September weather forecastHalwell, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Halwell, United Kingdom, with an average temperature varying between 16.9°C (62.4°F) and 12.6°C (54.7°F).Temperature
Halwell's September showcases an average high-temperature of a still refreshing 16.9°C (62.4°F), hardly distinct from August's 18.3°C (64.9°F). The month of September in Halwell, United Kingdom, shows a minor drop from daytime temperatures, generally recording a low average of 12.6°C (54.7°F).Humidity
In Halwell, the average relative humidity in September is 83%.Rainfall
In Halwell, in September, it is raining for 14.5 days, with typically 33mm (1.3") of accumulated precipitation. In Halwell, during the entire year, the rain falls for 199.6 days and collects up to 604mm (23.78") of precipitation.Snowfall
In Halwell, United Kingdom, snow does not fall in March through October.Daylight
In September, the average length of the day is 12h and 37min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:59 pm. On the last day of September, in Halwell, sunrise is at 7:14 am and sunset at 6:55 pm BST.
Sunshine
The average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Halwell, United Kingdom
- Average high temperature in September: 16.9°C
The warmest month (with the highest average high temperature) is July (18.5°C).
The month with the lowest average high temperature is February (8.5°C).
- Average low temperature in September: 12.6°C
The month with the highest average low temperature is August (13.9°C).
The coldest month (with the lowest average low temperature) is February (5.2°C).
Average pressure in September
Halwell, United Kingdom
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in September
Halwell, United Kingdom
- Average wind speed in September: 19.3km/h
The windiest month (with the highest average wind speed) is December (26.3km/h).
The calmest month (with the lowest average wind speed) is July (16.9km/h).
Average humidity in September
Halwell, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are June and October (84%).
The months with the lowest relative humidity are February, March and April (82%).
Average rainfall in September
Halwell, United Kingdom
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is November (72mm).
The driest month (with the least rainfall) is May (32mm).
Average rainfall days in September
Halwell, United Kingdom
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is September (14.5 days).
Average snowfall in September
Halwell, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (10mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Halwell, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.1 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
Halwell, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is July (Average sunshine: 8h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 12min).
Average sunshine days in September
Halwell, United Kingdom
- Average sunshine days in September: 10.6 days
The month with the most sunshine days is April (11.8 days).
The months with the least sunshine days are August and November (8 days).
Average UV index in September
Halwell, United Kingdom
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Halwell, United Kingdom
- Average cloud cover in September: 45
The month with the most cloud cover is November (Cloud cover 58).
The month with the least cloud cover is April (Cloud cover 43).
Average visibility in September
Halwell, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, April, June, July, September and November (10km).
The months with the lowest visibility are January, March, May, August, October and December (9km).
