Chicago wakes up under mostly cloudy skies and mid-40s this morning, but the city is in for a rapid warmup. Temperatures are expected to surge to near 70°F on Wednesday, March 25, 2026, with gusty south winds building through the afternoon. It will feel like a quick hit of spring, warm and relatively dry, although that break will be brief. A powerful cold front arrives Thursday, March 26, with likely thunderstorms and a sharp plunge into the 30s by Thursday night. If you have outdoor plans Thursday afternoon, plan for fast-changing conditions that could disrupt events and commutes as storms fire up and temperatures tumble.
Afternoon Gusts And Tonight's Spotty Storms
South winds pick up this afternoon to around 10 to 15 mph, with frequent gusts near 25 to 30 mph and some higher gusts in exposed spots such as overpasses and bridges. Very dry air mixing down into the metro will knock relative humidity into the 20 to 30 percent range in parts of the region, which means an elevated grass and brush fire risk for some south and southeast neighborhoods. Late Wednesday night into early Thursday, there is a slight chance of isolated showers or thunderstorms, mainly south of I-80, and a few elevated storms could toss down hail around an inch in diameter, according to the National Weather Service Chicago.
Thursday Afternoon Storms Could Turn Severe
On Thursday, March 26, a strong cold front charges across the area. Temperatures in the warm sector ahead of the front should climb into the mid-70s, then drop quickly into the 40s once the line passes. Showers and thunderstorms are most likely after about 1 p.m., with the strongest storms favored near and south of I-80. In that zone, a few storms could produce very large hail and damaging winds. Early development may feature more isolated, hail-heavy storms that later organize into a faster-moving line that favors wind damage, meaning locations along the line could see brief but intense gusts. Anyone living south of the city or planning outdoor activities on Thursday afternoon should keep a close eye on weather alerts.
Timing, Lake, and Travel Impacts
The most impactful travel window looks to be Thursday afternoon into the evening, when heavy downpours, sudden gusts, and rapidly falling temperatures can slick up roads and knock down visibility. Out on the lake, small boats and lakefront users should note that a Gale Watch is in effect for the nearshore waters from this afternoon into Thursday morning, and north-northeast winds could gust close to 40 mph Thursday night. Once the front clears, Friday will feel like a different season, with highs only in the upper 30s, according to the National Weather Service Chicago.
How To Stay Ready
Bring in or tie down patio furniture, delay any planned burns, and secure lightweight items that might take flight in stronger gusts. If you commute Thursday afternoon or evening, build in extra time and be ready for quick-hitting downpours and gusty winds that can affect elevated trains, cyclists, and high-profile vehicles. For official updates, sign up for city alerts via NotifyChicago and check local forecasts before you head out.
