Summit County (Park City)
September
Weather in Summit County, Utah for September 2027
Your guide to Summit County weather in September - trends and predictions
In general, the average temperature in Summit County at the beginning of September is 25 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 22 °C by the end of September.
Summit County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 36.7 mm.
Is September a good time to visit Summit County? check out the best time to travel to Summit County page.
✨ Is September a good time to visit Summit County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
22°/7°
Temperatures
18 km/h
Avg max wind
44 %
Avg humidity
Summit County Weather September
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Temperatures trend during September in Summit County
See the weather trend as well as the moving average line
September weather in Summit County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 25° /9° | 0.2 mm | 7 | |
| Sept. 2 |  Patchy rain possible | 26° /10° | 0.2 mm | 8 | |
| Sept. 3 |  Thundery outbreaks possible | 26° /9° | 0.5 mm | 7 | |
| Sept. 4 | Patchy rain possible | 25° /9° | 0 mm | 7 | |
| Sept. 5 | Sunny | 25° /7° | 0 mm | 7.8 | |
| Sept. 6 |  Light rain | 24° /9° | 5.8 mm | 7 | |
| Sept. 7 |  Partly cloudy | 24° /8° | 0.1 mm | 7 | |
| Sept. 8 | Sunny | 25° /9° | 0 mm | 7.6 | |
| Sept. 9 | Patchy rain possible | 24° /8° | 0 mm | 7 | |
| Sept. 10 | Patchy light drizzle | 25° /7° | 0.4 mm | 7 | |
| Sept. 11 | Sunny | 24° /9° | 0.5 mm | 7 | |
| Sept. 12 |  Patchy light snow with thunder | 20° /5° | 0.9 mm | 5 | |
| Sept. 13 | Sunny | 20° /5° | 0.5 mm | 6 | |
| Sept. 14 | Sunny | 21° /5° | 0 mm | 7 | |
| Sept. 15 | Patchy light drizzle | 22° /6° | 0.9 mm | 5 | |
| Sept. 16 | Patchy light drizzle | 21° /8° | 2 mm | 4 | |
| Sept. 17 |  Patchy light rain with thunder | 17° /7° | 2.5 mm | 3 | |
| Sept. 18 | Thundery outbreaks possible | 19° /5° | 5.1 mm | 4 | |
| Sept. 19 | Patchy rain possible | 19° /5° | 2.3 mm | 5 | |
| Sept. 20 | Partly cloudy | 20° /5° | 0 mm | 6 | |
| Sept. 21 | Patchy rain possible | 20° /5° | 1.6 mm | 3 | |
| Sept. 22 | Light rain | 18° /6° | 6.4 mm | 4 | |
| Sept. 23 | Sunny | 20° /4° | 0 mm | 6 | |
| Sept. 24 | Sunny | 23° /4° | 0 mm | 6 | |
| Sept. 25 | Sunny | 24° /6° | 0 mm | 6 | |
| Sept. 26 | Patchy rain possible | 22° /8° | 1.6 mm | 5.9 | |
| Sept. 27 | Sunny | 23° /8° | 0.1 mm | 4 | |
| Sept. 28 | Light rain | 21° /7° | 5.1 mm | 4 | |
| Sept. 29 | Sunny | 21° /7° | 0 mm | 5.6 | |
| Sept. 30 | Sunny | 20° /7° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Summit County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Summit County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Summit County in September - FAQ
What are the expected maximum and minimum temperatures in Summit County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 7°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Summit County during September?
In September, Summit County can expect light to moderate rainfall, totaling 36.7 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Summit County during September?
The average wind speed in Summit County during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Summit County
Explore the daily rainfall trends and prepare for Summit Countys September weather 💧
Typically, Summit County has 6 rainy days in September with a total of 36.7 mm of rainfall.
UV exposure in Summit County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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