New Lenox, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Lenox, a village in Will County, Illinois.
Overnight
60°F
Rain Showers
Rain showers. Cloudy, with a low around 60. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for New Lenox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Rain Showers | 15 mph S | 82% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 32% |
| Wednesday Night | 47°F | Mostly Cloudy | 15 mph SW | 9% |
| Thursday | 57°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph WSW | 36% |
| Thursday Night | 42°F | Chance Rain Showers | 10 mph NW | 49% |
| Friday | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NNW | 18% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NNW | 1% |
| Saturday | 52°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 2% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WSW | 1% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for New Lenox (41.510, -87.970). Updated through the day.
Growing snapshot for New Lenox
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
More local growing data for New Lenox: nearby ZIP 60451 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (7.4 mi from New Lenox). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.