San Esteban weather in September

In September, San Esteban sees average daytime highs of 10°C and overnight lows near 0°C, with 48 mm of precipitation across 7.3 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 9°C in the first days to 12°C by the end. The sky is clear or mostly clear about 51% 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 San Esteban's 8th-clearest and 12th-windiest month. For the whole year in context, see San Esteban's year-round climate.

Daytime high
10°
9th warmest
Overnight low
4th coldest
Precipitation
48 mm
7.3 wet days
Daylight
11 h 48 min
7:43 AM – 7:31 PM
Cloud cover
43%
8th clearest
Wind
5 km/h
12th windiest
Solar energy
5.73 kWh/m²
Travel score
2.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 9°C in the first days to 12°C by the end.

A typical September day in San Esteban reaches about 10°C in the afternoon and slips back to 0°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 15°C. Set against its neighbours, September runs about 3°C warmer than August and about 3°C cooler than October.

-10°10°20°151015202530
Avg high (°C)Avg low (°C)
19-1
290
390
490
590
690
790
8100
9100
10100
11100
12100
13100
14100
15100
16100
17110
18110
19110
20110
21110
22110
23110
24111
25111
26111
27121
28121
29121
30121

How September really feels in San Esteban

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 18 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
18
wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

San Esteban 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
Jan21° / 11°175013.98.1
Feb21° / 11°134.1013.28.1
Mar20° / 132.60.212.28.1
Apr16° / 273.90.711.26.2
May12° / 606.43.510.33.6
Jun / -2°1067.46.39.91.2
Jul / -3°736.75.910.10.6
Aug / -2°696.65.610.81.4
Sep10° / 487.34.111.82.7
Oct14° / 4392.312.84.3
Nov17° / 328.20.413.76.1
Dec20° / 226014.17.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% 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 36%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
36040
46040
56040
66139
76238
86238
96337
106436
116535
126436
136535
146535
156634
166634
176733
186634
196634
206634
216634
226634
236634
246634
256634
266634
276634
286634
296634
306634

Chance of precipitation in September

Any precipitationSnow

San Esteban gets around 48 mm of rain and snow over 7.3 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 24% and peaks near 28% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202530
Rain chance (%)Snow chance (%)
12719
22719
32819
42818
52718
62718
72717
82617
92616
102516
112515
122415
132415
142314
152314
162313
172213
182212
192212
202212
212211
222211
232211
242311
252311
262311
272310
282410
292410
302410

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 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 8:03 AM to 7:23 AM, and sunset from 7:21 PM to 7:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.38:037:21
211.38:027:21
311.48:017:22
411.47:597:23
511.47:587:23
611.57:577:24
711.57:557:25
811.57:547:25
911.67:527:26
1011.67:517:27
1111.67:507:27
1211.77:487:28
1311.77:477:29
1411.77:457:29
1511.87:447:30
1611.87:437:31
1711.87:417:31
1811.97:407:32
1911.97:387:33
2011.97:377:33
2112.07:367:34
2212.07:347:35
2312.07:337:35
2412.17:317:36
2512.17:307:37
2612.17:297:37
2712.27:277:38
2812.27:267:39
2912.37:247:39
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 5.73 kWh/m².

For context, solar energy here swings from a low near 2.97 kWh/m² to a high of 8.99 kWh/m² in December across the year — September's 5.73 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.1Bright
45.1Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.4Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.7Bright
155.8Bright
165.8Bright
175.9Bright
185.9Bright
196.0Bright
206.0Intense
216.1Intense
226.1Intense
236.2Intense
246.2Intense
256.2Intense
266.3Intense
276.3Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for San Esteban

In seasonPeak

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

San Esteban's rainy season runs May–September, 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 San Esteban?

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

2.7
Sightseeing
9th-best month of the year
0.0
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in San Esteban.

What to pack for San Esteban in September

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

In September, San Esteban sees daytime highs around 10°C and nights near 0°C. Pack a warm layer. Worth having: sun protection. About 7 days see rain.

a warm layersun protection

UV index in San Esteban in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Esteban peaks around January 18 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 16Jun 22UV 5
UV index (midday)Level
Jan16Extreme
Feb15Extreme
Mar12Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug7High
Sep8Very high
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in San Esteban 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 San Esteban is worst in July — around 118 µg/m³ PM2.5 (unhealthy), about 4.8× the cleanest month (January, 25 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyPoorModerateJul 16116 µg/m³Jan 1225 µg/m³
PM2.5 (µg/m³)Level
Jan25Moderate
Feb28Moderate
Mar41Poor
Apr58Unhealthy
May84Unhealthy
Jun104Unhealthy
Jul118Unhealthy
Aug102Unhealthy
Sep82Unhealthy
Oct55Poor
Nov36Poor
Dec26Moderate
Location & terrain

Where is San Esteban?

San Esteban sits at 32.8°S, 70.6°W, 841 m above sea level, in Chile. The nearest listed city is Los Andes, 4.0 km away.

Topography around San Esteban

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

Within 3 km, the terrain around San Esteban has only modest variations in elevation — a maximum elevation change of 194 m around an average of 836 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,627 m; within 80 km, extreme variations in elevation — a maximum elevation change of 6,835 m.

The land around San Esteban is covered by cropland (53%) within 3 km, shrubs (36%) and grassland (26%) within 16 km, and bare terrain (39%) and shrubs (29%) within 80 km.

3 km
194 m
16 km
2,627 m
80 km
6,835 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater
September weather nearby: Los Andes 4.0 km · San Felipe 15 km · Putaendo 23 km · Llaillay 35 km · Colina 46 km · Batuco 53 km · Chicureo 54 km · La Calera 58 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 San Esteban (-32.7987°, -70.5807°, elevation 841 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).