Mamakan Threshold Days by Year (RSM00030252)
14 fixed thresholds counted per year at Mamakan (RSM00030252): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Mamakan Thresholds
- Mamakan: nights with a minimum temperature at or below 0 C (32 F) in 61 years, most in 1987 with 247.
- Mamakan: nights with a minimum temperature at or below -10 C (14 F) in 61 years, most in 2006 with 178.
- Mamakan: nights with a minimum temperature at or below -20 C (-4 F) in 61 years, most in 1972 with 145.
- Mamakan: nights with a minimum temperature at or below -30 C (-22 F) in 61 years, most in 1966 with 93.
- 14 fixed thresholds have at least one qualifying day at Mamakan.
Days at or above 30 C (86 F)
57 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1960 | 8 | 10.3 |
| 1962 | 12 | 10.3 |
| 1964 | 5 | 10.3 |
| 1965 | 3 | 10.3 |
| 1966 | 4 | 10.3 |
| 1967 | 12 | 10.3 |
| 1968 | 18 | 10.3 |
| 1969 | 20 | 10.3 |
| 1970 | 18 | 10.9 |
| 1971 | 12 | 10.9 |
| 1972 | 4 | 10.9 |
| 1973 | 6 | 10.9 |
| 1974 | 9 | 10.9 |
| 1975 | 17 | 10.9 |
| 1976 | 11 | 10.9 |
| 1977 | 7 | 10.9 |
| 1978 | 9 | 10.9 |
| 1979 | 16 | 10.9 |
| 1980 | 11 | 11 |
| 1981 | 4 | 11 |
| 1982 | 6 | 11 |
| 1984 | 15 | 11 |
| 1985 | 16 | 11 |
| 1986 | 27 | 11 |
| 1987 | 7 | 11 |
| 1988 | 8 | 11 |
| 1989 | 5 | 11 |
| 1990 | 17 | 18.5 |
| 1991 | 30 | 18.5 |
| 1992 | 11 | 18.5 |
| 1993 | 22 | 18.5 |
| 1994 | 14 | 18.5 |
| 1995 | 18 | 18.5 |
| 1996 | 28 | 18.5 |
| 1997 | 9 | 18.5 |
| 1998 | 21 | 18.5 |
| 1999 | 15 | 18.5 |
| 2000 | 10 | 17.9 |
| 2001 | 31 | 17.9 |
| 2002 | 17 | 17.9 |
| 2003 | 25 | 17.9 |
| 2004 | 12 | 17.9 |
| 2005 | 13 | 17.9 |
| 2006 | 25 | 17.9 |
| 2007 | 17 | 17.9 |
| 2008 | 20 | 17.9 |
| 2009 | 9 | 17.9 |
| 2010 | 18 | 14 |
| 2011 | 11 | 14 |
| 2012 | 2 | 14 |
| 2013 | 8 | 14 |
| 2014 | 22 | 14 |
| 2015 | 25 | 14 |
| 2016 | 6 | 14 |
| 2017 | 25 | 14 |
| 2018 | 9 | 14 |
| 2025 | 14 | 14 |
| Year | First date | Last date |
|---|---|---|
| 1960 | 1960-06-09 | 1960-08-01 |
| 1962 | 1962-06-20 | 1962-08-05 |
| 1964 | 1964-07-15 | 1964-07-30 |
| 1965 | 1965-06-08 | 1965-07-31 |
| 1966 | 1966-06-25 | 1966-08-08 |
| 1967 | 1967-06-13 | 1967-07-28 |
| 1968 | 1968-05-26 | 1968-07-29 |
| 1969 | 1969-06-17 | 1969-08-04 |
| 1970 | 1970-06-22 | 1970-07-22 |
| 1971 | 1971-06-04 | 1971-07-18 |
| 1972 | 1972-06-23 | 1972-07-23 |
| 1973 | 1973-06-03 | 1973-08-03 |
| 1974 | 1974-06-27 | 1974-08-06 |
| 1975 | 1975-05-24 | 1975-08-06 |
| 1976 | 1976-06-11 | 1976-07-18 |
| 1977 | 1977-06-24 | 1977-07-13 |
| 1978 | 1978-06-28 | 1978-08-01 |
| 1979 | 1979-06-16 | 1979-08-04 |
| 1980 | 1980-06-18 | 1980-08-10 |
| 1981 | 1981-05-19 | 1981-06-12 |
| 1982 | 1982-06-09 | 1982-07-27 |
| 1984 | 1984-06-15 | 1984-08-21 |
| 1985 | 1985-06-13 | 1985-07-16 |
| 1986 | 1986-06-16 | 1986-08-07 |
| 1987 | 1987-06-08 | 1987-08-15 |
| 1988 | 1988-06-01 | 1988-08-08 |
| 1989 | 1989-05-28 | 1989-08-08 |
| 1990 | 1990-05-16 | 1990-08-01 |
| 1991 | 1991-06-12 | 1991-08-19 |
| 1992 | 1992-05-21 | 1992-08-18 |
| 1993 | 1993-06-27 | 1993-08-07 |
| 1994 | 1994-06-13 | 1994-07-16 |
| 1995 | 1995-06-09 | 1995-08-05 |
| 1996 | 1996-06-14 | 1996-08-13 |
| 1997 | 1997-06-18 | 1997-08-12 |
| 1998 | 1998-06-12 | 1998-08-24 |
| 1999 | 1999-05-25 | 1999-07-28 |
| 2000 | 2000-06-02 | 2000-08-13 |
| 2001 | 2001-06-02 | 2001-08-28 |
| 2002 | 2002-06-14 | 2002-08-14 |
| 2003 | 2003-06-01 | 2003-08-05 |
| 2004 | 2004-06-29 | 2004-07-15 |
| 2005 | 2005-06-12 | 2005-08-06 |
| 2006 | 2006-06-17 | 2006-08-04 |
| 2007 | 2007-06-06 | 2007-08-13 |
| 2008 | 2008-06-10 | 2008-07-26 |
| 2009 | 2009-06-12 | 2009-07-25 |
| 2010 | 2010-06-01 | 2010-08-12 |
| 2011 | 2011-06-12 | 2011-08-07 |
| 2012 | 2012-07-05 | 2012-07-29 |
| 2013 | 2013-06-11 | 2013-08-01 |
| 2014 | 2014-06-10 | 2014-07-25 |
| 2015 | 2015-06-11 | 2015-08-25 |
| 2016 | 2016-06-02 | 2016-07-28 |
| 2017 | 2017-06-11 | 2017-08-14 |
| 2018 | 2018-05-29 | 2018-08-14 |
| 2025 | 2025-05-25 | 2025-08-05 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 57 | 31 | 2001 | 14 |
| 35 C (95 F): Days | 24 | 11 | 1986 | 1 |
| 90 F (32.2 C): Days | 51 | 20 | 1986 | 6 |
| 100 F (37.8 C): Days | 2 | 2 | 1986 | 2 |
| 0 C (32 F): Ice days (max | 58 | 179 | 1984 | 62 |
| 0 C (32 F): Frost days (min | 61 | 247 | 1987 | 83 |
| -10 C (14 F): Days with min | 61 | 178 | 2006 | 56 |
| -20 C (-4 F): Days with min | 61 | 145 | 1972 | 44 |
| -30 C (-22 F): Days with min | 61 | 93 | 1966 | 21 |
| -40 C (-40 F): Days with min | 60 | 47 | 1969 | 5 |
| 20 C (68 F): Tropical nights (min | 3 | 1 | 1968 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 61 | 15 | 2009 | 5 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 37 | 4 | 1979 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 1 | 1979 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.
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).