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 sea temperature 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
Upon the beginning of September, Conwy's high-temperatures register at a mild 15.3°C (59.5°F), closely mirroring the preceding month. An average temperature of 11.5°C (52.7°F) is logged during the nights of September, a small step down from daytime highs.Humidity
The average relative humidity in September in Conwy is 84%.Rainfall
In Conwy, during September, the rain falls for 17.9 days and regularly aggregates up to 45mm (1.77") of precipitation. In Conwy, United Kingdom, during the entire year, the rain falls for 228.5 days and collects up to 604mm (23.78") of precipitation.Snowfall
May through October are months without snowfall.Sea temperature
In Conwy, the average seawater temperature in September is 16°C (60.8°F).Note: In water with a temperature of 16°C (60.8°F), most people do not enjoy swimming. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing becomes increasingly difficult to control.
Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 6:25 am and sunset at 8:04 pm. On the last day of September, in Conwy, United Kingdom, sunrise is at 7:16 am and sunset at 6:54 pm BST.
Sunshine
The average sunshine in September in Conwy is 6.5h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Conwy. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 suggests this advice:
Guard yourself - Avoiding sunburn is suggested. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What is the average September temperature in Conwy?
What is the average humidity in September in Conwy?
How many days does it rain in September in Conwy?
When it does not snow in Conwy?
What is the sea water temperature in September in Conwy?
How many hours of daylight does Conwy have in September?
When is the sunrise / sunset in September in Conwy?
How many hours of sunshine does Conwy have in September?
When is the highest UV index in Conwy?
What is the UV index reading in September in Conwy?
Average temperature in September
Conwy, United Kingdom
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in September
Conwy, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.8mbar).
Average wind speed in September
Conwy, United Kingdom
- Average wind speed in September: 17.9km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is June (14.4km/h).
Average humidity in September
Conwy, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are January and August (85%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Conwy, United Kingdom
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is May (31mm).
Average rainfall days in September
Conwy, United Kingdom
- Average rainfall days in September: 17.9 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is February (15.8 days).
Average snowfall in September
Conwy, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Conwy, 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 sea temperature in September
Conwy, United Kingdom
- Average sea temperature in September: 16°C
The best month for swimming (with the highest average sea temperature) is August (16.3°C).
The coldest months (with the lowest average sea temperature) are February and March (7.7°C).
Average daylight in September /
Average sunshine in September
Conwy, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 6h and 3min
The months with the most sunshine are May and June (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Conwy, United Kingdom
- Average sunshine days in September: 8.5 days
The months with the most sunshine days are March and May (11 days).
The month with the least sunshine days is November (5.2 days).
Average UV index in September
Conwy, 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
Conwy, United Kingdom
- Average cloud cover in September: 55
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility in September
Conwy, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, August, November and December (9km).
Conwy, United Kingdom
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