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
Spennithorne's average high-temperature in September is a still refreshing 16.5°C (61.7°F), indicating a subtle variation from August. Spennithorne experiences an average temperature drop to a frosty 9.2°C (48.6°F) during September nights.Humidity
The average relative humidity in September in Spennithorne, United Kingdom, is 83%.Rainfall
In Spennithorne, United Kingdom, in September, during 7.5 rainfall days, 12mm (0.47") of precipitation is typically accumulated. Throughout the year, in Spennithorne, there are 111.5 rainfall days, and 170mm (6.69") of precipitation is accumulated.Snowfall
May through October are months without snowfall in Spennithorne.Daylight
In September, the average length of the day in Spennithorne is 12h and 42min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:58 pm. On the last day of September, in Spennithorne, sunrise is at 7:08 am and sunset at 6:45 pm BST.
Sunshine
In September, the average sunshine in Spennithorne is 7.6h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Spennithorne?
What is the average humidity in September in Spennithorne?
How much does it rain in Spennithorne in September?
When it does not snow in Spennithorne?
How many hours of daylight does Spennithorne have in September?
What time are sunrise and sunset in September in Spennithorne?
How long on average sun shines in September in Spennithorne?
What are the months with the highest UV index in Spennithorne?
How high is the UV index in September in Spennithorne?
Average temperature in September
Spennithorne, United Kingdom
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (19.1°C).
The month with the lowest average high temperature is January (5.3°C).
- Average low temperature in September: 9.2°C
The month with the highest average low temperature is August (11.4°C).
The coldest month (with the lowest average low temperature) is January (1.1°C).
Average pressure in September
Spennithorne, United Kingdom
- Average pressure in September: 1015mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.5mbar).
Average wind speed in September
Spennithorne, United Kingdom
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is February (18km/h).
The calmest month (with the lowest average wind speed) is June (12.5km/h).
Average humidity in September
Spennithorne, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are November and December (89%).
The months with the lowest relative humidity are April, May and August (81%).
Average rainfall in September
Spennithorne, United Kingdom
- Average rainfall in September: 12mm
The wettest month (with the highest rainfall) is June (25mm).
The driest month (with the least rainfall) is April (6mm).
Average rainfall days in September
Spennithorne, United Kingdom
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Spennithorne, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (10mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Spennithorne, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Spennithorne, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is August (Average sunshine: 7h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).
Average sunshine days in September
Spennithorne, United Kingdom
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is September (20.1 days).
The month with the least sunshine days is July (14.1 days).
Average UV index in September
Spennithorne, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Spennithorne, United Kingdom
- Average cloud cover in September: 49
The month with the most cloud cover is November (Cloud cover 58).
The months with the least cloud cover are April and September (Cloud cover 49).
Average visibility in September
Spennithorne, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, August, October and December (9km).
The months with the lowest visibility are June, July, September and November (8km).
Spennithorne, United Kingdom
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