Los Ángeles weather in September

In September, Los Ángeles sees average daytime highs of 16°C and overnight lows near 6°C, with 94 mm of rain across 9.5 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 17°C by the end. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Los Ángeles's 8th-clearest and 8th-windiest month. For the whole year in context, see Los Ángeles's year-round climate.

Daytime high: 16°; 8th warmest
Overnight low: 6°; 4th coldest
Rainfall: 94 mm; 9.5 wet days
Daylight: 11 h 48 min; 7:51 AM – 7:37 PM
Cloud cover: 55%; 8th clearest
Wind: 12 km/h; 8th windiest
Solar energy: 4.33 kWh/m²
Travel score: 5.0; out of 10

Los Ángeles is city in Chile.

Air quality: Elevated; PM2.5 22.5 µg/m³ · 2019
Density: 4,182/km²; people per km²
Founded: 1739

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Los Ángeles 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

Highs climb over the month, from about 15°C in the first days to 17°C by the end.

A typical September day in Los Ángeles reaches about 16°C in the afternoon and slips back to 6°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 20°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than 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)	15	15	15	15	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17
Avg low (°C)	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	7	7

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

Los Ángeles weather by month

How September compares with the rest of the year at a glance. September is the 8th-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	26° / 12°	15	2	14.3	8.6
Feb	26° / 12°	25	2.5	13.4	8.6
Mar	23° / 10°	34	3.9	12.3	8.4
Apr	19° / 8°	85	6.8	11.1	6.6
May	15° / 6°	178	11	10	4.4
Jun	12° / 5°	252	15.5	9.5	2.8
Jul	12° / 4°	193	14	9.7	2.9
Aug	13° / 5°	169	13	10.6	3.6
Sep	16° / 6°	94	9.5	11.7	5.0
Oct	18° / 7°	71	8.1	13	6.3
Nov	21° / 9°	40	5.2	14	7.5
Dec	24° / 11°	30	3.9	14.5	8.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 50%.

	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 (%)	43	43	45	47	47	49	50	51	52	51	52	52	52	53	53	53	53	53	53	53	52	51	51	51	49	50	50	50	50	49
Cloudier (%)	57	57	55	53	53	51	50	49	48	49	48	48	48	47	47	47	47	47	47	47	48	49	49	49	51	50	50	50	50	51

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	45	55
4	47	53
5	47	53
6	49	51
7	50	50
8	51	49
9	52	48
10	51	49
11	52	48
12	52	48
13	52	48
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	51	49
23	51	49
24	51	49
25	49	51
26	50	50
27	50	50
28	50	50
29	50	50
30	49	51

Chance of precipitation in September

Any precipitation

Los Ángeles gets around 94 mm of rain over 9.5 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 32% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

	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 (%)	39	39	38	37	36	36	35	35	34	34	34	33	33	32	32	31	31	30	30	30	29	29	29	29	29	29	28	28	28	28

	Rain chance (%)
1	39
2	39
3	38
4	37
5	36
6	36
7	35
8	35
9	34
10	34
11	34
12	33
13	33
14	32
15	32
16	31
17	31
18	30
19	30
20	30
21	29
22	29
23	29
24	29
25	29
26	29
27	28
28	28
29	28
30	28

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	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
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 13 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)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	calm	calm	calm

