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Hilo Intl AP 87 Weather Records (USW00021504)

Record envelope, standing records and threshold days for Hilo Intl AP 87 (USW00021504), Hawaii, United States, with 78 years of record.

Key Facts for Hilo Intl AP 87

  • Hilo Intl AP 87 (USW00021504) is a weather station in Hawaii, United States at 19.72 latitude and -155.05 longitude, 9 m (29 ft) above sea level.
  • The station reports from 1949 to 2026, 78 years of record.
  • 1,464 records set at Hilo Intl AP 87 still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Hilo Intl AP 87 set a daily record high minimum temperature of 23.3 C (73.9 F) on 9 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Hawaii, United States, 19.72 latitude, -155.05 longitude.
  • Elevation: 9 m (29 ft).
  • Period of record: 1949 to 2026, 78 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

4 days at or beyond a record
Daily record high and record low at Hilo Intl AP 87, with 2026 drawn through them The band shows the record high and record low for each calendar day at Hilo Intl AP 87. The lines show the 2026 daily maximum and minimum. 4 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 Hilo Intl AP 87. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Hilo Intl AP 87, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan33.3 C (91.9 F)12.2 C (54.0 F)30.0 C (86.0 F)15.6 C (60.1 F)
Feb33.3 C (91.9 F)11.7 C (53.1 F)30.0 C (86.0 F)14.4 C (57.9 F)
Mar33.9 C (93.0 F)12.2 C (54.0 F)31.7 C (89.1 F)16.1 C (61.0 F)
Apr31.7 C (89.1 F)14.4 C (57.9 F)29.4 C (84.9 F)16.1 C (61.0 F)
May34.4 C (93.9 F)14.4 C (57.9 F)28.9 C (84.0 F)18.3 C (64.9 F)
Jun32.2 C (90.0 F)16.1 C (61.0 F)30.0 C (86.0 F)18.9 C (66.0 F)
Jul33.9 C (93.0 F)16.7 C (62.1 F)30.6 C (87.1 F)20.0 C (68.0 F)
Aug33.9 C (93.0 F)17.2 C (63.0 F)30.6 C (87.1 F)21.1 C (70.0 F)
Sep33.9 C (93.0 F)16.1 C (61.0 F)31.7 C (89.1 F)19.4 C (66.9 F)
Oct32.8 C (91.0 F)16.7 C (62.1 F)31.1 C (88.0 F)20.0 C (68.0 F)
Nov34.4 C (93.9 F)14.4 C (57.9 F)n/an/a
Dec33.9 C (93.0 F)12.8 C (55.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Hilo Intl AP 87 by the year they were set 1,464 records at Hilo Intl AP 87 still stand. 1955 holds the most, with 70. 0204060801949: 201950: 331951: 241952: 401953: 181954: 271955: 701956: 271957: 231958: 261959: 141960: 151961: 101962: 261963: 161964: 231965: 241966: 241967: 381968: 361969: 231970: 221971: 281972: 281973: 101974: 121975: 81976: 151977: 251978: 181979: 251980: 461981: 141982: 221983: 81984: 11985: 251986: 261987: 111988: 101989: 111990: 171991: 81992: 231993: 81994: 261995: 251996: 161997: 71998: 111999: 182000: 82001: 52002: 52003: 132004: 202005: 52006: 82007: 122008: 82009: 142010: 52011: 52012: 42013: 132014: 152015: 472016: 152017: 72018: 402019: 552020: 412021: 152022: 22023: 52024: 42025: 32026: 91949195719651973198119891997200520132021
1,464 records at Hilo Intl AP 87 still stand. 1955 holds the most, with 70.
Standing records at Hilo Intl AP 87 by the year they were set
Year setStanding records
194920
195033
195124
195240
195318
195427
195570
195627
195723
195826
195914
196015
196110
196226
196316
196423
196524
196624
196738
196836
196923
197022
197128
197228
197310
197412
19758
197615
197725
197818
197925
198046
198114
198222
19838
19841
198525
198626
198711
198810
198911
199017
19918
199223
19938
199426
199525
199616
19977
199811
199918
20008
20015
20025
200313
200420
20055
20068
200712
20088
200914
20105
20115
20124
201313
201415
201547
201615
20177
201840
201955
202041
202115
20222
20235
20244
20253
20269

