The temperatures in Hennef in August are comfortable with low of 13°C and and high up to 24°C.
You can expect about 3 to 8 days of rain in Hennef during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Hennef in August 2026.
If you’re planning to visit Hennef in the near future, we highly recommend that you review the 14 day weather forecast for Hennef before you arrive.
Temperatures
24° / 13°
Rainy Days
4
Snowy Days
0
Dry Days
27
Rainfall
71
mm
Sun Hours
10.4
Hrs
