Weather in September
Temperature
The beginning of September records an average high-temperature of a still refreshing 14°C (57.2°F), almost echoing the conditions of the previous month. In the month of September, Isle of Lewis experiences an average low-temperature of 8°C (46.4°F).Rainfall
Throughout September, 106mm (4.17") of precipitation is accumulated. Throughout the year, in Isle of Lewis, 1197mm (47.13") of rain is accumulated.Sea temperature
In Isle of Lewis, the average seawater temperature in September is 13.2°C (55.8°F).Note: Immersing oneself in 13.2°C (55.8°F) at sub-10°C (14°F) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
In Isle of Lewis, the average length of the day in September is 12h and 48min.On the first day of September, sunrise is at 6:27 am and sunset at 8:25 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:02 pm BST.
Sunshine
In September, the average sunshine is 3.6h.Frequently asked questions
What are the temperatures in Isle of Lewis in September?
How much does it rain in Isle of Lewis in September?
How cold is the water in September in Isle of Lewis?
How many hours of daylight does Isle of Lewis have in September?
What time are sunrise and sunset in September in Isle of Lewis?
How long on average sun shines in September in Isle of Lewis?
Average temperature in September
Isle of Lewis, United Kingdom
- Average high temperature in September: 14°C
The warmest months (with the highest average high temperature) are July and August (16°C).
The months with the lowest average high temperature are January, February and December (7°C).
- Average low temperature in September: 8°C
The months with the highest average low temperature are July and August (10°C).
The coldest months (with the lowest average low temperature) are January, February, March and December (2°C).
Average rainfall in September
Isle of Lewis, United Kingdom
- Average rainfall in September: 106.4mm
The wettest month (with the highest rainfall) is December (135.8mm).
The driest month (with the least rainfall) is May (61.9mm).
Average sea temperature in September
Isle of Lewis, United Kingdom
- Average sea temperature in September: 13.2°C
The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (7.6°C).
Average daylight in September /
Average sunshine in September
Isle of Lewis, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in September: 3h and 4min
The month with the most sunshine is May (Average sunshine: 6h and 12min).
The month with the least sunshine is December (Average sunshine: 0h and 48min).
Isle of Lewis, United Kingdom
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