Click on a day for an hourly weather forecast
The weather in Hennef in January 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 January 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.
Hennef is going to experience quite a number of days of snow during January. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Hennef in January 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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 4° / -1° | 9 | 13 | 9 | 61 mm | Awful | Hennef in January |
| February | 6° / 0° | 7 | 15 | 6 | 46 mm | Awful | Hennef in February |
| March | 11° / 2° | 6 | 23 | 2 | 51 mm | Bad | Hennef in March |
| April | 15° / 5° | 4 | 24 | 1 | 43 mm | Good | Hennef in April |
| May | 18° / 7° | 6 | 25 | 0 | 79 mm | Good | Hennef in May |
| June | 22° / 11° | 6 | 25 | 0 | 75 mm | Good | Hennef in June |
| July | 24° / 13° | 5 | 26 | 0 | 79 mm | Perfect | Hennef in July |
| August | 24° / 13° | 4 | 27 | 0 | 71 mm | Perfect | Hennef in August |
| September | 21° / 10° | 4 | 26 | 0 | 46 mm | Good | Hennef in September |
| October | 15° / 6° | 5 | 26 | 0 | 53 mm | Good | Hennef in October |
| November | 10° / 4° | 7 | 22 | 1 | 53 mm | Bad | Hennef in November |
| December | 6° / 1° | 8 | 17 | 6 | 67 mm | Awful | Hennef in December |