Antrim Weather in September

Thinking of visiting Antrim in September? Expect moderate temperatures reaching 17°C (63°F) during the day, dropping to 10°C (50°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Antrim in September

Records from the past 30 years suggest around 19 days of rain, with 77 mm (3 in) average for the month. Rain is frequent but mostly light this month, with brief showers more common than heavy downpours.

Temperature in Antrim in September

If you're visiting Antrim in September, expect highs of 17°C (63°F) and overnight lows around 10°C (50°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Antrim in September

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

Wind Speed in Antrim in September

September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in September

With water at 13°C (55°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July and August typically offer the best weather for Antrim.

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Check the conditions for any month of the year.

• January
• February
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• May
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• October
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For a detailed overview over the year and the best time to visit the United Kingdom, check out our Antrim's climate page.

Antrim Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 17°C (63°F)  

Water Temperature 13°C (55°F) *  

Chance of Rain 64%  

Precipitation 77 mm (3 in)  

Rainy days 19 days  

Humidity 91% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 109 hours *  

Percentage Sunshine 28% *  

* Data from: Belfast, Ireland (6 KM, 4 Miles).

What to Wear in Antrim in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. The water temperature sits at about 13°C (55°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Antrim in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

6/10

Walking

6/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Antrim's climate page.

More climate data for Antrim

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Antrim climate overview or explore weather in the United Kingdom.