All-Time Record Progression

2 new records
When Hilo Intl AP 87 set new all-time records 2 all-time records were set at Hilo Intl AP 87 between 10 September 1992 and 22 August 2015. Each dot is a new record. Record high minimum temperature10 September 1992: Record high minimum temperature 24.4 C (75.9 F)22 August 2015: Record high minimum temperature 25.0 C (77.0 F)19952000200520102015
2 all-time records were set at Hilo Intl AP 87 between 10 September 1992 and 22 August 2015. Each dot is a new record.
When Hilo Intl AP 87 set new all-time records
DateKindDetail
1992-09-10Record high minimum temperatureRecord high minimum temperature 24.4 C (75.9 F)
2015-08-22Record high minimum temperatureRecord high minimum temperature 25.0 C (77.0 F)

Wettest Day of Each Month

Feb: 428.5 mm (16.9 in)
Record daily precipitation for each month at Hilo Intl AP 87 The wettest day on record for each calendar month at Hilo Intl AP 87. The most was 428.5 mm (16.9 in) on 20 February 1979. 0200400600 Jan: 309.9 mm (12.2 in), 29 January 2002 Jan Feb: 428.5 mm (16.9 in), 20 February 1979 Feb Mar: 397.8 mm (15.7 in), 17 March 1980 Mar Apr: 245.4 mm (9.7 in), 23 April 1971 Apr May: 200.4 mm (7.9 in), 15 May 1989 May Jun: 86.1 mm (3.4 in), 26 June 1997 Jun Jul: 150.1 mm (5.9 in), 21 July 1987 Jul Aug: 381.0 mm (15.0 in), 24 August 2018 Aug Sep: 220.2 mm (8.7 in), 19 September 1994 Sep Oct: 219.2 mm (8.6 in), 28 October 1961 Oct Nov: 410.7 mm (16.2 in), 2 November 2000 Nov Dec: 257.0 mm (10.1 in), 26 December 2008 Dec
The wettest day on record for each calendar month at Hilo Intl AP 87. The most was 428.5 mm (16.9 in) on 20 February 1979.
Record daily precipitation for each month at Hilo Intl AP 87
MonthRecord daily precipitation (mm)Date
Jan309.9 mm (12.2 in)29 January 2002
Feb428.5 mm (16.9 in)20 February 1979
Mar397.8 mm (15.7 in)17 March 1980
Apr245.4 mm (9.7 in)23 April 1971
May200.4 mm (7.9 in)15 May 1989
Jun86.1 mm (3.4 in)26 June 1997
Jul150.1 mm (5.9 in)21 July 1987
Aug381.0 mm (15.0 in)24 August 2018
Sep220.2 mm (8.7 in)19 September 1994
Oct219.2 mm (8.6 in)28 October 1961
Nov410.7 mm (16.2 in)2 November 2000
Dec257.0 mm (10.1 in)26 December 2008

Period of Record Coverage

1949 to 2026
Days with data per year at Hilo Intl AP 87 78 years of record at Hilo Intl AP 87, 1949 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1949, 2026. 1949: 92 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 361 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 335 of 366 days2025: 358 of 365 days2026: 286 of 365 days19501960197019801990200020102020
78 years of record at Hilo Intl AP 87, 1949 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1949, 2026.
Days with data per year at Hilo Intl AP 87
YearDays with dataShare of yearComplete
19499225%No
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
202136199%Yes
2022365100%Yes
2023365100%Yes
202433592%Yes
202535898%Yes
202628678%No

