Chicago picked up 49.23 inches of rain in 2018. Measurable rain, 0.01 inch or more in a day, fell on 147 days at Chicago O'Hare International Airport; the wettest day brought 2.36 inches on Aug 7, 2018. The 1991-2020 normal for a full year is 37.86 inches. The total landed 11.37 inches above the normal, which works out to 30% more. 2018 ranks 5th out of 67 complete years, wettest first, in a record that starts in 1958.
Monthly rain totals for 2018. Dark bars show measured amounts, light bars show the 1991-2020 normal for comparison.
Every day with measurable rain in 2018
Every day with measurable rain in 2018: Chicago
Date
Rainfall
0.86″ inches
0.05″ inches
0.08″ inches
0.66″ inches
0.05″ inches
0.10″ inches
0.13″ inches
0.15″ inches
0.01″ inches
0.10″ inches
1.13″ inches
0.05″ inches
0.39″ inches
1.20″ inches
0.18″ inches
0.04″ inches
0.13″ inches
0.09″ inches
0.13″ inches
0.06″ inches
0.37″ inches
0.54″ inches
0.06″ inches
0.17″ inches
0.30″ inches
0.12″ inches
0.03″ inches
0.10″ inches
0.07″ inches
0.35″ inches
0.01″ inches
0.15″ inches
0.52″ inches
0.12″ inches
1.24″ inches
0.04″ inches
0.01″ inches
1.56″ inches
0.06″ inches
0.02″ inches
0.07″ inches
0.25″ inches
0.21″ inches
0.30″ inches
0.53″ inches
0.24″ inches
1.79″ inches
0.02″ inches
0.16″ inches
0.42″ inches
1.39″ inches
0.06″ inches
0.04″ inches
0.13″ inches
0.82″ inches
0.11″ inches
0.50″ inches
0.01″ inches
0.43″ inches
2.36″ inches
0.34″ inches
0.07″ inches
0.03″ inches
0.13″ inches
0.12″ inches
0.15″ inches
0.03″ inches
0.08″ inches
0.26″ inches
0.02″ inches
0.01″ inches
0.24″ inches
0.03″ inches
0.76″ inches
1.23″ inches
1.41″ inches
0.02″ inches
0.36″ inches
0.65″ inches
0.10″ inches
1.34″ inches
1.31″ inches
0.10″ inches
0.01″ inches
0.31″ inches
0.90″ inches
1.96″ inches
0.27″ inches
0.02″ inches
0.10″ inches
1.54″ inches
0.91″ inches
0.33″ inches
0.04″ inches
0.25″ inches
0.57″ inches
1.32″ inches
0.02″ inches
0.01″ inches
0.41″ inches
0.01″ inches
0.74″ inches
0.96″ inches
0.07″ inches
0.03″ inches
0.05″ inches
0.13″ inches
0.01″ inches
0.07″ inches
0.01″ inches
0.20″ inches
0.09″ inches
0.05″ inches
0.01″ inches
0.15″ inches
0.23″ inches
0.22″ inches
0.07″ inches
0.11″ inches
0.81″ inches
0.01″ inches
0.16″ inches
0.06″ inches
0.04″ inches
2.10″ inches
0.52″ inches
0.02″ inches
0.11″ inches
0.39″ inches
0.05″ inches
0.57″ inches
0.15″ inches
0.11″ inches
0.02″ inches
0.22″ inches
0.08″ inches
0.03″ inches
0.01″ inches
0.02″ inches
0.07″ inches
0.81″ inches
0.01″ inches
0.14″ inches
0.08″ inches
0.36″ inches
0.01″ inches
0.03″ inches
Daily totals come from Chicago O'Hare International Airport, which appears in GHCN-Daily with records going back to 1958. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.