Ballymena Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ballymena.
Climate overview of Ballymena
Ballymena, Antrim County, United Kingdom, experiences moderate temperature changes through the seasons. July is the warmest month with daytime highs of 19°C (66°F), while January is the coolest at 9°C (48°F).
The city receives considerable rainfall, with around 1045 mm (41 in) annually. August is the wettest month. It has pleasant summers and cold winters. May is the sunniest month, averaging 6.1 hours of sunshine per day.
Ballymena Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ballymena - and find the best time to visit.
Monthly Temperature in Ballymena
In Ballymena, seasonal changes bring about a moderate variation in temperatures. Typically, average maximum daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 9°C (48°F) in the coolest month, January.
Nights vary from 12°C (54°F) in July to around 3°C (37°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ballymena
Ballymena has a relatively rainy climate with high precipitation levels, averaging 1045 mm (41 in) of rainfall annually. Precipitation levels in Ballymena remain relatively steady throughout the year. August has the most rain, with 98 mm (3.9 in) over 19 days. In the driest month March, this drops slightly to 73 mm (2.9 in), making the city's climate fairly predictable. For more details, please visit our Ballymena Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Ballymena
For those who appreciate different seasons, Ballymena serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 6.1 hours of sunshine daily, and embrace the darker days in December, offering only 1.3 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Ballymena
The mean water temperature over the year ranges from 7°C (45°F) in February to 13°C (55°F) in August.
Water temperature over the year
Humidity in Ballymena by Month
The city experiences its highest humidity in September, reaching 91%. In February, the humidity drops to its lowest level at 86%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Ballymena
The average wind speed over the year ranges from 4 m/s (8 knots) to 5 m/s (10 knots). It is lower in April, May, June, July, August and September and higher in January, February, March, October, November and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Ballymena
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July and August
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Ballymena
What is the best time to visit Ballymena?
July and August typically offer the most optimal weather in Ballymena. In contrast, January, February, March and December tend to have less optimal conditions. Ballymena has pleasant summers and cold winters.
What temperatures can I expect in Ballymena?
Daytime highs range from 9°C (48°F) in January to 19°C (66°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Ballymena get?
Annual rainfall is around 1045 mm (41 in). August is the wettest month with 98 mm (3.9 in), while March is the driest with 73 mm (2.9 in).
How sunny is Ballymena?
Ballymena receives around 1,297 hours of sunshine per year. May is the sunniest month with 184 hours, while December is the cloudiest with just 39 hours.
Ballymena 3-Day Forecast
Ballymena on the map
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