Hilo 86A Threshold Days by Year
9 fixed thresholds counted per year at Hilo 86A (USC00511484): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Hilo 86A Thresholds
- Hilo 86A: days with a maximum temperature at or above 30 C (86 F) in 47 years, most in 1937 with 80.
- Hilo 86A: nights with a minimum temperature at or above 20 C (68 F) in 43 years, most in 1926 with 170.
- Hilo 86A: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1923 with 127.
- Hilo 86A: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1923 with 60.
- 9 fixed thresholds have at least one qualifying day at Hilo 86A.
Days at or above 30 C (86 F)
47 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1905 | 11 | 8.6 |
| 1906 | 11 | 8.6 |
| 1907 | 18 | 8.6 |
| 1908 | 2 | 8.6 |
| 1909 | 1 | 8.6 |
| 1913 | 2 | 12.6 |
| 1914 | 3 | 12.6 |
| 1915 | 4 | 12.6 |
| 1916 | 6 | 12.6 |
| 1917 | 32 | 12.6 |
| 1918 | 38 | 12.6 |
| 1919 | 3 | 12.6 |
| 1920 | 38 | 10.6 |
| 1921 | 9 | 10.6 |
| 1922 | 13 | 10.6 |
| 1923 | 6 | 10.6 |
| 1924 | 2 | 10.6 |
| 1925 | 1 | 10.6 |
| 1926 | 13 | 10.6 |
| 1927 | 11 | 10.6 |
| 1929 | 2 | 10.6 |
| 1930 | 12 | 25.1 |
| 1931 | 9 | 25.1 |
| 1932 | 19 | 25.1 |
| 1934 | 23 | 25.1 |
| 1937 | 80 | 25.1 |
| 1938 | 23 | 25.1 |
| 1939 | 10 | 25.1 |
| 1940 | 34 | 15.9 |
| 1941 | 24 | 15.9 |
| 1942 | 31 | 15.9 |
| 1943 | 9 | 15.9 |
| 1944 | 6 | 15.9 |
| 1945 | 25 | 15.9 |
| 1946 | 4 | 15.9 |
| 1947 | 4 | 15.9 |
| 1948 | 6 | 15.9 |
| 1950 | 7 | 7.1 |
| 1951 | 9 | 7.1 |
| 1952 | 7 | 7.1 |
| 1953 | 3 | 7.1 |
| 1954 | 8 | 7.1 |
| 1955 | 3 | 7.1 |
| 1956 | 8 | 7.1 |
| 1957 | 15 | 7.1 |
| 1958 | 5 | 7.1 |
| 1959 | 6 | 7.1 |
| Year | First date | Last date |
|---|---|---|
| 1905 | 1905-03-16 | 1905-09-09 |
| 1906 | 1906-05-04 | 1906-12-30 |
| 1907 | 1907-05-27 | 1907-11-10 |
| 1908 | 1908-03-13 | 1908-07-15 |
| 1909 | 1909-10-15 | 1909-10-15 |
| 1913 | 1913-08-08 | 1913-08-16 |
| 1914 | 1914-08-16 | 1914-10-22 |
| 1915 | 1915-06-28 | 1915-08-16 |
| 1916 | 1916-09-14 | 1916-11-05 |
| 1917 | 1917-02-13 | 1917-10-27 |
| 1918 | 1918-01-19 | 1918-11-27 |
| 1919 | 1919-06-10 | 1919-10-09 |
| 1920 | 1920-01-21 | 1920-08-24 |
| 1921 | 1921-02-09 | 1921-10-12 |
| 1922 | 1922-06-28 | 1922-12-31 |
| 1923 | 1923-07-18 | 1923-10-01 |
| 1924 | 1924-12-26 | 1924-12-27 |
| 1925 | 1925-09-15 | 1925-09-15 |
| 1926 | 1926-04-12 | 1926-12-04 |
| 1927 | 1927-06-13 | 1927-10-29 |
| 1929 | 1929-09-09 | 1929-09-26 |
| 1930 | 1930-07-26 | 1930-11-12 |
| 1931 | 1931-05-22 | 1931-10-28 |
| 1932 | 1932-02-25 | 1932-11-19 |
| 1934 | 1934-01-04 | 1934-12-07 |
| 1937 | 1937-05-04 | 1937-12-14 |
| 1938 | 1938-01-04 | 1938-11-04 |
| 1939 | 1939-03-20 | 1939-12-12 |
| 1940 | 1940-01-08 | 1940-11-09 |
| 1941 | 1941-01-21 | 1941-12-27 |
| 1942 | 1942-04-24 | 1942-12-13 |
| 1943 | 1943-02-17 | 1943-10-31 |
| 1944 | 1944-03-05 | 1944-10-23 |
| 1945 | 1945-04-22 | 1945-11-18 |
| 1946 | 1946-08-04 | 1946-09-12 |
| 1947 | 1947-06-09 | 1947-11-28 |
| 1948 | 1948-04-07 | 1948-08-15 |
| 1950 | 1950-08-03 | 1950-11-22 |
| 1951 | 1951-05-14 | 1951-09-23 |
| 1952 | 1952-07-16 | 1952-10-18 |
| 1953 | 1953-06-03 | 1953-08-16 |
| 1954 | 1954-02-01 | 1954-11-18 |
| 1955 | 1955-03-23 | 1955-12-23 |
| 1956 | 1956-01-14 | 1956-12-09 |
| 1957 | 1957-04-16 | 1957-12-03 |
| 1958 | 1958-08-02 | 1958-10-24 |
| 1959 | 1959-01-18 | 1959-10-07 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 47 | 80 | 1937 | 6 |
| 90 F (32.2 C): Days | 13 | 4 | 1941 | 1 |
| 20 C (68 F): Tropical nights (min | 43 | 170 | 1926 | 67 |
| 25 C (77 F): Days with min | 2 | 23 | 1957 | 23 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 35 | 127 | 1923 | 85 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 35 | 60 | 1923 | 30 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 35 | 29 | 1923 | 7 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 32 | 10 | 1923 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 15 | 2 | 1921 | 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 (2025-12-31).