Lenzburg, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lenzburg, a village in St. Clair County, Illinois.
Tonight
55°F
Light Rain Likely
Rain likely before 3am, then a slight chance of drizzle. Mostly cloudy, with a low around 55. Southwest wind 7 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
7-day forecast for Lenzburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Light Rain Likely | 7 to 13 mph SW | 56% |
| Wednesday | 65°F | Mostly Cloudy | 6 to 12 mph W | 8% |
| Wednesday Night | 43°F | Mostly Clear | 5 mph W | 0% |
| Thursday | 67°F | Sunny | 3 to 9 mph W | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph NW | 6% |
| Friday | 59°F | Mostly Cloudy | 5 to 10 mph NW | 4% |
| Friday Night | 39°F | Partly Cloudy | 5 mph N | 1% |
| Saturday | 57°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 63°F | Sunny | 1 to 6 mph W | 6% |
| Sunday Night | 36°F | Mostly Clear | 2 mph NW | 5% |
| Monday | 67°F | Sunny | 1 to 6 mph W | 2% |
| Monday Night | 40°F | Mostly Clear | 2 mph SW | 0% |
| Tuesday | 70°F | Sunny | 5 mph W | 0% |
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 Nov 4, 2026.