Haleakala Summit 338 Weather Records (USC00511008)

Record envelope, standing records and threshold days for Haleakala Summit 338 (USC00511008), Hawaii, United States, with 70 years of record.

Key Facts for Haleakala Summit 338

Haleakala Summit 338 (USC00511008) is a weather station in Hawaii, United States at 20.72 latitude and -156.27 longitude, 3,037 m (9,964 ft) above sea level.
The station reports from 1957 to 2026, 70 years of record.
1,464 records set at Haleakala Summit 338 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, 20.72 latitude, -156.27 longitude.
Elevation: 3,037 m (9,964 ft).
Period of record: 1957 to 2026, 70 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 Haleakala Summit 338. 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 Haleakala Summit 338, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.6 C (69.1 F)	-6.7 C (19.9 F)	n/a	n/a
Feb	20.6 C (69.1 F)	-9.4 C (15.1 F)	n/a	n/a
Mar	19.4 C (66.9 F)	-6.7 C (19.9 F)	n/a	n/a
Apr	20.0 C (68.0 F)	-9.4 C (15.1 F)	n/a	n/a
May	21.1 C (70.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	22.8 C (73.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	18.9 C (66.0 F)	-2.2 C (28.0 F)	n/a	n/a
Aug	21.1 C (70.0 F)	-1.7 C (28.9 F)	n/a	n/a
Sep	20.0 C (68.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	20.0 C (68.0 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	18.3 C (64.9 F)	-2.2 C (28.0 F)	n/a	n/a
Dec	20.6 C (69.1 F)	-5.6 C (21.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Haleakala Summit 338 still stand. 1963 holds the most, with 130.

Standing records at Haleakala Summit 338 by the year they were set
Year set	Standing records
1957	30
1958	111
1959	27
1960	96
1961	61
1962	69
1963	130
1964	103
1965	101
1966	78
1967	130
1968	83
1969	73
1970	43
1971	69
1972	93
1973	83
1974	61
1975	23

Wettest Day of Each Month

Mar: 153.7 mm (6.1 in)

The wettest day on record for each calendar month at Haleakala Summit 338. The most was 153.7 mm (6.1 in) on 24 March 1967.

Record daily precipitation for each month at Haleakala Summit 338
Month	Record daily precipitation (mm)	Date
Jan	95.3 mm (3.8 in)	5 January 1969
Feb	87.1 mm (3.4 in)	2 February 1969
Mar	153.7 mm (6.1 in)	24 March 1967
Apr	112.5 mm (4.4 in)	15 April 1963
May	102.6 mm (4.0 in)	15 May 1963
Jun	38.1 mm (1.5 in)	30 June 1967
Jul	36.8 mm (1.4 in)	17 July 1958
Aug	61.0 mm (2.4 in)	26 August 1970
Sep	70.9 mm (2.8 in)	17 September 1963
Oct	30.5 mm (1.2 in)	23 October 1958
Nov	104.1 mm (4.1 in)	29 November 1968
Dec	143.0 mm (5.6 in)	22 December 1964

Period of Record Coverage

1957 to 1975

19 years of record at Haleakala Summit 338, 1957 to 1975. 14 years have data for under 90 percent of days and are left out of rankings: 1957, 1958, 1959, 1960, 1961, 1962, 1966, 1969 and others.

Days with data per year at Haleakala Summit 338
Year	Days with data	Share of year	Complete
1957	136	37%	No
1958	247	68%	No
1959	69	19%	No
1960	296	81%	No
1961	170	47%	No
1962	241	66%	No
1963	364	100%	Yes
1964	357	98%	Yes
1965	349	96%	Yes
1966	314	86%	No
1967	331	91%	Yes
1968	333	91%	Yes
1969	262	72%	No
1970	283	78%	No
1971	293	80%	No
1972	328	90%	No
1973	324	89%	No
1974	279	76%	No
1975	175	48%	No

Latest Records

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

Extremes by Year

1957 to 2026

Yearly extremes at Haleakala Summit 338: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	22.8 C (73.0 F)	1961	19.4 C (66.9 F)	19
Coldest night (TNn)	-9.4 C (15.1 F)	1958	-3.3 C (26.1 F)	19
Wettest day (Rx1day)	153.7 mm (6.1 in)	1967	58.3 mm (2.3 in)	22
Wettest five days (Rx5day)	442.5 mm (17.4 in)	1964	64.3 mm (2.5 in)	21
Longest dry spell (CDD)	65 days	1962	30 days	22

Hottest day (TXx)

The hottest day of the year at Haleakala Summit 338, 1957 to 2026. The record is 22.8 C (73.0 F) in 1961, marked on the chart; the median year is 19.4 C (66.9 F).

