The weather in Hennef in December is very cold with temperatures between 1°C and 6°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Hennef. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Hennef during December. It’s important to get out your snow boots and warm mittens to stay warm while you explore Hennef.
Our weather forecast can give you a great sense of what weather to expect in Hennef in December 2025.
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
6° / 1°
Rainy Days
8
Snowy Days
6
Dry Days
17
Rainfall
67
mm
Sun Hours
6.7
Hrs
