Chicago Midway AP 3SW Weather Records (USC00111577)
Record envelope, standing records and threshold days for Chicago Midway AP 3SW (USC00111577), Illinois, United States, with 99 years of record.
Key Facts for Chicago Midway AP 3SW
- Chicago Midway AP 3SW (USC00111577) is a weather station in Illinois, United States at 41.74 latitude and -87.78 longitude, 189 m (620 ft) above sea level.
- The station reports from 1928 to 2026, 99 years of record.
- 1,464 records set at Chicago Midway AP 3SW still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Chicago Midway AP 3SW set a daily record high minimum temperature of 18.9 C (66.0 F) on 13 October 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Illinois, United States, 41.74 latitude, -87.78 longitude.
- Elevation: 189 m (620 ft).
- Period of record: 1928 to 2026, 99 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
5 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 19.4 C (66.9 F) | -31.7 C (-25.1 F) | 16.1 C (61.0 F) | -22.8 C (-9.0 F) |
| Feb | 23.9 C (75.0 F) | -28.9 C (-20.0 F) | 18.3 C (64.9 F) | -11.7 C (10.9 F) |
| Mar | 30.0 C (86.0 F) | -21.7 C (-7.1 F) | 27.8 C (82.0 F) | -9.4 C (15.1 F) |
| Apr | 33.3 C (91.9 F) | -12.2 C (10.0 F) | 27.8 C (82.0 F) | -1.1 C (30.0 F) |
| May | 38.9 C (102.0 F) | -2.2 C (28.0 F) | 30.6 C (87.1 F) | 0.0 C (32.0 F) |
| Jun | 41.7 C (107.1 F) | 1.7 C (35.1 F) | 34.4 C (93.9 F) | 11.1 C (52.0 F) |
| Jul | 41.1 C (106.0 F) | 7.8 C (46.0 F) | 35.6 C (96.1 F) | 14.4 C (57.9 F) |
| Aug | 38.9 C (102.0 F) | 6.1 C (43.0 F) | 32.8 C (91.0 F) | 14.4 C (57.9 F) |
| Sep | 38.3 C (100.9 F) | -1.7 C (28.9 F) | 35.6 C (96.1 F) | 9.4 C (48.9 F) |
| Oct | 34.4 C (93.9 F) | -6.7 C (19.9 F) | 31.1 C (88.0 F) | 9.4 C (48.9 F) |
| Nov | 27.2 C (81.0 F) | -19.4 C (-2.9 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -28.9 C (-20.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1928 | 18 |
| 1929 | 22 |
| 1930 | 30 |
| 1931 | 12 |
| 1932 | 12 |
| 1933 | 23 |
| 1934 | 22 |
| 1935 | 8 |
| 1936 | 35 |
| 1937 | 11 |
| 1938 | 12 |
| 1939 | 8 |
| 1940 | 18 |
| 1941 | 8 |
| 1942 | 26 |
| 1943 | 23 |
| 1944 | 21 |
| 1945 | 21 |
| 1946 | 12 |
| 1947 | 25 |
| 1948 | 9 |
| 1949 | 13 |
| 1950 | 31 |
| 1951 | 16 |
| 1952 | 17 |
| 1953 | 22 |
| 1954 | 16 |
| 1955 | 22 |
| 1956 | 12 |
| 1957 | 5 |
| 1958 | 12 |
| 1959 | 14 |
| 1960 | 12 |
| 1961 | 11 |
| 1962 | 19 |
| 1963 | 21 |
| 1964 | 15 |
| 1965 | 17 |
| 1966 | 10 |
| 1967 | 23 |
| 1968 | 10 |
| 1969 | 10 |
| 1970 | 12 |
| 1971 | 20 |
| 1972 | 22 |
| 1973 | 11 |
| 1974 | 23 |
| 1975 | 15 |
| 1976 | 17 |
| 1977 | 18 |
| 1978 | 10 |
| 1979 | 23 |
| 1980 | 10 |
| 1981 | 16 |
| 1982 | 23 |
| 1983 | 24 |
| 1984 | 14 |
| 1985 | 11 |
| 1986 | 11 |
| 1987 | 7 |
| 1988 | 25 |
| 1989 | 15 |
| 1990 | 24 |
| 1991 | 23 |
| 1992 | 9 |
| 1993 | 6 |
| 1994 | 9 |
| 1995 | 14 |
| 1996 | 8 |
| 1997 | 7 |
| 1998 | 11 |
| 1999 | 16 |
| 2000 | 14 |
| 2001 | 5 |
| 2002 | 9 |
| 2003 | 4 |
| 2004 | 4 |
| 2005 | 13 |
| 2006 | 12 |
| 2007 | 10 |
| 2008 | 5 |
| 2009 | 8 |
| 2010 | 5 |
| 2011 | 8 |
| 2012 | 31 |
| 2013 | 6 |
| 2014 | 13 |
| 2015 | 12 |
| 2016 | 8 |
| 2017 | 30 |
| 2018 | 8 |
| 2019 | 14 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 25 |
| 2023 | 9 |
| 2024 | 15 |
| 2025 | 11 |
| 2026 | 8 |
All-Time Record Progression
14 new records| Date | Kind | Detail |
|---|---|---|