Latest Records

20
Latest records at Hilo Intl AP 87
DateStationRecordValueBeat old record byOld record stoodSignificance
9 October 2026Hilo Intl AP 87, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)12 years13 of 100 (Routine)
30 September 2026Hilo Intl AP 87, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)72 years31 of 100 (Routine)
25 September 2026Hilo Intl AP 87, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)12 years13 of 100 (Routine)
17 September 2026Hilo Intl AP 87, USall-time high min (Tie, Provisional)25.0 C (77.0 F)tie11 years7 of 100 (Routine)
10 September 2026Hilo Intl AP 87, USdaily rain (Provisional)45.5 mm (1.8 in)12.5 mm (0.5 in)39 years26 of 100 (Routine)
7 September 2026Hilo Intl AP 87, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie8 years2 of 100 (Routine)
2 September 2026Hilo Intl AP 87, USdaily high min (Tie, Provisional)23.9 C (75.0 F)tie32 years4 of 100 (Routine)
25 August 2026Hilo Intl AP 87, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie52 years5 of 100 (Routine)
24 August 2026Hilo Intl AP 87, USdaily high min (Tie, Provisional)23.3 C (73.9 F)tie11 years2 of 100 (Routine)
16 August 2026Hilo Intl AP 87, USdaily rain148.1 mm (5.8 in)102.1 mm (4.0 in)69 years67 of 100 (Major)
16 August 2026Hilo Intl AP 87, USdaily high min24.4 C (75.9 F)0.5 C (0.9 F)32 years20 of 100 (Routine)
15 August 2026Hilo Intl AP 87, USdaily rain173.2 mm (6.8 in)43.7 mm (1.7 in)56 years44 of 100 (Notable)
13 August 2026Hilo Intl AP 87, USdaily high min (Tie)23.3 C (73.9 F)tie48 years5 of 100 (Routine)
10 August 2026Hilo Intl AP 87, USdaily high min (Tie)23.9 C (75.0 F)tie8 years2 of 100 (Routine)
9 August 2026Hilo Intl AP 87, USdaily high min (Tie)23.3 C (73.9 F)tie9 years2 of 100 (Routine)
4 August 2026Hilo Intl AP 87, USdaily high min (Tie)23.3 C (73.9 F)tie12 years2 of 100 (Routine)
28 July 2026Hilo Intl AP 87, USdaily high min23.9 C (75.0 F)0.6 C (1.1 F)21 years17 of 100 (Routine)
11 July 2026Hilo Intl AP 87, USdaily high min (Tie)22.8 C (73.0 F)tie55 years5 of 100 (Routine)
21 June 2026Hilo Intl AP 87, USdaily high min (Tie)21.7 C (71.1 F)tie59 years6 of 100 (Routine)
20 June 2026Hilo Intl AP 87, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)45 years24 of 100 (Routine)

