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Waimanalo 794 Weather Records (USC00519521)

Record envelope, standing records and threshold days for Waimanalo 794 (USC00519521), Hawaii, United States, with 63 years of record.

Key Facts for Waimanalo 794

  • Waimanalo 794 (USC00519521) is a weather station in Hawaii, United States at 21.35 latitude and -157.73 longitude, 18 m (59 ft) above sea level.
  • The station reports from 1907 to 1969, 63 years of record.
  • 1,464 records set at Waimanalo 794 still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Waimanalo 794 set a daily record precipitation of 9.1 mm (0.36 in) on 26 June 1969.

About the Station

  • Location: Hawaii, United States, 21.35 latitude, -157.73 longitude.
  • Elevation: 18 m (59 ft).
  • Period of record: 1907 to 1969, 63 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Waimanalo 794, with 2026 drawn through them The band shows the record high and record low for each calendar day at Waimanalo 794. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 10152025303540 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Waimanalo 794. 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 Waimanalo 794, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan31.7 C (89.1 F)11.1 C (52.0 F)n/an/a
Feb31.7 C (89.1 F)11.1 C (52.0 F)n/an/a
Mar31.7 C (89.1 F)12.2 C (54.0 F)n/an/a
Apr33.3 C (91.9 F)12.8 C (55.0 F)n/an/a
May33.9 C (93.0 F)13.9 C (57.0 F)n/an/a
Jun34.4 C (93.9 F)17.2 C (63.0 F)n/an/a
Jul35.6 C (96.1 F)17.8 C (64.0 F)n/an/a
Aug33.3 C (91.9 F)18.3 C (64.9 F)n/an/a
Sep35.0 C (95.0 F)16.7 C (62.1 F)n/an/a
Oct34.4 C (93.9 F)15.6 C (60.1 F)n/an/a
Nov32.2 C (90.0 F)13.3 C (55.9 F)n/an/a
Dec32.2 C (90.0 F)12.2 C (54.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Waimanalo 794 by the year they were set 1,464 records at Waimanalo 794 still stand. 1927 holds the most, with 92. 02550751001907: 401908: 331909: 371910: 351911: 281912: 271913: 311914: 641915: 551916: 431917: 291918: 521919: 321920: 671921: 361922: 251923: 551924: 861925: 641926: 461927: 921928: 241929: 221930: 181931: 261932: 281933: 341934: 761935: 831936: 491937: 221938: 161939: 241940: 311941: 241949: 31950: 71907191119151919192319271931193519391950
1,464 records at Waimanalo 794 still stand. 1927 holds the most, with 92.
Standing records at Waimanalo 794 by the year they were set
Year setStanding records
190740
190833
190937
191035
191128
191227
191331
191464
191555
191643
191729
191852
191932
192067
192136
192225
192355
192486
192564
192646
192792
192824
192922
193018
193126
193228
193334
193476
193583
193649
193722
193816
193924
194031
194124
19493
19507

All-Time Record Progression

2 new records
When Waimanalo 794 set new all-time records 2 all-time records were set at Waimanalo 794 between 23 October 1939 and 20 December 1955. Each dot is a new record. Record daily precipitation23 October 1939: Record daily precipitation 294.4 mm (11.6 in)20 December 1955: Record daily precipitation 327.7 mm (12.9 in)1940194519501955
2 all-time records were set at Waimanalo 794 between 23 October 1939 and 20 December 1955. Each dot is a new record.
When Waimanalo 794 set new all-time records
DateKindDetail
1939-10-23Record daily precipitationRecord daily precipitation 294.4 mm (11.6 in)
1955-12-20Record daily precipitationRecord daily precipitation 327.7 mm (12.9 in)

