Clayton (MO) Sunshine Hours by Month

When exploring climate, sunlight hours tell an important story. This page shows the total number of hours of direct sunlight per month and the average hours per day in Clayton, Missouri, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages.

Monthly hours of sunshine

Sunshine in Clayton varies greatly throughout the year. The sunniest month, July, reaches an impressive 311 hours, while December, the darkest month, offers only 128 hours. The total annual amount of sun is 2594 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Clayton. While July receives considerable daily sunshine with up to 10.4 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.3 hours of sunlight per day.

Average percent of sunshine

On average the sun shines 68% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 44%.

Clayton enjoys an average of 2594 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

Athens, Greece, enjoys 2769 hours of sunshine each year, making it one of the sunniest destinations in the Mediterranean region.

In contrast, Brussels, Belgium, receives only about 1590 hours of sunshine per year, known for its frequently overcast and rainy skies.

In Chicago, USA, the annual sunshine averages 2520 hours, contributing to its humid continental climate.

Perth, Australia, enjoys 3180 hours of sunshine annually, the highest among major Australian cities.

June, Clayton’s wettest month, receives 96 mm (3.8 in) of rainfall and has a maximum daytime temperature of 30°C (86°F). During the driest month January you can expect a temperature of 5°C (41°F).

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