Richwood, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Richwood, a village in Union County, Ohio.
Today
80°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 2pm and 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Southeast wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Richwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 3 to 7 mph SE | 41% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 7 mph S | 54% |
| Sunday | 79°F | Showers And Thunderstorms Likely | 6 to 13 mph W | 70% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 10 to 14 mph NE | 66% |
| Monday | 67°F | Chance Rain Showers | 10 to 14 mph NE | 47% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 46% |
| Tuesday | 68°F | Slight Chance Rain Showers | 14 mph NE | 20% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 14 mph NE | 61% |
| Wednesday | 67°F | Showers And Thunderstorms Likely | 13 mph E | 61% |
| Wednesday Night | 53°F | Rain Showers Likely | 8 to 13 mph E | 61% |
| Thursday | 69°F | Slight Chance Rain Showers | 9 mph NE | 16% |
| Thursday Night | 52°F | Mostly Cloudy | 6 to 10 mph N | 14% |
| Friday | 70°F | Mostly Sunny then Slight Chance Rain Showers | 6 to 13 mph NE | 15% |
| Friday Night | 50°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 13 mph NE | 15% |
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 Sep 19, 2026.