Decatur (IL) Sunshine Hours by Month
In climate discussions, the hours of sunlight reveal much about a location. This page shows the total number of hours of direct sunlight per month and the average hours per day in Decatur, Illinois, United States of America. Long-term data from 1990 to 2020 was used to calculate these averages.
Monthly hours of sunshine
Sunshine in Decatur varies greatly throughout the year. The sunniest month, July, reaches an impressive 320 hours, while December, the darkest month, offers only 129 hours. The total annual amount of sun is 2660 hours.
Daily hours of sunshine
Seasonal changes in sunshine hours are quite obvious in Decatur. While July receives considerable daily sunshine with up to 10.7 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 70% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 44%.
Decatur vs Major Cities: Sunshine Compared
Decatur enjoys an average of 2660 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.
In contrast, Tromsø , Norway, receives only about 1270 hours of sunshine per year, known for the polar night with no sunlight for weeks during winter.
In Chicago, USA, the annual sunshine averages 2520 hours, contributing to its humid continental climate.
Adelaide, Australia, enjoys 2770 hours of sunshine annually, with long, sunny summers.
Related Climate Data for Decatur
June, Decatur’s wettest month, receives 99 mm (3.9 in) of rainfall and has a maximum daytime temperature of 29°C (84°F). During the driest month January you can expect a temperature of 2°C (36°F).
For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Decatur Precipitation page.
