Franklin Grove, IL Weather & Growing Conditions
Overnight
56°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy. Low around 56, with temperatures rising to around 59 overnight. South southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Rain Showers | 15 mph SSW | 17% |
| Wednesday | 59°F | Patchy Drizzle | 15 mph SW | 17% |
| Wednesday Night | 45°F | Patchy Drizzle | 15 mph SW | 18% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 35% |
| Thursday Night | 39°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 24% |
| Friday | 49°F | Partly Sunny | 10 mph N | 4% |
| Friday Night | 30°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 | 4% |
| Sunday Night | 33°F | Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph WSW | 0% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Franklin Grove, IL
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
5b
Explore more for Franklin Grove, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Dixon 1W, Il (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.