Oswego Weather Records (USC00306314)
Record envelope, standing records and threshold days for Oswego (USC00306314), New York, United States, with 101 years of record.
Key Facts for Oswego
- Oswego (USC00306314) is a weather station in New York, United States at 43.45 latitude and -76.54 longitude, 99 m (324 ft) above sea level.
- The station reports from 1926 to 2026, 101 years of record.
- 1,464 records set at Oswego still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Oswego tied a daily record high minimum temperature of 22.2 C (72.0 F) on 15 July 2026.
About the Station
- Location: New York, United States, 43.45 latitude, -76.54 longitude.
- Elevation: 99 m (324 ft).
- Period of record: 1926 to 2026, 101 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 20.6 C (69.1 F) | -29.4 C (-20.9 F) | 11.1 C (52.0 F) | -16.7 C (1.9 F) |
| Feb | 21.1 C (70.0 F) | -29.4 C (-20.9 F) | 10.0 C (50.0 F) | -21.1 C (-6.0 F) |
| Mar | 28.3 C (82.9 F) | -22.8 C (-9.0 F) | 22.2 C (72.0 F) | -13.3 C (8.1 F) |
| Apr | 32.2 C (90.0 F) | -10.6 C (12.9 F) | 26.1 C (79.0 F) | -6.1 C (21.0 F) |
| May | 32.8 C (91.0 F) | -2.2 C (28.0 F) | 31.7 C (89.1 F) | 1.7 C (35.1 F) |
| Jun | 35.6 C (96.1 F) | 2.2 C (36.0 F) | 29.4 C (84.9 F) | 8.3 C (46.9 F) |
| Jul | 35.0 C (95.0 F) | 6.7 C (44.1 F) | 33.9 C (93.0 F) | 12.8 C (55.0 F) |
| Aug | 36.1 C (97.0 F) | 5.6 C (42.1 F) | 30.6 C (87.1 F) | 12.8 C (55.0 F) |
| Sep | 35.6 C (96.1 F) | -1.1 C (30.0 F) | 28.9 C (84.0 F) | 6.7 C (44.1 F) |
| Oct | 30.0 C (86.0 F) | -6.1 C (21.0 F) | 22.2 C (72.0 F) | 5.6 C (42.1 F) |
| Nov | 26.1 C (79.0 F) | -15.6 C (3.9 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 |
|---|---|
| 1926 | 31 |
| 1927 | 13 |
| 1928 | 20 |
| 1929 | 18 |
| 1930 | 23 |
| 1931 | 15 |
| 1932 | 22 |
| 1933 | 26 |
| 1934 | 28 |
| 1935 | 12 |
| 1936 | 29 |
| 1937 | 10 |
| 1938 | 17 |
| 1939 | 10 |
| 1940 | 27 |
| 1941 | 11 |
| 1942 | 12 |
| 1943 | 24 |
| 1944 | 12 |
| 1945 | 20 |
| 1946 | 14 |
| 1947 | 20 |
| 1948 | 11 |
| 1949 | 20 |
| 1950 | 20 |
| 1951 | 19 |
| 1952 | 7 |
| 1953 | 15 |
| 1954 | 13 |
| 1955 | 9 |
| 1956 | 16 |
| 1957 | 16 |
| 1958 | 6 |
| 1959 | 26 |
| 1960 | 3 |
| 1961 | 11 |
| 1962 | 18 |
| 1963 | 18 |
| 1964 | 16 |
| 1965 | 17 |
| 1966 | 11 |
| 1967 | 11 |
| 1968 | 15 |
| 1969 | 14 |
| 1970 | 16 |
| 1971 | 9 |
| 1972 | 19 |
| 1973 | 12 |
| 1974 | 18 |
| 1975 | 4 |
| 1976 | 24 |
| 1977 | 16 |
| 1978 | 10 |
| 1979 | 31 |
| 1980 | 16 |
| 1981 | 20 |
| 1982 | 18 |
| 1983 | 12 |
| 1984 | 18 |
| 1985 | 10 |
| 1986 | 8 |
| 1987 | 11 |
| 1988 | 17 |
| 1989 | 18 |
| 1990 | 14 |
| 1991 | 17 |
| 1992 | 8 |
| 1993 | 12 |
| 1994 | 11 |
| 1995 | 13 |
| 1996 | 12 |
| 1997 | 5 |
| 1998 | 11 |
| 1999 | 11 |
| 2000 | 9 |
| 2001 | 15 |
| 2002 | 14 |
| 2003 | 3 |
| 2004 | 9 |
| 2005 | 11 |
| 2006 | 6 |
| 2007 | 9 |
| 2008 | 12 |
| 2009 | 5 |
| 2010 | 8 |
| 2011 | 8 |
| 2012 | 22 |
| 2013 | 9 |
| 2014 | 10 |
| 2015 | 19 |
| 2016 | 8 |
| 2017 | 22 |
| 2018 | 16 |
| 2019 | 7 |
| 2020 | 17 |
| 2021 | 21 |
| 2022 | 12 |
| 2023 | 10 |
| 2024 | 22 |
| 2025 | 7 |
| 2026 | 6 |
All-Time Record Progression
11 new records| Date | Kind | Detail |
|---|---|---|
| 1956-02-01 | Record daily snowfall | Record daily snowfall 50.8 cm (20.0 in) |
| 1958-12-08 | Record daily snowfall | Record daily snowfall 101.6 cm (40.0 in) |
| 1958-12-08 | Record snow depth | Record snow depth 111.8 cm (44.0 in) |
