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Ukumehame 301 Weather Records (USC00518750)

Record envelope, standing records and threshold days for Ukumehame 301 (USC00518750), Hawaii, United States, with 58 years of record.

Key Facts for Ukumehame 301

  • Ukumehame 301 (USC00518750) is a weather station in Hawaii, United States at 20.81 latitude and -156.59 longitude, 24 m (80 ft) above sea level.
  • The station reports from 1942 to 1999, 58 years of record.
  • 0 records set at Ukumehame 301 still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Ukumehame 301 set a daily record precipitation of 96.5 mm (3.8 in) on 21 January 1997.

About the Station

  • Location: Hawaii, United States, 20.81 latitude, -156.59 longitude.
  • Elevation: 24 m (80 ft).
  • Period of record: 1942 to 1999, 58 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Ukumehame 301, with 2026 drawn through them The band shows the record high and record low for each calendar day at Ukumehame 301. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Ukumehame 301. 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 Ukumehame 301, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at Ukumehame 301 by the year they were set 0 records at Ukumehame 301 still stand. 00000000000
0 records at Ukumehame 301 still stand.
Standing records at Ukumehame 301 by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Ukumehame 301 set new all-time records 1 all-time records were set at Ukumehame 301 between 27 December 1983 and 27 December 1983. Each dot is a new record. Record daily precipitation27 December 1983: Record daily precipitation 202.7 mm (8.0 in)
1 all-time records were set at Ukumehame 301 between 27 December 1983 and 27 December 1983. Each dot is a new record.
When Ukumehame 301 set new all-time records
DateKindDetail
1983-12-27Record daily precipitationRecord daily precipitation 202.7 mm (8.0 in)

Wettest Day of Each Month

Dec: 202.7 mm (8.0 in)
Record daily precipitation for each month at Ukumehame 301 The wettest day on record for each calendar month at Ukumehame 301. The most was 202.7 mm (8.0 in) on 27 December 1983. 0100200300 Jan: 136.9 mm (5.4 in), 27 January 1982 Jan Feb: 114.3 mm (4.5 in), 13 February 1959 Feb Mar: 172.7 mm (6.8 in), 24 March 1967 Mar Apr: 104.6 mm (4.1 in), 17 April 1950 Apr May: 92.7 mm (3.6 in), 6 May 1987 May Jun: 30.5 mm (1.2 in), 30 June 1967 Jun Jul: 22.9 mm (0.9 in), 24 July 1964 Jul Aug: 42.2 mm (1.7 in), 15 August 1950 Aug Sep: 52.1 mm (2.1 in), 25 September 1965 Sep Oct: 82.6 mm (3.3 in), 18 October 1985 Oct Nov: 85.1 mm (3.4 in), 10 November 1955 Nov Dec: 202.7 mm (8.0 in), 27 December 1983 Dec
The wettest day on record for each calendar month at Ukumehame 301. The most was 202.7 mm (8.0 in) on 27 December 1983.
Record daily precipitation for each month at Ukumehame 301
MonthRecord daily precipitation (mm)Date
Jan136.9 mm (5.4 in)27 January 1982
Feb114.3 mm (4.5 in)13 February 1959
Mar172.7 mm (6.8 in)24 March 1967
Apr104.6 mm (4.1 in)17 April 1950
May92.7 mm (3.6 in)6 May 1987
Jun30.5 mm (1.2 in)30 June 1967
Jul22.9 mm (0.9 in)24 July 1964
Aug42.2 mm (1.7 in)15 August 1950
Sep52.1 mm (2.1 in)25 September 1965
Oct82.6 mm (3.3 in)18 October 1985
Nov85.1 mm (3.4 in)10 November 1955
Dec202.7 mm (8.0 in)27 December 1983

