Grand County (Moab)
September
Weather in Grand County, Utah for September 2025
Your guide to Grand County weather in September - trends and predictions
In general, the average temperature in Grand County at the beginning of September is 30.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 29.7 °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.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
29
Dry days
1
Rainy days
0
Snow days
29°/16°
Temperatures
20 km/h
Avg max wind
28 %
Avg humidity
Grand County Weather September
Move between months or click on a day
Temperatures trend during September in Grand County
See the weather trend as well as the moving average line
September weather in Grand County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 32° /19° | 0 mm | 8 | |
| Sept. 2 |  Cloudy | 31° /20° | 0 mm | 7 | |
| Sept. 3 |  Sunny | 32° /20° | 0 mm | 8 | |
| Sept. 4 | Sunny | 31° /22° | 0 mm | 8 | |
| Sept. 5 | Sunny | 29° /18° | 0 mm | 7 | |
| Sept. 6 | Sunny | 29° /19° | 0 mm | 7 | |
| Sept. 7 | Sunny | 31° /18° | 0 mm | 8 | |
| Sept. 8 | Sunny | 32° /19° | 0 mm | 8 | |
| Sept. 9 | Partly cloudy | 31° /19° | 0 mm | 8 | |
| Sept. 10 | Sunny | 30° /18° | 0 mm | 8 | |
| Sept. 11 | Sunny | 31° /20° | 0 mm | 8 | |
| Sept. 12 | Sunny | 28° /19° | 0 mm | 7 | |
| Sept. 13 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 14 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 15 | Cloudy | 30° /18° | 0 mm | 7 | |
| Sept. 16 |  Patchy rain possible | 27° /19° | 0.3 mm | 6 | |
| Sept. 17 |  Overcast | 23° /15° | 0 mm | 5 | |
| Sept. 18 | Cloudy | 24° /9° | 0 mm | 5 | |
| Sept. 19 | Sunny | 26° /11° | 0 mm | 7 | |
| Sept. 20 | Sunny | 28° /14° | 0 mm | 7 | |
| Sept. 21 | Cloudy | 23° /13° | 0.2 mm | 5 | |
| Sept. 22 | Sunny | 22° /11° | 0 mm | 6 | |
| Sept. 23 | Partly cloudy | 25° /11° | 0 mm | 7 | |
| Sept. 24 | Partly cloudy | 27° /14° | 0 mm | 7 | |
| Sept. 25 | Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 26 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 27 | Sunny | 30° /14° | 0 mm | 8 | |
| Sept. 28 | Sunny | 31° /15° | 0 mm | 8 | |
| Sept. 29 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 30 | Sunny | 30° /15° | 0 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for Grand 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 Grand County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Grand County in September - FAQ
What are the expected maximum and minimum temperatures in Grand County during September?
During September, expect a variety of temperatures with highs around 29° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Grand County during September?
Rainfall in Grand County during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Grand County during September?
The average wind speed in Grand County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Grand County
Explore the daily rainfall trends and prepare for Grand Countys September weather 💧
UV exposure in Grand County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Grand County
Select a location for an accurate weather forecast
More Locations Quick links
More Grand County weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.