Fort William weather in August
August in Fort William: nice, rainy, with clean air — fine if you can take 19 rainy days.
#3 of 12 months in Fort William · #304 of 897 destinations to visit in August · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Fort William in August
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Fort William climate normals — August
| Daytime high | 18°C / 64°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Rainfall | 143 mm / 5.6 in | 🌧 rainy |
| Rainy days | 19 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 15.1 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 28 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Fort William in August — FAQ
- Is August a good time to visit Fort William?
- August in Fort William: nice, rainy, with clean air — fine if you can take 19 rainy days. It ranks #3 of 12 months for Fort William on SeasonMap's comfort score (86/100).
- What is the weather like in Fort William in August?
- In August, Fort William averages a daily high of 17.8°C and a low of 12.3°C, with about 142.7 mm of rain over roughly 19.4 rainy days.
- What is the air quality in Fort William in August?
- Fort William has a mean US Air Quality Index of about 28 in August.