Tiffin, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tiffin, a city in Seneca County, Ohio.
This Afternoon
74°F
Sunny
Sunny, with a high near 74. Northeast wind around 12 mph.
7-day forecast for Tiffin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Sunny | 12 mph NE | 0% |
| Tonight | 57°F | Partly Cloudy | 3 to 9 mph E | 1% |
| Saturday | 77°F | Chance Rain Showers | 6 mph E | 49% |
| Saturday Night | 65°F | Showers And Thunderstorms | 7 mph S | 76% |
| Sunday | 75°F | Showers And Thunderstorms | 6 to 14 mph NW | 88% |
| Sunday Night | 58°F | Rain Showers Likely | 14 mph NE | 63% |
| Monday | 67°F | Chance Rain Showers | 13 to 18 mph NE | 40% |
| Monday Night | 55°F | Chance Rain Showers | 14 to 18 mph NE | 40% |
| Tuesday | 66°F | Chance Rain Showers | 15 to 18 mph NE | 32% |
| Tuesday Night | 56°F | Chance Rain Showers | 13 to 18 mph NE | 51% |
| Wednesday | 67°F | Chance Rain Showers | 14 mph NE | 51% |
| Wednesday Night | 55°F | Chance Rain Showers | 8 to 12 mph NE | 50% |
| Thursday | 69°F | Slight Chance Rain Showers | 10 mph NE | 19% |
| Thursday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph N | 19% |
Forecast source: National Weather Service (api.weather.gov) for Tiffin (41.115, -83.180). Updated through the day.
Growing snapshot for Tiffin
Last spring frost
Apr 23
First fall frost
Oct 23
Growing season
184 days
Hardiness zone
6a
More local growing data for Tiffin: nearby ZIP 44883 weather · frost dates · planting calendar · Ohio frost dates
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New Riegel
Old Fort
Republic
Climate data from the nearest NOAA station, Tiffin, Oh (0.6 mi from Tiffin). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.