Flanagan, IL Weather & Growing Conditions
This Afternoon
72°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 72, with temperatures falling to around 68 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Rain Showers Likely | 15 to 20 mph S | 59% |
| Tonight | 57°F | Rain Showers | 15 to 20 mph S | 91% |
| Wednesday | 61°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 33% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 7% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph WSW | 9% |
| Thursday Night | 42°F | Chance Rain Showers | 5 to 10 mph NW | 33% |
| Friday | 56°F | Slight Chance Rain Showers | 5 to 10 mph N | 21% |
| Friday Night | 34°F | Mostly Cloudy | 0 to 10 mph NNW | 4% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 33°F | Partly Cloudy | 0 mph | 2% |
| Sunday | 60°F | Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 33°F | Mostly Clear | 5 mph W | 7% |
| Monday | 65°F | Sunny | 5 to 10 mph SW | 3% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph WSW | 2% |
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 Nov 4, 2026.