Wettest Day of Each Month

Dec: 327.7 mm (12.9 in)
Record daily precipitation for each month at Waimanalo 794 The wettest day on record for each calendar month at Waimanalo 794. The most was 327.7 mm (12.9 in) on 20 December 1955. 0100200300400 Jan: 205.2 mm (8.1 in), 18 January 1916 Jan Feb: 133.1 mm (5.2 in), 9 February 1908 Feb Mar: 298.5 mm (11.8 in), 6 March 1958 Mar Apr: 261.4 mm (10.3 in), 22 April 1924 Apr May: 118.9 mm (4.7 in), 28 May 1907 May Jun: 102.9 mm (4.1 in), 3 June 1913 Jun Jul: 52.3 mm (2.1 in), 14 July 1935 Jul Aug: 96.8 mm (3.8 in), 30 August 1930 Aug Sep: 74.9 mm (2.9 in), 9 September 1910 Sep Oct: 294.4 mm (11.6 in), 23 October 1939 Oct Nov: 215.9 mm (8.5 in), 13 November 1965 Nov Dec: 327.7 mm (12.9 in), 20 December 1955 Dec
The wettest day on record for each calendar month at Waimanalo 794. The most was 327.7 mm (12.9 in) on 20 December 1955.
Record daily precipitation for each month at Waimanalo 794
MonthRecord daily precipitation (mm)Date
Jan205.2 mm (8.1 in)18 January 1916
Feb133.1 mm (5.2 in)9 February 1908
Mar298.5 mm (11.8 in)6 March 1958
Apr261.4 mm (10.3 in)22 April 1924
May118.9 mm (4.7 in)28 May 1907
Jun102.9 mm (4.1 in)3 June 1913
Jul52.3 mm (2.1 in)14 July 1935
Aug96.8 mm (3.8 in)30 August 1930
Sep74.9 mm (2.9 in)9 September 1910
Oct294.4 mm (11.6 in)23 October 1939
Nov215.9 mm (8.5 in)13 November 1965
Dec327.7 mm (12.9 in)20 December 1955

Period of Record Coverage

1907 to 1950
Days with data per year at Waimanalo 794 37 years of record at Waimanalo 794, 1907 to 1950. 1 years have data for under 90 percent of days and are left out of rankings: 1949. 1907: 365 of 365 days1908: 366 of 366 days1909: 365 of 365 days1910: 365 of 365 days1911: 353 of 365 days1912: 366 of 366 days1913: 365 of 365 days1914: 364 of 365 days1915: 365 of 365 days1916: 366 of 366 days1917: 365 of 365 days1918: 365 of 365 days1919: 365 of 365 days1920: 366 of 366 days1921: 334 of 365 days1922: 365 of 365 days1923: 364 of 365 days1924: 364 of 366 days1925: 334 of 365 days1926: 334 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 349 of 365 days1938: 364 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1949: 92 of 365 days1950: 345 of 365 days19101915192019251930193519401950
37 years of record at Waimanalo 794, 1907 to 1950. 1 years have data for under 90 percent of days and are left out of rankings: 1949.
Days with data per year at Waimanalo 794
YearDays with dataShare of yearComplete
1907365100%Yes
1908366100%Yes
1909365100%Yes
1910365100%Yes
191135397%Yes
1912366100%Yes
1913365100%Yes
1914364100%Yes
1915365100%Yes
1916366100%Yes
1917365100%Yes
1918365100%Yes
1919365100%Yes
1920366100%Yes
192133492%Yes
1922365100%Yes
1923364100%Yes
192436499%Yes
192533492%Yes
192633492%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
193734996%Yes
1938364100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
19499225%No
195034595%Yes

