Franklin Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Franklin Grove, a village in Lee County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast for Franklin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 0 to 10 mph SSW | 67% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 0 to 5 mph WSW | 74% |
| Wednesday Night | 62°F | Showers And Thunderstorms | 0 to 5 mph NNE | 81% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph ENE | 46% |
| Thursday Night | 60°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph ESE | 16% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SSE | 12% |
| Friday Night | 63°F | Mostly Clear | 0 to 5 mph S | 12% |
| Saturday | 84°F | Sunny | 5 to 10 mph SSW | 9% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 19% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SSW | 19% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 34% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 10 mph WNW | 41% |
Forecast source: National Weather Service (api.weather.gov) for Franklin Grove (41.841, -89.300). Updated through the day.
Growing snapshot for Franklin Grove
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
More local growing data for Franklin Grove: nearby ZIP 61031 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Amboy
Ashton
Compton
Dixon
Grand Detour
Harmon
Lee
Lee Center
Lost Nation
Nachusa
Nelson
Paw Paw
Steward
Sublette
West Brooklyn
Climate data from the nearest NOAA station, Dixon 1W, Il (9.9 mi from Franklin Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.