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
Hirwaun, United Kingdom, starts September with an average high-temperature of a still refreshing 16.2°C (61.2°F), hinting at a minimal fluctuation from August. The nighttime temperature dips to a chilly 9.9°C (49.8°F) on average during September.Humidity
In September, the average relative humidity is 87%.Rainfall
In September, the rain falls for 15.5 days. Throughout September, 41mm (1.61") of precipitation is accumulated. In Hirwaun, United Kingdom, during the entire year, the rain falls for 200.8 days and collects up to 659mm (25.94") of precipitation.Snowfall
In Hirwaun, United Kingdom, snow does not fall in May through October.Daylight
In Hirwaun, the average length of the day in September is 12h and 38min.On the first day of September in Hirwaun, sunrise is at 6:27 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:53 pm BST.
Sunshine
In September, the average sunshine in Hirwaun is 6.3h.UV index
In Hirwaun, United Kingdom, 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 unsafe exposure to UV radiation for the average person.Note: An average UV index of 3 in September transforms into this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What is the temperature in September in Hirwaun?
What is the average humidity in September in Hirwaun?
How many days does it rain in September in Hirwaun?
When it does not snow in Hirwaun?
What is the average length of the day in September in Hirwaun?
What time are sunrise and sunset in September in Hirwaun?
How long on average sun shines in September in Hirwaun?
How high is the UV index in September in Hirwaun?
Average temperature in September
Hirwaun, United Kingdom
- Average high temperature in September: 16.2°C
The warmest month (with the highest average high temperature) is July (18.3°C).
The month with the lowest average high temperature is January (6.6°C).
- Average low temperature in September: 9.9°C
The month with the highest average low temperature is August (12°C).
The coldest month (with the lowest average low temperature) is January (2.6°C).
Average pressure in September
Hirwaun, 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 (1009.8mbar).
Average wind speed in September
Hirwaun, United Kingdom
- Average wind speed in September: 15.1km/h
The windiest month (with the highest average wind speed) is February (20.9km/h).
The calmest months (with the lowest average wind speed) are June and July (14.2km/h).
Average humidity in September
Hirwaun, United Kingdom
- Average humidity in September: 87%
The months with the highest relative humidity are January, November and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Hirwaun, United Kingdom
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is November (81mm).
The driest month (with the least rainfall) is May (34mm).
Average rainfall days in September
Hirwaun, United Kingdom
- Average rainfall days in September: 15.5 days
The months with the highest number of rainy days are August and November (19.4 days).
The month with the least rainy days is February (13.3 days).
Average snowfall in September
Hirwaun, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Hirwaun, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Hirwaun, 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: 6h and 2min
The months with the most sunshine are April and May (Average sunshine: 7h and 24min).
The months with the least sunshine are January, February, November and December (Average sunshine: 3h and 30min).
Average sunshine days in September
Hirwaun, United Kingdom
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is April (12.9 days).
The month with the least sunshine days is November (7.2 days).
Average UV index in September
Hirwaun, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (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
Hirwaun, United Kingdom
- Average cloud cover in September: 57
The month with the most cloud cover is November (Cloud cover 67).
The months with the least cloud cover are April and May (Cloud cover 52).
Average visibility in September
Hirwaun, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, October, November and December (9km).
The months with the lowest visibility are July, August and September (8km).
Hirwaun, United Kingdom
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