Aledo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Aledo, a city in Mercer County, Illinois.
This Afternoon
82°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 82. South wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Aledo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 21% |
| Tonight | 66°F | Showers And Thunderstorms | 5 mph SE | 81% |
| Sunday | 71°F | Showers And Thunderstorms | 5 to 15 mph NE | 79% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 15 mph NE | 54% |
| Monday | 64°F | Rain Showers Likely | 15 mph NE | 72% |
| Monday Night | 54°F | Rain Showers Likely | 10 to 15 mph NE | 72% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 3% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 0 to 5 mph NE | 15% |
| Friday | 72°F | Slight Chance Rain Showers | 0 to 5 mph NE | 15% |
| Friday Night | 56°F | Partly Cloudy | 0 to 5 mph NE | 7% |
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.