Flanagan, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flanagan, a village in Livingston County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South wind around 5 mph, with gusts as high as 15 mph.
7-day forecast for Flanagan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph S | 2% |
| Tonight | 67°F | Mostly Cloudy | 0 to 5 mph S | 2% |
| Wednesday | 83°F | Chance Showers And Thunderstorms | 5 mph SW | 44% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph NW | 90% |
| Thursday | 81°F | Showers And Thunderstorms | 0 to 5 mph SSW | 82% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 30% |
| Friday | 84°F | Mostly Sunny | 0 to 5 mph S | 10% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 21% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph SSW | 12% |
| Sunday | 89°F | Sunny | 10 to 15 mph SSW | 11% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph SSW | 22% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms | 10 mph SSW | 22% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 10 mph SW | 31% |
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 Aug 4, 2026.