West Yellowstone weather in August 2025

Expect 23°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in West Yellowstone in August. Check more long-term weather averages for West Yellowstone in August before you book your next holiday to Montana in 2025/2026.

• 23
  23°C max day temperature
• 10
  10 hours of sunshine per day
• 8
  8 days with some rainfall
• 4
  4°C min night temperature
• 14
  14 hours of daylight per day
• 0
  No heat & humidity
• 41
  41 mm of monthly rainfall
• 8
  8 (Very High) UV index

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The August weather guide for Montana (West Yellowstone) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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

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West Yellowstone August sunrise & sunset times

Browse the sunrise and sunset times for West Yellowstone in August 2025. Select a month to view West Yellowstone sunrise and sunset times for the next 12 months.

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