Climate Trend

75 complete years, 1950 to 2025
Annual mean temperature at Hilo Intl AP 87 as warming stripes, 1950 to 2025 One stripe for each of 75 complete years at Hilo Intl AP 87, 1950 to 2025. Blue stripes are years cooler than the station's own mean of 23.4 C (74.0 F); red stripes are warmer. The coolest year was 1955, at 21.9 C (71.4 F), and the warmest was 2020, at 24.9 C (76.8 F). The strongest colour marks a difference of 1.6 C (2.9 F). 1950: 22.8 C, -0.6 C from the station mean1951: 22.8 C, -0.5 C from the station mean1952: 22.3 C, -1.1 C from the station mean1953: 22.5 C, -0.9 C from the station mean1954: 22.8 C, -0.6 C from the station mean1955: 21.9 C, -1.5 C from the station mean1956: 22.6 C, -0.8 C from the station mean1957: 22.8 C, -0.6 C from the station mean1958: 22.8 C, -0.6 C from the station mean1959: 23.0 C, -0.3 C from the station mean1960: 22.8 C, -0.6 C from the station mean1961: 23.1 C, -0.3 C from the station mean1962: 22.8 C, -0.6 C from the station mean1963: 23.3 C, -0.1 C from the station mean1964: 22.8 C, -0.5 C from the station mean1965: 22.8 C, -0.5 C from the station mean1966: 23.5 C, +0.1 C from the station mean1967: 24.2 C, +0.8 C from the station mean1968: 24.1 C, +0.8 C from the station mean1969: 23.2 C, -0.1 C from the station mean1970: 22.9 C, -0.4 C from the station mean1971: 23.0 C, -0.4 C from the station mean1972: 23.2 C, -0.2 C from the station mean1973: 23.4 C, 0.0 C from the station mean1974: 23.7 C, +0.3 C from the station mean1975: 23.0 C, -0.4 C from the station mean1976: 23.2 C, -0.2 C from the station mean1977: 24.1 C, +0.7 C from the station mean1978: 23.6 C, +0.3 C from the station mean1979: 23.0 C, -0.3 C from the station mean1980: 23.8 C, +0.4 C from the station mean1981: 23.4 C, 0.0 C from the station mean1982: 23.2 C, -0.2 C from the station mean1983: 23.0 C, -0.4 C from the station mean1984: 23.2 C, -0.1 C from the station mean1985: 22.5 C, -0.8 C from the station mean1986: 24.0 C, +0.7 C from the station mean1987: 23.5 C, +0.1 C from the station mean1988: 23.7 C, +0.3 C from the station mean1989: 22.9 C, -0.4 C from the station mean1990: 23.4 C, +0.1 C from the station mean1991: 23.5 C, +0.1 C from the station mean1992: 23.7 C, +0.3 C from the station mean1993: 23.2 C, -0.1 C from the station mean1994: 23.8 C, +0.4 C from the station mean1995: 24.2 C, +0.8 C from the station mean1996: 24.0 C, +0.6 C from the station mean1997: 23.9 C, +0.6 C from the station mean1998: 22.8 C, -0.6 C from the station mean1999: 22.3 C, -1.0 C from the station mean2000: 22.9 C, -0.4 C from the station mean2001: 23.0 C, -0.4 C from the station mean2002: 23.4 C, 0.0 C from the station mean2003: 23.8 C, +0.4 C from the station mean2004: 24.0 C, +0.7 C from the station mean2005: 23.7 C, +0.4 C from the station mean2006: 23.3 C, -0.1 C from the station mean2007: 23.4 C, +0.1 C from the station mean2008: 23.1 C, -0.2 C from the station mean2009: 22.8 C, -0.6 C from the station mean2010: 23.2 C, -0.2 C from the station mean2011: 23.2 C, -0.2 C from the station mean2012: 23.0 C, -0.4 C from the station mean2013: 23.6 C, +0.3 C from the station mean2014: 23.8 C, +0.4 C from the station mean2015: 24.5 C, +1.2 C from the station mean2016: 24.2 C, +0.9 C from the station mean2017: 23.7 C, +0.3 C from the station mean2018: 24.3 C, +0.9 C from the station mean2019: 24.4 C, +1.1 C from the station mean2020: 24.9 C, +1.5 C from the station mean2021: 24.0 C, +0.6 C from the station mean2022: 23.9 C, +0.6 C from the station mean2023: 23.9 C, +0.5 C from the station mean2025: 24.0 C, +0.7 C from the station mean19501960197019801990200020102020
One stripe for each of 75 complete years at Hilo Intl AP 87, 1950 to 2025. Blue stripes are years cooler than the station's own mean of 23.4 C (74.0 F); red stripes are warmer. The coolest year was 1955, at 21.9 C (71.4 F), and the warmest was 2020, at 24.9 C (76.8 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Hilo Intl AP 87 as warming stripes, 1950 to 2025
YearAnnual mean temperatureDifference from the station mean
195022.8 C-0.57 C
195122.8 C-0.52 C
195222.3 C-1.09 C
195322.5 C-0.89 C
195422.8 C-0.59 C
195521.9 C-1.49 C
195622.6 C-0.76 C
195722.8 C-0.56 C
195822.8 C-0.60 C
195923.0 C-0.35 C
196022.8 C-0.57 C
196123.1 C-0.28 C
196222.8 C-0.57 C
196323.3 C-0.11 C
196422.8 C-0.55 C
196522.8 C-0.53 C
196623.5 C+0.10 C
196724.2 C+0.81 C
196824.1 C+0.77 C
196923.2 C-0.14 C
197022.9 C-0.42 C
197123.0 C-0.38 C
197223.2 C-0.20 C
197323.4 C+0.00 C
197423.7 C+0.32 C
197523.0 C-0.39 C
197623.2 C-0.21 C
197724.1 C+0.73 C
197823.6 C+0.28 C
197923.0 C-0.32 C
198023.8 C+0.39 C
198123.4 C+0.04 C
198223.2 C-0.16 C
198323.0 C-0.40 C
198423.2 C-0.12 C
198522.5 C-0.82 C
198624.0 C+0.67 C
198723.5 C+0.10 C
198823.7 C+0.31 C
198922.9 C-0.42 C
199023.4 C+0.08 C
199123.5 C+0.14 C
199223.7 C+0.34 C
199323.2 C-0.12 C
199423.8 C+0.39 C
199524.2 C+0.84 C
199624.0 C+0.61 C
199723.9 C+0.58 C
199822.8 C-0.60 C
199922.3 C-1.03 C
200022.9 C-0.42 C
200123.0 C-0.37 C
200223.4 C+0.04 C
200323.8 C+0.39 C
200424.0 C+0.67 C
200523.7 C+0.38 C
200623.3 C-0.09 C
200723.4 C+0.08 C
200823.1 C-0.23 C
200922.8 C-0.58 C
201023.2 C-0.17 C
201123.2 C-0.16 C
201223.0 C-0.36 C
201323.6 C+0.25 C
201423.8 C+0.39 C
201524.5 C+1.18 C
201624.2 C+0.88 C
201723.7 C+0.30 C
201824.3 C+0.94 C
201924.4 C+1.06 C
202024.9 C+1.52 C
202124.0 C+0.61 C
202223.9 C+0.58 C
202323.9 C+0.51 C
202524.0 C+0.66 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1950 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 75 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Hilo Intl AP 87
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1950 to 202575Rise
Mean daily maximum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.4) per decade1950 to 202575Rise
Mean daily minimum0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.4) per decade1950 to 202575Rise