| 1958-12-09 | Record snow depth | Record snow depth 119.4 cm (47.0 in) |
| 1963-07-02 | Record high minimum temperature | Record high minimum temperature 26.7 C (80.1 F) |
| 1963-11-30 | Record daily precipitation | Record daily precipitation 82.6 mm (3.3 in) |
| 1966-01-31 | Record snow depth | Record snow depth 127.0 cm (50.0 in) |
| 1966-02-01 | Record snow depth | Record snow depth 193.0 cm (76.0 in) |
| 1966-02-05 | Record snow depth | Record snow depth 198.1 cm (78.0 in) |
| 1974-07-03 | Record daily precipitation | Record daily precipitation 96.5 mm (3.8 in) |
| 2002-08-14 | Record high maximum temperature | Record high maximum temperature 36.1 C (97.0 F) |
Wettest Day of Each Month
Jul: 96.5 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 62.7 mm (2.5 in) | 8 January 1998 |
| Feb | 54.6 mm (2.1 in) | 26 February 1961 |
| Mar | 68.3 mm (2.7 in) | 4 March 1971 |
| Apr | 50.8 mm (2.0 in) | 4 April 2003 |
| May | 52.8 mm (2.1 in) | 13 May 2000 |
| Jun | 76.2 mm (3.0 in) | 20 June 2019 |
| Jul | 96.5 mm (3.8 in) | 3 July 1974 |
| Aug | 86.6 mm (3.4 in) | 31 August 2005 |
| Sep | 88.9 mm (3.5 in) | 30 September 2010 |
| Oct | 84.3 mm (3.3 in) | 21 October 1995 |
| Nov | 82.6 mm (3.3 in) | 30 November 1963 |
| Dec | 64.0 mm (2.5 in) | 1 December 2010 |
Period of Record Coverage
1926 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1926 | 364 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 364 | 99% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 361 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 356 | 98% | Yes |
| 1955 | 339 | 93% | Yes |
| 1956 | 342 | 93% | Yes |
| 1957 | 314 | 86% | No |
| 1958 | 347 | 95% | Yes |
| 1959 | 344 | 94% | Yes |
| 1960 | 344 | 94% | Yes |
| 1961 | 348 | 95% | Yes |
| 1962 | 357 | 98% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 358 | 98% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 362 | 99% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 363 | 99% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 364 | 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 | 353 | 97% | Yes |
| 2020 | 347 | 95% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 282 | 77% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 15 July 2026 | Oswego, US | daily high min (Tie) | 22.2 C (72.0 F) | tie | 73 years | 8 of 100 (Routine) |
| 14 July 2026 | Oswego, US | daily high min (Tie) | 22.8 C (73.0 F) | tie | 89 years | 9 of 100 (Routine) |
| 1 July 2026 | Oswego, US | daily high max | 33.9 C (93.0 F) | 2.2 C (4.0 F) | 63 years | 34 of 100 (Routine) |
| 19 May 2026 | Oswego, US | daily high min | 20.0 C (68.0 F) | 3.3 C (5.9 F) | 95 years | 45 of 100 (Notable) |
| 18 May 2026 | Oswego, US | daily high max | 31.7 C (89.1 F) | 0.6 C (1.1 F) | 8 years | 13 of 100 (Routine) |
| 17 May 2026 | Oswego, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 64 years | 7 of 100 (Routine) |
| 6 May 2026 | Oswego, US | daily rain | 16.8 mm (0.7 in) | 4.1 mm (0.16 in) | 16 years | 19 of 100 (Routine) |
| 31 March 2026 | Oswego, US | daily rain | 43.2 mm (1.7 in) | 8.9 mm (0.35 in) | 52 years | 39 of 100 (Notable) |
| 17 March 2026 | Oswego, US | daily snowfall | 14.0 cm (5.5 in) | 1.3 cm (0.5 in) | 69 years | 32 of 100 (Routine) |
| 10 March 2026 | Oswego, US | daily high max | 22.2 C (72.0 F) | 4.4 C (7.9 F) | 24 years | 23 of 100 (Routine) |
| 10 March 2026 | Oswego, US | daily high min | 12.2 C (54.0 F) | 2.8 C (5.0 F) | 9 years | 17 of 100 (Routine) |
