Flanagan, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flanagan, a village in Livingston County, Illinois.
This Afternoon
72°F
Rain Likely
Rain likely and a slight chance of thunderstorms. Mostly cloudy. High near 72, with temperatures falling to around 68 in the afternoon. South wind 15 to 20 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Flanagan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Rain Likely | 15 to 20 mph S | 59% |
| Tonight | 57°F | Rain | 15 to 20 mph S | 91% |
| Wednesday | 61°F | Chance Rain then Mostly Cloudy | 15 mph SW | 33% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 6% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph WSW | 9% |
| Thursday Night | 42°F | Chance Rain | 5 to 10 mph NW | 33% |
| Friday | 56°F | Slight Chance Rain | 5 to 10 mph NNW | 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 | 34°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) for Flanagan (40.877, -88.859). Updated through the day.
Growing snapshot for Flanagan
Last spring frost
Apr 26
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
5b
More local growing data for Flanagan: nearby ZIP 61740 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Campus
Chatsworth
Cornell
Cullom
Dwight
Emington
Fairbury
Forrest
Long Point
Odell
Pontiac
Saunemin
Strawn
Climate data from the nearest NOAA station, Minonk, Il (9 mi from Flanagan). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.