3°C). In July, the average high-temperature is almost the same as in June - a still moderately hot 84.7°F (29.3°C). Weather in July »

Weather in August

The last month of the summer, August, is a hot month in Sun Valley, California, with temperature in the range of an average low of 64.8°F (18.2°C) and an average high of 86.5°F (30.3°C). The warmest month is August, with an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 64.8°F (18.2°C). In August, the average heat index is calculated to a hot 89.1°F (31.7°C). Weather in August »

Weather in September

September, the first month of the autumn, in Sun Valley, is still a warm month, with average temperature varying between 63.1°F (17.3°C) and 83.3°F (28.5°C). In September, the average high-temperature is almost the same as in August - a warm 83.3°F (28.5°C). Weather in September »

Weather in October

October, the same as September, is a moderately hot autumn month in Sun Valley, California, with average temperature fluctuating between 77°F (25°C) and 58.1°F (14.5°C). In Sun Valley, the average high-temperature in October slightly decreases, from 83.3°F (28.5°C) in September, to a still moderately hot 77°F (25°C). Weather in October »

Weather in November

The last month of the autumn, November, is another pleasant month in Sun Valley, California, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 69.4°F (20.8°C). In November, the average high-temperature slightly decreases, from a warm 77°F (25°C) in October, to an agreeable 69.4°F (20.8°C). Weather in November »

Weather in December

December, the first month of the winter, in Sun Valley, is also an enjoyable month, with temperature in the range of an average low of 46.2°F (7.9°C) and an average high of 61.7°F (16.5°C). The coldest month is December, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46.2°F (7.9°C). Weather in December »
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FAQ

How many days does it rain in Sun Valley?

Throughout the year, in Sun Valley, California, there are 40.1 rainfall days, and 5.87" (149mm) of precipitation is accumulated.

What is the month with the least sunshine in Sun Valley?

Months with the least sunshine in Sun Valley are January, February and December, with an average of 6.9h of sunshine.

What is the most humid month in Sun Valley?

With an average relative humidity of 59%, June is the most humid month.

What is the driest month in Sun Valley?

June is the month with the least rainfall. Rain falls for 1 days and accumulates 0.04" (1mm) of precipitation.

When are the longest days in Sun Valley?

June has the longest days of the year in Sun Valley, with an average of 14.4h of daylight.

What are the months with the most sunshine in Sun Valley?

June through August, with an average of 12.1h of sunshine, are months with the most sunshine in Sun Valley, California.

When is the highest UV index in Sun Valley?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Sun Valley, California.

What is the warmest month in Sun Valley?

With an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 64.8°F (18.2°C), August is the warmest month in Sun Valley.

What is the least humid month in Sun Valley?

The least humid month in Sun Valley, California, is November, with an average relative humidity of 48%.

What is the coldest month in Sun Valley?

The coldest month in Sun Valley, California, is December, with an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 46.2°F (7.9°C).

What is the wettest month in Sun Valley?

The month with the most rainfall is December when the rain falls for 4.6 days and typically aggregates up to 1.18" (30mm) of precipitation.

What is the month with the shortest days in Sun Valley?

December has the shortest days of the year in Sun Valley, with an average of 9.9h of daylight.

When is the lowest UV index in Sun Valley?

The month with the lowest UV index in Sun Valley is December, with an average maximum UV index of 3.

Average temperature
Sun Valley, CA

Average temperature - Sun Valley, CA

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (61.7°F).

The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.2°F).

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Average pressure
Sun Valley, CA

Average pressure - Sun Valley, CA

The month with the highest atmospheric pressure is January (30.11").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed
Sun Valley, CA

Average wind speed - Sun Valley, CA

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).

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Average rainfall
Sun Valley, CA

Average rainfall - Sun Valley, CA

The wettest month (with the highest rainfall) is December (1.18").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days
Sun Valley, CA

Average rainfall days - Sun Valley, CA

The month with the highest number of rainy days is March (5.2 days).
The month with the least rainy days is June (1 days).

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Average daylight / Average sunshine
Sun Valley, CA

Average daylight / Average sunshine - Sun Valley, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

Months with the most sunshine are June, July and August (Average sunshine: 12.1h).
Months with the least sunshine are January, February and December (Average sunshine: 6.9).

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Average sunshine days
Sun Valley, CA

Average sunshine days - Sun Valley, CA

The month with the most sunshine days is October (27.1 days).
The month with the least sunshine days is February (22.9 days).

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Average visibility
Sun Valley, CA

Average visibility - Sun Valley, 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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