Waukegan Weather Records (USC00119029)
Record envelope, standing records and threshold days for Waukegan (USC00119029), Illinois, United States, with 80 years of record.
Key Facts for Waukegan
- Waukegan (USC00119029) is a weather station in Illinois, United States at 42.35 latitude and -87.88 longitude, 213 m (700 ft) above sea level.
- The station reports from 1923 to 2002, 80 years of record.
- 1,464 records set at Waukegan still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Waukegan tied a daily record high minimum temperature of 22.8 C (73.0 F) on 22 July 2002.
About the Station
- Location: Illinois, United States, 42.35 latitude, -87.88 longitude.
- Elevation: 213 m (700 ft).
- Period of record: 1923 to 2002, 80 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.8 C (64.0 F) | -32.8 C (-27.0 F) | n/a | n/a |
| Feb | 21.7 C (71.1 F) | -30.0 C (-22.0 F) | n/a | n/a |
| Mar | 27.2 C (81.0 F) | -24.4 C (-11.9 F) | n/a | n/a |
| Apr | 32.2 C (90.0 F) | -13.3 C (8.1 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 39.4 C (102.9 F) | 1.1 C (34.0 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | 7.2 C (45.0 F) | n/a | n/a |
| Aug | 38.9 C (102.0 F) | 4.4 C (39.9 F) | n/a | n/a |
| Sep | 37.8 C (100.0 F) | -1.7 C (28.9 F) | n/a | n/a |
| Oct | 32.2 C (90.0 F) | -7.8 C (18.0 F) | n/a | n/a |
| Nov | 26.1 C (79.0 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -30.6 C (-23.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1949 | 34 |
| 1950 | 49 |
| 1951 | 28 |
| 1952 | 23 |
| 1953 | 45 |
| 1954 | 17 |
| 1955 | 32 |
| 1956 | 22 |
| 1957 | 20 |
| 1958 | 19 |
| 1959 | 38 |
| 1960 | 23 |
| 1961 | 16 |
| 1962 | 31 |
| 1963 | 47 |
| 1964 | 36 |
| 1965 | 36 |
| 1966 | 31 |
| 1967 | 26 |
| 1968 | 37 |
| 1969 | 19 |
| 1970 | 25 |
| 1971 | 15 |
| 1972 | 32 |
| 1973 | 27 |
| 1974 | 23 |
| 1975 | 19 |
| 1976 | 30 |
| 1977 | 30 |
| 1978 | 9 |
| 1979 | 41 |
| 1980 | 18 |
| 1981 | 21 |
| 1982 | 38 |
| 1983 | 25 |
| 1984 | 15 |
| 1985 | 18 |
| 1986 | 28 |
| 1987 | 30 |
| 1988 | 39 |
| 1989 | 26 |
| 1990 | 27 |
| 1991 | 44 |
| 1992 | 26 |
| 1993 | 21 |
| 1994 | 31 |
| 1995 | 24 |
| 1996 | 18 |
| 1997 | 16 |
| 1998 | 20 |
| 1999 | 30 |
| 2000 | 27 |
| 2001 | 23 |
| 2002 | 19 |
All-Time Record Progression
11 new records| Date | Kind | Detail |
|---|---|---|
| 1964-07-18 | Record daily precipitation | Record daily precipitation 78.2 mm (3.1 in) |
| 1972-06-20 | Record daily precipitation | Record daily precipitation 101.6 mm (4.0 in) |
| 1979-01-14 | Record daily snowfall | Record daily snowfall 38.1 cm (15.0 in) |
| 1979-01-14 | Record snow depth | Record snow depth 81.3 cm (32.0 in) |
| 1982-01-11 | Record low minimum temperature | Record low minimum temperature -31.1 C (-24.0 F) |
| 1985-01-19 | Record low minimum temperature | Record low minimum temperature -32.8 C (-27.0 F) |
