Lees Ferry Threshold Days by Year
16 fixed thresholds counted per year at Lees Ferry (USC00024849): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Lees Ferry Thresholds
- Lees Ferry: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 2004 with 11.
- Lees Ferry: nights with a minimum temperature at or below 0 C (32 F) in 66 years, most in 1933 with 109.
- Lees Ferry: nights with a minimum temperature at or above 20 C (68 F) in 66 years, most in 2007 with 95.
- Lees Ferry: nights with a minimum temperature at or above 25 C (77 F) in 64 years, most in 2002 with 30.
- 16 fixed thresholds have at least one qualifying day at Lees Ferry.
Days at or above 30 C (86 F)
59 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1922 | 143 | 136.9 |
| 1923 | 124 | 136.9 |
| 1924 | 133 | 136.9 |
| 1926 | 131 | 136.9 |
| 1927 | 131 | 136.9 |
| 1928 | 152 | 136.9 |
| 1929 | 144 | 136.9 |
| 1930 | 136 | 145.1 |
| 1931 | 138 | 145.1 |
| 1932 | 139 | 145.1 |
| 1933 | 142 | 145.1 |
| 1934 | 171 | 145.1 |
| 1935 | 137 | 145.1 |
| 1936 | 153 | 145.1 |
| 1945 | 139 | 144.6 |
| 1946 | 141 | 144.6 |
| 1947 | 138 | 144.6 |
| 1948 | 157 | 144.6 |
| 1949 | 148 | 144.6 |
| 1950 | 164 | 146.1 |
| 1951 | 139 | 146.1 |
| 1952 | 156 | 146.1 |
| 1953 | 140 | 146.1 |
| 1954 | 153 | 146.1 |
| 1956 | 146 | 146.1 |
| 1957 | 126 | 146.1 |
| 1958 | 145 | 146.1 |
| 1963 | 152 | 143 |
| 1966 | 154 | 143 |
| 1967 | 129 | 143 |
| 1968 | 127 | 143 |
| 1969 | 153 | 143 |
| 1970 | 140 | 143.4 |
| 1971 | 144 | 143.4 |
| 1972 | 141 | 143.4 |
| 1973 | 139 | 143.4 |
| 1974 | 148 | 143.4 |
| 1975 | 134 | 143.4 |
| 1976 | 136 | 143.4 |
| 1977 | 149 | 143.4 |
| 1978 | 147 | 143.4 |
| 1979 | 156 | 143.4 |
| 1980 | 138 | 134.6 |
| 1982 | 130 | 134.6 |
| 1985 | 132 | 134.6 |
| 1986 | 130 | 134.6 |
| 1988 | 143 | 134.6 |
| 1994 | 145 | 145.5 |
| 1999 | 146 | 145.5 |
| 2000 | 154 | 147.1 |
| 2001 | 161 | 147.1 |
| 2002 | 152 | 147.1 |
| 2003 | 151 | 147.1 |
| 2004 | 154 | 147.1 |
| 2006 | 129 | 147.1 |
| 2007 | 138 | 147.1 |
| 2008 | 138 | 147.1 |
| 2010 | 130 | 130.5 |
| 2011 | 131 | 130.5 |
| Year | First date | Last date |
|---|---|---|
| 1922 | 1922-05-05 | 1922-10-12 |
| 1923 | 1923-05-03 | 1923-10-06 |
| 1924 | 1924-04-23 | 1924-10-02 |
| 1926 | 1926-04-26 | 1926-10-08 |
| 1927 | 1927-04-23 | 1927-10-29 |
| 1928 | 1928-03-23 | 1928-10-11 |
| 1929 | 1929-05-04 | 1929-10-10 |
| 1930 | 1930-04-07 | 1930-10-09 |
| 1931 | 1931-04-13 | 1931-10-11 |
| 1932 | 1932-04-03 | 1932-10-15 |
| 1933 | 1933-04-04 | 1933-10-27 |
| 1934 | 1934-03-29 | 1934-10-15 |
| 1935 | 1935-04-15 | 1935-10-12 |
| 1936 | 1936-04-13 | 1936-10-14 |
| 1945 | 1945-04-20 | 1945-10-11 |
| 1946 | 1946-04-14 | 1946-09-30 |
| 1947 | 1947-04-14 | 1947-10-09 |
| 1948 | 1948-04-15 | 1948-10-16 |
| 1949 | 1949-04-12 | 1949-10-16 |
| 1950 | 1950-04-01 | 1950-10-30 |
| 1951 | 1951-04-09 | 1951-10-17 |
| 1952 | 1952-04-06 | 1952-10-20 |
| 1953 | 1953-03-27 | 1953-10-18 |
| 1954 | 1954-04-10 | 1954-10-13 |
| 1956 | 1956-04-22 | 1956-10-11 |
| 1957 | 1957-05-01 | 1957-10-10 |
| 1958 | 1958-04-17 | 1958-10-19 |
| 1963 | 1963-04-07 | 1963-10-11 |
| 1966 | 1966-04-02 | 1966-10-02 |
| 1967 | 1967-05-08 | 1967-10-21 |
| 1968 | 1968-05-01 | 1968-10-14 |
| 1969 | 1969-04-20 | 1969-10-03 |
| 1970 | 1970-05-04 | 1970-10-13 |
| 1971 | 1971-03-26 | 1971-10-15 |
| 1972 | 1972-03-18 | 1972-09-29 |
| 1973 | 1973-04-28 | 1973-10-23 |
| 1974 | 1974-03-30 | 1974-10-03 |
| 1975 | 1975-05-09 | 1975-10-12 |
| 1976 | 1976-04-25 | 1976-09-30 |
| 1977 | 1977-04-08 | 1977-10-06 |
| 1978 | 1978-04-20 | 1978-10-11 |
| 1979 | 1979-04-15 | 1979-10-14 |
| 1980 | 1980-04-15 | 1980-10-10 |
| 1982 | 1982-04-28 | 1982-09-28 |
| 1985 | 1985-04-08 | 1985-10-03 |
| 1986 | 1986-04-11 | 1986-09-21 |
| 1988 | 1988-03-26 | 1988-10-26 |
| 1994 | 1994-04-17 | 1994-10-05 |
| 1999 | 1999-04-18 | 1999-10-15 |
| 2000 | 2000-04-14 | 2000-10-07 |
| 2001 | 2001-04-02 | 2001-10-24 |
| 2002 | 2002-04-02 | 2002-10-11 |
| 2003 | 2003-04-11 | 2003-10-30 |
| 2004 | 2004-03-20 | 2004-10-15 |
| 2006 | 2006-04-22 | 2006-10-04 |
| 2007 | 2007-04-05 | 2007-09-28 |
| 2008 | 2008-04-14 | 2008-10-09 |
| 2010 | 2010-04-18 | 2010-10-03 |
| 2011 | 2011-04-17 | 2011-10-16 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 59 | 171 | 1934 | 131 |
| 35 C (95 F): Days | 59 | 121 | 2000 | 84 |
| 40 C (104 F): Days | 59 | 63 | 2002 | 26 |
| 45 C (113 F): Days | 13 | 8 | 1994 | 7 |
| 90 F (32.2 C): Days | 59 | 147 | 1934 | 112 |
| 100 F (37.8 C): Days | 59 | 96 | 2000 | 60 |
| 110 F (43.3 C): Days | 49 | 34 | 2002 | 1 |
| 0 C (32 F): Ice days (max | 27 | 8 | 1932 | 2 |
| 0 C (32 F): Frost days (min | 66 | 109 | 1933 | 69 |
| -10 C (14 F): Days with min | 25 | 16 | 1933 | 1 |
| 20 C (68 F): Tropical nights (min | 66 | 95 | 2007 | 79 |
| 25 C (77 F): Days with min | 64 | 30 | 2002 | 22 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 69 | 11 | 2004 | 7 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 22 | 3 | 2000 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1934 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 9 | 2 | 1967 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.
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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).