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Irozaki Weather Records (JA000047666)

Record envelope, standing records and threshold days for Irozaki (JA000047666), Japan, with 76 years of record.

Key Facts for Irozaki

  • Irozaki (JA000047666) is a weather station in Japan at 34.60 latitude and 138.85 longitude, 56 m (184 ft) above sea level.
  • The station reports from 1951 to 2026, 76 years of record.
  • 1,464 records set at Irozaki still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Irozaki set a monthly record daily precipitation of 275.5 mm (10.8 in) on 4 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Japan, 34.60 latitude, 138.85 longitude.
  • Elevation: 56 m (184 ft).
  • Period of record: 1951 to 2026, 76 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

9 days at or beyond a record
Daily record high and record low at Irozaki, with 2026 drawn through them The band shows the record high and record low for each calendar day at Irozaki. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Irozaki. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Irozaki, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.2 C (66.6 F)-2.1 C (28.2 F)16.5 C (61.7 F)2.2 C (36.0 F)
Feb20.2 C (68.4 F)-2.7 C (27.1 F)18.6 C (65.5 F)-0.6 C (30.9 F)
Mar21.5 C (70.7 F)0.6 C (33.1 F)17.2 C (63.0 F)6.0 C (42.8 F)
Apr24.2 C (75.6 F)3.3 C (37.9 F)22.2 C (72.0 F)9.4 C (48.9 F)
May26.4 C (79.5 F)8.4 C (47.1 F)26.2 C (79.2 F)14.2 C (57.6 F)
Jun30.8 C (87.4 F)13.2 C (55.8 F)26.6 C (79.9 F)16.6 C (61.9 F)
Jul33.9 C (93.0 F)14.8 C (58.6 F)32.9 C (91.2 F)19.4 C (66.9 F)
Aug33.8 C (92.8 F)17.4 C (63.3 F)31.1 C (88.0 F)22.8 C (73.0 F)
Sep31.7 C (89.1 F)13.2 C (55.8 F)30.2 C (86.4 F)17.9 C (64.2 F)
Oct29.0 C (84.2 F)9.3 C (48.7 F)26.8 C (80.2 F)19.9 C (67.8 F)
Nov25.9 C (78.6 F)3.8 C (38.8 F)n/an/a
Dec22.2 C (72.0 F)0.7 C (33.3 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Irozaki by the year they were set 1,464 records at Irozaki still stand. 2025 holds the most, with 94. 02550751001951: 121952: 101953: 201954: 371955: 101956: 261957: 161958: 251959: 221960: 241961: 221962: 111963: 211964: 181965: 251966: 201967: 281968: 241969: 321970: 321971: 231972: 261973: 191974: 121975: 131976: 391977: 351978: 171979: 261980: 271981: 291982: 211983: 151984: 311985: 151986: 151987: 301988: 261989: 171990: 11991: 61992: 41993: 271994: 121995: 51996: 181997: 111998: 231999: 112000: 52001: 42002: 222003: 142004: 252005: 132006: 62007: 62008: 152009: 92010: 232011: 112012: 102013: 262014: 22015: 52016: 32017: 72018: 202019: 122020: 262021: 102022: 192023: 242024: 392025: 942026: 251951195919671975198319911999200720152023
1,464 records at Irozaki still stand. 2025 holds the most, with 94.
Standing records at Irozaki by the year they were set
Year setStanding records
195112
195210
195320
195437
195510
195626
195716
195825
195922
196024
196122
196211
196321
196418
196525
196620
196728
196824
196932
197032
197123
197226
197319
197412
197513
197639
197735
197817
197926
198027
198129
198221
198315
198431
198515
198615
198730
198826
198917
19901
19916
19924
199327
199412
19955
199618
199711
199823
199911
20005
20014
200222
200314
200425
200513
20066
20076
200815
20099
201023
201111
201210
201326
20142
20155
20163
20177
201820
201912
202026
202110
202219
202324
202439
202594
202625

All-Time Record Progression

5 new records
When Irozaki set new all-time records 5 all-time records were set at Irozaki between 26 February 1981 and 18 August 2024. Each dot is a new record. Record low maximum temperatureRecord low minimum temperatureRecord high maximum temperatureRecord high minimum temperature26 February 1981: Record low maximum temperature 1.7 C (35.1 F)26 February 1981: Record low minimum temperature -2.7 C (27.1 F)4 August 1990: Record high maximum temperature 33.4 C (92.1 F)20 July 2004: Record high maximum temperature 33.9 C (93.0 F)18 August 2024: Record high minimum temperature 27.9 C (82.2 F)1990200020102020
5 all-time records were set at Irozaki between 26 February 1981 and 18 August 2024. Each dot is a new record.
When Irozaki set new all-time records
DateKindDetail
1981-02-26Record low maximum temperatureRecord low maximum temperature 1.7 C (35.1 F)
1981-02-26Record low minimum temperatureRecord low minimum temperature -2.7 C (27.1 F)
1990-08-04Record high maximum temperatureRecord high maximum temperature 33.4 C (92.1 F)
2004-07-20Record high maximum temperatureRecord high maximum temperature 33.9 C (93.0 F)
2024-08-18Record high minimum temperatureRecord high minimum temperature 27.9 C (82.2 F)

