Holywood Weather & Climate: Best Time to Visit

The climate in Holywood is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a pleasant 19°C (66°F) in July to a chilly 7°C (45°F) in January.

Nighttime temperatures range from 11°C (52°F) in July to 2°C (36°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Holywood has a notably wet climate with abundant precipitation, recording 1250 mm (49 in) of rain/snowfall per year. The wettest period in Holywood occurs in December, which receives around 124 mm (4.9 in) of precipitation. During the driest month, April, Holywood experiences moderate rainfall, totaling 84 mm (3.3 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Holywood Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

In Holywood, summer days are longer and more sunny, with daily sunshine hours peaking at 5.4 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 1.3 hours per average day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The city experiences its highest humidity in December, reaching 90%. In May, the humidity drops to its lowest level at 70%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year