Waianae 798 Threshold Days by Year

10 fixed thresholds counted per year at Waianae 798 (USC00519231): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waianae 798 Thresholds

Waianae 798: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 1982 with 32.
Waianae 798: days with 25 mm (0.98 in) or more of precipitation in 105 years, most in 1982 with 16.
Waianae 798: days with 50 mm (1.97 in) or more of precipitation in 78 years, most in 1982 with 7.
Waianae 798: days with a maximum temperature at or above 30 C (86 F) in 40 years, most in 1927 with 272.
10 fixed thresholds have at least one qualifying day at Waianae 798.

Days at or above 30 C (86 F)

40 years with a qualifying day

Days per year at Waianae 798 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 272 in 1927.

Days at or above 30 C (86 F) per year at Waianae 798
Year	Days	Decade average
1906	192	163
1907	151	163
1908	146	163
1910	123	175.9
1911	126	175.9
1912	192	175.9
1913	191	175.9
1914	172	175.9
1915	196	175.9
1916	190	175.9
1917	187	175.9
1918	172	175.9
1919	210	175.9
1920	176	191.8
1921	118	191.8
1922	148	191.8
1923	207	191.8
1924	187	191.8
1925	189	191.8
1926	255	191.8
1927	272	191.8
1928	177	191.8
1929	189	191.8
1930	184	167.9
1931	158	167.9
1932	169	167.9
1933	116	167.9
1934	189	167.9
1935	177	167.9
1936	163	167.9
1937	168	167.9
1938	187	167.9
1940	229	225.6
1941	207	225.6
1942	216	225.6
1943	235	225.6
1944	235	225.6
1945	232	225.6
1946	217	225.6
1947	234	225.6

For each year, a bar from the first to the last day at Waianae 798 meeting 30 C (86 F).

First to last qualifying date each year at Waianae 798
Year	First date	Last date
1906	1906-02-27	1906-12-25
1907	1907-05-11	1907-12-04
1908	1908-04-30	1908-11-23
1910	1910-01-11	1910-11-06
1911	1911-04-12	1911-12-27
1912	1912-02-23	1912-12-16
1913	1913-01-10	1913-12-31
1914	1914-04-15	1914-12-02
1915	1915-02-28	1915-12-13
1916	1916-03-12	1916-12-10
1917	1917-05-07	1917-12-18
1918	1918-01-30	1918-12-30
1919	1919-01-10	1919-12-31
1920	1920-01-01	1920-12-08
1921	1921-01-01	1921-12-09
1922	1922-03-24	1922-12-25
1923	1923-03-25	1923-12-27
1924	1924-01-01	1924-12-31
1925	1925-01-03	1925-12-15
1926	1926-01-03	1926-12-31
1927	1927-01-01	1927-12-06
1928	1928-03-09	1928-11-21
1929	1929-01-01	1929-11-11
1930	1930-04-17	1930-12-14
1931	1931-04-09	1931-11-22
1932	1932-01-18	1932-11-16
1933	1933-05-03	1933-11-01
1934	1934-01-02	1934-12-19
1935	1935-02-09	1935-11-26
1936	1936-01-05	1936-11-28
1937	1937-04-12	1937-12-15
1938	1938-01-13	1938-12-26
1940	1940-02-06	1940-12-18
1941	1941-01-04	1941-12-25
1942	1942-02-10	1942-12-30
1943	1943-01-06	1943-12-30
1944	1944-01-03	1944-12-24
1945	1945-01-11	1945-12-04
1946	1946-01-01	1946-12-14
1947	1947-03-05	1947-12-07

Every Fixed Threshold

Fixed thresholds at Waianae 798
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	40	272	1927	234
35 C (95 F): Days	9	8	1947	8
90 F (32.2 C): Days	40	130	1947	130
20 C (68 F): Tropical nights (min	39	254	1930	191
25 C (77 F): Days with min	22	17	1940	2
10 mm (0.39 in): Days with 10 mm or more rain	107	32	1982	14
25 mm (0.98 in): Days with 25 mm or more rain	105	16	1982	5
50 mm (1.97 in): Days with 50 mm or more rain	78	7	1982	2
100 mm (3.94 in): Days with 100 mm or more rain	28	3	1982	1
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

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Data for Waianae 798 threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Waianae 798 Threshold Days by Year

Key Facts for Waianae 798 Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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