Cartagena weather in September

In September, Cartagena sees average daytime highs of 15°C and overnight lows near 8°C, with 28 mm of rain across 3 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 15°C through the month. The sky is clear or mostly clear about 47% 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 Cartagena's 8th-clearest and 5th-windiest month. For the whole year in context, see Cartagena's year-round climate.

Daytime high
15°
9th warmest
Overnight low
4th coldest
Rainfall
28 mm
3 wet days
Daylight
11 h 48 min
7:47 AM – 7:35 PM
Cloud cover
48%
8th clearest
Wind
11 km/h
5th windiest
Solar energy
5.2 kWh/m²
Travel score
5.5
out of 10

Cartagena is place in Chile.

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 15°C through the month.

A typical September day in Cartagena reaches about 15°C in the afternoon and slips back to 8°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°151015202530
Avg high (°C)Avg low (°C)
1158
2158
3158
4158
5158
6158
7158
8158
9158
10158
11158
12158
13158
14158
15158
16158
17158
18159
19159
20159
21159
22159
23169
24169
25169
26169
27169
28169
29169
30169

Cartagena 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 daysDaylight (hours)Travel score
Jan21° / 14°00.1148.8
Feb21° / 14°20.313.28.7
Mar20° / 12°40.712.38.4
Apr18° / 10°182.211.27.2
May16° / 614.710.35.5
Jun14° / 12279.84.3
Jul13° / 675.5104.2
Aug14° / 595.110.84.6
Sep15° / 28311.85.5
Oct17° / 10°141.812.86.7
Nov18° / 11°40.713.77.9
Dec20° / 12°30.414.28.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 47% 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 40%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25644
35644
45743
55842
65842
75941
85941
96040
106040
116040
126139
136238
146238
156238
166238
176238
186238
196139
206139
216139
226139
236139
246139
256139
266139
276139
286139
296139
306238

Chance of precipitation in September

Any precipitation

Cartagena gets around 28 mm of rain over 3 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 10% and peaks near 15% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
115
215
314
414
514
613
713
813
912
1012
1112
1211
1311
1410
1510
169
179
188
198
208
218
227
237
247
257
267
277
288
298
308

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 (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 8:08 AM to 7:27 AM, and sunset from 7:24 PM to 7:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.38:087:24
211.38:077:25
311.38:057:26
411.48:047:26
511.48:037:27
611.48:017:28
711.58:007:28
811.57:587:29
911.57:577:30
1011.67:567:30
1111.67:547:31
1211.77:537:32
1311.77:517:33
1411.77:507:33
1511.87:487:34
1611.87:477:35
1711.87:457:35
1811.97:447:36
1911.97:437:37
2011.97:417:37
2112.07:407:38
2212.07:387:39
2312.07:377:40
2412.17:357:40
2512.17:347:41
2612.27:337:42
2712.27:317:42
2812.27:307:43
2912.37:287:44
3012.37:277:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.2 kWh/m².

For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 8.96 kWh/m² in December across the year — September's 5.2 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.5Bright
34.5Bright
44.5Bright
54.6Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.9Bright
115.0Bright
125.0Bright
135.1Bright
145.1Bright
155.2Bright
165.3Bright
175.3Bright
185.4Bright
195.4Bright
205.5Bright
215.5Bright
225.6Bright
235.6Bright
245.7Bright
255.7Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
306.0Bright
Planning a trip in September

Is September a good time to visit Cartagena?

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

5.5
Sightseeing
8th-best month of the year
0.2
Beach & pool
9th-best month of the year

September is a reasonable time to visit Cartagena for sightseeing.

What to pack for Cartagena in September

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

In September, Cartagena sees daytime highs around 15°C and nights near 8°C. Worth packing: a warm layer and sun protection. About 3 days see rain.

a warm layersun protection

Sea temperature near Cartagena in September

The nearest coast averages about 12°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 16°C and coldest in August near 12°C.

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

10°12°14°16°18°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr14Bracing
May14Bracing
Jun13Bracing
Jul13Bracing
Aug12Bracing
Sep12Bracing
Oct13Bracing
Nov13Bracing
Dec15Bracing

UV index in Cartagena in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cartagena peaks around January 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeModerateHighVery highExtremeJan 17UV 13Jun 19UV 3
UV index (midday)Level
Jan14Extreme
Feb12Extreme
Mar10Very high
Apr5High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct9Very high
Nov11Extreme
Dec12Extreme

Air quality in Cartagena 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 Cartagena is worst in July — around 88 µg/m³ PM2.5 (unhealthy), about 2.5× the cleanest month (February, 35 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorJul 1287 µg/m³Feb 1836 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb35Moderate
Mar40Poor
Apr58Unhealthy
May83Unhealthy
Jun85Unhealthy
Jul88Unhealthy
Aug77Unhealthy
Sep64Unhealthy
Oct45Poor
Nov37Poor
Dec38Poor
Location & terrain

Where is Cartagena?

Cartagena sits at 33.6°S, 71.6°W, 82 m above sea level, in Chile. The nearest listed city is San Antonio, 5.0 km away.

Topography around Cartagena

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

Within 3 km, the terrain around Cartagena has only modest variations in elevation — a maximum elevation change of 202 m around an average of 57 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 488 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,259 m.

The land around Cartagena is covered by water (35%) and artificial surfaces (28%) within 3 km, water (39%), grassland (25%) and trees (20%) within 16 km, and water (30%) and grassland (21%) within 80 km.

3 km
202 m
16 km
488 m
80 km
2,259 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San Antonio 5.0 km · El Quisco 19 km · Casablanca 32 km · Melipilla 39 km · Curacaví 48 km · Placilla 49 km · Valparaiso 58 km · Quilpué 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 Cartagena (-33.5538°, -71.6076°, elevation 82 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).