Tiffin, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tiffin, a city in Seneca County, Ohio.
Today
83°F
Sunny
Sunny, with a high near 83. Southeast wind around 2 mph.
7-day forecast for Tiffin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 2 mph SE | 0% |
| Tonight | 62°F | Mostly Clear | 1 mph E | 0% |
| Wednesday | 86°F | Sunny | 0 to 5 mph SW | 3% |
| Wednesday Night | 66°F | Mostly Clear | 3 mph SW | 7% |
| Thursday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 to 8 mph SW | 50% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 58% |
| Friday | 84°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph SW | 58% |
| Friday Night | 66°F | Chance Showers And Thunderstorms | 5 mph SW | 50% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph SW | 19% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 7 mph SW | 19% |
| Sunday | 87°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 14 mph SW | 17% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 8 to 14 mph SW | 36% |
| Monday | 87°F | Chance Rain Showers | 13 mph SW | 40% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 49% |
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
Nearby towns & communities
Attica
Bascom
Bettsville
Bloomville
Flat Rock
Fort Seneca
Fostoria
Green Springs
Kansas
McCutchenville
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 Aug 4, 2026.