Daily records
Page built 2026-10-15
Data as of 2025-12-31
Search
Built 2026-10-15 (15 October 2026)

Haiku 490 Weather Records (USC00510832)

Record envelope, standing records and threshold days for Haiku 490 (USC00510832), Hawaii, United States, with 47 years of record.

Key Facts for Haiku 490

  • Haiku 490 (USC00510832) is a weather station in Hawaii, United States at 20.92 latitude and -156.32 longitude, 149 m (489 ft) above sea level.
  • The station reports from 1905 to 1951, 47 years of record.
  • 1,464 records set at Haiku 490 still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Haiku 490 tied a daily record low maximum temperature of 21.7 C (71.1 F) on 12 December 1951.

About the Station

  • Location: Hawaii, United States, 20.92 latitude, -156.32 longitude.
  • Elevation: 149 m (489 ft).
  • Period of record: 1905 to 1951, 47 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 Haiku 490, with 2026 drawn through them The band shows the record high and record low for each calendar day at Haiku 490. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 101520253035 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Haiku 490. 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 Haiku 490, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan31.7 C (89.1 F)10.6 C (51.1 F)n/an/a
Feb31.1 C (88.0 F)11.7 C (53.1 F)n/an/a
Mar32.8 C (91.0 F)10.0 C (50.0 F)n/an/a
Apr31.1 C (88.0 F)12.8 C (55.0 F)n/an/a
May31.1 C (88.0 F)12.8 C (55.0 F)n/an/a
Jun33.3 C (91.9 F)13.9 C (57.0 F)n/an/a
Jul34.4 C (93.9 F)15.6 C (60.1 F)n/an/a
Aug34.4 C (93.9 F)15.6 C (60.1 F)n/an/a
Sep33.9 C (93.0 F)15.0 C (59.0 F)n/an/a
Oct34.4 C (93.9 F)13.3 C (55.9 F)n/an/a
Nov33.9 C (93.0 F)14.4 C (57.9 F)n/an/a
Dec32.2 C (90.0 F)11.1 C (52.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Haiku 490 by the year they were set 1,464 records at Haiku 490 still stand. 1932 holds the most, with 106. 0501001501905: 451906: 281907: 431908: 311909: 331910: 501911: 371912: 241913: 181914: 811915: 491916: 291917: 181918: 331919: 121920: 201921: 261922: 191923: 361924: 401925: 121926: 181927: 591928: 161929: 821930: 321931: 551932: 1061933: 471934: 231935: 211936: 441937: 631938: 341939: 11940: 671941: 121942: 251943: 51944: 21945: 151946: 31947: 71948: 131949: 31950: 101951: 171905191019151920192519301935194019451950
1,464 records at Haiku 490 still stand. 1932 holds the most, with 106.
Standing records at Haiku 490 by the year they were set
Year setStanding records
190545
190628
190743
190831
190933
191050
191137
191224
191318
191481
191549
191629
191718
191833
191912
192020
192126
192219
192336
192440
192512
192618
192759
192816
192982
193032
193155
1932106
193347
193423
193521
193644
193763
193834
19391
194067
194112
194225
19435
19442
194515
19463
19477
194813
19493
195010
195117

All-Time Record Progression

1 new records
When Haiku 490 set new all-time records 1 all-time records were set at Haiku 490 between 22 September 1937 and 22 September 1937. Each dot is a new record. Record high minimum temperature22 September 1937: Record high minimum temperature 26.1 C (79.0 F)
1 all-time records were set at Haiku 490 between 22 September 1937 and 22 September 1937. Each dot is a new record.
When Haiku 490 set new all-time records
DateKindDetail
1937-09-22Record high minimum temperatureRecord high minimum temperature 26.1 C (79.0 F)

