Swansea Post Office Threshold Days by Year (ASN00092038)
11 fixed thresholds counted per year at Swansea Post Office (ASN00092038): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Swansea Post Office Thresholds
- Swansea Post Office: days with 10 mm (0.39 in) or more of precipitation in 101 years, most in 1956 with 29.
- Swansea Post Office: days with 25 mm (0.98 in) or more of precipitation in 98 years, most in 1934 with 9.
- Swansea Post Office: days with 50 mm (1.97 in) or more of precipitation in 54 years, most in 1960 with 5.
- Swansea Post Office: days with a maximum temperature at or above 30 C (86 F) in 48 years, most in 2009 with 12.
- 11 fixed thresholds have at least one qualifying day at Swansea Post Office.
Days at or above 30 C (86 F)
48 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1957 | 6 | 4 |
| 1958 | 3 | 4 |
| 1959 | 3 | 4 |
| 1960 | 6 | 3.3 |
| 1961 | 5 | 3.3 |
| 1962 | 2 | 3.3 |
| 1963 | 4 | 3.3 |
| 1964 | 1 | 3.3 |
| 1965 | 5 | 3.3 |
| 1966 | 2 | 3.3 |
| 1967 | 1 | 3.3 |
| 1974 | 3 | 3.8 |
| 1975 | 2 | 3.8 |
| 1976 | 4 | 3.8 |
| 1977 | 1 | 3.8 |
| 1978 | 7 | 3.8 |
| 1979 | 6 | 3.8 |
| 1980 | 7 | 5.4 |
| 1981 | 6 | 5.4 |
| 1982 | 10 | 5.4 |
| 1983 | 4 | 5.4 |
| 1984 | 3 | 5.4 |
| 1985 | 2 | 5.4 |
| 1986 | 2 | 5.4 |
| 1987 | 7 | 5.4 |
| 1988 | 9 | 5.4 |
| 1989 | 4 | 5.4 |
| 1990 | 5 | 5.3 |
| 1991 | 7 | 5.3 |
| 1992 | 4 | 5.3 |
| 1993 | 5 | 5.3 |
| 1994 | 7 | 5.3 |
| 1995 | 2 | 5.3 |
| 1996 | 3 | 5.3 |
| 1997 | 9 | 5.3 |
| 1998 | 8 | 5.3 |
| 1999 | 3 | 5.3 |
| 2000 | 8 | 6.9 |
| 2001 | 9 | 6.9 |
| 2002 | 3 | 6.9 |
| 2003 | 9 | 6.9 |
| 2004 | 1 | 6.9 |
| 2005 | 5 | 6.9 |
| 2006 | 7 | 6.9 |
| 2007 | 9 | 6.9 |
| 2008 | 6 | 6.9 |
| 2009 | 12 | 6.9 |
| 2010 | 4 | 4 |
| Year | First date | Last date |
|---|---|---|
| 1957 | 1957-01-12 | 1957-12-28 |
| 1958 | 1958-02-24 | 1958-11-28 |
| 1959 | 1959-01-17 | 1959-11-21 |
| 1960 | 1960-01-07 | 1960-12-30 |
| 1961 | 1961-01-09 | 1961-12-28 |
| 1962 | 1962-12-01 | 1962-12-23 |
| 1963 | 1963-01-21 | 1963-02-28 |
| 1964 | 1964-01-06 | 1964-01-06 |
| 1965 | 1965-02-16 | 1965-11-20 |
| 1966 | 1966-11-23 | 1966-12-25 |
| 1967 | 1967-03-17 | 1967-03-17 |
| 1974 | 1974-01-31 | 1974-03-03 |
| 1975 | 1975-02-08 | 1975-12-12 |
| 1976 | 1976-01-04 | 1976-12-22 |
| 1977 | 1977-10-27 | 1977-10-27 |
| 1978 | 1978-01-01 | 1978-11-26 |
| 1979 | 1979-01-24 | 1979-12-15 |
| 1980 | 1980-02-01 | 1980-12-11 |
| 1981 | 1981-01-01 | 1981-12-11 |
| 1982 | 1982-01-10 | 1982-11-24 |
| 1983 | 1983-02-01 | 1983-12-20 |
| 1984 | 1984-01-02 | 1984-02-27 |
| 1985 | 1985-01-14 | 1985-02-03 |
| 1986 | 1986-02-08 | 1986-03-07 |
| 1987 | 1987-01-31 | 1987-12-27 |
| 1988 | 1988-01-07 | 1988-11-13 |
| 1989 | 1989-01-28 | 1989-12-19 |
| 1990 | 1990-01-24 | 1990-12-05 |
| 1991 | 1991-01-03 | 1991-12-27 |
| 1992 | 1992-01-20 | 1992-12-31 |
| 1993 | 1993-01-19 | 1993-12-11 |
| 1994 | 1994-01-26 | 1994-12-28 |
| 1995 | 1995-01-04 | 1995-02-25 |
| 1996 | 1996-01-15 | 1996-12-22 |
| 1997 | 1997-01-05 | 1997-11-26 |
| 1998 | 1998-01-12 | 1998-12-12 |
| 1999 | 1999-12-01 | 1999-12-03 |
| 2000 | 2000-01-19 | 2000-12-19 |
| 2001 | 2001-01-02 | 2001-02-21 |
| 2002 | 2002-03-18 | 2002-12-30 |
| 2003 | 2003-01-07 | 2003-12-30 |
| 2004 | 2004-01-20 | 2004-01-20 |
| 2005 | 2005-01-19 | 2005-12-30 |
| 2006 | 2006-01-20 | 2006-12-14 |
| 2007 | 2007-01-05 | 2007-12-29 |
| 2008 | 2008-01-06 | 2008-10-27 |
| 2009 | 2009-01-06 | 2009-12-31 |
| 2010 | 2010-01-08 | 2010-11-23 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 48 | 12 | 2009 | 4 |
| 35 C (95 F): Days | 29 | 4 | 1997 | 2 |
| 40 C (104 F): Days | 1 | 1 | 2003 | 1 |
| 90 F (32.2 C): Days | 46 | 7 | 1982 | 1 |
| 100 F (37.8 C): Days | 9 | 2 | 1997 | 1 |
| 0 C (32 F): Frost days (min | 47 | 42 | 1977 | 28 |
| 20 C (68 F): Tropical nights (min | 9 | 2 | 1981 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 101 | 29 | 1956 | 14 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 98 | 9 | 1934 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 54 | 5 | 1960 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 10 | 2 | 1946 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.
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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-17).