Chicago experiences a continental climate with four distinct seasons, sharp temperature swings, and weather that can change rapidly within a single day.

Rain is fairly evenly distributed throughout the year, though summer thunderstorms can be intense and spring showers persistent, making a compact umbrella a year-round essential.

Winter temperatures regularly plunge below freezing from December through February, while summer highs often reach the upper 80s°F (30-32°C) with occasional heat waves pushing past 95°F (35°C).

The famous "Windy City" nickname proves accurate near the lakefront and between buildings downtown, where gusts amplify the winter chill and make windproof outer layers non-negotiable.

Layering is the defining wardrobe strategy here—locals learn to carry extra pieces or leave them in the car, since morning cold can give way to afternoon warmth even in transitional months.