Downers Grove (IL) 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 Downers Grove, Illinois, United States of America. These averages rely on historical data collected over 30 years, from 1990 to 2020.
Monthly hours of sunshine
Seasonal sunshine in Downers Grove varies. It peaks at 319 hours in July and drops to 107 hours in December. The total annual amount of sun is 2509 hours.
Daily hours of sunshine
Seasonal changes in sunshine hours are quite obvious in Downers Grove. While July receives considerable daily sunshine with up to 10.6 hours, December marks the darkest time of the year, where sunshine is scarce 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%.
Downers Grove vs Major Cities: Sunshine Compared
Downers Grove enjoys an average of 2509 hours of sunshine annually. Let’s compare this with some popular tourist destinations:
In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.
In contrast, Reykjavík, Iceland, receives only about 1330 hours of sunshine per year, known for its frequently overcast and rainy skies.
Toronto, Canada, sees around 2071 hours of sunshine each year, with especially long, bright summer days.
In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.
Related Climate Data for Downers Grove
June, Downers Grove’s wettest month, receives 114 mm (4.5 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 0°C (32°F).
For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Downers Grove Precipitation page.
