San Salvador weather by month
San Salvador runs from about 22°C in November to 26°C in March, with June the wettest month at 601 mm.
warmest month
March
26°C
coolest month
November
22°C
wettest month
June
601 mm
worst air month
May
23 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 24°C | 2 mm | 349 h | 9 |
| February | 24°C | 1 mm | 335 h | 12 |
| March | 26°C | 15 mm | 368 h | 14 |
| April | 25°C | 84 mm | 351 h | 17 |
| May | 25°C | 144 mm | 349 h | 23 |
| June | 23°C | 601 mm | 191 h | 14 |
| July | 24°C | 242 mm | 310 h | 17 |
| August | 24°C | 240 mm | 344 h | 17 |
| September | 23°C | 284 mm | 274 h | 15 |
| October | 23°C | 153 mm | 311 h | 14 |
| November | 22°C | 209 mm | 265 h | 13 |
| December | 24°C | 32 mm | 316 h | 12 |
About 3,763 hours of sun a year. Roughly 169 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.