| 1988-06-25 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 1988-08-02 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 1989-12-21 | Record low maximum temperature | Record low maximum temperature -22.8 C (-9.0 F) |
| 1994-01-19 | Record low maximum temperature | Record low maximum temperature -25.0 C (-13.0 F) |
| 1999-01-03 | Record daily snowfall | Record daily snowfall 45.7 cm (18.0 in) |
Wettest Day of Each Month
Jun: 101.6 mm (4.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 60.2 mm (2.4 in) | 24 January 1938 |
| Feb | 63.5 mm (2.5 in) | 21 February 1997 |
| Mar | 76.2 mm (3.0 in) | 9 March 1998 |
| Apr | 63.5 mm (2.5 in) | 2 April 1983 |
| May | 50.0 mm (2.0 in) | 19 May 1996 |
| Jun | 101.6 mm (4.0 in) | 20 June 1972 |
| Jul | 86.4 mm (3.4 in) | 22 July 1982 |
| Aug | 94.0 mm (3.7 in) | 7 August 1984 |
| Sep | 78.7 mm (3.1 in) | 26 September 1986 |
| Oct | 76.5 mm (3.0 in) | 14 October 2001 |
| Nov | 76.2 mm (3.0 in) | 28 November 1995 |
| Dec | 62.0 mm (2.4 in) | 3 December 1982 |
Period of Record Coverage
1949 to 2002| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 361 | 99% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 349 | 96% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 345 | 94% | Yes |
| 1977 | 343 | 94% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 359 | 98% | Yes |
| 1983 | 359 | 98% | Yes |
| 1984 | 356 | 97% | Yes |
| 1985 | 326 | 89% | No |
| 1986 | 277 | 76% | No |
| 1987 | 358 | 98% | Yes |
| 1988 | 346 | 95% | Yes |
| 1989 | 324 | 89% | No |
| 1990 | 359 | 98% | Yes |
| 1991 | 356 | 98% | Yes |
| 1992 | 358 | 98% | Yes |
| 1993 | 336 | 92% | Yes |
| 1994 | 347 | 95% | Yes |
| 1995 | 338 | 93% | Yes |
| 1996 | 343 | 94% | Yes |
| 1997 | 339 | 93% | Yes |
| 1998 | 345 | 95% | Yes |
| 1999 | 354 | 97% | Yes |
| 2000 | 357 | 98% | Yes |
| 2001 | 327 | 90% | No |
| 2002 | 182 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 July 2002 | Waukegan, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 49 years | 4 of 100 (Routine) |
| 22 July 2002 | Waukegan, US | daily high max (Tie) | 36.7 C (98.1 F) | tie | 19 years | 2 of 100 (Routine) |
| 3 July 2002 | Waukegan, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 36 years | 3 of 100 (Routine) |
| 22 May 2002 | Waukegan, US | daily low min | 0.0 C (32.0 F) | 2.2 C (4.0 F) | 4 years | 10 of 100 (Routine) |
| 21 May 2002 | Waukegan, US | daily low min | -1.7 C (28.9 F) | 3.4 C (6.1 F) | 48 years | 26 of 100 (Routine) |
| 20 May 2002 | Waukegan, US | daily low min (Tie) | 2.8 C (37.0 F) | tie | 48 years | 4 of 100 (Routine) |
| 18 May 2002 | Waukegan, US | daily low min | 0.0 C (32.0 F) | 0.6 C (1.1 F) | 47 years | 20 of 100 (Routine) |
| 18 May 2002 | Waukegan, US | daily low max | 6.1 C (43.0 F) | 0.6 C (1.1 F) | 32 years | 14 of 100 (Routine) |
