Click on a day for an hourly weather forecast
The temperatures in Roundstone in September are usually low and can range between 10°C and 14°C.
You can expect about 3 to 8 days of rain in Roundstone 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 Roundstone in September 2025.
If you’re planning to visit Roundstone in the near future, we highly recommend that you review the 14 day weather forecast for Roundstone before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 7° / 4° | 12 | 13 | 6 | 128 mm | Awful | Roundstone in January |
| February | 7° / 3° | 12 | 9 | 8 | 122 mm | Awful | Roundstone in February |
| March | 8° / 4° | 11 | 15 | 6 | 96 mm | Awful | Roundstone in March |
| April | 10° / 5° | 7 | 21 | 2 | 67 mm | Awful | Roundstone in April |
| May | 12° / 7° | 7 | 24 | 0 | 95 mm | Bad | Roundstone in May |
| June | 14° / 10° | 7 | 23 | 0 | 94 mm | Ok | Roundstone in June |
| July | 16° / 11° | 8 | 23 | 0 | 102 mm | Ok | Roundstone in July |
| August | 15° / 11° | 8 | 23 | 0 | 121 mm | Ok | Roundstone in August |
| September | 14° / 10° | 7 | 23 | 0 | 93 mm | Ok | Roundstone in September |
| October | 11° / 8° | 9 | 22 | 0 | 120 mm | Bad | Roundstone in October |
| November | 8° / 6° | 10 | 18 | 2 | 125 mm | Awful | Roundstone in November |
| December | 7° / 4° | 12 | 15 | 4 | 133 mm | Awful | Roundstone in December |