Flat Rock, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flat Rock, a community in Seneca County, Ohio.
Today
76°F
Rain Showers Likely
Rain showers likely before 5pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 76. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Flat Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Rain Showers Likely | 6 mph E | 55% |
| Tonight | 64°F | Chance Showers And Thunderstorms | 6 mph S | 75% |
| Sunday | 74°F | Showers And Thunderstorms | 6 to 13 mph NW | 91% |
| Sunday Night | 56°F | Chance Rain Showers | 10 to 14 mph NE | 43% |
| Monday | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 16 mph NE | 22% |
| Monday Night | 52°F | Slight Chance Rain Showers | 12 to 16 mph NE | 22% |
| Tuesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 12 to 16 mph NE | 16% |
| Tuesday Night | 52°F | Rain Showers Likely | 13 to 17 mph E | 60% |
| Wednesday | 66°F | Rain Showers Likely | 12 to 15 mph E | 60% |
| Wednesday Night | 52°F | Chance Rain Showers | 7 to 13 mph E | 54% |
| Thursday | 68°F | Slight Chance Rain Showers | 10 mph E | 23% |
| Thursday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 10 mph NE | 20% |
| Friday | 69°F | Mostly Sunny | 5 to 13 mph NE | 13% |
| Friday Night | 51°F | Partly Cloudy | 3 to 12 mph NE | 13% |
Forecast source: National Weather Service (api.weather.gov) for Flat Rock (41.235, -82.859). Updated through the day.
Growing snapshot for Flat Rock
Last spring frost
Apr 25
First fall frost
Oct 25
Growing season
183 days
Hardiness zone
6a
More local growing data for Flat Rock: nearby ZIP 44828 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Attica
Bascom
Bettsville
Bloomville
Fort Seneca
Fostoria
Green Springs
Kansas
McCutchenville
New Riegel
Old Fort
Republic
Tiffin
Climate data from the nearest NOAA station, Norwalk Wwtp, Oh (12.8 mi from Flat Rock). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.