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Weather in September in Antrim County

Planning a getaway to Antrim County this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What is the weather like in Antrim County in September?

Antrim County 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 and nighttime temperatures around 11°C in Belfast.

Precipitation

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

Average sunshine

The city Belfast usually sees around 109 hours of sunlight, indicating a moderately sunny period.

To learn more about the conditions in specific areas of Antrim County in September, check out the map below. For more details on the yearly weather, visit our Antrim County climate page.

Where to go in Antrim County in September

Find more information for the most popular destinations in the Antrim County 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 5 most popular destinations in Antrim County?

Belfast

In September Belfast 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.

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 
92 mm 
17 days 
17°C 
11°C 
109 hours 
83 mm 
17 days 
October   >> October
>>  
14°C 
9°C 
85 hours 
100 mm 
19 days 
Climate in Belfast

Portrush

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

Portrush
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
<<  
17°C 
13°C 
140 hours 
110 mm 
20 days 
16°C 
12°C 
118 hours 
108 mm 
20 days 
October   >> October
>>  
14°C 
10°C 
103 hours 
141 mm 
22 days 
Climate in Portrush

Bushmills

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

Bushmills
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
<<  
17°C 
13°C 
140 hours 
107 mm 
20 days 
16°C 
12°C 
118 hours 
107 mm 
20 days 
October   >> October
>>  
14°C 
10°C 
103 hours 
141 mm 
22 days 
Climate in Bushmills

Cushendall

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

Cushendall
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
<<  
18°C 
12°C 
139 hours 
103 mm 
19 days 
16°C 
11°C 
109 hours 
93 mm 
20 days 
October   >> October
>>  
14°C 
9°C 
85 hours 
120 mm 
21 days 
Climate in Cushendall

Ballycastle

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

Ballycastle
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
<<  
17°C 
13°C 
139 hours 
105 mm 
19 days 
16°C 
12°C 
109 hours 
105 mm 
20 days 
October   >> October
>>  
14°C 
10°C 
85 hours 
142 mm 
22 days 
Climate in Ballycastle

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

Is September the best time to visit Antrim County?

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

On average, the best time to visit Antrim County is in July and August with generally pleasant weather in Belfast. The weather in January, February, March and December, on the other hand, tends to be poor.

Interested in more climate information?

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