Weather Forecast for Chicago

Illinois, United States of America

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Overcast

Current Weather - Chicago: 10°C

Illinois, United States of America

Overcast

Feels like 7°C

Wind

21 km/h SSW

Humidity

44%

Pressure

1018 mb

UV Index

0

Visibility

16 km

Patchy rain nearby

Patchy rain nearby

Tuesday, April 21, 2026

High

22°C

Low

9°C

Rain Chance

92%

Hourly Forecast

Sunny 14°C
10:00
Sunny 17°C
11:00
Sunny 19°C
12:00
Sunny 20°C
13:00
Sunny 21°C
14:00
Sunny 20°C
15:00
Patchy rain nearby 19°C
16:00
Light rain shower 18°C
17:00
Light rain shower 17°C
18:00
Light rain shower 16°C
19:00
Light rain shower 16°C
20:00
Patchy rain nearby 15°C
21:00
Mist 15°C
22:00
Mist 15°C
23:00
Apr 22

Day Statistics

Maximum Wind

26 km/h

Humidity

67%

Precipitation

3 mm

UV Index

6

Visibility

9 km

Rain Chance

92%

Snow Chance

0%

Sun & Moon

Sunrise

06:01 AM

Sunset

07:38 PM

Moonrise

08:49 AM

Moonset

12:14 AM

Moon Phase

Waxing Crescent

Moon Illumination

17%

Air Quality

PM2.5

9.4

μg/m³

PM10

9.7

μg/m³

NO₂

15.2

μg/m³

O₃

89.7

μg/m³

SO₂

5.6

μg/m³

CO

205.3

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Weather Alerts

Flood Warning issued April 20 at 11:36AM CDT by NWS Chicago IL

Cook, IL; Lake, IL Apr 20, 11:36 AM - Apr 21, 05:45 AM
Severity: Severe Urgency: Immediate

...The Flood Warning is extended for the following rivers in Illinois... Kishwaukee River near Perryville affecting Winnebago County. ...The Flood Warning continues for the following rivers in Illinois... Rock River at Byron affecting Ogle County. Illinois River at La Salle affecting La Salle, Bureau and Putnam Counties. Pecatonica River near Shirland affecting Winnebago County. Rock River at Rockton affecting Winnebago County. Rock River at Latham Park affecting Winnebago County. Fox River at Montgomery affecting Kendall and Kane Counties. Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. ...Observed flooding changed to Minor severity for the following rivers in Illinois... Rock River at Dixon affecting Lee and Ogle Counties. * WHAT...Moderate flooding is occurring and moderate flooding is forecast. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until further notice. * IMPACTS...At 15.0 feet, Structures threatened along IL-22 (Half-Day Road) just east of the river. Multiple structures threatened near and west of US-45 (Milwaukee Avenue) and Deerfield Road. Deerfield Road threatened near the river. Multiple trails inundated in Half-Day Forest Preserve. * ADDITIONAL DETAILS... - At 10:45 AM CDT Monday the stage was 15.2 feet. - Recent Activity...The river is currently cresting near 15.2 feet. - Forecast...The river is expected to begin a slow fall by tomorrow. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood

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 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by this evening.

Event: Flood Warning Certainty: Observed Category: Met

Flood Warning issued April 20 at 9:08PM CDT by NWS Chicago IL

Cook, IL; Lake, IL Apr 20, 09:08 PM - Apr 21, 03:15 PM
Severity: Severe Urgency: Immediate

...The Flood Warning continues for the following rivers in Illinois... Des Plaines River at Lincolnshire affecting Cook and Lake IL Counties. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. * WHAT...Moderate flooding is occurring and forecasted to continue. * WHERE...Des Plaines River from Townline Road in Libertyville downstream to Palatine Road in Prospect Heights, including the Lincolnshire gauge. * WHEN...Until further notice. * IMPACTS...At 15.0 feet, Structures threatened along IL-22 (Half-Day Road) just east of the river. Multiple structures threatened near and west of US-45 (Milwaukee Avenue) and Deerfield Road. Deerfield Road threatened near the river. Multiple trails inundated in Half-Day Forest Preserve. * ADDITIONAL DETAILS... - At 8:45 PM CDT Monday the stage was 15.1 feet. - Forecast...The river has crested, and now will gradually fall through the week. - Flood stage is 12.5 feet. - http://www.weather.gov/safety/flood

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 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by Tuesday afternoon.

Event: Flood Warning Certainty: Observed Category: Met

Flood Warning issued April 20 at 4:39PM CDT until April 29 at 1:00PM CDT by NWS Chicago IL

Lake, IL; McHenry, IL Apr 20, 04:39 PM - Apr 29, 01:00 PM
Severity: Severe Urgency: Expected

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northeast Illinois, including the following counties, Lake IL and McHenry. * WHEN...Until further notice. * IMPACTS...Numerous roads, yards, structures, and park land are expected to flood along the Fox River Chain of Lakes. * ADDITIONAL DETAILS... - At 438 PM CDT, River gauges along the Fox River Chain of Lakes indicated water levels continuing to rise slowly. Water levels exceeded moderate flood stage earlier today. The latest forecast from the Illinois Department of Natural Resources indicates that water levels may near major flood stage by the middle of this week. - Water levels are expected to remain above flood stage at least through the middle of next week, assuming no additional rainfall occurs. Impacts from this flood may be similar to those experienced in May of 1973, October of 1986, or June of 2008. - Some locations that will experience flooding include areas along the Fox River Chain of Lakes, including Nippersink Lake, Fox Lake, Pistakee Lake, Petite Lake, Lake Marie, Channel Lake, and Lake Catherine. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Event: Flood Warning Certainty: Likely Category: Met