Moanalua 770 Weather Records (USC00516395)

Record envelope, standing records and threshold days for Moanalua 770 (USC00516395), Hawaii, United States, with 122 years of record.

Key Facts for Moanalua 770

Moanalua 770 (USC00516395) is a weather station in Hawaii, United States at 21.35 latitude and -157.89 longitude, 10 m (32 ft) above sea level.
The station reports from 1905 to 2026, 122 years of record.
0 records set at Moanalua 770 still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Moanalua 770 set a daily record precipitation of 12.4 mm (0.5 in) on 31 May 2026.

About the Station

Location: Hawaii, United States, 21.35 latitude, -157.89 longitude.
Elevation: 10 m (32 ft).
Period of record: 1905 to 2026, 122 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Moanalua 770. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Moanalua 770, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Moanalua 770 still stand.

All-Time Record Progression

2 new records

2 all-time records were set at Moanalua 770 between 23 October 1939 and 29 November 1954. Each dot is a new record.

When Moanalua 770 set new all-time records
Date	Kind	Detail
1939-10-23	Record daily precipitation	Record daily precipitation 205.2 mm (8.1 in)
1954-11-29	Record daily precipitation	Record daily precipitation 240.0 mm (9.4 in)

Wettest Day of Each Month

Nov: 240.0 mm (9.4 in)

The wettest day on record for each calendar month at Moanalua 770. The most was 240.0 mm (9.4 in) on 29 November 1954.

Record daily precipitation for each month at Moanalua 770
Month	Record daily precipitation (mm)	Date
Jan	140.0 mm (5.5 in)	7 January 1963
Feb	180.1 mm (7.1 in)	28 February 1995
Mar	160.5 mm (6.3 in)	20 March 1917
Apr	119.6 mm (4.7 in)	26 April 1934
May	105.4 mm (4.1 in)	15 May 1963
Jun	137.9 mm (5.4 in)	26 June 2019
Jul	59.7 mm (2.4 in)	26 July 1970
Aug	81.5 mm (3.2 in)	28 August 2018
Sep	96.0 mm (3.8 in)	13 September 2018
Oct	205.2 mm (8.1 in)	23 October 1939
Nov	240.0 mm (9.4 in)	29 November 1954
Dec	223.0 mm (8.8 in)	7 December 2021

Latest Records

Latest records at Moanalua 770
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 May 2026	Moanalua 770, US	daily rain	12.4 mm (0.5 in)	1.2 mm (0.05 in)	105 years	20 of 100 (Routine)
21 March 2026	Moanalua 770, US	daily rain	69.1 mm (2.7 in)	29.0 mm (1.1 in)	59 years	48 of 100 (Notable)
14 March 2026	Moanalua 770, US	daily rain	142.0 mm (5.6 in)	93.0 mm (3.7 in)	16 years	55 of 100 (Notable)
31 January 2025	Moanalua 770, US	daily rain	84.6 mm (3.3 in)	32.5 mm (1.3 in)	118 years	59 of 100 (Notable)
27 October 2024	Moanalua 770, US	daily rain	42.4 mm (1.7 in)	0.5 mm (0.02 in)	42 years	22 of 100 (Routine)
17 May 2024	Moanalua 770, US	daily rain	57.2 mm (2.3 in)	14.0 mm (0.6 in)	25 years	36 of 100 (Notable)
16 May 2024	Moanalua 770, US	daily rain	41.1 mm (1.6 in)	13.4 mm (0.5 in)	20 years	35 of 100 (Notable)
29 June 2023	Moanalua 770, US	daily rain (Tie)	3.8 mm (0.15 in)	tie	78 years	8 of 100 (Routine)
20 May 2022	Moanalua 770, US	daily rain	29.0 mm (1.1 in)	16.3 mm (0.6 in)	91 years	60 of 100 (Major)
2 January 2022	Moanalua 770, US	daily rain	65.3 mm (2.6 in)	4.6 mm (0.18 in)	16 years	17 of 100 (Routine)
7 December 2021	Moanalua 770, US	monthly rain	223.0 mm (8.8 in)	42.4 mm (1.7 in)	65 years	64 of 100 (Major)
9 March 2021	Moanalua 770, US	daily rain	62.5 mm (2.5 in)	17.5 mm (0.7 in)	78 years	45 of 100 (Notable)
26 January 2021	Moanalua 770, US	daily rain	125.5 mm (4.9 in)	53.9 mm (2.1 in)	60 years	60 of 100 (Major)
14 April 2020	Moanalua 770, US	daily rain	53.6 mm (2.1 in)	25.2 mm (1.0 in)	57 years	51 of 100 (Notable)
18 March 2020	Moanalua 770, US	daily rain	67.8 mm (2.7 in)	37.3 mm (1.5 in)	57 years	53 of 100 (Notable)
25 September 2019	Moanalua 770, US	daily rain	19.1 mm (0.8 in)	4.6 mm (0.18 in)	94 years	20 of 100 (Routine)
26 June 2019	Moanalua 770, US	monthly rain	137.9 mm (5.4 in)	85.3 mm (3.4 in)	51 years	75 of 100 (Major)
29 May 2019	Moanalua 770, US	daily rain	20.8 mm (0.8 in)	11.1 mm (0.4 in)	5 years	20 of 100 (Routine)
30 October 2018	Moanalua 770, US	daily rain	54.4 mm (2.1 in)	0.6 mm (0.02 in)	76 years	32 of 100 (Routine)
13 September 2018	Moanalua 770, US	monthly rain	96.0 mm (3.8 in)	19.0 mm (0.7 in)	22 years	49 of 100 (Notable)

