Antrim County Weather in September

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

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Belfast Portrush Bushmills Cushendall

Considering a trip to Antrim County, the United Kingdom this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Antrim County in September

Antrim County, the United Kingdom is a region in the United Kingdom. September in Antrim County generally has mild temperatures, with precipitation levels ranging from moderate to high. During September, summer is in full swing.

Temperatures

You can expect mild maximum daytime temperatures of around 17°C (63°F) and nighttime temperatures around 11°C (52°F) in Belfast.

To explore the conditions in Antrim County, the United Kingdom in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Aghalee with an average of 75 mm (3 in) to high rainfall in Portrush with 108 mm (4.3 in).

Average sunshine

Sunshine is fairly consistent across many areas. Belfast receives about 109 hours of sunlight in September, providing a good balance between sunny spells and cloud cover. If you're after more sunshine hours, take a look at our weather planner for other sun-rich destinations worldwide.

Explore Antrim County by month

Pick a month to see the average temperature, rainfall and sunshine in Antrim County - and find the best time to visit. (based on Belfast)

January9°C (48°F) February9°C (48°F) March10°C (50°F) April12°C (54°F) May15°C (59°F) June17°C (63°F) This monthJuly19°C (66°F) August19°C (66°F) September17°C (63°F) October14°C (57°F) November11°C (52°F) December9°C (48°F)
Best Time to Visit Antrim County →

Best Places to Visit in Antrim County in September

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

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 Antrim County

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

Temperature range in Antrim County (September)

Precipitation variation in Antrim County (September)

Belfast

In September Belfast 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 good 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)
9°C (48°F)
Monthly sun hours
139 hours
109 hours
85 hours
Monthly rainfall
92 mm (3.6 in)
83 mm (3.3 in)
100 mm (3.9 in)
Monthly rainy days
17 days
17 days
19 days
Weather conditions
very good
good
mixed
Climate in Belfast →

Portrush

In September Portrush generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 12°C (54°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
110 mm (4.3 in)
108 mm (4.3 in)
141 mm (5.6 in)
Monthly rainy days
20 days
20 days
22 days
Weather conditions
mixed
mixed
mixed
Climate in Portrush →

Bushmills

In September Bushmills generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 12°C (54°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
140 hours
118 hours
103 hours
Monthly rainfall
107 mm (4.2 in)
107 mm (4.2 in)
141 mm (5.6 in)
Monthly rainy days
20 days
20 days
22 days
Weather conditions
mixed
mixed
mixed
Climate in Bushmills →

Cushendall

In September Cushendall generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 11°C (52°F) and moderate monthly rainfall. So on average the conditions are good that month.

« August
September
October »
August
September
October
Max temperature
18°C (64°F)
16°C (61°F)
14°C (57°F)
Min temperature
12°C (54°F)
11°C (52°F)
9°C (48°F)
Monthly sun hours
139 hours
109 hours
85 hours
Monthly rainfall
103 mm (4.1 in)
93 mm (3.7 in)
120 mm (4.7 in)
Monthly rainy days
19 days
20 days
21 days
Weather conditions
good
good
mixed
Climate in Cushendall →

Ballycastle

In September Ballycastle generally has moderate temperatures with maximum daytime temperatures around 16°C (61°F), minimum nighttime temperatures around 12°C (54°F) and high monthly rainfall. So on average the conditions are mixed that month.

« August
September
October »
August
September
October
Max temperature
17°C (63°F)
16°C (61°F)
14°C (57°F)
Min temperature
13°C (55°F)
12°C (54°F)
10°C (50°F)
Monthly sun hours
139 hours
109 hours
85 hours
Monthly rainfall
105 mm (4.1 in)
105 mm (4.1 in)
142 mm (5.6 in)
Monthly rainy days
19 days
20 days
22 days
Weather conditions
mixed
mixed
mixed
Climate in Ballycastle →

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

Popular cities in September

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

City Weather Day temp Night temp Rainfall
Belfast 17°C (63°F) 11°C (52°F) 83 mm (3.3 in)
Portrush 16°C (61°F) 12°C (54°F) 108 mm (4.3 in)
Bushmills 16°C (61°F) 12°C (54°F) 107 mm (4.2 in)
Cushendall 16°C (61°F) 11°C (52°F) 93 mm (3.7 in)
Ballycastle 16°C (61°F) 12°C (54°F) 105 mm (4.1 in)
Ballymoney 17°C (63°F) 11°C (52°F) 96 mm (3.8 in)

Antrim County weather in September: frequently asked questions

What is the weather like in Antrim County, the United Kingdom in September?

September in Antrim County, the United Kingdom brings good weather. In Belfast, daytime temperatures are typically around 17°C (63°F) and nighttime lows hover near 11°C (52°F).

What is the average temperature in Antrim County, the United Kingdom in September?

In Belfast, the average daytime high in September is 17°C (63°F), while nighttime temperatures drop to around 11°C (52°F).

Does Antrim County, the United Kingdom get a lot of rain in September?

Not particularly. Belfast averages just 83 mm (3.3 in) of rain in September, making it a mostly dry month for Antrim County, the United Kingdom.

Is September a Good Time to Visit Antrim County, the United Kingdom?

Given the typically good weather conditions in Belfast, September might be a good time to visit Antrim County, the United Kingdom. However, the weather conditions may vary depending on your destination.

On average, the best time to visit Antrim County, the United Kingdom is in July and August with generally very good weather in Belfast. The weather in January, February, March and December, on the other hand, tends to be less favorable.

Interested in more climate information?

We have much more information about the climate in Antrim County.

Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed historical weather averages for many cities in the United Kingdom.

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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