Iroquois, IL Weather & Growing Conditions
Overnight
60°F
Rain Showers
Rain showers. Cloudy. Low around 60, with temperatures rising to around 63 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Rain Showers | 15 mph S | 82% |
| Wednesday | 65°F | Scattered Rain Showers then Patchy Drizzle | 10 to 15 mph SW | 43% |
| Wednesday Night | 47°F | Patchy Drizzle then Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 60°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph WSW | 18% |
| Thursday Night | 41°F | Chance Rain Showers | 5 to 10 mph WNW | 44% |
| Friday | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 15% |
| Friday Night | 33°F | Partly Cloudy | 5 to 10 mph NW | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 31°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 57°F | Sunny | 0 to 5 mph W | 4% |
| Sunday Night | 32°F | Mostly Clear | 0 mph | 1% |
| Monday | 63°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 0 to 5 mph WSW | 1% |
| Tuesday | 65°F | Sunny | 0 to 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iroquois, IL
Last spring frost
Apr 24
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
5b
Explore more for Iroquois, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Watseka 2 Nw, Il (8.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.