About Meredosia, IL

Meredosia is a city of approximately 1,000 people in Illinois, United States. Located in the Central Time Zone at 39.8°N latitude.

Recent weather here gives a sense of typical conditions: in 2025, Meredosia recorded a mean annual temperature of 55°F, ranging from -5°F lows in January to 95°F highs in September, with about 29 inches of precipitation across the year.