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 advent of September denotes an average high-temperature of an enjoyable 19.1°C (66.4°F), subtly different from August's 21.9°C (71.4°F). In September, Herne Hill's temperature tends to fall to an average low of 11.3°C (52.3°F) during the night.Humidity
In September, the average relative humidity in Herne Hill is 76%.Rainfall
In Herne Hill, in September, it is raining for 11.9 days, with typically 24mm (0.94") of accumulated precipitation. In Herne Hill, during the entire year, the rain falls for 166.8 days and collects up to 362mm (14.25") of precipitation.Snowfall
In Herne Hill, United Kingdom, snow does not fall in May through October.Daylight
In Herne Hill, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:46 pm. On the last day of September, in Herne Hill, sunrise is at 7:00 am and sunset at 6:40 pm BST.
Sunshine
The average sunshine in September is 7.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the usual temperature for Herne Hill in September?
What is the average humidity in September in Herne Hill?
How many days does it rain in September in Herne Hill?
When it does not snow in Herne Hill?
How many hours of daylight does Herne Hill have in September?
When is the sunrise / sunset in September in Herne Hill?
How long on average sun shines in September in Herne Hill?
What is the UV index intensity in September in Herne Hill?
Average temperature in September
Herne Hill, United Kingdom
- Average high temperature in September: 19.1°C
The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.3°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 (2.2°C).
Average pressure in September
Herne Hill, United Kingdom
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).
Average wind speed in September
Herne Hill, United Kingdom
- Average wind speed in September: 12.6km/h
The windiest month (with the highest average wind speed) is February (17.3km/h).
The calmest month (with the lowest average wind speed) is September (12.6km/h).
Average humidity in September
Herne Hill, United Kingdom
- Average humidity in September: 76%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (72%).
Average rainfall in September
Herne Hill, United Kingdom
- Average rainfall in September: 24mm
The wettest months (with the highest rainfall) are June and December (40mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Herne Hill, United Kingdom
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (11.5 days).
Average snowfall in September
Herne Hill, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Herne Hill, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 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
Herne Hill, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is August (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Herne Hill, United Kingdom
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (15.9 days).
The month with the least sunshine days is June (10.1 days).
Average UV index in September
Herne Hill, 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
Herne Hill, United Kingdom
- Average cloud cover in September: 50
The months with the most cloud cover are February and November (Cloud cover 61).
The months with the least cloud cover are April, August and September (Cloud cover 50).
Average visibility in September
Herne Hill, 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).
Herne Hill, United Kingdom
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