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 advent of September reveals an average high-temperature of an enjoyable 18.5°C (65.3°F), showing minimal difference from the prior month. In Bourn, September nights cool down to an average of 11.5°C (52.7°F).Humidity
The average relative humidity in September is 78%.Rainfall
In Bourn, in September, it is raining for 11.5 days, with typically 22mm (0.87") of accumulated precipitation. Throughout the year, in Bourn, United Kingdom, there are 173.6 rainfall days, and 381mm (15") of precipitation is accumulated.Snowfall
April through October are months without snowfall in Bourn.Daylight
In September, the average length of the day is 12h and 39min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:47 pm. On the last day of September, in Bourn, sunrise is at 7:00 am and sunset at 6:39 pm BST.
Sunshine
The average sunshine in September in Bourn is 7.1h.UV index
In September, the average daily maximum UV index in Bourn is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average UV index of 4 in September transforms into this advice:
Take precautions - Protection against skin and eye damage is obliged. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Bourn?
What is the average humidity in September in Bourn?
How much does it rain in Bourn in September?
When it does not snow in Bourn?
What is the average length of the day in September in Bourn?
When is the sunrise / sunset in September in Bourn?
How many hours of sunshine does Bourn have in September?
What is the UV index reading in September in Bourn?
Average temperature in September
Bourn, United Kingdom
- Average high temperature in September: 18.5°C
The warmest months (with the highest average high temperature) are July and August (21.3°C).
The month with the lowest average high temperature is January (5.9°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).
Average pressure in September
Bourn, United Kingdom
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).
Average wind speed in September
Bourn, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.5km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in September
Bourn, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (90%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Bourn, United Kingdom
- Average rainfall in September: 22mm
The wettest month (with the highest rainfall) is June (48mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Bourn, United Kingdom
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is September (11.5 days).
Average snowfall in September
Bourn, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (23mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Bourn, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 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
Bourn, 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 1min
The month with the most sunshine is August (Average sunshine: 8h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Bourn, United Kingdom
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (15.5 days).
The month with the least sunshine days is June (8.1 days).
Average UV index in September
Bourn, 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
Bourn, United Kingdom
- Average cloud cover in September: 48
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 48).
Average visibility in September
Bourn, 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).
Bourn, United Kingdom
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