Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Fort William's shift into September sets the average high-temperature at a fresh 12.4°C (54.3°F), a figure that deviates only slightly from August's 14.3°C (57.7°F). Fort William registers a gentle descent to an average nighttime low of 7.4°C (45.3°F) in September from its daytime highs.Humidity
In September, the average relative humidity in Fort William is 91%.Rainfall
In Fort William, United Kingdom, in September, it is raining for 21.2 days, with typically 77mm (3.03") of accumulated precipitation. In Fort William, during the entire year, the rain falls for 253 days and collects up to 1104mm (43.46") of precipitation.Snowfall
In Fort William, snow does not fall in May through September.Sea temperature
In September, the average sea temperature in Fort William is 13.3°C (55.9°F).Note: Diving into 13.3°C (55.9°F) when it's under 10°C (50°F) can cause immediate cold shock symptoms, marked by hyperventilation.
Daylight
The average length of the day in September in Fort William is 12h and 46min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:16 pm. On the last day of September, in Fort William, sunrise is at 7:23 am and sunset at 6:57 pm BST.
Sunshine
In September, the average sunshine in Fort William is 4h.UV index
May through September, with an average maximum UV index of 3, are months with the highest UV index in Fort William, United Kingdom. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What is the usual temperature for Fort William in September?
What is the average humidity in September in Fort William?
How many days does it rain in September in Fort William?
When it does not snow in Fort William?
Does it snow in Fort William in September?
What is the sea water temperature in September in Fort William?
How many hours of daylight does Fort William have in September?
When is the sunrise / sunset in September in Fort William?
How many hours of sunshine does Fort William have in September?
What are the months with the highest UV index in Fort William?
How high is the UV index in September in Fort William?
Average temperature in September
Fort William, United Kingdom
- Average high temperature in September: 12.4°C
The warmest month (with the highest average high temperature) is July (14.8°C).
The month with the lowest average high temperature is January (2.9°C).
- Average low temperature in September: 7.4°C
The month with the highest average low temperature is July (8.5°C).
The coldest month (with the lowest average low temperature) is February (-0.4°C).
Average pressure in September
Fort William, United Kingdom
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is November (1005.9mbar).
Average wind speed in September
Fort William, United Kingdom
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is January (15.7km/h).
The calmest month (with the lowest average wind speed) is June (9.6km/h).
Average humidity in September
Fort William, United Kingdom
- Average humidity in September: 91%
The months with the highest relative humidity are January, November and December (92%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Fort William, United Kingdom
- Average rainfall in September: 77mm
The wettest month (with the highest rainfall) is December (133mm).
The driest month (with the least rainfall) is April (47mm).
Average rainfall days in September
Fort William, United Kingdom
- Average rainfall days in September: 21.2 days
The month with the highest number of rainy days is August (24.9 days).
The month with the least rainy days is February (17.4 days).
Average snowfall in September
Fort William, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (99mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Fort William, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Fort William, United Kingdom
- Average sea temperature in September: 13.3°C
The best month for swimming (with the highest average sea temperature) is August (13.4°C).
The coldest month (with the lowest average sea temperature) is March (7.1°C).
Average daylight in September /
Average sunshine in September
Fort William, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 42min).
The month with the shortest days is December (Average daylight: 6h and 54min).
- Average sunshine in September: 4h and 0min
The month with the most sunshine is June (Average sunshine: 5h and 48min).
The months with the least sunshine are January and February (Average sunshine: 2h and 48min).
Average sunshine days in September
Fort William, United Kingdom
- Average sunshine days in September: 5.5 days
The month with the most sunshine days is April (8.5 days).
The month with the least sunshine days is August (3.5 days).
Average UV index in September
Fort William, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July, August and September (UV index 3).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Fort William, United Kingdom
- Average cloud cover in September: 76
The month with the most cloud cover is August (Cloud cover 77).
The month with the least cloud cover is April (Cloud cover 64).
Average visibility in September
Fort William, United Kingdom
- Average visibility in September: 7km
The months with the highest visibility are February, March, April, May, June and October (8km).
The months with the lowest visibility are January, July, August, September, November and December (7km).
Fort William, United Kingdom
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