Iroquois, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a village in Iroquois County, Illinois.
This Afternoon
76°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 76. East northeast wind around 10 mph. Chance of precipitation is 50%.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Chance Rain Showers | 10 mph ENE | 53% |
| Tonight | 63°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph ESE | 17% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 58% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 5 mph SW | 64% |
| Sunday | 76°F | Showers And Thunderstorms Likely | 5 to 10 mph NNE | 67% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 10 mph NE | 65% |
| Monday | 66°F | Showers And Thunderstorms Likely | 10 mph ENE | 65% |
| Monday Night | 50°F | Chance Showers And Thunderstorms | 10 mph NE | 41% |
| Tuesday | 66°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Tuesday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NNE | 18% |
| Wednesday | 68°F | Partly Sunny | 5 mph NNE | 7% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 7% |
| Thursday | 70°F | Partly Sunny | 0 to 5 mph NNE | 4% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Iroquois (40.829, -87.584). Updated through the day.
Growing snapshot for Iroquois
Last spring frost
Apr 24
First fall frost
Oct 16
Growing season
174 days
Hardiness zone
5b
More local growing data for Iroquois: nearby ZIP 60945 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Watseka 2 Nw, Il (8.7 mi from Iroquois). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.