Click on a day for an hourly weather forecast
The weather in Grindelwald in September is very cold with temperatures between 2°C and 10°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Grindelwald. 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.
Grindelwald is going to experience quite a number of days of snow during September. 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 Grindelwald in September 2025.
If you’re planning to visit Grindelwald in the near future, we highly recommend that you review the 14 day weather forecast for Grindelwald before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -4° / -13° | 2 | 6 | 23 | 294 mm | Awful | Grindelwald in January |
| February | -4° / -13° | 2 | 5 | 22 | 220 mm | Awful | Grindelwald in February |
| March | -1° / -10° | 4 | 3 | 25 | 275 mm | Awful | Grindelwald in March |
| April | 2° / -6° | 6 | 1 | 26 | 286 mm | Awful | Grindelwald in April |
| May | 5° / -2° | 12 | 1 | 26 | 494 mm | Awful | Grindelwald in May |
| June | 11° / 3° | 20 | 2 | 14 | 480 mm | Awful | Grindelwald in June |
| July | 14° / 5° | 21 | 5 | 6 | 471 mm | Bad | Grindelwald in July |
| August | 14° / 5° | 20 | 5 | 7 | 441 mm | Bad | Grindelwald in August |
| September | 10° / 2° | 14 | 6 | 11 | 257 mm | Awful | Grindelwald in September |
| October | 5° / -3° | 6 | 7 | 18 | 247 mm | Awful | Grindelwald in October |
| November | 0° / -7° | 4 | 6 | 21 | 262 mm | Awful | Grindelwald in November |
| December | -3° / -12° | 2 | 7 | 22 | 270 mm | Awful | Grindelwald in December |