Live Weather & Forecast

Weather in Algonquin

Q: What is the current weather in Algonquin?

Current conditions in Algonquin: Partly cloudy, temperature 12°C, humidity 59%.

Q: What is the best time to visit Algonquin?

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

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

The weather forecast for Algonquin uses coordinates 42.1656, -88.2942.

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

12^°C

Feels like 10°C

53°F / Feels 50°F

Partly cloudy

Algonquin, Illinois

🌙 Nighttime

Updated: 2026-04-11 21:30

💧

Humidity

59%

💨

Wind

15.5 km/h ESE

🌬️

Wind Gust

28.4 km/h

🌡️

Pressure

1023 mb

👁️

Visibility

16 km

☀️

UV Index

0 (Low)

🌧️

Precipitation

0.22 mm

☁️

Cloud Cover

75%

💦

Dew Point

4.4°C

🌐

Wind Degree

121°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)

230.9 μg/m³

NO₂

6.3 μg/m³

O₃

86 μg/m³

SO₂

3.7 μg/m³

PM 2.5

9.3 μg/m³

PM 10

9.8 μg/m³

Weather Alerts 3

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...

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

Effective: 2026-04-11T10:43:00-05:00 · Expires: 2026-04-12T04:45:00-05:00

Today's Hourly Forecast

24-hour breakdown for Algonquin, Illinois

12 AM

3°

Clear

💧 89% 💨 9 km/h

1 AM

3°

Clear

💧 91% 💨 7.9 km/h

2 AM

2°

Clear

💧 88% 💨 8.3 km/h

3 AM

2°

Clear

💧 86% 💨 8.6 km/h

4 AM

2°

Clear

💧 85% 💨 6.8 km/h

5 AM

1°

Clear

💧 85% 💨 7.2 km/h

6 AM

0°

Freezing fog

💧 99% 💨 8.3 km/h

7 AM

2°

Freezing fog

💧 98% 💨 7.9 km/h

8 AM

4°

Partly Cloudy

💧 91% 💨 9 km/h

9 AM

7°

Sunny

💧 78% 💨 11.9 km/h

10 AM

8°

Sunny

💧 64% 💨 13.7 km/h

11 AM

10°

Sunny

💧 61% 💨 12.2 km/h

12 PM

11°

Sunny

💧 46% 💨 10.4 km/h

1 PM

13°

Sunny

💧 42% 💨 10.8 km/h

2 PM

15°

Sunny

💧 33% 💨 15.5 km/h

3 PM

14°

Sunny

💧 38% 💨 15.8 km/h

4 PM

15°

Sunny

💧 37% 💨 13.7 km/h

5 PM

15°

Sunny

💧 40% 💨 11.9 km/h

6 PM

14°

Sunny

💧 49% 💨 11.9 km/h

7 PM

12°

Sunny

💧 60% 💨 11.5 km/h

8 PM

11°

Patchy rain nearby

💧 65% 💨 11.2 km/h 🌧️ 100%

9 PM

12°

Partly cloudy

💧 59% 💨 15.5 km/h 🌧️ 100%

10 PM

10°

Clear

💧 73% 💨 12.2 km/h

11 PM

9°

Clear

💧 75% 💨 14 km/h

3-Day Forecast

Daily overview for Algonquin, Illinois

Today

Patchy rain nearby

16° / -1°

🌧️ 86% chance of rain

💧 Avg. humidity: 69%

💨 Max wind: 15.8 km/h

🌧️ Total precip: 0.3 mm

☀️ UV Index: 1.3

🌅 Sunrise: 06:19 AM

🌇 Sunset: 07:31 PM

🌙 Waning Crescent

🌑 Moon: 42% lit

Sun, Apr 12

Thundery outbreaks in nearby

25° / 9°

🌧️ 0% chance of rain

💧 Avg. humidity: 81%

💨 Max wind: 35.6 km/h

🌧️ Total precip: 0.08 mm

☀️ UV Index: 0.9

🌅 Sunrise: 06:17 AM

🌇 Sunset: 07:32 PM

🌙 Waning Crescent

🌑 Moon: 33% lit

Mon, Apr 13

Heavy rain

26° / 16°

🌧️ 89% chance of rain

💧 Avg. humidity: 85%

💨 Max wind: 30.2 km/h

🌧️ Total precip: 45.81 mm

☀️ UV Index: 1.1

🌅 Sunrise: 06:15 AM

🌇 Sunset: 07:33 PM

🌙 Waning Crescent

🌑 Moon: 23% lit

Best Time to Visit Algonquin

Plan your trip to Algonquin, 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 Algonquin 🗓 View Holidays 2026

Frequently Asked Questions

People also ask — answers optimized for search engines and voice queries.

What is the current weather in Algonquin?

Current conditions in Algonquin: Partly cloudy, temperature 12°C, humidity 59%.

What is the best time to visit Algonquin?

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

What is the climate like in Algonquin?

Algonquin is located at approximately 42.2° latitude. It has a temperate climate with warm summers and cold winters.

Does it rain a lot in Algonquin?

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

What should I pack for a trip to Algonquin?

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

What country is Algonquin in?

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

What are the public holidays in Algonquin in 2026?

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

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

The weather forecast for Algonquin uses coordinates 42.1656, -88.2942.