| 12 May 2002 | Waukegan, US | daily rain | 32.5 mm (1.3 in) | 2.8 mm (0.11 in) | 36 years | 21 of 100 (Routine) |
| 19 April 2002 | Waukegan, US | daily high max | 31.1 C (88.0 F) | 1.7 C (3.1 F) | 16 years | 12 of 100 (Routine) |
| 18 April 2002 | Waukegan, US | daily high max (Tie) | 28.9 C (84.0 F) | tie | 25 years | 3 of 100 (Routine) |
| 17 April 2002 | Waukegan, US | daily high max | 30.0 C (86.0 F) | 1.7 C (3.1 F) | 44 years | 20 of 100 (Routine) |
| 17 April 2002 | Waukegan, US | monthly high min (Tie) | 19.4 C (66.9 F) | tie | 11 years | 4 of 100 (Routine) |
| 16 April 2002 | Waukegan, US | daily high min | 15.6 C (60.1 F) | 4.5 C (8.1 F) | 44 years | 27 of 100 (Routine) |
| 16 April 2002 | Waukegan, US | daily high max | 31.1 C (88.0 F) | 2.8 C (5.0 F) | 37 years | 20 of 100 (Routine) |
| 22 March 2002 | Waukegan, US | daily low max | -6.7 C (19.9 F) | 4.5 C (8.1 F) | 19 years | 17 of 100 (Routine) |
| 5 March 2002 | Waukegan, US | daily low max | -8.9 C (16.0 F) | 1.7 C (3.1 F) | 24 years | 14 of 100 (Routine) |
| 5 March 2002 | Waukegan, US | daily low min | -19.4 C (-2.9 F) | 1.1 C (2.0 F) | 24 years | 14 of 100 (Routine) |
| 4 March 2002 | Waukegan, US | daily low min | -21.1 C (-6.0 F) | 4.4 C (7.9 F) | 24 years | 20 of 100 (Routine) |
| 25 February 2002 | Waukegan, US | daily high max | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 26 years | 13 of 100 (Routine) |
Climate Trend
41 complete years, 1949 to 2000| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1949 | 9.5 C | +0.72 C |
| 1950 | 7.9 C | -0.93 C |
| 1951 | 7.8 C | -1.03 C |
| 1952 | 9.6 C | +0.80 C |
| 1953 | 10.3 C | +1.50 C |
| 1954 | 9.9 C | +1.06 C |
| 1955 | 9.5 C | +0.75 C |
| 1956 | 9.4 C | +0.64 C |
| 1957 | 9.0 C | +0.23 C |
| 1958 | 8.5 C | -0.33 C |
| 1959 | 9.0 C | +0.25 C |
| 1960 | 8.8 C | +0.02 C |
| 1961 | 9.4 C | +0.64 C |
| 1962 | 8.7 C | -0.14 C |
| 1963 | 8.6 C | -0.20 C |
| 1964 | 9.9 C | +1.07 C |
| 1965 | 9.0 C | +0.20 C |
| 1966 | 8.8 C | +0.00 C |
| 1967 | 8.4 C | -0.37 C |
| 1968 | 9.6 C | +0.76 C |
| 1970 | 8.3 C | -0.48 C |
| 1971 | 8.4 C | -0.40 C |
| 1972 | 7.2 C | -1.62 C |
| 1973 | 9.6 C | +0.77 C |
| 1974 | 8.3 C | -0.49 C |
| 1975 | 8.8 C | +0.01 C |
| 1978 | 7.2 C | -1.57 C |
| 1979 | 6.9 C | -1.90 C |
| 1980 | 7.5 C | -1.28 C |
| 1981 | 7.9 C | -0.86 C |
| 1982 | 7.6 C | -1.24 C |
| 1987 | 9.7 C | +0.86 C |
| 1990 | 9.5 C | +0.69 C |
| 1991 | 9.5 C | +0.70 C |
| 1992 | 8.0 C | -0.80 C |
| 1994 | 8.5 C | -0.33 C |
| 1995 | 8.6 C | -0.24 C |
| 1996 | 7.4 C | -1.39 C |
| 1998 | 11.0 C | +2.17 C |
| 1999 | 9.9 C | +1.11 C |
| 2000 | 9.3 C | +0.55 C |
The fitted trend in annual mean temperature here over 1949 to 2000 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.3) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.1 C (-0.2 to 0.1) per decade | -0.1 F (-0.4 to 0.3) per decade | 1949 to 2000 | 41 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.3 to 0.1) per decade | -0.2 F (-0.5 to 0.2) per decade | 1949 to 2000 | 41 | Not clearly different from zero |