Latest Records

20
Latest records at Waimanalo 794
DateStationRecordValueBeat old record byOld record stoodSignificance
26 June 1969Waimanalo 794, USdaily rain9.1 mm (0.36 in)0.7 mm (0.03 in)0 years7 of 100 (Routine)
10 June 1969Waimanalo 794, USdaily rain10.2 mm (0.4 in)4.9 mm (0.19 in)56 years20 of 100 (Routine)
6 May 1969Waimanalo 794, USdaily rain37.8 mm (1.5 in)7.8 mm (0.31 in)7 years13 of 100 (Routine)
2 February 1969Waimanalo 794, USdaily rain119.4 mm (4.7 in)14.0 mm (0.6 in)62 years32 of 100 (Routine)
5 January 1969Waimanalo 794, USdaily rain63.5 mm (2.5 in)43.9 mm (1.7 in)1 year24 of 100 (Routine)
3 January 1969Waimanalo 794, USdaily rain94.0 mm (3.7 in)54.9 mm (2.2 in)39 years40 of 100 (Notable)
30 November 1968Waimanalo 794, USdaily rain94.0 mm (3.7 in)69.9 mm (2.8 in)12 years49 of 100 (Notable)
14 November 1968Waimanalo 794, USdaily rain27.4 mm (1.1 in)0.7 mm (0.03 in)4 years7 of 100 (Routine)
18 October 1968Waimanalo 794, USdaily rain17.0 mm (0.7 in)6.3 mm (0.25 in)28 years17 of 100 (Routine)
3 October 1968Waimanalo 794, USdaily rain (Tie)7.6 mm (0.30 in)tie43 years4 of 100 (Routine)
2 October 1968Waimanalo 794, USdaily rain27.2 mm (1.1 in)4.1 mm (0.16 in)38 years19 of 100 (Routine)
23 July 1968Waimanalo 794, USdaily rain7.9 mm (0.31 in)1.3 mm (0.05 in)37 years19 of 100 (Routine)
26 June 1968Waimanalo 794, USdaily rain8.4 mm (0.33 in)4.6 mm (0.18 in)52 years20 of 100 (Routine)
10 May 1968Waimanalo 794, USdaily rain66.0 mm (2.6 in)30.4 mm (1.2 in)52 years43 of 100 (Notable)
8 May 1968Waimanalo 794, USdaily rain7.4 mm (0.29 in)1.6 mm (0.06 in)6 years8 of 100 (Routine)
14 March 1968Waimanalo 794, USdaily rain81.3 mm (3.2 in)18.8 mm (0.7 in)55 years29 of 100 (Routine)
27 January 1968Waimanalo 794, USdaily rain50.0 mm (2.0 in)9.9 mm (0.39 in)33 years20 of 100 (Routine)
5 January 1968Waimanalo 794, USdaily rain19.6 mm (0.8 in)2.1 mm (0.08 in)49 years20 of 100 (Routine)
10 December 1967Waimanalo 794, USdaily rain160.0 mm (6.3 in)121.9 mm (4.8 in)2 years46 of 100 (Notable)
9 December 1967Waimanalo 794, USdaily rain63.5 mm (2.5 in)35.8 mm (1.4 in)49 years35 of 100 (Notable)

Climate Trend

31 complete years, 1907 to 1950
Annual mean temperature at Waimanalo 794 as warming stripes, 1907 to 1950 One stripe for each of 31 complete years at Waimanalo 794, 1907 to 1950. Blue stripes are years cooler than the station's own mean of 24.2 C (75.5 F); red stripes are warmer. The coolest year was 1927, at 22.9 C (73.1 F), and the warmest was 1934, at 25.1 C (77.2 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1907: 24.6 C, +0.4 C from the station mean1908: 24.4 C, +0.2 C from the station mean1909: 24.0 C, -0.2 C from the station mean1910: 23.9 C, -0.3 C from the station mean1912: 24.5 C, +0.3 C from the station mean1913: 24.7 C, +0.5 C from the station mean1914: 24.1 C, 0.0 C from the station mean1915: 24.5 C, +0.3 C from the station mean1916: 24.4 C, +0.2 C from the station mean1917: 24.4 C, +0.2 C from the station mean1918: 24.1 C, -0.1 C from the station mean1919: 24.4 C, +0.2 C from the station mean1920: 24.4 C, +0.2 C from the station mean1922: 24.5 C, +0.3 C from the station mean1923: 23.7 C, -0.5 C from the station mean1924: 23.3 C, -0.9 C from the station mean1927: 22.9 C, -1.3 C from the station mean1928: 23.8 C, -0.3 C from the station mean1929: 24.1 C, -0.1 C from the station mean1930: 24.1 C, -0.1 C from the station mean1931: 23.8 C, -0.4 C from the station mean1932: 24.2 C, 0.0 C from the station mean1933: 23.6 C, -0.6 C from the station mean1934: 25.1 C, +0.9 C from the station mean1935: 25.0 C, +0.8 C from the station mean1936: 24.8 C, +0.6 C from the station mean1938: 24.2 C, 0.0 C from the station mean1939: 24.0 C, -0.2 C from the station mean1940: 24.3 C, +0.1 C from the station mean1941: 24.3 C, +0.1 C from the station mean1950: 24.0 C, -0.2 C from the station mean1907191019151920192519301935194019451950
One stripe for each of 31 complete years at Waimanalo 794, 1907 to 1950. Blue stripes are years cooler than the station's own mean of 24.2 C (75.5 F); red stripes are warmer. The coolest year was 1927, at 22.9 C (73.1 F), and the warmest was 1934, at 25.1 C (77.2 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Waimanalo 794 as warming stripes, 1907 to 1950
YearAnnual mean temperatureDifference from the station mean
190724.6 C+0.36 C
190824.4 C+0.24 C
190924.0 C-0.17 C
191023.9 C-0.27 C
191224.5 C+0.30 C
191324.7 C+0.47 C
191424.1 C-0.05 C
191524.5 C+0.29 C
191624.4 C+0.19 C
191724.4 C+0.19 C
191824.1 C-0.10 C
191924.4 C+0.21 C
192024.4 C+0.20 C
192224.5 C+0.29 C
192323.7 C-0.47 C
192423.3 C-0.88 C
192722.9 C-1.34 C
192823.8 C-0.35 C
192924.1 C-0.07 C
193024.1 C-0.12 C
193123.8 C-0.38 C
193224.2 C-0.01 C
193323.6 C-0.63 C
193425.1 C+0.90 C
193525.0 C+0.79 C
193624.8 C+0.61 C
193824.2 C-0.04 C
193924.0 C-0.20 C
194024.3 C+0.14 C
194124.3 C+0.06 C
195024.0 C-0.23 C

