Las Vegas, Nevada weather in September

Averages from 2021–2025 (150 days of record).

Average high: 96°F
Average low: 72°F
Rainy days: ~1 per month
Total precipitation: 0.5 in
Warmest recorded: 111°F
Coldest recorded: 59°F

Expect September days in Las Vegas, Nevada to top out around 96°F and cool to about 72°F overnight, with roughly 1 days of measurable rain across the month. In recent years September has ranged from 59°F to 111°F.

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Current Las Vegas, Nevada forecast → · Historical data by Open-Meteo (ERA5).