Topeka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topeka, a village in Mason County, Illinois.
Tonight
70°F
Partly Cloudy
Partly cloudy, with a low around 70. East southeast wind around 8 mph, with gusts as high as 16 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Topeka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Partly Cloudy | 8 mph ESE | 8% |
| Saturday | 89°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph S | 16% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 3 to 7 mph ESE | 48% |
| Sunday | 79°F | Rain Showers Likely | 2 to 8 mph N | 66% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 7 to 10 mph NE | 66% |
| Monday | 68°F | Showers And Thunderstorms Likely | 10 mph NE | 66% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 9 mph NE | 45% |
| Tuesday | 65°F | Chance Rain Showers | 9 mph NE | 27% |
| Tuesday Night | 51°F | Mostly Cloudy | 3 to 7 mph NNE | 5% |
| Wednesday | 69°F | Mostly Sunny | 6 mph NNE | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 1 to 5 mph NNE | 1% |
| Thursday | 70°F | Mostly Sunny | 5 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 3 mph NNE | 3% |
| Friday | 72°F | Mostly Sunny | 5 mph NE | 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.