Latest Records

20
Latest records at Ukumehame 301
DateStationRecordValueBeat old record byOld record stoodSignificance
21 January 1997Ukumehame 301, USdaily rain96.5 mm (3.8 in)62.0 mm (2.4 in)15 years36 of 100 (Notable)
14 November 1996Ukumehame 301, USdaily rain31.8 mm (1.3 in)28.0 mm (1.1 in)46 years33 of 100 (Routine)
8 November 1996Ukumehame 301, USdaily rain40.6 mm (1.6 in)25.6 mm (1.0 in)48 years33 of 100 (Routine)
28 February 1996Ukumehame 301, USdaily rain37.3 mm (1.5 in)13.4 mm (0.5 in)16 years17 of 100 (Routine)
26 April 1995Ukumehame 301, USdaily rain9.4 mm (0.37 in)7.9 mm (0.31 in)32 years19 of 100 (Routine)
25 April 1995Ukumehame 301, USdaily rain3.8 mm (0.15 in)2.3 mm (0.09 in)46 years20 of 100 (Routine)
3 March 1995Ukumehame 301, USdaily rain8.6 mm (0.34 in)1.7 mm (0.07 in)36 years16 of 100 (Routine)
9 September 1994Ukumehame 301, USdaily rain2.8 mm (0.11 in)1.8 mm (0.07 in)8 years8 of 100 (Routine)
26 October 1993Ukumehame 301, USdaily rain30.7 mm (1.2 in)12.9 mm (0.5 in)46 years27 of 100 (Routine)
9 March 1993Ukumehame 301, USdaily rain10.7 mm (0.4 in)7.4 mm (0.29 in)31 years17 of 100 (Routine)
13 October 1992Ukumehame 301, USdaily rain5.1 mm (0.20 in)0.3 mm (0.01 in)4 years6 of 100 (Routine)
16 September 1992Ukumehame 301, USdaily rain2.8 mm (0.11 in)2.8 mm (0.11 in)50 years20 of 100 (Routine)
23 July 1992Ukumehame 301, USdaily rain2.0 mm (0.08 in)0.2 mm (0.01 in)32 years14 of 100 (Routine)
20 May 1992Ukumehame 301, USdaily rain3.6 mm (0.14 in)1.1 mm (0.04 in)25 years12 of 100 (Routine)
15 January 1992Ukumehame 301, USdaily rain39.4 mm (1.6 in)7.6 mm (0.30 in)12 years11 of 100 (Routine)
16 October 1991Ukumehame 301, USdaily rain74.4 mm (2.9 in)64.7 mm (2.5 in)29 years53 of 100 (Notable)
15 October 1991Ukumehame 301, USdaily rain5.6 mm (0.22 in)2.0 mm (0.08 in)38 years17 of 100 (Routine)
20 September 1991Ukumehame 301, USdaily rain18.5 mm (0.7 in)18.5 mm (0.7 in)48 years20 of 100 (Routine)
11 September 1991Ukumehame 301, USdaily rain (Tie)1.0 mm (0.04 in)tie24 years3 of 100 (Routine)
9 August 1991Ukumehame 301, USdaily rain7.6 mm (0.30 in)6.3 mm (0.25 in)24 years19 of 100 (Routine)

Extremes by Year

1942 to 1999
Yearly extremes at Ukumehame 301: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)202.7 mm (8.0 in)198358.7 mm (2.3 in)58
Wettest five days (Rx5day)298.2 mm (11.7 in)195588.0 mm (3.5 in)58
Longest dry spell (CDD)250 days1976105 days58

Wettest day (Rx1day)

