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Cities on the other side of Lake Michigan usually receive more snow than Chicago because of the lake-effect snow that falls on these communities, even though northeasterly winds can sometimes bring lake-effect snow to Chicago area too. Most winters produce many snow falls during the season in light accumulations of around 2 in (5.1 cm). Seasonal snowfall in the city has ranged from 9.8 inches (24.9 cm) (in 1920–21) up to 89.7 in (228 cm) (in 1978–79), and the average annual snowfall in Chicago is 36 inches (91 cm).

The city typically sees less snow in winter than other major cities near the Great Lakes, such as Cleveland or Buffalo, but more snow than that experienced on the East Coast in cities like Washington DC or New York City. Winter in Chicago is generally cold and snowy. Source: NOAA (relative humidity, dew point and sun 1961–1990) Note: Some of the addresses prior to 1909 are different from the post-1909 addresses Classifications Chicago Climate according to major climate systemsĬlimate data for Chicago (Midway Airport), 1991–2020 normals, extremes 1928–presentĬlimate data for Chicago ( O'Hare Int'l Airport), 1991–2020 normals, extremes 1871–present Here is a list of official weather observation locations for the Chicago office: DatesĪll records lost due to Great Chicago Fire Weather data from Midway Airport before July 1, 1942, and after January 16, 1980, and data from O'Hare Airport before January 17, 1980, are not part of the official climate record of Chicago. Both sites have served in the past as the official observation location, the latter being the current official station. Of the two major airports located in Chicago, Midway Airport began observations in 1928, and O'Hare Airport began them in 1958. The National Weather Service office in Chicago has one of the longest periods of official weather records, dating back to 1870, though all the 18 weather records taken at 181 West Washington Street were lost in the Great Chicago Fire. Chicago's weather is influenced during all four seasons by the nearby presence of Lake Michigan. Annual precipitation in Chicago is moderate and relatively evenly distributed, the driest months being January and February and the wettest July and August. All four seasons are distinctly represented: Winters are cold and often see snow with below 0 Celsius temperatures and windchills, while summers are warm and humid with temperatures being hotter inland, spring and fall bring bouts of both cool and warm weather and fairly sunny skies. You can seek refuge from the cold in the city's museums, but if you're hoping to visit Millennium Park or shop along The Magnificent Mile, wear your warmest layers.The climate of Chicago is classified as hot-summer humid continental ( Köppen: Dfa) with hot humid summers and cold, occasionally snowy winters. If you can stand the wintry weather, you'll find some of the lowest rates during this time.

Bank of America Chicago Marathon (October)īiting winds and freezing temperatures (daytime highs rest in the low 30s to high 40s, but wind chills can cause temperatures to drop into the negatives) deter faint-hearted tourists, leaving hotels and flights with plenty of vacancies.

Chicago International Film Festival (October).

Keep in mind that some of the city's outdoor attractions – like Navy Pier and the Lincoln Park Zoo – may have already reduced their hours for the winter season. Daytime highs hover in the 60s and 70s, but evenings can see temperatures drop into the 40s. Cooler weather and fewer people mean you'll enjoy pleasant conditions while exploring the city's top attractions. Navy Blue Angels (August)Īutumn in Chicago offers a sweet spot for tourism.

Do Division Street Fest & Sidewalk Sale (June).

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Along with a full event calendar, the balmy weather offers the ideal setting for exploring by city's waterways via the best Chicago boat tours. Also, expect to encounter some rain in August. But temperatures can fluctuate significantly if there's a passing heat wave with high humidity or strong breezes from Lake Michigan, so pack a mix of clothes. Average summer temperatures range from the high 50s to the mid-80s. While booking in advance is generally a good rule of thumb for Chicago, it especially applies to this time of year – plan on locking down your hotel reservations at least three or four weeks in advance. Summer is the most popular time to visit Chicago, so expect prices to be at their highest and hotel vacancies to be hard to come by. Chicagoland Spring Marathon & Half Marathon (May).Garfield Park Conservatory Spring Flower Show (February-May).However, you should come prepared for rain, and be sure to bring a light jacket for those occasional days that fall into the high 30s and 40s. Average daytime temperatures hover between the high 50s and low 70s – comfortable conditions for walking around. There are advantages to visiting before or after summer, namely more manageable crowds.

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