Coldwater, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coldwater, a village in Mercer County, Ohio.
Tonight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. East wind around 7 mph.
7-day forecast for Coldwater
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Partly Cloudy | 7 mph E | 2% |
| Saturday | 78°F | Rain Showers Likely | 7 mph SE | 71% |
| Saturday Night | 64°F | Showers And Thunderstorms Likely | 6 mph S | 72% |
| Sunday | 77°F | Showers And Thunderstorms | 5 to 10 mph NW | 75% |
| Sunday Night | 57°F | Showers And Thunderstorms | 9 to 13 mph NE | 75% |
| Monday | 68°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 56% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 10 to 16 mph NE | 48% |
| Tuesday | 68°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 36% |
| Tuesday Night | 55°F | Chance Rain Showers | 7 to 14 mph NE | 28% |
| Wednesday | 68°F | Chance Rain Showers | 10 mph NE | 25% |
| Wednesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph N | 17% |
| Thursday | 70°F | Partly Sunny | 6 to 9 mph N | 10% |
| Thursday Night | 53°F | Mostly Cloudy | 3 to 9 mph N | 10% |
| Friday | 70°F | Partly Sunny | 5 to 9 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov) for Coldwater (40.483, -84.633). Updated through the day.
Growing snapshot for Coldwater
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
175 days
Hardiness zone
6a
More local growing data for Coldwater: nearby ZIP 45828 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Celina 3 Ne, Oh (9.7 mi from Coldwater). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.