San Jose del Cabo weather by month
San Jose del Cabo runs from about 20°C in January to 31°C in July, with September the wettest month at 82 mm.
warmest month
July
31°C
coolest month
January
20°C
wettest month
September
82 mm
worst air month
June
10 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 20°C | 0 mm | 314 h | 5 |
| February | 20°C | 3 mm | 280 h | 6 |
| March | 21°C | 1 mm | 343 h | 7 |
| April | 23°C | 0 mm | 354 h | 6 |
| May | 27°C | 0 mm | 384 h | 8 |
| June | 28°C | 3 mm | 381 h | 10 |
| July | 31°C | 11 mm | 398 h | 7 |
| August | 31°C | 7 mm | 382 h | 7 |
| September | 29°C | 82 mm | 328 h | 5 |
| October | 29°C | 0 mm | 353 h | 5 |
| November | 23°C | 0 mm | 313 h | 5 |
| December | 21°C | 1 mm | 307 h | 5 |
About 4,137 hours of sun a year. Roughly 10 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.