Ballymena Weather in September

Thinking of visiting Ballymena 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 Ballymena in September

On average, there are about 20 days with rain during this month, averaging 82 mm (3.2 in). 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 Ballymena in September

In September, Ballymena sees moderate temperatures, with highs of 17°C (63°F). Nights drop to 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 Ballymena in September

The month brings about 109 hours of sunlight, offering a comfortable mix of sun and overcast.

Wind Speed in Ballymena 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

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.

Should you favor a climate that's both dry and comfortably warm, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.