Aledo, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Aledo, a city in Mercer County, Illinois.
This Afternoon
69°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Cloudy. High near 69, with temperatures falling to around 67 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Aledo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms Likely | 15 mph S | 62% |
| Tonight | 51°F | Showers And Thunderstorms Likely | 10 to 15 mph S | 68% |
| Wednesday | 56°F | Slight Chance Rain Showers | 15 mph SW | 23% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 30% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 30% |
| Friday | 53°F | Partly Sunny | 5 to 10 mph N | 10% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 35°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 10% |
| Sunday Night | 36°F | Mostly Clear | 0 to 5 mph W | 2% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
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
Nearby towns & communities
Alexis
Cable
Eliza
Hamlet
Joy
Keithsburg
Matherville
Millersburg
New Boston
North Henderson
Preemption
Reynolds
Seaton
Sherrard
Viola
Windsor
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 Nov 4, 2026.