Freeze Warning Kicks Off Chicago Weather Rebound

Temperatures to climb from near-freezing to 80 degrees by week's end.

Apr. 20, 2026 at 9:55am

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A vast, majestic landscape painting depicting Chicago's skyline shrouded in a heavy, atmospheric fog, with the city's landmarks barely visible against the overwhelming scale of the natural environment.As Chicago's weather shifts rapidly, the city's iconic skyline is enveloped in a moody, atmospheric haze, reflecting the unpredictable nature of the spring season.Chicago Today

A freeze warning is in effect early this morning in the Chicago area, with some spots seeing temperatures around 30 degrees. However, a warming trend will quickly push highs into the 70s by Tuesday and potentially reach 80 degrees by Thursday, though showers are expected to return late Thursday into Friday before a dry weekend.

Why it matters

Sudden shifts in Chicago's spring weather can impact everything from agriculture to energy usage and transportation, so this forecast provides important information for residents and businesses to plan accordingly.

The details

Mostly sunny skies today will help drive temperatures into the mid 50s, though it will be cooler near the lake. Tuesday will see a much warmer high in the mid 70s, though cloud cover will increase with a chance of showers and thunderstorms by evening. Wednesday will be partly sunny and continued mild in the low 70s, before Thursday potentially reaching 80 degrees. Showers are expected to arrive Thursday night and continue into Friday, when highs will only reach around 70 degrees. The weekend looks dry with a mix of sun and clouds and highs in the low to mid 60s.

  • Early this morning, temperatures are around 30 degrees in some areas.
  • Today, highs will reach the mid 50s.
  • Tuesday, highs will climb to the mid 70s.
  • Thursday, highs are expected to reach 80 degrees.
  • Late Thursday into Friday, showers are expected to return.

The players

Mike Caplan

A meteorologist and weather forecaster for FOX Chicago.

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What they’re saying

“A freeze warning brings early morning temperatures near or below 30 degrees in some areas.”

— Mike Caplan, Meteorologist

What’s next

The National Weather Service will continue to monitor the situation and issue any necessary updates or advisories as the weather patterns evolve over the next several days.

The takeaway

Chicago's spring weather can be highly variable, with sudden shifts from near-freezing temperatures to 80-degree warmth within a matter of days. This forecast highlights the importance of being prepared for rapid changes in the weather and adjusting plans accordingly.