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
September reports an average high-temperature of a comfortable 17.9°C (64.2°F), slightly varied from August's 20.3°C (68.5°F). In South Witham, the average low-temperature during the month of September is a cool 10.6°C (51.1°F).Humidity
In South Witham, the average relative humidity in September is 79%.Rainfall
In South Witham, during September, the rain falls for 10.3 days and regularly aggregates up to 18mm (0.71") of precipitation. In South Witham, during the entire year, the rain falls for 152.3 days and collects up to 262mm (10.31") of precipitation.Snowfall
In South Witham, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:41 pm BST.
Sunshine
In September, the average sunshine in South Witham, United Kingdom, is 6.9h.UV index
In September, the average daily maximum UV index in South Witham is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Ensure safety - Sun damage prevention is strongly urged. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the average September temperature in South Witham?
What is the average humidity in September in South Witham?
How many days does it rain in September in South Witham?
When it does not snow in South Witham?
What is the average length of the day in September in South Witham?
What time are sunrise and sunset in September in South Witham?
How long on average sun shines in September in South Witham?
How high is the UV index in September in South Witham?
Average temperature in September
South Witham, United Kingdom
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 10.6°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.6°C).
Average pressure in September
South Witham, United Kingdom
- Average pressure in September: 1016.1mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
South Witham, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in September
South Witham, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
South Witham, United Kingdom
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is June (37mm).
The driest months (with the least rainfall) are March and April (15mm).
Average rainfall days in September
South Witham, United Kingdom
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (8.9 days).
Average snowfall in September
South Witham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
South Witham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 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
South Witham, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 7h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
South Witham, United Kingdom
- Average sunshine days in September: 15.8 days
The months with the most sunshine days are October and December (15.9 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in September
South Witham, 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, November and December (UV index 2).
Average cloud cover in September
South Witham, United Kingdom
- Average cloud cover in September: 49
The month with the most cloud cover is November (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in September
South Witham, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, July, August, September, October and December (9km).
The months with the lowest visibility are June and November (8km).
South Witham, United Kingdom
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