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
The arrival of September is marked by an average high-temperature of a still comfortable 16.5°C (61.7°F), bearing a close resemblance to August. In Atherton, September nights cool down to an average of 9.6°C (49.3°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In Atherton, in September, it is raining for 14.4 days, with typically 28mm (1.1") of accumulated precipitation. Throughout the year, there are 184 rainfall days, and 389mm (15.31") of precipitation is accumulated.Snowfall
In Atherton, snow does not fall in May through November.Daylight
In September, the average length of the day is 12h and 41min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:59 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:48 pm BST.
Sunshine
The average sunshine in September is 6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 3 in September transforms into this advice:
Ensure safety - Imperative it is to shield skin and eyes from damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the average September temperature in Atherton?
What is the average humidity in September in Atherton?
How much does it rain in Atherton in September?
When it does not snow in Atherton?
What is the average length of the day in September in Atherton?
What time are sunrise and sunset in September in Atherton?
How long on average sun shines in September in Atherton?
What is the UV index reading in September in Atherton?
Average temperature in September
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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 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
Atherton, 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
Atherton, 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
Atherton, 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
Atherton, 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).
Atherton, United Kingdom
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