🇺🇸 Weather in Joliet
Current Weather in Joliet
Extreme Heat Warning issued September 3 at 10:14AM CDT until September 3 at 7:00PM CDT by NWS Chicago IL
29°C
Feels like 32°C. Patchy rain nearby.
Map Overlays:
Hourly Forecast for Joliet
22:00
28°
14%
23:00
27°
7%
00:00
27°
6%
01:00
27°
5%
02:00
27°
5%
03:00
28°
4%
04:00
28°
13%
05:00
28°
11%
06:00
28°
4%
07:00
26°
6%
08:00
26°
7%
09:00
26°
6%
10:00
26°
7%
11:00
28°
7%
12:00
30°
3%
13:00
31°
2%
14:00
32°
2%
15:00
32°
2%
16:00
32°
3%
17:00
31°
4%
18:00
30°
6%
19:00
30°
19%
20:00
29°
20%
21:00
28°
20%
14-Day Forecast for Joliet
2026-09-03
Sunny
37° /
24°
2026-09-04
Sunny
32° /
26°
2026-09-05
Sunny
30° /
22°
2026-09-06
Sunny
26° /
19°
2026-09-07
Sunny
25° /
17°
2026-09-08
Overcast
28° /
16°
2026-09-09
Cloudy
30° /
22°
Additional Forecasts for Joliet
Air Quality
💨 US EPA Index 1 (Good)
CO (Carbon Monoxide) 197.0 μg/m³
O₃ (Ozone) 70.0 μg/m³
NO₂ (Nitrogen Dioxide) 21.6 μg/m³
SO₂ (Sulphur Dioxide) 1.9 μg/m³
PM2.5 (Fine particles) 10.7 μg/m³
PM10 (Coarse particles) 11.6 μg/m³
Historical Weather
Weather Forecasts for Other Cities in United States
Weather in Joliet — FAQ
Answers refreshed each request based on current conditions in Joliet.
What is the weather like right now in Joliet?
Right now in Joliet, United States the temperature is 28.7°C (feels like 31.8°C), with patchy rain nearby. Relative humidity is 68% and wind is 12.6 km/h.
What is today's high and low temperature in Joliet?
Today's forecast high in Joliet is 37.4°C and the overnight low is 23.6°C. The diurnal range — high minus low — depends on cloud cover; clear days swing more than overcast ones.
Will it rain in Joliet today?
The chance of precipitation in Joliet today is 8%. Forecast accuracy is highest within the next 6 hours and decreases steadily out to 14 days.
How often does the weather here update?
Current observations refresh every 15-60 minutes from the nearest monitoring stations operated by national meteorological agencies. The hourly forecast updates approximately every hour; the 7- and 14-day outlook is recomputed several times per day.
What does 'feels like' temperature mean?
Feels-like (apparent) temperature accounts for humidity, wind chill and direct sunshine — variables that change how the human body perceives heat or cold. On hot, humid days it can be 3-7°C above the actual reading; on cold windy days it can be 5-15°C below.
Why does the temperature in Joliet differ from nearby cities?
Even short distances can change temperatures noticeably. Joliet's reading reflects altitude, proximity to large bodies of water, urban heat island effects, and the exact location of the monitoring stations supplying the data. Coastal cities are typically milder and more humid than inland equivalents.