Extremes by Year

1905 to 2026

Yearly extremes at Moanalua 770: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	240.0 mm (9.4 in)	1954	76.5 mm (3.0 in)	122
Wettest five days (Rx5day)	332.0 mm (13.1 in)	1965	121.0 mm (4.8 in)	122
Longest dry spell (CDD)	51 days	1949	20 days	122

Wettest day (Rx1day)

The wettest day of the year at Moanalua 770, 1905 to 2026. The record is 240.0 mm (9.4 in) in 1954, marked on the chart; the median year is 76.5 mm (3.0 in).

Wettest day (Rx1day) at Moanalua 770 by year
Year	Wettest day (Rx1day)
1905	50.3 mm (2.0 in)
1906	77.5 mm (3.1 in)
1907	54.4 mm (2.1 in)
1908	102.1 mm (4.0 in)
1909	43.7 mm (1.7 in)
1910	66.8 mm (2.6 in)
1911	72.4 mm (2.9 in)
1912	55.9 mm (2.2 in)
1913	52.1 mm (2.1 in)
1914	53.8 mm (2.1 in)
1915	43.9 mm (1.7 in)
1916	85.6 mm (3.4 in)
1917	160.5 mm (6.3 in)
1918	93.2 mm (3.7 in)
1919	49.0 mm (1.9 in)
1920	160.5 mm (6.3 in)
1921	82.6 mm (3.3 in)
1922	47.5 mm (1.9 in)
1923	82.6 mm (3.3 in)
1924	82.3 mm (3.2 in)
1925	40.4 mm (1.6 in)
1926	71.1 mm (2.8 in)
1927	102.1 mm (4.0 in)
1928	48.0 mm (1.9 in)
1929	149.4 mm (5.9 in)
1930	91.4 mm (3.6 in)
1931	64.3 mm (2.5 in)
1932	81.3 mm (3.2 in)
1933	102.6 mm (4.0 in)
1934	119.6 mm (4.7 in)
1935	104.9 mm (4.1 in)
1936	94.2 mm (3.7 in)
1937	78.0 mm (3.1 in)
1938	39.1 mm (1.5 in)
1939	205.2 mm (8.1 in)
1940	95.0 mm (3.7 in)
1941	44.2 mm (1.7 in)
1942	57.9 mm (2.3 in)
1943	84.1 mm (3.3 in)
1944	42.2 mm (1.7 in)
1945	53.1 mm (2.1 in)
1946	57.9 mm (2.3 in)
1947	47.8 mm (1.9 in)
1948	66.0 mm (2.6 in)
1949	136.7 mm (5.4 in)
1950	97.3 mm (3.8 in)
1951	125.7 mm (4.9 in)
1952	97.8 mm (3.9 in)
1953	43.2 mm (1.7 in)
1954	240.0 mm (9.4 in)
1955	180.6 mm (7.1 in)
1956	76.2 mm (3.0 in)
1957	137.9 mm (5.4 in)
