Dumbarton Sunshine Hours by Month

Sunshine is key to understanding how a place experiences its seasons. This page shows the total number of hours of direct sunlight per month and the average hours per day in Dumbarton, Strathclyde, United Kingdom. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020.

Monthly hours of sunshine

Those who love seasonal contrasts will appreciate Dumbarton. Expect long, bright days with 188 hours in May and darker periods with just 37 hours in January. The total annual amount of sun is 1290 hours.

Daily hours of sunshine

This means the city can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.3 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 1.2 hours of sunlight per day.

Average percent of sunshine

On average the sun shines 37% of the time during the day in May, the highest percentage of any month. December has the lowest percentage at 12%.

Dumbarton enjoys an average of 1290 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

The city of Rome, Italy, experiences 2470 hours of sunshine annually, adding to its charm as a year-round tourist destination.

Manchester, UK, experiences just around 1420 hours of sunshine annually.

Stockholm, Sweden, receives approximately 1907 hours of sunshine annually.

Melbourne, Australia, has 2380 hours of sunshine annually, with its famous “four seasons in a day” weather pattern.

January, Dumbarton’s wettest month, receives 113 mm (4.4 in) of rainfall and has a maximum daytime temperature of 8°C (46°F). During the driest month May you can expect a temperature of 15°C (59°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Dumbarton Precipitation page.