Wettest day (Rx1day) at Ukumehame 301 by year The wettest day of the year at Ukumehame 301, 1942 to 1999. The record is 202.7 mm (8.0 in) in 1983, marked on the chart; the median year is 58.7 mm (2.3 in). 05010015020025019501960197019801990Record: 202.7 mm (8.0 in) in 1983
The wettest day of the year at Ukumehame 301, 1942 to 1999. The record is 202.7 mm (8.0 in) in 1983, marked on the chart; the median year is 58.7 mm (2.3 in).
Wettest day (Rx1day) at Ukumehame 301 by year
YearWettest day (Rx1day)
194237.8 mm (1.5 in)
1943100.3 mm (3.9 in)
194450.5 mm (2.0 in)
194574.9 mm (2.9 in)
194668.3 mm (2.7 in)
194717.8 mm (0.7 in)
194880.0 mm (3.1 in)
194951.3 mm (2.0 in)
1950104.6 mm (4.1 in)
195195.5 mm (3.8 in)
1952122.2 mm (4.8 in)
195351.6 mm (2.0 in)
195451.3 mm (2.0 in)
1955158.8 mm (6.3 in)
1956115.3 mm (4.5 in)
195760.2 mm (2.4 in)
195849.5 mm (1.9 in)
1959114.3 mm (4.5 in)
196056.1 mm (2.2 in)
196173.7 mm (2.9 in)
196276.5 mm (3.0 in)
196350.5 mm (2.0 in)
196448.8 mm (1.9 in)
196581.3 mm (3.2 in)
196653.3 mm (2.1 in)
1967172.7 mm (6.8 in)
196877.5 mm (3.1 in)
196966.0 mm (2.6 in)
197049.5 mm (1.9 in)
197191.4 mm (3.6 in)
197252.1 mm (2.1 in)
197377.2 mm (3.0 in)
197435.8 mm (1.4 in)
197557.2 mm (2.3 in)
197628.4 mm (1.1 in)
197718.5 mm (0.7 in)
197867.3 mm (2.6 in)
197964.8 mm (2.6 in)
1980115.8 mm (4.6 in)
198178.7 mm (3.1 in)
1982136.9 mm (5.4 in)
1983202.7 mm (8.0 in)
198446.0 mm (1.8 in)
198582.6 mm (3.3 in)
198650.3 mm (2.0 in)
198792.7 mm (3.6 in)
198850.8 mm (2.0 in)
198941.7 mm (1.6 in)
199024.9 mm (1.0 in)
199174.4 mm (2.9 in)
199239.4 mm (1.6 in)
199330.7 mm (1.2 in)
199431.8 mm (1.3 in)
199519.1 mm (0.8 in)
199640.6 mm (1.6 in)
199796.5 mm (3.8 in)
199815.2 mm (0.6 in)
19997.6 mm (0.30 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Ukumehame 301 by year The wettest five days of the year at Ukumehame 301, 1942 to 1999. The record is 298.2 mm (11.7 in) in 1955, marked on the chart; the median year is 88.0 mm (3.5 in). 010020030019501960197019801990Record: 298.2 mm (11.7 in) in 1955
The wettest five days of the year at Ukumehame 301, 1942 to 1999. The record is 298.2 mm (11.7 in) in 1955, marked on the chart; the median year is 88.0 mm (3.5 in).
Wettest five days (Rx5day) at Ukumehame 301 by year
YearWettest five days (Rx5day)
194250.8 mm (2.0 in)
1943130.0 mm (5.1 in)
1944115.3 mm (4.5 in)
1945154.9 mm (6.1 in)
194698.3 mm (3.9 in)
194731.0 mm (1.2 in)
1948138.0 mm (5.4 in)
194978.0 mm (3.1 in)
1950162.3 mm (6.4 in)
1951116.9 mm (4.6 in)
1952130.3 mm (5.1 in)
195351.6 mm (2.0 in)
195459.7 mm (2.4 in)
1955298.2 mm (11.7 in)
1956150.1 mm (5.9 in)
195781.8 mm (3.2 in)
195894.5 mm (3.7 in)
1959171.9 mm (6.8 in)
196061.2 mm (2.4 in)
1961205.8 mm (8.1 in)
196299.2 mm (3.9 in)
196391.9 mm (3.6 in)
196488.7 mm (3.5 in)
1965169.5 mm (6.7 in)
196690.2 mm (3.6 in)
1967224.5 mm (8.8 in)
1968115.2 mm (4.5 in)
1969168.9 mm (6.6 in)
197070.5 mm (2.8 in)
1971147.8 mm (5.8 in)
197269.6 mm (2.7 in)
1973138.2 mm (5.4 in)
197469.3 mm (2.7 in)
197568.4 mm (2.7 in)
197659.7 mm (2.4 in)
197735.0 mm (1.4 in)
197876.2 mm (3.0 in)
197987.2 mm (3.4 in)
1980134.6 mm (5.3 in)
198178.7 mm (3.1 in)
1982139.4 mm (5.5 in)
1983202.7 mm (8.0 in)
198446.5 mm (1.8 in)
1985107.7 mm (4.2 in)
198673.4 mm (2.9 in)
198794.0 mm (3.7 in)
198875.2 mm (3.0 in)
198965.8 mm (2.6 in)
199026.9 mm (1.1 in)
199180.0 mm (3.1 in)
199244.2 mm (1.7 in)
199331.4 mm (1.2 in)
199456.4 mm (2.2 in)
199528.9 mm (1.1 in)
199640.6 mm (1.6 in)
1997109.5 mm (4.3 in)
199815.2 mm (0.6 in)
19997.6 mm (0.30 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Ukumehame 301 by year The longest dry spell of the year at Ukumehame 301, 1942 to 1999. The record is 250 days in 1976, marked on the chart; the median year is 105 days. 010020030019501960197019801990Record: 250 days in 1976
The longest dry spell of the year at Ukumehame 301, 1942 to 1999. The record is 250 days in 1976, marked on the chart; the median year is 105 days.
Longest dry spell (CDD) at Ukumehame 301 by year
YearLongest dry spell (CDD)
194274 days
1943104 days
1944120 days
194573 days
194686 days
1947105 days
194887 days
1949123 days
1950107 days
195181 days
1952187 days
1953219 days
1954105 days
1955131 days
1956112 days
195758 days
1958143 days
195977 days
196067 days
1961111 days
1962165 days
1963121 days
196493 days
196556 days
196664 days
196764 days
1968118 days
1969131 days
1970210 days
197174 days
197287 days
1973136 days
197480 days
1975109 days
1976250 days
1977162 days
197883 days
1979167 days
1980197 days
198196 days
198254 days
1983168 days
1984185 days
1985138 days
198674 days
1987164 days
1988120 days
198970 days
1990193 days
199143 days
199263 days
199371 days
199473 days
199595 days
199661 days
199792 days
1998203 days
1999136 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

48 years, 1943 to 1995

A day with at least 64.9 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 215.9 mm (8.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Ukumehame 301: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years64.9 mm (2.6 in)
5 years98.7 mm (3.9 in)
10 years123.5 mm (4.9 in)
25 years157.9 mm (6.2 in)
50 years185.9 mm (7.3 in)Longer than the 48 years of record
100 years215.9 mm (8.5 in)Longer than the 48 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, 48 years of values from 1943 to 1995.

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: 202.7 mm (8.0 in) in 1983; 172.7 mm (6.8 in) in 1967; 158.8 mm (6.3 in) in 1955.

Download the Data

  • Data for Ukumehame 301 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Ukumehame 301 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).