September weather forecastRoydon, United Kingdom
September weather for Roydon, United Kingdom: The first month of the autumn, September, is still a refreshing month in Roydon, United Kingdom, with an average temperature fluctuating between 11.2°C (52.2°F) and 18.5°C (65.3°F). In Roydon, in September, during 11.2 rainfall days, 23mm (0.91") of precipitation is typically accumulated.
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Roydon, United Kingdom, with an average temperature fluctuating between 11.2°C (52.2°F) and 18.5°C (65.3°F).Temperature
The arrival of September is marked by an average high-temperature of a comfortable 18.5°C (65.3°F), bearing a close resemblance to August. Roydon sees an average low-temperature of 11.2°C (52.2°F) during September.Humidity
In Roydon, the average relative humidity in September is 78%.Rainfall
In Roydon, in September, during 11.2 rainfall days, 23mm (0.91") of precipitation is typically accumulated. Throughout the year, there are 159.7 rainfall days, and 378mm (14.88") of precipitation is accumulated.Snowfall
In Roydon, snow does not fall in April through October.Daylight
In Roydon, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:46 pm. On the last day of September, 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 is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Undertake protective steps - Preventing sun damage is advised. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, United Kingdom
- Average daylight in September: 12h and 36min
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 18min
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
Roydon, 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
Roydon, 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
Roydon, 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
Roydon, 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).
