Langley Threshold Days by Year
7 fixed thresholds counted per year at Langley (USC00034060): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Langley Thresholds
- Langley: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1990 with 60.
- Langley: days with 25 mm (0.98 in) or more of precipitation in 60 years, most in 1990 with 38.
- Langley: days with 50 mm (1.97 in) or more of precipitation in 60 years, most in 1957 with 14.
- Langley: days with 100 mm (3.94 in) or more of precipitation in 33 years, most in 1955 with 3.
- 7 fixed thresholds have at least one qualifying day at Langley.
Days with 10 mm (0.39 in) or more of precipitation
60 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1951 | 51 | 44.2 |
| 1952 | 46 | 44.2 |
| 1953 | 36 | 44.2 |
| 1954 | 37 | 44.2 |
| 1955 | 41 | 44.2 |
| 1956 | 38 | 44.2 |
| 1957 | 58 | 44.2 |
| 1958 | 43 | 44.2 |
| 1959 | 48 | 44.2 |
| 1960 | 45 | 42.2 |
| 1961 | 44 | 42.2 |
| 1962 | 52 | 42.2 |
| 1963 | 31 | 42.2 |
| 1964 | 36 | 42.2 |
| 1965 | 37 | 42.2 |
| 1966 | 33 | 42.2 |
| 1967 | 43 | 42.2 |
| 1968 | 57 | 42.2 |
| 1969 | 44 | 42.2 |
| 1970 | 43 | 44.4 |
| 1971 | 48 | 44.4 |
| 1972 | 44 | 44.4 |
| 1973 | 59 | 44.4 |
| 1975 | 42 | 44.4 |
| 1976 | 37 | 44.4 |
| 1977 | 39 | 44.4 |
| 1978 | 43 | 44.4 |
| 1982 | 45 | 43.5 |
| 1984 | 45 | 43.5 |
| 1986 | 44 | 43.5 |
| 1989 | 40 | 43.5 |
| 1990 | 60 | 45.3 |
| 1991 | 54 | 45.3 |
| 1992 | 47 | 45.3 |
| 1993 | 45 | 45.3 |
| 1994 | 50 | 45.3 |
| 1995 | 31 | 45.3 |
| 1996 | 51 | 45.3 |
| 1997 | 44 | 45.3 |
| 1998 | 39 | 45.3 |
| 1999 | 32 | 45.3 |
| 2000 | 36 | 26.8 |
| 2001 | 23 | 26.8 |
| 2002 | 23 | 26.8 |
| 2004 | 31 | 26.8 |
| 2005 | 21 | 26.8 |
| 2010 | 29 | 41.6 |
| 2011 | 35 | 41.6 |
| 2012 | 31 | 41.6 |
| 2014 | 45 | 41.6 |
| 2017 | 42 | 41.6 |
| 2018 | 58 | 41.6 |
| 2019 | 51 | 41.6 |
| 2020 | 55 | 37 |
| 2021 | 42 | 37 |
| 2022 | 37 | 37 |
| 2023 | 44 | 37 |
| 2024 | 35 | 37 |
| 2025 | 28 | 37 |
| 2026 | 18 | 37 |
| Year | First date | Last date |
|---|---|---|
| 1951 | 1951-01-03 | 1951-12-09 |
| 1952 | 1952-01-02 | 1952-12-31 |
| 1953 | 1953-01-17 | 1953-12-28 |
| 1954 | 1954-01-10 | 1954-12-28 |
| 1955 | 1955-01-10 | 1955-12-02 |
| 1956 | 1956-01-18 | 1956-12-20 |
| 1957 | 1957-01-04 | 1957-12-25 |
| 1958 | 1958-01-13 | 1958-11-28 |
| 1959 | 1959-01-15 | 1959-12-27 |
| 1960 | 1960-01-05 | 1960-12-11 |
| 1961 | 1961-01-15 | 1961-12-17 |
| 1962 | 1962-01-04 | 1962-12-29 |
| 1963 | 1963-01-05 | 1963-12-11 |
| 1964 | 1964-01-31 | 1964-12-10 |
| 1965 | 1965-01-09 | 1965-12-24 |
| 1966 | 1966-01-02 | 1966-12-28 |
| 1967 | 1967-01-26 | 1967-12-22 |
| 1968 | 1968-01-03 | 1968-12-28 |
| 1969 | 1969-01-16 | 1969-12-30 |
| 1970 | 1970-01-06 | 1970-12-22 |
| 1971 | 1971-01-03 | 1971-12-30 |
| 1972 | 1972-01-04 | 1972-12-30 |
| 1973 | 1973-01-03 | 1973-12-24 |
| 1975 | 1975-01-03 | 1975-12-29 |
| 1976 | 1976-01-25 | 1976-12-11 |
| 1977 | 1977-01-09 | 1977-12-14 |
| 1978 | 1978-01-12 | 1978-12-31 |
| 1982 | 1982-01-03 | 1982-12-27 |
| 1984 | 1984-01-10 | 1984-12-30 |
| 1986 | 1986-01-17 | 1986-12-18 |
| 1989 | 1989-01-06 | 1989-12-29 |
| 1990 | 1990-01-04 | 1990-12-30 |
| 1991 | 1991-01-06 | 1991-12-21 |
| 1992 | 1992-01-14 | 1992-12-29 |
| 1993 | 1993-01-04 | 1993-12-09 |
| 1994 | 1994-01-16 | 1994-12-29 |
| 1995 | 1995-01-06 | 1995-12-31 |
| 1996 | 1996-01-18 | 1996-12-23 |
| 1997 | 1997-01-22 | 1997-12-24 |
| 1998 | 1998-01-04 | 1998-12-21 |
| 1999 | 1999-01-01 | 1999-12-12 |
| 2000 | 2000-01-27 | 2000-11-24 |
| 2001 | 2001-01-16 | 2001-12-09 |
| 2002 | 2002-03-19 | 2002-12-23 |
| 2004 | 2004-01-16 | 2004-12-31 |
| 2005 | 2005-01-01 | 2005-12-08 |
| 2010 | 2010-02-05 | 2010-12-30 |
| 2011 | 2011-02-01 | 2011-12-20 |
| 2012 | 2012-01-11 | 2012-12-26 |
| 2014 | 2014-01-09 | 2014-12-28 |
| 2017 | 2017-01-18 | 2017-12-23 |
| 2018 | 2018-01-08 | 2018-12-31 |
| 2019 | 2019-01-03 | 2019-12-29 |
| 2020 | 2020-01-11 | 2020-12-31 |
| 2021 | 2021-01-01 | 2021-12-29 |
| 2022 | 2022-01-08 | 2022-12-30 |
| 2023 | 2023-01-02 | 2023-12-09 |
| 2024 | 2024-01-06 | 2024-12-28 |
| 2025 | 2025-01-30 | 2025-11-24 |
| 2026 | 2026-02-14 | 2026-07-29 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 10 mm (0.39 in): Days with 10 mm or more rain | 60 | 60 | 1990 | 18 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 60 | 38 | 1990 | 15 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 60 | 14 | 1957 | 4 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 33 | 3 | 1955 | 3 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 4 | 1 | 1952 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 14 | 2 | 1985 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 1 | 2000 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.
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 (2026-10-12).