Tucson Magnetic Obsy Threshold Days by Year (USC00028800)
15 fixed thresholds counted per year at Tucson Magnetic Obsy (USC00028800): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Tucson Magnetic Obsy Thresholds
- Tucson Magnetic Obsy: days with a maximum temperature at or above 30 C (86 F) in 62 years, most in 1950 with 205.
- Tucson Magnetic Obsy: days with a maximum temperature at or above 35 C (95 F) in 62 years, most in 1989 with 151.
- Tucson Magnetic Obsy: days with a maximum temperature at or above 40 C (104 F) in 62 years, most in 1980 with 46.
- Tucson Magnetic Obsy: days with a maximum temperature at or above 90 F (32.2 C) in 62 years, most in 1952 with 179.
- 15 fixed thresholds have at least one qualifying day at Tucson Magnetic Obsy.
Days at or above 30 C (86 F)
62 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1912 | 148 | 162 |
| 1913 | 165 | 162 |
| 1914 | 167 | 162 |
| 1915 | 168 | 162 |
| 1935 | 157 | 179.4 |
| 1936 | 183 | 179.4 |
| 1937 | 188 | 179.4 |
| 1938 | 179 | 179.4 |
| 1939 | 190 | 179.4 |
| 1940 | 182 | 174 |
| 1941 | 148 | 174 |
| 1942 | 169 | 174 |
| 1943 | 190 | 174 |
| 1944 | 166 | 174 |
| 1945 | 176 | 174 |
| 1946 | 178 | 174 |
| 1947 | 178 | 174 |
| 1948 | 178 | 174 |
| 1949 | 175 | 174 |
| 1950 | 205 | 181.1 |
| 1951 | 175 | 181.1 |
| 1952 | 190 | 181.1 |
| 1953 | 175 | 181.1 |
| 1954 | 192 | 181.1 |
| 1955 | 176 | 181.1 |
| 1956 | 185 | 181.1 |
| 1957 | 151 | 181.1 |
| 1959 | 181 | 181.1 |
| 1960 | 169 | 176 |
| 1961 | 176 | 176 |
| 1962 | 189 | 176 |
| 1963 | 187 | 176 |
| 1964 | 158 | 176 |
| 1965 | 174 | 176 |
| 1966 | 177 | 176 |
| 1967 | 182 | 176 |
| 1968 | 173 | 176 |
| 1969 | 175 | 176 |
| 1970 | 155 | 174.9 |
| 1971 | 167 | 174.9 |
| 1972 | 189 | 174.9 |
| 1973 | 181 | 174.9 |
| 1974 | 183 | 174.9 |
| 1975 | 175 | 174.9 |
| 1976 | 169 | 174.9 |
| 1977 | 171 | 174.9 |
| 1978 | 176 | 174.9 |
| 1979 | 183 | 174.9 |
| 1980 | 176 | 177.4 |
| 1981 | 189 | 177.4 |
| 1982 | 167 | 177.4 |
| 1983 | 150 | 177.4 |
| 1984 | 166 | 177.4 |
| 1985 | 172 | 177.4 |
| 1986 | 181 | 177.4 |
| 1987 | 180 | 177.4 |
| 1988 | 193 | 177.4 |
| 1989 | 200 | 177.4 |
| 1990 | 188 | 179 |
| 1991 | 170 | 179 |
| 1992 | 182 | 179 |
| 1993 | 176 | 179 |
| Year | First date | Last date |
|---|---|---|
| 1912 | 1912-04-29 | 1912-11-09 |
| 1913 | 1913-03-31 | 1913-11-09 |
| 1914 | 1914-03-17 | 1914-10-17 |
| 1915 | 1915-04-11 | 1915-11-04 |
| 1935 | 1935-04-13 | 1935-10-28 |
| 1936 | 1936-03-20 | 1936-11-16 |
| 1937 | 1937-04-08 | 1937-11-06 |
| 1938 | 1938-03-11 | 1938-10-30 |
| 1939 | 1939-03-15 | 1939-11-04 |
| 1940 | 1940-03-24 | 1940-11-02 |
| 1941 | 1941-04-24 | 1941-10-17 |
| 1942 | 1942-03-31 | 1942-11-07 |
