Peñalolén weather in September

In September, Peñalolén sees average daytime highs of 14°C and overnight lows near 2°C, with 72 mm of precipitation across 9 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 12°C in the first days to 15°C by the end. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels dry.

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

Daytime high
14°
9th warmest
Overnight low
4th coldest
Precipitation
72 mm
9 wet days
Daylight
11 h 48 min
7:43 AM – 7:30 PM
Cloud cover
48%
8th clearest
Wind
4 km/h
11th windiest
Solar energy
5.32 kWh/m²
Travel score
4.1
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 12°C in the first days to 15°C by the end.

A typical September day in Peñalolén reaches about 14°C in the afternoon and slips back to 2°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 19°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

-5°10°15°20°151015202530
Avg high (°C)Avg low (°C)
1121
2121
3121
4121
5121
6131
7131
8131
9131
10131
11132
12132
13132
14132
15142
16142
17142
18142
19142
20142
21142
22142
23142
24142
25143
26153
27153
28153
29153
30153

How September really feels in Peñalolén

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Peñalolén 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan24° / 12°153.90148.8
Feb23° / 11°144.1013.28.7
Mar22° / 10°152.8012.38.6
Apr18° / 394.40.511.27.1
May14° / 807.12.310.34.6
Jun10° / -0°1298.65.39.82.4
Jul / -2°9785.3101.9
Aug11° / -0°9085.210.82.9
Sep14° / 7293.611.84.1
Oct16° / 6211212.85.3
Nov19° / 4510.30.413.76.6
Dec22° / 10°256.7014.27.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45347
55347
65446
75446
85545
95644
105644
115644
125743
135743
145842
155842
166040
176040
186040
196040
206040
216040
226040
236040
246040
255941
265941
275941
285941
295842
305842

Chance of precipitation in September

Any precipitationSnow

Peñalolén gets around 72 mm of rain and snow over 9 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 30% and peaks near 33% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
13016
23016
33016
43115
53115
63015
73015
83014
93014
103014
112913
122913
132913
142912
152812
162812
172811
182811
192811
202810
212910
222910
233010
243010
253110
263110
27329
28329
29339
30339

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.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

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.

0246810151015202530
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 18 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 60 minutes over September. Sunrise moves from 8:04 AM to 7:23 AM, and sunset from 7:20 PM to 7:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.38:047:20
211.38:027:21
311.38:017:21
411.48:007:22
511.47:587:23
611.47:577:23
711.57:557:24
811.57:547:25
911.57:537:26
1011.67:517:26
1111.67:507:27
1211.77:487:28
1311.77:477:28
1411.77:457:29
1511.87:447:30
1611.87:437:30
1711.87:417:31
1811.97:407:32
1911.97:387:32
2011.97:377:33
2112.07:357:34
2212.07:347:35
2312.07:337:35
2412.17:317:36
2512.17:307:37
2612.27:287:37
2712.27:277:38
2812.27:257:39
2912.37:247:40
3012.37:237:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.32 kWh/m².

For context, solar energy here swings from a low near 2.66 kWh/m² to a high of 8.76 kWh/m² in December across the year — September's 5.32 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.7Bright
44.7Bright
54.8Bright
64.8Bright
74.9Bright
84.9Bright
95.0Bright
105.0Bright
115.1Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.4Bright
175.5Bright
185.5Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.9Bright
285.9Bright
296.0Bright
306.0Intense
Planning a trip in September

Hazard calendar for Peñalolén

In seasonPeak

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

Peñalolén's rainy season runs May–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 Peñalolén?

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

4.1
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

September is a reasonable time to visit Peñalolén for sightseeing.

What to pack for Peñalolén in September

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

In September, Peñalolén sees daytime highs around 14°C and nights near 2°C. Worth packing: a warm layer, rain gear and sun protection. About 9 days see rain.

a warm layerrain gearsun protection

UV index in Peñalolén in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Peñalolén peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 17 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 18UV 14Jun 17UV 4
UV index (midday)Level
Jan15Extreme
Feb13Extreme
Mar11Extreme
Apr6High
May4Moderate
Jun4Moderate
Jul4Moderate
Aug6High
Sep7Very high
Oct10Extreme
Nov12Extreme
Dec13Extreme

Air quality in Peñalolén 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 Peñalolén is worst in July — around 108 µg/m³ PM2.5 (unhealthy), about 3.9× the cleanest month (December, 28 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 16107 µg/m³Dec 2128 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb31Moderate
Mar41Poor
Apr56Unhealthy
May80Unhealthy
Jun96Unhealthy
Jul108Unhealthy
Aug95Unhealthy
Sep78Unhealthy
Oct55Poor
Nov35Poor
Dec28Moderate
Location & terrain

Where is Peñalolén?

Peñalolén sits at 33.5°S, 70.5°W, 710 m above sea level, in Chile. The nearest listed city is Ñuñoa, 5.0 km away.

Topography around Peñalolén

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

Within 3 km, the terrain around Peñalolén has large variations in elevation — a maximum elevation change of 763 m around an average of 769 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,741 m; within 80 km, extreme variations in elevation — a maximum elevation change of 6,465 m.

The land around Peñalolén is covered by artificial surfaces (55%) and trees (20%) within 3 km, artificial surfaces (40%) and shrubs (25%) within 16 km, and bare terrain (32%) and shrubs (24%) within 80 km.

3 km
763 m
16 km
2,741 m
80 km
6,465 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and ice
September weather nearby: Ñuñoa 5.0 km · Santiago 11 km · La Pintana 16 km · Puente Alto 16 km · Renca 18 km · Lo Prado 18 km · Quilicura 20 km · San Bernardo 21 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
Catholic 57%none 26%Evangelical or Protestant 16%other Christians and traditions related to Christ 1%

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 Peñalolén (-33.4684°, -70.5341°, elevation 710 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).