Knysna weather by month
Knysna runs from about 12°C in July to 21°C in February, with April the wettest month at 162 mm.
warmest month
February
21°C
coolest month
July
12°C
wettest month
April
162 mm
worst air month
January
8 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 20°C | 37 mm | 345 h | 8 |
| February | 21°C | 52 mm | 337 h | 8 |
| March | 20°C | 30 mm | 307 h | 8 |
| April | 17°C | 162 mm | 263 h | 4 |
| May | 16°C | 18 mm | 277 h | 5 |
| June | 15°C | 120 mm | 230 h | 5 |
| July | 12°C | 39 mm | 236 h | 5 |
| August | 13°C | 35 mm | 290 h | 6 |
| September | 14°C | 84 mm | 287 h | 6 |
| October | 17°C | 125 mm | 334 h | 7 |
| November | 17°C | 87 mm | 343 h | 7 |
| December | 20°C | 24 mm | 391 h | 7 |
About 3,640 hours of sun a year. Roughly 82 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.