Franklin Grove, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Franklin Grove, a village in Lee County, Illinois.
Overnight
55°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 55, with temperatures rising to around 59 overnight. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Franklin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Chance Rain Showers | 15 mph SSW | 28% |
| Wednesday | 59°F | Slight Chance Rain Showers | 15 mph SW | 17% |
| Wednesday Night | 45°F | Slight Chance Rain Showers | 15 mph SW | 19% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 50% |
| Thursday Night | 39°F | Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 25% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph N | 5% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WSW | 0% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
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 Nov 4, 2026.