Eldorado, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Eldorado, a city in Saline County, Illinois.
Today
87°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny. High near 87, with temperatures falling to around 85 in the afternoon. East wind 0 to 3 mph.
7-day forecast for Eldorado
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Patchy Fog then Sunny | 0 to 3 mph E | 0% |
| Tonight | 63°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 89°F | Sunny | 2 mph S | 0% |
| Wednesday Night | 68°F | Mostly Clear | 2 mph SSE | 2% |
| Thursday | 90°F | Slight Chance Rain Showers | 1 to 6 mph SSW | 20% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 50% |
| Friday | 89°F | Chance Showers And Thunderstorms | 1 to 6 mph SSW | 50% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 3 mph SSW | 31% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 1 to 5 mph SSW | 30% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 21% |
| Sunday | 91°F | Sunny | 2 to 8 mph SSW | 8% |
| Sunday Night | 72°F | Mostly Clear | 3 to 8 mph SSW | 5% |
| Monday | 93°F | Sunny | 3 to 9 mph SSW | 5% |
| Monday Night | 73°F | Mostly Clear | 7 mph SSW | 8% |
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 Aug 4, 2026.