Hennepin, IL Weather & Growing Conditions
Today
60°F
Cloudy
Cloudy. High near 60, with temperatures falling to around 57 in the afternoon. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 60°F | Cloudy | 10 to 15 mph SW | 10% |
| Tonight | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph SW | 15% |
| Thursday | 56°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph W | 37% |
| Thursday Night | 42°F | Chance Rain Showers | 5 mph NW | 32% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 0 mph | 1% |
| Sunday | 57°F | Sunny | 0 to 5 mph W | 2% |
| Sunday Night | 34°F | Clear | 0 to 5 mph W | 1% |
| Monday | 62°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 0 to 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 0 to 5 mph NW | 1% |
| Tuesday Night | 39°F | Partly Cloudy | 0 mph | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hennepin, IL
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
Explore more for Hennepin, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Hennepin Wtr Trmt Plt, Il (3.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.