Wettest Day of Each Month

Nov: 198.4 mm (7.8 in)
Record daily precipitation for each month at Haiku 490 The wettest day on record for each calendar month at Haiku 490. The most was 198.4 mm (7.8 in) on 19 November 1930. 050100150200 Jan: 160.0 mm (6.3 in), 31 January 1922 Jan Feb: 148.6 mm (5.9 in), 14 February 1932 Feb Mar: 124.5 mm (4.9 in), 12 March 1935 Mar Apr: 147.6 mm (5.8 in), 10 April 1918 Apr May: 127.0 mm (5.0 in), 1 May 1932 May Jun: 54.6 mm (2.1 in), 30 June 1925 Jun Jul: 102.1 mm (4.0 in), 27 July 1925 Jul Aug: 118.1 mm (4.6 in), 7 August 1906 Aug Sep: 52.3 mm (2.1 in), 7 September 1906 Sep Oct: 112.0 mm (4.4 in), 24 October 1941 Oct Nov: 198.4 mm (7.8 in), 19 November 1930 Nov Dec: 128.5 mm (5.1 in), 22 December 1906 Dec
The wettest day on record for each calendar month at Haiku 490. The most was 198.4 mm (7.8 in) on 19 November 1930.
Record daily precipitation for each month at Haiku 490
MonthRecord daily precipitation (mm)Date
Jan160.0 mm (6.3 in)31 January 1922
Feb148.6 mm (5.9 in)14 February 1932
Mar124.5 mm (4.9 in)12 March 1935
Apr147.6 mm (5.8 in)10 April 1918
May127.0 mm (5.0 in)1 May 1932
Jun54.6 mm (2.1 in)30 June 1925
Jul102.1 mm (4.0 in)27 July 1925
Aug118.1 mm (4.6 in)7 August 1906
Sep52.3 mm (2.1 in)7 September 1906
Oct112.0 mm (4.4 in)24 October 1941
Nov198.4 mm (7.8 in)19 November 1930
Dec128.5 mm (5.1 in)22 December 1906

Period of Record Coverage

1905 to 1951
Days with data per year at Haiku 490 47 years of record at Haiku 490, 1905 to 1951. 11 years have data for under 90 percent of days and are left out of rankings: 1909, 1911, 1916, 1919, 1926, 1940, 1947, 1948 and others. 1905: 365 of 365 days1906: 365 of 365 days1907: 357 of 365 days1908: 345 of 366 days1909: 295 of 365 days1910: 348 of 365 days1911: 264 of 365 days1912: 358 of 366 days1913: 365 of 365 days1914: 361 of 365 days1915: 365 of 365 days1916: 307 of 366 days1917: 364 of 365 days1918: 357 of 365 days1919: 177 of 365 days1920: 358 of 366 days1921: 347 of 365 days1922: 364 of 365 days1923: 364 of 365 days1924: 366 of 366 days1925: 330 of 365 days1926: 258 of 365 days1927: 329 of 365 days1928: 355 of 366 days1929: 346 of 365 days1930: 365 of 365 days1931: 356 of 365 days1932: 363 of 366 days1933: 356 of 365 days1934: 364 of 365 days1935: 360 of 365 days1936: 364 of 366 days1937: 363 of 365 days1938: 355 of 365 days1939: 365 of 365 days1940: 303 of 366 days1941: 363 of 365 days1942: 364 of 365 days1943: 364 of 365 days1944: 366 of 366 days1945: 347 of 365 days1946: 364 of 365 days1947: 157 of 365 days1948: 237 of 366 days1949: 210 of 365 days1950: 252 of 365 days1951: 260 of 365 days19101920193019401950
47 years of record at Haiku 490, 1905 to 1951. 11 years have data for under 90 percent of days and are left out of rankings: 1909, 1911, 1916, 1919, 1926, 1940, 1947, 1948 and others.
Days with data per year at Haiku 490
YearDays with dataShare of yearComplete
1905365100%Yes
1906365100%Yes
190735798%Yes
190834594%Yes
190929581%No
191034895%Yes
191126472%No
191235898%Yes
1913365100%Yes
191436199%Yes
1915365100%Yes
191630784%No
1917364100%Yes
191835798%Yes
191917748%No
192035898%Yes
192134795%Yes
1922364100%Yes
1923364100%Yes
1924366100%Yes
192533090%Yes
192625871%No
192732990%Yes
192835597%Yes
192934695%Yes
1930365100%Yes
193135698%Yes
193236399%Yes
193335698%Yes
1934364100%Yes
193536099%Yes
193636499%Yes
193736399%Yes
193835597%Yes
1939365100%Yes
194030383%No
194136399%Yes
1942364100%Yes
1943364100%Yes
1944366100%Yes
194534795%Yes
1946364100%Yes
194715743%No
194823765%No
194921058%No
195025269%No
195126071%No

