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Lenzburg, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Lenzburg, a village in St. Clair County, Illinois.

Overnight
72°F
Clear
Clear, with a low around 72. South wind around 5 mph.

7-day forecast for Lenzburg

WhenTempForecastWindPrecip
Overnight 72°F Clear 5 mph S 3%
Saturday 98°F Mostly Sunny 3 to 7 mph SW 3%
Saturday Night 72°F Partly Cloudy 5 mph S 3%
Sunday 94°F Mostly Sunny then Slight Chance Showers And Thunderstorms 5 mph W 19%
Sunday Night 67°F Slight Chance Showers And Thunderstorms 5 to 8 mph N 53%
Monday 80°F Showers And Thunderstorms Likely 5 to 10 mph N 63%
Monday Night 58°F Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms 6 to 10 mph N 63%
Tuesday 72°F Slight Chance Showers And Thunderstorms then Partly Sunny 8 to 12 mph N 24%
Tuesday Night 54°F Mostly Cloudy 5 to 12 mph N 7%
Wednesday 74°F Mostly Sunny 6 to 9 mph N 2%
Wednesday Night 54°F Partly Cloudy 2 to 7 mph N 0%
Thursday 76°F Mostly Sunny 3 to 7 mph N 1%
Thursday Night 56°F Partly Cloudy 2 to 6 mph NE 5%
Friday 77°F Mostly Sunny 2 to 7 mph NE 5%

Forecast source: National Weather Service (api.weather.gov) for Lenzburg (38.286, -89.818). Updated through the day.

Growing snapshot for Lenzburg

Last spring frost
Apr 12
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6b

More local growing data for Lenzburg: nearby ZIP 62255 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Sparta 1 W, Il (14 mi from Lenzburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.