Hottest day (TXx) at Haleakala Summit 338 by year
Year	Hottest day (TXx)
1957	19.4 C (66.9 F)
1958	22.2 C (72.0 F)
1959	18.9 C (66.0 F)
1960	19.4 C (66.9 F)
1961	22.8 C (73.0 F)
1962	19.4 C (66.9 F)
1963	20.0 C (68.0 F)
1964	19.4 C (66.9 F)
1965	18.9 C (66.0 F)
1966	19.4 C (66.9 F)
1967	20.6 C (69.1 F)
1968	20.0 C (68.0 F)
1969	21.1 C (70.0 F)
1970	18.3 C (64.9 F)
1971	18.3 C (64.9 F)
1972	21.1 C (70.0 F)
1973	21.1 C (70.0 F)
1974	21.1 C (70.0 F)
1975	19.4 C (66.9 F)
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Haleakala Summit 338, 1957 to 2026. The record is -9.4 C (15.1 F) in 1958, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Haleakala Summit 338 by year
Year	Coldest night (TNn)
1957	-1.1 C (30.0 F)
1958	-9.4 C (15.1 F)
1959	-3.3 C (26.1 F)
1960	-5.6 C (21.9 F)
1961	-6.1 C (21.0 F)
1962	-5.6 C (21.9 F)
1963	-6.7 C (19.9 F)
1964	-2.2 C (28.0 F)
1965	-5.0 C (23.0 F)
1966	-3.3 C (26.1 F)
1967	-6.7 C (19.9 F)
1968	-1.7 C (28.9 F)
1969	-6.1 C (21.0 F)
1970	-2.8 C (27.0 F)
1971	-2.2 C (28.0 F)
1972	-6.1 C (21.0 F)
1973	-2.8 C (27.0 F)
1974	-2.2 C (28.0 F)
1975	-1.7 C (28.9 F)
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Haleakala Summit 338, 1957 to 2026. The record is 153.7 mm (6.1 in) in 1967, marked on the chart; the median year is 58.3 mm (2.3 in).

Wettest day (Rx1day) at Haleakala Summit 338 by year
Year	Wettest day (Rx1day)
1957	32.5 mm (1.3 in)
1958	50.8 mm (2.0 in)
1959	59.9 mm (2.4 in)
1960	54.9 mm (2.2 in)
1961	61.0 mm (2.4 in)
1962	74.9 mm (2.9 in)
1963	112.5 mm (4.4 in)
1964	143.0 mm (5.6 in)
1965	56.6 mm (2.2 in)
1966	66.0 mm (2.6 in)
1967	153.7 mm (6.1 in)
1968	104.1 mm (4.1 in)
1969	95.3 mm (3.8 in)
1970	61.0 mm (2.4 in)
1971	51.6 mm (2.0 in)
1972	39.9 mm (1.6 in)
1973	54.1 mm (2.1 in)
1974	56.6 mm (2.2 in)
1975	65.0 mm (2.6 in)
2024	0.0 mm (0.00 in)
2025	24.9 mm (1.0 in)
2026	31.2 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Haleakala Summit 338, 1957 to 2026. The record is 442.5 mm (17.4 in) in 1964, marked on the chart; the median year is 64.3 mm (2.5 in).

Wettest five days (Rx5day) at Haleakala Summit 338 by year
Year	Wettest five days (Rx5day)
1957	35.6 mm (1.4 in)
1958	44.4 mm (1.7 in)
1959	0.0 mm (0.00 in)
1960	105.9 mm (4.2 in)
1961	97.9 mm (3.9 in)
1962	86.8 mm (3.4 in)
1963	322.9 mm (12.7 in)
1964	442.5 mm (17.4 in)
1965	126.0 mm (5.0 in)
1966	138.5 mm (5.5 in)
1967	235.8 mm (9.3 in)
1968	219.0 mm (8.6 in)
1969	337.6 mm (13.3 in)
1970	64.3 mm (2.5 in)
1971	30.3 mm (1.2 in)
1972	38.1 mm (1.5 in)
1973	54.1 mm (2.1 in)
1974	44.7 mm (1.8 in)
1975	3.3 mm (0.13 in)
2024	n/a
2025	24.9 mm (1.0 in)
2026	45.9 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Haleakala Summit 338, 1957 to 2026. The record is 65 days in 1962, marked on the chart; the median year is 30 days.

Longest dry spell (CDD) at Haleakala Summit 338 by year
Year	Longest dry spell (CDD)
1957	40 days
1958	46 days
1959	11 days
1960	22 days
1961	27 days
1962	65 days
1963	39 days
1964	30 days
1965	22 days
1966	31 days
1967	30 days
1968	32 days
1969	53 days
1970	25 days
1971	44 days
1972	27 days
1973	56 days
1974	25 days
1975	52 days
2024	3 days
2025	28 days
2026	14 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 Haleakala Summit 338 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Haleakala Summit 338 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).