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
September is marked by an average high-temperature of a moderate 15°C (59°F), almost identical to the preceding month. September registers an average low temperature of 11.9°C (53.4°F) in Donaghadee, subtly lower than the daytime maximum.Humidity
In September, the average relative humidity is 83%.Rainfall
In Donaghadee, United Kingdom, 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
In Donaghadee, snow does not fall in April through October.Sea temperature
With an average sea temperature of 14.3°C (57.7°F), September is the month with the warmest seawater.Note: Swimming in 14.3°C (57.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.
Daylight
In Donaghadee, the average length of the day in September 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. 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: A maximum daily UV index of 4 during September morphs into the following directions:
Take necessary precautions - Suggestions to elude sunburn are provided. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What are the temperatures in Donaghadee in September?
What is the average humidity in September in Donaghadee?
How many days does it rain in September in Donaghadee?
When it does not snow in Donaghadee?
What is the month with the warmest sea water in Donaghadee?
What is the water temperature in September in Donaghadee?
How many hours of daylight does Donaghadee have in September?
What time are sunrise and sunset in September in Donaghadee?
How many hours of sunshine does Donaghadee have in September?
What are the months with the highest UV index in Donaghadee?
How high is the UV index in September in Donaghadee?
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 4min
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 4min
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).
Donaghadee, United Kingdom
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