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When to go · Sun Valley

Sun Valley, month by month

The best months for Sun Valley: Jan, Feb, Mar, Jul, Aug, Sep. Months to avoid: Apr, May, Nov.

Month by month

  1. JanuaryGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).0 °C / -12 °C, 9 rain daysCrowds: Low
  2. FebruaryGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).3 °C / -10 °C, 8 rain daysCrowds: Low · 1 festival or holiday
  3. MarchGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).8 °C / -6 °C, 8 rain daysCrowds: Medium · 2 festivals or holidays
  4. AprilAvoidListed as a month to avoid: Apr–May and Nov (mud season, lifts and trails closed).13 °C / -2 °C, 7 rain daysCrowds: Medium · 1 festival or holiday
  5. MayAvoidListed as a month to avoid: Apr–May and Nov (mud season, lifts and trails closed).18 °C / 2 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  6. JuneGoodOutside the best window (Jan–Mar (ski), Jul–Sep (hike, bike, fish)). Across United States: Rockies and northern parks open; desert heat builds; hurricane season starts. Book parks months ahead.24 °C / 6 °C, 6 rain daysCrowds: High
  7. JulyGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).29 °C / 9 °C, 4 rain daysCrowds: High · 1 festival or holiday
  8. AugustGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).29 °C / 9 °C, 4 rain daysCrowds: High
  9. SeptemberGreatInside Sun Valley's best window: Jan–Mar (ski), Jul–Sep (hike, bike, fish).23 °C / 4 °C, 5 rain daysCrowds: Medium · 1 festival or holiday
  10. OctoberGoodOutside the best window (Jan–Mar (ski), Jul–Sep (hike, bike, fish)). Across United States: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.15 °C / -1 °C, 6 rain daysCrowds: Medium
  11. NovemberAvoidListed as a month to avoid: Apr–May and Nov (mud season, lifts and trails closed).5 °C / -7 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  12. DecemberMixedOutside the best window (Jan–Mar (ski), Jul–Sep (hike, bike, fish)). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.0 °C / -12 °C, 9 rain daysCrowds: High · 1 festival or holiday