Cancún weather by month
Cancún runs from about 23°C in February to 29°C in May, with June the wettest month at 481 mm.
warmest month
May
29°C
coolest month
February
23°C
wettest month
June
481 mm
worst air month
June
15 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 25°C | 70 mm | 291 h | 7 |
| February | 23°C | 17 mm | 300 h | 8 |
| March | 26°C | 32 mm | 360 h | 8 |
| April | 27°C | 40 mm | 352 h | 8 |
| May | 29°C | 6 mm | 392 h | 12 |
| June | 28°C | 481 mm | 256 h | 15 |
| July | 28°C | 201 mm | 346 h | 10 |
| August | 28°C | 150 mm | 349 h | 8 |
| September | 28°C | 381 mm | 314 h | 6 |
| October | 27°C | 249 mm | 272 h | 5 |
| November | 26°C | 122 mm | 316 h | 7 |
| December | 24°C | 101 mm | 290 h | 6 |
About 3,838 hours of sun a year. Roughly 159 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.