Time Zone and Climate Type of Chicago, Illinois, USA

Time zone that Chicago City is in is CST (Central Standard Time) UTC/GMT -6 hours.

As for the climate of Chicago, the city lies within the hot-summer humid continental climate, and there are all four seasons experienced here: Spring; Summer; Fall; Winter.

Although Chicago City is at a middle latitude, it is cold in winter, since the North American land mass cools down and polar air outbreaks are frequent. Because of the exposure to different types of air masses and given the distance from the sea, temperature changes are frequent in Chicago.

Annual precipitation amount to 935 millimeters and is well distributed over the seasons. The driest months are January and February ant the wettest are May and June. The presence of Lake Michigan influences Chicago’s weather in all four seasons. 

Winter in Chicago  

Winter in Chicago starts in late November and runs to early March. The winter in Chicago brings 36 inches of annual snowfall. It snows several days a month; sometimes snowstorms can occur. The feeling of cold is active with the north wind blowing in gusts. The temperature in winter can sometimes drop to -30 °C (-22 °F). Sometimes the phenomenon called "ice storm" (or freezing rain) can occur in the winter in Chicago. That is rain falling on a frozen ground resulting in freezing of everything, roads, trees, light poles, cars, etc.

Spring in Chicago

Spring in Chicago is known for its wetness and thunderstorms. Massive snowfalls can occur in the spring as well, especially in late March and early April. It is an unstable season characterized by different situations and temperature changes. It can still be cold at night at the beginning of May, while on other instances the heat can reach or go above 30 °C (86 °F). First thunderstorms usually occur in April and May in the first fine and warm days.

Summer in Chicago  

The summer in Chicago is high in humidity and the temperatures can reach between 78°F and 92°F but can go higher in some cases. During the Dust Bowl years, Midway Airport  recorded a record eight days 100 F-plus days in July 1936 peaking at 107 F on July 11.

Fall – The Quietest Period in Chicago

The quietest period of the year is Fall. In early September the weather is still humid and hot, with sunshine and some afternoon thunderstorms. Slight frosts can occur in October, but mostly it is characterized by mild days. A warm period can occur between late October and early November, with highs above 20 °C (68 °F), it is the so-called Indian Summer. First snowfalls can occur in the month of November.

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