Verdict: Fair month
Cartagena Weather in September
September runs warm in Cartagena, with daily highs around 30°C (86°F) and nights near 25°C (77°F). It's also the wet side of the calendar: rain falls on about 24 days, so build flexibility into plans. September is workable in Cartagena if your dates are fixed — just plan around the conditions.
Average high
30°C / 86°F
Average low
25°C / 77°F
Rain days
~24
Precipitation
154 mm
What to pack for Cartagena in September
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 24 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Cartagena: Mar (33°C / 91°F) · Coolest: Oct (29°C / 84°F) · Wettest: Jun (~26 rain days)
32°
24°
Jan
32°
24°
Feb
33°
24°
Mar
32°
25°
Apr
31°
25°
May
30°
25°
Jun
31°
25°
Jul
30°
25°
Aug
30°
25°
Sep
29°
25°
Oct
29°
25°
Nov
31°
24°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)