1958	116.3 mm (4.6 in)
1959	58.7 mm (2.3 in)
1960	37.1 mm (1.5 in)
1961	71.6 mm (2.8 in)
1962	24.9 mm (1.0 in)
1963	140.0 mm (5.5 in)
1964	78.2 mm (3.1 in)
1965	163.1 mm (6.4 in)
1966	88.4 mm (3.5 in)
1967	118.1 mm (4.6 in)
1968	87.4 mm (3.4 in)
1969	124.0 mm (4.9 in)
1970	59.7 mm (2.4 in)
1971	49.3 mm (1.9 in)
1972	93.2 mm (3.7 in)
1973	33.5 mm (1.3 in)
1974	38.6 mm (1.5 in)
1975	99.6 mm (3.9 in)
1976	39.9 mm (1.6 in)
1977	48.0 mm (1.9 in)
1978	145.3 mm (5.7 in)
1979	63.2 mm (2.5 in)
1980	80.3 mm (3.2 in)
1981	49.3 mm (1.9 in)
1982	69.3 mm (2.7 in)
1983	26.7 mm (1.1 in)
1984	109.2 mm (4.3 in)
1985	152.4 mm (6.0 in)
1986	81.3 mm (3.2 in)
1987	109.2 mm (4.3 in)
1988	91.4 mm (3.6 in)
1989	123.2 mm (4.9 in)
1990	59.9 mm (2.4 in)
1991	85.1 mm (3.4 in)
1992	76.7 mm (3.0 in)
1993	55.1 mm (2.2 in)
1994	100.6 mm (4.0 in)
1995	180.1 mm (7.1 in)
1996	102.1 mm (4.0 in)
1997	85.9 mm (3.4 in)
1998	44.2 mm (1.7 in)
1999	55.9 mm (2.2 in)
2000	49.0 mm (1.9 in)
2001	62.5 mm (2.5 in)
2002	73.7 mm (2.9 in)
2003	80.8 mm (3.2 in)
2004	75.2 mm (3.0 in)
2005	72.4 mm (2.9 in)
2006	68.6 mm (2.7 in)
2007	77.5 mm (3.1 in)
2008	63.5 mm (2.5 in)
2009	49.0 mm (1.9 in)
2010	87.6 mm (3.4 in)
2011	70.6 mm (2.8 in)
2012	56.4 mm (2.2 in)
2013	69.3 mm (2.7 in)
2014	69.3 mm (2.7 in)
2015	61.5 mm (2.4 in)
2016	49.5 mm (1.9 in)
2017	79.2 mm (3.1 in)
2018	96.0 mm (3.8 in)
2019	137.9 mm (5.4 in)
2020	67.8 mm (2.7 in)
2021	223.0 mm (8.8 in)
2022	65.3 mm (2.6 in)
2023	40.1 mm (1.6 in)
2024	57.2 mm (2.3 in)
2025	84.6 mm (3.3 in)
2026	142.0 mm (5.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at Moanalua 770, 1905 to 2026. The record is 332.0 mm (13.1 in) in 1965, marked on the chart; the median year is 121.0 mm (4.8 in).