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

1949 to 2026
Yearly extremes at Hilo Intl AP 87: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)34.4 C (93.9 F)196631.7 C (89.1 F)78
Coldest night (TNn)11.7 C (53.1 F)196214.4 C (57.9 F)78
Wettest day (Rx1day)428.5 mm (16.9 in)1979167.5 mm (6.6 in)78
Wettest five days (Rx5day)953.5 mm (37.5 in)2018333.9 mm (13.1 in)78
Longest dry spell (CDD)28 days199812 days78

Hottest day (TXx)

Hottest day (TXx) at Hilo Intl AP 87 by year The hottest day of the year at Hilo Intl AP 87, 1949 to 2026. The record is 34.4 C (93.9 F) in 1966, marked on the chart; the median year is 31.7 C (89.1 F). 303234361960198020002020Record: 34.4 C (93.9 F) in 1966
The hottest day of the year at Hilo Intl AP 87, 1949 to 2026. The record is 34.4 C (93.9 F) in 1966, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Hilo Intl AP 87 by year
YearHottest day (TXx)
194930.0 C (86.0 F)
195033.9 C (93.0 F)
195133.3 C (91.9 F)
195231.1 C (88.0 F)
195330.0 C (86.0 F)
195430.6 C (87.1 F)
195530.0 C (86.0 F)
195631.1 C (88.0 F)
195731.1 C (88.0 F)
195831.7 C (89.1 F)
195931.7 C (89.1 F)
196032.2 C (90.0 F)
196132.8 C (91.0 F)
196232.2 C (90.0 F)
196331.7 C (89.1 F)
196432.2 C (90.0 F)
196532.8 C (91.0 F)
196634.4 C (93.9 F)
196732.8 C (91.0 F)
196833.3 C (91.9 F)
196932.2 C (90.0 F)
197031.7 C (89.1 F)
197132.8 C (91.0 F)
197233.9 C (93.0 F)
197331.7 C (89.1 F)
197432.2 C (90.0 F)
197531.1 C (88.0 F)
197632.8 C (91.0 F)
197732.8 C (91.0 F)
197831.7 C (89.1 F)
197932.8 C (91.0 F)
198033.9 C (93.0 F)
198132.2 C (90.0 F)
198230.6 C (87.1 F)
198330.6 C (87.1 F)
198430.6 C (87.1 F)
198532.2 C (90.0 F)
198632.2 C (90.0 F)
198732.2 C (90.0 F)
198832.2 C (90.0 F)
198930.6 C (87.1 F)
199031.1 C (88.0 F)
199132.8 C (91.0 F)
199232.8 C (91.0 F)
199331.1 C (88.0 F)
199431.7 C (89.1 F)
199531.7 C (89.1 F)
199633.3 C (91.9 F)
199733.3 C (91.9 F)
199830.6 C (87.1 F)
199931.7 C (89.1 F)
200030.0 C (86.0 F)
200130.6 C (87.1 F)
200230.6 C (87.1 F)
200332.8 C (91.0 F)
200432.8 C (91.0 F)
200531.7 C (89.1 F)
200631.7 C (89.1 F)
200731.7 C (89.1 F)
200831.7 C (89.1 F)
200931.7 C (89.1 F)
201030.6 C (87.1 F)
201130.0 C (86.0 F)
201230.0 C (86.0 F)
201334.4 C (93.9 F)
201433.9 C (93.0 F)
201533.9 C (93.0 F)
201632.2 C (90.0 F)
201731.7 C (89.1 F)
201832.8 C (91.0 F)
201933.3 C (91.9 F)
202033.9 C (93.0 F)
202130.6 C (87.1 F)
202231.7 C (89.1 F)
202331.1 C (88.0 F)
202431.1 C (88.0 F)
202531.7 C (89.1 F)
202631.7 C (89.1 F)

Coldest night (TNn)