| 29 January 2026 | Oswego, US | daily rain | 18.8 mm (0.7 in) | 5.6 mm (0.22 in) | 68 years | 20 of 100 (Routine) |
| 25 January 2026 | Oswego, US | daily low max | -12.8 C (9.0 F) | 0.6 C (1.1 F) | 80 years | 35 of 100 (Notable) |
| 18 December 2025 | Oswego, US | daily high max | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 59 years | 29 of 100 (Routine) |
| 24 October 2025 | Oswego, US | daily rain | 53.3 mm (2.1 in) | 22.1 mm (0.9 in) | 12 years | 35 of 100 (Notable) |
| 4 September 2025 | Oswego, US | daily rain | 20.6 mm (0.8 in) | 7.6 mm (0.30 in) | 55 years | 20 of 100 (Routine) |
| 25 July 2025 | Oswego, US | daily high max | 33.3 C (91.9 F) | 0.5 C (0.9 F) | 80 years | 35 of 100 (Notable) |
| 25 July 2025 | Oswego, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 84 years | 8 of 100 (Routine) |
| 13 July 2025 | Oswego, US | daily high min | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 59 years | 30 of 100 (Routine) |
| 7 July 2025 | Oswego, US | daily high min | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 39 years | 26 of 100 (Routine) |
Climate Trend
97 complete years, 1926 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1926 | 6.4 C | -2.42 C |
| 1927 | 8.2 C | -0.63 C |
| 1928 | 8.2 C | -0.61 C |
| 1929 | 8.1 C | -0.75 C |
| 1930 | 8.5 C | -0.34 C |
| 1931 | 9.7 C | +0.88 C |
| 1932 | 8.9 C | +0.08 C |
| 1933 | 8.9 C | +0.01 C |
| 1934 | 7.6 C | -1.22 C |
| 1935 | 7.8 C | -1.02 C |
| 1936 | 8.0 C | -0.87 C |
| 1937 | 8.8 C | -0.04 C |
| 1938 | 9.1 C | +0.28 C |
| 1939 | 8.3 C | -0.58 C |
| 1940 | 7.2 C | -1.70 C |
| 1941 | 8.7 C | -0.16 C |
| 1942 | 8.6 C | -0.27 C |
| 1943 | 7.5 C | -1.37 C |
| 1944 | 8.4 C | -0.44 C |
| 1945 | 8.4 C | -0.45 C |
| 1946 | 9.1 C | +0.23 C |
| 1947 | 8.6 C | -0.27 C |
| 1948 | 8.6 C | -0.30 C |
| 1949 | 9.9 C | +1.09 C |
| 1950 | 8.2 C | -0.64 C |
| 1951 | 8.7 C | -0.14 C |
| 1952 | 9.3 C | +0.41 C |
| 1953 | 9.9 C | +1.03 C |
| 1954 | 8.8 C | -0.10 C |
| 1955 | 9.0 C | +0.12 C |
| 1956 | 8.0 C | -0.84 C |
| 1958 | 8.0 C | -0.81 C |
| 1959 | 9.0 C | +0.16 C |
| 1960 | 8.5 C | -0.37 C |
| 1961 | 8.9 C | +0.09 C |
| 1962 | 8.3 C | -0.60 C |
| 1963 | 7.6 C | -1.29 C |
| 1964 | 8.4 C | -0.43 C |
| 1965 | 8.0 C | -0.89 C |
| 1966 | 8.7 C | -0.19 C |
| 1967 | 8.8 C | -0.07 C |
| 1968 | 8.0 C | -0.85 C |
| 1969 | 8.3 C | -0.51 C |
| 1970 | 8.4 C | -0.45 C |
| 1971 | 8.4 C | -0.42 C |
| 1972 | 7.6 C | -1.24 C |
| 1973 | 9.6 C | +0.73 C |
| 1974 | 8.4 C | -0.42 C |
| 1975 | 9.2 C | +0.30 C |
| 1976 | 7.9 C | -0.99 C |
| 1977 | 8.4 C | -0.50 C |
| 1978 | 7.6 C | -1.24 C |
| 1979 | 8.5 C | -0.40 C |
| 1980 | 7.8 C | -1.06 C |
| 1981 | 8.5 C | -0.36 C |
| 1982 | 8.5 C | -0.36 C |
| 1983 | 9.0 C | +0.17 C |
| 1984 | 8.9 C | +0.02 C |
| 1985 | 8.7 C | -0.17 C |
| 1986 | 8.8 C | -0.02 C |
| 1987 | 9.7 C | +0.86 C |
| 1988 | 8.9 C | +0.08 C |
| 1989 | 8.0 C | -0.82 C |
| 1990 | 9.9 C | +1.09 C |
| 1991 | 10.0 C | +1.15 C |
| 1992 | 8.0 C | -0.88 C |
| 1993 | 8.2 C | -0.61 C |
| 1994 | 8.4 C | -0.47 C |
| 1995 | 8.9 C | +0.04 C |
| 1996 | 8.3 C | -0.55 C |
| 1997 | 8.4 C | -0.46 C |
| 1998 | 10.6 C | +1.78 C |
| 1999 | 10.2 C | +1.30 C |
| 2000 | 9.0 C | +0.17 C |
| 2001 | 10.2 C | +1.34 C |
| 2002 | 9.9 C | +1.09 C |
| 2003 | 8.2 C | -0.63 C |
| 2004 | 8.4 C | -0.50 C |
| 2005 | 9.2 C | +0.31 C |
| 2006 | 10.0 C | +1.12 C |
| 2007 | 9.0 C | +0.10 C |
| 2008 | 8.9 C | +0.04 C |
