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
79°F
Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers and thunderstorms before 11am, then showers and thunderstorms likely. Cloudy. High near 79, with temperatures falling to around 77 in the afternoon. East southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Franklin Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph ESE | 98% |
| Tonight | 62°F | Showers And Thunderstorms | 5 to 10 mph E | 95% |
| Sunday | 69°F | Showers And Thunderstorms Likely | 10 to 15 mph NNE | 57% |
| Sunday Night | 55°F | Chance Rain Showers | 15 mph NE | 37% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 47% |
| Monday Night | 50°F | Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 15 mph NE | 11% |
| Wednesday | 66°F | Mostly Sunny | 10 to 15 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 71°F | Mostly Sunny | 5 mph NE | 2% |
| Friday Night | 51°F | Partly Cloudy | 5 mph ENE | 2% |
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
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Paw Paw
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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 Sep 19, 2026.