SeasonMapBig Sky weather in July
United States
July in Big Sky: warm, a little rain, with clean air — one of the weakest months to visit.
#11 of 12 months in Big Sky · #1326 of 1383 destinations to visit in July · comfort 14/100 (tier F)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Big Sky in July
Other months in Big Sky
Big Sky's forum calls February prime powder season — deep base depth, frequent storms, and, outside the Presidents Day weekend crush, thinner crowds than the holidays. Regulars say conditions generally hold up well into March, so it's not a narrow window.
Add your own note from Big Sky's card on the map.
Big Sky climate normals — July
| Daytime high | 26°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 38 mm / 1.5 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 53% | 🍃 comfortable |
| Dew point | 8°C / 46°F | |
| Sunshine | 13.7 h/day | |
| Daylight | 15.2 h | |
| Wind | 13 km/h / 8 mph | |
| Snowfall | 0.2 cm / 0.1 in | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Big Sky in July
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsBig Sky PBR, Summer break in United States, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Big Sky's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherBig Sky's weather peaks December–February.
Best weatherFair weatherToughest weather
What's on in Big Sky in July
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Yellowstone roads open
15 Apr – 5 Nov · usuallyTrail seasonClosuresThe interior roads out of West Yellowstone are ploughed open in stages from mid-April and close again to cars in early November, after which it is snowcoach or nothing. Big Sky is an hour from that gate. Source ↗
- Festival
Music in the Mountains
1 Jun – 10 Sep · usuallyMajor festivalFree Thursday-evening concerts in Town Center park from early June to the start of September. Bring a blanket and something warm; the temperature drops the moment the sun goes behind Lone Peak. Source ↗
- Festival
Big Sky PBR
17–19 JulMajor festivalCrowdedBook earlyThree nights of professional bull riding in the events arena in the middle of July, and the busiest week of the Big Sky summer. Rooms in the valley go months ahead and the concerts run after the last ride. Source ↗
Nearby, and something's on
Within 300 km of Big Sky — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Big Sky?
Big Sky in July — FAQ
- Is July a good time to visit Big Sky?
- July in Big Sky: warm, a little rain, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for Big Sky on SeasonMap's comfort score (14/100).
- What is the weather like in Big Sky in July?
- In July, Big Sky averages a daily high of 25.7°C and a low of 12°C, with about 38.4 mm of rain over roughly 10.2 rainy days.
- What is the air quality in Big Sky in July?
- Big Sky has a mean US Air Quality Index of about 48 in July.
Other months in Big Sky
Compare Big Sky in July
Warmer or cooler than Big Sky in July
Similar destinations in North America — July
Within 300 km: Bozeman's Mountain wildflowers around 20 Jun – 5 Aug, and Yellowstone National Park's Beartooth Highway open around 22 May – 12 Oct.