Roatán weather in September
September in Roatán: sweltering, rainy, with clean air — a great time to visit.
#8 of 12 months in Roatán · #327 of 604 destinations to visit in September · comfort 79/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Roatán climate normals — September
| Daytime high | 29°C / 84°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 27°C / 81°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 97 mm / 3.8 in | 🌧 rainy |
| Rainy days | 18 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 11 h/day | |
| Daylight | 12.2 h | |
| Wind | 26 km/h / 16 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Roatán in September — FAQ
- Is September a good time to visit Roatán?
- September in Roatán: sweltering, rainy, with clean air — a great time to visit. It ranks #8 of 12 months for Roatán on SeasonMap's comfort score (79/100).
- What is the weather like in Roatán in September?
- In September, Roatán averages a daily high of 28.8°C and a low of 27.4°C, with about 97 mm of rain over roughly 18.4 rainy days.
- What is the air quality in Roatán in September?
- Roatán has a mean US Air Quality Index of about 31 in September.