Topeka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Topeka, a village in Mason County, Illinois.
Overnight
55°F
Chance Light Rain
A chance of rain before 4am. Mostly cloudy, with a low around 55. South southwest wind around 12 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Topeka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Chance Light Rain | 12 mph SSW | 36% |
| Wednesday | 59°F | Cloudy | 10 to 15 mph WSW | 11% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 mph WSW | 4% |
| Thursday | 59°F | Mostly Cloudy then Slight Chance Light Rain | 9 to 13 mph W | 16% |
| Thursday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 5 to 8 mph NW | 19% |
| Friday | 53°F | Partly Sunny | 6 to 9 mph N | 5% |
| Friday Night | 32°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Saturday | 53°F | Sunny | 3 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 1 mph WNW | 1% |
| Sunday | 60°F | Sunny | 1 to 6 mph W | 1% |
| Sunday Night | 34°F | Clear | 2 mph WSW | 1% |
| Monday | 64°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 3 mph WSW | 0% |
| Tuesday | 66°F | Sunny | 3 mph WNW | 1% |
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.