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 brings an average high-temperature of a still comfortable 16.2°C (61.2°F), exhibiting minor difference from the previous month. Carmarthen maintains a consistent average nighttime low-temperature of 11.4°C (52.5°F) throughout September.Humidity
In September, the average relative humidity is 85%.Rainfall
In Carmarthen, in September, it is raining for 15.8 days, with typically 41mm (1.61") of accumulated precipitation. Throughout the year, there are 210.2 rainfall days, and 515mm (20.28") of precipitation is accumulated.Snowfall
In Carmarthen, United Kingdom, snow does not fall in March through October.Daylight
In Carmarthen, United Kingdom, the average length of the day in September is 12h and 39min.On the first day of September, sunrise is at 6:30 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 6:56 pm BST.
Sunshine
In September, the average sunshine is 6.8h.UV index
The months with the highest UV index in Carmarthen 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 the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Frequently asked questions
What are September temperatures in Carmarthen?
What is the average humidity in September in Carmarthen?
How much does it rain in Carmarthen in September?
When it does not snow in Carmarthen?
How many hours of daylight does Carmarthen have in September?
When is the sunrise / sunset in September in Carmarthen?
How long on average sun shines in September in Carmarthen?
When is the highest UV index in Carmarthen?
How high is the UV index in September in Carmarthen?
Average temperature in September
Carmarthen, United Kingdom
- Average high temperature in September: 16.2°C
The warmest month (with the highest average high temperature) is July (17.9°C).
The month with the lowest average high temperature is February (7.6°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in September
Carmarthen, United Kingdom
- Average pressure in September: 1016.6mbar
The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.6mbar).
Average wind speed in September
Carmarthen, United Kingdom
- Average wind speed in September: 16.9km/h
The windiest month (with the highest average wind speed) is December (22.3km/h).
The calmest month (with the lowest average wind speed) is June (14.5km/h).
Average humidity in September
Carmarthen, United Kingdom
- Average humidity in September: 85%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and May (82%).
Average rainfall in September
Carmarthen, United Kingdom
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is November (60mm).
The driest month (with the least rainfall) is May (24mm).
Average rainfall days in September
Carmarthen, United Kingdom
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is December (20.6 days).
The month with the least rainy days is April (13.5 days).
Average snowfall in September
Carmarthen, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (7mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Carmarthen, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
Carmarthen, 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 5min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
Carmarthen, United Kingdom
- Average sunshine days in September: 10 days
The month with the most sunshine days is March (13.2 days).
The month with the least sunshine days is August (6.3 days).
Average UV index in September
Carmarthen, 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
Carmarthen, United Kingdom
- Average cloud cover in September: 52
The month with the most cloud cover is December (Cloud cover 64).
The months with the least cloud cover are April and May (Cloud cover 48).
Average visibility in September
Carmarthen, 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).
Carmarthen, United Kingdom
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