Tuesday, September 15, 2026

Forecast: Cool conditions after overnight showers

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Current Weather Conditions and Forecast

The current weather conditions are characterized by increasing cloudiness, with scattered showers developing after midnight. The winds are blowing at a speed of 5-10 mph from the northeast, and the low temperature is expected to be around 59 degrees.

On Wednesday, the weather is expected to be predominantly autumn gray, with a disturbance riding along a frontal boundary across central Illinois, bringing spells of light rain showers at times. There is a possibility that the clouds may break late in the day, just ahead of sunset, allowing for a few peeks of sunshine.

The Next Few Hours

The next few hours are expected to be characterized by increasing cloudiness, with a high chance of scattered showers developing after midnight. The winds are expected to continue blowing at a speed of 5-10 mph from the northeast.


Extended Outlook

Chicago’s Precipitation Chances

Following Wednesday morning showers, the next chance for better-organized precipitation arrives late Friday night into the coming weekend.

Model Forecast Simulation

The model forecast simulation shows multiple weather systems moving across the Central U.S. and Great Lakes.

Forecast Total Rainfall Estimate

Beneficial rainfall is likely across the metro area, with multiple chances for showers and perhaps a few thunderstorms. Any rain is good news for the metro area, as it remains “abnormally dry” or “moderate drought.”

Chicago Forecast Highs and Departure from Normal

Highs are expected to surge well above normal later this week, before settling back down closer to normal by Sunday.

Forecast Average Weekly Temperature Anomaly

Well above normal temperatures are expected to dominate across the central U.S., while unseasonably chilly air grips the western U.S.

Medium Range 10-Day Forecast Height Anomaly

The persistent central U.S. ridging breaks down at times, as a parade of troughs (cooler air) rolls through the Lower 48, with an assist from the North Pacific wave train.

Wednesday Afternoon Forecast Temperatures

No 70s are expected anywhere across the metro area on Wednesday, instead, most areas will see highs in the lower 60s.

Wednesday Wind Gust Forecast

East to northeast winds will dominate off low to mid 60-degree lake waters.

Wednesday Day Planner

Much of the morning will be spent in the mid to upper 50s, with highs only peaking in the lower 60s on Wednesday afternoon.

Wednesday Forecast U.S. Highs

The Lower 48 average is expected to be around 68 degrees, with lingering summer heat beginning to wane. Only about 6.8 million U.S. residents will see temperatures of 90 degrees or warmer.

Current Conditions




7-Day Forecast

Climate and Environment News

Climate and Environment news: WGN Weather Center blog

Conclusion

In conclusion, the current weather conditions are characterized by increasing cloudiness, with scattered showers developing after midnight. The next few hours are expected to be characterized by increasing cloudiness, with a high chance of scattered showers developing after midnight. The extended outlook shows a chance of precipitation on Wednesday, with highs surging well above normal later in the week.

Frequently Asked Questions

Q: What are the current weather conditions?

A: The current weather conditions are characterized by increasing cloudiness, with scattered showers developing after midnight.

Q: What is the forecast for the next few hours?

A: The next few hours are expected to be characterized by increasing cloudiness, with a high chance of scattered showers developing after midnight.

Q: What is the extended outlook?

A: The extended outlook shows a chance of precipitation on Wednesday, with highs surging well above normal later in the week.

Q: What are the forecast temperatures for Wednesday afternoon?

A: No 70s are expected anywhere across the metro area on Wednesday, instead, most areas will see highs in the lower 60s.

Q: What is the forecast for the 7-day period?

A: The 7-day forecast shows a chance of precipitation on Wednesday, with highs surging well above normal later in the week.

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