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
The arrival of September brings an average high-temperature of a comfortable 17.9°C (64.2°F), closely following the temperature pattern of August. An average minimum temperature of 12.4°C (54.3°F) marks the month of September in Mattishall.Humidity
In Mattishall, the average relative humidity in September is 78%.Rainfall
In Mattishall, United Kingdom, in September, it is raining for 12.3 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, there are 169.3 rainfall days, and 297mm (11.69") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Mattishall.Daylight
The average length of the day in September is 12h and 40min.On the first day of September in Mattishall, sunrise is at 6:07 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:34 pm BST.
Sunshine
In September, the average sunshine in Mattishall is 7.8h.UV index
The average daily maximum UV index in September in Mattishall is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, an average UV index of 4 transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mattishall in September?
What is the average humidity in September in Mattishall?
How many days does it rain in September in Mattishall?
When it does not snow in Mattishall?
How many hours of daylight does Mattishall have in September?
When is the sunrise / sunset in September in Mattishall?
How many hours of sunshine does Mattishall have in September?
What is the UV index intensity in September in Mattishall?
Average temperature in September
Mattishall, United Kingdom
- Average high temperature in September: 17.9°C
The warmest month (with the highest average high temperature) is August (20.3°C).
The month with the lowest average high temperature is January (6.4°C).
- Average low temperature in September: 12.4°C
The month with the highest average low temperature is August (14.4°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).
Average pressure in September
Mattishall, United Kingdom
- Average pressure in September: 1016.3mbar
The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in September
Mattishall, United Kingdom
- Average wind speed in September: 16.2km/h
The windiest month (with the highest average wind speed) is December (22.2km/h).
The calmest month (with the lowest average wind speed) is July (14.5km/h).
Average humidity in September
Mattishall, United Kingdom
- Average humidity in September: 78%
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is August (76%).
Average rainfall in September
Mattishall, United Kingdom
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is October (33mm).
The driest month (with the least rainfall) is April (13mm).
Average rainfall days in September
Mattishall, United Kingdom
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is February (11.6 days).
Average snowfall in September
Mattishall, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Mattishall, 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
Mattishall, 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: 7h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Mattishall, United Kingdom
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is April (15.1 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in September
Mattishall, 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
Mattishall, United Kingdom
- Average cloud cover in September: 43
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in September
Mattishall, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, August, September, October and November (10km).
The months with the lowest visibility are January, February, June, July and December (9km).
Mattishall, United Kingdom
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