County Antrim Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in County Antrim, Ireland in September.

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Lisburn Belfast

Planning a trip to County Antrim, Ireland this September? Here's what you need to know about the weather:

What to Expect in County Antrim in September

County Antrim, Ireland 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 (63°F) and nighttime temperatures around 11°C (52°F) in Lisburn.

To learn more about the conditions in specific areas of County Antrim, Ireland, check out the map below.

Precipitation

September is a moderate rainy month with an average rainfall of around 79 mm (3.1 in) in Lisburn.

Average sunshine

Sunshine amounts are decent in most places. Lisburn gets approximately 109 hours of sunlight in September, offering a reasonable amount of both bright and cloudy periods. Curious about sunnier destinations? Our weather planner makes it easy to find places worldwide with pleasant weather.

Explore County Antrim by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Best Places to Visit in County Antrim in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across County Antrim.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in County Antrim

What is the weather like in September for some of the most popular destinations in County Antrim, Ireland?

Temperature range in County Antrim (September)

Precipitation variation in County Antrim (September)

Lisburn

In September Lisburn generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
11°C (52°F)
8°C (46°F)
Monthly sun hours
139 hours
109 hours
85 hours
Monthly rainfall
90 mm (3.5 in)
79 mm (3.1 in)
93 mm (3.7 in)
Monthly rainy days
18 days
18 days
20 days
Weather conditions
pleasant
tolerable
tolerable
Climate in Lisburn →

Belfast

In September Belfast generally has moderate temperatures with maximum daytime temperatures around 17°C (63°F), minimum nighttime temperatures around 10°C (50°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

« August
September
October »
August
September
October
Max temperature
19°C (66°F)
17°C (63°F)
14°C (57°F)
Min temperature
12°C (54°F)
10°C (50°F)
8°C (46°F)
Monthly sun hours
139 hours
109 hours
85 hours
Monthly rainfall
91 mm (3.6 in)
77 mm (3 in)
88 mm (3.5 in)
Monthly rainy days
19 days
19 days
20 days
Weather conditions
pleasant
tolerable
tolerable
Climate in Belfast →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in County Antrim in September.

City Weather Day temp Night temp Rainfall
Lisburn 17°C (63°F) 11°C (52°F) 79 mm (3.1 in)
Belfast 17°C (63°F) 10°C (50°F) 77 mm (3 in)

County Antrim weather in September: frequently asked questions

What is the weather like in County Antrim, Ireland in September?

Expect tolerable weather across County Antrim, Ireland in September. The popular destination of Lisburn averages 17°C (63°F) by day and 11°C (52°F) at night during this month.

What is the average temperature in County Antrim, Ireland in September?

Daytime temperatures in Lisburn peak at roughly 17°C (63°F) in September, dropping to about 11°C (52°F) overnight.

Does County Antrim, Ireland get a lot of rain in September?

Rain is generally moderate to light in County Antrim, Ireland during September, with Lisburn averaging close to 79 mm (3.1 in).

Is September a Good Time to Visit County Antrim, Ireland?

In our opinion, September is a good time to visit County Antrim, Ireland 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.

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.

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