Low 11F. Affton, â¦ Chance of snow 30%. NOAAâs Climate Prediction Center has released weather maps that attempt to forecast weather for the 2020 â 2021 winter. Sunset 5:30 PM. FA weather forecast missed February all together. Sunrise 6:40 AM. Extended weather forecast for Chicago, Illinois. Forecast Discussion. Toggle navigation. East Peoria: See the 60-day extended forecast from The Old Farmerâs Almanac. Mostly cloudy, with a high near 37. Calendar overview of Months Weather Forecast. Here is a look at the winter weather prediction maps by month for the 2020 â 2021 winter. WeatherTAB Chicago, Illinois Help °C °F. SUN. Decatur, IL (62521) Today. Hourly weather forecast in Illinois for the next 15 days: temperature, precipitation, cloud cover, rain, snow, wind, humidity, pressure, fog, sun, thunder, uv index. Although Northern Illinois did have an unusually mild winter until the end of January. Partly cloudy. Weather in Missouri. It has registered temps below zero for one week, this Friday (2/12/21), and according to the forecast we will remain in the single digits, at best, sub zero overnight for at least another â¦ Feb 20 28%. About; Help; US Chicago, Illinois SAT. Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities. 11°F Flurries and a few snow showers throughout the night. High 24F. Jan February 2021 . Free 30 Day Long Range Weather Forecast for Chicago, Illinois. Day Weather Toggle navigation. Extended weather forecast for Champaign, Illinois. Champaign 30 day forecast Champaign weather 30 days weather in Illinois Champaign weather forecast weather today Champaign weather Champaign Champaign forecast Champaign weather hourly Champaign monthly weather weather 30 day Champaign. Mostly cloudy, with a high near 21. The outlook weather maps show both temperature predictions as well as precipitation predictions.. Winds WSW at 5 to 10 mph. Snow likely after noon, mixing with rain after 3pm. 33 to 43 °F. Winds WSW at 10 to 15 mph.. Tonight From Chief Meteorologist Chris Yates. Toggle navigation. ... Live Weather Cams in Central Illinois Click on an image below to view streaming weather for each location. Weather 15 Day. Free Long Range Weather Forecast for Chicago, Illinois. St. Louis Regional Airport Alton 24° 0° Central Illinois Regional Airport Bloomington 18°-2° St. Louis Downtown Airport Cahokia 25°-3° Southern Illinois Airport Carbondale 30° 1° University Of Illinois-Willard Airport Champaign 18°-1° Chicago 26° 7° Chicago Nexrad 25° 4° Dupage County â¦ 16 to 26 °F-2 to 8 °C-12 to -2 °C. A 50 percent chance of snow after 1pm. More places in Illinois . Be prepared with the most accurate 10-day forecast for Bloomington, IL with highs, lows, chance of precipitation from The Weather Channel and Weather.com Enter any city, zip or place. Enter any city, zip or place.