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
Caerphilly's September showcases an average high-temperature of a still comfortable 16.7°C (62.1°F), hardly distinct from August's 18.4°C (65.1°F). Throughout September, the nighttime temperature averages to a cool 10.7°C (51.3°F).Humidity
In September, the average relative humidity in Caerphilly is 85%.Rainfall
In Caerphilly, during September, the rain falls for 10.8 days and regularly aggregates up to 24mm (0.94") of precipitation. Throughout the year, in Caerphilly, there are 155.7 rainfall days, and 409mm (16.1") of precipitation is accumulated.Snowfall
In Caerphilly, snow does not fall in April through October.Daylight
In Caerphilly, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:59 pm. On the last day of September, in Caerphilly, sunrise is at 7:12 am and sunset at 6:52 pm BST.
Sunshine
In Caerphilly, the average sunshine in September is 7.1h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 4 during September leads to these instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Caerphilly?
What is the average humidity in September in Caerphilly?
How many days does it rain in September in Caerphilly?
When it does not snow in Caerphilly?
How many hours of daylight does Caerphilly have in September?
What time are sunrise and sunset in September in Caerphilly?
How many hours of sunshine does Caerphilly have in September?
When is the highest UV index in Caerphilly?
What is the UV index reading in September in Caerphilly?
Average temperature in September
Caerphilly, United Kingdom
- Average high temperature in September: 16.7°C
The warmest month (with the highest average high temperature) is July (18.9°C).
The month with the lowest average high temperature is January (7.2°C).
- Average low temperature in September: 10.7°C
The months with the highest average low temperature are July and August (12.5°C).
The coldest months (with the lowest average low temperature) are January and February (3.3°C).
Average pressure in September
Caerphilly, United Kingdom
- Average pressure in September: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in September
Caerphilly, United Kingdom
- Average wind speed in September: 15.6km/h
The windiest month (with the highest average wind speed) is February (21.5km/h).
The calmest months (with the lowest average wind speed) are June and July (14.6km/h).
Average humidity in September
Caerphilly, United Kingdom
- Average humidity in September: 85%
The months with the highest relative humidity are January, November and December (87%).
The months with the lowest relative humidity are April and May (82%).
Average rainfall in September
Caerphilly, United Kingdom
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is November (54mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Caerphilly, United Kingdom
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in September
Caerphilly, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (10mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Caerphilly, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Caerphilly, 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 1min
The months with the most sunshine are April, May and July (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in September
Caerphilly, United Kingdom
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Caerphilly, 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
Caerphilly, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is April (Cloud cover 47).
Average visibility in September
Caerphilly, 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).
