Caye Caulker weather by month
Caye Caulker runs from about 26°C in February to 29°C in September, with October the wettest month at 561 mm.
warmest month
September
29°C
coolest month
February
26°C
wettest month
October
561 mm
worst air month
June
14 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 26°C | 84 mm | 319 h | 6 |
| February | 26°C | 23 mm | 314 h | 7 |
| March | 27°C | 9 mm | 365 h | 8 |
| April | 28°C | 28 mm | 352 h | 8 |
| May | 29°C | 3 mm | 370 h | 11 |
| June | 29°C | 318 mm | 264 h | 14 |
| July | 29°C | 236 mm | 325 h | 12 |
| August | 29°C | 201 mm | 335 h | 8 |
| September | 29°C | 181 mm | 332 h | 5 |
| October | 27°C | 561 mm | 256 h | 5 |
| November | 27°C | 270 mm | 301 h | 5 |
| December | 26°C | 191 mm | 277 h | 5 |
About 3,810 hours of sun a year. Roughly 182 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 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.