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
A moderate decline in average high-temperatures is noted in September, moving from an agreeable 21.7°C (71.1°F) in August to a refreshing 18.7°C (65.7°F). September nights in Hayes observe an average temperature dip to a cool 11.5°C (52.7°F).Humidity
In September, the average relative humidity is 77%.Rainfall
In Hayes, United Kingdom, in September, during 9.7 rainfall days, 21mm (0.83") of precipitation is typically accumulated. In Hayes, during the entire year, the rain falls for 151.6 days and collects up to 342mm (13.46") of precipitation.Snowfall
In Hayes, snow does not fall in May through October.Daylight
In September, the average length of the day in Hayes is 12h and 38min.On the first day of September in Hayes, sunrise is at 6:15 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:41 pm BST.
Sunshine
In Hayes, the average sunshine in September is 7.4h.UV index
The average daily maximum UV index in September in Hayes is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Act with care - The need to guard against sun damage is communicated. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What are the temperatures in Hayes in September?
What is the average humidity in September in Hayes?
How much does it rain in Hayes in September?
When it does not snow in Hayes?
How many hours of daylight does Hayes have in September?
When is the sunrise / sunset in September in Hayes?
How long on average sun shines in September in Hayes?
What is the UV index reading in September in Hayes?
Average temperature in September
Hayes, United Kingdom
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in September
Hayes, United Kingdom
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Hayes, United Kingdom
- Average wind speed in September: 12.9km/h
The windiest month (with the highest average wind speed) is February (17.7km/h).
The calmest month (with the lowest average wind speed) is September (12.9km/h).
Average humidity in September
Hayes, United Kingdom
- Average humidity in September: 77%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in September
Hayes, United Kingdom
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is December (38mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Hayes, United Kingdom
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is September (9.7 days).
Average snowfall in September
Hayes, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Hayes, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 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
Hayes, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 2min
The months with the most sunshine are July and August (Average sunshine: 8h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Hayes, United Kingdom
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is September (17.5 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Hayes, 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, March, November and December (UV index 2).
Average cloud cover in September
Hayes, United Kingdom
- Average cloud cover in September: 47
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 47).
Average visibility in September
Hayes, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (9km).
The month with the lowest visibility is November (8km).
Hayes, United Kingdom
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