Randalstown Weather in September

September in Randalstown brings moderate temperatures, with daytime highs of 17°C (63°F) and nights around 10°C (50°F). Quite a bit of rainfall is expected, around 78 mm (3.1 in), so pack an umbrella.

Rainfall in Randalstown in September

Typically, you can expect about 19 days of rain this month, with 78 mm (3.1 in) on average. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.

Temperature in Randalstown in September

Daytime temperatures in Randalstown reach 17°C (63°F) in September, dropping to 10°C (50°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to around 10°C (50°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Randalstown in September

The area enjoys a balanced 109 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Wind Speed in Randalstown in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

Average water temperature in September

At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If your ideal day consists of dry skies and pleasant temperatures, July typically offers the best circumstances for Randalstown.