Avg High
Las Vegas in September
Verdict
In Las Vegas, September has a distinct autumn feel. As the season moves along, temperatures are dropping quickly. You can usually expect a hot month that feels reliable day to day. The atmosphere is generally sunny and dry, perfect for uninterrupted outdoor plans.
It suits travellers who want straightforward weather for sightseeing and day trips. A breeze can shift the feel of the day, especially later on.
Avg Low
Rain
Daylight
12h
What to expect
- Daytime feel - Intense heat where evenings can feel like a different season. It can feel cooler than the thermometer suggests.
- Rain pattern - Mostly dry. Rain is usually intermittent rather than relentless. A light shower is possible, but not a daily feature.
- Sun & UV - High UV at midday. Cloud cover doesn't always mean low UV, so still protect your skin. Shade breaks feel genuinely worthwhile.
- Exposure - Light air, and expect sharp gusts that can change plans in exposed areas. A light outer layer helps when you’re in the shade.
September in context
How it compares to the rest of the year in Las Vegas.
Hottest (avg)
#4 / 12
Wettest (avg)
#7 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#8 / 12
Highest UV
#6 / 12
Most Humid
#7 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 12.4 hours
- UV index (max)
- 8
- Typical sun hours
- 05:23 – 17:46
Rain & Snow
- Total
-
- Rainy days
- 2
- Cloud cover
- 14%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 24%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is September a good time to visit Las Vegas?
Typical September days in Las Vegas reach highs of 34°C (93°F) with nights around 21°C (70°F). It usually feels very hot by day and mild after dark. Overall, September sits in the middle of the Las Vegas climate range.
What are temperatures like in September?
Daytime temperatures in September typically peak near 34°C (93°F), while nights drop to around 21°C (70°F). Expect very hot afternoons and mild evenings.
How much does it rain in September?
Rainfall in September averages 8 mm (0.31 in) across roughly 2 days. Overall it is a mostly dry time of year, so showers are usually brief rather than all-day downpours.
How many hours of daylight are there in September?
You can expect about 12 hours of daylight in September. Sunrise is typically around 05:23 and sunset near 17:46. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in September?
UV levels are often high (around 8). Regular sunscreen and a hat are recommended.
Is it windy in September?
In September, average wind speeds are around 8 km/h (5 mph), with gusts on the windiest days reaching about 47 km/h (29 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.