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Weather in Fort William for September 2025

Your guide to Fort William weather in September - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Fort William usually enjoys a light touch of snow in September.
    According to Fort William snow forecast for September 2025, no snow is expected until the end of the month.

    • Temperatures

  • Until now, September 2025 in Fort William is slightly cooler than the historical average by -0.8 °C.

  • Expect cooler weather in the next days in Fort William with the forecast suggesting a temperature of 10.4 °C, lower than the historical average.

  • In general, the average temperature in Fort William at the beginning of September is 13.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 10.1 °C by the end of September.

    • Rain 🌧️

  • The climate of Fort William in September is notably wet, with an average of 12 rainy days, and a total of 90 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
16
Dry days
Average rainy days
12
Rainy days
Average snowy days
2
Snow days
Average temperatures
12°/6°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
85 %
Avg humidity

Fort William Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
12°
2
Light rain shower
13°
3
Light rain shower
10°
4
Light rain shower
11°
5
Mist
13°
6
Mist
17°
7
Overcast
19°
8
Light rain shower
15°
9
Light rain
10°
10
Light rain shower
10°
11
Light snow showers
8°
12
Light snow
8°
13
Light rain shower
8°
14
Light rain
11°
15
Moderate rain
9°
16
Patchy rain possible
11°
17
Patchy rain possible
9°
18
Moderate rain
12°
19
Moderate rain
10°
20
Partly cloudy
8°
21
Partly cloudy
10°
22
Patchy rain possible
8°
23
Patchy rain possible
13°
24
Patchy rain possible
9°
25
Patchy rain possible
12°
26
Patchy rain possible
13°
27
Patchy rain possible
13°
28
Moderate rain
8°
29
Patchy rain possible
9°
30
Light rain
7°

Temperatures trend during September in Fort William

See the weather trend as well as the moving average line

September weather in Fort William day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 12° /7° 8.3 mm 3
2 Sept. Light rain shower
Light rain shower
 13° /9° 4.9 mm 3
3 Sept. Light rain shower
Light rain shower
 10° /7° 4.1 mm 3
4 Sept. Light rain shower
Light rain shower
 11° /6° 1.7 mm 3
5 Sept. Mist
Mist
 13° /7° 0.8 mm 4
6 Sept. Mist
Mist
 17° /10° 0 mm 4
7 Sept. Overcast
Overcast
 19° /10° 7.5 mm 5
8 Sept. Light rain shower
Light rain shower
 15° /7° 1.7 mm 4
9 Sept. Light rain
Light rain
 10° /6° 5.3 mm 3
10 Sept. Light rain shower
Light rain shower
 10° /4° 11.1 mm 3
11 Sept. Light snow showers
Light snow showers
 8° /4° 6.2 mm 2
12 Sept. Light snow
Light snow
 8° /3° 5 mm 2
13 Sept. Light rain shower
Light rain shower
 8° /4° 4.9 mm 2
14 Sept. Light rain
Light rain
 11° /5° 7.8 mm 3
15 Sept. Moderate rain
Moderate rain
 9° /7° 8 mm 0.2
16 Sept. Patchy rain possible
Patchy rain possible
 11° /8° 0.7 mm 0.5
17 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 1.4 mm 0.1
18 Sept. Moderate rain
Moderate rain
 12° /8° 5.6 mm 0.4
19 Sept. Moderate rain
Moderate rain
 10° /8° 11.7 mm 0.3
20 Sept. Partly cloudy
Partly cloudy
 8° /4° 0.1 mm 3
21 Sept. Partly cloudy
Partly cloudy
 10° /3° 0 mm 3
22 Sept. Patchy rain possible
Patchy rain possible
 8° /5° 1.4 mm 2
23 Sept. Patchy rain possible
Patchy rain possible
 13° /8° 0.3 mm 2
24 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 0.4 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 0.3 mm 2
26 Sept. Patchy rain possible
Patchy rain possible
 13° /9° 1.1 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 13° /9° 4.2 mm 3
28 Sept. Moderate rain
Moderate rain
 8° /5° 10.3 mm 2
29 Sept. Patchy rain possible
Patchy rain possible
 9° /5° 0.2 mm 2
30 Sept. Light rain
Light rain
 7° /4° 8 mm 2
Next
Important Notice
Our weather forecast for Fort William in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Fort William forecast closer to your planned date for the most up-to-date weather information.
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Fort William in September - FAQ

What are the expected maximum and minimum temperatures in Fort William during September?
During September, expect a variety of temperatures with highs around 12° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Fort William during September?
Moderate rainfall is anticipated in Fort William during September, with a total of 90 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
Will it snow in Fort William in September 2025?
Fort William experiences an average snowfall of 13.26 cm during September, occurring over 2 days.
What are the typical wind conditions in Fort William during September?
The average wind speed in Fort William during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Fort William

Explore the daily rainfall trends and prepare for Fort Williams September weather 💧

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Location coordinates Where is Fort William?

Get accurate weather forecasts for Fort William, located at latitude 56.816 and longitude -5.112. Stay updated with localized weather information tailored for Fort William.

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