Click on a day for an hourly weather forecast
The temperatures in Lermoos in September are quite cold with temperatures between 6°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Lermoos. 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.
You can expect a few days of snow in Lermoos during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Lermoos.
Our weather forecast can give you a great sense of what weather to expect in Lermoos in September 2025.
If you’re planning to visit Lermoos in the near future, we highly recommend that you review the 14 day weather forecast for Lermoos before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -8° | 4 | 6 | 21 | 207 mm | Awful | Lermoos in January |
| February | 0° / -8° | 5 | 4 | 22 | 142 mm | Awful | Lermoos in February |
| March | 4° / -5° | 6 | 5 | 22 | 179 mm | Awful | Lermoos in March |
| April | 9° / -1° | 10 | 4 | 19 | 173 mm | Awful | Lermoos in April |
| May | 13° / 3° | 18 | 4 | 13 | 367 mm | Awful | Lermoos in May |
| June | 17° / 7° | 19 | 9 | 3 | 459 mm | Bad | Lermoos in June |
| July | 19° / 8° | 19 | 11 | 1 | 382 mm | Ok | Lermoos in July |
| August | 19° / 9° | 16 | 14 | 1 | 399 mm | Ok | Lermoos in August |
| September | 16° / 6° | 13 | 12 | 5 | 230 mm | Bad | Lermoos in September |
| October | 11° / 2° | 8 | 11 | 12 | 210 mm | Awful | Lermoos in October |
| November | 6° / -2° | 6 | 9 | 15 | 138 mm | Awful | Lermoos in November |
| December | 1° / -6° | 5 | 6 | 21 | 180 mm | Awful | Lermoos in December |