Park City weather in September

September in Park City: nice, a little rain, with clean air — not the best time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Park City🇺🇸 United States · Rockies · Ski19
  1. 93Jan
  2. 89Feb
  3. 80Mar
  4. 60Apr
  5. 31May
  6. 16Jun
  7. 14Jul
  8. 12Aug
  9. 19Sep
  10. 38Oct
  11. 69Nov
  12. 85Dec

#9 of 12 months in Park City · #1389 of 1413 destinations to visit in September · comfort 19/100 (tier F)

Days
22°C
Nights
8°C
Wet days
7
Sun
11.2 h
Humidity
52%
Daylight
12 h
Park City, United States
Photo: Quang Vuong · Pexels

Traveller notes on Park City in September

Park City-forum threads on a September visit call this genuinely one of the nicer stretches of the year, posters describing the town as pretty quiet after Labor Day outside of weekend day-trippers from the Salt Lake valley. Regulars call mid-to-late September real off season here, some restaurants and shops closed though accommodation rates considerably better as a result. Posters recommend Olympic Park for a bobsled run or zip line, a real option beyond the usual hiking and biking. Regulars call golf a solid September addition, both in Park City itself and nearby Heber City. Posters recommend real layers regardless of a sunny forecast, a passing early storm capable of bringing a brief flurry even this time of year. Regulars call most summer activities still fully in play through September, hiking and biking conditions considered reliable. The record: 21.7C days feeling like 22C, 7.8C nights, an extraordinarily high 54.4mm across nearly 7 days and 45 percent humidity.
ParkCitySeptemberRegular · September · 1 month ago · Read more on Tripadvisor ↗

Other months in Park City

Park City-forum threads on a March visit describe conditions as genuinely a real wildcard, posters naming a range anywhere from sixteen inches of fresh snow to a sunny forty-five degree day within the same month. Regulars call spring break crowds genuinely real but avoidable, several posters naming midweek visits and skipping the busiest chairlifts as standard workarounds. Posters call the weekly Spring Gruv Festival a real bonus, several regulars naming free concerts on the plazas as a fun addition to a March trip. Regulars call layering genuinely tricky to get right, several threads describing skiers in t-shirts with shells off on the slopes but still needing sunscreen and warmer layers for the lifts. Posters recommend checking current conditions rather than assuming typical March patterns hold, several regulars calling this standard given how much the month can swing. The record: 4.9C days, -4.7C nights, an extraordinarily high 123.8mm across nearly 14 days and 75 percent humidity.
ParkCityMarchRegular · March · 1 month ago · Read more on Tripadvisor ↗
Park City-forum threads on December conditions call it genuinely early-season and unpredictable - some Decembers deliver deep, reliable snow, others run lean until later in the month, and posters are candid that year-to-year variation here is real rather than a rare exception. What's dependable regardless: the resorts run extensive snowmaking on the lower runs, so skiing itself is available even in a lighter-snow year, even if natural coverage isn't yet at its deepest. The last week of December consistently gets singled out as more reliable than the first half. Road conditions get a mention too - Utah's plow crews are called efficient enough that only a major storm actually closes roads, so a mid-December trip rarely turns into a logistics problem even if the powder is thinner than a February visit. The record: a frigid 2.3C by day dropping to -7.6C at night, 104mm across 11.3 days, a notably high 58.5cm of fresh snowfall, 78 percent humidity and 6.8 hours of sun.
MainStreetDecemberRegular · December · 1 month ago · Read more on Tripadvisor ↗
Park City-forum threads on January are upfront that snow coverage is a guessing game early in the month - it could snow for several days straight or sit dry for ten - but historically there's plenty of real snow on the mountain by this point, and posters call the skiing colder, snowier and generally excellent compared with March. The bigger variable isn't the snowpack: Sundance Film Festival runs January 19-29 and reshapes the whole month, spiking housing rates even though most Sundance visitors aren't there to ski, and MLK weekend adds its own crowd and price bump on top. The record: 0C days, -9.4C nights, 72cm of snowfall and 115mm of precipitation across 12.5 days, seven hours of sun and an AQI of 36 - properly cold, properly snowy, book around the festival dates either way.
SundanceHousingWatcher · January · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe April as spring-skiing conditions rather than deep winter - daytime highs commonly in the high-40s to low-50sF, overnight temps still around freezing, and snow that softens through the day rather than staying powdery. Posters recommend planning for hard-packed snow first thing in the morning that turns soft by mid-morning and heavier, slushier by afternoon if the previous night dropped below freezing, though a late-season storm can still bring some of the best skiing of the year. Posters note most resorts close around the second weekend of April, with locals specifically prizing the tail end of the season for the chance to ski in the morning and eat lunch at an outdoor cafe in the sun the same day.
Tripadvisor community · April · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Park City's card on the map.

Park City climate normals — September

Daytime high22°C / 71°F😎 nice
Nighttime low8°C / 46°F
Feels like (high)19°C / 66°F
Rainfall54 mm / 2.1 in🌦 some rain
Rainy days7 days
Humidity52%🍃 comfortable
Dew point3°C / 37°F
Sunshine11.2 h/day
Daylight12.4 h
Wind12 km/h / 8 mph
Snowfall1.9 cm / 0.7 in
Air quality (US AQI)39🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Park City in September

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.

Quiettravelers describe it as quiet, Summer break in United States

Sourced from traveler notes: “…Salt Lake valley. Regulars call mid-to-late September real off season here, some restaurants and shops closed though accommodatio…” — ParkCitySeptemberRegular

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Peak crowdsBusyShoulder seasonQuiet

Best months for Park City'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).

Fair weatherPark City's weather peaks December–February, best around January.

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Best weatherFair weatherToughest weather

What's on in Park City in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Wildfire smoke season

    15 Jul – 20 Sep · usually

    Smoke from fires in the Great Basin and California drifts into northern Utah in most late summers, flattening the view of the Wasatch and pushing the air readings up for days at a time. Source ↗

  • Nature

    Aspens turning

    18 Sep – 8 Oct · usuallyAutumn colour

    The stands along Guardsman Pass and the Mid-Mountain trail turn in the last week of September. The pass road is unpaved in places and closes for the winter soon after.

What's on around the world in September →

Nearby, and something's on

Within 300 km of Park City — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Park City?

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Park City in September — FAQ

Is September a good time to visit Park City?
September in Park City: nice, a little rain, with clean air — not the best time to visit. It ranks #9 of 12 months for Park City on SeasonMap's comfort score (19/100).
What is the weather like in Park City in September?
In September, Park City averages a daily high of 21.7°C and a low of 7.8°C, with about 54.4 mm of rain over roughly 6.9 rainy days.
What is the air quality in Park City in September?
Park City has a mean US Air Quality Index of about 39 in September.
Does it snow in Park City in September?
Park City sees roughly 1.9 cm of snowfall in September.

Within 300 km: Arches National Park's Autumn walking window on 15 Sep – 31 Oct, and Moab's Autumn desert season on 20 Sep – 5 Nov.