September weather forecastDonaghadee, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Donaghadee, United Kingdom, with an average temperature varying between 11.9°C (53.4°F) and 15°C (59°F).Temperature
September's arrival brings an average high-temperature of a moderate 15°C (59°F), slightly deviating from August's 16°C (60.8°F). Donaghadee's September nights observe a minor shift from the daytime temperatures, resulting in an average dip to a fresh 11.9°C (53.4°F).Humidity
In Donaghadee, the average relative humidity in September is 83%.Rainfall
In Donaghadee, in September, during 16.1 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, in Donaghadee, there are 213 rainfall days, and 602mm (23.7") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Sea temperature
September is the month with the warmest seawater, with an average sea temperature of 14.3°C (57.7°F).Note: Swimming in 14.3°C (57.7°F) at temperatures under 10°C (50°F) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 13°C (55.4°F) feels frosty.
Daylight
In September, the average length of the day is 12h and 43min.On the first day of September, sunrise is at 6:30 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:00 pm BST.
Sunshine
The average sunshine in September is 6.7h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index in Donaghadee. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Donaghadee, United Kingdom
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is July (16.2°C).
The month with the lowest average high temperature is February (7.3°C).
- Average low temperature in September: 11.9°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 (4.6°C).
Average pressure in September
Donaghadee, United Kingdom
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1007.3mbar).
Average wind speed in September
Donaghadee, United Kingdom
- Average wind speed in September: 22km/h
The windiest month (with the highest average wind speed) is December (28km/h).
The calmest month (with the lowest average wind speed) is June (16.7km/h).
Average humidity in September
Donaghadee, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are July and August (85%).
The months with the lowest relative humidity are March, April, May and November (81%).
Average rainfall in September
Donaghadee, United Kingdom
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is May (33mm).
Average rainfall days in September
Donaghadee, United Kingdom
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is August (21.5 days).
The month with the least rainy days is April (15 days).
Average snowfall in September
Donaghadee, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is March (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Donaghadee, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Donaghadee, United Kingdom
- Average sea temperature in September: 14.3°C
The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).
Average daylight in September /
Average sunshine in September
Donaghadee, United Kingdom
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 6h and 42min
The month with the most sunshine is June (Average sunshine: 8h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in September
Donaghadee, United Kingdom
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is April (12.3 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in September
Donaghadee, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Donaghadee, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 51).
Average visibility in September
Donaghadee, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, April, September, October, November and December (10km).
The months with the lowest visibility are January, February, May, June, July and August (9km).
