Franklin Grove, IL Weather & Growing Conditions
Today
59°F
Slight Chance Drizzle then Slight Chance Rain
A slight chance of drizzle before 1pm, then a slight chance of rain showers and a slight chance of drizzle between 1pm and 3pm, then a slight chance of rain and a slight chance of rain showers between 3pm and 4pm, then a slight chance of rain showers and a slight chance of drizzle. Cloudy. High near 59, with temperatures falling to around 54 in the afternoon. West southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Slight Chance Drizzle then Slight Chance Rain | 10 to 15 mph WSW | 15% |
| Tonight | 44°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph SW | 13% |
| Thursday | 55°F | Chance Rain | 10 to 15 mph W | 41% |
| Thursday Night | 37°F | Slight Chance Rain then Mostly Cloudy | 10 mph NNW | 19% |
| Friday | 48°F | Mostly Sunny | 5 to 10 mph N | 0% |
| 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% |
| Tuesday Night | 38°F | Partly Cloudy | 0 mph | 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.