| 2009 | 8.7 C | -0.20 C |
| 2010 | 10.2 C | +1.30 C |
| 2011 | 10.0 C | +1.17 C |
| 2012 | 11.2 C | +2.30 C |
| 2013 | 9.3 C | +0.48 C |
| 2014 | 8.5 C | -0.40 C |
| 2015 | 9.0 C | +0.16 C |
| 2016 | 10.1 C | +1.28 C |
| 2017 | 9.9 C | +1.06 C |
| 2018 | 9.5 C | +0.62 C |
| 2021 | 11.1 C | +2.24 C |
| 2022 | 10.4 C | +1.55 C |
| 2023 | 10.9 C | +2.07 C |
| 2024 | 11.6 C | +2.73 C |
| 2025 | 10.0 C | +1.14 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1926 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 97 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 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1926 to 2025 | 97 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1926 to 2025 | 97 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1926 to 2025 | 97 | 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
1926 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.1 C (97.0 F) | 2002 | 33.3 C (91.9 F) | 101 |
| Coldest night (TNn) | -30.6 C (-23.1 F) | 1933 | -21.1 C (-6.0 F) | 101 |
| Wettest day (Rx1day) | 96.5 mm (3.8 in) | 1974 | 46.2 mm (1.8 in) | 101 |
| Wettest five days (Rx5day) | 130.3 mm (5.1 in) | 1975 | 73.2 mm (2.9 in) | 101 |
| Longest dry spell (CDD) | 30 days | 1954 | 15 days | 101 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1926 | 31.7 C (89.1 F) |
| 1927 | 32.8 C (91.0 F) |
| 1928 | 33.3 C (91.9 F) |
| 1929 | 33.3 C (91.9 F) |
| 1930 | 33.9 C (93.0 F) |
| 1931 | 33.9 C (93.0 F) |
| 1932 | 32.8 C (91.0 F) |
| 1933 | 34.4 C (93.9 F) |
| 1934 | 34.4 C (93.9 F) |
| 1935 | 32.2 C (90.0 F) |
| 1936 | 34.4 C (93.9 F) |
| 1937 | 32.2 C (90.0 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 34.4 C (93.9 F) |
| 1940 | 31.7 C (89.1 F) |
| 1941 | 35.6 C (96.1 F) |
| 1942 | 33.3 C (91.9 F) |
| 1943 | 33.3 C (91.9 F) |
| 1944 | 35.6 C (96.1 F) |
| 1945 | 32.8 C (91.0 F) |
| 1946 | 34.4 C (93.9 F) |
| 1947 | 35.0 C (95.0 F) |
| 1948 | 34.4 C (93.9 F) |
| 1949 | 33.9 C (93.0 F) |
| 1950 | 31.1 C (88.0 F) |
| 1951 | 31.1 C (88.0 F) |
| 1952 | 35.0 C (95.0 F) |
| 1953 | 35.6 C (96.1 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 32.8 C (91.0 F) |
| 1956 | 31.1 C (88.0 F) |
| 1957 | 33.9 C (93.0 F) |
| 1958 | 32.8 C (91.0 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 31.7 C (89.1 F) |
| 1961 | 33.3 C (91.9 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 33.3 C (91.9 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 34.4 C (93.9 F) |
| 1966 | 32.8 C (91.0 F) |
| 1967 | 30.0 C (86.0 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 31.7 C (89.1 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 31.7 C (89.1 F) |
| 1973 | 32.2 C (90.0 F) |
| 1974 | 30.6 C (87.1 F) |
| 1975 | 32.2 C (90.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 33.3 C (91.9 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 31.7 C (89.1 F) |
| 1980 | 31.1 C (88.0 F) |
| 1981 | 30.6 C (87.1 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 33.9 C (93.0 F) |
| 1984 | 32.8 C (91.0 F) |
| 1985 | 32.2 C (90.0 F) |
| 1986 | 32.2 C (90.0 F) |
| 1987 | 33.9 C (93.0 F) |
| 1988 | 35.0 C (95.0 F) |
| 1989 | 31.7 C (89.1 F) |
| 1990 | 32.2 C (90.0 F) |
| 1991 | 33.3 C (91.9 F) |
| 1992 | 30.6 C (87.1 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 33.9 C (93.0 F) |
| 1996 | 31.7 C (89.1 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 31.7 C (89.1 F) |
| 1999 | 34.4 C (93.9 F) |
