Las Vegas weather in September
Las Vegas in September averages 28°C (83°F) and 8 mm of rain. It is one of the driest months of the year here.
Of the twelve months in Las Vegas, September is the fourth warmest and the sixth driest.
- Average temp
- 28°C (83°F)
22–35°C · 72–94°F
- Rainfall
- 8 mm
Not much rain
- Sunshine
- —
- Wind
- 12 km/h
What is Las Vegas like in September?
Daytime
Days are hot, often above 32°C.
Rain
Rain is usually light.
Evening
Evenings stay warm.
What should I pack for Las Vegas in September?
High-factor sun cream
With daytime highs around 35°C, burn time is short even in shade.
Sunglasses and a brimmed hat
Midday glare is the part people underpack for, not the heat itself.
Loose cotton or linen
Synthetics stop working once you are sweating through them all day.
A refillable water bottle
Daily highs this warm need roughly double the water a temperate day does.
A layer for the evening
The day swings about 12°C between its low and its high.
Comfortable walking shoes you can rinse
Dry warm weather is walking weather, and dust gets into everything.
September compared with August and October
September in Las Vegas is 4°C cooler than August and about as wet as it, which averages 32°C (90°F).
September in Las Vegas is 7.4°C warmer than October and about as wet as it, which averages 21°C (70°F).
Daylight in Las Vegas in September
On 15 September the sun is up for 12 hours 23 minutes in Las Vegas, rising about 06:23 and setting about 18:46 local time.
September ends 1 hour 6 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 2 hours 14 minutes short of June, the longest-lit month here.
Where to stay in Las Vegas
Dates are a starting point for September.
Las Vegas weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 9°C / 49°F | 14 mm |
| February | 12°C / 54°F | 21 mm |
| March | 12°C / 54°F | 11 mm |
| April | 20°C / 68°F | 5 mm |
| May | 25°C / 76°F | 2 mm |
| June | 31°C / 88°F | 1 mm |
| July | 34°C / 92°F | 9 mm |
| August | 32°C / 90°F | 8 mm |
| September | 28°C / 83°F | 8 mm |
| October | 21°C / 70°F | 8 mm |
| November | 14°C / 57°F | 8 mm |
| December | 10°C / 49°F | 11 mm |
Check another month
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FAQs about Las Vegas in September
September climate averages for Las Vegas, 1991–2020.
Las Vegas averages 28°C (83°F) in September, ranging from about 22°C (72°F) at night to 35°C (94°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Barely. September sees only about 8 mm, so rain is unlikely to affect your plans.
Yes. September averages 28°C (83°F) against 21°C (70°F) in October — 7.4°C warmer.
September is 4°C cooler than August, and about as wet.
It is outside the easiest window. The most comfortable stretch here is April to June; September sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 23 minutes of daylight in mid-September, against 14 hours 37 minutes in June and 9 hours 43 minutes in December.
On 15 September, sunrise is about 06:23 and sunset about 18:46 local time. Both shift across the month — the month ends 1 hour 6 minutes shorter than it starts.
