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United States, North America
Mount Prospect is located in the United States with varying weather patterns throughout the year. Plan your visit to Mount Prospectwith our accurate weather forecasts, including hourly updates, 7-day predictions, and real-time conditions. Whether you're a local or visitor, stay prepared for whatever weather the United States brings.
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United States, United States of America
Tuesday, 14 July 2026 at 21:37
Clear
Feels like 35°C
Humidity
59%
Wind
6.5 km/h W
Visibility
16 km
Pressure
1020 mb
The Illinois Environmental Protection Agency has determined that the Air Pollution Action Day will remain in effect for the greater Chicago Metropolitan Area until midnight Wednesday Night. A Chicago Area Air Pollution Action Day is declared when weather conditions are such that widespread ozone and or particulate levels are expected to be at or above the Unhealthy for Sensitive Groups category of the Air Quality Index for multiple days. Ozone is expected to be the primary pollutant of concern although smoke/PM2.5 may also become a concern later in the work week. Active children and adults, especially people with pulmonary or respiratory disease such as asthma, should limit prolonged outdoor activity. Area residents are urged to reduce pollution levels. Air quality forecasts, current air quality, and tips on how you can reduce your emissions can be found at www.airnow.gov. Media contact...Illinois EPA.
40°/ 22°
Sunny
Updated nowRain Chance
2%
Humidity
53%
Max Wind
9 km/h
Avg Temp
31°C
Sunrise
05:28 AM
Sunset
08:26 PM
06:00 am
22°
07:00 am
24°
08:00 am
27°
09:00 am
30°
10:00 am
32°
11:00 am
37°
12:00 pm
38°
01:00 pm
38°
02:00 pm
39°
03:00 pm
40°
04:00 pm
40°
05:00 pm
39°
06:00 pm
38°
07:00 pm
36°
08:00 pm
33°
09:00 pm
32°
10:00 pm
29°
11:00 pm
28°
12:00 am
25°
01:00 am
24°
02:00 am
24°
03:00 am
23°
04:00 am
22°
05:00 am
22°
Today
Wed, 15 Jul
UV Index
0 Low
Precipitation
0 mm
The officials at the Indiana Department of Environmental Management have extended the Air Quality Action Day, that is now in effect until midnight Wednesday Night. An Air Quality Action Day for ozone has been issued. Ozone levels are expected to be in the Unhealthy for Sensitive Groups range. Active children and adults, and people with respiratory disease, such as asthma should limit prolonged outdoor exposure. Here are some recommended actions that the public can take: * Walk, bike, carpool or use public transportation. * Avoid using the drive-through and combine errands into one trip. * Avoid refueling your vehicle or using gasoline-powered lawn equipment until after 7pm. * Turn off your engine when idling for more than 30 seconds. * Conserve energy by turning off lights or setting the air conditioner to 75 degrees or above. For additional information, please visit the IDEM Smog page at: http://www.in.gov/idem/airmonitoring/smogwatch/
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Mon, 27 Jul
Sun
Sunrise
05:28 AM
Sunset
08:26 PM
Moon
Moonrise
05:02 AM
Moonset
08:54 PM
Moon Phase
New Moon
Illumination
1%
Good
Air quality is satisfactory
PM2.5
9.4 μg/m³
PM10
9.5 μg/m³
Ozone (O₃)
105.0 μg/m³
NO₂
18.6 μg/m³
SO₂
2.2 μg/m³
CO
211.0 μg/m³
