Weather in Grand County, Utah for September 2026
Until now, September 2026 in Grand County has been nearly identical to the historical average, with a temperature of 29.1 °F (showing only a slight deviation of 0.4 °F).
The forecast for the upcoming days in Grand County predicts a temperature of 23.8 °F, which is slightly above the historical average.
In general, the average temperature in Grand County at the beginning of September is 31 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.7 °F by the end of September.
Precipitation in Grand County during September is a rare event, with an average of fewer than 2 rainy days.
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Grand County Weather September
Temperatures trend during September in Grand County
September weather in Grand County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /15° | 0 mm | 9 | |
| Sept. 2 |  Cloudy | 32° /17° | 0 mm | 8 | |
| Sept. 3 | Sunny | 32° /16° | 0 mm | 8 | |
| Sept. 4 | Sunny | 32° /17° | 0 mm | 9 | |
| Sept. 5 | Sunny | 30° /17° | 0 mm | 8 | |
| Sept. 6 | Sunny | 29° /16° | 0.1 mm | 6 | |
| Sept. 7 | Sunny | 31° /16° | 0 mm | 7 | |
| Sept. 8 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 9 |  Partly cloudy | 31° /16° | 0 mm | 8 | |
| Sept. 10 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 11 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 12 | Sunny | 29° /16° | 1.1 mm | 5 | |
| Sept. 13 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 14 | Sunny | 29° /14° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 30° /16° | 0 mm | 7 | |
| Sept. 16 |  Patchy rain possible | 28° /16° | 1.7 mm | 5 | |
| Sept. 17 |  Overcast | 24° /15° | 2.4 mm | 5 | |
| Sept. 18 | Cloudy | 25° /12° | 0.7 mm | 5 | |
| Sept. 19 | Overcast | 27° /12° | 0 mm | 7 | |
| Sept. 20 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 21 | Cloudy | 26° /13° | 0.1 mm | 5 | |
| Sept. 22 | Sunny | 26° /13° | 0.3 mm | 6 | |
| Sept. 23 | Partly cloudy | 24° /12° | 0 mm | 5 | |
| Sept. 24 | Partly cloudy | 26° /12° | 0 mm | 5 | |
| Sept. 25 | Sunny | 28° /12° | 0 mm | 6 | |
| Sept. 26 | Partly cloudy | 26° /17° | 0 mm | 6.8 | |
| Sept. 27 | Overcast | 27° /18° | 0 mm | 6.4 | |
| Sept. 28 | Patchy rain possible | 20° /15° | 2.7 mm | 3.1 | |
| Sept. 29 | Light rain shower | 16° /12° | 10.9 mm | 2.9 | |
| Sept. 30 | Sunny | 23° /13° | 0.5 mm | 6.4 | |
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Grand County in September - FAQ
What are the expected maximum and minimum temperatures in Grand County during September?
How much rainfall should be expected in Grand County during September?
What are the typical wind conditions in Grand County during September?
September rainfall patterns in Grand County
UV exposure in Grand County during September
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Where is Grand County?Get accurate weather forecasts for Grand County, located at latitude 38.573 and longitude -109.55. Stay updated with localized weather information tailored for Grand County.