Cartagena, Colombia weather in September
Temperature, sea and sunshine in September: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in September
Good
Best time to visit: December – March
What is the weather like in Cartagena, Colombia in September?
In September, Cartagena, Colombia is hot: daytime highs average 29 °C, and even at night it stays warm at around 25 °C. The sea averages 29.7 °C – almost as warm as a bath. Expect around 6 hours of sunshine a day. It is the rainy season: rain falls on about 28 days, totalling 206 mm. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, September is a good month for a holiday in Cartagena, Colombia.
September compared
How the weather changes from August to October. Tap a month to open it.
| AugustAug | SeptemberSep | OctoberOct | |
|---|---|---|---|
| Score | 69 | 68 | 69 |
| Day | 30° | 29° | 29° |
| Night | 26° | 25° | 25° |
| Sea | 30° | 30° | 30° |
| Sun | 6 h | 6 h | 6 h |
| Rain days | 28 | 28 | 29 |
More details for September
- Daylight
- 12 h 12 min05:51 – 18:03
- UV index
- 13 · extremeclear sky, noon (estimate)
- Muggy days
- 30 daysdew point 18 °C or more
- Wind
- 15 km/haverage daily peak
- Cloud cover
- 87 %on average
- Hot days
- 6 days30 °C or more
- Time zone
- UTC−5America/Bogota
How the score comes together
- Temperatureweight 35 %100 %
- Seaweight 25 %100 %
- Sunshineweight 20 %42 %
- Few rainy daysweight 20 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in September
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Cartagena, Colombia in September: quick answers
Is Cartagena, Colombia hot in September?
Yes. In September, Cartagena, Colombia is hot: daytime highs average 29 °C and nights stay around 25 °C. On about 6 days the thermometer climbs to 30 °C or more.
Can you swim in Cartagena, Colombia in September?
Yes. In September the sea averages 29.7 °C – almost as warm as a bath.
Does it rain much in Cartagena, Colombia in September?
It rains often – on about 28 days, adding up to 206 mm.
Cartagena, Colombia month by month
The whole year in Cartagena, ColombiaAll destinations: Colombia
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)