| Mean daily minimum | -0.01 C (-0.23 to 0.20) per decade | -0.03 F (-0.41 to 0.35) per decade | 1949 to 2000 | 41 | Not clearly different from zero |
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
1923 to 2002| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1988 | 35.0 C (95.0 F) | 54 |
| Coldest night (TNn) | -32.8 C (-27.0 F) | 1985 | -24.1 C (-11.5 F) | 54 |
| Wettest day (Rx1day) | 101.6 mm (4.0 in) | 1972 | 56.0 mm (2.2 in) | 80 |
| Wettest five days (Rx5day) | 248.8 mm (9.8 in) | 1986 | 81.0 mm (3.2 in) | 80 |
| Longest dry spell (CDD) | 55 days | 1952 | 20 days | 80 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | 36.1 C (97.0 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 35.0 C (95.0 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 35.0 C (95.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 34.4 C (93.9 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 34.4 C (93.9 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 36.1 C (97.0 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 35.0 C (95.0 F) |
| 1973 | 35.6 C (96.1 F) |
| 1974 | 36.1 C (97.0 F) |
| 1975 | 33.3 C (91.9 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 33.3 C (91.9 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 37.8 C (100.0 F) |
| 1984 | 33.9 C (93.0 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 33.9 C (93.0 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 36.1 C (97.0 F) |
| 1990 | 36.1 C (97.0 F) |
| 1991 | 37.8 C (100.0 F) |
| 1992 | 31.1 C (88.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 35.6 C (96.1 F) |
| 1995 | 38.9 C (102.0 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 34.4 C (93.9 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 38.3 C (100.9 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1923 | n/a |
| 1924 | n/a |
| 1925 | n/a |
| 1926 | n/a |
| 1927 | n/a |
| 1928 | n/a |
| 1929 | n/a |
| 1930 | n/a |
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | n/a |
| 1939 | n/a |
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | n/a |
| 1948 | n/a |
| 1949 | -21.7 C (-7.1 F) |
| 1950 | -24.4 C (-11.9 F) |
| 1951 | -30.6 C (-23.1 F) |
| 1952 | -22.2 C (-8.0 F) |
| 1953 | -20.0 C (-4.0 F) |
| 1954 | -25.0 C (-13.0 F) |
| 1955 | -25.0 C (-13.0 F) |
| 1956 | -20.0 C (-4.0 F) |
| 1957 | -23.3 C (-9.9 F) |
| 1958 | -25.0 C (-13.0 F) |
| 1959 | -25.0 C (-13.0 F) |
| 1960 | -25.0 C (-13.0 F) |
| 1961 | -22.2 C (-8.0 F) |
| 1962 | -26.1 C (-15.0 F) |
| 1963 | -29.4 C (-20.9 F) |
| 1964 | -18.3 C (-0.9 F) |
| 1965 | -26.1 C (-15.0 F) |
| 1966 | -29.4 C (-20.9 F) |
| 1967 | -26.1 C (-15.0 F) |
