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
At the start of September, Halton's average high-temperature reaches a still enjoyable 16.8°C (62.2°F), subtly different from the preceding month. The mean low-temperature during September nights is a cool 10.5°C (50.9°F).Humidity
The average relative humidity in September is 82%.Rainfall
In September, in Halton, the rain falls for 15.1 days. Throughout September, 39mm (1.54") of precipitation is accumulated. In Halton, during the entire year, the rain falls for 203.8 days and collects up to 519mm (20.43") of precipitation.Snowfall
In Halton, United Kingdom, snow does not fall in May through October.Daylight
The average length of the day in September in Halton is 12h and 41min.On the first day of the month, sunrise is at 6:21 am and sunset at 8:00 pm. On the last day of September, in Halton, sunrise is at 7:11 am and sunset at 6:49 pm BST.
Sunshine
The average sunshine in September is 6.9h.UV index
In Halton, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Take precautions - Protection against skin and eye damage is obliged. Around midday, solar radiation is most harmful; hence, exposure should be limited. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What are September temperatures in Halton?
What is the average humidity in September in Halton?
How much does it rain in Halton in September?
When it does not snow in Halton?
How many hours of daylight does Halton have in September?
What time are sunrise and sunset in September in Halton?
How many hours of sunshine does Halton have in September?
What is the UV index intensity in September in Halton?
Average temperature in September
Halton, United Kingdom
- Average high temperature in September: 16.8°C
The warmest month (with the highest average high temperature) is July (19.1°C).
The month with the lowest average high temperature is January (6.5°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (2.7°C).
Average pressure in September
Halton, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1009mbar).
Average wind speed in September
Halton, United Kingdom
- Average wind speed in September: 14.1km/h
The windiest month (with the highest average wind speed) is January (18.5km/h).
The calmest month (with the lowest average wind speed) is June (12.5km/h).
Average humidity in September
Halton, United Kingdom
- Average humidity in September: 82%
The months with the highest relative humidity are January and December (86%).
The months with the lowest relative humidity are April and May (79%).
Average rainfall in September
Halton, United Kingdom
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is June (58mm).
The driest month (with the least rainfall) is April (27mm).
Average rainfall days in September
Halton, United Kingdom
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is August (20.3 days).
The month with the least rainy days is March (14.1 days).
Average snowfall in September
Halton, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (23mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Halton, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 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
Halton, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 6h and 5min
The months with the most sunshine are April, May and July (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).
Average sunshine days in September
Halton, United Kingdom
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is March (13.8 days).
The month with the least sunshine days is August (7.8 days).
Average UV index in September
Halton, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Halton, United Kingdom
- Average cloud cover in September: 52
The months with the most cloud cover are January, November and December (Cloud cover 59).
The month with the least cloud cover is April (Cloud cover 48).
Average visibility in September
Halton, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Halton, United Kingdom
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