Day
16 °C
Night
10 °C
Sea
14 °C
Precipitation
87 mm
in month
Rainy days
15 days
in month
Daylight
13 hours
average
Sunshine
4 hours
average
Humidity
89 %
We make the most from 40 years of historical weather data to predict the best weather conditions.
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In September in Northern Ireland, the average air temperature ranges from 16 °C (61 °F) during the day to 10 °C (49 °F) at night. There are 15 days of rain on average, where the rainfall is 87 mm (3.43 in).
Northern Ireland can be visited in September - the weather will be moderate. A relatively low temperature of 16 °C (61 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The temperature of 10 °C (49 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
In September in Northern Ireland, the average daily temperatures will be 16 °C (61 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
In Northern Ireland in September, there is 87 mm (3.43 in) rainfall, which means on average 3 mm (0.11 in) rainfall per day.
In September in Northern Ireland, we can expect 15 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 3.6 days of the week, or in general - 52 % days.
No, September in Northern Ireland is not a rainier month than August.
The average night temperature in Northern Ireland in September is 10 °C (49 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
In September in Northern Ireland, you can expect around 4 hours of sunshine.
No, September is not warmer in Northern Ireland than August.
In Northern Ireland in September, expect humidity around 89 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.
The length of daylight in Northern Ireland in September is 13 hours.
During September in Northern Ireland, the day temperatures are decreasing - from 17 °C (63 °F) at the beginning of the month to 15 °C (58 °F) at the end of the month.
In September in Northern Ireland, there will be an average wind scale of 5.