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
With the onset of September, Trefeglwys's average high-temperature clocks in at a moderate 15.3°C (59.5°F), showing a minor fluctuation from the previous month. September generally records an average low-temperature of 8.1°C (46.6°F).Humidity
The average relative humidity in September is 90%.Rainfall
The month with the least rainfall is September, when the rain falls for 13.2 days and typically collects 34mm (1.34") of precipitation.Snowfall
June through October are months without snowfall.Daylight
In Trefeglwys, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:26 am and sunset at 8:01 pm. On the last day of September, in Trefeglwys, sunrise is at 7:14 am and sunset at 6:53 pm BST.
Sunshine
In Trefeglwys, the average sunshine in September is 5.4h.UV index
In Trefeglwys, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 3 during September translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Trefeglwys in September?
What is the average humidity in September in Trefeglwys?
What is the driest month in Trefeglwys?
How much does it rain in Trefeglwys in September?
When it does not snow in Trefeglwys?
What is the average length of the day in September in Trefeglwys?
When is the sunrise / sunset in September in Trefeglwys?
How many hours of sunshine does Trefeglwys have in September?
What is the UV index reading in September in Trefeglwys?
Average temperature in September
Trefeglwys, United Kingdom
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (17.7°C).
The month with the lowest average high temperature is January (5.3°C).
- Average low temperature in September: 8.1°C
The month with the highest average low temperature is August (10.2°C).
The coldest months (with the lowest average low temperature) are January and February (0.8°C).
Average pressure in September
Trefeglwys, United Kingdom
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.5mbar).
Average wind speed in September
Trefeglwys, United Kingdom
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is February (18.9km/h).
The calmest month (with the lowest average wind speed) is June (12.6km/h).
Average humidity in September
Trefeglwys, United Kingdom
- Average humidity in September: 90%
The months with the highest relative humidity are November and December (92%).
The months with the lowest relative humidity are April and May (85%).
Average rainfall in September
Trefeglwys, United Kingdom
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is June (68mm).
The driest month (with the least rainfall) is September (34mm).
Average rainfall days in September
Trefeglwys, United Kingdom
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is February (11.5 days).
Average snowfall in September
Trefeglwys, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (67mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Trefeglwys, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Trefeglwys, 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: 5h and 2min
The month with the most sunshine is May (Average sunshine: 6h and 24min).
The month with the least sunshine is November (Average sunshine: 2h and 54min).
Average sunshine days in September
Trefeglwys, United Kingdom
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is September (13.4 days).
The month with the least sunshine days is July (8.4 days).
Average UV index in September
Trefeglwys, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in September
Trefeglwys, United Kingdom
- Average cloud cover in September: 65
The month with the most cloud cover is November (Cloud cover 72).
The months with the least cloud cover are April and May (Cloud cover 60).
Average visibility in September
Trefeglwys, United Kingdom
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April, May, June, July, November and December (8km).
The months with the lowest visibility are August, September and October (7km).