| 1967-01-27 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
| 1967-01-28 | Record snow depth | Record snow depth 58.4 cm (23.0 in) |
| 1967-01-30 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
| 1967-02-06 | Record snow depth | Record snow depth 68.6 cm (27.0 in) |
| 1972-07-21 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 1977-01-16 | Record low maximum temperature | Record low maximum temperature -21.7 C (-7.1 F) |
| 1979-01-14 | Record snow depth | Record snow depth 73.7 cm (29.0 in) |
| 1982-01-10 | Record low minimum temperature | Record low minimum temperature -30.0 C (-22.0 F) |
| 1983-12-24 | Record low maximum temperature | Record low maximum temperature -23.3 C (-9.9 F) |
| 1985-01-20 | Record low minimum temperature | Record low minimum temperature -31.7 C (-25.1 F) |
| 1988-08-17 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
| 1994-01-18 | Record low maximum temperature | Record low maximum temperature -23.9 C (-11.0 F) |
| 1995-07-14 | Record high minimum temperature | Record high minimum temperature 28.9 C (84.0 F) |
| 1999-01-02 | Record daily snowfall | Record daily snowfall 44.7 cm (17.6 in) |
Wettest Day of Each Month
Jul: 156.5 mm (6.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 70.1 mm (2.8 in) | 12 January 1960 |
| Feb | 82.6 mm (3.3 in) | 21 February 1997 |
| Mar | 63.5 mm (2.5 in) | 31 March 1929 |
| Apr | 97.3 mm (3.8 in) | 18 April 1975 |
| May | 100.3 mm (3.9 in) | 17 May 2020 |
| Jun | 117.9 mm (4.6 in) | 13 June 1976 |
| Jul | 156.5 mm (6.2 in) | 12 July 1957 |
| Aug | 115.1 mm (4.5 in) | 22 August 2014 |
| Sep | 105.7 mm (4.2 in) | 11 September 2000 |
| Oct | 129.8 mm (5.1 in) | 14 October 2017 |
| Nov | 88.6 mm (3.5 in) | 10 November 1995 |
| Dec | 70.6 mm (2.8 in) | 2 December 1982 |
Period of Record Coverage
1928 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1928 | 210 | 57% | No |
| 1929 | 266 | 73% | No |
| 1930 | 270 | 74% | No |
| 1931 | 273 | 75% | No |
| 1932 | 275 | 75% | No |
| 1933 | 264 | 72% | No |
| 1934 | 270 | 74% | No |
| 1935 | 265 | 73% | No |
| 1936 | 270 | 74% | No |
| 1937 | 272 | 75% | No |
| 1938 | 267 | 73% | No |
| 1939 | 271 | 74% | No |
| 1940 | 274 | 75% | No |
| 1941 | 274 | 75% | No |
| 1942 | 363 | 99% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 287 | 78% | No |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 286 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 13 October 2026 | Chicago Midway AP 3SW, US | daily high min (Provisional) | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 51 years | 26 of 100 (Routine) |
| 12 October 2026 | Chicago Midway AP 3SW, US | daily high max (Provisional) | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 96 years | 38 of 100 (Notable) |
| 4 September 2026 | Chicago Midway AP 3SW, US | daily high min (Provisional) | 25.6 C (78.1 F) | 2.3 C (4.1 F) | 65 years | 33 of 100 (Routine) |
| 3 September 2026 | Chicago Midway AP 3SW, US | monthly high min (Tie, Provisional) | 26.1 C (79.0 F) | tie | 15 years | 5 of 100 (Routine) |
| 1 September 2026 | Chicago Midway AP 3SW, US | daily high min (Provisional) | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 72 years | 31 of 100 (Routine) |
| 16 July 2026 | Chicago Midway AP 3SW, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 13 years | 14 of 100 (Routine) |
