Tiffin, OH Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Tiffin, a city in Seneca County, Ohio.

Today

67°F

Light Rain

Rain before 10am, then rain and a slight chance of thunderstorms. Cloudy, with a high near 67. South wind around 21 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

7-day forecast for Tiffin

When	Temp	Forecast	Wind	Precip
Today	67°F	Light Rain	21 mph S	93%
Tonight	51°F	Light Rain Likely then Mostly Cloudy	9 to 20 mph SW	56%
Thursday	62°F	Partly Sunny	10 to 17 mph SW	0%
Thursday Night	47°F	Mostly Cloudy then Slight Chance Rain Showers	6 to 10 mph SW	20%
Friday	55°F	Rain Showers Likely	6 to 10 mph W	58%
Friday Night	38°F	Chance Rain Showers	10 mph NW	49%
Saturday	51°F	Slight Chance Rain Showers then Mostly Cloudy	8 to 12 mph NW	18%
Saturday Night	33°F	Mostly Cloudy	7 mph W	4%
Sunday	55°F	Mostly Sunny	6 to 14 mph W	7%
Sunday Night	33°F	Mostly Clear	6 to 12 mph W	7%
Monday	58°F	Sunny	6 to 12 mph W	3%
Monday Night	38°F	Mostly Clear	7 to 10 mph SW	3%
Tuesday	62°F	Mostly Sunny	9 to 13 mph W	1%
Tuesday Night	35°F	Partly Cloudy	2 to 8 mph W	1%

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

More local growing data for Tiffin: nearby ZIP 44883 weather · frost dates · planting calendar · Ohio frost dates

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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 Nov 4, 2026.