Aledo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Aledo, a city in Mercer County, Illinois.
Overnight
62°F
Mostly Clear
Mostly clear, with a low around 62. South wind around 5 mph.
7-day forecast for Aledo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 87°F | Mostly Sunny | 5 to 10 mph S | 6% |
| Tuesday Night | 68°F | Showers And Thunderstorms Likely | 5 mph NE | 60% |
| Wednesday | 80°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph NE | 75% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph N | 82% |
| Thursday | 81°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph NE | 62% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph E | 9% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph S | 8% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 12% |
| Saturday | 86°F | Sunny | 5 mph S | 9% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 13% |
| Sunday | 87°F | Sunny | 10 to 15 mph SW | 13% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 29% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 29% |
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 Aug 4, 2026.