Coldest night (TNn) at Hilo Intl AP 87 by year The coldest night of the year at Hilo Intl AP 87, 1949 to 2026. The record is 11.7 C (53.1 F) in 1962, marked on the chart; the median year is 14.4 C (57.9 F). 1112131415161960198020002020Record: 11.7 C (53.1 F) in 1962
The coldest night of the year at Hilo Intl AP 87, 1949 to 2026. The record is 11.7 C (53.1 F) in 1962, marked on the chart; the median year is 14.4 C (57.9 F).
Coldest night (TNn) at Hilo Intl AP 87 by year
YearColdest night (TNn)
194913.3 C (55.9 F)
195015.6 C (60.1 F)
195113.3 C (55.9 F)
195215.0 C (59.0 F)
195313.9 C (57.0 F)
195413.3 C (55.9 F)
195513.3 C (55.9 F)
195613.9 C (57.0 F)
195713.9 C (57.0 F)
195813.3 C (55.9 F)
195915.0 C (59.0 F)
196012.8 C (55.0 F)
196112.8 C (55.0 F)
196211.7 C (53.1 F)
196313.9 C (57.0 F)
196415.6 C (60.1 F)
196512.8 C (55.0 F)
196615.0 C (59.0 F)
196712.8 C (55.0 F)
196815.6 C (60.1 F)
196912.2 C (54.0 F)
197014.4 C (57.9 F)
197112.2 C (54.0 F)
197213.9 C (57.0 F)
197314.4 C (57.9 F)
197415.0 C (59.0 F)
197513.9 C (57.0 F)
197615.0 C (59.0 F)
197712.8 C (55.0 F)
197813.3 C (55.9 F)
197913.9 C (57.0 F)
198012.2 C (54.0 F)
198113.9 C (57.0 F)
198214.4 C (57.9 F)
198312.2 C (54.0 F)
198415.6 C (60.1 F)
198513.9 C (57.0 F)
198615.0 C (59.0 F)
198713.3 C (55.9 F)
198815.6 C (60.1 F)
198914.4 C (57.9 F)
199013.9 C (57.0 F)
199114.4 C (57.9 F)
199214.4 C (57.9 F)
199313.9 C (57.0 F)
199413.9 C (57.0 F)
199512.2 C (54.0 F)
199615.6 C (60.1 F)
199715.0 C (59.0 F)
199814.4 C (57.9 F)
199915.0 C (59.0 F)
200014.4 C (57.9 F)
200113.9 C (57.0 F)
200215.6 C (60.1 F)
200315.6 C (60.1 F)
200415.0 C (59.0 F)
200515.0 C (59.0 F)
200615.0 C (59.0 F)
200713.9 C (57.0 F)
200814.4 C (57.9 F)
200913.3 C (55.9 F)
201014.4 C (57.9 F)
201115.0 C (59.0 F)
201215.6 C (60.1 F)
201314.4 C (57.9 F)
201414.4 C (57.9 F)
201515.0 C (59.0 F)
201615.0 C (59.0 F)
201713.9 C (57.0 F)
201814.4 C (57.9 F)
201913.9 C (57.0 F)
202015.0 C (59.0 F)
202115.6 C (60.1 F)
202215.6 C (60.1 F)
202315.0 C (59.0 F)
202414.4 C (57.9 F)
202515.6 C (60.1 F)
202614.4 C (57.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Hilo Intl AP 87 by year The wettest day of the year at Hilo Intl AP 87, 1949 to 2026. The record is 428.5 mm (16.9 in) in 1979, marked on the chart; the median year is 167.5 mm (6.6 in). 01002003004005001960198020002020Record: 428.5 mm (16.9 in) in 1979
The wettest day of the year at Hilo Intl AP 87, 1949 to 2026. The record is 428.5 mm (16.9 in) in 1979, marked on the chart; the median year is 167.5 mm (6.6 in).
Wettest day (Rx1day) at Hilo Intl AP 87 by year
YearWettest day (Rx1day)
194983.1 mm (3.3 in)
1950213.9 mm (8.4 in)
1951219.2 mm (8.6 in)
1952133.6 mm (5.3 in)
1953127.0 mm (5.0 in)
1954219.7 mm (8.6 in)
195587.9 mm (3.5 in)
1956203.2 mm (8.0 in)
1957234.7 mm (9.2 in)
1958135.1 mm (5.3 in)
1959323.1 mm (12.7 in)
1960180.1 mm (7.1 in)
1961219.2 mm (8.6 in)
196287.1 mm (3.4 in)
1963192.0 mm (7.6 in)
1964149.9 mm (5.9 in)
1965151.4 mm (6.0 in)
1966155.7 mm (6.1 in)
1967226.8 mm (8.9 in)
1968227.6 mm (9.0 in)
1969269.2 mm (10.6 in)
1970237.0 mm (9.3 in)
1971245.4 mm (9.7 in)
1972109.0 mm (4.3 in)
1973157.7 mm (6.2 in)
1974113.3 mm (4.5 in)
1975171.2 mm (6.7 in)
1976144.0 mm (5.7 in)
197797.5 mm (3.8 in)
197881.0 mm (3.2 in)
1979428.5 mm (16.9 in)
1980397.8 mm (15.7 in)
1981203.2 mm (8.0 in)
1982233.7 mm (9.2 in)
198364.0 mm (2.5 in)
198486.6 mm (3.4 in)
1985122.7 mm (4.8 in)
1986163.8 mm (6.4 in)
1987193.5 mm (7.6 in)
1988132.8 mm (5.2 in)
1989200.4 mm (7.9 in)
1990391.4 mm (15.4 in)
1991244.9 mm (9.6 in)
1992280.9 mm (11.1 in)
1993130.3 mm (5.1 in)
1994220.2 mm (8.7 in)
199564.8 mm (2.6 in)
1996144.0 mm (5.7 in)
1997126.2 mm (5.0 in)
199885.9 mm (3.4 in)
1999124.0 mm (4.9 in)
2000410.7 mm (16.2 in)
2001172.7 mm (6.8 in)
2002309.9 mm (12.2 in)
200380.3 mm (3.2 in)
2004227.1 mm (8.9 in)
2005150.6 mm (5.9 in)
2006118.9 mm (4.7 in)
200790.2 mm (3.6 in)
2008274.8 mm (10.8 in)
2009259.1 mm (10.2 in)
201064.0 mm (2.5 in)
201173.4 mm (2.9 in)
2012123.4 mm (4.9 in)
2013190.8 mm (7.5 in)
2014131.3 mm (5.2 in)
