Naperville (IL) 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 Naperville, Illinois, United States of America. The figures are based on a 30-year period (1990–2020) to provide a reliable average.
Monthly hours of sunshine
Sunshine in Naperville varies greatly throughout the year. The sunniest month, July, reaches an impressive 319 hours, while December, the darkest month, offers only 107 hours. The total annual amount of sun is 2509 hours.
Daily hours of sunshine
This means the city can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 10.6 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 3.6 hours of sunlight per day.
Average percent of sunshine
On average the sun shines 69% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 37%.
Naperville vs Major Cities: Sunshine Compared
Naperville enjoys an average of 2509 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, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.
Beijing, China, has 2505 hours of sunshine annually, with clear, sunny days in winter.
In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.
Related Climate Data for Naperville
June, Naperville’s wettest month, receives 106 mm (4.2 in) of rainfall and has a maximum daytime temperature of 27°C (81°F). During the driest month January you can expect a temperature of -1°C (30°F).
For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Naperville Precipitation page.
