Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. Are you planning a holiday with hopefully nice weather to Chicago in December 2020? Illinois' climate is typically continental with cold winters, warm summers, and frequent short fluctuations in temperature, humidity, cloudiness, and wind direction. However, to me the outstanding feature of 2015 was the wet weather with the wettest June, second wettest December, and sixth wettest year on record. Temperature In Decatur, the average high-temperature significantly decreases, from a fresh 51.8°F (11°C) in November, to a cold 37.4°F (3°C).In Decatur, the average low-temperature is 21.2°F (-6°C). Select a month to view Illinois sunrise & sunset times for the next twelve months. Average Weather in December in Chicago Illinois, United States. You can jump to a separate table for each region of the state: Chicago Area, Northern Illinois, Central Illinois and Southern Illinois. The drier pattern has resulted in well below normal snowfall for December, and without snow on the ground locking in … Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources. US Dept of Commerce National Oceanic and Atmospheric Administration National Weather Service Central Illinois 1362 State Route 10 Lincoln, IL 62656 How sunny is it in Illinois in December? Note that seasonal normals in contrast with those observed in Chicago in december with a maximum record of 72°F in 2012 and a minimum record of -0°F in 2016. December is in the winter in Chicago and is typically the 3rd coldest month of the year. The average humidity in December is listed below for places in Illinois. NOAA's 1981-2010 Climate Normals. First Choice  FloridaTix  Hoseasons  James Villas  Jet2.com  Jet2holidays  Love Holidays  On the Beach  Rail Europe - formerly Loco2  RHS  Saga Holidays  TUI  Virgin Atlantic  VRBO (formerly HomeAway)  More... We help you find the best travel deals for your holiday in the sun by sharing tips on when and where to go, before providing you with top discounts. Daytime temperatures usually reach 2°C in Chicago, Illinois in December, falling to -7°C at night. Feb The tables give the normal maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. You need to prepare to have about 14 days with temperatures under 32°F, or 45% of the month. Weather history for places in Illinois. The highest temperature reported in Illinois was 117°F in East St. Louis on July 14, 1954. In fact December 2019 has only had five days with below normal temperatures in Chicago. Nov The pattern has also been notably drier than much of the autumn was. Average temperatures for December at cities throughout Illinois are listed below. The average minimum temperature (usually the minimum temperature is noted during the night) in Chicago in December is -7.0°C (19.4°F). Phoenix picks up first measurable rainfall in nearly 4 months. The tables give the normal maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center. Average Weather in December in Springfield Illinois, United States. Sign up for our email newsletter by entering your email address. Disturbances forming along the boundary between the cold polar air and the relatively warm, tropical air sometimes turn into winter storms. Daytime maximum temperatures average around a freezing 2°C (35°F), whilst at night -7°C (20°F) is normal. Dec. Average temperatures for December at cities throughout Illinois are listed below. 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May Get the monthly weather forecast for Illinois City, IL, including daily high/low, historical averages, to help you plan ahead. Jul Average Weather during December in Chicago (Illinois), United States of America. Many consider the more moderate temperatures of spring and fall to be the most pleasant. Each place has a total for the amount of precipitation it usually receives this month. Daytime temperatures usually reach 2°C in Chicago, Illinois in December, falling to -7°C at night. The warm weather Illinois has been experiencing this week is part of a pattern. There are usually 12 days with some rain in Chicago, Illinois in December and the average monthly rainfall is 62mm. The hottest day in December 1992 was 16 December when the temperature reached 54.9°F. The average daily temperature for Chicago in December is a cold 2°C, and this can drop as low to -8°C on average. All the numbers are annual averages, made from years of weather watching. Most sites also have information on the number of days with wet weather. Jun The Farmers Almanac Predicts Winter 2020 In Illinois Will Have Frigid Temps And Above Average Amounts Of Snow. National Climatic Data Center. What's the weather like in Chicago (Illinois) in December 2020? The Illinois sunrise & sunset times shown below are for Chicago. There are normally 3 hours of bright sunshine each day in Chicago, Illinois in December - that's 37% of daylight hours. Jan Based on weather reports collected during 1985–2015. The minimum temperature usually falls between 15 and 27 °F (-10 to -3 °C). Weather in December 2019 in Chicago, Illinois, USA Past Weather in Chicago, Illinois, USA — December 2019 Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 38 °F. December, the first month of the winter, in Decatur, is also a wintry month, with average temperature fluctuating between 21.2°F (-6°C) and 37.4°F (3°C). Aug Select a destination to see more weather parameters. The climate in Chicago during December can be summarized as cold and reasonably dry. The average sea temperature around Chicago, Illinois in December is 5°C. The all-time record high temperature in Chicago during December is 71 F (21.7 C). The high seasonal norm is 40°F. Illinois lies midway between the Continental Divide and the Atlantic Ocean, and the state's southern tip is 500 miles north of the Gulf of Mexico. The minimum is 31°F. Thus, the mean temperature average on this month of december in Illinois is 36°F. This month is known as a chilly month. Get the monthly weather forecast for Chicago, IL, including daily high/low, historical averages, to help you plan ahead. Overall, Illinois started out 2015 on the cold side but finished with the warmest December on record. Brittany Ferries  Cruise Nation  DFDS  English Heritage  Enterprise  Explore! 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