Early autumn · Weather & things to do
Las Vegas in September
Las Vegas cools off: highs slip to 97°F (36°C), from 104°F in August, with lows of 70°F (21°C) and about 0.4 in (9 mm) of rain.
Our comfort score puts it mid-table at 64/100, 9th of 12.
- Avg high
- 97°F (36°C)
- Avg low
- 70°F (21°C)
- Rain
- 0.4 in (9 mm)
- Humidity
- 23%
- Cloud cover
- 24%
- Daylight
- ~12 h 13 min
- Comfort score
- 64/100 · Good
What September feels like
Heat sets the pace, with highs around 97°F (36°C). Get out early and keep the hottest hours for somewhere cool.
Mornings start much cooler: lows average 70°F (21°C), about 15°C (27°F) below the afternoon high.
Low humidity, around 23%, makes the air feel crisp and dry.
Rain is scarce: about 0.4 in (9 mm) for the whole month.
Clear skies are common, with cloud cover averaging only 24%.
Plan around September
September sits mid-table; the best months are February – April and October & November.
- Comfort improves from 59/100 in August to 64/100.
- Our Las Vegas & National Parks route recommends Mar – May, so September falls outside its suggested window.
What to pack for September
- Light, breathable clotheshighs average 97°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Refillable water bottleeasy to dehydrate in the heat
- A warm layer for eveningsnights drop to 70°F
- Lip balm and moisturizerdry air
- Comfortable walking shoesmost picks involve some walking
What to do in Las Vegas in September
Start early and take shelter at midday: the picks below pair morning outings with places to cool off.
Hoover Dam
1930s concrete giant on the Colorado River; walk the top and the bypass bridge for the full view.
Why now September scores 64/100 for comfort, good conditions for being outside.
Lotus of Siam
Famous northern Thai restaurant with a deep German Riesling list.
Why now A break from 97°F afternoons.
The Neon Museum
Boneyard of retired casino signs with guided tours on the history of Las Vegas.
Why now Somewhere to sit out the hottest hours.
Herbs & Rye
Off-Strip cocktail bar with a history-organized drinks menu and half-price steaks at happy hour.
Red Rock Canyon National Conservation Area
13-mile scenic drive past red sandstone cliffs, with short hikes like Calico Tanks.
Why now Highs near 97°F and 0.4 in of monthly rain make this an easy outdoor pick.
Nearby in September
- Red Rock Canyon in September~16 mi · highs 89°F, 0.4 in rain · 5°C (8°F) cooler by day, about as wet
- Zion in September~141 mi · highs 79°F, 1.0 in rain · 10°C (18°F) cooler by day, wetter
- Joshua Tree in September~164 mi · highs 94°F, 0.2 in rain · 2°C (3°F) cooler by day, about as wet
- Grand Canyon in September~169 mi · highs 90°F, 1.1 in rain · 4°C (7°F) cooler by day, wetter
These averages also cover The Strip.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Las Vegas in September: quick answers
Is September a good time to visit Las Vegas?
It's middling, scoring 64/100. The best months are February – April and October & November, at up to 97. Expect highs of 97°F (36°C) and 0.4 in (9 mm) of rain. Our Las Vegas & National Parks route recommends Mar – May, so September is outside its suggested window.
How hot is Las Vegas in September?
Average highs are 97°F (36°C) and average lows 70°F (21°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Las Vegas in September?
Not much: about 0.4 in (9 mm) of rain falls across September on average, the 4th-driest month of the year. The annual total is about 5.8 in (147 mm).
What should I pack for Las Vegas in September?
Bring light, breathable clothes (highs average 97°F), sunscreen, sunglasses and a hat (high UV on clear days), refillable water bottle (easy to dehydrate in the heat), a warm layer for evenings (nights drop to 70°F) and lip balm and moisturizer (dry air).
More on Las Vegas
Planning Las Vegas in September?
Share this September plan with your group, poll everyone on dates and keep the packing list in one place.