Wettest five days (Rx5day) at Moanalua 770 by year
Year	Wettest five days (Rx5day)
1905	74.2 mm (2.9 in)
1906	141.8 mm (5.6 in)
1907	157.3 mm (6.2 in)
1908	233.7 mm (9.2 in)
1909	109.7 mm (4.3 in)
1910	97.8 mm (3.9 in)
1911	106.9 mm (4.2 in)
1912	65.3 mm (2.6 in)
1913	68.1 mm (2.7 in)
1914	61.4 mm (2.4 in)
1915	160.9 mm (6.3 in)
1916	177.3 mm (7.0 in)
1917	118.6 mm (4.7 in)
1918	179.1 mm (7.1 in)
1919	55.4 mm (2.2 in)
1920	113.1 mm (4.5 in)
1921	116.3 mm (4.6 in)
1922	109.5 mm (4.3 in)
1923	111.6 mm (4.4 in)
1924	90.2 mm (3.6 in)
1925	102.1 mm (4.0 in)
1926	71.1 mm (2.8 in)
1927	160.7 mm (6.3 in)
1928	68.8 mm (2.7 in)
1929	190.1 mm (7.5 in)
1930	139.4 mm (5.5 in)
1931	102.8 mm (4.0 in)
1932	143.3 mm (5.6 in)
1933	186.7 mm (7.4 in)
1934	122.9 mm (4.8 in)
1935	133.3 mm (5.2 in)
1936	206.2 mm (8.1 in)
1937	198.1 mm (7.8 in)
1938	77.1 mm (3.0 in)
1939	299.4 mm (11.8 in)
1940	114.3 mm (4.5 in)
1941	50.0 mm (2.0 in)
1942	108.5 mm (4.3 in)
1943	202.9 mm (8.0 in)
1944	94.3 mm (3.7 in)
1945	105.4 mm (4.1 in)
1946	104.6 mm (4.1 in)
1947	69.9 mm (2.8 in)
1948	156.7 mm (6.2 in)
1949	203.7 mm (8.0 in)
1950	197.0 mm (7.8 in)
1951	308.9 mm (12.2 in)
1952	109.8 mm (4.3 in)
1953	86.4 mm (3.4 in)
1954	252.5 mm (9.9 in)
1955	314.5 mm (12.4 in)
1956	110.5 mm (4.4 in)
1957	309.2 mm (12.2 in)
1958	133.9 mm (5.3 in)
1959	80.1 mm (3.2 in)
1960	38.9 mm (1.5 in)
1961	76.7 mm (3.0 in)
1962	58.2 mm (2.3 in)
1963	199.5 mm (7.9 in)
1964	100.0 mm (3.9 in)
1965	332.0 mm (13.1 in)
1966	110.9 mm (4.4 in)
1967	129.5 mm (5.1 in)
1968	163.9 mm (6.5 in)
1969	125.8 mm (5.0 in)
1970	123.8 mm (4.9 in)
1971	90.0 mm (3.5 in)
1972	137.7 mm (5.4 in)
1973	79.5 mm (3.1 in)
1974	93.9 mm (3.7 in)
1975	242.2 mm (9.5 in)
1976	80.5 mm (3.2 in)
1977	49.3 mm (1.9 in)
1978	233.7 mm (9.2 in)
1979	120.4 mm (4.7 in)
1980	226.4 mm (8.9 in)
1981	82.8 mm (3.3 in)
1982	201.9 mm (7.9 in)
1983	30.0 mm (1.2 in)
1984	132.1 mm (5.2 in)
1985	171.5 mm (6.8 in)
1986	116.9 mm (4.6 in)
1987	241.3 mm (9.5 in)
1988	116.8 mm (4.6 in)
1989	155.5 mm (6.1 in)
1990	144.4 mm (5.7 in)
1991	139.7 mm (5.5 in)
1992	128.7 mm (5.1 in)
1993	95.2 mm (3.7 in)
1994	162.8 mm (6.4 in)
1995	199.2 mm (7.8 in)
1996	277.6 mm (10.9 in)
1997	95.6 mm (3.8 in)
1998	70.1 mm (2.8 in)
1999	78.5 mm (3.1 in)
2000	59.7 mm (2.4 in)
2001	93.3 mm (3.7 in)
2002	171.3 mm (6.7 in)
2003	106.0 mm (4.2 in)
2004	155.2 mm (6.1 in)
2005	88.6 mm (3.5 in)
2006	154.7 mm (6.1 in)
2007	145.3 mm (5.7 in)
2008	166.5 mm (6.6 in)
2009	152.9 mm (6.0 in)
2010	153.4 mm (6.0 in)
2011	110.0 mm (4.3 in)
2012	138.5 mm (5.5 in)
2013	97.1 mm (3.8 in)
2014	148.8 mm (5.9 in)
2015	146.3 mm (5.8 in)
2016	101.2 mm (4.0 in)
2017	107.2 mm (4.2 in)
2018	117.3 mm (4.6 in)
2019	163.1 mm (6.4 in)
2020	114.8 mm (4.5 in)
2021	254.7 mm (10.0 in)