| 3 July 2026 | Chicago Midway AP 3SW, US | daily rain | 70.6 mm (2.8 in) | 35.5 mm (1.4 in) | 84 years | 55 of 100 (Notable) |
| 1 July 2026 | Chicago Midway AP 3SW, US | daily high min | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 24 years | 17 of 100 (Routine) |
| 29 June 2026 | Chicago Midway AP 3SW, US | daily high min (Tie) | 25.0 C (77.0 F) | tie | 95 years | 9 of 100 (Routine) |
| 13 April 2026 | Chicago Midway AP 3SW, US | daily high min | 17.2 C (63.0 F) | 1.6 C (2.9 F) | 71 years | 33 of 100 (Routine) |
| 9 March 2026 | Chicago Midway AP 3SW, US | daily high max | 22.8 C (73.0 F) | 2.2 C (4.0 F) | 52 years | 27 of 100 (Routine) |
| 6 March 2026 | Chicago Midway AP 3SW, US | daily high max | 23.3 C (73.9 F) | 1.6 C (2.9 F) | 43 years | 23 of 100 (Routine) |
| 6 March 2026 | Chicago Midway AP 3SW, US | daily rain | 13.2 mm (0.5 in) | 0.8 mm (0.03 in) | 43 years | 20 of 100 (Routine) |
| 18 February 2026 | Chicago Midway AP 3SW, US | daily high min (Tie) | 7.2 C (45.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 16 February 2026 | Chicago Midway AP 3SW, US | daily high max | 18.3 C (64.9 F) | 6.1 C (11.0 F) | 4 years | 19 of 100 (Routine) |
| 25 January 2026 | Chicago Midway AP 3SW, US | daily snowfall | 12.7 cm (5.0 in) | 2.5 cm (1.0 in) | 48 years | 28 of 100 (Routine) |
| 9 January 2026 | Chicago Midway AP 3SW, US | daily high max | 15.6 C (60.1 F) | 1.7 C (3.1 F) | 87 years | 37 of 100 (Notable) |
| 9 January 2026 | Chicago Midway AP 3SW, US | daily high min | 5.0 C (41.0 F) | 0.6 C (1.1 F) | 87 years | 35 of 100 (Notable) |
| 8 January 2026 | Chicago Midway AP 3SW, US | daily rain | 59.7 mm (2.4 in) | 22.1 mm (0.9 in) | 18 years | 46 of 100 (Notable) |
| 8 January 2026 | Chicago Midway AP 3SW, US | daily high min (Tie) | 4.4 C (39.9 F) | tie | 91 years | 9 of 100 (Routine) |
Climate Trend
83 complete years, 1942 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1942 | 10.0 C | -0.75 C |
| 1943 | 9.4 C | -1.34 C |
| 1944 | 10.4 C | -0.36 C |
| 1945 | 9.4 C | -1.32 C |
| 1946 | 11.0 C | +0.27 C |
| 1947 | 9.6 C | -1.09 C |
| 1948 | 9.9 C | -0.85 C |
| 1949 | 10.9 C | +0.15 C |
| 1950 | 9.1 C | -1.68 C |
| 1951 | 9.1 C | -1.61 C |
| 1952 | 10.9 C | +0.12 C |
| 1953 | 11.7 C | +0.98 C |
| 1954 | 11.6 C | +0.88 C |
| 1955 | 11.2 C | +0.46 C |
| 1956 | 11.0 C | +0.28 C |
| 1957 | 10.5 C | -0.28 C |
| 1958 | 9.8 C | -0.91 C |
| 1959 | 10.6 C | -0.12 C |
| 1960 | 10.2 C | -0.56 C |
| 1961 | 10.5 C | -0.27 C |
| 1962 | 10.1 C | -0.65 C |
| 1963 | 10.0 C | -0.69 C |
| 1964 | 10.9 C | +0.18 C |
| 1965 | 10.1 C | -0.60 C |
| 1966 | 10.1 C | -0.68 C |
| 1967 | 9.7 C | -1.03 C |
| 1968 | 10.8 C | +0.11 C |
| 1969 | 10.1 C | -0.65 C |
| 1970 | 10.5 C | -0.23 C |
| 1971 | 11.0 C | +0.26 C |
| 1972 | 9.2 C | -1.53 C |
| 1973 | 11.3 C | +0.61 C |
| 1974 | 10.0 C | -0.69 C |
| 1975 | 10.8 C | +0.03 C |
| 1976 | 9.6 C | -1.11 C |
| 1977 | 10.4 C | -0.35 C |
| 1978 | 8.9 C | -1.79 C |
| 1979 | 8.9 C | -1.82 C |
| 1981 | 9.9 C | -0.83 C |
| 1982 | 9.7 C | -1.05 C |
| 1983 | 10.5 C | -0.20 C |
| 1984 | 10.4 C | -0.35 C |
| 1985 | 9.9 C | -0.85 C |
| 1986 | 10.8 C | +0.05 C |
| 1987 | 11.8 C | +1.09 C |
| 1988 | 11.0 C | +0.26 C |
| 1989 | 10.1 C | -0.62 C |
| 1990 | 12.0 C | +1.28 C |
| 1991 | 12.0 C | +1.28 C |
| 1992 | 10.6 C | -0.09 C |
| 1993 | 10.3 C | -0.47 C |
| 1994 | 10.7 C | -0.07 C |
| 1995 | 11.0 C | +0.25 C |
| 1996 | 9.7 C | -0.99 C |
