The temperatures in Clanwilliam in September are quite cold with temperatures between 8°C and 20°C, warm clothes are a must.
There is little to no rain in Clanwilliam during September, so it’s a lot easier to explore the city. Just remember to dress in warm layers, as it can still get pretty chilly.
Our weather forecast can give you a great sense of what weather to expect in Clanwilliam in September 2025.
If you’re planning to visit Clanwilliam in the near future, we highly recommend that you review the 14 day weather forecast for Clanwilliam before you arrive.
Temperatures
20° / 8°
Rainy Days
0
Snowy Days
0
Dry Days
30
Rainfall
9
mm
Sun Hours
9.9
Hrs