Best time to visit Sun Valley

Find the best time to visit Sun Valley and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Sun Valley by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Idaho

Auto Europe: Cheap car hire deals worldwide

  • Compare car hire prices to find lowest rate
  • Free cancellation up to 48 hours before pick up
  • Book car hire for over 20,000 destinations worldwide
Go to Auto Europe deal >>

View all Auto Europe offers

When is the best time to visit Sun Valley?

The best time to visit Sun Valley is July and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

Change criteria

Max Day Temperature (°C)

  • -2°C maximum daytime temperature in January in Sun Valley-2
    Jan
  • 1°C maximum daytime temperature in February in Sun Valley1
    Feb
  • 4°C maximum daytime temperature in March in Sun Valley4
    Mar
  • 10°C maximum daytime temperature in April in Sun Valley10
    Apr
  • 16°C maximum daytime temperature in May in Sun Valley16
    May
  • 20°C maximum daytime temperature in June in Sun Valley20
    Jun
  • 26°C maximum daytime temperature in July in Sun Valley26
    Jul
  • 25°C maximum daytime temperature in August in Sun Valley25
    Aug
  • 20°C maximum daytime temperature in September in Sun Valley20
    Sep
  • 13°C maximum daytime temperature in October in Sun Valley13
    Oct
  • 4°C maximum daytime temperature in November in Sun Valley4
    Nov
  • -1°C maximum daytime temperature in December in Sun Valley-1
    Dec

Hours of Sunshine (daily)

Which is the hottest month in Sun Valley?

The hottest time of year in Sun Valley is normally July. Expect maximum daytime temperatures to reach 26°C with no heat and humidity.

Which month has the most rain in Sun Valley?

In terms of rainfall, January is usually the wettest month in Sun Valley with 67mm on average. There are normally 13 days in January with some rain.

When is it sunniest in Sun Valley?

The sunniest time of year in Sun Valley is normally July with bright sunshine on average for 78% of daylight hours; that's 12 hours of sunshine per day.

Best time to visit

The weather guide for Idaho (Sun Valley) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Idaho travel features

Do you want to learn more about Idaho? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Idaho.

We don't currently have any travel features on Idaho. Discover more about holiday destinations around the world with this selection of general travel articles.

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Back to Holiday Weather Top ^