| 2000 | 30.0 C (86.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 31.7 C (89.1 F) |
| 2004 | 30.6 C (87.1 F) |
| 2005 | 33.9 C (93.0 F) |
| 2006 | 33.9 C (93.0 F) |
| 2007 | 33.9 C (93.0 F) |
| 2008 | 32.2 C (90.0 F) |
| 2009 | 32.2 C (90.0 F) |
| 2010 | 32.8 C (91.0 F) |
| 2011 | 35.0 C (95.0 F) |
| 2012 | 34.4 C (93.9 F) |
| 2013 | 34.4 C (93.9 F) |
| 2014 | 31.7 C (89.1 F) |
| 2015 | 31.7 C (89.1 F) |
| 2016 | 34.4 C (93.9 F) |
| 2017 | 32.2 C (90.0 F) |
| 2018 | 33.9 C (93.0 F) |
| 2019 | 32.2 C (90.0 F) |
| 2020 | 32.8 C (91.0 F) |
| 2021 | 32.2 C (90.0 F) |
| 2022 | 32.8 C (91.0 F) |
| 2023 | 32.2 C (90.0 F) |
| 2024 | 32.8 C (91.0 F) |
| 2025 | 33.3 C (91.9 F) |
| 2026 | 33.9 C (93.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1926 | -21.7 C (-7.1 F) |
| 1927 | -23.3 C (-9.9 F) |
| 1928 | -21.1 C (-6.0 F) |
| 1929 | -17.2 C (1.0 F) |
| 1930 | -22.2 C (-8.0 F) |
| 1931 | -21.7 C (-7.1 F) |
| 1932 | -18.3 C (-0.9 F) |
| 1933 | -30.6 C (-23.1 F) |
| 1934 | -29.4 C (-20.9 F) |
| 1935 | -22.2 C (-8.0 F) |
| 1936 | -20.0 C (-4.0 F) |
| 1937 | -14.4 C (6.1 F) |
| 1938 | -22.2 C (-8.0 F) |
| 1939 | -22.8 C (-9.0 F) |
| 1940 | -18.3 C (-0.9 F) |
| 1941 | -18.9 C (-2.0 F) |
| 1942 | -28.9 C (-20.0 F) |
| 1943 | -27.2 C (-17.0 F) |
| 1944 | -17.2 C (1.0 F) |
| 1945 | -22.8 C (-9.0 F) |
| 1946 | -22.8 C (-9.0 F) |
| 1947 | -17.2 C (1.0 F) |
| 1948 | -25.0 C (-13.0 F) |
| 1949 | -14.4 C (6.1 F) |
| 1950 | -22.8 C (-9.0 F) |
| 1951 | -21.1 C (-6.0 F) |
| 1952 | -20.0 C (-4.0 F) |
| 1953 | -15.6 C (3.9 F) |
| 1954 | -19.4 C (-2.9 F) |
| 1955 | -21.1 C (-6.0 F) |
| 1956 | -19.4 C (-2.9 F) |
| 1957 | -29.4 C (-20.9 F) |
| 1958 | -19.4 C (-2.9 F) |
| 1959 | -20.0 C (-4.0 F) |
| 1960 | -18.9 C (-2.0 F) |
| 1961 | -23.3 C (-9.9 F) |
| 1962 | -25.0 C (-13.0 F) |
| 1963 | -21.7 C (-7.1 F) |
| 1964 | -20.6 C (-5.1 F) |
| 1965 | -24.4 C (-11.9 F) |
| 1966 | -22.2 C (-8.0 F) |
| 1967 | -21.7 C (-7.1 F) |
| 1968 | -27.2 C (-17.0 F) |
| 1969 | -21.1 C (-6.0 F) |
| 1970 | -23.9 C (-11.0 F) |
| 1971 | -20.6 C (-5.1 F) |
| 1972 | -22.2 C (-8.0 F) |
| 1973 | -22.2 C (-8.0 F) |
| 1974 | -20.6 C (-5.1 F) |
| 1975 | -21.7 C (-7.1 F) |
| 1976 | -25.0 C (-13.0 F) |
| 1977 | -20.0 C (-4.0 F) |
| 1978 | -25.6 C (-14.1 F) |
| 1979 | -28.9 C (-20.0 F) |
| 1980 | -26.7 C (-16.1 F) |
| 1981 | -24.4 C (-11.9 F) |
| 1982 | -25.0 C (-13.0 F) |
| 1983 | -21.7 C (-7.1 F) |
| 1984 | -23.3 C (-9.9 F) |
| 1985 | -21.1 C (-6.0 F) |
| 1986 | -21.1 C (-6.0 F) |
| 1987 | -22.2 C (-8.0 F) |
| 1988 | -24.4 C (-11.9 F) |
| 1989 | -23.3 C (-9.9 F) |
| 1990 | -18.9 C (-2.0 F) |
| 1991 | -18.9 C (-2.0 F) |
| 1992 | -21.1 C (-6.0 F) |
| 1993 | -24.4 C (-11.9 F) |
| 1994 | -26.1 C (-15.0 F) |
| 1995 | -20.6 C (-5.1 F) |
| 1996 | -23.3 C (-9.9 F) |
| 1997 | -19.4 C (-2.9 F) |
| 1998 | -16.7 C (1.9 F) |
| 1999 | -21.1 C (-6.0 F) |
| 2000 | -18.9 C (-2.0 F) |
| 2001 | -14.4 C (6.1 F) |
| 2002 | -15.6 C (3.9 F) |
| 2003 | -22.2 C (-8.0 F) |
| 2004 | -25.6 C (-14.1 F) |
| 2005 | -25.6 C (-14.1 F) |
| 2006 | -15.0 C (5.0 F) |
| 2007 | -18.9 C (-2.0 F) |
| 2008 | -17.2 C (1.0 F) |
| 2009 | -16.1 C (3.0 F) |
| 2010 | -21.1 C (-6.0 F) |
| 2011 | -23.9 C (-11.0 F) |
| 2012 | -17.8 C (0.0 F) |
| 2013 | -19.4 C (-2.9 F) |
| 2014 | -20.6 C (-5.1 F) |
| 2015 | -20.6 C (-5.1 F) |
| 2016 | -26.1 C (-15.0 F) |
| 2017 | -17.8 C (0.0 F) |
| 2018 | -21.7 C (-7.1 F) |
| 2019 | -19.4 C (-2.9 F) |
| 2020 | -10.0 C (14.0 F) |
