Today | Weather | Monday, April 27, 2026
Active Weather Warnings

Weather in Elgin, Illinois

12:34 PM
Now
Rainy Weather
63° F
Feels Like 55°
Precipitation 85 %
Wind 12 mph
UV Index (0 - 11+) 2
Humidity 85 %
Today
Stormy Weather
Day 68°
Night 50°
Precipitation 100 %
Wind 16 mph
UV Index (0 - 11+) 2

Elgin Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Sunny Weather

Day

68°

Night

50°

Wind

9 mph

UV Index

8

Precipitation

1 %

Air Quality in Elgin

NOW
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.94 µg/m³
PM10 5.04 µg/m³
O3 0.043 ppm
NO2 1.1 ppb
SO2 0.4 ppb
CO 0.13 ppm
NH3 1.58 µg/m³
NO 0.16 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)
PM2.54.94 µg/m³
PM105.04 µg/m³
O384.7 µg/m³
NO22.09 µg/m³
SO21.06 µg/m³
CO145.98 µg/m³
NH31.58 µg/m³
NO0.16 µg/m³

Weather Alerts and Warnings for Elgin

Severe Immediate Observed

Flood Warning

Flood Warning issued April 26 at 8:29PM CDT by NWS Chicago IL
Apr 26, 8:29 PM Apr 27, 2:30 PM
...The Flood Warning continues for the following rivers in
Illinois...

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

WHAT: Moderate flooding is occurring and is forecasted to
continue.

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

WHEN: Until further notice.

IMPACTS: At 12.0 feet, structures threatened along River Street,
Johnson Street, and Maiden Lane in East Dundee. North Harrison
Street threatened near Riverside Park in Algonquin. Washington
Street threatened in Carpentersville. Water Street, Edwards
Avenue, and Elgin Avenue threatened in East Dundee. Bayview Road
threatened in Elgin. Low-lying areas of Festival Park are
threatened in Elgin.

ADDITIONAL DETAILS:
- At 7:30 PM CDT Sunday, the stage was 11.8 feet.
- Forecast...The river is expected to gradually fall over the
next several days, but will remain above flood stage through
this week.
- 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 Monday afternoon.
Updated: Apr 27, 10:54 AM Source: NWS Alert