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Aledo, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Aledo, a city in Mercer County, Illinois.

Overnight
69°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 3am and 4am, then patchy fog and a slight chance of showers and thunderstorms. Partly cloudy, with a low around 69. Southeast wind 5 to 10 mph. Chance of precipitation is 20%.

7-day forecast for Aledo

WhenTempForecastWindPrecip
Overnight 69°F Slight Chance Showers And Thunderstorms 5 to 10 mph SE 24%
Saturday 84°F Patchy Fog 5 to 10 mph S 53%
Saturday Night 66°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 mph W 82%
Sunday 72°F Showers And Thunderstorms 10 to 15 mph NE 79%
Sunday Night 58°F Chance Showers And Thunderstorms 15 mph NE 54%
Monday 65°F Showers And Thunderstorms Likely 15 mph NE 63%
Monday Night 53°F Chance Rain Showers 10 to 15 mph NE 54%
Tuesday 63°F Chance Rain Showers 10 to 15 mph NE 35%
Tuesday Night 49°F Mostly Clear 5 to 10 mph NE 6%
Wednesday 67°F Mostly Sunny 10 mph NE 1%
Wednesday Night 52°F Partly Cloudy 5 mph NE 1%
Thursday 69°F Mostly Sunny 5 mph NE 5%
Thursday Night 55°F Partly Cloudy 5 mph NE 4%
Friday 72°F Mostly Sunny 5 mph NE 3%

Forecast source: National Weather Service (api.weather.gov) for Aledo (41.199, -90.746). Updated through the day.

Growing snapshot for Aledo

Last spring frost
Apr 22
First fall frost
Oct 19
Growing season
181 days
Hardiness zone
5b

More local growing data for Aledo: nearby ZIP 61231 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Aledo, Il (1.7 mi from Aledo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.