When to go · Sun Valley
Sun Valley in August
Great month. Inside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).
Key facts
- Verdict
- Great
- Temperature
- 29°C (84°F)84°F (29°C) / 9°C (48°F)48°F (9°C)
- average high / low
- Rain days
- 4
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).
Is another month better than August?
No other month rates higher than August for Sun Valley in this guide.
Weather in August
- Sun ValleyHighs around 29 °C (84 °F), lows around 9 °C (48 °F), rain on about 4 daysHighs around 84 °F (29 °C), lows around 48 °F (9 °C), rain on about 4 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Sun Valley, side by side.
Verdict
Aug: Great
Jan: Great
Daytime high
Aug: 29 °C (84 °F)84 °F (29 °C)
Jan: 0 °C (32 °F)32 °F (0 °C)
Night low
Aug: 9 °C (48 °F)48 °F (9 °C)
Jan: -12 °C (10 °F)10 °F (-12 °C)
Rain days
Aug: 4 (better)
Jan: 9
Crowds
Aug: High
Jan: Low
Prices
Aug: High
Jan: Low
Festivals listed
Aug: 0
Jan: 0
August: Inside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).
January: Inside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).
Sun Valley: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings