Flanagan, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flanagan, a village in Livingston County, Illinois.
Tonight
67°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 67. East southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Flanagan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 67°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph ESE | 17% |
| Saturday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 43% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph W | 69% |
| Sunday | 75°F | Showers And Thunderstorms Likely | 5 to 15 mph NE | 72% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 70% |
| Monday | 68°F | Showers And Thunderstorms Likely | 15 mph ENE | 68% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Tuesday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NNE | 7% |
| Wednesday | 70°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 10 mph NNE | 5% |
| Thursday | 71°F | Mostly Sunny | 0 to 10 mph N | 2% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NNE | 2% |
| Friday | 73°F | Mostly Sunny | 0 to 10 mph NNE | 4% |
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 Sep 19, 2026.