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 ushers in an average high-temperature of a refreshing 18°C (64.4°F), aligning closely with the preceding month. During September, an average low-temperature of 10°C (50°F) is observed in Cumnor.Humidity
In September, the average relative humidity in Cumnor is 82%.Rainfall
The months with the least rainfall are March and September Rain falls for 11.3 days and accumulates 18mm (0.71") of rain.Snowfall
April through November are months without snowfall in Cumnor.Daylight
In September, the average length of the day in Cumnor is 12h and 38min.On the first day of September in Cumnor, sunrise is at 6:18 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:44 pm BST.
Sunshine
The average sunshine in September is 7h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the average September temperature in Cumnor?
What is the average humidity in September in Cumnor?
What is the driest month in Cumnor?
How much does it rain in Cumnor in September?
When it does not snow in Cumnor?
How many hours of daylight does Cumnor have in September?
When is the sunrise / sunset in September in Cumnor?
How long on average sun shines in September in Cumnor?
What are the months with the highest UV index in Cumnor?
What is the UV index intensity in September in Cumnor?
Average temperature in September
Cumnor, United Kingdom
- Average high temperature in September: 18°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 10°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).
Average pressure in September
Cumnor, United Kingdom
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is May (1016.7mbar).
The month with the lowest atmospheric pressure is November (1010.2mbar).
Average wind speed in September
Cumnor, United Kingdom
- Average wind speed in September: 13.2km/h
The windiest month (with the highest average wind speed) is February (18.2km/h).
The calmest month (with the lowest average wind speed) is July (12.8km/h).
Average humidity in September
Cumnor, United Kingdom
- Average humidity in September: 82%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are July and August (80%).
Average rainfall in September
Cumnor, United Kingdom
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (36mm).
The driest months (with the least rainfall) are March and September (18mm).
Average rainfall days in September
Cumnor, United Kingdom
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is September (11.3 days).
Average snowfall in September
Cumnor, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Cumnor, 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
Cumnor, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is July (Average sunshine: 7h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Cumnor, United Kingdom
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Cumnor, 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, November and December (UV index 2).
Average cloud cover in September
Cumnor, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 51).
Average visibility in September
Cumnor, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, May, July, August, October and December (9km).
The months with the lowest visibility are April, June, September and November (8km).
Cumnor, United Kingdom
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