Port Louis weather by month
Port Louis runs from about 22°C in August to 27°C in January, with January the wettest month at 316 mm.
warmest month
January
27°C
coolest month
August
22°C
wettest month
January
316 mm
worst air month
June
7 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 27°C | 316 mm | 327 h | 6 |
| February | 27°C | 103 mm | 339 h | 6 |
| March | 27°C | 104 mm | 328 h | 5 |
| April | 26°C | 64 mm | 313 h | 5 |
| May | 25°C | 29 mm | 289 h | 6 |
| June | 23°C | 18 mm | 285 h | 7 |
| July | 22°C | 12 mm | 321 h | 6 |
| August | 22°C | 11 mm | 339 h | 6 |
| September | 23°C | 9 mm | 349 h | 6 |
| October | 24°C | 78 mm | 354 h | 7 |
| November | 26°C | 57 mm | 360 h | 7 |
| December | 27°C | 70 mm | 389 h | 6 |
About 3,993 hours of sun a year. Roughly 85 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.