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

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over September. Sunrise moves from 8:14 AM to 7:29 AM, and sunset from 7:24 PM to 7:49 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)	11.2	11.2	11.2	11.3	11.3	11.4	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.8	11.9	11.9	12.0	12.0	12.1	12.1	12.1	12.2	12.2	12.3	12.3	12.3
Sunrise (AM)	8:14	8:13	8:11	8:10	8:08	8:07	8:05	8:04	8:02	8:00	7:59	7:57	7:56	7:54	7:52	7:51	7:49	7:48	7:46	7:44	7:43	7:41	7:40	7:38	7:36	7:35	7:33	7:32	7:30	7:29
Sunset (PM)	7:24	7:25	7:25	7:26	7:27	7:28	7:29	7:30	7:31	7:31	7:32	7:33	7:34	7:35	7:36	7:37	7:37	7:38	7:39	7:40	7:41	7:42	7:43	7:44	7:44	7:45	7:46	7:47	7:48	7:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.2	8:14	7:24
2	11.2	8:13	7:25
3	11.2	8:11	7:25
4	11.3	8:10	7:26
5	11.3	8:08	7:27
6	11.4	8:07	7:28
7	11.4	8:05	7:29
8	11.4	8:04	7:30
9	11.5	8:02	7:31
10	11.5	8:00	7:31
11	11.6	7:59	7:32
12	11.6	7:57	7:33
13	11.6	7:56	7:34
14	11.7	7:54	7:35
15	11.7	7:52	7:36
16	11.8	7:51	7:37
17	11.8	7:49	7:37
18	11.8	7:48	7:38
19	11.9	7:46	7:39
20	11.9	7:44	7:40
21	12.0	7:43	7:41
22	12.0	7:41	7:42
23	12.1	7:40	7:43
24	12.1	7:38	7:44
25	12.1	7:36	7:44
26	12.2	7:35	7:45
27	12.2	7:33	7:46
28	12.3	7:32	7:47
29	12.3	7:30	7:48
30	12.3	7:29	7:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.33 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 8.35 kWh/m² in January across the year — September's 4.33 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)	3.5	3.5	3.6	3.6	3.7	3.8	3.8	3.9	3.9	4.0	4.1	4.1	4.2	4.2	4.3	4.4	4.4	4.5	4.5	4.6	4.6	4.7	4.7	4.8	4.8	4.9	4.9	5.0	5.0	5.1
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	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	3.5	Moderate
2	3.5	Moderate
3	3.6	Moderate
4	3.6	Moderate
5	3.7	Moderate
6	3.8	Moderate
7	3.8	Moderate
8	3.9	Moderate
9	3.9	Moderate
10	4.0	Bright
11	4.1	Bright
12	4.1	Bright
13	4.2	Bright
14	4.2	Bright
15	4.3	Bright
16	4.4	Bright
17	4.4	Bright
18	4.5	Bright
19	4.5	Bright
20	4.6	Bright
21	4.6	Bright
22	4.7	Bright
23	4.7	Bright
24	4.8	Bright
25	4.8	Bright
26	4.9	Bright
27	4.9	Bright
28	5.0	Bright
29	5.0	Bright
30	5.1	Bright

Planning a trip in September

Hazard calendar for Los Ángeles

In seasonPeak

None of Los Ángeles's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Los Ángeles's rainy season runs May–August, 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 Los Ángeles?

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

5.0

Sightseeing

8th-best month of the year

0.6

Beach & pool

8th-best month of the year

September is a reasonable time to visit Los Ángeles for sightseeing.

What to pack for Los Ángeles in September

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

In September, Los Ángeles sees daytime highs around 16°C and nights near 6°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Los Ángeles in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Los Ángeles peaks around January 11 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 15 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	12	11	8	5	2	2	2	3	5	8	10	12
Level	Extreme	Extreme	Very high	Moderate	Moderate	Low	Moderate	Moderate	Moderate	Very high	Very high	Extreme

	UV index (midday)	Level
Jan	12	Extreme
Feb	11	Extreme
Mar	8	Very high
Apr	5	Moderate
May	2	Moderate
Jun	2	Low
Jul	2	Moderate
Aug	3	Moderate
Sep	5	Moderate
Oct	8	Very high
Nov	10	Very high
Dec	12	Extreme

Air quality in Los Ángeles 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 Los Ángeles is worst in April — around 39 µg/m³ PM2.5 (poor), about 3.0× the cleanest month (December, 13 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Los Ángeles's WHO annual average of 22.5 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	38	31	39	37	16	15	18	18	18	13	13
Level	Moderate	Poor	Moderate	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	38	Poor
Mar	31	Moderate
Apr	39	Poor
May	37	Poor
Jun	16	Moderate
Jul	15	Moderate
Aug	18	Moderate
Sep	18	Moderate
Oct	18	Moderate
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is Los Ángeles?

