Utah weather in September
There's a real gradient across Utah in September: 91° afternoons in Zion National Park, 79° in Park City.
Based on 4 weather stations. Four stations split between the Wasatch and the red-rock south — the two Utahs travelers actually visit, which rarely have the same weather on the same day.
Salt Lake Valley
Highs near 81°, nights around 56°, and 1.1 in of rain in a typical September.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Salt Lake City | 81° / 56° | 3 | The canyons turn scarlet before the valley notices anything changed. |
The Wasatch
Highs near 79°, nights around 38°, and 1.3 in of rain in a typical September.
| Place | Highs / lows | Wet days | Snow | The short version |
|---|---|---|---|---|
| Park City | 79° / 38° | 3 | 0.5 in | Aspens go over in a week, mornings turn frosty. |
Red Rock Country
Highs 88–91°, nights 55–61°, and 0.9–1.2 in of rain in a typical September.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Moab | 88° / 55° | 2 | The desert becomes livable again, and everyone comes back. |
| Zion National Park | 91° / 61° | 2 | Summer loosens its grip a notch, and evenings turn pleasant. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.