Greenock Weather & Climate: Best Time to Visit

The climate in Greenock 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 8°C (46°F) in December.

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

Check out our detailed temperature page for more information.

Temperature ranges by month

Greenock has a notably wet climate with abundant precipitation, recording 1716 mm (68 in) of rain/snowfall per year. The wettest period in Greenock occurs in January, which receives around 177 mm (7 in) of precipitation. During the driest month, April, Greenock experiences high rainfall, totaling 109 mm (4.3 in). The consistent precipitation levels throughout the year contribute to a relatively stable climate. For more details, please visit our Greenock Precipitation page.

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

The average number of days each month with precipitation

In Greenock, summer days are longer and more sunny, with daily sunshine hours peaking at 6.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 1.2 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 relative humidity is high throughout the year in Greenock.

The city experiences its highest humidity in January, reaching 87%. In May, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year