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Weather in September in County Antrim

Planning a journey to County Antrim this September and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What is the weather like in County Antrim in September?

County Antrim is a region in Ireland. September in County Antrim generally has mild temperatures, with moderate precipitation.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C and nighttime temperatures around 11°C in Lisburn.

Precipitation

September is a moderate rainy month with an average rainfall of around 79 mm in Lisburn.

Average sunshine

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.

For a closer look at September's conditions in County Antrim, see the map below. For a more detailed look at County Antrim's yearly weather, check out our County Antrim climate page.

Where to go in County Antrim in September

Find more information for the most popular destinations in the County Antrim on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 2 most popular destinations in County Antrim?

Lisburn

In September Lisburn generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 11°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Lisburn
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
139 hours 
90 mm 
18 days 
17°C 
11°C 
109 hours 
79 mm 
18 days 
October   >> October
>>  
14°C 
8°C 
85 hours 
93 mm 
20 days 
Climate in Lisburn

Belfast

In September Belfast generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 10°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Belfast
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
19°C 
12°C 
139 hours 
91 mm 
19 days 
17°C 
10°C 
109 hours 
77 mm 
19 days 
October   >> October
>>  
14°C 
8°C 
85 hours 
88 mm 
20 days 
Climate in Belfast

Is your destination not in the list? Have a look at other destinations in County Antrim, in Ireland.

Is September the best time to visit County Antrim?

In our opinion, September is a good time to visit County Antrim with overall tolerable weather in Lisburn. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, the best visiting conditions can be found in June, July and August offering mostly pleasant weather in Lisburn. On the other hand, the weather in January, February and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in County Antrim. Interested in the weather conditions in a specific month? Select the month below.

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  • 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.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.