Pahala 21 Threshold Days by Year
9 fixed thresholds counted per year at Pahala 21 (USC00517421): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Pahala 21 Thresholds
- Pahala 21: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 1968 with 49.
- Pahala 21: days with 25 mm (0.98 in) or more of precipitation in 72 years, most in 1968 with 28.
- Pahala 21: days with 50 mm (1.97 in) or more of precipitation in 71 years, most in 1951 with 16.
- Pahala 21: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 1926 with 119.
- 9 fixed thresholds have at least one qualifying day at Pahala 21.
Days at or above 30 C (86 F)
55 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1905 | 78 | 39.2 |
| 1906 | 58 | 39.2 |
| 1907 | 12 | 39.2 |
| 1908 | 35 | 39.2 |
| 1909 | 13 | 39.2 |
| 1910 | 16 | 12.9 |
| 1913 | 31 | 12.9 |
| 1915 | 10 | 12.9 |
| 1916 | 11 | 12.9 |
| 1917 | 6 | 12.9 |
| 1918 | 7 | 12.9 |
| 1919 | 9 | 12.9 |
| 1920 | 7 | 39.9 |
| 1921 | 12 | 39.9 |
| 1922 | 9 | 39.9 |
| 1923 | 26 | 39.9 |
| 1924 | 2 | 39.9 |
| 1925 | 99 | 39.9 |
| 1926 | 119 | 39.9 |
| 1927 | 72 | 39.9 |
| 1928 | 37 | 39.9 |
| 1929 | 16 | 39.9 |
| 1930 | 30 | 15 |
| 1931 | 9 | 15 |
| 1939 | 6 | 15 |
| 1940 | 12 | 10.4 |
| 1941 | 11 | 10.4 |
| 1942 | 22 | 10.4 |
| 1943 | 11 | 10.4 |
| 1944 | 7 | 10.4 |
| 1945 | 6 | 10.4 |
| 1946 | 9 | 10.4 |
| 1947 | 5 | 10.4 |
| 1948 | 15 | 10.4 |
| 1949 | 6 | 10.4 |
| 1950 | 9 | 11.3 |
| 1951 | 13 | 11.3 |
| 1952 | 9 | 11.3 |
| 1953 | 9 | 11.3 |
| 1954 | 13 | 11.3 |
| 1955 | 3 | 11.3 |
| 1956 | 3 | 11.3 |
| 1957 | 15 | 11.3 |
| 1958 | 16 | 11.3 |
| 1959 | 23 | 11.3 |
| 1960 | 17 | 7 |
| 1961 | 11 | 7 |
| 1962 | 2 | 7 |
| 1963 | 12 | 7 |
| 1964 | 5 | 7 |
| 1965 | 2 | 7 |
| 1966 | 7 | 7 |
| 1967 | 5 | 7 |
| 1968 | 4 | 7 |
| 1969 | 5 | 7 |
| Year | First date | Last date |
|---|---|---|
| 1905 | 1905-04-10 | 1905-10-31 |
| 1906 | 1906-02-10 | 1906-11-18 |
| 1907 | 1907-07-19 | 1907-10-19 |
| 1908 | 1908-04-20 | 1908-12-09 |
| 1909 | 1909-01-25 | 1909-10-11 |
| 1910 | 1910-03-31 | 1910-10-10 |
| 1913 | 1913-02-25 | 1913-11-08 |
| 1915 | 1915-05-05 | 1915-09-26 |
| 1916 | 1916-06-28 | 1916-09-19 |
| 1917 | 1917-09-22 | 1917-11-08 |
| 1918 | 1918-07-09 | 1918-08-20 |
| 1919 | 1919-07-21 | 1919-08-29 |
| 1920 | 1920-06-15 | 1920-11-29 |
| 1921 | 1921-07-21 | 1921-12-06 |
| 1922 | 1922-08-18 | 1922-10-17 |
| 1923 | 1923-07-05 | 1923-11-03 |
| 1924 | 1924-07-29 | 1924-08-04 |
| 1925 | 1925-06-08 | 1925-12-21 |
| 1926 | 1926-02-10 | 1926-10-25 |
| 1927 | 1927-02-16 | 1927-11-18 |
| 1928 | 1928-03-24 | 1928-10-14 |
| 1929 | 1929-05-14 | 1929-11-26 |
| 1930 | 1930-06-30 | 1930-11-22 |
| 1931 | 1931-07-16 | 1931-10-20 |
| 1939 | 1939-08-03 | 1939-12-29 |
| 1940 | 1940-01-26 | 1940-10-20 |
| 1941 | 1941-05-17 | 1941-09-05 |
| 1942 | 1942-02-20 | 1942-11-14 |
| 1943 | 1943-01-18 | 1943-12-26 |
| 1944 | 1944-01-01 | 1944-10-02 |
| 1945 | 1945-07-17 | 1945-11-06 |
| 1946 | 1946-07-12 | 1946-09-13 |
| 1947 | 1947-02-02 | 1947-09-22 |
| 1948 | 1948-04-18 | 1948-11-02 |
| 1949 | 1949-07-09 | 1949-11-25 |
| 1950 | 1950-01-13 | 1950-12-08 |
| 1951 | 1951-03-15 | 1951-09-29 |
| 1952 | 1952-07-08 | 1952-11-16 |
| 1953 | 1953-08-02 | 1953-11-08 |
| 1954 | 1954-06-07 | 1954-10-10 |
| 1955 | 1955-07-13 | 1955-09-26 |
| 1956 | 1956-08-17 | 1956-09-23 |
| 1957 | 1957-02-21 | 1957-09-16 |
| 1958 | 1958-02-23 | 1958-11-08 |
| 1959 | 1959-01-19 | 1959-11-29 |
| 1960 | 1960-04-25 | 1960-10-06 |
| 1961 | 1961-01-27 | 1961-10-08 |
| 1962 | 1962-09-02 | 1962-09-05 |
| 1963 | 1963-01-31 | 1963-10-20 |
| 1964 | 1964-06-21 | 1964-10-22 |
| 1965 | 1965-05-16 | 1965-09-07 |
| 1966 | 1966-06-29 | 1966-09-11 |
| 1967 | 1967-05-28 | 1967-11-06 |
| 1968 | 1968-02-18 | 1968-09-15 |
| 1969 | 1969-07-14 | 1969-11-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 55 | 119 | 1926 | 5 |
| 35 C (95 F): Days | 3 | 1 | 1905 | 1 |
| 90 F (32.2 C): Days | 22 | 15 | 1925 | 1 |
| 20 C (68 F): Tropical nights (min | 52 | 53 | 1930 | 12 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 72 | 49 | 1968 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 72 | 28 | 1968 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 71 | 16 | 1951 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 55 | 7 | 1951 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 13 | 2 | 1946 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.
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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-12).