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
September's beginning signals an average high-temperature of an enjoyable 18.5°C (65.3°F), barely different from August's 21.1°C (70°F). During September, Blackham records an average temperature of 11.6°C (52.9°F) at night.Humidity
In September, the average relative humidity in Blackham is 79%.Rainfall
In Blackham, during September, the rain falls for 10.2 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, there are 160.6 rainfall days, and 372mm (14.65") of precipitation is accumulated.Snowfall
In Blackham, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 38min.On the first day of September in Blackham, United Kingdom, sunrise is at 6:13 am and sunset at 7:44 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:39 pm BST.
Sunshine
In Blackham, the average sunshine in September is 7.8h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Undertake protective steps - Recommendations to avoid sunburn are issued. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit 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 Blackham?
What is the average humidity in September in Blackham?
How many days does it rain in September in Blackham?
When it does not snow in Blackham?
How many hours of daylight does Blackham have in September?
When are sunrise and sunset in September in Blackham?
How many hours of sunshine does Blackham have in September?
How high is the UV index in September in Blackham?
Average temperature in September
Blackham, United Kingdom
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (21.1°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in September: 11.6°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 (2.6°C).
Average pressure in September
Blackham, United Kingdom
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1010.9mbar).
Average wind speed in September
Blackham, United Kingdom
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is February (18.8km/h).
The calmest month (with the lowest average wind speed) is July (13.7km/h).
Average humidity in September
Blackham, United Kingdom
- Average humidity in September: 79%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Blackham, United Kingdom
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Blackham, United Kingdom
- Average rainfall days in September: 10.2 days
The month with the highest number of rainy days is November (16 days).
The month with the least rainy days is September (10.2 days).
Average snowfall in September
Blackham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Blackham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.5 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
Blackham, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 7h and 5min
The months with the most sunshine are July and August (Average sunshine: 8h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Blackham, United Kingdom
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is September (16.5 days).
The month with the least sunshine days is November (11.5 days).
Average UV index in September
Blackham, 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
Blackham, United Kingdom
- Average cloud cover in September: 44
The month with the most cloud cover is February (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 44).
Average visibility in September
Blackham, 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).
