Joliet, IL Weather & Growing Conditions
Today
64°F
Scattered Rain Showers then Patchy Drizzle
Scattered rain showers before 9am, then patchy drizzle and isolated rain showers. Mostly cloudy. High near 64, with temperatures falling to around 56 in the afternoon. Southwest wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Scattered Rain Showers then Patchy Drizzle | 15 mph SW | 28% |
| Tonight | 48°F | Patchy Drizzle then Mostly Cloudy | 15 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph WSW | 35% |
| Thursday Night | 42°F | Chance Rain Showers | 10 mph NW | 48% |
| Friday | 51°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NNW | 18% |
| Friday Night | 35°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 52°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 34°F | Mostly Clear | 0 to 5 mph W | 1% |
| 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% |
| Tuesday Night | 38°F | Partly Cloudy | 0 to 5 mph NW | 0% |
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 (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.