2022	184.6 mm (7.3 in)
2023	79.8 mm (3.1 in)
2024	121.6 mm (4.8 in)
2025	117.1 mm (4.6 in)
2026	299.0 mm (11.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Moanalua 770, 1905 to 2026. The record is 51 days in 1949, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at Moanalua 770 by year
Year	Longest dry spell (CDD)
1905	18 days
1906	21 days
1907	25 days
1908	13 days
1909	20 days
1910	34 days
1911	17 days
1912	26 days
1913	35 days
1914	24 days
1915	24 days
1916	12 days
1917	14 days
1918	24 days
1919	24 days
1920	16 days
1921	27 days
1922	25 days
1923	25 days
1924	29 days
1925	20 days
1926	24 days
1927	15 days
1928	28 days
1929	24 days
1930	17 days
1931	24 days
1932	18 days
1933	23 days
1934	21 days
1935	26 days
1936	13 days
1937	13 days
1938	14 days
1939	18 days
1940	20 days
1941	32 days
1942	22 days
1943	18 days
1944	23 days
1945	34 days
1946	14 days
1947	16 days
1948	15 days
1949	51 days
1950	27 days
1951	21 days
1952	38 days
1953	39 days
1954	9 days
1955	17 days
1956	18 days
1957	19 days
1958	17 days
1959	15 days
1960	16 days
1961	14 days
1962	19 days
1963	17 days
1964	20 days
1965	15 days
1966	14 days
1967	13 days
1968	26 days
1969	14 days
1970	15 days
1971	24 days
1972	17 days
1973	17 days
1974	11 days
1975	15 days
1976	13 days
1977	15 days
1978	13 days
1979	18 days
1980	24 days
1981	15 days
1982	9 days
1983	21 days
1984	17 days
1985	16 days
1986	19 days
1987	23 days
1988	12 days
1989	21 days
1990	20 days
1991	14 days
1992	20 days
1993	26 days
1994	11 days
1995	22 days
1996	29 days
1997	23 days
1998	27 days
1999	15 days
2000	17 days
2001	13 days
2002	20 days
2003	23 days
2004	15 days
2005	30 days
2006	17 days
2007	16 days
2008	20 days
2009	23 days
2010	18 days
2011	17 days
2012	26 days
2013	17 days
2014	11 days
2015	25 days
2016	35 days
2017	26 days
2018	20 days
2019	28 days
2020	19 days
2021	23 days
2022	20 days
2023	31 days
2024	14 days
2025	21 days
2026	13 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

81 years, 1906 to 2023

A day with at least 73.7 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 237.4 mm (9.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Moanalua 770: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	73.7 mm (2.9 in)
5 years	105.8 mm (4.2 in)
10 years	131.1 mm (5.2 in)
25 years	168.5 mm (6.6 in)
50 years	200.9 mm (7.9 in)
100 years	237.4 mm (9.3 in)	Longer than the 81 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 81 years of values from 1906 to 2023.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 223.0 mm (8.8 in) in 2021; 205.2 mm (8.1 in) in 1939; 180.6 mm (7.1 in) in 1955.

Download the Data

Data for Moanalua 770 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Moanalua 770 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a