Ninety Nine Is Threshold Days by Year (USC00386293)
17 fixed thresholds counted per year at Ninety Nine Is (USC00386293): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ninety Nine Is Thresholds
- Ninety Nine Is: days with 10 mm (0.39 in) or more of precipitation in 79 years, most in 1971 with 55.
- Ninety Nine Is: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1992 with 22.
- Ninety Nine Is: days with 50 mm (1.97 in) or more of precipitation in 73 years, most in 1964 with 7.
- Ninety Nine Is: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 1970 with 115.
- 17 fixed thresholds have at least one qualifying day at Ninety Nine Is.
Days at or above 30 C (86 F)
58 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1961 | 82 | 86.3 |
| 1962 | 97 | 86.3 |
| 1963 | 88 | 86.3 |
| 1964 | 88 | 86.3 |
| 1965 | 102 | 86.3 |
| 1966 | 79 | 86.3 |
| 1967 | 73 | 86.3 |
| 1968 | 88 | 86.3 |
| 1969 | 80 | 86.3 |
| 1970 | 115 | 89 |
| 1971 | 91 | 89 |
| 1972 | 85 | 89 |
| 1973 | 92 | 89 |
| 1974 | 75 | 89 |
| 1975 | 95 | 89 |
| 1976 | 70 | 89 |
| 1977 | 103 | 89 |
| 1978 | 106 | 89 |
| 1979 | 58 | 89 |
| 1980 | 99 | 88.4 |
| 1981 | 97 | 88.4 |
| 1982 | 91 | 88.4 |
| 1983 | 94 | 88.4 |
| 1984 | 94 | 88.4 |
| 1985 | 93 | 88.4 |
| 1986 | 95 | 88.4 |
| 1987 | 78 | 88.4 |
| 1988 | 78 | 88.4 |
| 1989 | 65 | 88.4 |
| 1990 | 75 | 63.1 |
| 1991 | 65 | 63.1 |
| 1992 | 46 | 63.1 |
| 1993 | 89 | 63.1 |
| 1994 | 38 | 63.1 |
| 1995 | 57 | 63.1 |
| 1996 | 37 | 63.1 |
| 1997 | 48 | 63.1 |
| 1998 | 100 | 63.1 |
| 1999 | 76 | 63.1 |
| 2000 | 82 | 77.3 |
| 2001 | 65 | 77.3 |
| 2002 | 97 | 77.3 |
| 2003 | 46 | 77.3 |
| 2004 | 65 | 77.3 |
| 2005 | 81 | 77.3 |
| 2006 | 78 | 77.3 |
| 2007 | 102 | 77.3 |
| 2008 | 82 | 77.3 |
| 2009 | 75 | 77.3 |
| 2010 | 106 | 81.1 |
| 2011 | 97 | 81.1 |
| 2012 | 64 | 81.1 |
| 2013 | 47 | 81.1 |
| 2014 | 79 | 81.1 |
| 2015 | 89 | 81.1 |
| 2017 | 63 | 81.1 |
| 2018 | 90 | 81.1 |
| 2019 | 95 | 81.1 |
| Year | First date | Last date |
|---|---|---|
| 1961 | 1961-04-24 | 1961-11-02 |
| 1962 | 1962-04-30 | 1962-10-13 |
| 1963 | 1963-04-02 | 1963-09-21 |
| 1964 | 1964-04-19 | 1964-09-24 |
| 1965 | 1965-04-09 | 1965-09-23 |
| 1966 | 1966-05-19 | 1966-09-11 |
| 1967 | 1967-03-15 | 1967-10-06 |
| 1968 | 1968-04-19 | 1968-10-02 |
| 1969 | 1969-06-01 | 1969-10-14 |
| 1970 | 1970-04-21 | 1970-10-14 |
| 1971 | 1971-04-18 | 1971-10-05 |
| 1972 | 1972-04-14 | 1972-09-27 |
| 1973 | 1973-05-11 | 1973-10-06 |
| 1974 | 1974-04-28 | 1974-11-02 |
| 1975 | 1975-04-26 | 1975-10-14 |
| 1976 | 1976-04-18 | 1976-09-09 |