| 2021 | -15.0 C (5.0 F) |
| 2022 | -21.1 C (-6.0 F) |
| 2023 | -22.8 C (-9.0 F) |
| 2024 | -16.1 C (3.0 F) |
| 2025 | -16.1 C (3.0 F) |
| 2026 | -21.1 C (-6.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1926 | 52.8 mm (2.1 in) |
| 1927 | 47.0 mm (1.9 in) |
| 1928 | 32.5 mm (1.3 in) |
| 1929 | 38.4 mm (1.5 in) |
| 1930 | 38.6 mm (1.5 in) |
| 1931 | 46.2 mm (1.8 in) |
| 1932 | 37.8 mm (1.5 in) |
| 1933 | 51.3 mm (2.0 in) |
| 1934 | 26.4 mm (1.0 in) |
| 1935 | 25.9 mm (1.0 in) |
| 1936 | 39.1 mm (1.5 in) |
| 1937 | 47.5 mm (1.9 in) |
| 1938 | 29.2 mm (1.1 in) |
| 1939 | 27.9 mm (1.1 in) |
| 1940 | 27.7 mm (1.1 in) |
| 1941 | 44.7 mm (1.8 in) |
| 1942 | 49.8 mm (2.0 in) |
| 1943 | 40.4 mm (1.6 in) |
| 1944 | 37.1 mm (1.5 in) |
| 1945 | 67.8 mm (2.7 in) |
| 1946 | 40.6 mm (1.6 in) |
| 1947 | 44.5 mm (1.8 in) |
| 1948 | 35.8 mm (1.4 in) |
| 1949 | 30.0 mm (1.2 in) |
| 1950 | 53.8 mm (2.1 in) |
| 1951 | 30.0 mm (1.2 in) |
| 1952 | 49.3 mm (1.9 in) |
| 1953 | 40.6 mm (1.6 in) |
| 1954 | 40.6 mm (1.6 in) |
| 1955 | 68.6 mm (2.7 in) |
| 1956 | 25.7 mm (1.0 in) |
| 1957 | 38.1 mm (1.5 in) |
| 1958 | 63.5 mm (2.5 in) |
| 1959 | 64.5 mm (2.5 in) |
| 1960 | 26.9 mm (1.1 in) |
| 1961 | 54.6 mm (2.1 in) |
| 1962 | 39.4 mm (1.6 in) |
| 1963 | 82.6 mm (3.3 in) |
| 1964 | 40.6 mm (1.6 in) |
| 1965 | 44.5 mm (1.8 in) |
| 1966 | 43.2 mm (1.7 in) |
| 1967 | 64.8 mm (2.6 in) |
| 1968 | 34.5 mm (1.4 in) |
| 1969 | 40.1 mm (1.6 in) |
| 1970 | 52.6 mm (2.1 in) |
| 1971 | 68.3 mm (2.7 in) |
| 1972 | 45.0 mm (1.8 in) |
| 1973 | 33.0 mm (1.3 in) |
| 1974 | 96.5 mm (3.8 in) |
| 1975 | 84.3 mm (3.3 in) |
| 1976 | 45.2 mm (1.8 in) |
| 1977 | 43.4 mm (1.7 in) |
| 1978 | 61.5 mm (2.4 in) |
| 1979 | 63.0 mm (2.5 in) |
| 1980 | 53.8 mm (2.1 in) |
| 1981 | 50.5 mm (2.0 in) |
| 1982 | 46.0 mm (1.8 in) |
| 1983 | 31.5 mm (1.2 in) |
| 1984 | 40.4 mm (1.6 in) |
| 1985 | 39.1 mm (1.5 in) |
| 1986 | 37.3 mm (1.5 in) |
| 1987 | 37.6 mm (1.5 in) |
| 1988 | 45.7 mm (1.8 in) |
| 1989 | 47.5 mm (1.9 in) |
| 1990 | 33.3 mm (1.3 in) |
| 1991 | 47.0 mm (1.9 in) |
| 1992 | 74.2 mm (2.9 in) |
| 1993 | 46.0 mm (1.8 in) |
| 1994 | 56.1 mm (2.2 in) |
| 1995 | 84.3 mm (3.3 in) |
| 1996 | 63.0 mm (2.5 in) |
| 1997 | 48.5 mm (1.9 in) |
| 1998 | 62.7 mm (2.5 in) |
| 1999 | 57.4 mm (2.3 in) |
| 2000 | 52.8 mm (2.1 in) |
| 2001 | 44.7 mm (1.8 in) |
| 2002 | 50.3 mm (2.0 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 67.1 mm (2.6 in) |
| 2005 | 86.6 mm (3.4 in) |
| 2006 | 41.1 mm (1.6 in) |
| 2007 | 35.6 mm (1.4 in) |
| 2008 | 47.0 mm (1.9 in) |
| 2009 | 35.8 mm (1.4 in) |
| 2010 | 88.9 mm (3.5 in) |
| 2011 | 71.1 mm (2.8 in) |
| 2012 | 49.5 mm (1.9 in) |
| 2013 | 49.5 mm (1.9 in) |
| 2014 | 38.4 mm (1.5 in) |
| 2015 | 62.2 mm (2.4 in) |
| 2016 | 61.7 mm (2.4 in) |
| 2017 | 77.0 mm (3.0 in) |
| 2018 | 30.5 mm (1.2 in) |
| 2019 | 76.2 mm (3.0 in) |
| 2020 | 41.4 mm (1.6 in) |
| 2021 | 60.7 mm (2.4 in) |
| 2022 | 57.7 mm (2.3 in) |
| 2023 | 81.8 mm (3.2 in) |
| 2024 | 64.0 mm (2.5 in) |
| 2025 | 53.3 mm (2.1 in) |
| 2026 | 43.2 mm (1.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1926 | 74.9 mm (2.9 in) |
| 1927 | 76.8 mm (3.0 in) |
| 1928 | 53.8 mm (2.1 in) |
| 1929 | 58.2 mm (2.3 in) |
| 1930 | 49.8 mm (2.0 in) |
| 1931 | 115.8 mm (4.6 in) |
| 1932 | 75.7 mm (3.0 in) |
| 1933 | 69.9 mm (2.8 in) |
| 1934 | 39.9 mm (1.6 in) |
| 1935 | 52.6 mm (2.1 in) |
| 1936 | 62.0 mm (2.4 in) |
| 1937 | 65.1 mm (2.6 in) |
