Serpentine Main Dam Threshold Days by Year
4 fixed thresholds counted per year at Serpentine Main Dam (ASN00009115): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Serpentine Main Dam Thresholds
- Serpentine Main Dam: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1973 with 56.
- Serpentine Main Dam: days with 25 mm (0.98 in) or more of precipitation in 51 years, most in 1974 with 21.
- Serpentine Main Dam: days with 50 mm (1.97 in) or more of precipitation in 36 years, most in 1981 with 4.
- Serpentine Main Dam: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1964 with 1.
- 4 fixed thresholds have at least one qualifying day at Serpentine Main Dam.
Days with 10 mm (0.39 in) or more of precipitation
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1963 | 48 | 41.9 |
| 1964 | 55 | 41.9 |
| 1965 | 42 | 41.9 |
| 1966 | 37 | 41.9 |
| 1967 | 35 | 41.9 |
| 1968 | 48 | 41.9 |
| 1969 | 28 | 41.9 |
| 1970 | 44 | 40.3 |
| 1971 | 40 | 40.3 |
| 1972 | 34 | 40.3 |
| 1973 | 56 | 40.3 |
| 1974 | 53 | 40.3 |
| 1977 | 29 | 40.3 |
| 1978 | 35 | 40.3 |
| 1979 | 31 | 40.3 |
| 1980 | 38 | 37.1 |
| 1981 | 40 | 37.1 |
| 1982 | 33 | 37.1 |
| 1983 | 36 | 37.1 |
| 1984 | 49 | 37.1 |
| 1985 | 34 | 37.1 |
| 1986 | 35 | 37.1 |
| 1987 | 27 | 37.1 |
| 1988 | 46 | 37.1 |
| 1989 | 33 | 37.1 |
| 1990 | 42 | 39.9 |
| 1991 | 46 | 39.9 |
| 1992 | 50 | 39.9 |
| 1993 | 35 | 39.9 |
| 1994 | 28 | 39.9 |
| 1995 | 41 | 39.9 |
| 1996 | 38 | 39.9 |
| 1997 | 35 | 39.9 |
| 1998 | 42 | 39.9 |
| 1999 | 42 | 39.9 |
| 2000 | 45 | 36.8 |
| 2001 | 27 | 36.8 |
| 2002 | 35 | 36.8 |
| 2003 | 43 | 36.8 |
| 2004 | 33 | 36.8 |
| 2005 | 39 | 36.8 |
| 2006 | 31 | 36.8 |
| 2007 | 43 | 36.8 |
| 2008 | 32 | 36.8 |
| 2009 | 40 | 36.8 |
| 2010 | 20 | 31.8 |
| 2011 | 40 | 31.8 |
| 2012 | 33 | 31.8 |
| 2013 | 43 | 31.8 |
| 2014 | 36 | 31.8 |
| 2015 | 19 | 31.8 |
| Year | First date | Last date |
|---|---|---|
| 1963 | 1963-04-20 | 1963-10-17 |
| 1964 | 1964-04-02 | 1964-12-19 |
| 1965 | 1965-05-01 | 1965-12-07 |
| 1966 | 1966-04-12 | 1966-12-27 |
| 1967 | 1967-04-11 | 1967-11-16 |
| 1968 | 1968-01-07 | 1968-11-17 |
| 1969 | 1969-03-13 | 1969-12-10 |
| 1970 | 1970-02-07 | 1970-11-04 |
| 1971 | 1971-03-28 | 1971-10-20 |
| 1972 | 1972-04-20 | 1972-10-28 |
| 1973 | 1973-04-09 | 1973-10-24 |
| 1974 | 1974-04-04 | 1974-10-30 |
| 1977 | 1977-02-21 | 1977-10-08 |
| 1978 | 1978-02-24 | 1978-11-25 |
| 1979 | 1979-03-15 | 1979-11-13 |
| 1980 | 1980-02-10 | 1980-12-31 |
| 1981 | 1981-02-18 | 1981-11-26 |
| 1982 | 1982-01-21 | 1982-12-12 |
| 1983 | 1983-02-06 | 1983-12-31 |
| 1984 | 1984-03-08 | 1984-12-27 |
| 1985 | 1985-02-10 | 1985-11-09 |
| 1986 | 1986-02-22 | 1986-11-09 |
| 1987 | 1987-03-17 | 1987-12-24 |
| 1988 | 1988-04-28 | 1988-11-07 |
| 1989 | 1989-01-26 | 1989-10-18 |
| 1990 | 1990-01-29 | 1990-11-17 |
| 1991 | 1991-02-25 | 1991-12-25 |
| 1992 | 1992-01-28 | 1992-12-09 |
| 1993 | 1993-02-06 | 1993-11-10 |
| 1994 | 1994-05-21 | 1994-11-27 |
| 1995 | 1995-05-10 | 1995-11-08 |
| 1996 | 1996-04-20 | 1996-12-12 |
| 1997 | 1997-02-20 | 1997-11-22 |
| 1998 | 1998-03-10 | 1998-11-18 |
| 1999 | 1999-01-23 | 1999-12-30 |
| 2000 | 2000-01-07 | 2000-11-27 |
| 2001 | 2001-05-06 | 2001-11-19 |
| 2002 | 2002-04-17 | 2002-11-01 |
| 2003 | 2003-04-11 | 2003-11-19 |
| 2004 | 2004-05-10 | 2004-10-21 |
| 2005 | 2005-03-31 | 2005-11-05 |
| 2006 | 2006-01-13 | 2006-11-29 |
| 2007 | 2007-04-16 | 2007-12-06 |
| 2008 | 2008-04-01 | 2008-11-23 |
| 2009 | 2009-01-19 | 2009-11-18 |
| 2010 | 2010-03-23 | 2010-10-21 |
| 2011 | 2011-01-06 | 2011-12-13 |
| 2012 | 2012-01-20 | 2012-12-12 |
| 2013 | 2013-01-07 | 2013-11-30 |
| 2014 | 2014-03-23 | 2014-11-27 |
| 2015 | 2015-03-15 | 2015-12-05 |
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 | 51 | 56 | 1973 | 19 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 51 | 21 | 1974 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 36 | 4 | 1981 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1964 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.
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 (2025-12-31).