SeasonMapSan Andrés weather in September
Colombia
September in San Andrés: sweltering, soaked, with clean air — fine if you can take 25 rainy days.
#7 of 12 months in San Andrés · #866 of 1383 destinations to visit in September · comfort 74/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on San Andrés in September
Other months in San Andrés
San Andrés's forum calls April hot and sunny, though high season with more tourists and higher prices than the quieter shoulder months. Regulars are consistent that the typical pattern is sunny mornings turning to cloud or rain in the afternoon, and flag the island's weather as genuinely hard to forecast given its exposure to El Niño/La Niña swings — March is often cited as the calmer, cheaper alternative with similarly good weather.
Add your own note from San Andrés's card on the map.
San Andrés climate normals — September
| Daytime high | 31°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 37°C / 99°F | |
| Sea temperature | 30°C / 86°F | ♨️ bath-warm |
| Rainfall | 197 mm / 7.8 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 25°C / 77°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.2 h | |
| Wind | 22 km/h / 13 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in San Andrés in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 2 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for San Andrés's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSan Andrés's weather peaks February–April, best around March.
Best weatherFair weatherToughest weather
What's on in San Andrés in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Tourist card required to land
1 Jan – 31 DecEveryone who is not a registered islander buys a tourist card before boarding, Colombians included, and it is checked at the airport door. The price is set each January and it is not optional. Source ↗
- Hazard
Caribbean hurricane season
1 Jun – 30 NovDirect hits are rare but not unheard of here, and the season's real effect is a week of swell, rain and cancelled boats to Providencia. September and October are the months that matter. Source ↗
Nearby, and something's on
Within 300 km of San Andrés — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is San Andrés?
San Andrés in September — FAQ
- Is September a good time to visit San Andrés?
- September in San Andrés: sweltering, soaked, with clean air — fine if you can take 25 rainy days. It ranks #7 of 12 months for San Andrés on SeasonMap's comfort score (74/100).
- What is the weather like in San Andrés in September?
- In September, San Andrés averages a daily high of 31.4°C and a low of 25.9°C, with about 197.2 mm of rain over roughly 24.7 rainy days.
- What is the air quality in San Andrés in September?
- San Andrés has a mean US Air Quality Index of about 39 in September.
Other months in San Andrés
Compare San Andrés in September
Warmer or cooler than San Andrés in September
Similar destinations in South America — September
Within 300 km: Tortuguero's Green turtle nesting on 1 Jul – 31 Oct.