With a population of around 1,100, Flanagan sits in Illinois, United States. The city operates in the Central Time Zone.
Recent weather here gives a sense of typical conditions: in 2025, Flanagan recorded a mean annual temperature of 53°F, ranging from -8°F lows in January to 93°F highs in May, with about 31 inches of precipitation across the year.
View historical weather for Flanagan · More cities in Illinois