The fitted trend in annual mean temperature here over 1907 to 1950 is -0.04 C (-0.19 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Waimanalo 794
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.04 C (-0.19 to 0.12) per decade-0.1 F (-0.3 to 0.2) per decade1907 to 195031Not clearly different from zero
Mean daily maximum-0.02 C (-0.26 to 0.22) per decade-0.04 F (-0.47 to 0.39) per decade1907 to 195031Not clearly different from zero
Mean daily minimum-0.1 C (-0.2 to 0.1) per decade-0.1 F (-0.3 to 0.1) per decade1907 to 195031Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1907 to 1969
Yearly extremes at Waimanalo 794: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.6 C (96.1 F)190732.2 C (90.0 F)37
Coldest night (TNn)11.1 C (52.0 F)191513.3 C (55.9 F)37
Wettest day (Rx1day)327.7 mm (12.9 in)1955103.8 mm (4.1 in)52
Wettest five days (Rx5day)460.3 mm (18.1 in)1958193.1 mm (7.6 in)52
Longest dry spell (CDD)39 days191818 days52

Hottest day (TXx)

Hottest day (TXx) at Waimanalo 794 by year The hottest day of the year at Waimanalo 794, 1907 to 1969. The record is 35.6 C (96.1 F) in 1907, marked on the chart; the median year is 32.2 C (90.0 F). 2830323436192019401960Record: 35.6 C (96.1 F) in 1907
The hottest day of the year at Waimanalo 794, 1907 to 1969. The record is 35.6 C (96.1 F) in 1907, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Waimanalo 794 by year
YearHottest day (TXx)
190735.6 C (96.1 F)
190832.2 C (90.0 F)
190931.7 C (89.1 F)
191033.3 C (91.9 F)
191131.7 C (89.1 F)
191231.7 C (89.1 F)
191333.9 C (93.0 F)
191433.9 C (93.0 F)
191532.8 C (91.0 F)
191631.7 C (89.1 F)
191732.2 C (90.0 F)
191833.3 C (91.9 F)
191934.4 C (93.9 F)
192033.3 C (91.9 F)
192133.3 C (91.9 F)
192232.8 C (91.0 F)
192332.2 C (90.0 F)
192432.2 C (90.0 F)
192533.3 C (91.9 F)
192629.4 C (84.9 F)
192730.6 C (87.1 F)
192830.0 C (86.0 F)
192932.2 C (90.0 F)
193031.7 C (89.1 F)
193130.6 C (87.1 F)
193231.1 C (88.0 F)
193330.6 C (87.1 F)
193433.3 C (91.9 F)
193533.9 C (93.0 F)
193634.4 C (93.9 F)
193731.1 C (88.0 F)
193832.2 C (90.0 F)
193931.7 C (89.1 F)
194031.1 C (88.0 F)
194131.7 C (89.1 F)
194931.7 C (89.1 F)
195030.0 C (86.0 F)
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a

Coldest night (TNn)

