Saturday, October 4, 2025

Chicago weather: 90-degree heat returns this week

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Chicago Weather Update

Current Weather Conditions

The weekend was dominated by hazy skies and poor air quality due to wildfire smoke blanketing the Great Lakes Region. An Air Quality Alert remains in effect until midnight for the following counties: McHenry, Lake (IL), Kane, DuPage, Cook, Kendall, Grundy, Will, Lake (IN), Porter, Newton, Jasper.

Tonight will be mostly clear with lows ranging from the upper 50s to the mid 60s. The warmest temperatures will be found in the Chicago metro and along the lakefront.

Full Forecast

Monday is expected to be mostly sunny, although some haze will linger due to wildfire smoke.

Temperatures will be warm in the low to mid 80s. Tuesday looks very similar, although there is a small chance of a stray shower Tuesday afternoon. Most areas will end up staying dry.

Heat Wave Ahead

The heat returns Wednesday with highs in the upper 80s to near 90 degrees. Skies are expected to be mostly sunny to partly cloudy.

Humidity will be on the rise late this week as temperatures soar into the low to mid 90s Thursday through Saturday.

Chance of Showers and Storms

Aside from a stray pop-up shower or storm, the next best chance of showers and storms will arrive Saturday night into Sunday.

What to Expect

The upcoming week will be marked by warm temperatures, with a heat wave expected to hit the city on Wednesday. The heat will continue through the weekend, with temperatures soaring into the low to mid 90s.

While the heat may be uncomfortable, it’s essential to stay safe and hydrated. Make sure to drink plenty of water, wear light and loose clothing, and stay indoors during the hottest part of the day.

Staying Safe During the Heat Wave

It’s crucial to take precautions during the heat wave to avoid heat-related illnesses. Here are some tips to help you stay safe:

Stay hydrated by drinking plenty of water and avoiding sugary drinks. Wear light and loose clothing to help keep you cool. Stay indoors during the hottest part of the day, and avoid engaging in strenuous activities.

Checking the Air Quality

The Air Quality Alert remains in effect until midnight for several counties in the Great Lakes Region. It’s essential to check the air quality index before engaging in outdoor activities, especially if you have respiratory issues.

Conclusion

In conclusion, the Chicago weather is expected to be warm and sunny for the upcoming week, with a heat wave hitting the city on Wednesday. It’s essential to stay safe and hydrated during the heat wave, and to take precautions to avoid heat-related illnesses. Make sure to check the air quality index before engaging in outdoor activities, and stay indoors during the hottest part of the day.

Frequently Asked Questions

Q: What is the current weather condition in Chicago?

A: The current weather condition in Chicago is mostly clear, with lows ranging from the upper 50s to the mid 60s. An Air Quality Alert remains in effect until midnight for several counties in the Great Lakes Region.

Q: What is the forecast for the upcoming week?

A: The forecast for the upcoming week is mostly sunny, with warm temperatures in the low to mid 80s on Monday and Tuesday. The heat returns on Wednesday, with highs in the upper 80s to near 90 degrees.

Q: How can I stay safe during the heat wave?

A: To stay safe during the heat wave, make sure to drink plenty of water, wear light and loose clothing, and stay indoors during the hottest part of the day. Avoid engaging in strenuous activities, and check the air quality index before engaging in outdoor activities.

Q: What is the air quality like in Chicago?

A: The air quality in Chicago is currently poor due to wildfire smoke blanketing the Great Lakes Region. An Air Quality Alert remains in effect until midnight for several counties in the region.

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