West Yellowstone weather in August
Temperature, rain and sunshine in August: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in August
Excellent
Best time to visit: June – September
What is the weather like in West Yellowstone in August?
In August, West Yellowstone is warm: daytime highs average 24 °C, and nights cool down to about 10 °C. With around 9 hours of sunshine a day, there is plenty of sun. Rain falls on about 6 days, adding up to 27 mm. All in all, August is an excellent month for a holiday in West Yellowstone.
August compared
How the weather changes from July to September. Tap a month to open it.
| JulyJul | AugustAug | SeptemberSep | |
|---|---|---|---|
| Score | 99 | 97 | 90 |
| Day | 26° | 24° | 18° |
| Night | 10° | 10° | 5° |
| Sun | 11 h | 9 h | 8 h |
| Rain days | 5 | 6 | 7 |
More details for August
- Daylight
- 14 h 7 min06:26 – 20:33
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 16 km/haverage daily peakAll months
- Cloud cover
- 34 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−6America/Denver
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %89 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in August
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
West Yellowstone in August: quick answers
Is West Yellowstone hot in August?
Warm rather than hot: in August, daytime highs in West Yellowstone average 24 °C and nights cool to about 10 °C.
Does it rain much in West Yellowstone in August?
Rain falls on about 6 days, adding up to 27 mm.
West Yellowstone month by month
The whole year in West YellowstoneAll destinations: USAWhere to go in August
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences