Algonquin

Lincoln County, Illinois, United States

Unlock Minute-by-Minute Forecast

See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.

Current Weather

17°

Overcast

Feels Like: 17°

Min: 17°

Max: 24°

The next few hours will be overcast, with today reaching 24°C and dropping to 18°C. The coming days will be mostly cloudy throughout the day.

Unlock Historical Data

Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

17° 17° 18° 19° 21° 22° 24° 24° 24° 24° 23° 23° 22° 21° 19° 18° 18° 19° 19° 19° 19° 19° 19° 19°
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm
11pm
12am
1am
2am
3am
4am
5am
Today
Tomorrow

Daylight Hours

06:40

Sunrise

18:53

Sunset

12 hours 13 minutes of sunlight today

Moon

Waxing Crescent

12:41

Moonrise

20:54

Moonset

Daily Forecast

Today

17°
24°

Thursday

18°
23°

Friday

16°
22°

Saturday

18°
25°

Sunday

17°
19°

Monday

15°
19°

Tuesday

15°
20°

Wednesday

15°
22°

Thursday

14°
20°

Friday

16°
21°

Air Quality Data Available

Upgrade to access real-time air quality data for Algonquin.

UV Index

No protection needed
0 Low
Low Extreme

Humidity

88% Humid
Low High

Weather in Algonquin today, September 16, 2026

Misty spells are likely in Algonquin on September 16, 2026, especially during quieter hours. The day can open dull before any clearer intervals arrive. The first half of the day looks overcast, as cloud amounts reach about 100% around 06:00. Brighter weather, if it comes, waits until later.

The day peaks near 24°C and cools toward 17°C. The air stays humid, with relative humidity between 64% and 100% and the peak around 23:00. Expect gentle winds, highest near 19:00 at 3.7 km/h.

Through the afternoon cloud remains the main feature, with cover near 100% around 12:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 15.6 km, briefly nearer 7.9 km. Sunrise is at 06:40 and sunset at 18:53, giving 12 hours 13 minutes of sunlight today.

In short, fog or mist is the watchpoint in Algonquin on September 16, 2026; leave extra time for travel around a high of 24°C.

Frequently asked questions about weather in Algonquin

How warm does it get in Algonquin?

The warmest month in Algonquin is July, with average high temperatures of 28°C. The average temperature during this period is around 24°C.

How cold does it get in Algonquin?

The coldest month in Algonquin is January, with average low temperatures of -7°C. The average temperature during this period is around -4°C.

What is the wettest time of year in Algonquin?

The wettest month in Algonquin is May, with an average of 123mm of precipitation.

What is the driest time of year in Algonquin?

The driest month in Algonquin is February, with an average of 49mm of precipitation.

View full climate insights for Algonquin →

Airpult

Get accurate weather forecasts worldwide with real-time updates and severe weather alerts. Covering 6M+ locations with precise, reliable weather data.

© 2026 Samuenti GmbH. All rights reserved.

gb English
Metric (°C, km/h)