Latest Records

20
Latest records at Haiku 490
DateStationRecordValueBeat old record byOld record stoodSignificance
12 December 1951Haiku 490, USdaily low max (Tie)21.7 C (71.1 F)tie36 years3 of 100 (Routine)
11 December 1951Haiku 490, USdaily rain80.8 mm (3.2 in)70.1 mm (2.8 in)12 years47 of 100 (Notable)
6 December 1951Haiku 490, USdaily high min20.6 C (69.1 F)0.6 C (1.1 F)20 years14 of 100 (Routine)
31 October 1951Haiku 490, USdaily rain31.2 mm (1.2 in)5.3 mm (0.21 in)36 years20 of 100 (Routine)
26 October 1951Haiku 490, USdaily high min (Tie)21.7 C (71.1 F)tie20 years2 of 100 (Routine)
19 October 1951Haiku 490, USdaily high min (Tie)21.7 C (71.1 F)tie20 years2 of 100 (Routine)
18 October 1951Haiku 490, USdaily high min (Tie)21.1 C (70.0 F)tie20 years2 of 100 (Routine)
17 September 1951Haiku 490, USdaily high max31.1 C (88.0 F)1.1 C (2.0 F)33 years21 of 100 (Routine)
7 September 1951Haiku 490, USdaily high min (Tie)21.7 C (71.1 F)tie24 years2 of 100 (Routine)
4 September 1951Haiku 490, USdaily high max (Tie)31.1 C (88.0 F)tie41 years4 of 100 (Routine)
30 August 1951Haiku 490, USdaily high max (Tie)29.4 C (84.9 F)tie30 years3 of 100 (Routine)
20 August 1951Haiku 490, USdaily high max31.7 C (89.1 F)1.1 C (2.0 F)24 years19 of 100 (Routine)
7 August 1951Haiku 490, USdaily high max29.4 C (84.9 F)1.1 C (2.0 F)28 years20 of 100 (Routine)
6 August 1951Haiku 490, USdaily low min16.7 C (62.1 F)2.2 C (4.0 F)45 years37 of 100 (Notable)
28 July 1951Haiku 490, USdaily low min17.2 C (63.0 F)1.7 C (3.1 F)33 years30 of 100 (Routine)
25 July 1951Haiku 490, USdaily high min (Tie)22.2 C (72.0 F)tie20 years2 of 100 (Routine)
24 July 1951Haiku 490, USdaily high min (Tie)22.2 C (72.0 F)tie24 years2 of 100 (Routine)
23 July 1951Haiku 490, USdaily high min (Tie)21.7 C (71.1 F)tie21 years2 of 100 (Routine)
22 July 1951Haiku 490, USdaily low min16.7 C (62.1 F)1.6 C (2.9 F)28 years27 of 100 (Routine)
21 July 1951Haiku 490, USdaily low min16.7 C (62.1 F)2.2 C (4.0 F)36 years36 of 100 (Notable)

