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
September
Weather in September
Temperature
The onset of September brings an average high-temperature of a refreshing 18.4°C (65.1°F), nearly matching the August temperature. Throughout September, the nighttime temperature averages to a cool 11.5°C (52.7°F).Humidity
The average relative humidity in September is 78%.Rainfall
In Thetford, during September, the rain falls for 11.3 days and regularly aggregates up to 24mm (0.94") of precipitation. In Thetford, during the entire year, the rain falls for 169.1 days and collects up to 379mm (14.92") of precipitation.Snowfall
In Thetford, snow does not fall in April through October.Daylight
In Thetford, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:09 am and sunset at 7:44 pm. On the last day of September, in Thetford, United Kingdom, sunrise is at 6:57 am and sunset at 6:36 pm BST.
Sunshine
In September, the average sunshine is 7.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Thetford?
What is the average humidity in September in Thetford?
How much does it rain in Thetford in September?
When it does not snow in Thetford?
How many hours of daylight does Thetford have in September?
When is the sunrise / sunset in September in Thetford?
How long on average sun shines in September in Thetford?
What is the UV index intensity in September in Thetford?
Average temperature in September
Thetford, United Kingdom
- Average high temperature in September: 18.4°C
The warmest month (with the highest average high temperature) is August (21.2°C).
The month with the lowest average high temperature is January (6.2°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Thetford, United Kingdom
- Average pressure in September: 1016.4mbar
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
Thetford, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest months (with the highest average wind speed) are February and December (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in September
Thetford, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Thetford, United Kingdom
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is April (17mm).
Average rainfall days in September
Thetford, United Kingdom
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is September (11.3 days).
Average snowfall in September
Thetford, 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
Thetford, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 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
Thetford, United Kingdom
- Average daylight in September: 12h and 4min
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 2min
The month with the most sunshine is August (Average sunshine: 8h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Thetford, United Kingdom
- Average sunshine days in September: 16 days
The month with the most sunshine days is September (16 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Thetford, 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, March, November and December (UV index 2).
Average cloud cover in September
Thetford, 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 August (Cloud cover 46).
Average visibility in September
Thetford, 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).
