Live Weather & Forecast

Weather in Mount Prospect

Illinois, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
14°C
Feels like 13°C
58°F / Feels 55°F
Sunny
Mount Prospect, Illinois
🌞 Daytime
Updated: 2026-04-12 07:45
💧
Humidity
78%
💨
Wind
18.7 km/h S
🌬️
Wind Gust
32.7 km/h
🌡️
Pressure
1016 mb
👁️
Visibility
16 km
☀️
UV Index
0.1 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
25%
💦
Dew Point
10.2°C
🌐
Wind Degree
185°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
195.9 μg/m³
NO₂
7.4 μg/m³
O₃
102 μg/m³
SO₂
4.7 μg/m³
PM 2.5
8.5 μg/m³
PM 10
8.8 μg/m³

Weather Alerts 5

Met · Severe · Immediate
Flood Warning issued April 11 at 10:46AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, Lake IL and McHenry Counties. For the Fox River (Illinois)...including Algonquin Lock & Dam tailwater...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Fox River from Johnsburg downstream to Red Gate Road...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T10:46:00-05:00  ·  Expires: 2026-04-12T05:00:00-05:00
Met · Severe · Immediate
Flood Warning issued April 11 at 10:43AM CDT until April 12 at 7:00AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. For the Des Plaines River...including Gurnee...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Des Plaines River from IL/WI state line downstream to US...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T10:43:00-05:00  ·  Expires: 2026-04-12T04:45:00-05:00
Met · Severe · Immediate
Flood Warning issued April 11 at 10:43AM CDT until April 12 at 1:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River near Russell affecting Lake IL County. For the Des Plaines River...including Gurnee...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Des Plaines River from US-41 in Gurnee downstream to Tow...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T10:43:00-05:00  ·  Expires: 2026-04-12T04:45:00-05:00
Met · Severe · Immediate
Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T21:24:00-05:00  ·  Expires: 2026-04-12T15:30:00-05:00
Met · Severe · Immediate
Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois...Indiana... Fox River at Algonquin Lock & Dam tailwater affecting Lake IL, McHenry and Kane Counties. Kankakee River at Dunns Bridge affecting Jasper and Porter Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. ...The Flood Warning is extended for the following rivers in Illinois... Des Plaines River...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-11T21:24:00-05:00  ·  Expires: 2026-04-12T15:30:00-05:00

Today's Hourly Forecast

24-hour breakdown for Mount Prospect, Illinois

12 AM
Clear
11°
Clear
💧 60% 💨 13.7 km/h
1 AM
Clear
11°
Clear
💧 60% 💨 11.9 km/h
2 AM
Clear
11°
Clear
💧 62% 💨 12.6 km/h
3 AM
Clear
11°
Clear
💧 63% 💨 13.3 km/h
4 AM
Clear
12°
Clear
💧 66% 💨 14.8 km/h
5 AM
Clear
12°
Clear
💧 75% 💨 15.8 km/h
6 AM
Clear
13°
Clear
💧 82% 💨 16.9 km/h
7 AM
Sunny
14°
Sunny
💧 78% 💨 18.7 km/h
8 AM
Sunny
17°
Sunny
💧 74% 💨 20.2 km/h
9 AM
Sunny
19°
Sunny
💧 66% 💨 20.9 km/h
10 AM
Sunny
22°
Sunny
💧 61% 💨 20.5 km/h
11 AM
Sunny
25°
Sunny
💧 56% 💨 23.8 km/h
12 PM
Sunny
27°
Sunny
💧 53% 💨 24.5 km/h
1 PM
Sunny
27°
Sunny
💧 47% 💨 26.3 km/h
2 PM
Sunny
29°
Sunny
💧 45% 💨 26.3 km/h
3 PM
Sunny
28°
Sunny
💧 44% 💨 26.6 km/h
4 PM
Sunny
26°
Sunny
💧 47% 💨 26.3 km/h
5 PM
Overcast
24°
Overcast
💧 62% 💨 21.6 km/h
6 PM
Overcast
21°
Overcast
💧 66% 💨 18 km/h
7 PM
Light rain
21°
Light rain
💧 93% 💨 15.1 km/h 🌧️ 100%
8 PM
Overcast
20°
Overcast
💧 78% 💨 16.9 km/h
9 PM
Overcast
19°
Overcast
💧 90% 💨 22.3 km/h
10 PM
Moderate rain
18°
Moderate rain
💧 86% 💨 24.8 km/h 🌧️ 100%
11 PM
Overcast
18°
Overcast
💧 95% 💨 25.2 km/h

3-Day Forecast

Daily overview for Mount Prospect, Illinois

Today
Moderate rain
Moderate rain
30° / 11°
🌧️ 79% chance of rain
💧 Avg. humidity: 67%
💨 Max wind: 26.6 km/h
🌧️ Total precip: 7.68 mm
☀️ UV Index: 1
🌅 Sunrise: 06:16 AM
🌇 Sunset: 07:30 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
Moderate rain
24° / 16°
🌧️ 80% chance of rain
💧 Avg. humidity: 87%
💨 Max wind: 25.9 km/h
🌧️ Total precip: 13.24 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:14 AM
🌇 Sunset: 07:31 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
Thundery outbreaks in nearby
29° / 19°
🌧️ 0% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 25.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:12 AM
🌇 Sunset: 07:32 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit Mount Prospect

Plan your trip to Mount Prospect, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Mount Prospect 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Mount Prospect?
Current conditions in Mount Prospect: Sunny, temperature 14°C, humidity 78%.
What is the best time to visit Mount Prospect?
The best time to visit Mount Prospect is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mount Prospect?
Mount Prospect is located at approximately 42.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mount Prospect?
The wettest period in Mount Prospect is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mount Prospect?
For visits to Mount Prospect during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mount Prospect in?
Mount Prospect is located in United States, in the state of Illinois.
What are the public holidays in Mount Prospect in 2026?
View the 2026 public holidays for Mount Prospect on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mount Prospect?
The weather forecast for Mount Prospect uses coordinates 42.0664, -87.9373.