San Andres weather by month
San Andres runs from about 27°C in February to 29°C in May, with October the wettest month at 430 mm.
warmest month
May
29°C
coolest month
February
27°C
wettest month
October
430 mm
worst air month
May
15 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 28°C | 46 mm | 340 h | 8 |
| February | 27°C | 27 mm | 315 h | 10 |
| March | 28°C | 15 mm | 349 h | 9 |
| April | 28°C | 31 mm | 350 h | 8 |
| May | 29°C | 147 mm | 336 h | 15 |
| June | 28°C | 260 mm | 262 h | 13 |
| July | 28°C | 362 mm | 264 h | 14 |
| August | 28°C | 214 mm | 324 h | 11 |
| September | 28°C | 423 mm | 247 h | 7 |
| October | 28°C | 430 mm | 252 h | 5 |
| November | 27°C | 313 mm | 277 h | 8 |
| December | 28°C | 311 mm | 267 h | 9 |
About 3,583 hours of sun a year. Roughly 225 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 2026-05-25. Full method, licences and the list of sources we rejected are on the methodology page.