Las Vegas weather in September

In September, Las Vegas sees average daytime highs of 31°C and overnight lows near 23°C, with 193 mm of rain across 26.1 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 6% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Las Vegas's 9th-clearest and 10th-windiest month. For the whole year in context, see Las Vegas's year-round climate.

Daytime high: 31°; 9th warmest
Overnight low: 23°; 3rd coldest
Rainfall: 193 mm; 26.1 wet days
Daylight: 12 h 06 min; 5:57 AM – 6:00 PM
Cloud cover: 79%; 9th clearest
Wind: 4 km/h; 10th windiest
Solar energy: 4.86 kWh/m²
Travel score: 2.7; out of 10

← August Las Vegas year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Las Vegas reaches about 31°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 33°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	31	23
6	31	23
7	31	23
8	31	23
9	31	23
10	31	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

How September really feels in Las Vegas

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Las Vegas weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	34° / 23°	9	2.2	11.5	3.4
Feb	35° / 24°	8	1.9	11.7	2.8
Mar	36° / 25°	30	5.1	11.9	2.3
Apr	34° / 25°	135	15.1	12.2	2.4
May	32° / 24°	267	24.4	12.4	2.6
Jun	30° / 23°	272	26	12.5	2.8
Jul	30° / 23°	245	28	12.5	2.8
Aug	30° / 23°	218	27.7	12.3	2.8
Sep	31° / 23°	193	26.1	12.1	2.7
Oct	32° / 23°	172	25	11.8	2.7
Nov	32° / 23°	111	18.5	11.6	3.0
Dec	33° / 23°	40	7.5	11.5	3.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 80%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	22	22	22	22	23	22	22	22	21	21	21	20	20	20	19	19	19	18	17	17	17	17	17	17	17	17	17	17	18	18
Cloudier (%)	78	78	78	78	77	78	78	78	79	79	79	80	80	80	81	81	81	82	83	83	83	83	83	83	83	83	83	83	82	82

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	22	78
4	22	78
5	23	77
6	22	78
7	22	78
8	22	78
9	21	79
10	21	79
11	21	79
12	20	80
13	20	80
14	20	80
15	19	81
16	19	81
17	19	81
18	18	82
19	17	83
20	17	83
21	17	83
22	17	83
23	17	83
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	18	82
30	18	82

Chance of precipitation in September

Any precipitation

Las Vegas gets around 193 mm of rain over 26.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 89% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	86	86	86	86	86	87	87	87	88	88	88	89	89	89	89	89	89	89	88	88	87	87	86	85	85	84	84	83	83	83

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	87
7	87
8	87
9	88
10	88
11	88
12	89
13	89
14	89
15	89
16	89
17	89
18	89
19	88
20	88
21	87
22	87
23	86
24	85
25	85
26	84
27	84
28	83
29	83
30	83

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 70% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	75	75	75	74	74	74	74	74	74	73	73	73	72	71	71	70	69	69	68	68	67	67	67	67	66	66	66	67	67	67
Miserable (%)	25	25	25	26	26	26	26	26	26	27	27	27	28	29	29	30	31	31	32	32	33	33	33	33	34	34	34	33	33	33

	Oppressive (%)	Miserable (%)
1	75	25
2	75	25
3	75	25
4	74	26
5	74	26
6	74	26
7	74	26
8	74	26
9	74	26
10	73	27
11	73	27
12	73	27
13	72	28
14	71	29
15	71	29
16	70	30
17	69	31
18	69	31
19	68	32
20	68	32
21	67	33
22	67	33
23	67	33
24	67	33
25	66	34
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

Wind in September

Winds average 4 km/h in September.