| 1977 | 1977-04-11 | 1977-10-02 |
| 1978 | 1978-04-02 | 1978-09-22 |
| 1979 | 1979-05-11 | 1979-09-19 |
| 1980 | 1980-04-23 | 1980-09-24 |
| 1981 | 1981-04-12 | 1981-10-06 |
| 1982 | 1982-05-06 | 1982-10-05 |
| 1983 | 1983-05-11 | 1983-10-04 |
| 1984 | 1984-04-26 | 1984-10-14 |
| 1985 | 1985-04-19 | 1985-10-15 |
| 1986 | 1986-04-07 | 1986-10-05 |
| 1987 | 1987-04-22 | 1987-09-18 |
| 1988 | 1988-04-05 | 1988-09-24 |
| 1989 | 1989-04-26 | 1989-09-15 |
| 1990 | 1990-04-26 | 1990-09-20 |
| 1991 | 1991-05-15 | 1991-09-19 |
| 1992 | 1992-05-03 | 1992-09-08 |
| 1993 | 1993-06-04 | 1993-09-26 |
| 1994 | 1994-04-20 | 1994-09-01 |
| 1995 | 1995-03-23 | 1995-09-01 |
| 1996 | 1996-05-17 | 1996-08-24 |
| 1997 | 1997-06-20 | 1997-09-20 |
| 1998 | 1998-05-16 | 1998-10-01 |
| 1999 | 1999-04-10 | 1999-09-15 |
| 2000 | 2000-05-12 | 2000-09-24 |
| 2001 | 2001-04-08 | 2001-09-23 |
| 2002 | 2002-04-15 | 2002-10-06 |
| 2003 | 2003-05-10 | 2003-09-23 |
| 2004 | 2004-05-07 | 2004-08-30 |
| 2005 | 2005-05-12 | 2005-09-27 |
| 2006 | 2006-04-14 | 2006-10-05 |
| 2007 | 2007-03-25 | 2007-10-09 |
| 2008 | 2008-05-27 | 2008-09-14 |
| 2009 | 2009-04-24 | 2009-09-26 |
| 2010 | 2010-04-03 | 2010-09-26 |
| 2011 | 2011-05-23 | 2011-09-16 |
| 2012 | 2012-04-03 | 2012-09-09 |
| 2013 | 2013-05-16 | 2013-10-06 |
| 2014 | 2014-05-06 | 2014-09-13 |
| 2015 | 2015-04-10 | 2015-09-21 |
| 2017 | 2017-05-11 | 2017-10-12 |
| 2018 | 2018-05-11 | 2018-10-09 |
| 2019 | 2019-05-19 | 2019-10-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 58 | 115 | 1970 | 95 |
| 35 C (95 F): Days | 47 | 34 | 1983 | 2 |
| 40 C (104 F): Days | 2 | 2 | 1983 | 1 |
| 90 F (32.2 C): Days | 58 | 77 | 1970 | 54 |
| 100 F (37.8 C): Days | 15 | 10 | 1983 | 3 |
| 0 C (32 F): Ice days (max | 36 | 4 | 1970 | 4 |
| 0 C (32 F): Frost days (min | 58 | 120 | 1968 | 82 |
| -10 C (14 F): Days with min | 55 | 30 | 1977 | 11 |
| -20 C (-4 F): Days with min | 2 | 1 | 1962 | 1 |
| 20 C (68 F): Tropical nights (min | 58 | 60 | 2010 | 28 |
| 25 C (77 F): Days with min | 1 | 1 | 2007 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 79 | 55 | 1971 | 25 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 79 | 22 | 1992 | 8 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 73 | 7 | 1964 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 17 | 2 | 1964 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 9 | 3 | 1969 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 1 | 1971 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.
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).