| 1943 | 1943-02-20 | 1943-10-28 |
| 1944 | 1944-04-04 | 1944-11-04 |
| 1945 | 1945-04-07 | 1945-11-28 |
| 1946 | 1946-03-10 | 1946-10-22 |
| 1947 | 1947-03-25 | 1947-11-01 |
| 1948 | 1948-04-09 | 1948-10-16 |
| 1949 | 1949-03-15 | 1949-11-06 |
| 1950 | 1950-01-20 | 1950-11-28 |
| 1951 | 1951-02-10 | 1951-10-24 |
| 1952 | 1952-04-04 | 1952-11-02 |
| 1953 | 1953-01-10 | 1953-11-26 |
| 1954 | 1954-04-07 | 1954-12-03 |
| 1955 | 1955-03-08 | 1955-11-04 |
| 1956 | 1956-03-18 | 1956-11-13 |
| 1957 | 1957-02-14 | 1957-10-11 |
| 1959 | 1959-04-01 | 1959-10-28 |
| 1960 | 1960-03-08 | 1960-11-04 |
| 1961 | 1961-03-24 | 1961-10-26 |
| 1962 | 1962-03-27 | 1962-11-14 |
| 1963 | 1963-02-05 | 1963-11-14 |
| 1964 | 1964-03-31 | 1964-10-30 |
| 1965 | 1965-04-01 | 1965-11-08 |
| 1966 | 1966-03-14 | 1966-11-21 |
| 1967 | 1967-02-14 | 1967-11-16 |
| 1968 | 1968-02-27 | 1968-11-12 |
| 1969 | 1969-03-30 | 1969-10-26 |
| 1970 | 1970-04-07 | 1970-11-01 |
| 1971 | 1971-01-20 | 1971-11-12 |
| 1972 | 1972-03-06 | 1972-10-17 |
| 1973 | 1973-04-27 | 1973-11-13 |
| 1974 | 1974-03-02 | 1974-10-26 |
| 1975 | 1975-03-02 | 1975-11-15 |
| 1976 | 1976-03-23 | 1976-10-21 |
| 1977 | 1977-04-07 | 1977-11-05 |
| 1978 | 1978-03-27 | 1978-10-20 |
| 1979 | 1979-04-14 | 1979-10-28 |
| 1980 | 1980-04-10 | 1980-11-10 |
| 1981 | 1981-02-20 | 1981-11-25 |
| 1982 | 1982-04-12 | 1982-10-27 |
| 1983 | 1983-04-18 | 1983-10-25 |
| 1984 | 1984-03-21 | 1984-11-07 |
| 1985 | 1985-04-03 | 1985-11-05 |
| 1986 | 1986-02-25 | 1986-10-31 |
| 1987 | 1987-04-03 | 1987-10-29 |
| 1988 | 1988-03-21 | 1988-11-08 |
| 1989 | 1989-02-24 | 1989-11-11 |
| 1990 | 1990-03-21 | 1990-11-18 |
| 1991 | 1991-04-06 | 1991-11-09 |
| 1992 | 1992-04-12 | 1992-11-15 |
| 1993 | 1993-04-11 | 1993-11-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 62 | 205 | 1950 | 176 |
| 35 C (95 F): Days | 62 | 151 | 1989 | 115 |
| 40 C (104 F): Days | 62 | 46 | 1980 | 28 |
| 45 C (113 F): Days | 9 | 4 | 1990 | 4 |
| 90 F (32.2 C): Days | 62 | 179 | 1952 | 147 |
| 100 F (37.8 C): Days | 62 | 86 | 1951 | 71 |
| 110 F (43.3 C): Days | 36 | 11 | 1979 | 3 |
| 0 C (32 F): Frost days (min | 62 | 91 | 1964 | 20 |
| -10 C (14 F): Days with min | 6 | 3 | 1937 | 1 |
| 20 C (68 F): Tropical nights (min | 62 | 89 | 1981 | 66 |
| 25 C (77 F): Days with min | 62 | 17 | 1977 | 8 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 62 | 22 | 1914 | 15 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 52 | 7 | 1983 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 8 | 2 | 1983 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 1 | 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 1912.
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).