Las Vegas Weather in September
Typical weather, rainfall, and packing tips for Las Vegas in September
United States · September
Las Vegas Weather in September
September weather in Las Vegas averages 34°C with 1 rain days and 25% humidity. Cooling slightly.
Daytime high
37°C
Nighttime low
30°C
Rain days
1 days
UV index
8
Typical Weather in Las Vegas in September
Based on 30-year historical averages.
Temperature
Conditions
What to Expect in September
- 1Daytime highs around 37°C, dropping to 30°C at night.
- 2Expect 1 rain days — rain is occasional.
- 3Humidity sits at 25% — comfortable.
- 410 hours of sunshine per day on average.
- 5UV index of 8 — use SPF 50+.
What to Pack for Las Vegas in September
Best Activities for September Weather
Outdoor sightseeing
Plan outdoor activities for mornings when temperatures are most comfortable.
Indoor attractions
Mix indoor and outdoor experiences for a balanced itinerary.
Food and culture
Autumn seasonal dishes and local festivals make September culturally rich.
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Frequently Asked Questions
How we work this out
Temperature and rainfall figures are 30-year meteorological averages. Crowd levels come from national tourism arrival data. Price bands reflect mid-range accommodation and economy flights from major long-haul cities, sampled quarterly.
Last updated 18 July 2026 · Written by the Holicay travel team