Eldorado, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Eldorado, a city in Saline County, Illinois.
This Afternoon
79°F
Mostly Sunny
Mostly sunny. High near 79, with temperatures falling to around 77 in the afternoon. South southeast wind around 18 mph, with gusts as high as 25 mph.
7-day forecast for Eldorado
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Mostly Sunny | 18 mph SSE | 3% |
| Tonight | 58°F | Showers And Thunderstorms | 7 to 16 mph S | 98% |
| Wednesday | 69°F | Partly Sunny | 6 to 12 mph SW | 11% |
| Wednesday Night | 44°F | Partly Cloudy | 3 mph SW | 0% |
| Thursday | 69°F | Sunny | 2 to 9 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 mph W | 5% |
| Friday | 62°F | Partly Sunny | 2 to 10 mph NNW | 5% |
| Friday Night | 39°F | Mostly Cloudy | 2 to 7 mph NNW | 1% |
| Saturday | 58°F | Mostly Sunny | 5 mph NNW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 1 mph NW | 1% |
| Sunday | 62°F | Sunny | 0 to 7 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 3 mph WNW | 6% |
| Monday | 65°F | Sunny | 1 to 8 mph WNW | 2% |
| Monday Night | 38°F | Mostly Clear | 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Eldorado (37.812, -88.442). Updated through the day.
Growing snapshot for Eldorado
Last spring frost
Apr 7
First fall frost
Oct 26
Growing season
202 days
Hardiness zone
7a
More local growing data for Eldorado: nearby ZIP 62930 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Harrisburg, Il (8.6 mi from Eldorado). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.