2015175.5 mm (6.9 in)
2016181.6 mm (7.1 in)
2017233.4 mm (9.2 in)
2018381.0 mm (15.0 in)
2019156.0 mm (6.1 in)
2020232.7 mm (9.2 in)
2021135.4 mm (5.3 in)
2022122.9 mm (4.8 in)
2023282.7 mm (11.1 in)
2024119.9 mm (4.7 in)
202548.8 mm (1.9 in)
2026173.2 mm (6.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Hilo Intl AP 87 by year The wettest five days of the year at Hilo Intl AP 87, 1949 to 2026. The record is 953.5 mm (37.5 in) in 2018, marked on the chart; the median year is 333.9 mm (13.1 in). 02505007501,0001960198020002020Record: 953.5 mm (37.5 in) in 2018
The wettest five days of the year at Hilo Intl AP 87, 1949 to 2026. The record is 953.5 mm (37.5 in) in 2018, marked on the chart; the median year is 333.9 mm (13.1 in).
Wettest five days (Rx5day) at Hilo Intl AP 87 by year
YearWettest five days (Rx5day)
1949194.4 mm (7.7 in)
1950391.0 mm (15.4 in)
1951483.9 mm (19.1 in)
1952406.9 mm (16.0 in)
1953367.3 mm (14.5 in)
1954644.0 mm (25.4 in)
1955173.4 mm (6.8 in)
1956459.5 mm (18.1 in)
1957278.1 mm (10.9 in)
1958234.4 mm (9.2 in)
1959616.2 mm (24.3 in)
1960461.1 mm (18.2 in)
1961342.0 mm (13.5 in)
1962135.7 mm (5.3 in)
1963580.6 mm (22.9 in)
1964386.7 mm (15.2 in)
1965405.0 mm (15.9 in)
1966273.9 mm (10.8 in)
1967309.7 mm (12.2 in)
1968360.5 mm (14.2 in)
1969827.9 mm (32.6 in)
1970361.9 mm (14.2 in)
1971417.5 mm (16.4 in)
1972169.7 mm (6.7 in)
1973262.9 mm (10.4 in)
1974288.1 mm (11.3 in)
1975336.0 mm (13.2 in)
1976216.1 mm (8.5 in)
1977242.9 mm (9.6 in)
1978198.4 mm (7.8 in)
1979801.4 mm (31.6 in)
1980742.1 mm (29.2 in)
1981315.0 mm (12.4 in)
1982387.4 mm (15.3 in)
1983106.9 mm (4.2 in)
1984132.3 mm (5.2 in)
1985296.2 mm (11.7 in)
1986552.9 mm (21.8 in)
1987388.3 mm (15.3 in)
1988240.9 mm (9.5 in)
1989331.8 mm (13.1 in)
1990591.1 mm (23.3 in)
1991523.0 mm (20.6 in)
1992344.1 mm (13.5 in)
1993259.0 mm (10.2 in)
1994359.1 mm (14.1 in)
1995160.0 mm (6.3 in)
1996246.6 mm (9.7 in)
1997255.5 mm (10.1 in)
1998210.5 mm (8.3 in)
1999301.8 mm (11.9 in)
2000781.3 mm (30.8 in)
2001283.2 mm (11.1 in)
2002401.1 mm (15.8 in)
2003233.4 mm (9.2 in)
2004406.7 mm (16.0 in)
2005312.2 mm (12.3 in)
2006374.9 mm (14.8 in)
2007197.9 mm (7.8 in)
2008785.3 mm (30.9 in)
2009527.1 mm (20.8 in)
2010136.7 mm (5.4 in)
2011176.0 mm (6.9 in)
2012204.2 mm (8.0 in)
2013393.0 mm (15.5 in)
2014340.7 mm (13.4 in)
2015316.3 mm (12.5 in)
2016338.8 mm (13.3 in)
2017279.3 mm (11.0 in)
2018953.5 mm (37.5 in)
2019237.3 mm (9.3 in)
2020359.7 mm (14.2 in)
2021313.2 mm (12.3 in)
2022275.3 mm (10.8 in)
2023468.1 mm (18.4 in)
2024248.5 mm (9.8 in)
2025122.7 mm (4.8 in)
2026382.3 mm (15.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Hilo Intl AP 87 by year The longest dry spell of the year at Hilo Intl AP 87, 1949 to 2026. The record is 28 days in 1998, marked on the chart; the median year is 12 days. 01020301960198020002020Record: 28 days in 1998
The longest dry spell of the year at Hilo Intl AP 87, 1949 to 2026. The record is 28 days in 1998, marked on the chart; the median year is 12 days.
Longest dry spell (CDD) at Hilo Intl AP 87 by year
YearLongest dry spell (CDD)
19495 days
195010 days
195112 days
19526 days
195316 days
195414 days
19558 days
19567 days
195710 days
195817 days
19598 days
196023 days
196111 days
196212 days
19639 days
196411 days
196513 days
19669 days
196710 days
196810 days
196917 days
197017 days
197113 days
197223 days
197313 days
197412 days
19758 days
197610 days
197719 days
197813 days
19799 days
198018 days
198112 days
19827 days
198316 days
19848 days
198514 days
198620 days
198715 days
19889 days
198917 days
199011 days
199115 days
199215 days
199313 days
199411 days
199517 days
199614 days
199710 days
199828 days
199913 days
200015 days
200112 days
200212 days
200314 days
200410 days
200519 days
20068 days
200712 days
200821 days
200911 days
201011 days
20119 days
201211 days
20138 days
201414 days
201524 days
20168 days
201714 days
20187 days
201916 days
20206 days
20219 days
202212 days
202317 days
202420 days
202514 days
202616 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

