Sun Valley
Idaho, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Sun Valley, ID

The iconic Sun Valley, Idaho, in a stunning hilly landscape on either side located within the famous White Cloud Wilderness, white clouds above
The iconic Sun Valley, Idaho, in a stunning hilly landscape on either side located within the famous White Cloud Wilderness, white clouds above
January, the same as December, in Sun Valley, Idaho, is a freezing cold winter month, with average temperature ranging between min 32°F (0°C) and max 26.8°F (-2.9°C). In Sun Valley, the average high-temperature in January is essentially the same as in December - a still subzero cold 26.8°F (-2.9°C). Weather in January »

February, the last month of the winter, in Sun Valley, is another freezing cold month, with temperature in the range of an average low of 32°F (0°C) and an average high of 27°F (-2.8°C). In Sun Valley, Idaho, the average high-temperature is relatively the same as in January - a still subzero cold 27°F (-2.8°C). Weather in February »

March, the first month of the spring, in Sun Valley, is a wintry month, with temperature in the range of an average low of 32°F (0°C) and an average high of 32.2°F (0.1°C). In Sun Valley, the average high-temperature in March is practically the same as in February - a wintry 32.2°F (0.1°C). Weather in March »

April, the same as March, is another cold spring month in Sun Valley, Idaho, with average temperature fluctuating between 39.9°F (4.4°C) and 32°F (0°C). In Sun Valley, the average high-temperature marginally rises, from a cold 32.2°F (0.1°C) in March, to a still wintry 39.9°F (4.4°C). Weather in April »

May, the last month of the spring, in Sun Valley, is a fresh month, with average temperature fluctuating between 51.4°F (10.8°C) and 32°F (0°C). In May, the average high-temperature rises, from a cold 39.9°F (4.4°C) in April, to a fresh 51.4°F (10.8°C). Weather in May »

June, the first month of the summer, in Sun Valley, is an enjoyable month, with temperature in the range of an average low of 32°F (0°C) and an average high of 62.4°F (16.9°C). In Sun Valley, the average high-temperature in June increases, from a cool 51.4°F (10.8°C) in May, to an enjoyable 62.4°F (16.9°C). Weather in June »

July in Sun Valley, Idaho, is a moderately hot summer month, with average temperature varying between 32°F (0°C) and 74.1°F (23.4°C). With an average high-temperature of 74.1°F (23.4°C) and an average low-temperature of 32°F (0°C), July is the warmest month. Weather in July »

The last month of the summer, August, is also an agreeable month in Sun Valley, Idaho, with average temperature fluctuating between 32°F (0°C) and 73.2°F (22.9°C). In August, the average high-temperature is relatively the same as in July - an agreeable 73.2°F (22.9°C). Weather in August »

September, the first month of the autumn, in Sun Valley, is still a comfortable month, with average temperature ranging between max 63.7°F (17.6°C) and min 32°F (0°C). In Sun Valley, the average high-temperature decreases, from a pleasant 73.2°F (22.9°C) in August, to a comfortable 63.7°F (17.6°C). Weather in September »

October, the same as September, in Sun Valley, Idaho, is a frosty autumn month, with temperature in the range of an average low of 32°F (0°C) and an average high of 48°F (8.9°C). In October, the average high-temperature significantly decreases, from a comfortable 63.7°F (17.6°C) in September, to a chilly 48°F (8.9°C). Weather in October »

November, the last month of the autumn, in Sun Valley, is another cold month, with average temperature fluctuating between 34.7°F (1.5°C) and 32°F (0°C). In November, the average high-temperature drops, from a chilly 48°F (8.9°C) in October, to a cold 34.7°F (1.5°C). Weather in November »

The first month of the winter, December, is still a freezing cold month in Sun Valley, Idaho, with average temperature ranging between max 25°F (-3.9°C) and min 32°F (0°C). December is the coldest month, with an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 32°F (0°C). Weather in December »

How many days does it rain in Sun Valley?

Throughout the year, in Sun Valley, Idaho, there are 107.7 rainfall days, and 15.63" (397mm) of precipitation is accumulated.

When does it snow in Sun Valley?

January through June, September through December are months with snowfall in Sun Valley.

How many days does it snow in Sun Valley?

In Sun Valley, during the entire year, snow falls for 88.2 days, and aggregates up to 69.45" (1764mm) of snow.

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

January has the least sunshine of the year, with an average of 5.7h of sunshine.

What is the most humid month in Sun Valley?

With an average relative humidity of 87%, February is the most humid month in Sun Valley.

When does it snow the most in Sun Valley?

The month with the most snowfall is February when snow falls for 15.5 days and typically aggregates up to 15" (381mm) of snow.

What is the month with the lowest UV index in Sun Valley?

With an average maximum UV index of 1, February is the month with the lowest UV index in Sun Valley.

What is the rainiest month in Sun Valley?

The month with the most rainfall in Sun Valley, Idaho, is March when the rain falls for 11.4 days and typically aggregates up to 2.01" (51mm) of precipitation.

When are the longest days in Sun Valley?

The month with the longest days in Sun Valley is June, with an average of 15.4h of daylight.

What is the month with the highest UV index in Sun Valley?

June and July, with an average maximum UV index of 5, are months with the highest UV index.

What is the warmest month in Sun Valley?

July is the warmest month in Sun Valley, Idaho, with an average high-temperature of 74.1°F (23.4°C) and an average low-temperature of 32°F (0°C).

What is the driest month in Sun Valley?

The month with the least rainfall is July when the rain falls for 5.9 days and typically collects 0.43" (11mm) of precipitation.

When it does not snow in Sun Valley?

July and August are months without snowfall in Sun Valley, Idaho.

What month has the most sunshine in Sun Valley?

July has the most sunshine of the year, with an average of 12h of sunshine.

What is the least humid month in Sun Valley?

The least humid month in Sun Valley, Idaho, is August, with an average relative humidity of 37%.

What is the coldest month in Sun Valley?

The coldest month in Sun Valley is December, with an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 32°F (0°C).

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

The month with the shortest days in Sun Valley is December, with an average of 9h of daylight.
Average temperature - Sun Valley, ID

The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is December (25°F).

Months with the highest average low temperature are January, February, March, April, May, June, July, August, September, October, November and December (0°F).
Coldest months (with the lowest average low temperature) are January, February, March, April, May, June, July, August, September, October, November and December (0°F).

Average rainfall - Sun Valley, ID
Average rainfall days - Sun Valley, ID

The month with the highest number of rainy days is May (14.8 days).
The month with the lowest number of rainy days is July (5.9 days).

Average snowfall - Sun Valley, ID
Average snowfall days - Sun Valley, ID

The month with the highest number of snowfall days is March (16 days).
Months with the lowest number of snowfall days are July and August (0 days).

Average daylight / Average sunshine - Sun Valley, ID