A Nor'easter will bring significant coastal impacts to the Mid-Atlantic and New England through the weekend. Moderate to major coastal flooding, heavy rain, strong winds and high surf expected. Tropical Storm Nolo will continue to strengthen as it moves north toward the Big Island of Hawaii. Heavy rainfall may bring life-threatening, catastrophic flooding and mudslides through the weekend. Read More >
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| March 2018 temperatures were around 1 to 2 degrees below normal across northern Illinois and northwest Indiana. Precipitation for the month was below normal north to above normal south. | March 2018 snowfall was below normal for most areas except for a narrow swath across central Illinois, where heavy snow fell on March 24th. |
| Monthly Maximum Temperature (F) | ||||
| Year | Dec | Jan | Feb | Mar |
| 1879-1880 | 62 | 61 | 63 | 60 |
| 1889-1890 | 64 | 62 | 59 | 56 |
| 1899-1900 | 56 | 56 | 62 | 55 |
| 2017-2018 | 65 | 59 | 66 | 58 |
Public Information Statement National Weather Service Chicago IL 853 AM CDT Sun Apr 1 2018 /953 AM EDT Sun Apr 1 2018/
...A Look Back at the Climate for the Month of March 2018 for Chicago and Rockford... At Chicago, the average high temperature was 44.7 degrees, which is 1.9 degrees below normal. The average low temperature was 29.1 degrees, which is 0.1 degrees below normal. The average temperature for the month was 36.9 degrees which is 1.0 degrees below normal. During the month of March, 1.74 inches of precipitation was recorded, which is 0.76 inches below normal. 2.6 inches of snow was recorded, which is 3.0 inches below normal. There were no records set during the month of March 2018 for Chicago. At Rockford, the average high temperature was 45.8 degrees, which is 1.1 degrees below normal. The average low temperature was 26.1 degrees, which is 1.4 degrees below normal. The average temperature for the month was 36.0 degrees, which is 1.2 degrees below normal. During the month of March, 1.22 inches of precipitation was recorded, which is 1.10 inches below normal. 2.4 inches of snow was recorded, which is 2.4 inches below normal. There were no records set during the month of March 2018 for Rockford.
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