Topeka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topeka, a village in Mason County, Illinois.
This Afternoon
58°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a high near 58. West southwest wind 9 to 14 mph, with gusts as high as 23 mph.
7-day forecast for Topeka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Slight Chance Drizzle | 9 to 14 mph WSW | 10% |
| Tonight | 46°F | Patchy Drizzle then Cloudy | 9 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy then Chance Light Rain | 7 to 13 mph W | 27% |
| Thursday Night | 40°F | Slight Chance Light Rain then Mostly Cloudy | 6 to 9 mph NNW | 20% |
| Friday | 51°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 30°F | Mostly Clear | 0 to 3 mph NNW | 0% |
| Saturday | 53°F | Sunny | 0 to 3 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 1 mph WNW | 0% |
| Sunday | 60°F | Sunny | 1 to 5 mph W | 0% |
| Sunday Night | 34°F | Clear | 2 mph W | 0% |
| Monday | 65°F | Sunny | 0 to 7 mph SW | 0% |
| Monday Night | 38°F | Clear | 1 to 5 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 2 mph WNW | 2% |
| Tuesday Night | 38°F | Mostly Clear | 1 mph N | 2% |
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 Nov 4, 2026.