Iroquois, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iroquois, a village in Iroquois County, Illinois.
Tonight
60°F
Rain
Rain. Cloudy, with a low around 60. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Iroquois
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Rain | 15 mph S | 77% |
| Wednesday | 65°F | Chance Rain then Mostly Cloudy | 10 to 15 mph SSW | 46% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 mph SW | 7% |
| Thursday | 61°F | Partly Sunny | 5 to 15 mph WSW | 5% |
| Thursday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 0 to 5 mph WNW | 20% |
| Friday | 56°F | Slight Chance Rain Showers then Partly Sunny | 0 to 5 mph NNW | 24% |
| Friday Night | 35°F | Mostly Cloudy | 0 to 5 mph NNW | 9% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph WNW | 7% |
| Saturday Night | 32°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 59°F | Mostly Sunny | 0 to 5 mph W | 10% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph WNW | 10% |
| Monday | 63°F | Sunny | 0 to 5 mph WSW | 5% |
| Monday Night | 37°F | Mostly Clear | 5 mph WSW | 2% |
| Tuesday | 65°F | Sunny | 0 to 5 mph W | 1% |
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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Onarga
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Sheldon
Thawville
Watseka
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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 Nov 4, 2026.