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Flanagan, IL Weather & Growing Conditions

Today
85°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely before 1pm. Cloudy, with a high near 85. Southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 85°F Showers And Thunderstorms Likely 5 mph SE 58%
Tonight 67°F Showers And Thunderstorms Likely 0 to 5 mph SSW 73%
Sunday 75°F Showers And Thunderstorms Likely 5 to 15 mph N 73%
Sunday Night 57°F Chance Showers And Thunderstorms 10 to 15 mph NE 52%
Monday 67°F Rain Showers Likely 15 mph ENE 61%
Monday Night 52°F Chance Rain Showers 10 to 15 mph NE 45%
Tuesday 66°F Chance Rain Showers 10 to 15 mph NE 28%
Tuesday Night 51°F Slight Chance Rain Showers then Mostly Cloudy 5 to 15 mph NNE 15%
Wednesday 69°F Mostly Sunny 5 to 10 mph NNE 6%
Wednesday Night 52°F Partly Cloudy 5 to 10 mph NNE 2%
Thursday 71°F Partly Sunny 5 to 10 mph NNE 2%
Thursday Night 53°F Partly Cloudy 0 to 5 mph NNE 2%
Friday 74°F Mostly Sunny 5 to 10 mph NE 3%
Friday Night 53°F Partly Cloudy 0 to 5 mph NE 3%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Flanagan, IL

Last spring frost
Apr 26
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
5b

Explore more for Flanagan, IL: full frost dates · planting calendar · Illinois frost dates

Climate data from the nearest NOAA station, Minonk, Il (9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.