Weather in Summit County, Utah for September 2026
Until now, September 2026 in Summit County is cooler than usual, with temperatures averaging 22.6 °F, this is 2.7 °F below the typical seasonal average.
Expect cooler weather in the next days in Summit County with the forecast suggesting a temperature of 23.2 °F, lower than the historical average.
In general, the average temperature in Summit County at the beginning of September is 25.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 23.3 °F by the end of September.
With an average of 5 rainy days, Summit County experiences minimal rainfall in September.
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Summit County Weather September
Temperatures trend during September in Summit County
September weather in Summit County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 26° /8° | 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 | 8 | |
| Sept. 6 | Sunny | 25° /8° | 5.8 mm | 7 | |
| Sept. 7 |  Partly cloudy | 24° /8° | 0.1 mm | 7 | |
| Sept. 8 | Sunny | 25° /8° | 0 mm | 8 | |
| Sept. 9 | Sunny | 24° /9° | 0 mm | 8.5 | |
| Sept. 10 | Sunny | 24° /9° | 0 mm | 8.1 | |
| Sept. 11 | Sunny | 24° /11° | 0.2 mm | 6.9 | |
| Sept. 12 | Sunny | 27° /11° | 0 mm | 7.9 | |
| Sept. 13 | Sunny | 16° /4° | 0 mm | 5 | |
| Sept. 14 |  Overcast | 23° /3° | 0 mm | 6 | |
| Sept. 15 | Sunny | 25° /9° | 0 mm | 6 | |
| Sept. 16 | Sunny | 25° /10° | 0 mm | 7 | |
| Sept. 17 | Sunny | 27° /12° | 4.8 mm | 7 | |
| Sept. 18 | Light rain shower | 23° /12° | 3.5 mm | 5 | |
| Sept. 19 | Patchy rain possible | 21° /12° | 10.4 mm | 5 | |
| Sept. 20 | Sunny | 20° /8° | 0.1 mm | 6 | |
| Sept. 21 | Sunny | 22° /6° | 0 mm | 6 | |
| Sept. 22 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 23 |  Cloudy | 20° /3° | 0 mm | 5 | |
| Sept. 24 | Sunny | 23° /3° | 0 mm | 6 | |
| Sept. 25 | Sunny | 26° /5° | 0 mm | 7 | |
| Sept. 26 | Sunny | 23° /7° | 2.4 mm | 6 | |
| Sept. 27 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 28 | Sunny | 24° /7° | 0 mm | 6 | |
| Sept. 29 | Sunny | 23° /7° | 0 mm | 6 | |
| Sept. 30 | Sunny | 20° /7° | 0 mm | 5 | |
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Summit County in September - FAQ
What are the expected maximum and minimum temperatures in Summit County during September?
How much rainfall should be expected in Summit County during September?
What are the typical wind conditions in Summit County during September?
September rainfall patterns in Summit County
UV exposure in Summit County during September
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Where is Summit County?Get accurate weather forecasts for Summit County, located at latitude 40.646 and longitude -111.498. Stay updated with localized weather information tailored for Summit County.