Colombia Cartagena Weather in September — Climate Guide
September in Cartagena is moderate
Cartagena Weather in September — Quick Answer
As of 2026- Avg temp
- 31° / 25°
- Rainfall
- 130mm · 12 days
- Crowds
- Quiet
As of 2026, Cartagena in September averages a high of 31°C and low of 25°C with 130mm of rain over about 12 days. Hot, humid, and rainy — around 31°C/25°C (88°F/77°F), the wettest stretch. Light, quick-drying clothing, a reliable rain jacket and umbrella, sun hat, sunglasses, SPF 50+, and water. Swimwear for the warm sea between showers.
September is moderate for Cartagena.
September is one of the wettest months — around 31°C/25°C (88°F/77°F), very humid, with frequent and often heavy rain (about 130mm). Storms can roll in beyond just the afternoons, though sunny mornings still happen.
With no major festival and the fewest visitors, this is the cheapest, quietest time to come — empty plazas, easy hotel deals, and short or no queues at the sights.
Travel score
Cartagena September Weather Stats
Avg High
31°C
Avg Low
25°C
Rainy Days
12
130mm total
Sunshine
6h
Daily avg
Humidity
81%
very humid
UV Index
11
Extreme
Wind
12 km/h
Gusts 24
Sea Temp
29°C
Avg water temp
Crowds
Quiet
At attractions
September Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
27 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
38°C
Nighttime
27°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 24 km/h
Activities Recommended for September
September Travel Pros & Cons
Pros
- Lowest prices of the year
- Thinnest crowds, short queues
- Warm, swimmable sea
- Sunny mornings still common
Cons
- Wettest stretch of the year
- Boat trips often disrupted
- High humidity
- Fewer guaranteed sunny days
September Events & Festivals
- Among the wettest months — frequent storms
- Lowest prices and thinnest crowds
- Warm sea, still swimmable between showers
- Sunny mornings still common
Cartagena in September — Full Picture
September is one of the wettest months — around 31°C/25°C (88°F/77°F), very humid, with frequent and often heavy rain (about 130mm). Storms can roll in beyond just the afternoons, though sunny mornings still happen.
With no major festival and the fewest visitors, this is the cheapest, quietest time to come — empty plazas, easy hotel deals, and short or no queues at the sights.
If you're flexible and happy to dodge showers, you can still enjoy the Old City, the fort, and the warm sea, especially in the mornings. It rewards travelers who prioritize value and quiet over guaranteed sun.
Note: boat trips to the islands are most likely to be disrupted now, so build slack into your plans and have indoor backups. Carry solid rain gear and confirm strong air conditioning at your accommodation.
What to Wear & What to Pack
Hot, humid, and rainy — around 31°C/25°C (88°F/77°F), the wettest stretch. Light, quick-drying clothing, a reliable rain jacket and umbrella, sun hat, sunglasses, SPF 50+, and water. Swimwear for the warm sea between showers.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
31.7°C
24.7°C
4.7/mo
Summer (Jun·Jul·Aug)
32°C
25°C
8.3/mo
Autumn (Sep·Oct·Nov)
Current31°C
25°C
12.3/mo
Winter (Dec·Jan·Feb)
31°C
24°C
1.3/mo
Cartagena Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 31° | 24° | 1d·2mm | 9h | 78% | 11 | Very busy | Peak |
| February (Best) | 31° | 24° | 0d·1mm | 9h | 77% | 11 | Busy | Peak |
| March (Best) | 31° | 24° | 1d·3mm | 9h | 77% | 12 | Busy | Peak |
| April (Best) | 32° | 25° | 4d·25mm | 8h | 78% | 12 | Moderate | Shoulder |
| 32° | 25° | 9d·95mm | 7h | 80% | 11 | Moderate | Shoulder | |
| 32° | 25° | 8d·80mm | 7h | 79% | 11 | Moderate | Shoulder | |
| 32° | 25° | 7d·65mm | 8h | 78% | 11 | Busy | Shoulder | |
| 32° | 25° | 10d·110mm | 7h | 80% | 11 | Moderate | Shoulder | |
| 31° | 25° | 12d·130mm | 6h | 81% | 11 | Quiet | Low season | |
| 31° | 25° | 13d·140mm | 6h | 82% | 10 | Quiet | Low season | |
| 31° | 25° | 12d·130mm | 6h | 81% | 10 | Moderate | Shoulder | |
| December (Best) | 31° | 24° | 3d·15mm | 8h | 79% | 11 | Very busy | Peak |
View Other Months
Cartagena September Hotel Picks
Frequently Asked Questions
Is September a good time to visit Cartagena?
Cartagena in September is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Cartagena in September?
Cartagena September averages a high of 31°C and a low of 25°C.
Does it rain much in Cartagena in September?
Cartagena September averages 130mm of rainfall over about 12 rainy days.
What should I wear in Cartagena in September?
Hot, humid, and rainy — around 31°C/25°C (88°F/77°F), the wettest stretch. Light, quick-drying clothing, a reliable rain jacket and umbrella, sun hat, sunglasses, SPF 50+, and water. Swimwear for the warm sea between showers.
What time are sunrise and sunset in Cartagena in September?
Cartagena September sunrise is 05:55 and sunset is 17:55, with 12h 00min of daylight.
What's the air quality like in Cartagena in September?
Cartagena September air quality (AQI) averages 39, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Cartagena in September?
In September, Cartagena is great for Quiet Old City walks (mornings), Castillo San Felipe early, Indoor sights on rainy afternoons.
Is September peak season in Cartagena?
Cartagena September crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit Cartagena
View Other Months
Planning a September trip to Cartagena?
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Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.