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

August 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
The last month of the summer, August, is another warm month in Sun Valley, Idaho, with average temperature ranging between max 81.7°F (27.6°C) and min 37°F (2.8°C).

Temperature

In August, the average high-temperature is essentially the same as in July - a still warm 81.7°F (27.6°C). The average low-temperature, in Sun Valley, Idaho, is 37°F (2.8°C).

Rainfall

In Sun Valley, during August, the rain falls for 8 days and regularly aggregates up to 0.8" (21.3mm) of precipitation. Throughout the year, in Sun Valley, there are 122 rainfall days, and 17.2" (438.1mm) of precipitation is accumulated.

Snowfall

In Sun Valley, it doesn't snow. In September, it regularly snows. Throughout the year, 121.1" (3075.9mm) of snow is accumulated.

Daylight

In Sun Valley, Idaho, the average length of the day in August is 13.9h.

Sunshine

The average sunshine in Sun Valley is 10h.

UV index

In Sun Valley, the average daily maximum UV index in August is 9. A UV Index reading of 8 to 10 represents a very high threat to health from unsafe exposure to the UV radiation for the average person.
The average daily UV index of 9 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Protect yourself by liberally applying a sunscreen of at least 30 SPF. Sunscreen prevents sunburn and decreases the damaging effects of Sun's radiation on the immune system.

What is the temperature in August in Sun Valley?

In August, in Sun Valley, the average high-temperature is 81.7°F (27.6°C), and the average low-temperature is 37°F (2.8°C).

How much does it rain in Sun Valley in August?

In August, in Sun Valley, the rain falls for 8 days. Throughout August, 0.8" (21.3mm) of precipitation is accumulated.

Does it snow in Sun Valley in August?

In Sun Valley, in August, it doesn't snow. In September, it regularly snows.

How many hours of daylight does Sun Valley have in August?

In Sun Valley, Idaho, the average length of the day in August is 13.9h.

How long on average sun shines in August in Sun Valley?

In Sun Valley, Idaho, the average sunshine in August is 10h.

What is the UV index intensity in August in Sun Valley?

The average daily maximum UV index in August in Sun Valley is 9. A UV Index of 8 to 10 symbolizes a very high health risk from the exposure to the Sun's UV rays.
Average temperature in August - Sun Valley, ID
  • Average high temperature in August: 81.6°F

The warmest month (with the highest average high temperature) is July (82.5°F).
The month with the lowest average high temperature is January (30°F).

  • Average low temperature in August: 37°F

The month with the highest average low temperature is July (38.3°F).
The coldest month (with the lowest average low temperature) is January (0.3°F).

Average rainfall in August - Sun Valley, ID
  • Average rainfall in August: 0.8"

Wettest months (with the highest rainfall) are January and December (2.6").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in August - Sun Valley, ID
  • Average rainfall days in August: 8 days

Months with the highest number of rainy days are January, March and December (13 days).
Months with the lowest number of rainy days are July and October (7 days).

Average snowfall in August - Sun Valley, ID
  • Average snowfall in August: 0"

The month with the highest snowfall is January (36").
Months with the lowest snowfall are June, July and August (0").

Average daylight in August / Average sunshine in August - Sun Valley, ID
  • Average daylight in August: 13.9h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in August: 10h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January, November and December (Average sunshine: 4).

Average UV index in August - Sun Valley, ID
  • Average UV index in August: 9

The month with the highest UV index is July (UV index 10).
The month with the lowest UV index is December (UV index 1).