Helemano Intake 881 Weather Records (USC00511384)

Record envelope, standing records and threshold days for Helemano Intake 881 (USC00511384), Hawaii, United States, with 37 years of record.

Key Facts for Helemano Intake 881

Helemano Intake 881 (USC00511384) is a weather station in Hawaii, United States at 21.55 latitude and -158.00 longitude, 387 m (1,270 ft) above sea level.
The station reports from 1942 to 1978, 37 years of record.
2 records set at Helemano Intake 881 still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Hawaii, United States, 21.55 latitude, -158.00 longitude.
Elevation: 387 m (1,270 ft).
Period of record: 1942 to 1978, 37 years.
Eligible elements: none yet.

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 Helemano Intake 881. 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 Helemano Intake 881, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.2 C (99.0 F)	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

2 standing records

2 records at Helemano Intake 881 still stand. 1953 holds the most, with 2.

Wettest Day of Each Month

Nov: 313.2 mm (12.3 in)

The wettest day on record for each calendar month at Helemano Intake 881. The most was 313.2 mm (12.3 in) on 29 November 1954.

Record daily precipitation for each month at Helemano Intake 881
Month	Record daily precipitation (mm)	Date
Jan	189.2 mm (7.4 in)	17 January 1949
Feb	177.0 mm (7.0 in)	8 February 1955
Mar	271.8 mm (10.7 in)	6 March 1958
Apr	125.0 mm (4.9 in)	23 April 1945
May	129.5 mm (5.1 in)	14 May 1960
Jun	62.2 mm (2.4 in)	8 June 1944
Jul	74.9 mm (2.9 in)	3 July 1958
Aug	132.8 mm (5.2 in)	6 August 1959
Sep	55.9 mm (2.2 in)	17 September 1963
Oct	147.3 mm (5.8 in)	13 October 1965
Nov	313.2 mm (12.3 in)	29 November 1954
Dec	132.8 mm (5.2 in)	18 December 1949

Period of Record Coverage

1953 to 1953

1 years of record at Helemano Intake 881, 1953 to 1953. 1 years have data for under 90 percent of days and are left out of rankings: 1953.

Latest Records

No records were set at this station in the latest data.

Extremes by Year

1942 to 1978

Yearly extremes at Helemano Intake 881: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1953	37.2 C (99.0 F)	1
Wettest day (Rx1day)	313.2 mm (12.3 in)	1954	95.5 mm (3.8 in)	37
Wettest five days (Rx5day)	352.6 mm (13.9 in)	1949	166.3 mm (6.5 in)	34
Longest dry spell (CDD)	26 days	1964	12 days	37

Hottest day (TXx)

The hottest day of the year at Helemano Intake 881, 1942 to 1978. The record is 37.2 C (99.0 F) in 1953, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Helemano Intake 881 by year
Year	Hottest day (TXx)
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	37.2 C (99.0 F)
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a

Wettest day (Rx1day)

The wettest day of the year at Helemano Intake 881, 1942 to 1978. The record is 313.2 mm (12.3 in) in 1954, marked on the chart; the median year is 95.5 mm (3.8 in).

Wettest day (Rx1day) at Helemano Intake 881 by year
Year	Wettest day (Rx1day)
1942	98.6 mm (3.9 in)
1943	83.8 mm (3.3 in)
1944	79.8 mm (3.1 in)
1945	125.0 mm (4.9 in)
1946	95.5 mm (3.8 in)
1947	89.4 mm (3.5 in)
1948	105.7 mm (4.2 in)
1949	189.2 mm (7.4 in)
1950	157.0 mm (6.2 in)
1951	113.8 mm (4.5 in)
1952	112.5 mm (4.4 in)
1953	86.6 mm (3.4 in)
1954	313.2 mm (12.3 in)
1955	177.0 mm (7.0 in)
1956	96.0 mm (3.8 in)
1957	144.0 mm (5.7 in)
1958	271.8 mm (10.7 in)
1959	132.8 mm (5.2 in)
1960	129.5 mm (5.1 in)
1961	82.0 mm (3.2 in)
1962	116.8 mm (4.6 in)
1963	129.0 mm (5.1 in)
1964	88.9 mm (3.5 in)
1965	147.3 mm (5.8 in)
1966	146.1 mm (5.8 in)
1967	1.5 mm (0.06 in)
1968	23.1 mm (0.9 in)
1969	30.5 mm (1.2 in)
1970	0.0 mm (0.00 in)
1971	66.0 mm (2.6 in)
1972	24.4 mm (1.0 in)
1973	25.9 mm (1.0 in)
1974	15.7 mm (0.6 in)
1975	13.2 mm (0.5 in)
1976	7.1 mm (0.28 in)
1977	46.7 mm (1.8 in)
1978	3.8 mm (0.15 in)

Wettest five days (Rx5day)

The wettest five days of the year at Helemano Intake 881, 1942 to 1978. The record is 352.6 mm (13.9 in) in 1949, marked on the chart; the median year is 166.3 mm (6.5 in).

Wettest five days (Rx5day) at Helemano Intake 881 by year
Year	Wettest five days (Rx5day)
1942	153.4 mm (6.0 in)
1943	177.6 mm (7.0 in)
1944	217.7 mm (8.6 in)
1945	272.3 mm (10.7 in)
1946	190.5 mm (7.5 in)
1947	164.0 mm (6.5 in)
1948	271.6 mm (10.7 in)
1949	352.6 mm (13.9 in)
1950	244.9 mm (9.6 in)
1951	264.5 mm (10.4 in)
1952	142.7 mm (5.6 in)
1953	148.8 mm (5.9 in)
1954	351.4 mm (13.8 in)
1955	288.0 mm (11.3 in)
1956	129.2 mm (5.1 in)
1957	346.7 mm (13.6 in)
1958	312.7 mm (12.3 in)
1959	168.6 mm (6.6 in)
1960	180.3 mm (7.1 in)
1961	135.5 mm (5.3 in)
1962	241.7 mm (9.5 in)
1963	199.2 mm (7.8 in)
1964	138.9 mm (5.5 in)
1965	200.8 mm (7.9 in)
1966	n/a
1967	n/a
1968	0.0 mm (0.00 in)
1969	0.0 mm (0.00 in)
1970	n/a
1971	66.0 mm (2.6 in)
1972	31.0 mm (1.2 in)
1973	12.4 mm (0.5 in)
1974	15.7 mm (0.6 in)
1975	13.7 mm (0.5 in)
1976	4.3 mm (0.17 in)
1977	46.7 mm (1.8 in)
1978	6.8 mm (0.27 in)

Longest dry spell (CDD)

The longest dry spell of the year at Helemano Intake 881, 1942 to 1978. The record is 26 days in 1964, marked on the chart; the median year is 12 days.

Longest dry spell (CDD) at Helemano Intake 881 by year
Year	Longest dry spell (CDD)
1942	7 days
1943	12 days
1944	15 days
1945	7 days
1946	9 days
1947	8 days
1948	7 days
1949	9 days
1950	8 days
1951	9 days
1952	10 days
1953	13 days
1954	13 days
1955	8 days
1956	8 days
1957	23 days
1958	14 days
1959	16 days
1960	12 days
1961	12 days
1962	13 days
1963	18 days
1964	26 days
1965	17 days
1966	4 days
1967	4 days
1968	7 days
1969	14 days
1970	2 days
1971	14 days
1972	10 days
1973	12 days
1974	6 days
1975	13 days
1976	9 days
1977	13 days
1978	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.

Download the Data

Data for Helemano Intake 881 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Helemano Intake 881 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).