New Lenox, IL Weather & Growing Conditions
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
| 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). Updated through the day.
Growing snapshot for New Lenox, IL
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
Explore more for New Lenox, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (7.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.