Click on a day for an hourly weather forecast
The weather in Siegen in January is very cold with temperatures between -2°C and 2°C, warm clothes are a must.
You can expect rain for roughly half of the month of January 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 January. 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 January 2026.
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -2° | 9 | 5 | 19 | 115 mm | Awful | Siegen in January |
| February | 4° / -2° | 7 | 7 | 16 | 88 mm | Awful | Siegen in February |
| March | 9° / 0° | 8 | 13 | 10 | 79 mm | Awful | Siegen in March |
| April | 14° / 3° | 6 | 20 | 4 | 66 mm | Ok | Siegen in April |
| May | 17° / 6° | 7 | 23 | 1 | 109 mm | Ok | Siegen in May |
| June | 21° / 10° | 7 | 23 | 0 | 103 mm | Ok | Siegen in June |
| July | 23° / 12° | 7 | 24 | 0 | 119 mm | Good | Siegen in July |
| August | 23° / 12° | 5 | 26 | 0 | 100 mm | Perfect | Siegen in August |
| September | 19° / 9° | 5 | 25 | 0 | 69 mm | Good | Siegen in September |
| October | 13° / 5° | 7 | 23 | 1 | 78 mm | Bad | Siegen in October |
| November | 8° / 2° | 8 | 15 | 6 | 88 mm | Awful | Siegen in November |
| December | 4° / -1° | 10 | 7 | 16 | 127 mm | Awful | Siegen in December |