Los Ángeles sits at 37.5°S, 72.4°W, 141 m above sea level, in Chile. The nearest listed city is Nacimiento, 28 km away.

Topography around Los Ángeles

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

Within 3 km, the terrain around Los Ángeles has only modest variations in elevation — a maximum elevation change of 67 m around an average of 137 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 228 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,178 m.

The land around Los Ángeles is covered by artificial surfaces (52%) and trees (23%) within 3 km, trees (40%), grassland (26%) and cropland (24%) within 16 km, and trees (68%) within 80 km.

3 km

67 m

artificial surfaces 52%

16 km

228 m

trees 40%

80 km

3,178 m

trees 68%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← August Los Ángeles year-round climate October →Best places to visit in September

September weather nearby: Nacimiento 28 km · Mulchén 29 km · Villa Mercedes 34 km · Angol 48 km · Cabrero 49 km · Collipulli 54 km · Hualqui 76 km · Quillón 81 km

Chile travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / L; 220 V · 50 Hz
Prices: ≈ 48% of US; price level, 2025
GDP per capita: $17,995; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 6.3; per 100k, 2023
Road deaths: 14.9; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 517
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 Los Ángeles (-37.4697°, -72.3537°, elevation 141 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	15	5
2	15	5
3	15	5
4	15	5
5	15	5
6	15	5
7	15	5
8	15	5
9	15	5
10	15	5
11	15	5
12	15	5
13	15	6
14	16	6
15	16	6
16	16	6
17	16	6
18	16	6
19	16	6
20	16	6
21	16	6
22	16	6
23	16	6
24	17	6
25	17	6
26	17	6
27	17	6
28	17	6
29	17	7
30	17	7

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	45	55
4	47	53
5	47	53
6	49	51
7	50	50
8	51	49
9	52	48
10	51	49
11	52	48
12	52	48
13	52	48
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	51	49
23	51	49
24	51	49
25	49	51
26	50	50
27	50	50
28	50	50
29	50	50
30	49	51

	Rain chance (%)
1	39
2	39
3	38
4	37
5	36
6	36
7	35
8	35
9	34
10	34
11	34
12	33
13	33
14	32
15	32
16	31
17	31
18	30
19	30
20	30
21	29
22	29
23	29
24	29
25	29
26	29
27	28
28	28
29	28
30	28

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	45	55
4	47	53
5	47	53
6	49	51
7	50	50
8	51	49
9	52	48
10	51	49
11	52	48
12	52	48
13	52	48
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	51	49
23	51	49
24	51	49
25	49	51
26	50	50
27	50	50
28	50	50
29	50	50
30	49	51

	Rain chance (%)
1	39
2	39
3	38
4	37
5	36
6	36
7	35
8	35
9	34
10	34
11	34
12	33
13	33
14	32
15	32
16	31
17	31
18	30
19	30
20	30
21	29
22	29
23	29
24	29
25	29
26	29
27	28
28	28
29	28
30	28

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

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

	Clearer (%)	Cloudier (%)
1	43	57
2	43	57
3	45	55
4	47	53
5	47	53
6	49	51
7	50	50
8	51	49
9	52	48
10	51	49
11	52	48
12	52	48
13	52	48
14	53	47
15	53	47
16	53	47
17	53	47
18	53	47
19	53	47
20	53	47
21	52	48
22	51	49
23	51	49
24	51	49
25	49	51
26	50	50
27	50	50
28	50	50
29	50	50
30	49	51

	Rain chance (%)
1	39
2	39
3	38
4	37
5	36
6	36
7	35
8	35
9	34
10	34
11	34
12	33
13	33
14	32
15	32
16	31
17	31
18	30
19	30
20	30
21	29
22	29
23	29
24	29
25	29
26	29
27	28
28	28
29	28
30	28

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100