Coldest night (TNn) at Waimanalo 794 by year The coldest night of the year at Waimanalo 794, 1907 to 1969. The record is 11.1 C (52.0 F) in 1915, marked on the chart; the median year is 13.3 C (55.9 F). 10121416192019401960Record: 11.1 C (52.0 F) in 1915
The coldest night of the year at Waimanalo 794, 1907 to 1969. The record is 11.1 C (52.0 F) in 1915, marked on the chart; the median year is 13.3 C (55.9 F).
Coldest night (TNn) at Waimanalo 794 by year
YearColdest night (TNn)
190715.6 C (60.1 F)
190815.6 C (60.1 F)
190913.9 C (57.0 F)
191012.8 C (55.0 F)
191113.9 C (57.0 F)
191214.4 C (57.9 F)
191314.4 C (57.9 F)
191413.3 C (55.9 F)
191511.1 C (52.0 F)
191613.3 C (55.9 F)
191713.3 C (55.9 F)
191814.4 C (57.9 F)
191913.9 C (57.0 F)
192012.2 C (54.0 F)
192113.3 C (55.9 F)
192213.3 C (55.9 F)
192312.8 C (55.0 F)
192412.8 C (55.0 F)
192512.8 C (55.0 F)
192613.3 C (55.9 F)
192712.8 C (55.0 F)
192814.4 C (57.9 F)
192912.8 C (55.0 F)
193012.2 C (54.0 F)
193112.8 C (55.0 F)
193213.9 C (57.0 F)
193312.8 C (55.0 F)
193414.4 C (57.9 F)
193513.9 C (57.0 F)
193613.3 C (55.9 F)
193713.3 C (55.9 F)
193813.9 C (57.0 F)
193914.4 C (57.9 F)
194011.1 C (52.0 F)
194113.3 C (55.9 F)
194913.3 C (55.9 F)
195013.9 C (57.0 F)
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Waimanalo 794 by year The wettest day of the year at Waimanalo 794, 1907 to 1969. The record is 327.7 mm (12.9 in) in 1955, marked on the chart; the median year is 103.8 mm (4.1 in). 0100200300400192019401960Record: 327.7 mm (12.9 in) in 1955
The wettest day of the year at Waimanalo 794, 1907 to 1969. The record is 327.7 mm (12.9 in) in 1955, marked on the chart; the median year is 103.8 mm (4.1 in).
Wettest day (Rx1day) at Waimanalo 794 by year
YearWettest day (Rx1day)
1907144.0 mm (5.7 in)
1908216.4 mm (8.5 in)
190978.7 mm (3.1 in)
191074.9 mm (2.9 in)
1911104.6 mm (4.1 in)
191253.3 mm (2.1 in)
1913102.9 mm (4.1 in)
1914148.8 mm (5.9 in)
1915113.0 mm (4.4 in)
1916205.2 mm (8.1 in)
1917139.7 mm (5.5 in)
1918192.3 mm (7.6 in)
191945.7 mm (1.8 in)
1920109.2 mm (4.3 in)
192195.5 mm (3.8 in)
192260.2 mm (2.4 in)
1923152.4 mm (6.0 in)
1924261.4 mm (10.3 in)
192556.1 mm (2.2 in)
192649.0 mm (1.9 in)
1927116.6 mm (4.6 in)
192853.8 mm (2.1 in)
192983.6 mm (3.3 in)
1930108.2 mm (4.3 in)
193165.0 mm (2.6 in)
1932101.3 mm (4.0 in)
1933131.8 mm (5.2 in)
193445.2 mm (1.8 in)
1935111.0 mm (4.4 in)
1936185.7 mm (7.3 in)
1937165.1 mm (6.5 in)
193899.3 mm (3.9 in)
1939294.4 mm (11.6 in)
194088.6 mm (3.5 in)
194182.8 mm (3.3 in)
194950.8 mm (2.0 in)
1950137.9 mm (5.4 in)
1955327.7 mm (12.9 in)
195686.4 mm (3.4 in)
1957149.9 mm (5.9 in)
1958298.5 mm (11.8 in)
195988.9 mm (3.5 in)
196053.3 mm (2.1 in)
196181.3 mm (3.2 in)
196249.8 mm (2.0 in)
1963157.5 mm (6.2 in)
1964101.6 mm (4.0 in)
1965215.9 mm (8.5 in)
1966102.1 mm (4.0 in)
1967160.0 mm (6.3 in)
196894.0 mm (3.7 in)
1969119.4 mm (4.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Waimanalo 794 by year The wettest five days of the year at Waimanalo 794, 1907 to 1969. The record is 460.3 mm (18.1 in) in 1958, marked on the chart; the median year is 193.1 mm (7.6 in). 0200400600192019401960Record: 460.3 mm (18.1 in) in 1958
The wettest five days of the year at Waimanalo 794, 1907 to 1969. The record is 460.3 mm (18.1 in) in 1958, marked on the chart; the median year is 193.1 mm (7.6 in).
