Roatán weather by month
Roatán runs from about 25°C in February to 29°C in September, with November the wettest month at 414 mm.
warmest month
September
29°C
coolest month
February
25°C
wettest month
November
414 mm
worst air month
July
11 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 81 mm | 301 h | 6 |
| February | 25°C | 37 mm | 315 h | 8 |
| March | 27°C | 24 mm | 360 h | 8 |
| April | 27°C | 51 mm | 355 h | 7 |
| May | 29°C | 0 mm | 381 h | 10 |
| June | 29°C | 90 mm | 307 h | 11 |
| July | 28°C | 98 mm | 349 h | 11 |
| August | 28°C | 174 mm | 354 h | 8 |
| September | 29°C | 166 mm | 321 h | 5 |
| October | 27°C | 370 mm | 279 h | 4 |
| November | 27°C | 414 mm | 280 h | 5 |
| December | 25°C | 377 mm | 263 h | 5 |
About 3,865 hours of sun a year. Roughly 162 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-23. Full method, licences and the list of sources we rejected are on the methodology page.