| 1968 | -26.7 C (-16.1 F) |
| 1969 | -23.9 C (-11.0 F) |
| 1970 | -25.6 C (-14.1 F) |
| 1971 | -24.4 C (-11.9 F) |
| 1972 | -27.8 C (-18.0 F) |
| 1973 | -19.4 C (-2.9 F) |
| 1974 | -23.3 C (-9.9 F) |
| 1975 | -22.2 C (-8.0 F) |
| 1976 | -23.9 C (-11.0 F) |
| 1977 | -27.2 C (-17.0 F) |
| 1978 | -23.3 C (-9.9 F) |
| 1979 | -28.3 C (-18.9 F) |
| 1980 | -21.7 C (-7.1 F) |
| 1981 | -23.3 C (-9.9 F) |
| 1982 | -31.1 C (-24.0 F) |
| 1983 | -30.6 C (-23.1 F) |
| 1984 | -28.3 C (-18.9 F) |
| 1985 | -32.8 C (-27.0 F) |
| 1986 | -22.8 C (-9.0 F) |
| 1987 | -21.7 C (-7.1 F) |
| 1988 | -26.7 C (-16.1 F) |
| 1989 | -26.7 C (-16.1 F) |
| 1990 | -21.7 C (-7.1 F) |
| 1991 | -20.6 C (-5.1 F) |
| 1992 | -22.2 C (-8.0 F) |
| 1993 | -21.1 C (-6.0 F) |
| 1994 | -30.6 C (-23.1 F) |
| 1995 | -20.0 C (-4.0 F) |
| 1996 | -30.0 C (-22.0 F) |
| 1997 | -23.3 C (-9.9 F) |
| 1998 | -19.4 C (-2.9 F) |
| 1999 | -27.2 C (-17.0 F) |
| 2000 | -21.1 C (-6.0 F) |
| 2001 | -18.3 C (-0.9 F) |
| 2002 | -21.1 C (-6.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1923 | 67.3 mm (2.6 in) |
| 1924 | 75.4 mm (3.0 in) |
| 1925 | 70.6 mm (2.8 in) |
| 1926 | 57.4 mm (2.3 in) |
| 1927 | 59.7 mm (2.4 in) |
| 1928 | 59.9 mm (2.4 in) |
| 1929 | 52.1 mm (2.1 in) |
| 1930 | 52.1 mm (2.1 in) |
| 1931 | 36.1 mm (1.4 in) |
| 1932 | 49.8 mm (2.0 in) |
| 1933 | 50.5 mm (2.0 in) |
| 1934 | 45.2 mm (1.8 in) |
| 1935 | 40.4 mm (1.6 in) |
| 1936 | 56.6 mm (2.2 in) |
| 1937 | 45.2 mm (1.8 in) |
| 1938 | 68.6 mm (2.7 in) |
| 1939 | 39.6 mm (1.6 in) |
| 1940 | 68.1 mm (2.7 in) |
| 1941 | 56.1 mm (2.2 in) |
| 1942 | 33.8 mm (1.3 in) |
| 1943 | 72.9 mm (2.9 in) |
| 1944 | 33.8 mm (1.3 in) |
| 1945 | 75.7 mm (3.0 in) |
| 1946 | 29.0 mm (1.1 in) |
| 1947 | 73.9 mm (2.9 in) |
| 1948 | 45.7 mm (1.8 in) |
| 1949 | 47.8 mm (1.9 in) |
| 1950 | 57.4 mm (2.3 in) |
| 1951 | 59.7 mm (2.4 in) |
| 1952 | 51.6 mm (2.0 in) |
| 1953 | 33.8 mm (1.3 in) |
| 1954 | 68.8 mm (2.7 in) |
| 1955 | 33.5 mm (1.3 in) |
| 1956 | 53.1 mm (2.1 in) |
| 1957 | 41.9 mm (1.6 in) |
| 1958 | 36.8 mm (1.4 in) |
| 1959 | 66.8 mm (2.6 in) |
| 1960 | 57.9 mm (2.3 in) |
| 1961 | 62.0 mm (2.4 in) |
| 1962 | 42.9 mm (1.7 in) |
| 1963 | 71.6 mm (2.8 in) |
| 1964 | 78.2 mm (3.1 in) |
| 1965 | 72.6 mm (2.9 in) |
| 1966 | 51.6 mm (2.0 in) |
| 1967 | 45.2 mm (1.8 in) |
| 1968 | 37.1 mm (1.5 in) |
| 1969 | 71.9 mm (2.8 in) |
| 1970 | 58.4 mm (2.3 in) |
| 1971 | 56.9 mm (2.2 in) |
| 1972 | 101.6 mm (4.0 in) |
| 1973 | 40.6 mm (1.6 in) |
| 1974 | 37.6 mm (1.5 in) |
| 1975 | 44.5 mm (1.8 in) |
| 1976 | 56.6 mm (2.2 in) |
| 1977 | 34.8 mm (1.4 in) |
| 1978 | 51.1 mm (2.0 in) |
| 1979 | 55.9 mm (2.2 in) |
| 1980 | 49.0 mm (1.9 in) |
| 1981 | 47.8 mm (1.9 in) |
| 1982 | 86.4 mm (3.4 in) |
| 1983 | 70.9 mm (2.8 in) |
| 1984 | 94.0 mm (3.7 in) |
| 1985 | 50.8 mm (2.0 in) |
| 1986 | 78.7 mm (3.1 in) |
