What to expect in Las Vegas in September
September is a strong choice for Las Vegas: 34° / 22°, with the biggest crowds of the year and prices close to the yearly average.
Las Vegas weather in September
Typical conditions in Las Vegas during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 34°C 93°F |
|---|---|
| Average low | 22°C 72°F |
| Rainfall | Dry 5/100 |
| Total rainfall | 6 mm0.3 in |
| Rainy days | 2 |
| Daylight | 12 h 26 min |
| How it feels | Hot — midday shade matters |
Average highs sit around 34°C with lows near 22°C. It is one of the drier months — pack light.
Crowds & demand
Crowd levels are High for Las Vegas — the biggest crowds of the year.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Lightweight, breathable clothes, strong sun protection and a refillable bottle — highs near 34°C make midday heat the main constraint. Rain gear is largely optional this month, which keeps your bag light.
What it costs
Costs in September sit around the yearly average for Las Vegas — neither a bargain nor a squeeze. Booking a few weeks out is usually enough. Compared with the most expensive month of the year, you are looking at roughly 14% less.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
Events & what’s on
No major festivals fall in September, so the destination feels like its everyday self.
Las Vegas in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 40° / 27° | Moderate | $$ | 46 |
| August | 39° / 26° | Moderate | $$ | 49 |
| September · This month | 34° / 22° | High | $$ | 50 |
| October | 27° / 15° | High | $$$ | 53 |
| November | 19° / 8° | Moderate | $$ | 57 |
These months score higher for Las Vegas on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
