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
Selsey's average high-temperature in September is a still enjoyable 17.8°C (64°F), marking an insignificant difference from the 19.5°C (67.1°F) of August. Selsey, during September nights, observes a steady temperature, averaging at a moderate 13°C (55.4°F).Humidity
With an average relative humidity of 79%, September is the least humid month in Selsey, United Kingdom.Rainfall
In Selsey, in September, during 12.6 rainfall days, 33mm (1.3") of precipitation is typically accumulated. Throughout the year, in Selsey, there are 183.3 rainfall days, and 504mm (19.84") of precipitation is accumulated.Snowfall
March through October are months without snowfall.Daylight
In Selsey, the average length of the day in September is 12h and 37min.On the first day of September in Selsey, sunrise is at 6:17 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:43 pm BST.
Sunshine
In Selsey, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the temperature in September in Selsey?
What is the least humid month in Selsey?
What is the average humidity in September in Selsey?
How many days does it rain in September in Selsey?
When it does not snow in Selsey?
What is the average length of the day in September in Selsey?
When are sunrise and sunset in September in Selsey?
How long on average sun shines in September in Selsey?
What is the UV index intensity in September in Selsey?
Average temperature in September
Selsey, United Kingdom
- Average high temperature in September: 17.8°C
The warmest month (with the highest average high temperature) is August (19.5°C).
The month with the lowest average high temperature is February (7.7°C).
- Average low temperature in September: 13°C
The month with the highest average low temperature is August (14.6°C).
The coldest month (with the lowest average low temperature) is February (4.3°C).
Average pressure in September
Selsey, United Kingdom
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in September
Selsey, United Kingdom
- Average wind speed in September: 18.6km/h
The windiest month (with the highest average wind speed) is December (24.8km/h).
The calmest month (with the lowest average wind speed) is July (16.9km/h).
Average humidity in September
Selsey, United Kingdom
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (84%).
The month with the lowest relative humidity is September (79%).
Average rainfall in September
Selsey, United Kingdom
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is December (64mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Selsey, United Kingdom
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is November (18.8 days).
The month with the least rainy days is September (12.6 days).
Average snowfall in September
Selsey, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (7mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Selsey, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.8 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
Selsey, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Selsey, United Kingdom
- Average sunshine days in September: 13 days
The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is November (8.3 days).
Average UV index in September
Selsey, 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 and February (UV index 2).
Average cloud cover in September
Selsey, United Kingdom
- Average cloud cover in September: 40
The month with the most cloud cover is November (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 39).
Average visibility in September
Selsey, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Selsey, United Kingdom
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