| 1987 | 82.3 mm (3.2 in) |
| 1988 | 35.3 mm (1.4 in) |
| 1989 | 37.8 mm (1.5 in) |
| 1990 | 53.8 mm (2.1 in) |
| 1991 | 71.4 mm (2.8 in) |
| 1992 | 37.3 mm (1.5 in) |
| 1993 | 68.3 mm (2.7 in) |
| 1994 | 52.1 mm (2.1 in) |
| 1995 | 76.2 mm (3.0 in) |
| 1996 | 61.0 mm (2.4 in) |
| 1997 | 63.5 mm (2.5 in) |
| 1998 | 76.2 mm (3.0 in) |
| 1999 | 63.0 mm (2.5 in) |
| 2000 | 55.9 mm (2.2 in) |
| 2001 | 76.5 mm (3.0 in) |
| 2002 | 32.5 mm (1.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1923 | 103.9 mm (4.1 in) |
| 1924 | 154.7 mm (6.1 in) |
| 1925 | 82.3 mm (3.2 in) |
| 1926 | 116.3 mm (4.6 in) |
| 1927 | 75.2 mm (3.0 in) |
| 1928 | 79.8 mm (3.1 in) |
| 1929 | 74.4 mm (2.9 in) |
| 1930 | 74.4 mm (2.9 in) |
| 1931 | 65.1 mm (2.6 in) |
| 1932 | 83.3 mm (3.3 in) |
| 1933 | 82.2 mm (3.2 in) |
| 1934 | 73.2 mm (2.9 in) |
| 1935 | 116.8 mm (4.6 in) |
| 1936 | 112.0 mm (4.4 in) |
| 1937 | 68.6 mm (2.7 in) |
| 1938 | 114.7 mm (4.5 in) |
| 1939 | 53.6 mm (2.1 in) |
| 1940 | 164.8 mm (6.5 in) |
| 1941 | 106.8 mm (4.2 in) |
| 1942 | 50.9 mm (2.0 in) |
| 1943 | 89.2 mm (3.5 in) |
| 1944 | 49.1 mm (1.9 in) |
| 1945 | 116.6 mm (4.6 in) |
| 1946 | 48.5 mm (1.9 in) |
| 1947 | 73.9 mm (2.9 in) |
| 1948 | 66.0 mm (2.6 in) |
| 1949 | 101.8 mm (4.0 in) |
| 1950 | 115.2 mm (4.5 in) |
| 1951 | 78.5 mm (3.1 in) |
| 1952 | 72.5 mm (2.9 in) |
| 1953 | 52.4 mm (2.1 in) |
| 1954 | 91.8 mm (3.6 in) |
| 1955 | 73.8 mm (2.9 in) |
| 1956 | 123.2 mm (4.9 in) |
| 1957 | 54.6 mm (2.1 in) |
| 1958 | 54.1 mm (2.1 in) |
| 1959 | 91.4 mm (3.6 in) |
| 1960 | 79.7 mm (3.1 in) |
| 1961 | 87.2 mm (3.4 in) |
| 1962 | 43.2 mm (1.7 in) |
| 1963 | 74.4 mm (2.9 in) |
| 1964 | 83.5 mm (3.3 in) |
| 1965 | 91.4 mm (3.6 in) |
| 1966 | 67.2 mm (2.6 in) |
| 1967 | 102.1 mm (4.0 in) |
| 1968 | 61.5 mm (2.4 in) |
| 1969 | 114.3 mm (4.5 in) |
| 1970 | 87.9 mm (3.5 in) |
| 1971 | 72.6 mm (2.9 in) |
| 1972 | 135.2 mm (5.3 in) |
| 1973 | 63.8 mm (2.5 in) |
| 1974 | 92.4 mm (3.6 in) |
| 1975 | 71.6 mm (2.8 in) |
| 1976 | 79.0 mm (3.1 in) |
| 1977 | 47.4 mm (1.9 in) |
| 1978 | 75.2 mm (3.0 in) |
| 1979 | 97.9 mm (3.9 in) |
| 1980 | 59.2 mm (2.3 in) |
| 1981 | 105.4 mm (4.1 in) |
| 1982 | 121.8 mm (4.8 in) |
| 1983 | 85.1 mm (3.4 in) |
| 1984 | 109.2 mm (4.3 in) |
| 1985 | 62.0 mm (2.4 in) |
| 1986 | 248.8 mm (9.8 in) |
| 1987 | 159.0 mm (6.3 in) |
| 1988 | 49.0 mm (1.9 in) |
| 1989 | 76.6 mm (3.0 in) |
| 1990 | 121.1 mm (4.8 in) |
| 1991 | 71.9 mm (2.8 in) |
| 1992 | 64.0 mm (2.5 in) |
| 1993 | 104.9 mm (4.1 in) |
| 1994 | 98.4 mm (3.9 in) |
| 1995 | 76.2 mm (3.0 in) |
| 1996 | 102.0 mm (4.0 in) |
| 1997 | 78.0 mm (3.1 in) |
| 1998 | 89.9 mm (3.5 in) |
| 1999 | 86.8 mm (3.4 in) |
| 2000 | 77.7 mm (3.1 in) |
| 2001 | 103.9 mm (4.1 in) |
| 2002 | 43.2 mm (1.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1923 | 21 days |
