The weather in Siegen in December is very cold with temperatures between -1°C and 4°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Siegen. 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.
Let it snow! You can expect Siegen to be covered in white during the month of December. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Siegen in December 2025.
If you’re planning to visit Siegen in the near future, we highly recommend that you review the 14 day weather forecast for Siegen before you arrive.
