Harman US

Eldorado, OH Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Eldorado, a village in Preble County, Ohio.

This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind around 15 mph.

7-day forecast for Eldorado

WhenTempForecastWindPrecip
This Afternoon 75°F Sunny 15 mph S 2%
Tonight 61°F Mostly Cloudy then Rain Showers Likely 12 to 18 mph S 73%
Wednesday 68°F Rain Showers 13 to 20 mph S 99%
Wednesday Night 48°F Slight Chance Rain Showers then Mostly Cloudy 7 to 12 mph SW 20%
Thursday 63°F Mostly Sunny 9 to 15 mph SW 0%
Thursday Night 44°F Partly Cloudy 3 to 9 mph W 1%
Friday 58°F Partly Sunny 3 to 9 mph NW 13%
Friday Night 38°F Mostly Cloudy 9 mph NW 13%
Saturday 54°F Partly Sunny 9 mph NW 12%
Saturday Night 34°F Mostly Cloudy 6 mph W 3%
Sunday 56°F Mostly Sunny 3 to 12 mph W 7%
Sunday Night 34°F Partly Cloudy 8 mph NW 11%
Monday 58°F Sunny 6 to 10 mph W 12%
Monday Night 38°F Mostly Clear 10 mph SW 11%

Forecast source: National Weather Service (api.weather.gov) for Eldorado (39.904, -84.675). Updated through the day.

Growing snapshot for Eldorado

Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
176 days
Hardiness zone
6a

More local growing data for Eldorado: nearby ZIP 45321 weather · frost dates · planting calendar · Ohio frost dates

Nearby towns & communities

All Ohio locations ›

Climate data from the nearest NOAA station, Eaton, Oh (9.6 mi from Eldorado). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.