Copiapó weather in September

In September, Copiapó sees average daytime highs of 22°C and overnight lows near 10°C, with 2 mm of rain across 0.4 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 84% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Copiapó's 8th-clearest and 8th-windiest month. For the whole year in context, see Copiapó's year-round climate.

Daytime high
22°
8th warmest
Overnight low
10°
5th coldest
Rainfall
2 mm
0.4 wet days
Daylight
11 h 48 min
7:40 AM – 7:31 PM
Cloud cover
15%
8th clearest
Wind
7 km/h
8th windiest
Solar energy
6.77 kWh/m²
Travel score
9.1
out of 10

Copiapó is city in northern Chile.

Air quality
Moderate
PM2.5 12.3 µg/m³ · 2019
Density
3,769/km²
people per km²
Founded
1744

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical September day in Copiapó reaches about 22°C in the afternoon and slips back to 10°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
1229
2229
3229
4229
5229
62210
72210
82210
92210
102210
112210
122210
132210
142210
152210
162210
172210
182210
192211
202211
212211
222211
232211
242211
252211
262311
272311
282311
292311
302311

Copiapó weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 16°0013.59.2
Feb26° / 16°00.1139.3
Mar25° / 15°50.312.29.5
Apr23° / 13°20.311.49.5
May22° / 8110.78.6
Jun20° / 60.810.38.3
Jul20° / 61.210.48.3
Aug21° / 30.6118.7
Sep22° / 10°20.411.89.1
Oct23° / 12°00.212.79.5
Nov24° / 14°00.113.49.7
Dec25° / 15°10.113.79.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 84% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 8% of September, with mostly cloudy or overcast conditions the remaining 8%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18812
28911
39010
49010
59010
6919
7919
8919
9919
10928
11928
12928
13937
14937
15937
16937
17937
18937
19937
20937
21946
22946
23937
24928
25928
26928
27928
28928
29919
30919

Chance of precipitation in September

Any precipitation

Copiapó gets around 2 mm of rain over 0.4 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 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
52
62
72
82
92
102
112
122
132
142
151
161
171
181
191
201
211
221
231
240
250
260
270
280
290
300

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 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over September. Sunrise moves from 7:58 AM to 7:24 AM, and sunset from 7:24 PM to 7:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:587:24
211.57:577:24
311.57:567:25
411.57:557:25
511.57:547:26
611.67:527:26
711.67:517:27
811.67:507:27
911.67:497:28
1011.77:487:28
1111.77:467:29
1211.77:457:29
1311.87:447:29
1411.87:437:30
1511.87:427:30
1611.87:407:31
1711.97:397:31
1811.97:387:32
1911.97:377:32
2012.07:367:33
2112.07:347:33
2212.07:337:34
2312.07:327:34
2412.17:317:35
2512.17:307:35
2612.17:287:36
2712.17:277:36
2812.27:267:37
2912.27:257:37
3012.27:247:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.77 kWh/m².

For context, solar energy here swings from a low near 4.02 kWh/m² to a high of 9.44 kWh/m² in December across the year — September's 6.77 kWh/m² falls in the middle.

02468151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.1Intense
36.2Intense
46.2Intense
56.3Intense
66.3Intense
76.3Intense
86.4Intense
96.5Intense
106.5Intense
116.5Intense
126.6Intense
136.7Intense
146.7Intense
156.8Intense
166.8Intense
176.9Intense
186.9Intense
197.0Intense
207.0Intense
217.0Intense
227.1Intense
237.1Intense
247.2Intense
257.2Intense
267.3Intense
277.3Intense
287.3Intense
297.4Intense
307.4Intense
Planning a trip in September

Is September a good time to visit Copiapó?

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

9.1
Sightseeing
8th-best month of the year
6.3
Beach & pool
8th-best month of the year

September is one of the better times to visit Copiapó for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Copiapó in September

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

In September, Copiapó sees daytime highs around 22°C and nights near 10°C. Pack sun protection. Worth having: light clothes.

sun protectionlight clothes

Sea temperature near Copiapó in September

The nearest coast averages about 14°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 54 km away) is warmest in February at about 19°C and coldest in August near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan19Cool
Feb19Cool
Mar18Cool
Apr17Cool
May16Cool
Jun15Cool
Jul15Bracing
Aug14Bracing
Sep14Bracing
Oct15Bracing
Nov16Cool
Dec17Cool

UV index in Copiapó in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Copiapó peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeHighModerateHighVery highExtremeJan 20UV 15Jun 21UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr7Very high
May6High
Jun5Moderate
Jul5Moderate
Aug7High
Sep9Very high
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Copiapó 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 Copiapó is worst in August — around 17 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (January, 7 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Copiapó's WHO annual average of 12.3 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1217 µg/m³Jan 197 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr16Moderate
May16Moderate
Jun14Moderate
Jul16Moderate
Aug17Moderate
Sep14Moderate
Oct13Moderate
Nov9Good
Dec8Good
Location & terrain

Where is Copiapó?

Copiapó sits at 27.4°S, 70.3°W, 381 m above sea level, in Chile. The nearest listed city is Caldera, 59 km away.

La SerenaVicuñaCoquimboBelénChilecitoOvalle

Topography around Copiapó

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

Within 3 km, the terrain around Copiapó has significant variations in elevation — a maximum elevation change of 504 m around an average of 464 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,341 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,668 m.

The land around Copiapó is covered by bare terrain (55%) and artificial surfaces (43%) within 3 km, bare terrain (94%) within 16 km, and bare terrain (88%) within 80 km.

3 km
504 m
16 km
1,341 m
80 km
4,668 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Caldera 59 km · Vallenar 141 km · La Serena 296 km · Vicuña 299 km · Coquimbo 304 km · Belén 328 km · Chilecito 342 km · Ovalle 369 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 Copiapó (-27.3674°, -70.3322°, elevation 381 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).