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The weather in Wengen in September is very cold with temperatures between 2°C and 14°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Wengen. 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.
Please note that Wengen can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Wengen in September 2026.
If you’re planning to visit Wengen in the near future, we highly recommend that you review the 14 day weather forecast for Wengen before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -13° | 4 | 7 | 20 | 129 mm | Awful | Wengen in January |
| February | -1° / -13° | 3 | 6 | 20 | 97 mm | Awful | Wengen in February |
| March | 2° / -10° | 8 | 6 | 19 | 125 mm | Awful | Wengen in March |
| April | 5° / -5° | 11 | 8 | 11 | 138 mm | Awful | Wengen in April |
| May | 9° / -2° | 18 | 6 | 7 | 241 mm | Awful | Wengen in May |
| June | 15° / 3° | 19 | 11 | 0 | 247 mm | Ok | Wengen in June |
| July | 17° / 5° | 17 | 14 | 0 | 237 mm | Ok | Wengen in July |
| August | 17° / 5° | 16 | 15 | 0 | 239 mm | Ok | Wengen in August |
| September | 14° / 2° | 11 | 17 | 1 | 140 mm | Ok | Wengen in September |
| October | 8° / -3° | 7 | 18 | 6 | 133 mm | Awful | Wengen in October |
| November | 4° / -7° | 5 | 12 | 13 | 118 mm | Awful | Wengen in November |
| December | -1° / -12° | 4 | 8 | 19 | 117 mm | Awful | Wengen in December |