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 shift into September finds Theydon Bois at an average high-temperature of an enjoyable 18.5°C (65.3°F), closely comparable to August's conditions. The temperature in Theydon Bois dips to an average of 11.2°C (52.2°F) during September nights.Humidity
In Theydon Bois, the average relative humidity in September is 78%.Rainfall
In Theydon Bois, United Kingdom, in September, during 11.2 rainfall days, 23mm (0.91") of precipitation is typically accumulated. In Theydon Bois, United Kingdom, during the entire year, the rain falls for 159.7 days and collects up to 378mm (14.88") of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 6:12 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:39 pm BST.
Sunshine
In September, the average sunshine is 7.3h.UV index
The average daily maximum UV index in September in Theydon Bois is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 in September translates into this advice:
Make use of precautions - It is urged to ward off sun damage. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the average September temperature in Theydon Bois?
What is the average humidity in September in Theydon Bois?
How much does it rain in Theydon Bois in September?
When it does not snow in Theydon Bois?
What is the average length of the day in September in Theydon Bois?
When are sunrise and sunset in September in Theydon Bois?
How long on average sun shines in September in Theydon Bois?
How high is the UV index in September in Theydon Bois?
Average temperature in September
Theydon Bois, United Kingdom
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is July (21.6°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 11.2°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Theydon Bois, United Kingdom
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in September
Theydon Bois, United Kingdom
- Average wind speed in September: 13.2km/h
The windiest month (with the highest average wind speed) is February (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in September
Theydon Bois, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Theydon Bois, United Kingdom
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Theydon Bois, United Kingdom
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (15.4 days).
The month with the least rainy days is September (11.2 days).
Average snowfall in September
Theydon Bois, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (31mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Theydon Bois, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 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
Theydon Bois, 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 month with the most sunshine is August (Average sunshine: 8h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Theydon Bois, United Kingdom
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in September
Theydon Bois, 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, November and December (UV index 2).
Average cloud cover in September
Theydon Bois, United Kingdom
- Average cloud cover in September: 47
The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 47).
Average visibility in September
Theydon Bois, 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).
Theydon Bois, United Kingdom
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