Wettest five days (Rx5day) at Waimanalo 794 by year
YearWettest five days (Rx5day)
1907248.4 mm (9.8 in)
1908289.7 mm (11.4 in)
1909110.5 mm (4.4 in)
1910119.8 mm (4.7 in)
1911211.8 mm (8.3 in)
191294.8 mm (3.7 in)
1913121.7 mm (4.8 in)
1914217.6 mm (8.6 in)
1915254.5 mm (10.0 in)
1916409.9 mm (16.1 in)
1917228.0 mm (9.0 in)
1918288.0 mm (11.3 in)
191961.0 mm (2.4 in)
1920241.3 mm (9.5 in)
1921205.1 mm (8.1 in)
192283.3 mm (3.3 in)
1923367.4 mm (14.5 in)
1924282.4 mm (11.1 in)
1925106.9 mm (4.2 in)
192681.3 mm (3.2 in)
1927190.7 mm (7.5 in)
1928134.1 mm (5.3 in)
1929144.8 mm (5.7 in)
1930175.7 mm (6.9 in)
1931101.8 mm (4.0 in)
1932134.3 mm (5.3 in)
1933283.1 mm (11.1 in)
193482.8 mm (3.3 in)
1935183.7 mm (7.2 in)
1936251.2 mm (9.9 in)
1937191.6 mm (7.5 in)
1938208.6 mm (8.2 in)
1939350.0 mm (13.8 in)
1940109.0 mm (4.3 in)
1941171.7 mm (6.8 in)
194953.7 mm (2.1 in)
1950201.2 mm (7.9 in)
1955452.7 mm (17.8 in)
1956120.9 mm (4.8 in)
1957288.3 mm (11.4 in)
1958460.3 mm (18.1 in)
1959106.9 mm (4.2 in)
1960103.3 mm (4.1 in)
1961216.9 mm (8.5 in)
1962136.9 mm (5.4 in)
1963284.5 mm (11.2 in)
1964166.8 mm (6.6 in)
1965370.6 mm (14.6 in)
1966269.0 mm (10.6 in)
1967246.1 mm (9.7 in)
1968164.1 mm (6.5 in)
1969194.6 mm (7.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Waimanalo 794 by year The longest dry spell of the year at Waimanalo 794, 1907 to 1969. The record is 39 days in 1918, marked on the chart; the median year is 18 days. 010203040192019401960Record: 39 days in 1918
The longest dry spell of the year at Waimanalo 794, 1907 to 1969. The record is 39 days in 1918, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Waimanalo 794 by year
YearLongest dry spell (CDD)
190713 days
190819 days
190912 days
191013 days
191113 days
191220 days
191314 days
191424 days
191516 days
191626 days
191724 days
191839 days
191923 days
192018 days
192129 days
192219 days
192324 days
192424 days
192514 days
192622 days
192714 days
192820 days
192928 days
193020 days
193118 days
193224 days
193317 days
193412 days
193512 days
193613 days
193711 days
193812 days
193922 days
194016 days
194115 days
19498 days
195023 days
195517 days
195617 days
195711 days
195811 days
195926 days
196012 days
196129 days
196219 days
196324 days
196420 days
196510 days
196617 days
196715 days
196826 days
196915 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

46 years, 1907 to 1968

A day with at least 106.8 mm (4.2 in) of rain is expected about once in 2 years. A day with at least 359.4 mm (14.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Waimanalo 794: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years106.8 mm (4.2 in)
5 years162.0 mm (6.4 in)
10 years203.1 mm (8.0 in)
25 years260.8 mm (10.3 in)
50 years308.1 mm (12.1 in)Longer than the 46 years of record
100 years359.4 mm (14.1 in)Longer than the 46 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, 46 years of values from 1907 to 1968.

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: 298.5 mm (11.8 in) in 1958; 294.4 mm (11.6 in) in 1939; 261.4 mm (10.3 in) in 1924.

Download the Data

  • Data for Waimanalo 794 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Waimanalo 794 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). Records are computed by this site and are not official.

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