Blantyre weather by month
Blantyre runs from about 18°C in June to 25°C in December, with January the wettest month at 203 mm.
warmest month
December
25°C
coolest month
June
18°C
wettest month
January
203 mm
worst air month
September
21 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 22°C | 203 mm | 315 h | 9 |
| February | 23°C | 57 mm | 309 h | 8 |
| March | 23°C | 77 mm | 324 h | 6 |
| April | 21°C | 24 mm | 312 h | 9 |
| May | 19°C | 19 mm | 326 h | 9 |
| June | 18°C | 11 mm | 293 h | 13 |
| July | 19°C | 1 mm | 338 h | 10 |
| August | 20°C | 9 mm | 339 h | 13 |
| September | 23°C | 7 mm | 328 h | 21 |
| October | 23°C | 38 mm | 327 h | 14 |
| November | 24°C | 158 mm | 357 h | 10 |
| December | 25°C | 122 mm | 374 h | 8 |
About 3,942 hours of sun a year. Roughly 73 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.