Joliet, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Joliet, a city in Will County, Illinois.
This Afternoon
75°F
Rain Showers Likely
Rain showers likely. Partly sunny. High near 75, with temperatures falling to around 73 in the afternoon. East wind 10 to 15 mph. Chance of precipitation is 60%.
7-day forecast for Joliet
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Rain Showers Likely | 10 to 15 mph E | 59% |
| Tonight | 64°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph E | 39% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 77% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NNW | 82% |
| Sunday | 71°F | Showers And Thunderstorms | 10 to 15 mph NNE | 82% |
| Sunday Night | 58°F | Rain Showers Likely | 15 mph NE | 69% |
| Monday | 66°F | Rain Showers Likely | 15 mph ENE | 58% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph NE | 32% |
| Tuesday | 65°F | Chance Rain Showers | 10 mph NE | 27% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Wednesday Night | 54°F | Mostly Cloudy | 0 to 10 mph NNE | 5% |
| Thursday | 70°F | Partly Sunny | 5 mph NNE | 5% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 5 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Joliet (41.518, -88.149). Updated through the day.
Growing snapshot for Joliet
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
More local growing data for Joliet: nearby ZIP 60435 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (3.4 mi from Joliet). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.