Rockwood 2 Threshold Days by Year (USC00407834)
16 fixed thresholds counted per year at Rockwood 2 (USC00407834): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rockwood 2 Thresholds
- Rockwood 2: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1989 with 66.
- Rockwood 2: days with 25 mm (0.98 in) or more of precipitation in 60 years, most in 1979 with 28.
- Rockwood 2: days with 50 mm (1.97 in) or more of precipitation in 58 years, most in 2019 with 9.
- Rockwood 2: days with a maximum temperature at or above 30 C (86 F) in 46 years, most in 1980 with 110.
- 16 fixed thresholds have at least one qualifying day at Rockwood 2.
Days at or above 30 C (86 F)
46 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1963 | 62 | 65.6 |
| 1964 | 75 | 65.6 |
| 1965 | 68 | 65.6 |
| 1966 | 64 | 65.6 |
| 1967 | 40 | 65.6 |
| 1968 | 81 | 65.6 |
| 1969 | 69 | 65.6 |
| 1970 | 107 | 69.1 |
| 1971 | 73 | 69.1 |
| 1972 | 34 | 69.1 |
| 1973 | 66 | 69.1 |
| 1974 | 46 | 69.1 |
| 1975 | 70 | 69.1 |
| 1976 | 57 | 69.1 |
| 1977 | 89 | 69.1 |
| 1978 | 90 | 69.1 |
| 1979 | 59 | 69.1 |
| 1980 | 110 | 73.2 |
| 1981 | 80 | 73.2 |
| 1983 | 75 | 73.2 |
| 1984 | 71 | 73.2 |
| 1985 | 59 | 73.2 |
| 1986 | 79 | 73.2 |
| 1987 | 77 | 73.2 |
| 1988 | 72 | 73.2 |
| 1989 | 36 | 73.2 |
| 1990 | 62 | 57.6 |
| 1991 | 44 | 57.6 |
| 1992 | 15 | 57.6 |
| 1993 | 70 | 57.6 |
| 1994 | 28 | 57.6 |
| 1995 | 59 | 57.6 |
| 1996 | 50 | 57.6 |
| 1997 | 59 | 57.6 |
| 1998 | 109 | 57.6 |
| 1999 | 80 | 57.6 |
| 2000 | 70 | 73.8 |
| 2003 | 59 | 73.8 |
| 2004 | 57 | 73.8 |
| 2005 | 84 | 73.8 |
| 2006 | 77 | 73.8 |
| 2007 | 110 | 73.8 |
| 2008 | 77 | 73.8 |
| 2009 | 56 | 73.8 |
| 2010 | 100 | 97.5 |
| 2011 | 95 | 97.5 |
| Year | First date | Last date |
|---|---|---|
| 1963 | 1963-04-22 | 1963-10-22 |
| 1964 | 1964-04-21 | 1964-09-21 |
| 1965 | 1965-04-24 | 1965-09-23 |
| 1966 | 1966-05-09 | 1966-09-05 |
| 1967 | 1967-04-05 | 1967-09-21 |
| 1968 | 1968-05-16 | 1968-09-25 |
| 1969 | 1969-05-05 | 1969-09-17 |
| 1970 | 1970-04-24 | 1970-09-27 |
| 1971 | 1971-04-20 | 1971-10-05 |
| 1972 | 1972-04-16 | 1972-09-21 |
| 1973 | 1973-06-04 | 1973-09-26 |
| 1974 | 1974-04-30 | 1974-09-12 |
| 1975 | 1975-05-22 | 1975-09-10 |
| 1976 | 1976-04-20 | 1976-09-10 |
| 1977 | 1977-04-13 | 1977-09-16 |
| 1978 | 1978-04-09 | 1978-09-22 |
| 1979 | 1979-05-11 | 1979-09-13 |
| 1980 | 1980-04-23 | 1980-10-11 |
| 1981 | 1981-04-15 | 1981-10-02 |
| 1983 | 1983-06-14 | 1983-09-20 |
| 1984 | 1984-04-26 | 1984-10-24 |
| 1985 | 1985-04-21 | 1985-09-12 |
| 1986 | 1986-04-26 | 1986-10-05 |
| 1987 | 1987-04-22 | 1987-09-18 |
| 1988 | 1988-04-06 | 1988-09-24 |
| 1989 | 1989-04-26 | 1989-09-11 |
| 1990 | 1990-06-09 | 1990-09-12 |
| 1991 | 1991-05-30 | 1991-09-19 |
| 1992 | 1992-06-08 | 1992-08-27 |
| 1993 | 1993-06-08 | 1993-09-16 |
| 1994 | 1994-06-03 | 1994-09-01 |
| 1995 | 1995-04-11 | 1995-09-09 |
| 1996 | 1996-05-19 | 1996-09-07 |
| 1997 | 1997-05-19 | 1997-09-21 |
| 1998 | 1998-05-14 | 1998-10-06 |
| 1999 | 1999-04-04 | 1999-09-30 |
| 2000 | 2000-05-13 | 2000-09-21 |
| 2003 | 2003-05-09 | 2003-09-03 |
| 2004 | 2004-05-07 | 2004-09-27 |
| 2005 | 2005-05-12 | 2005-09-25 |
| 2006 | 2006-04-15 | 2006-09-01 |
| 2007 | 2007-03-26 | 2007-10-09 |
| 2008 | 2008-06-01 | 2008-09-14 |
| 2009 | 2009-04-25 | 2009-08-27 |
| 2010 | 2010-04-06 | 2010-09-25 |
| 2011 | 2011-04-10 | 2011-09-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 46 | 110 | 1980 | 95 |
| 35 C (95 F): Days | 36 | 32 | 1980 | 8 |
| 40 C (104 F): Days | 1 | 2 | 1980 | 2 |
| 90 F (32.2 C): Days | 46 | 80 | 1980 | 60 |
| 100 F (37.8 C): Days | 7 | 12 | 1980 | 5 |
| 0 C (32 F): Ice days (max | 45 | 17 | 1963 | 6 |
| 0 C (32 F): Frost days (min | 42 | 144 | 1969 | 78 |
| -10 C (14 F): Days with min | 42 | 39 | 1963 | 3 |
| -20 C (-4 F): Days with min | 7 | 2 | 1963 | 2 |
| 20 C (68 F): Tropical nights (min | 40 | 49 | 2005 | 34 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 60 | 66 | 1989 | 32 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 60 | 28 | 1979 | 11 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 58 | 9 | 2019 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 12 | 3 | 1973 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 11 | 2 | 1993 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 1993 | 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 (2026-10-12).