Live Weather & Forecast

Weather in Lemont

Q: What is the current weather in Lemont?

Current conditions in Lemont: Partly cloudy, temperature 27°C, humidity 45%.

Q: What is the best time to visit Lemont?

The best time to visit Lemont is typically June – September. Warm, dry summers — ideal for outdoor activities.

Q: What are the GPS coordinates used for the weather forecast in Lemont?

The weather forecast for Lemont uses coordinates 41.6737, -88.0016.

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

27^°C

Feels like 27°C

81°F / Feels 81°F

Partly cloudy

Lemont, Illinois

🌞 Daytime

Updated: 2026-04-12 15:15

💧

Humidity

45%

💨

Wind

28.8 km/h SW

🌬️

Wind Gust

42.6 km/h

🌡️

Pressure

1012 mb

👁️

Visibility

16 km

☀️

UV Index

1.8 (Low)

🌧️

Precipitation

0 mm

☁️

Cloud Cover

75%

💦

Dew Point

16.1°C

🌐

Wind Degree

227°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)

173.9 μg/m³

NO₂

9.3 μg/m³

O₃

95 μg/m³

SO₂

3.1 μg/m³

PM 2.5

7.6 μg/m³

PM 10

7.9 μg/m³

Weather Alerts 5

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 12 at 10:46AM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Illinois... Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL 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...

Effective: 2026-04-12T10:46:00-05:00 · Expires: 2026-04-13T05:00:00-05:00

Met · Severe · Immediate

Flood Warning issued April 11 at 9:24PM CDT until April 14 at 1:00AM CDT by NWS Chicago IL

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

Met · Severe · Immediate

Flood Warning issued April 12 at 10:22AM CDT until April 14 at 1:00AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Porter and Jasper Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River...including Dunns Bridge...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from Near I-65 and...

Effective: 2026-04-12T10:22:00-05:00 · Expires: 2026-04-13T04:30:00-05:00

Met · Severe · Immediate

Flood Warning issued April 11 at 9:24PM CDT until April 14 at 7:00PM CDT by NWS Chicago IL

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

Today's Hourly Forecast

24-hour breakdown for Lemont, Illinois

12 AM

10°

Clear

💧 70% 💨 16.6 km/h

1 AM

10°

Clear

💧 68% 💨 14.8 km/h

2 AM

10°

Clear

💧 69% 💨 15.5 km/h

3 AM

10°

Clear

💧 74% 💨 16.6 km/h

4 AM

11°

Clear

💧 79% 💨 17.3 km/h

5 AM

12°

Clear

💧 83% 💨 18.4 km/h

6 AM

12°

Clear

💧 86% 💨 20.2 km/h

7 AM

13°

Sunny

💧 87% 💨 21.6 km/h

8 AM

15°

Sunny

💧 84% 💨 22.7 km/h

9 AM

17°

Sunny

💧 80% 💨 23.4 km/h

10 AM

21°

Sunny

💧 75% 💨 26.3 km/h

11 AM

24°

Sunny

💧 66% 💨 27.7 km/h

12 PM

26°

Sunny

💧 60% 💨 28.4 km/h

1 PM

27°

Sunny

💧 54% 💨 29.5 km/h

2 PM

28°

Sunny

💧 48% 💨 29.2 km/h

3 PM

27°

Partly cloudy

💧 45% 💨 28.8 km/h

4 PM

26°

Sunny

💧 43% 💨 24.8 km/h

5 PM

24°

Overcast

💧 63% 💨 20.2 km/h

6 PM

22°

Overcast

💧 70% 💨 15.8 km/h

7 PM

21°

Overcast

💧 84% 💨 19.4 km/h

8 PM

21°

Overcast

💧 69% 💨 26.6 km/h

9 PM

20°

Overcast

💧 70% 💨 25.2 km/h

10 PM

18°

Overcast

💧 81% 💨 27.7 km/h

11 PM

17°

Overcast

💧 97% 💨 28.4 km/h

3-Day Forecast

Daily overview for Lemont, Illinois

Today

Sunny

29° / 10°

🌧️ 0% chance of rain

💧 Avg. humidity: 71%

💨 Max wind: 29.5 km/h

🌧️ Total precip: 0 mm

☀️ UV Index: 1.1

🌅 Sunrise: 06:17 AM

🌇 Sunset: 07:30 PM

🌙 Waning Crescent

🌑 Moon: 33% lit

Mon, Apr 13

Heavy rain

23° / 16°

🌧️ 87% chance of rain

💧 Avg. humidity: 91%

💨 Max wind: 26.3 km/h

🌧️ Total precip: 21.49 mm

☀️ UV Index: 1

🌅 Sunrise: 06:15 AM

🌇 Sunset: 07:31 PM

🌙 Waning Crescent

🌑 Moon: 23% lit

Tue, Apr 14

Thundery outbreaks in nearby

26° / 19°

🌧️ 0% chance of rain

💧 Avg. humidity: 87%

💨 Max wind: 35.6 km/h

🌧️ Total precip: 0 mm

☀️ UV Index: 0.9

🌅 Sunrise: 06:13 AM

🌇 Sunset: 07:32 PM

🌙 Waning Crescent

🌑 Moon: 15% lit

Best Time to Visit Lemont

Plan your trip to Lemont, 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 Lemont 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Lemont?

Current conditions in Lemont: Partly cloudy, temperature 27°C, humidity 45%.

What is the best time to visit Lemont?

The best time to visit Lemont is typically June – September. Warm, dry summers — ideal for outdoor activities.

What is the climate like in Lemont?

Lemont is located at approximately 41.7° latitude. It has a temperate climate with warm summers and cold winters.

Does it rain a lot in Lemont?

The wettest period in Lemont is typically during November – March. Cooler temperatures; some regions may experience rain or snow.

What should I pack for a trip to Lemont?

For visits to Lemont during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.

What country is Lemont in?

Lemont is located in United States, in the state of Illinois.

What are the public holidays in Lemont in 2026?

View the 2026 public holidays for Lemont on our Holidays page.

What are the GPS coordinates used for the weather forecast in Lemont?

The weather forecast for Lemont uses coordinates 41.6737, -88.0016.