Climate Trend

29 complete years, 1905 to 1946
Annual mean temperature at Haiku 490 as warming stripes, 1905 to 1946 One stripe for each of 29 complete years at Haiku 490, 1905 to 1946. Blue stripes are years cooler than the station's own mean of 22.4 C (72.3 F); red stripes are warmer. The coolest year was 1914, at 21.3 C (70.3 F), and the warmest was 1931, at 23.3 C (73.9 F). The strongest colour marks a difference of 1.2 C (2.2 F). 1905: 21.9 C, -0.5 C from the station mean1906: 22.2 C, -0.2 C from the station mean1907: 22.1 C, -0.3 C from the station mean1910: 21.3 C, -1.1 C from the station mean1912: 21.7 C, -0.7 C from the station mean1913: 21.8 C, -0.6 C from the station mean1914: 21.3 C, -1.1 C from the station mean1915: 21.7 C, -0.7 C from the station mean1917: 22.0 C, -0.4 C from the station mean1918: 21.4 C, -1.0 C from the station mean1920: 23.0 C, +0.6 C from the station mean1922: 22.3 C, -0.1 C from the station mean1923: 22.4 C, 0.0 C from the station mean1924: 22.3 C, -0.1 C from the station mean1928: 22.5 C, +0.1 C from the station mean1930: 22.9 C, +0.5 C from the station mean1931: 23.3 C, +0.9 C from the station mean1932: 22.4 C, 0.0 C from the station mean1934: 23.0 C, +0.6 C from the station mean1935: 22.8 C, +0.4 C from the station mean1936: 23.2 C, +0.8 C from the station mean1937: 23.1 C, +0.7 C from the station mean1938: 22.7 C, +0.3 C from the station mean1939: 22.3 C, -0.1 C from the station mean1941: 22.8 C, +0.4 C from the station mean1942: 23.0 C, +0.6 C from the station mean1943: 23.0 C, +0.6 C from the station mean1944: 22.6 C, +0.2 C from the station mean1946: 22.8 C, +0.4 C from the station mean190519101915192019251930193519401945
One stripe for each of 29 complete years at Haiku 490, 1905 to 1946. Blue stripes are years cooler than the station's own mean of 22.4 C (72.3 F); red stripes are warmer. The coolest year was 1914, at 21.3 C (70.3 F), and the warmest was 1931, at 23.3 C (73.9 F). The strongest colour marks a difference of 1.2 C (2.2 F).
Annual mean temperature at Haiku 490 as warming stripes, 1905 to 1946
YearAnnual mean temperatureDifference from the station mean
190521.9 C-0.51 C
190622.2 C-0.18 C
190722.1 C-0.32 C
191021.3 C-1.10 C
191221.7 C-0.69 C
191321.8 C-0.58 C
191421.3 C-1.12 C
191521.7 C-0.72 C
191722.0 C-0.40 C
191821.4 C-1.01 C
192023.0 C+0.62 C
192222.3 C-0.06 C
192322.4 C-0.03 C
192422.3 C-0.10 C
192822.5 C+0.11 C
193022.9 C+0.50 C
193123.3 C+0.85 C
193222.4 C+0.01 C
193423.0 C+0.63 C
193522.8 C+0.36 C
193623.2 C+0.76 C
193723.1 C+0.65 C
193822.7 C+0.29 C
193922.3 C-0.09 C
194122.8 C+0.40 C
194223.0 C+0.61 C
194323.0 C+0.55 C
194422.6 C+0.17 C
194622.8 C+0.37 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1905 to 1951
Yearly extremes at Haiku 490: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)34.4 C (93.9 F)192630.6 C (87.1 F)47
Coldest night (TNn)10.0 C (50.0 F)193213.9 C (57.0 F)47
Wettest day (Rx1day)198.4 mm (7.8 in)193080.8 mm (3.2 in)47
Wettest five days (Rx5day)344.7 mm (13.6 in)1922148.7 mm (5.9 in)47
Longest dry spell (CDD)47 days192012 days47

Hottest day (TXx)

Hottest day (TXx) at Haiku 490 by year The hottest day of the year at Haiku 490, 1905 to 1951. The record is 34.4 C (93.9 F) in 1926, marked on the chart; the median year is 30.6 C (87.1 F). 283032343619101920193019401950Record: 34.4 C (93.9 F) in 1926
The hottest day of the year at Haiku 490, 1905 to 1951. The record is 34.4 C (93.9 F) in 1926, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Haiku 490 by year
YearHottest day (TXx)
190531.7 C (89.1 F)
190630.0 C (86.0 F)
190731.1 C (88.0 F)
190831.1 C (88.0 F)
190931.1 C (88.0 F)
191030.6 C (87.1 F)
191128.3 C (82.9 F)
191230.0 C (86.0 F)
191328.9 C (84.0 F)
191428.3 C (82.9 F)
191529.4 C (84.9 F)
191628.3 C (82.9 F)
191730.6 C (87.1 F)
191829.4 C (84.9 F)
191928.9 C (84.0 F)
192030.0 C (86.0 F)
192130.6 C (87.1 F)
192230.0 C (86.0 F)
192330.6 C (87.1 F)
192430.6 C (87.1 F)
192531.1 C (88.0 F)
192634.4 C (93.9 F)
192731.7 C (89.1 F)
192831.1 C (88.0 F)
192932.2 C (90.0 F)
193030.0 C (86.0 F)
193134.4 C (93.9 F)
193233.3 C (91.9 F)
193333.9 C (93.0 F)
193432.2 C (90.0 F)
193531.7 C (89.1 F)
193633.9 C (93.0 F)
193734.4 C (93.9 F)
193831.1 C (88.0 F)
193930.6 C (87.1 F)
194031.7 C (89.1 F)
194131.1 C (88.0 F)
194231.7 C (89.1 F)
194330.0 C (86.0 F)
194430.6 C (87.1 F)
194530.0 C (86.0 F)
194629.4 C (84.9 F)
194730.0 C (86.0 F)
194830.0 C (86.0 F)
194930.0 C (86.0 F)
195031.7 C (89.1 F)
195131.7 C (89.1 F)

Coldest night (TNn)

