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's advent denotes a minor fluctuation in the average high-temperature to a comfortable 18°C (64.4°F) from August's 20.4°C (68.7°F). The low-temperature average for Swaffham during September stands at a cool 11.6°C (52.9°F).Humidity
The average relative humidity in September in Swaffham is 79%.Rainfall
In Swaffham, United Kingdom, in September, it is raining for 12 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, there are 173.5 rainfall days, and 370mm (14.57") of precipitation is accumulated.Snowfall
In Swaffham, snow does not fall in April through October.Daylight
In Swaffham, the average length of the day in September is 12h and 40min.On the first day of September in Swaffham, sunrise is at 6:08 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:36 pm BST.
Sunshine
In September, the average sunshine is 7.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the temperature in September in Swaffham?
What is the average humidity in September in Swaffham?
How many days does it rain in September in Swaffham?
When it does not snow in Swaffham?
What is the average length of the day in September in Swaffham?
When is the sunrise / sunset in September in Swaffham?
How many hours of sunshine does Swaffham have in September?
What is the UV index intensity in September in Swaffham?
Average temperature in September
Swaffham, United Kingdom
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is August (20.4°C).
The month with the lowest average high temperature is January (6.1°C).
- Average low temperature in September: 11.6°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in September
Swaffham, United Kingdom
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in September
Swaffham, United Kingdom
- Average wind speed in September: 15.1km/h
The windiest month (with the highest average wind speed) is December (20.7km/h).
The calmest month (with the lowest average wind speed) is July (13.5km/h).
Average humidity in September
Swaffham, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Swaffham, United Kingdom
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is July (46mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Swaffham, United Kingdom
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (11.8 days).
Average snowfall in September
Swaffham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (26mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Swaffham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Swaffham, 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 3min
The month with the most sunshine is August (Average sunshine: 8h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Swaffham, United Kingdom
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Swaffham, 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
Swaffham, United Kingdom
- Average cloud cover in September: 46
The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 45).
Average visibility in September
Swaffham, United Kingdom
- Average visibility in September: 9km
The month with the highest visibility is March (10km).
The months with the lowest visibility are January, February, April, May, June, July, August, September, October, November and December (9km).
Swaffham, United Kingdom
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