What September feels like in Salt Lake City
For Salt Lake City, September is early autumn on the calendar. Days are warm enough for short sleeves, and time outdoors is easy. The day–night swing is wide (about 13.7°C (24.7°F)): nights are cool, so mornings and evenings feel very different from midday. Moderate humidity keeps the air pleasant.
Rain in Salt Lake City in September
Most days stay dry; rain arrives about one day in 8. A rainy day brings about 8.4 mm (0.3 in) on average — steady rain rather than a passing shower. That is heavier than Salt Lake City's usual 6 mm per rainy day across the year.
Daylight and sunshine in September
In mid-September, sunrise is at about 7:07 am and sunset at about 7:39 pm (local time) — 12 h 32 min of daylight. Evenings are drawing in — 1 h 19 min less daylight than mid-August. Measured sunshine covers about 93% of the daylight — skies are mostly clear.
How September compares to the rest of the year
In Salt Lake City's temperature order, September sits as the 4th warmest month. Against August, the average high is 5.4°C (9.7°F) lower, with 15 mm more rain. The cooling trend carries on into October. October averages a high of 17.3°C (63.1°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Hiking: a good fit — mild temperatures for trails.
Tips for visiting Salt Lake City in September
Versatile Layers
Days are noticeably warmer than nights — layers you can add or remove.
Sunglasses
Plenty of sun, so bring sunglasses and a cap.
Quick questions
How warm is Salt Lake City in September?
Afternoons average 26.5°C (79.7°F) and nights about 12.8°C (55°F) — warm by most people's standards. It is the 4th warmest month of the year.
Does it rain a lot in Salt Lake City in September?
Not especially. There are about 4 rainy days (34 mm), mostly moderate rain.
What should I wear in Salt Lake City in September?
The numbers point to versatile layers and sunglasses. Add a layer for after dark.
Is September or October better for visiting Salt Lake City?
September scores better on our climate ranking (#1 of 12 vs #5), rated Great against Good. October is cooler and has more rainy days.