| 1997 | 10.0 C | -0.74 C |
| 1998 | 12.7 C | +2.00 C |
| 1999 | 12.1 C | +1.35 C |
| 2000 | 11.1 C | +0.39 C |
| 2001 | 11.6 C | +0.84 C |
| 2002 | 11.5 C | +0.72 C |
| 2003 | 10.2 C | -0.52 C |
| 2004 | 10.9 C | +0.14 C |
| 2005 | 11.5 C | +0.78 C |
| 2006 | 11.9 C | +1.14 C |
| 2007 | 11.3 C | +0.52 C |
| 2008 | 9.9 C | -0.82 C |
| 2009 | 9.9 C | -0.79 C |
| 2010 | 11.4 C | +0.62 C |
| 2011 | 11.1 C | +0.35 C |
| 2012 | 13.0 C | +2.25 C |
| 2013 | 10.1 C | -0.64 C |
| 2014 | 9.7 C | -1.00 C |
| 2015 | 11.6 C | +0.83 C |
| 2016 | 12.5 C | +1.73 C |
| 2017 | 12.0 C | +1.30 C |
| 2018 | 11.1 C | +0.33 C |
| 2019 | 10.6 C | -0.14 C |
| 2020 | 11.9 C | +1.14 C |
| 2021 | 12.3 C | +1.55 C |
| 2022 | 11.8 C | +1.09 C |
| 2023 | 12.5 C | +1.74 C |
| 2024 | 13.4 C | +2.70 C |
| 2025 | 11.9 C | +1.17 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1942 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 83 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.5) per decade | 1942 to 2025 | 83 | Rise |
| Mean daily maximum | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.4) per decade | 1942 to 2025 | 83 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.7) per decade | 1942 to 2025 | 83 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1928 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.7 C (107.1 F) | 1934 | 36.1 C (97.0 F) | 99 |
| Coldest night (TNn) | -31.7 C (-25.1 F) | 1985 | -22.2 C (-8.0 F) | 99 |
| Wettest day (Rx1day) | 156.5 mm (6.2 in) | 1957 | 66.8 mm (2.6 in) | 99 |
| Wettest five days (Rx5day) | 211.0 mm (8.3 in) | 1996 | 95.0 mm (3.7 in) | 99 |
| Longest dry spell (CDD) | 34 days | 1947 | 19 days | 99 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1928 | 31.7 C (89.1 F) |
| 1929 | 33.3 C (91.9 F) |
| 1930 | 37.2 C (99.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 32.8 C (91.0 F) |
| 1933 | 38.9 C (102.0 F) |
| 1934 | 41.7 C (107.1 F) |
| 1935 | 32.8 C (91.0 F) |
| 1936 | 36.7 C (98.1 F) |
| 1937 | 37.2 C (99.0 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 33.9 C (93.0 F) |
| 1940 | 34.4 C (93.9 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 37.8 C (100.0 F) |
| 1943 | 36.1 C (97.0 F) |
| 1944 | 37.8 C (100.0 F) |
| 1945 | 37.2 C (99.0 F) |
| 1946 | 37.8 C (100.0 F) |
| 1947 | 38.3 C (100.9 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 38.9 C (102.0 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 38.3 C (100.9 F) |
| 1953 | 40.0 C (104.0 F) |
| 1954 | 37.8 C (100.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 39.4 C (102.9 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 37.8 C (100.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 35.6 C (96.1 F) |
| 1963 | 37.2 C (99.0 F) |
| 1964 | 36.7 C (98.1 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 33.9 C (93.0 F) |
| 1968 | 35.6 C (96.1 F) |
| 1969 | 35.6 C (96.1 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 37.2 C (99.0 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 35.0 C (95.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 37.2 C (99.0 F) |
| 1981 | 35.0 C (95.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 36.1 C (97.0 F) |
| 1986 | 36.1 C (97.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 40.0 C (104.0 F) |
| 1989 | 38.3 C (100.9 F) |
| 1990 | 37.8 C (100.0 F) |
| 1991 | 38.9 C (102.0 F) |
| 1992 | 33.9 C (93.0 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 35.6 C (96.1 F) |
