Ballyclare Weather in September
What's the weather like in Ballyclare (N Ireland) in September 2025?
The climate in Ballyclare during September can be summarized as mild and damp.
September is in the fall / autumn in Ballyclare and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 8°C (47°F) is normal.
| Daytime temperature | 15.2°C 59.3°F |
|---|---|
| Nightly temperature | 8.3°C 46.9°F |
| Average temperature | 11.7°C 53.1°F |
| Daily sunshine | 4 hrs |
| Avg rainfall | 104 mm 4.1 ins |
| Rainy days | 19 days |
| Sea temperature | 14.6°C 58.3°F |
| Humidity | 90% |
| Windspeed | 19.4kph 12 mph |
On average September is the 3rd wettest month of the year in Ballyclare with around 104mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 4 hours of sunshine per day.
September temperatures in Ballyclare
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ballyclare in September 2025.
Other monthly averages
Best places to visit in September
Ballyclare weather stats
| Hottest month: | July | 17.4°C 63.3°F |
|---|---|---|
| Driest month: | April | 66mm 2.6ins |
| Sunniest month: | May | 6.4hrs |
| Coldest month: | January | 5.9°C 42.6°F |
| Wettest month: | October | 110mm 4.3ins |
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