Fort William Weather in September
Average highs run from 14°C on September 1 to 11°C on September 30, and lows from 8°C to 6°C. Normal precipitation for the month is 144 mm over about 21 wet days.
September day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
September at a glance
- Average high
- 13°C
- Average low
- 7°C
- Precipitation
- 144 mm
- Reanalysis high
- 21°CSep 4, 1991
- Reanalysis low
- 1°CSep 27, 2007
- Daylight
- 13 h 54 min to 11 h 36 min
- Cloud cover
- 78%
- Humidity
- 92%
- Dew point
- 9°C
- Wind
- 18.0 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 14°C | 8°C | 20°C 1991 | 6°C 2002 | 75% |
| Sep 2 | 14°C | 8°C | 21°C 1991 | 5°C 2000 | 75% |
| Sep 3 | 14°C | 8°C | 20°C 1991 | 3°C 2000 | 75% |
| Sep 4 | 14°C | 8°C | 21°C 1991 | 2°C 1993 | 75% |
| Sep 5 | 14°C | 8°C | 20°C 2005 | 3°C 1993 | 74% |
| Sep 6 | 14°C | 8°C | 18°C 1996 | 4°C 2013 | 73% |
| Sep 7 | 13°C | 8°C | 18°C 2004 | 4°C 2019 | 73% |
| Sep 8 | 13°C | 8°C | 17°C 2004 | 4°C 2019 | 72% |
| Sep 9 | 13°C | 8°C | 18°C 2004 | 5°C 1994 | 72% |
| Sep 10 | 13°C | 8°C | 18°C 2004 | 3°C 1991 | 71% |
| Sep 11 | 13°C | 7°C | 18°C 2014 | 2°C 1991 | 70% |
| Sep 12 | 13°C | 7°C | 18°C 2002 | 2°C 1991 | 70% |
| Sep 13 | 13°C | 7°C | 18°C 2002 | 3°C 1998 | 70% |
| Sep 14 | 13°C | 7°C | 19°C 2002 | 2°C 1994 | 70% |
| Sep 15 | 13°C | 7°C | 18°C 2016 | 2°C 2007 | 69% |
| Sep 16 | 13°C | 7°C | 17°C 2006 | 2°C 2005 | 69% |
| Sep 17 | 12°C | 7°C | 17°C 2014 | 2°C 2007 | 68% |
| Sep 18 | 12°C | 7°C | 19°C 2020 | 2°C 2007 | 69% |
| Sep 19 | 12°C | 7°C | 18°C 2020 | 2°C 1997 | 67% |
| Sep 20 | 12°C | 7°C | 17°C 2019 | 1°C 1997 | 68% |
| Sep 21 | 12°C | 7°C | 19°C 1998 | 1°C 2012 | 69% |
| Sep 22 | 12°C | 7°C | 18°C 1998 | 2°C 2012 | 69% |
| Sep 23 | 12°C | 7°C | 17°C 2000 | 2°C 2003 | 70% |
| Sep 24 | 12°C | 7°C | 17°C 2019 | 2°C 2010 | 70% |
| Sep 25 | 12°C | 7°C | 16°C 1997 | 2°C 2010 | 72% |
| Sep 26 | 12°C | 7°C | 14°C 2017 | 1°C 2020 | 73% |
| Sep 27 | 11°C | 6°C | 15°C 2006 | 1°C 2007 | 74% |
| Sep 28 | 11°C | 6°C | 18°C 2011 | 1°C 1995 | 74% |
| Sep 29 | 11°C | 6°C | 15°C 2011 | 2°C 1991 | 75% |
| Sep 30 | 11°C | 6°C | 17°C 2011 | 1°C 1991 | 76% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- September 1
- sunrise 6:23 AM, sunset 8:17 PM
- September 30
- sunrise 7:22 AM, sunset 6:58 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.