Richwood, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Richwood, a village in Union County, Ohio.
Tonight
60°F
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 4am. Mostly cloudy, with a low around 60. South wind 12 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Richwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Mostly Cloudy then Slight Chance Rain Showers | 12 to 15 mph S | 18% |
| Wednesday | 66°F | Showers And Thunderstorms | 17 mph S | 98% |
| Wednesday Night | 50°F | Showers And Thunderstorms then Mostly Cloudy | 6 to 17 mph SW | 78% |
| Thursday | 63°F | Mostly Sunny | 7 to 14 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 2 to 8 mph SW | 1% |
| Friday | 59°F | Partly Sunny then Slight Chance Light Rain | 2 to 8 mph NW | 17% |
| Friday Night | 39°F | Slight Chance Light Rain | 8 mph NW | 19% |
| Saturday | 53°F | Slight Chance Light Rain | 9 mph NW | 19% |
| Saturday Night | 34°F | Slight Chance Light Rain then Partly Cloudy | 2 to 6 mph W | 19% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Light Rain | 3 to 10 mph W | 17% |
| Sunday Night | 34°F | Slight Chance Light Rain then Partly Cloudy | 9 mph W | 17% |
| Monday | 57°F | Slight Chance Light Rain | 7 to 12 mph W | 19% |
| Monday Night | 37°F | Slight Chance Light Rain then Partly Cloudy | 10 mph SW | 19% |
| Tuesday | 61°F | Mostly Sunny | 12 mph W | 4% |
Forecast source: National Weather Service (api.weather.gov) for Richwood (40.427, -83.294). Updated through the day.
Growing snapshot for Richwood
Last spring frost
Apr 19
First fall frost
Oct 26
Growing season
188 days
Hardiness zone
6a
More local growing data for Richwood: nearby ZIP 43344 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Marysville, Oh (16.9 mi from Richwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.