Randalstown Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Randalstown.
Climate overview of Randalstown
The climate in Randalstown, Antrim County, United Kingdom, sees a moderate range of temperatures across the year, from 20°C (68°F) in July down to 9°C (48°F) in January.
Annual rain/snowfall is moderate at around 986 mm (39 in), with August being the wettest month. The city also has pleasant summers and cold winters. The most sunshine falls in May, with an average of 6.1 hours of daily sunshine.
Randalstown Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Randalstown - and find the best time to visit.
Monthly Temperature in Randalstown
The climate in Randalstown experiences moderate temperature changes, with mild shifts between seasons. Average daytime temperatures reach a pleasant 20°C (68°F) in July. In January, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 12°C (54°F) in July to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Randalstown
On average, Randalstown receives a reasonable amount of rain/snowfall, with an annual precipitation of 986 mm (39 in). Despite minor fluctuations, Randalstown enjoys fairly consistent precipitation throughout the year. In August, you can expect around 94 mm (3.7 in) of precipitation, while in March, Randalstown receives about 70 mm (2.8 in). For more details, please visit our Randalstown 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 Randalstown
Randalstown can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Randalstown
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 Randalstown 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 Randalstown
The mean wind speed over the year ranges from 4 m/s (8 knots) in April, May, June, July, August and September to 5 m/s (10 knots) 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 Randalstown
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: July
- Warmest weather: June, July and August
- Most sunshine: May
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Randalstown
What is the best time to visit Randalstown?
July typically offers the most optimal weather in Randalstown. In contrast, January, February and December tend to have less optimal conditions. Randalstown has pleasant summers and cold winters.
What temperatures can I expect in Randalstown?
Daytime highs range from 9°C (48°F) in January to 20°C (68°F) in July. Nighttime lows range from 3°C (37°F) to 12°C (54°F).
How much rain does Randalstown get?
Annual rainfall is around 986 mm (39 in). August is the wettest month with 94 mm (3.7 in), while March is the driest with 70 mm (2.8 in).
How sunny is Randalstown?
Randalstown 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.
Randalstown 3-Day Forecast
Randalstown on the map
Randalstown is highlighted - select any city to see its climate.
Popular this month
Where to go in September - average daytime high across popular destinations.
London
20°C (68°F) Bath19°C (66°F) Torquay19°C (66°F) Manchester
18°C (64°F) York19°C (66°F) Edinburgh17°C (63°F) Blackpool17°C (63°F) Glasgow17°C (63°F) 
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