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 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
Stepping into September, Bolton records an average high-temperature of a still refreshing 16.5°C (61.7°F), almost consistent with August. Throughout the nights in September, Bolton experiences an average low-temperature of 9.6°C (49.3°F).Humidity
In Bolton, the average relative humidity in September is 83%.Rainfall
In Bolton, in September, it is raining for 14.4 days, with typically 28mm (1.1") of accumulated precipitation. In Bolton, United Kingdom, during the entire year, the rain falls for 184 days and collects up to 389mm (15.31") of precipitation.Snowfall
May through November are months without snowfall.Daylight
In Bolton, United Kingdom, the average length of the day in September is 12h and 41min.On the first day of September, sunrise is at 6:19 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:48 pm BST.
Sunshine
In Bolton, United Kingdom, the average sunshine in September is 6h.UV index
In September, the average daily maximum UV index in Bolton is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 3 suggests these recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the average September temperature in Bolton?
What is the average humidity in September in Bolton?
How much does it rain in Bolton in September?
When it does not snow in Bolton?
How many hours of daylight does Bolton have in September?
When is the sunrise / sunset in September in Bolton?
How long on average sun shines in September in Bolton?
What is the UV index reading in September in Bolton?
Average temperature in September
Bolton, United Kingdom
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 9.6°C
The month with the highest average low temperature is August (12°C).
The coldest months (with the lowest average low temperature) are January and February (1.8°C).
Average pressure in September
Bolton, United Kingdom
- Average pressure in September: 1015.5mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed in September
Bolton, United Kingdom
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is February (17.4km/h).
The calmest month (with the lowest average wind speed) is June (12.3km/h).
Average humidity in September
Bolton, United Kingdom
- Average humidity in September: 83%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Bolton, United Kingdom
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is August (48mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in September
Bolton, United Kingdom
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is April (12.3 days).
Average snowfall in September
Bolton, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Bolton, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Bolton, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 6h and 0min
The months with the most sunshine are April and May (Average sunshine: 7h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 30min).
Average sunshine days in September
Bolton, United Kingdom
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is August (7.6 days).
Average UV index in September
Bolton, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Bolton, United Kingdom
- Average cloud cover in September: 59
The months with the most cloud cover are January and December (Cloud cover 66).
The month with the least cloud cover is April (Cloud cover 53).
Average visibility in September
Bolton, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are February, March, April, May, June, August, October and November (9km).
The months with the lowest visibility are January, July, September and December (8km).
Bolton, United Kingdom
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