September weather forecastHenlow, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Henlow, United Kingdom, with an average temperature varying between 10.8°C (51.4°F) and 18.3°C (64.9°F).Temperature
Transitioning into September, Henlow records an average high-temperature of an enjoyable 18.3°C (64.9°F), almost identical to August's 21°C (69.8°F). During the month of September, Henlow's nighttime temperature lowers to an average of 10.8°C (51.4°F).Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.6 days and typically collects 15mm (0.59") of precipitation.Snowfall
April through November are months without snowfall in Henlow.Daylight
In September, the average length of the day is 12h and 39min.On the first day of the month, sunrise is at 6:13 am and sunset at 7:48 pm. On the last day of September, in Henlow, sunrise is at 7:01 am and sunset at 6:40 pm BST.
Sunshine
In Henlow, the average sunshine in September is 7.1h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: An average UV index of 4 in September transforms into this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. To protect against the Sun's most potent rays, avoid direct exposure around midday. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Henlow, United Kingdom
- Average high temperature in September: 18.3°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (6°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in September
Henlow, United Kingdom
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.1mbar).
Average wind speed in September
Henlow, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12.8km/h).
Average humidity in September
Henlow, 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 (76%).
Average rainfall in September
Henlow, United Kingdom
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (38mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in September
Henlow, United Kingdom
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is September (8.6 days).
Average snowfall in September
Henlow, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (13mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Henlow, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.6 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
Henlow, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 7h and 6min
The months with the most sunshine are July and August (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Henlow, United Kingdom
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is March (16.4 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Henlow, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Henlow, United Kingdom
- Average cloud cover in September: 49
The months with the most cloud cover are February and November (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in September
Henlow, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
