Algonquin, IL Weather Forecast
McHenry County, Illinois
Live radar, warnings and storm tracking for Algonquin, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Algonquin
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Algonquin, IL at a glance
Algonquin is home to about 30,134 people in McHenry County, across 13 square miles. It ranks 65th by population of 441 places in Illinois with a forecast here. The nearest neighbour with its own forecast is Lake in the Hills, 1 miles away.
- County
- McHenry County
- Population
- 30,134 2023 est.
- Land area
- 13 sq mi
- People per sq mi
- 2,403
- Forecast point
- 42.1595°N, 88.3219°W
How well can the network see Algonquin?
The nearest Doppler radar is KLOT (Chicago, IL), to the SSE. Its lowest scan passes about 2,700 ft above Algonquin. Close enough to see rotation in the low part of a storm, where tornadoes form. Algonquin is closer to its radar than 56% of US cities.
The closest weather station is K06C (Schaumburg Rgnl). Far enough that current conditions for Algonquin are a reading from somewhere else.
Forecasts near Algonquin
- Lake in the Hills, IL1 mi
- Carpentersville, IL3 mi
- West Dundee, IL4 mi
- Gilberts, IL4 mi
- Sleepy Hollow, IL5 mi
- Crystal Lake, IL5 mi
- Cary, IL5 mi
- Lakewood, IL6 mi
Elsewhere in Illinois
ChicagoAuroraJolietNapervilleRockfordElginAll Illinois forecasts →

