September weather forecastDowne, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Downe, United Kingdom, with an average temperature fluctuating between 11.5°C (52.7°F) and 18.7°C (65.7°F).Temperature
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's pleasant 21.7°C (71.1°F) to an enjoyable 18.7°C (65.7°F). Throughout September, Downe experiences a low-temperature average of 11.5°C (52.7°F).Humidity
In September, the average relative humidity in Downe is 77%.Rainfall
In Downe, during September, the rain falls for 9.7 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, in Downe, there are 151.6 rainfall days, and 342mm (13.46") of precipitation is accumulated.Snowfall
In Downe, snow does not fall in May through October.Daylight
The average length of the day in September in Downe is 12h and 38min.On the first day of September, sunrise is at 6:13 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
The average sunshine in September is 7.4h.UV index
The average daily maximum UV index in September in Downe 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 UV index of 4 in September translates into these instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Downe, 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
Downe, 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
Downe, 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
Downe, 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
Downe, 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
Downe, 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
Downe, 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
Downe, 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
Downe, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 24min
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
Downe, 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
Downe, 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
Downe, 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
Downe, 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).
