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Topeka, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Topeka, a village in Mason County, Illinois.

Today
87°F
Slight Chance Showers And Thunderstorms then Mostly Cloudy
A slight chance of showers and thunderstorms before 10am. Mostly cloudy, with a high near 87. South southeast wind around 6 mph. Chance of precipitation is 20%.

7-day forecast for Topeka

WhenTempForecastWindPrecip
Today 87°F Slight Chance Showers And Thunderstorms then Mostly Cloudy 6 mph SSE 18%
Tonight 68°F Chance Showers And Thunderstorms 5 mph SW 51%
Sunday 77°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 2 to 9 mph N 70%
Sunday Night 59°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 7 to 10 mph NE 69%
Monday 66°F Showers And Thunderstorms Likely 10 mph NE 69%
Monday Night 54°F Chance Rain Showers 9 mph NE 50%
Tuesday 64°F Slight Chance Rain Showers 9 mph NE 21%
Tuesday Night 51°F Partly Cloudy 5 to 8 mph NNE 11%
Wednesday 68°F Mostly Sunny 7 mph NNE 3%
Wednesday Night 53°F Partly Cloudy 2 to 6 mph NNE 2%
Thursday 70°F Mostly Sunny 5 mph NNE 4%
Thursday Night 55°F Partly Cloudy 3 mph NE 3%
Friday 73°F Mostly Sunny 5 mph NE 4%
Friday Night 55°F Partly Cloudy 3 mph ENE 4%

Forecast source: National Weather Service (api.weather.gov) for Topeka (40.330, -89.931). Updated through the day.

Growing snapshot for Topeka

Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
185 days
Hardiness zone
6a

More local growing data for Topeka: nearby ZIP 61567 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Havana, Il (9.9 mi from Topeka). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.