Across September, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	4	calm
2	4	calm
3	4	calm
4	4	calm
5	4	calm
6	4	calm
7	4	calm
8	4	calm
9	4	calm
10	4	calm
11	4	calm
12	4	calm
13	4	calm
14	4	calm
15	4	calm
16	4	calm
17	4	calm
18	4	calm
19	4	calm
20	4	calm
21	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 5:59 AM to 5:56 AM, and sunset from 6:10 PM to 5:52 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9
Sunrise (AM)	5:59	5:59	5:59	5:58	5:58	5:58	5:58	5:58	5:58	5:58	5:58	5:58	5:58	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:57	5:56	5:56	5:56	5:56	5:56	5:56
Sunset (PM)	6:10	6:09	6:09	6:08	6:07	6:07	6:06	6:06	6:05	6:04	6:04	6:03	6:02	6:02	6:01	6:00	6:00	5:59	5:58	5:58	5:57	5:57	5:56	5:55	5:55	5:54	5:53	5:53	5:52	5:52

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.2	5:59	6:10
2	12.2	5:59	6:09
3	12.2	5:59	6:09
4	12.2	5:58	6:08
5	12.2	5:58	6:07
6	12.1	5:58	6:07
7	12.1	5:58	6:06
8	12.1	5:58	6:06
9	12.1	5:58	6:05
10	12.1	5:58	6:04
11	12.1	5:58	6:04
12	12.1	5:58	6:03
13	12.1	5:58	6:02
14	12.1	5:57	6:02
15	12.1	5:57	6:01
16	12.1	5:57	6:00
17	12.0	5:57	6:00
18	12.0	5:57	5:59
19	12.0	5:57	5:58
20	12.0	5:57	5:58
21	12.0	5:57	5:57
22	12.0	5:57	5:57
23	12.0	5:57	5:56
24	12.0	5:57	5:55
25	12.0	5:56	5:55
26	12.0	5:56	5:54
27	12.0	5:56	5:53
28	11.9	5:56	5:53
29	11.9	5:56	5:52
30	11.9	5:56	5:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.86 kWh/m².

For context, solar energy here swings from a low near 4.18 kWh/m² to a high of 5.87 kWh/m² in March across the year — September's 4.86 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9	4.9
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.8	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.8	Bright
8	4.9	Bright
9	4.9	Bright
10	4.9	Bright
11	4.9	Bright
12	4.9	Bright
13	4.9	Bright
14	4.9	Bright
15	4.9	Bright
16	4.9	Bright
17	4.9	Bright
18	4.9	Bright
19	4.9	Bright
20	4.9	Bright
21	4.9	Bright
22	4.9	Bright
23	4.9	Bright
24	4.9	Bright
25	4.9	Bright
26	4.9	Bright
27	4.9	Bright
28	4.9	Bright
29	4.9	Bright
30	4.9	Bright

Planning a trip in September

Hazard calendar for Las Vegas

In seasonPeak

In September, Las Vegas sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Las Vegas's rainy season runs April–October, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Las Vegas?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.7

Sightseeing

8th-best month of the year

4.0

Beach & pool

10th-best month of the year

September is a weaker month for outdoor sightseeing in Las Vegas.

What to pack for Las Vegas in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Las Vegas sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Las Vegas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Las Vegas peaks around February 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	11	13	13	13	11	12	12	12	13	12	9	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	13	Extreme
Mar	13	Extreme
Apr	13	Extreme
May	11	Extreme
Jun	12	Extreme
Jul	12	Extreme
Aug	12	Extreme
Sep	13	Extreme
Oct	12	Extreme
Nov	9	Very high
Dec	9	Very high

Air quality in Las Vegas in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Las Vegas is worst in March — around 33 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 14 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	20	33	31	30	30	25	22	21	21	18	14
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	20	Moderate
Mar	33	Moderate
Apr	31	Moderate
May	30	Moderate
Jun	30	Moderate
Jul	25	Moderate
Aug	22	Moderate
Sep	21	Moderate
Oct	21	Moderate
Nov	18	Moderate
Dec	14	Moderate

Location & terrain

Where is Las Vegas?

Las Vegas sits at 9.5°N, 68.6°W, 120 m above sea level, in Venezuela. The nearest listed city is San Carlos, 15 km away.

Topography around Las Vegas

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Las Vegas.

Within 3 km, the terrain around Las Vegas has only modest variations in elevation — a maximum elevation change of 27 m around an average of 115 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 195 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,700 m.

The land around Las Vegas is covered by grassland (50%) and trees (29%) within 3 km, grassland (53%) and trees (41%) within 16 km, and trees (48%) and grassland (40%) within 80 km.