76 years, 1950 to 2025

A day with at least 168.0 mm (6.6 in) of rain is expected about once in 2 years. A day with at least 462.9 mm (18.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Hilo Intl AP 87: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years168.0 mm (6.6 in)
5 years245.9 mm (9.7 in)
10 years297.9 mm (11.7 in)
25 years364.0 mm (14.3 in)
50 years413.5 mm (16.3 in)
100 years462.9 mm (18.2 in)Longer than the 76 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, 76 years of values from 1950 to 2025.

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: 428.5 mm (16.9 in) in 1979; 410.7 mm (16.2 in) in 2000; 397.8 mm (15.7 in) in 1980.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Hilo Intl AP 87 had a mean temperature of 23.9 C (75.0 F) and 2,783.1 mm (109.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Putla de Guerrero (Cfe) (Mexico, 6,012 km away), La Catarata (Cfe) (Mexico, 6,714 km away) and San Juan del Rio (Mexico, 6,217 km away).

Climate twins of Hilo Intl AP 87: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Putla de Guerrero (Cfe)Mexico6,012 km (3,736 mi)24.2 C (75.5 F)2,461.8 mm (96.9 in)1.69
La Catarata (Cfe)Mexico6,714 km (4,172 mi)25.0 C (77.0 F)2,973.8 mm (117.1 in)1.75
San Juan del RioMexico6,217 km (3,863 mi)24.4 C (75.9 F)2,779.4 mm (109.4 in)1.84

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Hilo Intl AP 87 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Hilo Intl AP 87 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-16).