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
83°F
Sunny
Sunny, with a high near 83. East wind around 2 mph.
7-day forecast for Flat Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 2 mph E | 0% |
| Tonight | 62°F | Mostly Clear | 2 mph NE | 0% |
| Wednesday | 86°F | Sunny | 0 to 3 mph SW | 5% |
| Wednesday Night | 66°F | Partly Cloudy | 3 mph SW | 7% |
| Thursday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 8 mph SW | 51% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 58% |
| Friday | 83°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 58% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SW | 52% |
| Saturday | 84°F | Slight Chance Showers And Thunderstorms | 7 mph SW | 20% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 6 mph SW | 20% |
| Sunday | 87°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 14 mph SW | 18% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 9 to 13 mph SW | 37% |
| Monday | 87°F | Chance Rain Showers | 13 mph SW | 42% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 51% |
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 Aug 4, 2026.