Coquimbo weather in September

In September, Coquimbo sees average daytime highs of 18°C and overnight lows near 11°C, with 5 mm of rain across 0.9 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 56% 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 18 min by month's end. Set against the rest of the year, September is Coquimbo's 7th-clearest and 7th-windiest month. For the whole year in context, see Coquimbo's year-round climate.

Daytime high
18°
8th warmest
Overnight low
11°
4th coldest
Rainfall
5 mm
0.9 wet days
Daylight
11 h 48 min
7:45 AM – 7:34 PM
Cloud cover
40%
7th clearest
Wind
6 km/h
7th windiest
Solar energy
5.53 kWh/m²
Travel score
7.5
out of 10

Coquimbo is city of Chile.

Air quality
Moderate
PM2.5 11.9 µg/m³ · 2019
Density
3,027/km²
people per km²
Founded
1867

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 18°C through the month.

A typical September day in Coquimbo reaches about 18°C in the afternoon and slips back to 11°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 21°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11810
21810
31810
41810
51810
61810
71810
81810
91810
101810
111810
121810
131811
141811
151811
161811
171811
181811
191811
201811
211811
221911
231911
241911
251911
261911
271911
281911
291911
301911

Coquimbo 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.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 16°00.113.79.2
Feb23° / 16°1013.19.1
Mar22° / 15°50.412.28.7
Apr20° / 14°30.711.38.0
May18° / 12°21210.57.1
Jun17° / 10°302.510.16.3
Jul16° / 161.910.36.3
Aug17° / 151.910.96.8
Sep18° / 11°50.911.87.5
Oct20° / 12°50.612.78.1
Nov21° / 13°10.113.58.7
Dec22° / 15°10.113.99.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% 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 30%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66733
76832
86832
96832
106931
116832
126832
136931
146931
157030
167030
177129
187129
197129
207129
217228
227228
237228
247129
257129
267129
277129
287129
297129
307228

Chance of precipitation in September

Any precipitation

Coquimbo gets around 5 mm of rain over 0.9 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 3% and peaks near 5% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
15
25
34
44
54
64
74
84
94
104
114
124
134
143
153
163
173
183
192
202
212
222
232
242
252
262
272
282
292
302

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 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 54 minutes over September. Sunrise moves from 8:04 AM to 7:27 AM, and sunset from 7:26 PM to 7:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.48:047:26
211.48:037:27
311.48:027:27
411.58:007:28
511.57:597:28
611.57:587:29
711.57:577:29
811.67:557:30
911.67:547:30
1011.67:537:31
1111.77:527:32
1211.77:507:32
1311.77:497:33
1411.87:487:33
1511.87:467:34
1611.87:457:34
1711.97:447:35
1811.97:427:35
1911.97:417:36
2011.97:407:37
2112.07:397:37
2212.07:377:38
2312.07:367:38
2412.17:357:39
2512.17:337:39
2612.17:327:40
2712.27:317:41
2812.27:307:41
2912.27:287:42
3012.37:277:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.53 kWh/m².

For context, solar energy here swings from a low near 3.04 kWh/m² to a high of 8.4 kWh/m² in December across the year — September's 5.53 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.9Bright
34.9Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.3Bright
115.3Bright
125.4Bright
135.4Bright
145.5Bright
155.5Bright
165.6Bright
175.6Bright
185.7Bright
195.7Bright
205.8Bright
215.8Bright
225.9Bright
235.9Bright
246.0Bright
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.2Intense
306.2Intense
Planning a trip in September

Is September a good time to visit Coquimbo?

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

7.5
Sightseeing
8th-best month of the year
2.6
Beach & pool
8th-best month of the year

September is one of the better times to visit Coquimbo for general sightseeing.

What to pack for Coquimbo in September

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

In September, Coquimbo sees daytime highs around 18°C and nights near 11°C. Worth packing: sun protection.

sun protection

Sea temperature near Coquimbo in September

The nearest coast averages about 13°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 18°C and coldest in August near 13°C.

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

12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan17Cool
Feb18Cool
Mar17Cool
Apr16Cool
May15Bracing
Jun14Bracing
Jul13Bracing
Aug13Bracing
Sep13Bracing
Oct14Bracing
Nov14Bracing
Dec16Cool

UV index in Coquimbo 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 Coquimbo peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 20UV 14Jun 19UV 4
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr6High
May4Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct11Extreme
Nov12Extreme
Dec13Extreme

Air quality in Coquimbo 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 Coquimbo is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (March, 9 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Coquimbo's WHO annual average of 11.9 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 2216 µg/m³Mar 129 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar9Good
Apr11Good
May13Moderate
Jun15Moderate
Jul16Moderate
Aug16Moderate
Sep14Moderate
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Coquimbo?

Coquimbo sits at 30.0°S, 71.3°W, 22 m above sea level, in Chile. The nearest listed city is La Serena, 10 km away.

CabildoLa Ligua

Topography around Coquimbo

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

Within 3 km, the terrain around Coquimbo has only modest variations in elevation — a maximum elevation change of 143 m around an average of 17 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 744 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,696 m.

The land around Coquimbo is covered by water (54%) and artificial surfaces (30%) within 3 km, water (52%) within 16 km, and water (30%), bare terrain (27%) and grassland (26%) within 80 km.

3 km
143 m
16 km
744 m
80 km
3,696 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: La Serena 10 km · Vicuña 61 km · Ovalle 73 km · Vallenar 163 km · Illapel 188 km · Los Vilos 218 km · Cabildo 277 km · La Ligua 278 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 Coquimbo (-29.9533°, -71.3395°, elevation 22 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).