![]() ![]() Overall, the preliminary statewide average January temperature was 21.1 degrees, 5.6 degrees below the 1991–2020 average and the 27 th coldest on record going back to 1895. The variable January temperatures broke 4 daily high maximum temperature records, 3 daily low maximum temperature records, and 2 daily low minimum temperature records. Maps of (left) January average temperature and (right) January average temperature departures from normal. Meanwhile, nighttime low temperatures frequently dipped below zero in central and northern Illinois last month, including lows of -22 degrees in Kane County and -20 degrees in Jo Daviess and Carroll Counties. High temperatures reached into the mid- to high 60s in southern Illinois last month, including 68 degrees in Pope County and 67 degrees in Alexander County. January average temperatures ranged from the low teens in northern Illinois to the low 30s in southern Illinois, between 2 and 8 degrees below normal (Figure 2). Daily January average temperature departures at Chicago Midway. Although last month’s temperatures were not nearly record breaking, it was the coldest January since 2014 in Chicago, Rockford, Moline, Peoria, Springfield, Quincy, and St. Most January days in Chicago were colder than normal, some 15 to 20 degrees below normal in early and late January. ![]() Although temperatures last month were quite variable–typical of January–on average they were 3 to 8 degrees below normal.įigure 1 shows daily temperature departures from normal at Chicago’s Midway Airport. The preliminary statewide average total January precipitation was 1.17 inches, 1.14 inches below the 1991–2020 average and the 25 th driest on record.ĭata are provisional and may change slightly over time Winter Temperatures Returnįollowing the second warmest December on record statewide, a return to winter-like temperatures was quite a shock to the system. ![]() The preliminary statewide average January temperature was 21.1 degrees, 5.6 degrees below the 1991–2020 average and the 27 th coldest on record going back to 1895. ![]()
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