Coldest night (TNn) at Haiku 490 by year The coldest night of the year at Haiku 490, 1905 to 1951. The record is 10.0 C (50.0 F) in 1932, marked on the chart; the median year is 13.9 C (57.0 F). 101214161819101920193019401950Record: 10.0 C (50.0 F) in 1932
The coldest night of the year at Haiku 490, 1905 to 1951. The record is 10.0 C (50.0 F) in 1932, marked on the chart; the median year is 13.9 C (57.0 F).
Coldest night (TNn) at Haiku 490 by year
YearColdest night (TNn)
190512.8 C (55.0 F)
190613.3 C (55.9 F)
190714.4 C (57.9 F)
190813.9 C (57.0 F)
190911.1 C (52.0 F)
191012.2 C (54.0 F)
191113.9 C (57.0 F)
191213.9 C (57.0 F)
191313.9 C (57.0 F)
191414.4 C (57.9 F)
191512.8 C (55.0 F)
191613.3 C (55.9 F)
191712.2 C (54.0 F)
191813.3 C (55.9 F)
191912.8 C (55.0 F)
192015.0 C (59.0 F)
192114.4 C (57.9 F)
192213.9 C (57.0 F)
192312.8 C (55.0 F)
192411.7 C (53.1 F)
192513.9 C (57.0 F)
192613.9 C (57.0 F)
192713.9 C (57.0 F)
192814.4 C (57.9 F)
192915.0 C (59.0 F)
193013.9 C (57.0 F)
193116.1 C (61.0 F)
193210.0 C (50.0 F)
193313.3 C (55.9 F)
193414.4 C (57.9 F)
193512.8 C (55.0 F)
193613.3 C (55.9 F)
193713.3 C (55.9 F)
193810.6 C (51.1 F)
193915.6 C (60.1 F)
194011.7 C (53.1 F)
194114.4 C (57.9 F)
194214.4 C (57.9 F)
194315.6 C (60.1 F)
194415.0 C (59.0 F)
194516.1 C (61.0 F)
194616.1 C (61.0 F)
194714.4 C (57.9 F)
194815.0 C (59.0 F)
194914.4 C (57.9 F)
195015.6 C (60.1 F)
195113.9 C (57.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Haiku 490 by year The wettest day of the year at Haiku 490, 1905 to 1951. The record is 198.4 mm (7.8 in) in 1930, marked on the chart; the median year is 80.8 mm (3.2 in). 05010015020019101920193019401950Record: 198.4 mm (7.8 in) in 1930
The wettest day of the year at Haiku 490, 1905 to 1951. The record is 198.4 mm (7.8 in) in 1930, marked on the chart; the median year is 80.8 mm (3.2 in).
Wettest day (Rx1day) at Haiku 490 by year
YearWettest day (Rx1day)
190571.1 mm (2.8 in)
1906128.5 mm (5.1 in)
1907106.9 mm (4.2 in)
190845.0 mm (1.8 in)
1909108.5 mm (4.3 in)
1910140.7 mm (5.5 in)
191168.6 mm (2.7 in)
191249.0 mm (1.9 in)
191381.0 mm (3.2 in)
191496.0 mm (3.8 in)
191568.8 mm (2.7 in)
1916130.0 mm (5.1 in)
191754.1 mm (2.1 in)
1918147.6 mm (5.8 in)
191936.1 mm (1.4 in)
1920111.8 mm (4.4 in)
1921121.9 mm (4.8 in)
1922160.0 mm (6.3 in)
192363.8 mm (2.5 in)
1924102.9 mm (4.1 in)
1925102.1 mm (4.0 in)
192677.0 mm (3.0 in)
1927101.6 mm (4.0 in)
192852.1 mm (2.1 in)
192992.7 mm (3.6 in)
1930198.4 mm (7.8 in)
193158.9 mm (2.3 in)
1932148.6 mm (5.9 in)
193376.5 mm (3.0 in)
193443.7 mm (1.7 in)
1935124.5 mm (4.9 in)
193670.6 mm (2.8 in)
193746.7 mm (1.8 in)
193856.6 mm (2.2 in)
1939107.2 mm (4.2 in)
194080.3 mm (3.2 in)
1941112.0 mm (4.4 in)
194276.7 mm (3.0 in)
194364.8 mm (2.6 in)
194477.2 mm (3.0 in)
194533.8 mm (1.3 in)
194694.2 mm (3.7 in)
194776.7 mm (3.0 in)
194885.9 mm (3.4 in)
194977.7 mm (3.1 in)
195096.8 mm (3.8 in)
195180.8 mm (3.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Haiku 490 by year The wettest five days of the year at Haiku 490, 1905 to 1951. The record is 344.7 mm (13.6 in) in 1922, marked on the chart; the median year is 148.7 mm (5.9 in). 010020030040019101920193019401950Record: 344.7 mm (13.6 in) in 1922
