Early autumn · Weather & things to do
Arches in September
The year's rain peaks now, with about 1.3 in (34 mm) falling in Arches, alongside highs near 83°F (29°C) and lows of 57°F (14°C).
September opens the best stretch on our comfort score, at 93/100 (4th of 12).
- Avg high
- 83°F (29°C)
- Avg low
- 57°F (14°C)
- Rain
- 1.3 in (34 mm)
- Humidity
- 37%
- Cloud cover
- 32%
- Daylight
- ~12 h 14 min
- Comfort score
- 93/100 · Great
What September feels like
Highs settle around 83°F (29°C), warm enough for short sleeves most of the day.
There's a big swing between day and night, about 15°C (26°F), so mornings and evenings feel much cooler than the afternoon.
Low humidity, around 37%, makes the air feel crisp and dry.
Rain is moderate at about 1.3 in (34 mm) for the month.
Clear skies are common, with cloud cover averaging only 32%.
Plan around September
September is one of Arches's best months on the climate data.
- Last warm month for a while: October highs fall to 68°F.
- Inside the wettest three-month stretch, July – September.
- Opens the best-scoring stretch on our comfort score: April & May and September & October.
- Comfort improves from 70/100 in August to 93/100.
- Our Utah Mighty Five route recommends Mar – May, so September falls outside its suggested window.
What to pack for September
- Light, breathable clothes83°F afternoons
- Sunscreen, sunglasses and a hatstrong sun this month
- A warm layer for eveningslows near 57°F
- Lip balm and moisturizerdry air
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Arches in September
September is good outdoor weather here, so these picks lean toward the open air.
Fiery Furnace
Maze of sandstone fins explored on a ranger-led hike or with a self-guided permit.
Why now Our curated notes say it's best spring or fall.
Arches Visitor Center
Park entrance with exhibits and ranger trail updates.
Why now September scores 93/100 for comfort, good conditions for being outside.
Balanced Rock
A 128-ft rock pinnacle with a big boulder on top, with a short loop trail around it.
Why now Highs near 83°F and 1.3 in of monthly rain make this an easy outdoor pick.
Delicate Arch Trail
Three-mile round trip over slickrock to Utah's most famous arch.
Why now One to do outside while the weather is on your side.
Park Avenue Trail
Short walk between tall fins that look like a city skyline.
Nearby in September
- Canyonlands in September~32 mi · highs 82°F, 1.1 in rain · similar daytime temperatures, about as wet
- Capitol Reef in September~95 mi · highs 80°F, 1.1 in rain · 2°C (3°F) cooler by day, about as wet
- Aspen in September~152 mi · highs 69°F, 1.8 in rain · 8°C (15°F) cooler by day, about as wet
- Bryce Canyon in September~161 mi · highs 71°F, 1.0 in rain · 7°C (12°F) cooler by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~1,819 m to Arches's ~1,428 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Arches in September: quick answers
Is September a good time to visit Arches?
Yes. On the climate data it's one of the best months, scoring 93/100. Expect highs of 83°F (29°C) and 1.3 in (34 mm) of rain. Our Utah Mighty Five route recommends Mar – May, so September is outside its suggested window.
How hot is Arches in September?
Average highs are 83°F (29°C) and average lows 57°F (14°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Arches in September?
Not much: about 1.3 in (34 mm) of rain falls across September on average, the wettest month of the year. The annual total is about 11.9 in (302 mm).
What should I pack for Arches in September?
Bring light, breathable clothes (83°F afternoons), sunscreen, sunglasses and a hat (strong sun this month), a warm layer for evenings (lows near 57°F), lip balm and moisturizer (dry air) and comfortable walking shoes (most places below are best reached on foot or with short walks).
Planning Arches in September?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.