3 km

27 m

grassland 50%

16 km

195 m

grassland 53%

80 km

1,700 m

trees 48%

treesshrubsgrasslandcroplandartificial surfaces

← August Las Vegas year-round climate October →Best places to visit in September

September weather nearby: San Carlos 15 km · Tinaco 28 km · San Rafael de Onoto 41 km · Tinaquillo 55 km · El Pao 56 km · Villa Bruzual 58 km · Acarigua 62 km · Píritu 66 km

Venezuela travel facts

Travel advisory: Level 3; Reconsider Travel
Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 0% of US; price level, 2011
GDP per capita: $3,495; 2025
Happiness: 5.8 / 10; World Happiness, 2025
Homicide rate: 12.6; per 100k, 2022
Road deaths: 39; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Moderate; EF EPI 520
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Las Vegas (9.5372°, -68.6302°, elevation 120 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	31	23
6	31	23
7	31	23
8	31	23
9	31	23
10	31	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	22	78
4	22	78
5	23	77
6	22	78
7	22	78
8	22	78
9	21	79
10	21	79
11	21	79
12	20	80
13	20	80
14	20	80
15	19	81
16	19	81
17	19	81
18	18	82
19	17	83
20	17	83
21	17	83
22	17	83
23	17	83
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	18	82
30	18	82

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	87
7	87
8	87
9	88
10	88
11	88
12	89
13	89
14	89
15	89
16	89
17	89
18	89
19	88
20	88
21	87
22	87
23	86
24	85
25	85
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	75	25
2	75	25
3	75	25
4	74	26
5	74	26
6	74	26
7	74	26
8	74	26
9	74	26
10	73	27
11	73	27
12	73	27
13	72	28
14	71	29
15	71	29
16	70	30
17	69	31
18	69	31
19	68	32
20	68	32
21	67	33
22	67	33
23	67	33
24	67	33
25	66	34
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	31	23
6	31	23
7	31	23
8	31	23
9	31	23
10	31	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	22	78
4	22	78
5	23	77
6	22	78
7	22	78
8	22	78
9	21	79
10	21	79
11	21	79
12	20	80
13	20	80
14	20	80
15	19	81
16	19	81
17	19	81
18	18	82
19	17	83
20	17	83
21	17	83
22	17	83
23	17	83
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	18	82
30	18	82

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	87
7	87
8	87
9	88
10	88
11	88
12	89
13	89
14	89
15	89
16	89
17	89
18	89
19	88
20	88
21	87
22	87
23	86
24	85
25	85
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	75	25
2	75	25
3	75	25
4	74	26
5	74	26
6	74	26
7	74	26
8	74	26
9	74	26
10	73	27
11	73	27
12	73	27
13	72	28
14	71	29
15	71	29
16	70	30
17	69	31
18	69	31
19	68	32
20	68	32
21	67	33
22	67	33
23	67	33
24	67	33
25	66	34
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33

	Avg high (°C)	Avg low (°C)
1	31	23
2	31	23
3	31	23
4	31	23
5	31	23
6	31	23
7	31	23
8	31	23
9	31	23
10	31	23
11	31	23
12	31	23
13	31	23
14	31	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	22	78
4	22	78
5	23	77
6	22	78
7	22	78
8	22	78
9	21	79
10	21	79
11	21	79
12	20	80
13	20	80
14	20	80
15	19	81
16	19	81
17	19	81
18	18	82
19	17	83
20	17	83
21	17	83
22	17	83
23	17	83
24	17	83
25	17	83
26	17	83
27	17	83
28	17	83
29	18	82
30	18	82

	Rain chance (%)
1	86
2	86
3	86
4	86
5	86
6	87
7	87
8	87
9	88
10	88
11	88
12	89
13	89
14	89
15	89
16	89
17	89
18	89
19	88
20	88
21	87
22	87
23	86
24	85
25	85
26	84
27	84
28	83
29	83
30	83

	Oppressive (%)	Miserable (%)
1	75	25
2	75	25
3	75	25
4	74	26
5	74	26
6	74	26
7	74	26
8	74	26
9	74	26
10	73	27
11	73	27
12	73	27
13	72	28
14	71	29
15	71	29
16	70	30
17	69	31
18	69	31
19	68	32
20	68	32
21	67	33
22	67	33
23	67	33
24	67	33
25	66	34
26	66	34
27	66	34
28	67	33
29	67	33
30	67	33