Window Rock 4 SW Threshold Days by Year (USC00029410)
14 fixed thresholds counted per year at Window Rock 4 SW (USC00029410): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Window Rock 4 SW Thresholds
- Window Rock 4 SW: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1986 with 15.
- Window Rock 4 SW: nights with a minimum temperature at or below 0 C (32 F) in 54 years, most in 1975 with 222.
- Window Rock 4 SW: nights with a minimum temperature at or below -10 C (14 F) in 54 years, most in 1944 with 95.
- Window Rock 4 SW: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1944 with 65.
- 14 fixed thresholds have at least one qualifying day at Window Rock 4 SW.
Days at or above 30 C (86 F)
52 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1938 | 45 | 51.5 |
| 1939 | 58 | 51.5 |
| 1940 | 55 | 47 |
| 1941 | 20 | 47 |
| 1942 | 46 | 47 |
| 1943 | 51 | 47 |
| 1944 | 65 | 47 |
| 1945 | 34 | 47 |
| 1946 | 53 | 47 |
| 1947 | 52 | 47 |
| 1950 | 39 | 47 |
| 1951 | 55 | 47 |
| 1952 | 48 | 47 |
| 1953 | 57 | 47 |
| 1954 | 42 | 47 |
| 1955 | 38 | 47 |
| 1956 | 65 | 47 |
| 1957 | 27 | 47 |
| 1959 | 52 | 47 |
| 1960 | 64 | 34.1 |
| 1961 | 48 | 34.1 |
| 1962 | 41 | 34.1 |
| 1963 | 29 | 34.1 |
| 1964 | 24 | 34.1 |
| 1965 | 13 | 34.1 |
| 1966 | 45 | 34.1 |
| 1967 | 22 | 34.1 |
| 1968 | 29 | 34.1 |
| 1969 | 26 | 34.1 |
| 1970 | 24 | 28.3 |
| 1971 | 44 | 28.3 |
| 1972 | 27 | 28.3 |
| 1973 | 26 | 28.3 |
| 1974 | 32 | 28.3 |
| 1975 | 19 | 28.3 |
| 1976 | 23 | 28.3 |
| 1977 | 26 | 28.3 |
| 1978 | 34 | 28.3 |
| 1982 | 23 | 38.9 |
| 1984 | 29 | 38.9 |
| 1985 | 53 | 38.9 |
| 1986 | 30 | 38.9 |
| 1987 | 39 | 38.9 |
| 1988 | 48 | 38.9 |
| 1989 | 50 | 38.9 |
| 1990 | 45 | 31.7 |
| 1991 | 17 | 31.7 |
| 1992 | 13 | 31.7 |
| 1993 | 31 | 31.7 |
| 1994 | 47 | 31.7 |
| 1996 | 36 | 31.7 |
| 1998 | 33 | 31.7 |
| Year | First date | Last date |
|---|---|---|
| 1938 | 1938-06-02 | 1938-08-29 |
| 1939 | 1939-06-03 | 1939-08-25 |
| 1940 | 1940-06-11 | 1940-08-30 |
| 1941 | 1941-06-22 | 1941-08-19 |
| 1942 | 1942-06-16 | 1942-09-03 |
| 1943 | 1943-06-06 | 1943-09-10 |
| 1944 | 1944-06-07 | 1944-09-22 |
| 1945 | 1945-06-13 | 1945-09-08 |
| 1946 | 1946-06-03 | 1946-08-05 |
| 1947 | 1947-05-02 | 1947-09-04 |
| 1950 | 1950-06-10 | 1950-09-02 |
| 1951 | 1951-05-26 | 1951-08-19 |
| 1952 | 1952-06-06 | 1952-09-19 |
| 1953 | 1953-06-09 | 1953-09-25 |
| 1954 | 1954-06-18 | 1954-09-02 |
| 1955 | 1955-06-07 | 1955-09-11 |
| 1956 | 1956-05-30 | 1956-09-21 |
| 1957 | 1957-06-03 | 1957-09-09 |
| 1959 | 1959-05-13 | 1959-09-10 |
| 1960 | 1960-06-04 | 1960-09-14 |
| 1961 | 1961-06-11 | 1961-08-29 |
| 1962 | 1962-06-20 | 1962-09-16 |
| 1963 | 1963-06-19 | 1963-08-01 |
| 1964 | 1964-06-16 | 1964-08-18 |
| 1965 | 1965-07-03 | 1965-08-27 |
| 1966 | 1966-05-08 | 1966-08-19 |
| 1967 | 1967-06-27 | 1967-09-05 |
| 1968 | 1968-06-15 | 1968-07-27 |
| 1969 | 1969-06-29 | 1969-08-22 |
| 1970 | 1970-06-20 | 1970-08-31 |
| 1971 | 1971-06-16 | 1971-09-13 |
| 1972 | 1972-06-29 | 1972-10-02 |
| 1973 | 1973-06-09 | 1973-08-20 |
| 1974 | 1974-05-28 | 1974-09-11 |
| 1975 | 1975-06-14 | 1975-08-31 |
| 1976 | 1976-06-21 | 1976-09-04 |
| 1977 | 1977-06-01 | 1977-09-09 |
| 1978 | 1978-06-19 | 1978-09-06 |
| 1982 | 1982-06-26 | 1982-09-04 |
| 1984 | 1984-05-22 | 1984-09-11 |
| 1985 | 1985-06-06 | 1985-08-30 |
| 1986 | 1986-06-12 | 1986-08-22 |
| 1987 | 1987-06-12 | 1987-08-20 |
| 1988 | 1988-05-15 | 1988-09-12 |
| 1989 | 1989-05-07 | 1989-09-03 |
| 1990 | 1990-06-03 | 1990-09-13 |
| 1991 | 1991-06-18 | 1991-08-30 |
| 1992 | 1992-06-28 | 1992-08-18 |
| 1993 | 1993-06-13 | 1993-08-24 |
| 1994 | 1994-06-10 | 1994-08-26 |
| 1996 | 1996-05-13 | 1996-08-29 |
| 1998 | 1998-06-25 | 1998-09-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 52 | 65 | 1944 | 33 |
| 35 C (95 F): Days | 25 | 9 | 1989 | 1 |
| 90 F (32.2 C): Days | 52 | 34 | 1960 | 15 |
| 0 C (32 F): Ice days (max | 52 | 21 | 1975 | 9 |
| 0 C (32 F): Frost days (min | 54 | 222 | 1975 | 158 |
| -10 C (14 F): Days with min | 54 | 95 | 1944 | 26 |
| -20 C (-4 F): Days with min | 41 | 10 | 1955 | 2 |
| -30 C (-22 F): Days with min | 5 | 3 | 1971 | 1 |
| 20 C (68 F): Tropical nights (min | 7 | 3 | 1942 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 55 | 15 | 1986 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 30 | 5 | 1941 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 4 | 1 | 1945 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 37 | 11 | 1961 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1968 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.
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).