| 1995 | 41.1 C (106.0 F) |
| 1996 | 34.4 C (93.9 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 40.0 C (104.0 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 36.1 C (97.0 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 36.1 C (97.0 F) |
| 2004 | 33.3 C (91.9 F) |
| 2005 | 40.0 C (104.0 F) |
| 2006 | 37.2 C (99.0 F) |
| 2007 | 34.4 C (93.9 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 38.3 C (100.9 F) |
| 2012 | 40.6 C (105.1 F) |
| 2013 | 36.1 C (97.0 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 34.4 C (93.9 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 35.6 C (96.1 F) |
| 2019 | 36.1 C (97.0 F) |
| 2020 | 35.6 C (96.1 F) |
| 2021 | 35.6 C (96.1 F) |
| 2022 | 38.3 C (100.9 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 35.6 C (96.1 F) |
| 2026 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1928 | -17.8 C (0.0 F) |
| 1929 | -25.0 C (-13.0 F) |
| 1930 | -28.3 C (-18.9 F) |
| 1931 | -16.7 C (1.9 F) |
| 1932 | -24.4 C (-11.9 F) |
| 1933 | -28.9 C (-20.0 F) |
| 1934 | -22.2 C (-8.0 F) |
| 1935 | -22.8 C (-9.0 F) |
| 1936 | -28.3 C (-18.9 F) |
| 1937 | -18.9 C (-2.0 F) |
| 1938 | -18.9 C (-2.0 F) |
| 1939 | -17.8 C (0.0 F) |
| 1940 | -26.1 C (-15.0 F) |
| 1941 | -21.1 C (-6.0 F) |
| 1942 | -25.6 C (-14.1 F) |
| 1943 | -25.0 C (-13.0 F) |
| 1944 | -21.7 C (-7.1 F) |
| 1945 | -22.2 C (-8.0 F) |
| 1946 | -19.4 C (-2.9 F) |
| 1947 | -18.9 C (-2.0 F) |
| 1948 | -23.3 C (-9.9 F) |
| 1949 | -20.0 C (-4.0 F) |
| 1950 | -23.3 C (-9.9 F) |
| 1951 | -26.1 C (-15.0 F) |
| 1952 | -19.4 C (-2.9 F) |
| 1953 | -17.8 C (0.0 F) |
| 1954 | -21.7 C (-7.1 F) |
| 1955 | -23.3 C (-9.9 F) |
| 1956 | -16.7 C (1.9 F) |
| 1957 | -21.7 C (-7.1 F) |
| 1958 | -22.2 C (-8.0 F) |
| 1959 | -23.3 C (-9.9 F) |
| 1960 | -25.6 C (-14.1 F) |
| 1961 | -19.4 C (-2.9 F) |
| 1962 | -24.4 C (-11.9 F) |
| 1963 | -27.8 C (-18.0 F) |
| 1964 | -16.7 C (1.9 F) |
| 1965 | -22.8 C (-9.0 F) |
| 1966 | -26.7 C (-16.1 F) |
| 1967 | -23.3 C (-9.9 F) |
| 1968 | -23.9 C (-11.0 F) |
| 1969 | -23.3 C (-9.9 F) |
| 1970 | -24.4 C (-11.9 F) |
| 1971 | -22.8 C (-9.0 F) |
| 1972 | -26.1 C (-15.0 F) |
| 1973 | -18.9 C (-2.0 F) |
| 1974 | -22.8 C (-9.0 F) |
| 1975 | -21.1 C (-6.0 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -28.3 C (-18.9 F) |
| 1978 | -22.2 C (-8.0 F) |
| 1979 | -28.3 C (-18.9 F) |
| 1980 | -21.1 C (-6.0 F) |
| 1981 | -23.3 C (-9.9 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -28.9 C (-20.0 F) |
| 1984 | -27.2 C (-17.0 F) |
| 1985 | -31.7 C (-25.1 F) |
| 1986 | -20.0 C (-4.0 F) |
| 1987 | -20.0 C (-4.0 F) |
| 1988 | -24.4 C (-11.9 F) |
| 1989 | -25.0 C (-13.0 F) |
| 1990 | -20.6 C (-5.1 F) |
| 1991 | -18.3 C (-0.9 F) |
| 1992 | -21.7 C (-7.1 F) |
| 1993 | -19.4 C (-2.9 F) |
| 1994 | -28.9 C (-20.0 F) |
| 1995 | -18.9 C (-2.0 F) |
| 1996 | -27.2 C (-17.0 F) |
| 1997 | -22.2 C (-8.0 F) |
| 1998 | -16.7 C (1.9 F) |
| 1999 | -26.1 C (-15.0 F) |
| 2000 | -21.7 C (-7.1 F) |
| 2001 | -17.8 C (0.0 F) |
| 2002 | -20.0 C (-4.0 F) |
| 2003 | -19.4 C (-2.9 F) |
| 2004 | -21.1 C (-6.0 F) |
| 2005 | -17.8 C (0.0 F) |
| 2006 | -21.1 C (-6.0 F) |
| 2007 | -22.8 C (-9.0 F) |
| 2008 | -20.6 C (-5.1 F) |
| 2009 | -27.8 C (-18.0 F) |
| 2010 | -17.8 C (0.0 F) |
| 2011 | -21.1 C (-6.0 F) |
| 2012 | -14.4 C (6.1 F) |
| 2013 | -19.4 C (-2.9 F) |
| 2014 | -26.1 C (-15.0 F) |
