Today | Weather | Tuesday, April 7, 2026
Active Weather Warnings

Weather in Elgin, Illinois

08:45 AM
Now
Cloudy Weather
32° F
Feels Like 27°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 2
Humidity 55 %
Today
Cloudy Weather
Day 43°
Night 34°
Precipitation 1 %
Wind 10 mph
UV Index (0 - 11+) 6
Overnight Frost 4 AM – 4 AM

Elgin Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)
Snowy Weather

Day

41°

Night

21°

Wind

16 mph

UV Index

3

Precipitation

90 %

Air Quality in Elgin

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.02 µg/m³
PM10 1.73 µg/m³
O3 0.043 ppm
NO2 2.7 ppb
SO2 0.9 ppb
CO 0.14 ppm
NH3 4.82 µg/m³
NO 0.76 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.51.02 µg/m³
PM101.73 µg/m³
O384.96 µg/m³
NO25.02 µg/m³
SO22.38 µg/m³
CO158.69 µg/m³
NH34.82 µg/m³
NO0.76 µg/m³

Weather Alerts and Warnings for Elgin

Severe Expected Likely

Flood Warning

Flood Warning issued April 6 at 8:26PM CDT until April 11 at 7:00PM CDT by NWS Chicago IL
Apr 7, 1:00 PM Apr 11, 7:00 PM
...The National Weather Service in Chicago IL has issued a Flood
Warning for the following rivers in Illinois...

Fox River at Algonquin Lock & Dam tailwater affecting McHenry,
Lake IL and Kane Counties.

WHAT: Minor flooding is forecast.

WHERE: Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.

WHEN: From Tuesday afternoon to Saturday evening.

IMPACTS: At 9.5 feet, Fox River Drive threatened in East Dundee.
Boathouses threatened along the river in Cary.

ADDITIONAL DETAILS:
- At 7:30 PM CDT Monday the stage was 9.4 feet.
- Forecast...The river is expected to rise above flood stage
Tuesday afternoon to a crest of 9.7 feet Wednesday evening.
It will then fall below flood stage early Saturday afternoon.
- Flood stage is 9.5 feet.
- http://www.weather.gov/safety/flood
+ Read More
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.
Updated: Apr 7, 7:33 AM Source: NWS Alert
Severe Future Possible

Flood Watch

Flood Watch issued April 6 at 10:24AM CDT until April 12 at 7:00AM CDT by NWS Chicago IL
Apr 7, 1:00 PM Apr 12, 7:00 AM
...The Flood Watch continues for the following rivers in Illinois...

Fox River at Algonquin Lock & Dam tailwater affecting Kane,
McHenry and Lake IL Counties.

...The Flood Watch is extended for the following rivers in
Illinois...

Des Plaines River at Lincolnshire affecting Northern Cook and
Lake IL zones.

For the Fox River (Illinois)...including Algonquin Lock & Dam
tailwater, Montgomery, Dayton...flooding is possible.

WHAT: Flooding is possible.

WHERE: Fox River from Johnsburg downstream to Red Gate Road in
St. Charles, including the Algonquin Lock & Dam tailwater gauge.

WHEN: From Tuesday afternoon to Sunday morning.

IMPACTS: At 9.5 feet, Fox River Drive threatened in East Dundee.
Boathouses threatened along the river in Cary.

ADDITIONAL DETAILS:
- At 9:30 AM CDT Monday the stage was 9.3 feet.
- Forecast...Flood stage may be reached early tomorrow
afternoon.
- Flood stage is 9.5 feet.
- http://www.weather.gov/safety/flood
+ Read More
A Flood Watch means water levels above flood stage are possible, but not yet certain, based upon the latest forecasts. Persons along rivers and streams in the watch area should monitor the latest forecasts and be prepared to take action should flooding develop. 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 late tonight.
Updated: Apr 6, 6:36 PM Source: NWS Alert