| 1938 | 53.9 mm (2.1 in) |
| 1939 | 47.4 mm (1.9 in) |
| 1940 | 47.8 mm (1.9 in) |
| 1941 | 66.3 mm (2.6 in) |
| 1942 | 87.3 mm (3.4 in) |
| 1943 | 80.3 mm (3.2 in) |
| 1944 | 64.3 mm (2.5 in) |
| 1945 | 87.9 mm (3.5 in) |
| 1946 | 48.6 mm (1.9 in) |
| 1947 | 73.7 mm (2.9 in) |
| 1948 | 44.5 mm (1.8 in) |
| 1949 | 61.5 mm (2.4 in) |
| 1950 | 115.8 mm (4.6 in) |
| 1951 | 51.5 mm (2.0 in) |
| 1952 | 69.4 mm (2.7 in) |
| 1953 | 52.9 mm (2.1 in) |
| 1954 | 84.0 mm (3.3 in) |
| 1955 | 81.5 mm (3.2 in) |
| 1956 | 67.3 mm (2.6 in) |
| 1957 | 62.7 mm (2.5 in) |
| 1958 | 123.2 mm (4.9 in) |
| 1959 | 94.0 mm (3.7 in) |
| 1960 | 59.9 mm (2.4 in) |
| 1961 | 69.8 mm (2.7 in) |
| 1962 | 55.1 mm (2.2 in) |
| 1963 | 128.1 mm (5.0 in) |
| 1964 | 69.3 mm (2.7 in) |
| 1965 | 74.4 mm (2.9 in) |
| 1966 | 98.1 mm (3.9 in) |
| 1967 | 85.1 mm (3.4 in) |
| 1968 | 66.8 mm (2.6 in) |
| 1969 | 78.2 mm (3.1 in) |
| 1970 | 63.0 mm (2.5 in) |
| 1971 | 92.7 mm (3.6 in) |
| 1972 | 69.8 mm (2.7 in) |
| 1973 | 93.4 mm (3.7 in) |
| 1974 | 111.5 mm (4.4 in) |
| 1975 | 130.3 mm (5.1 in) |
| 1976 | 80.5 mm (3.2 in) |
| 1977 | 67.1 mm (2.6 in) |
| 1978 | 73.2 mm (2.9 in) |
| 1979 | 89.4 mm (3.5 in) |
| 1980 | 70.9 mm (2.8 in) |
| 1981 | 89.6 mm (3.5 in) |
| 1982 | 83.6 mm (3.3 in) |
| 1983 | 59.6 mm (2.3 in) |
| 1984 | 60.2 mm (2.4 in) |
| 1985 | 61.3 mm (2.4 in) |
| 1986 | 72.7 mm (2.9 in) |
| 1987 | 55.9 mm (2.2 in) |
| 1988 | 80.3 mm (3.2 in) |
| 1989 | 52.8 mm (2.1 in) |
| 1990 | 70.4 mm (2.8 in) |
| 1991 | 75.4 mm (3.0 in) |
| 1992 | 103.8 mm (4.1 in) |
| 1993 | 55.4 mm (2.2 in) |
| 1994 | 96.3 mm (3.8 in) |
| 1995 | 87.3 mm (3.4 in) |
| 1996 | 108.3 mm (4.3 in) |
| 1997 | 65.3 mm (2.6 in) |
| 1998 | 111.3 mm (4.4 in) |
| 1999 | 86.9 mm (3.4 in) |
| 2000 | 77.9 mm (3.1 in) |
| 2001 | 70.3 mm (2.8 in) |
| 2002 | 64.3 mm (2.5 in) |
| 2003 | 72.4 mm (2.9 in) |
| 2004 | 86.9 mm (3.4 in) |
| 2005 | 88.5 mm (3.5 in) |
| 2006 | 68.7 mm (2.7 in) |
| 2007 | 69.2 mm (2.7 in) |
| 2008 | 79.5 mm (3.1 in) |
| 2009 | 63.0 mm (2.5 in) |
| 2010 | 112.1 mm (4.4 in) |
| 2011 | 81.8 mm (3.2 in) |
| 2012 | 66.5 mm (2.6 in) |
| 2013 | 74.1 mm (2.9 in) |
| 2014 | 75.1 mm (3.0 in) |
| 2015 | 85.5 mm (3.4 in) |
| 2016 | 99.9 mm (3.9 in) |
| 2017 | 129.2 mm (5.1 in) |
| 2018 | 62.2 mm (2.4 in) |
| 2019 | 79.2 mm (3.1 in) |
| 2020 | 64.3 mm (2.5 in) |
| 2021 | 97.8 mm (3.9 in) |
| 2022 | 112.3 mm (4.4 in) |
| 2023 | 114.8 mm (4.5 in) |
| 2024 | 98.3 mm (3.9 in) |
| 2025 | 69.0 mm (2.7 in) |
| 2026 | 57.5 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1926 | 9 days |
| 1927 | 12 days |
| 1928 | 13 days |
| 1929 | 16 days |
| 1930 | 16 days |
| 1931 | 18 days |
| 1932 | 17 days |
| 1933 | 16 days |
| 1934 | 17 days |
| 1935 | 18 days |
| 1936 | 19 days |
| 1937 | 15 days |
| 1938 | 21 days |
| 1939 | 18 days |
| 1940 | 13 days |
| 1941 | 16 days |
| 1942 | 10 days |
| 1943 | 16 days |
| 1944 | 15 days |
| 1945 | 12 days |
| 1946 | 12 days |
| 1947 | 14 days |
| 1948 | 21 days |
| 1949 | 26 days |
| 1950 | 18 days |
| 1951 | 15 days |
| 1952 | 18 days |
| 1953 | 15 days |
| 1954 | 30 days |
| 1955 | 23 days |
| 1956 | 14 days |
| 1957 | 23 days |
| 1958 | 15 days |
| 1959 | 13 days |
| 1960 | 16 days |
| 1961 | 12 days |
| 1962 | 12 days |
| 1963 | 23 days |
| 1964 | 14 days |
| 1965 | 15 days |
| 1966 | 18 days |
| 1967 | 18 days |
| 1968 | 12 days |
| 1969 | 15 days |
| 1970 | 17 days |
