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Las Vegas in September: weather & travel advice
This month's data profile
Heat shapes the decision
Las Vegas in September is climatically mixed. The average daily high is around 35 °C. With about 3 rainy days it is very dry.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
62/100 · #9
Warmth
#4
Dryness
#6
Sun
#6
Published best categories: none
Las Vegas · SeptemberPhoto: King of Hearts · CC BY-SA 3.0Climate facts
- Average high
- 35 °C
- Average low
- 20 °C
- Rainy days (est.)
- 3 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 25 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Score |
|---|---|---|---|---|---|---|---|---|
| August | 40 | 25 | 4 | 15 | 8.8 | 24 | 2.5 | 56 |
| September (selected) | 35 | 20 | 3 | 11 | 7.6 | 25 | 2.3 | 62 |
| October | 28 | 13 | 2 | 11 | 5.8 | 27 | 2.4 | 87 |
How do the previous and next months compare?
Baseline: September (62/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | |
|---|---|---|---|---|---|---|---|---|
| August | -6 | +4.3 °C | +4.3 °C | +1 | +3.5 mm | +1.2 h | -0.8 % | +0.1 m/s |
| October | +25 | -7.4 °C | -7 °C | -0.7 | -0.8 mm | -1.8 h | +2.7 % | ±0 m/s |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Las Vegas in September?
The average daily high is around 35 °C, with an average daily low of about 20 °C.
Does it rain a lot in Las Vegas in September?
The curated estimate is about 3 rainy days per month, not a directly measured long-term average. Total precipitation averages around 11 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Las Vegas?
By the climate score, March, April, October and November are the strongest months for Las Vegas. September is not among them.