Colombia
Cartagena in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Cartagena in September is climatically mixed. The average daily high is around 29 °C, and the sea is about 30 °C. With about 26 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
53/100 · #9
Warmth
#10
Dryness
#11
Sun
#9
Sea warmth
#1
Published best categories: none
Cartagena · SeptemberPhoto: Bernard Gagnon · CC BY-SA 4.0Climate facts
- Average high
- 29 °C
- Average low
- 27 °C
- Sea
- 30 °C
- Rainy days (est.)
- 26 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 30 | 27 | 24 | 168 | 6.8 | 82 | 3.5 | 30 | 52 |
| September (selected) | 29 | 27 | 26 | 179 | 6.4 | 82 | 3.0 | 30 | 53 |
| October | 29 | 27 | 27 | 228 | 5.9 | 82 | 3.2 | 29 | 54 |
How do the previous and next months compare?
Baseline: September (53/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -1 | +0.5 °C | ±0 °C | -2.1 | -11.1 mm | +0.4 h | -0.4 % | +0.4 m/s | ±0 °C |
| October | +1 | -0.4 °C | -0.1 °C | +0.2 | +48.5 mm | -0.5 h | +0.1 % | +0.1 m/s | -0.1 °C |
All twelve months in context
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Where to stay in Cartagena
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Useful next decisions
Frequently asked questions
How warm is Cartagena in September?
The average daily high is around 29 °C, with an average daily low of about 27 °C.
Can you swim in Cartagena in September?
The sea is about 30 °C (very warm).
Does it rain a lot in Cartagena in September?
The curated estimate is about 26 rainy days per month, not a directly measured long-term average. Total precipitation averages around 179 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Cartagena?
By the climate score, January, February, March and December are the strongest months for Cartagena. For a beach trip: January, February, March and December. September is not among them.