Daytime highs, nighttime lows and the warmest cities in County Antrim, Ireland this September.
County Antrim, Ireland, a region in Ireland, typically experiences mild weather in September, with maximum daytime temperatures around 17°C (63°F) and nighttime temperatures around 11°C (52°F) in Lisburn.
Discover the typical September temperatures for the most popular locations of County Antrim on the map below. Detailed insights are just a click away.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across County Antrim.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Pick a city to see its September weather averages.
Drill down to September weather for any region in Ireland.
Expect daytime temperatures around 17°C (63°F) in Lisburn. That makes September a moderate month for County Antrim, Ireland.
Average overnight lows in County Antrim, Ireland during September sit near 11°C (52°F) in Lisburn.
Most areas experience a moderate amount of sunshine, with approximately 109 hours of sunlight expected in Lisburn. This makes it neither too gloomy nor overly bright.
The water temperature averages approximately 13°C (55°F) in Belfast this month, so not the best month to swim.
We have much more information about the climate in County Antrim.
Weather and climate has detailed information for every country in the world. Are you going to Ireland? Get detailed historical weather averages for many cities in Ireland.
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