August weather forecastSun Valley, ID
August
Weather in August
Sun Valley's August weather continues in the balmy trend from July, making it another distinctly summer month. Temperatures hover around the same range with highs coming down slightly to 73.2°F (22.9°C). The sunny, less humid conditions persistence is in contrast to the dampness that characterized the spring months. While August signals summer's ending, there are plenty of opportunities to relish outdoor pursuits under the bright, Idaho sky. Without doubt, a Sun Valley visit in August completes one's experience of its bright, sunny climate.Temperature
Entering August in Sun Valley, the average high-temperature is recorded at a pleasant 73.2°F (22.9°C), exhibiting a minimal shift from July's 74.1°F (23.4°C). With a significant temperature contrast, nighttime temperatures hover around an average low of 50.5°F (10.3°C) in August.Humidity
With an average relative humidity of 37%, August is the least humid month.Rainfall
In Sun Valley, in August, it is raining for 6.5 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, in Sun Valley, there are 107.7 rainfall days, and 15.63" (397mm) of precipitation is accumulated.Snowfall
July and August are months without snowfall.Daylight
In August, the average length of the day is 13h and 56min.On the first day of the month, sunrise is at 6:27 am and sunset at 9:00 pm. On the last day of August, sunrise is at 7:00 am and sunset at 8:14 pm MDT.
Sunshine
In August, the average sunshine in Sun Valley is 11.8h.UV index
In Sun Valley, the average daily maximum UV index in August is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 4 in August translates into the following instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sun Valley, ID
- Average high temperature in August: 73.2°F
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).
- Average low temperature in August: 50.5°F
The months with the highest average low temperature are July and August (50.5°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in August
Sun Valley, ID
- Average pressure in August: 29.92"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in August
Sun Valley, ID
- Average wind speed in August: 5.9mph
The windiest month (with the highest average wind speed) is July (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.5mph).
Average humidity in August
Sun Valley, ID
- Average humidity in August: 37%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (37%).
Average rainfall in August
Sun Valley, ID
- Average rainfall in August: 0.51"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in August
Sun Valley, ID
- Average rainfall days in August: 6.5 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in August
Sun Valley, ID
- Average snowfall in August: 0"
The month with the highest snowfall is February (15").
The months with the least snowfall are July and August (0").
Average snowfall days in August
Sun Valley, ID
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is March (16 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in August /
Average sunshine in August
Sun Valley, ID
- Average daylight in August: 13h and 54min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in August: 11h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in August
Sun Valley, ID
- Average sunshine days in August: 20.6 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is April (11.1 days).
Average UV index in August
Sun Valley, ID
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in August
Sun Valley, ID
- Average cloud cover in August: 11
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in August
Sun Valley, ID
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
