Flat Rock, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flat Rock, a community in Seneca County, Ohio.
This Afternoon
76°F
Sunny
Sunny, with a high near 76. South wind around 15 mph.
7-day forecast for Flat Rock
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 15 mph S | 2% |
| Tonight | 63°F | Partly Cloudy then Slight Chance Light Rain | 9 to 16 mph S | 18% |
| Wednesday | 68°F | Light Rain | 16 to 21 mph S | 81% |
| Wednesday Night | 52°F | Light Rain Likely | 8 to 20 mph SW | 62% |
| Thursday | 63°F | Partly Sunny | 9 to 16 mph SW | 3% |
| Thursday Night | 48°F | Mostly Cloudy | 3 to 9 mph SW | 10% |
| Friday | 58°F | Chance Light Rain | 3 to 9 mph W | 36% |
| Friday Night | 41°F | Chance Light Rain | 8 mph NW | 36% |
| Saturday | 53°F | Slight Chance Light Rain | 7 to 10 mph NW | 23% |
| Saturday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph W | 18% |
| Sunday | 55°F | Mostly Sunny | 3 to 12 mph SW | 14% |
| Sunday Night | 36°F | Partly Cloudy | 9 mph W | 14% |
| Monday | 57°F | Slight Chance Light Rain | 7 to 13 mph W | 15% |
| Monday Night | 40°F | Slight Chance Light Rain then Partly Cloudy | 12 mph SW | 15% |
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 Nov 3, 2026.