Yellowtail Dam Threshold Days by Year (USC00249240)
18 fixed thresholds counted per year at Yellowtail Dam (USC00249240): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Yellowtail Dam Thresholds
- Yellowtail Dam: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1974 with 19.
- Yellowtail Dam: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 1970 with 166.
- Yellowtail Dam: nights with a minimum temperature at or below -10 C (14 F) in 58 years, most in 1978 with 74.
- Yellowtail Dam: nights with a minimum temperature at or below -20 C (-4 F) in 57 years, most in 1949 with 27.
- 18 fixed thresholds have at least one qualifying day at Yellowtail Dam.
Days at or above 30 C (86 F)
54 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 59 | 59 |
| 1963 | 77 | 66.3 |
| 1964 | 58 | 66.3 |
| 1965 | 47 | 66.3 |
| 1966 | 86 | 66.3 |
| 1967 | 75 | 66.3 |
| 1968 | 51 | 66.3 |
| 1969 | 70 | 66.3 |
| 1970 | 79 | 64.8 |
| 1971 | 74 | 64.8 |
| 1972 | 60 | 64.8 |
| 1973 | 62 | 64.8 |
| 1974 | 64 | 64.8 |
| 1975 | 50 | 64.8 |
| 1976 | 67 | 64.8 |
| 1977 | 57 | 64.8 |
| 1978 | 63 | 64.8 |
| 1979 | 72 | 64.8 |
| 1980 | 70 | 73.5 |
| 1981 | 75 | 73.5 |
| 1982 | 56 | 73.5 |
| 1983 | 76 | 73.5 |
| 1984 | 73 | 73.5 |
| 1985 | 69 | 73.5 |
| 1986 | 67 | 73.5 |
| 1987 | 68 | 73.5 |
| 1988 | 101 | 73.5 |
| 1989 | 80 | 73.5 |
| 1990 | 86 | 65.9 |
| 1991 | 66 | 65.9 |
| 1992 | 71 | 65.9 |
| 1993 | 34 | 65.9 |
| 1994 | 70 | 65.9 |
| 1995 | 67 | 65.9 |
| 1996 | 80 | 65.9 |
| 1997 | 53 | 65.9 |
| 2003 | 77 | 59.9 |
| 2004 | 47 | 59.9 |
| 2005 | 54 | 59.9 |
| 2006 | 71 | 59.9 |
| 2007 | 69 | 59.9 |
| 2008 | 53 | 59.9 |
| 2009 | 48 | 59.9 |
| 2010 | 40 | 59.9 |
| 2011 | 67 | 59.9 |
| 2012 | 83 | 59.9 |
| 2013 | 66 | 59.9 |
| 2014 | 51 | 59.9 |
| 2015 | 56 | 59.9 |
| 2016 | 68 | 59.9 |
| 2017 | 66 | 59.9 |
| 2019 | 42 | 59.9 |
| 2020 | 69 | 71 |
| 2021 | 73 | 71 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-04-29 | 1949-09-25 |
| 1963 | 1963-06-18 | 1963-10-08 |
| 1964 | 1964-05-17 | 1964-10-13 |
| 1965 | 1965-06-12 | 1965-10-09 |
| 1966 | 1966-05-04 | 1966-09-24 |
| 1967 | 1967-05-22 | 1967-09-30 |
| 1968 | 1968-06-02 | 1968-09-13 |
| 1969 | 1969-05-24 | 1969-09-19 |
| 1970 | 1970-05-17 | 1970-10-04 |
| 1971 | 1971-05-27 | 1971-09-13 |
| 1972 | 1972-05-16 | 1972-09-17 |
| 1973 | 1973-05-31 | 1973-09-07 |
| 1974 | 1974-04-25 | 1974-09-27 |
| 1975 | 1975-05-15 | 1975-10-06 |
| 1976 | 1976-05-28 | 1976-10-01 |
| 1977 | 1977-05-11 | 1977-09-15 |
| 1978 | 1978-05-15 | 1978-09-28 |
| 1979 | 1979-05-16 | 1979-10-07 |
| 1980 | 1980-04-20 | 1980-10-08 |
| 1981 | 1981-05-01 | 1981-09-20 |
| 1982 | 1982-06-22 | 1982-09-10 |
| 1983 | 1983-05-25 | 1983-09-27 |
| 1984 | 1984-05-15 | 1984-09-20 |
| 1985 | 1985-05-01 | 1985-09-15 |
| 1986 | 1986-05-03 | 1986-08-31 |
| 1987 | 1987-04-28 | 1987-10-04 |
| 1988 | 1988-05-13 | 1988-10-12 |
| 1989 | 1989-05-18 | 1989-10-01 |
| 1990 | 1990-05-06 | 1990-10-02 |
| 1991 | 1991-06-10 | 1991-10-17 |
| 1992 | 1992-04-29 | 1992-10-04 |
| 1993 | 1993-05-13 | 1993-10-06 |
| 1994 | 1994-05-27 | 1994-09-29 |
| 1995 | 1995-06-06 | 1995-10-12 |
| 1996 | 1996-06-05 | 1996-10-12 |
| 1997 | 1997-05-17 | 1997-10-01 |
| 2003 | 2003-05-25 | 2003-10-09 |
| 2004 | 2004-05-04 | 2004-09-19 |
| 2005 | 2005-06-17 | 2005-10-02 |
| 2006 | 2006-05-18 | 2006-09-13 |
| 2007 | 2007-04-29 | 2007-09-23 |
| 2008 | 2008-05-19 | 2008-09-21 |
| 2009 | 2009-05-20 | 2009-09-27 |
| 2010 | 2010-06-30 | 2010-10-05 |
| 2011 | 2011-06-07 | 2011-10-05 |
| 2012 | 2012-04-24 | 2012-09-16 |
| 2013 | 2013-05-13 | 2013-09-22 |
| 2014 | 2014-05-27 | 2014-09-27 |
| 2015 | 2015-06-09 | 2015-10-12 |
| 2016 | 2016-04-23 | 2016-09-12 |
| 2017 | 2017-05-06 | 2017-09-13 |
| 2019 | 2019-06-05 | 2019-09-17 |
| 2020 | 2020-05-31 | 2020-09-24 |
| 2021 | 2021-05-17 | 2021-10-05 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 54 | 101 | 1988 | 73 |
| 35 C (95 F): Days | 54 | 60 | 1988 | 32 |
| 40 C (104 F): Days | 24 | 8 | 1988 | 3 |
| 90 F (32.2 C): Days | 54 | 82 | 1988 | 52 |
| 100 F (37.8 C): Days | 45 | 34 | 1988 | 11 |
| 0 C (32 F): Ice days (max | 54 | 64 | 1978 | 29 |
| 0 C (32 F): Frost days (min | 58 | 166 | 1970 | 129 |
| -10 C (14 F): Days with min | 58 | 74 | 1978 | 37 |
| -20 C (-4 F): Days with min | 57 | 27 | 1949 | 13 |
| -30 C (-22 F): Days with min | 12 | 7 | 1949 | 2 |
| 20 C (68 F): Tropical nights (min | 55 | 17 | 2003 | 7 |
| 25 C (77 F): Days with min | 10 | 2 | 1995 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 59 | 19 | 1974 | 3 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 55 | 6 | 1964 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 13 | 3 | 1964 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1981 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 29 | 8 | 2014 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 5 | 2 | 2014 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).