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 introduction of September sees an average high-temperature of a still refreshing 13.5°C (56.3°F), hardly deviating from August. Keiss indicates a consistently low-temperature of 11.4°C (52.5°F) during the nights of September.Humidity
In September, the average relative humidity in Keiss is 83%.Rainfall
In Keiss, United Kingdom, during September, the rain falls for 18.8 days and regularly aggregates up to 42mm (1.65") of precipitation. Throughout the year, there are 224.1 rainfall days, and 528mm (20.79") of precipitation is accumulated.Snowfall
In Keiss, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 49min.On the first day of September, sunrise is at 6:12 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:48 pm BST.
Sunshine
In Keiss, the average sunshine in September is 6.3h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 4 in September leads to these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What is the temperature in September in Keiss?
What is the average humidity in September in Keiss?
How much does it rain in Keiss in September?
When it does not snow in Keiss?
How many hours of daylight does Keiss have in September?
When are sunrise and sunset in September in Keiss?
How many hours of sunshine does Keiss have in September?
What are the months with the highest UV index in Keiss?
How high is the UV index in September in Keiss?
Average temperature in September
Keiss, United Kingdom
- Average high temperature in September: 13.5°C
The warmest month (with the highest average high temperature) is August (14.7°C).
The month with the lowest average high temperature is February (6.7°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is February (4.8°C).
Average pressure in September
Keiss, United Kingdom
- Average pressure in September: 1011.1mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1004.4mbar).
Average wind speed in September
Keiss, United Kingdom
- Average wind speed in September: 24.9km/h
The windiest month (with the highest average wind speed) is January (33.1km/h).
The calmest month (with the lowest average wind speed) is July (19.4km/h).
Average humidity in September
Keiss, United Kingdom
- Average humidity in September: 83%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are January, February and December (77%).
Average rainfall in September
Keiss, United Kingdom
- Average rainfall in September: 42mm
The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (31mm).
Average rainfall days in September
Keiss, United Kingdom
- Average rainfall days in September: 18.8 days
The month with the highest number of rainy days is October (21.1 days).
The month with the least rainy days is February (16.5 days).
Average snowfall in September
Keiss, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are February and December (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Keiss, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (2.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Keiss, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 12min).
The month with the shortest days is December (Average daylight: 6h and 30min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is June (Average sunshine: 7h and 48min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in September
Keiss, United Kingdom
- Average sunshine days in September: 8.7 days
The month with the most sunshine days is May (10.1 days).
The months with the least sunshine days are October and November (6.5 days).
Average UV index in September
Keiss, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June, July, August and September (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
Keiss, United Kingdom
- Average cloud cover in September: 57
The month with the most cloud cover is March (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 55).
Average visibility in September
Keiss, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, June, August, September, October and November (10km).
The months with the lowest visibility are January, May, July and December (9km).
Keiss, United Kingdom
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