Click on a day for an hourly weather forecast
The temperatures in Fort William in August are quite cold with temperatures between 8°C and 12°C, warm clothes are a must.
You can expect rain for roughly half of the month of August in Fort William. 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.
Our weather forecast can give you a great sense of what weather to expect in Fort William in August 2025.
If you’re planning to visit Fort William in the near future, we highly recommend that you review the 14 day weather forecast for Fort William before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 3° / -1° | 10 | 2 | 24 | 163 mm | Awful | Fort William in January |
| February | 2° / -1° | 8 | 2 | 21 | 155 mm | Awful | Fort William in February |
| March | 4° / 0° | 6 | 4 | 21 | 132 mm | Awful | Fort William in March |
| April | 7° / 2° | 8 | 8 | 15 | 80 mm | Awful | Fort William in April |
| May | 9° / 4° | 12 | 9 | 11 | 104 mm | Awful | Fort William in May |
| June | 12° / 7° | 8 | 20 | 2 | 92 mm | Awful | Fort William in June |
| July | 13° / 8° | 9 | 22 | 0 | 113 mm | Bad | Fort William in July |
| August | 12° / 8° | 10 | 21 | 0 | 129 mm | Bad | Fort William in August |
| September | 11° / 7° | 11 | 19 | 1 | 120 mm | Bad | Fort William in September |
| October | 8° / 4° | 15 | 11 | 7 | 166 mm | Awful | Fort William in October |
| November | 5° / 2° | 12 | 4 | 18 | 152 mm | Awful | Fort William in November |
| December | 4° / 0° | 11 | 3 | 21 | 172 mm | Awful | Fort William in December |