The wettest five days of the year at Haiku 490, 1905 to 1951. The record is 344.7 mm (13.6 in) in 1922, marked on the chart; the median year is 148.7 mm (5.9 in).
Wettest five days (Rx5day) at Haiku 490 by year
YearWettest five days (Rx5day)
1905123.0 mm (4.8 in)
1906188.1 mm (7.4 in)
1907168.9 mm (6.6 in)
190885.7 mm (3.4 in)
1909197.9 mm (7.8 in)
1910175.2 mm (6.9 in)
1911170.3 mm (6.7 in)
191293.2 mm (3.7 in)
1913148.3 mm (5.8 in)
1914143.3 mm (5.6 in)
1915152.7 mm (6.0 in)
1916235.6 mm (9.3 in)
1917169.4 mm (6.7 in)
1918246.6 mm (9.7 in)
191971.2 mm (2.8 in)
1920179.2 mm (7.1 in)
1921250.8 mm (9.9 in)
1922344.7 mm (13.6 in)
1923186.9 mm (7.4 in)
1924186.2 mm (7.3 in)
1925124.5 mm (4.9 in)
1926133.7 mm (5.3 in)
1927215.7 mm (8.5 in)
1928103.9 mm (4.1 in)
1929233.1 mm (9.2 in)
1930307.6 mm (12.1 in)
193199.8 mm (3.9 in)
1932182.1 mm (7.2 in)
1933183.5 mm (7.2 in)
193493.1 mm (3.7 in)
1935134.7 mm (5.3 in)
1936129.8 mm (5.1 in)
1937130.0 mm (5.1 in)
1938148.7 mm (5.9 in)
1939116.8 mm (4.6 in)
194097.3 mm (3.8 in)
1941236.3 mm (9.3 in)
1942226.5 mm (8.9 in)
1943102.2 mm (4.0 in)
1944160.0 mm (6.3 in)
194573.9 mm (2.9 in)
1946165.9 mm (6.5 in)
1947128.3 mm (5.1 in)
1948107.7 mm (4.2 in)
1949108.9 mm (4.3 in)
1950137.7 mm (5.4 in)
1951131.1 mm (5.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Haiku 490 by year The longest dry spell of the year at Haiku 490, 1905 to 1951. The record is 47 days in 1920, marked on the chart; the median year is 12 days. 020406019101920193019401950Record: 47 days in 1920
The longest dry spell of the year at Haiku 490, 1905 to 1951. The record is 47 days in 1920, marked on the chart; the median year is 12 days.
Longest dry spell (CDD) at Haiku 490 by year
YearLongest dry spell (CDD)
190520 days
190610 days
190710 days
190810 days
190912 days
191020 days
19119 days
191214 days
191312 days
191419 days
19159 days
19167 days
191717 days
191812 days
191916 days
192047 days
192121 days
192212 days
19238 days
192421 days
192513 days
192617 days
192712 days
192812 days
192912 days
19309 days
193112 days
193212 days
193311 days
193410 days
193513 days
193615 days
19378 days
19389 days
193910 days
194011 days
194119 days
194211 days
194315 days
194413 days
194529 days
194615 days
194717 days
194812 days
194911 days
19506 days
195113 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

37 years, 1905 to 1946

A day with at least 87.4 mm (3.4 in) of rain is expected about once in 2 years. A day with at least 207.4 mm (8.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Haiku 490: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years87.4 mm (3.4 in)
5 years122.0 mm (4.8 in)
10 years143.9 mm (5.7 in)
25 years170.4 mm (6.7 in)
50 years189.3 mm (7.5 in)Longer than the 37 years of record
100 years207.4 mm (8.2 in)Longer than the 37 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, 37 years of values from 1905 to 1946.

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: 198.4 mm (7.8 in) in 1930; 160.0 mm (6.3 in) in 1922; 148.6 mm (5.9 in) in 1932.

Download the Data

  • Data for Haiku 490 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Haiku 490 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 . Last revised (2025-12-31).