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Tiffin, IA Weather & Growing Conditions

Today
81°F
Occasional Showers And Thunderstorms
Occasional showers and thunderstorms before 11am, then a chance of showers and thunderstorms between 11am and noon, then a slight chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81. South wind 5 to 10 mph. Chance of precipitation is 90%.

7-day forecast

WhenTempForecastWindPrecip
Today 81°F Occasional Showers And Thunderstorms 5 to 10 mph S 88%
Tonight 63°F Chance Showers And Thunderstorms then Showers And Thunderstorms 5 to 10 mph NW 79%
Sunday 68°F Showers And Thunderstorms Likely 10 to 15 mph NE 65%
Sunday Night 57°F Rain Showers Likely 10 to 15 mph NE 55%
Monday 63°F Rain Showers Likely 15 mph NE 55%
Monday Night 52°F Chance Rain Showers 10 to 15 mph NE 43%
Tuesday 61°F Chance Rain Showers then Partly Sunny 10 mph NE 26%
Tuesday Night 47°F Mostly Clear 5 to 10 mph NE 6%
Wednesday 65°F Sunny 5 mph NE 0%
Wednesday Night 51°F Partly Cloudy 5 mph NE 1%
Thursday 67°F Mostly Sunny 5 mph NE 7%
Thursday Night 54°F Partly Cloudy 0 to 5 mph E 5%
Friday 70°F Mostly Sunny 5 mph E 6%
Friday Night 55°F Partly Cloudy 5 mph E 7%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Tiffin, IA

Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
180 days
Hardiness zone
5b

Explore more for Tiffin, IA: full frost dates · planting calendar · Iowa frost dates

Climate data from the nearest NOAA station, Iowa City Muni Ap, Ia (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.