The temperatures in Fort William in September are quite cold with temperatures between 7°C and 11°C, warm clothes are a must.
You can expect rain for roughly half of the month of September 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.
Please note that Fort William can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Fort William in September 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.
Temperatures
11° / 7°
Rainy Days
11
Snowy Days
1
Dry Days
19
Rainfall
120
mm
Sun Hours
4.5
Hrs