| 2015 | -21.7 C (-7.1 F) |
| 2016 | -21.1 C (-6.0 F) |
| 2017 | -19.4 C (-2.9 F) |
| 2018 | -23.3 C (-9.9 F) |
| 2019 | -30.0 C (-22.0 F) |
| 2020 | -18.3 C (-0.9 F) |
| 2021 | -21.1 C (-6.0 F) |
| 2022 | -22.8 C (-9.0 F) |
| 2023 | -17.2 C (1.0 F) |
| 2024 | -22.8 C (-9.0 F) |
| 2025 | -21.1 C (-6.0 F) |
| 2026 | -22.8 C (-9.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1928 | 65.0 mm (2.6 in) |
| 1929 | 71.1 mm (2.8 in) |
| 1930 | 49.5 mm (1.9 in) |
| 1931 | 69.3 mm (2.7 in) |
| 1932 | 65.3 mm (2.6 in) |
| 1933 | 56.9 mm (2.2 in) |
| 1934 | 34.3 mm (1.4 in) |
| 1935 | 48.8 mm (1.9 in) |
| 1936 | 34.8 mm (1.4 in) |
| 1937 | 38.9 mm (1.5 in) |
| 1938 | 45.2 mm (1.8 in) |
| 1939 | 36.8 mm (1.4 in) |
| 1940 | 52.1 mm (2.1 in) |
| 1941 | 43.4 mm (1.7 in) |
| 1942 | 49.8 mm (2.0 in) |
| 1943 | 99.8 mm (3.9 in) |
| 1944 | 41.1 mm (1.6 in) |
| 1945 | 49.5 mm (1.9 in) |
| 1946 | 61.7 mm (2.4 in) |
| 1947 | 65.5 mm (2.6 in) |
| 1948 | 63.5 mm (2.5 in) |
| 1949 | 65.5 mm (2.6 in) |
| 1950 | 63.0 mm (2.5 in) |
| 1951 | 72.1 mm (2.8 in) |
| 1952 | 40.6 mm (1.6 in) |
| 1953 | 61.5 mm (2.4 in) |
| 1954 | 100.3 mm (3.9 in) |
| 1955 | 51.6 mm (2.0 in) |
| 1956 | 39.9 mm (1.6 in) |
| 1957 | 156.5 mm (6.2 in) |
| 1958 | 52.6 mm (2.1 in) |
| 1959 | 116.3 mm (4.6 in) |
| 1960 | 70.1 mm (2.8 in) |
| 1961 | 64.8 mm (2.6 in) |
| 1962 | 46.2 mm (1.8 in) |
| 1963 | 55.6 mm (2.2 in) |
| 1964 | 43.2 mm (1.7 in) |
| 1965 | 66.3 mm (2.6 in) |
| 1966 | 119.6 mm (4.7 in) |
| 1967 | 74.7 mm (2.9 in) |
| 1968 | 96.3 mm (3.8 in) |
| 1969 | 77.2 mm (3.0 in) |
| 1970 | 61.7 mm (2.4 in) |
| 1971 | 55.4 mm (2.2 in) |
| 1972 | 92.7 mm (3.6 in) |
| 1973 | 41.9 mm (1.6 in) |
| 1974 | 51.6 mm (2.0 in) |
| 1975 | 97.3 mm (3.8 in) |
| 1976 | 117.9 mm (4.6 in) |
| 1977 | 74.2 mm (2.9 in) |
| 1978 | 77.0 mm (3.0 in) |
| 1979 | 66.0 mm (2.6 in) |
| 1980 | 74.7 mm (2.9 in) |
| 1981 | 70.4 mm (2.8 in) |
| 1982 | 70.6 mm (2.8 in) |
| 1983 | 73.2 mm (2.9 in) |
| 1984 | 54.1 mm (2.1 in) |
| 1985 | 80.8 mm (3.2 in) |
| 1986 | 69.1 mm (2.7 in) |
| 1987 | 99.1 mm (3.9 in) |
| 1988 | 42.7 mm (1.7 in) |
| 1989 | 52.8 mm (2.1 in) |
| 1990 | 93.7 mm (3.7 in) |
| 1991 | 67.3 mm (2.6 in) |
| 1992 | 82.6 mm (3.3 in) |
| 1993 | 79.0 mm (3.1 in) |
| 1994 | 66.8 mm (2.6 in) |
| 1995 | 88.6 mm (3.5 in) |
| 1996 | 145.3 mm (5.7 in) |
| 1997 | 82.6 mm (3.3 in) |
| 1998 | 89.2 mm (3.5 in) |
| 1999 | 47.8 mm (1.9 in) |
| 2000 | 105.7 mm (4.2 in) |
| 2001 | 90.9 mm (3.6 in) |
| 2002 | 66.3 mm (2.6 in) |
| 2003 | 56.6 mm (2.2 in) |
| 2004 | 40.6 mm (1.6 in) |
| 2005 | 24.4 mm (1.0 in) |
| 2006 | 96.5 mm (3.8 in) |
| 2007 | 63.2 mm (2.5 in) |
| 2008 | 91.9 mm (3.6 in) |
| 2009 | 51.3 mm (2.0 in) |
| 2010 | 121.2 mm (4.8 in) |
| 2011 | 65.5 mm (2.6 in) |
| 2012 | 78.2 mm (3.1 in) |
| 2013 | 69.3 mm (2.7 in) |
| 2014 | 115.1 mm (4.5 in) |
| 2015 | 98.3 mm (3.9 in) |
| 2016 | 50.8 mm (2.0 in) |
| 2017 | 129.8 mm (5.1 in) |
| 2018 | 68.6 mm (2.7 in) |
| 2019 | 87.6 mm (3.4 in) |
| 2020 | 100.3 mm (3.9 in) |
| 2021 | 68.3 mm (2.7 in) |
| 2022 | 47.0 mm (1.9 in) |
| 2023 | 101.9 mm (4.0 in) |
| 2024 | 47.2 mm (1.9 in) |
| 2025 | 80.0 mm (3.1 in) |
| 2026 | 84.1 mm (3.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1928 | 104.6 mm (4.1 in) |
| 1929 | 90.7 mm (3.6 in) |
| 1930 | 69.9 mm (2.8 in) |
| 1931 | 80.5 mm (3.2 in) |
| 1932 | 77.5 mm (3.1 in) |
| 1933 | 64.6 mm (2.5 in) |