| 1971 | 19 days |
| 1972 | 10 days |
| 1973 | 10 days |
| 1974 | 11 days |
| 1975 | 19 days |
| 1976 | 12 days |
| 1977 | 16 days |
| 1978 | 17 days |
| 1979 | 10 days |
| 1980 | 17 days |
| 1981 | 22 days |
| 1982 | 16 days |
| 1983 | 21 days |
| 1984 | 10 days |
| 1985 | 13 days |
| 1986 | 10 days |
| 1987 | 21 days |
| 1988 | 14 days |
| 1989 | 11 days |
| 1990 | 12 days |
| 1991 | 13 days |
| 1992 | 15 days |
| 1993 | 10 days |
| 1994 | 11 days |
| 1995 | 22 days |
| 1996 | 12 days |
| 1997 | 16 days |
| 1998 | 13 days |
| 1999 | 19 days |
| 2000 | 12 days |
| 2001 | 16 days |
| 2002 | 22 days |
| 2003 | 13 days |
| 2004 | 13 days |
| 2005 | 18 days |
| 2006 | 11 days |
| 2007 | 13 days |
| 2008 | 13 days |
| 2009 | 14 days |
| 2010 | 17 days |
| 2011 | 14 days |
| 2012 | 13 days |
| 2013 | 12 days |
| 2014 | 12 days |
| 2015 | 17 days |
| 2016 | 14 days |
| 2017 | 19 days |
| 2018 | 12 days |
| 2019 | 14 days |
| 2020 | 15 days |
| 2021 | 28 days |
| 2022 | 11 days |
| 2023 | 18 days |
| 2024 | 12 days |
| 2025 | 19 days |
| 2026 | 16 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
97 years with a frostAcross 97 years with a frost, the median last spring frost at Oswego falls on 24 April and the median first autumn frost on 23 October, which leaves a median of 183 days between them.
In 1994 to 2025 the median growing season was 190 days. That is 3 days more than in 1926 to 1955.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1926 to 1955) | Recent period (1994 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 April | 18 April | 23 April | 5 days later | 0.0 days per decade |
| First autumn frost | 23 October | 26 October | 30 October | 4 days later | +0.4 days per decade |
| Growing days | 183 days | 187 days | 190 days | 3 days more | +0.3 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
99 years, 1926 to 2025A day with at least 47.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 101.8 mm (4.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 47.0 mm (1.9 in) | |
| 5 years | 61.4 mm (2.4 in) | |
| 10 years | 71.1 mm (2.8 in) | |
| 25 years | 83.4 mm (3.3 in) | |
| 50 years | 92.6 mm (3.6 in) | |
| 100 years | 101.8 mm (4.0 in) | Longer than the 99 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, 99 years of values from 1926 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: 96.5 mm (3.8 in) in 1974; 88.9 mm (3.5 in) in 2010; 86.6 mm (3.4 in) in 2005.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Oswego, at 2010. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2010 ran 0.4 C (0.7 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2010 | +0.4 | +0.7 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2009 to 2025 against 1961 to 1990Over 2009 to 2025, Oswego had a mean temperature of 10.0 C (50.0 F) and 1,085.5 mm (42.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are South Weymouth NAS (United States, 479 km away), Chestnut Hill (United States, 456 km away) and Norwalk Gas Plt (United States, 365 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| South Weymouth NAS | United States | 479 km (298 mi) | 10.0 C (50.0 F) | 1,097.7 mm (43.2 in) | 0.49 |
| Chestnut Hill | United States | 456 km (283 mi) | 9.8 C (49.7 F) | 1,159.0 mm (45.6 in) | 0.51 |
| Norwalk Gas Plt | United States | 365 km (227 mi) | 10.0 C (50.1 F) | 1,104.1 mm (43.5 in) | 0.56 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).