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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.