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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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.