Stellenbosch weather by month
Stellenbosch runs from about 11°C in July to 24°C in January, with July the wettest month at 495 mm.
warmest month
January
24°C
coolest month
July
11°C
wettest month
July
495 mm
worst air month
June
24 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | 24°C | 11 mm | 407 h | 12 |
| February | 22°C | 20 mm | 364 h | 10 |
| March | 21°C | 37 mm | 342 h | 12 |
| April | 18°C | 29 mm | 303 h | 13 |
| May | 16°C | 58 mm | 275 h | 18 |
| June | 14°C | 175 mm | 238 h | 24 |
| July | 11°C | 495 mm | 193 h | 20 |
| August | 11°C | 178 mm | 250 h | 23 |
| September | 13°C | 41 mm | 306 h | 17 |
| October | 18°C | 36 mm | 374 h | 13 |
| November | 19°C | 19 mm | 376 h | 10 |
| December | 21°C | 30 mm | 396 h | 9 |
About 3,824 hours of sun a year. Roughly 95 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.