| 1924 | 17 days |
| 1925 | 24 days |
| 1926 | 16 days |
| 1927 | 19 days |
| 1928 | 19 days |
| 1929 | 20 days |
| 1930 | 19 days |
| 1931 | 27 days |
| 1932 | 29 days |
| 1933 | 38 days |
| 1934 | 19 days |
| 1935 | 14 days |
| 1936 | 26 days |
| 1937 | 13 days |
| 1938 | 19 days |
| 1939 | 30 days |
| 1940 | 23 days |
| 1941 | 14 days |
| 1942 | 15 days |
| 1943 | 20 days |
| 1944 | 30 days |
| 1945 | 20 days |
| 1946 | 20 days |
| 1947 | 19 days |
| 1948 | 22 days |
| 1949 | 20 days |
| 1950 | 25 days |
| 1951 | 16 days |
| 1952 | 55 days |
| 1953 | 22 days |
| 1954 | 17 days |
| 1955 | 20 days |
| 1956 | 17 days |
| 1957 | 28 days |
| 1958 | 19 days |
| 1959 | 21 days |
| 1960 | 19 days |
| 1961 | 23 days |
| 1962 | 17 days |
| 1963 | 16 days |
| 1964 | 20 days |
| 1965 | 20 days |
| 1966 | 17 days |
| 1967 | 19 days |
| 1968 | 29 days |
| 1969 | 39 days |
| 1970 | 18 days |
| 1971 | 23 days |
| 1972 | 15 days |
| 1973 | 17 days |
| 1974 | 10 days |
| 1975 | 15 days |
| 1976 | 26 days |
| 1977 | 18 days |
| 1978 | 22 days |
| 1979 | 33 days |
| 1980 | 18 days |
| 1981 | 24 days |
| 1982 | 17 days |
| 1983 | 14 days |
| 1984 | 19 days |
| 1985 | 13 days |
| 1986 | 23 days |
| 1987 | 21 days |
| 1988 | 29 days |
| 1989 | 21 days |
| 1990 | 17 days |
| 1991 | 14 days |
| 1992 | 23 days |
| 1993 | 18 days |
| 1994 | 20 days |
| 1995 | 33 days |
| 1996 | 19 days |
| 1997 | 23 days |
| 1998 | 21 days |
| 1999 | 37 days |
| 2000 | 16 days |
| 2001 | 26 days |
| 2002 | 18 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
41 years with a frostAcross 41 years with a frost, the median last spring frost at Waukegan falls on 27 April and the median first autumn frost on 14 October, which leaves a median of 174 days between them.
Fitted over all years, the growing season changes by +0.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1960 to 2000) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 April | n/a | 28 April | n/a | -0.1 days per decade |
| First autumn frost | 14 October | n/a | 16 October | n/a | +0.6 days per decade |
| Growing days | 174 days | n/a | 176 days | n/a | +0.7 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
72 years, 1923 to 2001A day with at least 55.2 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 94.3 mm (3.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 55.2 mm (2.2 in) | |
| 5 years | 68.8 mm (2.7 in) | |
| 10 years | 76.4 mm (3.0 in) | |
| 25 years | 84.6 mm (3.3 in) | |
| 50 years | 89.8 mm (3.5 in) | |
| 100 years | 94.3 mm (3.7 in) | Longer than the 72 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, 72 years of values from 1923 to 2001.
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: 101.6 mm (4.0 in) in 1972; 86.4 mm (3.4 in) in 1982; 82.3 mm (3.2 in) in 1987.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).