Joliet, IL Weather & Growing Conditions
This Afternoon
70°F
Rain Showers
Rain showers. Cloudy. High near 70, with temperatures falling to around 66 in the afternoon. Northeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Rain Showers | 10 to 15 mph NE | 100% |
| Tonight | 58°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Monday | 65°F | Chance Rain Showers | 15 mph NE | 30% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Tuesday Night | 52°F | Partly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday | 65°F | Partly Sunny | 10 to 15 mph NE | 4% |
| Wednesday Night | 51°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 67°F | Mostly Sunny | 5 mph NE | 2% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph NE | 2% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 2% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Saturday | 72°F | Mostly Sunny | 0 to 5 mph ENE | 1% |
| Saturday Night | 52°F | Partly Cloudy | 0 to 5 mph ENE | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Joliet, IL
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
Explore more for Joliet, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.