Early autumn · Weather & things to do
Fort William in September
Fort William cools off: highs slip to 59°F (15°C), from 63°F in August, with lows of 49°F (10°C) and about 6.0 in (152 mm) of rain.
It scores 61/100 for comfort, 5th of 12, which makes it a solid shoulder-season month.
- Avg high
- 59°F (15°C)
- Avg low
- 49°F (10°C)
- Rain
- 6.0 in (152 mm)
- Humidity
- 92%
- Cloud cover
- 79%
- Daylight
- ~12 h 27 min
- Comfort score
- 61/100 · Good
What September feels like
Expect mild afternoons around 59°F (15°C), good for long walks.
After dark, temperatures fall to about 49°F (10°C).
Rain is a real factor, with about 6.0 in (152 mm) across the month.
Skies are often grey, with average cloud cover around 79%.
Plan around September
September is shoulder season: good weather, a step below the best months (June – August).
- Comfort slips from 65/100 in August to 61/100.
- September sits inside the May – Sep window our Scotland’s Highland Rail Line route recommends.
What to pack for September
- A warm layer for eveningslows near 49°F
- Rain jacket and waterproof shoesfrequent rain
- Comfortable walking shoesmost picks involve some walking
What to do in Fort William in September
With conditions on your side, the picks below favor time outside.
Ben Nevis Mountain Path
The main route up Britain's highest peak, 7–9 hours round trip.
Why now Our curated notes say it's best Jun–Sep.
Jacobite Steam Train
Steam train on the West Highland Line from Fort William to Mallaig over Glenfinnan.
Why now Our curated notes say it's best Apr–Oct.
Ben Nevis Inn
Converted stone barn at the Achintee start of the Ben Nevis path, with real ales, hearty food and glen views.
Glenfinnan Monument
Tower where Bonnie Prince Charlie raised his standard in 1745, on Loch Shiel.
Glenfinnan Viaduct
Curved 21-arch railway viaduct above Loch Shiel.
Nearby in September
- Aviemore & the Cairngorms in September~55 mi · highs 57°F, 4.1 in rain · 1°C (2°F) cooler by day, drier
- Inverness in September~56 mi · highs 60°F, 3.0 in rain · similar daytime temperatures, drier
- Edinburgh in September~95 mi · highs 60°F, 2.5 in rain · similar daytime temperatures, drier
- Dublin in September~244 mi · highs 61°F, 3.0 in rain · 1°C (3°F) warmer by day, drier
NASA POWER 2001–2025 monthly averages on a ~50 km grid, temperatures adjusted from the grid cell's ~382 m to Fort William's ~9 m elevation (standard lapse rate). Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Fort William in September: quick answers
Is September a good time to visit Fort William?
It's a good shoulder-season choice, scoring 61/100 against a best of 69 in June – August. Expect highs of 59°F (15°C) and 6.0 in (152 mm) of rain. September is inside the May – Sep window our Scotland’s Highland Rail Line route recommends.
How cold is Fort William in September?
Average highs are 59°F (15°C) and average lows 49°F (10°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Fort William in September?
Yes: about 6.0 in (152 mm) of rain falls across September on average, the 6th-wettest month of the year. The annual total is about 71.5 in (1815 mm).
What should I pack for Fort William in September?
Bring a warm layer for evenings (lows near 49°F), rain jacket and waterproof shoes (frequent rain) and comfortable walking shoes (most picks involve some walking).
More on Fort William
Routes in season in September
- Scotland’s Highland Rail Line May – Sep
Planning Fort William in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.