Weather Forecast and Radar for Troy, Illinois

Weather in Troy, IL

Troy, Illinois, United States has a humid continental climate, with four distinct seasons. Summers in Troy have an average high temperature of 86°F (30°C), and an average low temperature of 66°F (19°C). The hottest month is July, with an average high temperature of 89°F (32°C), and an average low temperature of 71°F (22°C). Winters in Troy have an average high temperature of 38°F (3°C), and an average low temperature of 20°F (-7°C). The coldest month is January, with an average high temperature of 36°F (2°C), and an average low temperature of 22°F (-6°C). Spring in Troy has an average high temperature of 59°F (15°C), and an average low temperature of 39°F (4°C). The warmest month is May, with an average high temperature of 73°F (23°C), and an average low temperature of 49°F (9°C). Fall in Troy has an average high temperature of 70°F (21°C), and an average low temperature of 51°F (11°C). The warmest month is September, with an average high temperature of 77°F (25°C), and an average low temperature of 57°F (14°C).

Fast Facts About Troy, IL

As of 2020, the city population is 10278.

Major Cities Nearby Troy, IL

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Troy, Illinois.