expatwhy.

Sur weather by month

Sur runs from about 23°C in February to 36°C in July, with October the wettest month at 85 mm.

warmest month

July

36°C

coolest month

February

23°C

wettest month

October

85 mm

worst air month

February

21 µg/m³

The whole year, month by month.

Monthly climate normals for Sur
MonthAvg tempRainSunPM2.5
January23°C6 mm314 h19
February23°C22 mm294 h21
March25°C22 mm339 h15
April28°C77 mm315 h19
May34°C8 mm359 h18
June36°C0 mm337 h19
July36°C0 mm306 h21
August32°C0 mm331 h21
September31°C6 mm347 h14
October29°C85 mm324 h17
November27°C2 mm315 h17
December23°C0 mm309 h15

About 3,890 hours of sun a year. Roughly 24 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.