| 1934 | 84.8 mm (3.3 in) |
| 1935 | 83.8 mm (3.3 in) |
| 1936 | 58.9 mm (2.3 in) |
| 1937 | 56.4 mm (2.2 in) |
| 1938 | 62.6 mm (2.5 in) |
| 1939 | 72.7 mm (2.9 in) |
| 1940 | 69.8 mm (2.7 in) |
| 1941 | 81.6 mm (3.2 in) |
| 1942 | 58.2 mm (2.3 in) |
| 1943 | 108.2 mm (4.3 in) |
| 1944 | 63.5 mm (2.5 in) |
| 1945 | 70.6 mm (2.8 in) |
| 1946 | 66.4 mm (2.6 in) |
| 1947 | 117.1 mm (4.6 in) |
| 1948 | 73.3 mm (2.9 in) |
| 1949 | 81.8 mm (3.2 in) |
| 1950 | 101.4 mm (4.0 in) |
| 1951 | 86.6 mm (3.4 in) |
| 1952 | 51.8 mm (2.0 in) |
| 1953 | 78.5 mm (3.1 in) |
| 1954 | 172.1 mm (6.8 in) |
| 1955 | 96.6 mm (3.8 in) |
| 1956 | 85.4 mm (3.4 in) |
| 1957 | 162.3 mm (6.4 in) |
| 1958 | 66.1 mm (2.6 in) |
| 1959 | 123.2 mm (4.9 in) |
| 1960 | 84.3 mm (3.3 in) |
| 1961 | 134.1 mm (5.3 in) |
| 1962 | 55.6 mm (2.2 in) |
| 1963 | 105.4 mm (4.1 in) |
| 1964 | 56.4 mm (2.2 in) |
| 1965 | 75.4 mm (3.0 in) |
| 1966 | 136.9 mm (5.4 in) |
| 1967 | 115.1 mm (4.5 in) |
| 1968 | 111.8 mm (4.4 in) |
| 1969 | 111.5 mm (4.4 in) |
| 1970 | 84.9 mm (3.3 in) |
| 1971 | 74.5 mm (2.9 in) |
| 1972 | 95.0 mm (3.7 in) |
| 1973 | 63.3 mm (2.5 in) |
| 1974 | 77.5 mm (3.1 in) |
| 1975 | 99.8 mm (3.9 in) |
| 1976 | 117.9 mm (4.6 in) |
| 1977 | 142.0 mm (5.6 in) |
| 1978 | 111.3 mm (4.4 in) |
| 1979 | 90.4 mm (3.6 in) |
| 1980 | 110.7 mm (4.4 in) |
| 1981 | 96.0 mm (3.8 in) |
| 1982 | 101.1 mm (4.0 in) |
| 1983 | 113.0 mm (4.4 in) |
| 1984 | 79.2 mm (3.1 in) |
| 1985 | 82.8 mm (3.3 in) |
| 1986 | 92.7 mm (3.6 in) |
| 1987 | 115.6 mm (4.6 in) |
| 1988 | 62.8 mm (2.5 in) |
| 1989 | 72.4 mm (2.9 in) |
| 1990 | 118.7 mm (4.7 in) |
| 1991 | 95.0 mm (3.7 in) |
| 1992 | 95.8 mm (3.8 in) |
| 1993 | 155.2 mm (6.1 in) |
| 1994 | 88.6 mm (3.5 in) |
| 1995 | 108.4 mm (4.3 in) |
| 1996 | 211.0 mm (8.3 in) |
| 1997 | 116.9 mm (4.6 in) |
| 1998 | 112.7 mm (4.4 in) |
| 1999 | 75.7 mm (3.0 in) |
| 2000 | 128.8 mm (5.1 in) |
| 2001 | 90.9 mm (3.6 in) |
| 2002 | 103.3 mm (4.1 in) |
| 2003 | 88.4 mm (3.5 in) |
| 2004 | 80.2 mm (3.2 in) |
| 2005 | 57.1 mm (2.2 in) |
| 2006 | 100.9 mm (4.0 in) |
| 2007 | 147.8 mm (5.8 in) |
| 2008 | 167.1 mm (6.6 in) |
| 2009 | 114.5 mm (4.5 in) |
| 2010 | 179.4 mm (7.1 in) |
| 2011 | 96.7 mm (3.8 in) |
| 2012 | 78.2 mm (3.1 in) |
| 2013 | 125.8 mm (5.0 in) |
| 2014 | 184.2 mm (7.3 in) |
| 2015 | 103.9 mm (4.1 in) |
| 2016 | 80.9 mm (3.2 in) |
| 2017 | 173.0 mm (6.8 in) |
| 2018 | 95.1 mm (3.7 in) |
| 2019 | 121.8 mm (4.8 in) |
| 2020 | 179.6 mm (7.1 in) |
| 2021 | 108.8 mm (4.3 in) |
| 2022 | 71.6 mm (2.8 in) |
| 2023 | 151.7 mm (6.0 in) |
| 2024 | 84.9 mm (3.3 in) |
| 2025 | 101.3 mm (4.0 in) |
| 2026 | 90.2 mm (3.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1928 | 14 days |
| 1929 | 18 days |
| 1930 | 26 days |
| 1931 | 18 days |
| 1932 | 19 days |
| 1933 | 26 days |
| 1934 | 21 days |
| 1935 | 16 days |
| 1936 | 18 days |
| 1937 | 15 days |
| 1938 | 18 days |
| 1939 | 29 days |
| 1940 | 16 days |
| 1941 | 19 days |
| 1942 | 28 days |
| 1943 | 27 days |
| 1944 | 28 days |
| 1945 | 13 days |
| 1946 | 30 days |
| 1947 | 34 days |
| 1948 | 20 days |
| 1949 | 21 days |
| 1950 | 17 days |
| 1951 | 16 days |
| 1952 | 27 days |
| 1953 | 22 days |
| 1954 | 18 days |
| 1955 | 16 days |
| 1956 | 19 days |
| 1957 | 29 days |
| 1958 | 19 days |
| 1959 | 25 days |
| 1960 | 21 days |
| 1961 | 16 days |
| 1962 | 26 days |
| 1963 | 23 days |
