Tiffin, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tiffin, a city in Seneca County, Ohio.
Tonight
62°F
Partly Cloudy then Chance Light Rain
A chance of rain after 5am. Partly cloudy, with a low around 62. Southeast wind 12 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
7-day forecast for Tiffin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Partly Cloudy then Chance Light Rain | 12 to 17 mph SE | 25% |
| Wednesday | 68°F | Light Rain | 21 mph S | 84% |
| Wednesday Night | 51°F | Light Rain Likely | 9 to 20 mph SW | 63% |
| Thursday | 64°F | Mostly Sunny | 10 to 17 mph SW | 3% |
| Thursday Night | 47°F | Mostly Cloudy | 3 to 9 mph SW | 7% |
| Friday | 58°F | Chance Light Rain | 3 to 9 mph NW | 33% |
| Friday Night | 40°F | Chance Light Rain | 9 mph NW | 33% |
| Saturday | 54°F | Slight Chance Light Rain | 7 to 10 mph NW | 19% |
| Saturday Night | 34°F | Partly Cloudy | 2 to 6 mph W | 12% |
| Sunday | 55°F | Mostly Sunny then Slight Chance Light Rain | 3 to 13 mph SW | 15% |
| Sunday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 7 to 12 mph W | 15% |
| Monday | 58°F | Mostly Sunny | 7 to 14 mph W | 14% |
| Monday Night | 39°F | Partly Cloudy | 13 mph SW | 14% |
| Tuesday | 61°F | Mostly Sunny | 10 to 14 mph W | 4% |
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 Nov 4, 2026.