Click on a day for an hourly weather forecast
The temperatures in Vernier in September are quite cold with temperatures between 8°C and 21°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Vernier during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Vernier in September 2025.
If you’re planning to visit Vernier in the near future, we highly recommend that you review the 14 day weather forecast for Vernier before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / -4° | 9 | 12 | 10 | 176 mm | Awful | Vernier in January |
| February | 6° / -4° | 9 | 11 | 9 | 132 mm | Awful | Vernier in February |
| March | 11° / -1° | 8 | 18 | 5 | 132 mm | Awful | Vernier in March |
| April | 15° / 3° | 7 | 22 | 2 | 117 mm | Bad | Vernier in April |
| May | 18° / 5° | 10 | 21 | 0 | 194 mm | Ok | Vernier in May |
| June | 23° / 9° | 10 | 20 | 0 | 190 mm | Good | Vernier in June |
| July | 25° / 11° | 10 | 21 | 0 | 171 mm | Good | Vernier in July |
| August | 25° / 11° | 8 | 23 | 0 | 149 mm | Good | Vernier in August |
| September | 21° / 8° | 6 | 24 | 0 | 116 mm | Good | Vernier in September |
| October | 17° / 4° | 6 | 25 | 0 | 118 mm | Good | Vernier in October |
| November | 11° / 1° | 6 | 20 | 4 | 155 mm | Bad | Vernier in November |
| December | 6° / -2° | 8 | 15 | 7 | 214 mm | Awful | Vernier in December |