| 1964 | 24 days |
| 1965 | 20 days |
| 1966 | 23 days |
| 1967 | 21 days |
| 1968 | 19 days |
| 1969 | 25 days |
| 1970 | 15 days |
| 1971 | 23 days |
| 1972 | 14 days |
| 1973 | 14 days |
| 1974 | 15 days |
| 1975 | 15 days |
| 1976 | 26 days |
| 1977 | 19 days |
| 1978 | 16 days |
| 1979 | 32 days |
| 1980 | 13 days |
| 1981 | 17 days |
| 1982 | 18 days |
| 1983 | 17 days |
| 1984 | 21 days |
| 1985 | 14 days |
| 1986 | 23 days |
| 1987 | 29 days |
| 1988 | 26 days |
| 1989 | 21 days |
| 1990 | 16 days |
| 1991 | 23 days |
| 1992 | 26 days |
| 1993 | 21 days |
| 1994 | 22 days |
| 1995 | 22 days |
| 1996 | 22 days |
| 1997 | 14 days |
| 1998 | 14 days |
| 1999 | 25 days |
| 2000 | 17 days |
| 2001 | 14 days |
| 2002 | 17 days |
| 2003 | 22 days |
| 2004 | 19 days |
| 2005 | 24 days |
| 2006 | 16 days |
| 2007 | 15 days |
| 2008 | 14 days |
| 2009 | 22 days |
| 2010 | 17 days |
| 2011 | 12 days |
| 2012 | 16 days |
| 2013 | 18 days |
| 2014 | 13 days |
| 2015 | 20 days |
| 2016 | 15 days |
| 2017 | 19 days |
| 2018 | 16 days |
| 2019 | 26 days |
| 2020 | 16 days |
| 2021 | 14 days |
| 2022 | 20 days |
| 2023 | 29 days |
| 2024 | 24 days |
| 2025 | 17 days |
| 2026 | 22 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
83 years with a frostAcross 83 years with a frost, the median last spring frost at Chicago Midway AP 3SW falls on 16 April and the median first autumn frost on 28 October, which leaves a median of 191 days between them.
In 1996 to 2025 the median growing season was 205 days. That is 16 days more than in 1942 to 1971.
Fitted over all years, the growing season changes by +3.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1942 to 1971) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 16 April | 21 April | 10 April | 11 days earlier | -2.0 days per decade |
| First autumn frost | 28 October | 28 October | 1 November | 4 days later | +1.2 days per decade |
| Growing days | 191 days | 189 days | 205 days | 16 days more | +3.2 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
83 years, 1942 to 2025A day with at least 70.4 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 154.1 mm (6.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 70.4 mm (2.8 in) | |
| 5 years | 93.5 mm (3.7 in) | |
| 10 years | 108.5 mm (4.3 in) | |
| 25 years | 127.2 mm (5.0 in) | |
| 50 years | 140.8 mm (5.5 in) | |
| 100 years | 154.1 mm (6.1 in) | Longer than the 83 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 83 years of values from 1942 to 2025.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 156.5 mm (6.2 in) in 1957; 145.3 mm (5.7 in) in 1996; 129.8 mm (5.1 in) in 2017.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Chicago Midway AP 3SW had a mean temperature of 11.7 C (53.0 F) and 1,078.2 mm (42.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Dayton Mcd (United States, 372 km away), Edwardsport Pwr Plt (United States, 330 km away) and Greencastle 1 W (United States, 245 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Dayton Mcd | United States | 372 km (231 mi) | 11.9 C (53.3 F) | 987.9 mm (38.9 in) | 0.77 |
| Edwardsport Pwr Plt | United States | 330 km (205 mi) | 11.8 C (53.2 F) | 1,015.8 mm (40.0 in) | 0.85 |
| Greencastle 1 W | United States | 245 km (152 mi) | 11.3 C (52.4 F) | 1,111.0 mm (43.7 in) | 0.85 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-16).