Wettest Day of Each Month

Sep: 290.0 mm (11.4 in)
Record daily precipitation for each month at Irozaki The wettest day on record for each calendar month at Irozaki. The most was 290.0 mm (11.4 in) on 29 September 1970. 0100200300 Jan: 125.0 mm (4.9 in), 14 January 2006 Jan Feb: 128.5 mm (5.1 in), 17 February 1989 Feb Mar: 106.9 mm (4.2 in), 23 March 1991 Mar Apr: 145.0 mm (5.7 in), 12 April 2006 Apr May: 146.1 mm (5.8 in), 15 May 1995 May Jun: 212.1 mm (8.4 in), 18 June 2024 Jun Jul: 257.5 mm (10.1 in), 11 July 1976 Jul Aug: 222.0 mm (8.7 in), 15 August 2003 Aug Sep: 290.0 mm (11.4 in), 29 September 1970 Sep Oct: 214.0 mm (8.4 in), 22 October 1981 Oct Nov: 155.4 mm (6.1 in), 30 November 2003 Nov Dec: 80.5 mm (3.2 in), 12 December 1968 Dec
The wettest day on record for each calendar month at Irozaki. The most was 290.0 mm (11.4 in) on 29 September 1970.
Record daily precipitation for each month at Irozaki
MonthRecord daily precipitation (mm)Date
Jan125.0 mm (4.9 in)14 January 2006
Feb128.5 mm (5.1 in)17 February 1989
Mar106.9 mm (4.2 in)23 March 1991
Apr145.0 mm (5.7 in)12 April 2006
May146.1 mm (5.8 in)15 May 1995
Jun212.1 mm (8.4 in)18 June 2024
Jul257.5 mm (10.1 in)11 July 1976
Aug222.0 mm (8.7 in)15 August 2003
Sep290.0 mm (11.4 in)29 September 1970
Oct214.0 mm (8.4 in)22 October 1981
Nov155.4 mm (6.1 in)30 November 2003
Dec80.5 mm (3.2 in)12 December 1968

Period of Record Coverage

1951 to 2026
Days with data per year at Irozaki 76 years of record at Irozaki, 1951 to 2026. 27 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 and others. 1951: 365 of 365 days1952: 366 of 366 days1953: 357 of 365 days1954: 361 of 365 days1955: 356 of 365 days1956: 362 of 366 days1957: 357 of 365 days1958: 361 of 365 days1959: 359 of 365 days1960: 355 of 366 days1961: 356 of 365 days1962: 359 of 365 days1963: 357 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: 5 of 365 days1991: 263 of 365 days1992: 320 of 366 days1993: 319 of 365 days1994: 325 of 365 days1995: 307 of 365 days1996: 324 of 366 days1997: 312 of 365 days1998: 301 of 365 days1999: 304 of 365 days2000: 328 of 366 days2001: 273 of 365 days2002: 314 of 365 days2003: 317 of 365 days2004: 312 of 366 days2005: 331 of 365 days2006: 328 of 365 days2007: 331 of 365 days2008: 338 of 366 days2009: 342 of 365 days2010: 335 of 365 days2011: 340 of 365 days2012: 338 of 366 days2013: 328 of 365 days2014: 335 of 365 days2015: 325 of 365 days2016: 323 of 366 days2017: 337 of 365 days2018: 328 of 365 days2019: 323 of 365 days2020: 296 of 366 days2021: 304 of 365 days2022: 327 of 365 days2023: 251 of 365 days2024: 277 of 366 days2025: 352 of 365 days2026: 273 of 365 days1960197019801990200020102020
76 years of record at Irozaki, 1951 to 2026. 27 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 and others.
Days with data per year at Irozaki
YearDays with dataShare of yearComplete
1951365100%Yes
1952366100%Yes
195335798%Yes
195436199%Yes
195535698%Yes
195636299%Yes
195735798%Yes
195836199%Yes
195935998%Yes
196035597%Yes
196135698%Yes
196235998%Yes
196335798%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
199051%No
199126372%No
199232087%No
199331987%No
199432589%No
199530784%No
199632489%No
199731285%No
199830182%No
199930483%No
200032890%No
200127375%No
200231486%No
200331787%No
200431285%No
200533191%Yes
200632890%No
200733191%Yes
200833892%Yes
200934294%Yes
201033592%Yes
201134093%Yes
201233892%Yes
201332890%No
201433592%Yes
201532589%No
201632388%No
201733792%Yes
201832890%No
201932388%No
202029681%No
202130483%No
202232790%No
202325169%No
202427776%No
202535296%Yes
202627375%No

Latest Records

20
Latest records at Irozaki
DateStationRecordValueBeat old record byOld record stoodSignificance
4 October 2026Irozaki, JPmonthly rain (Provisional)275.5 mm (10.8 in)61.5 mm (2.4 in)44 years56 of 100 (Notable)
16 September 2026Irozaki, JPdaily rain (Provisional)214.0 mm (8.4 in)139.5 mm (5.5 in)53 years63 of 100 (Major)
8 September 2026Irozaki, JPdaily rain (Provisional)265.5 mm (10.5 in)167.0 mm (6.6 in)48 years61 of 100 (Major)
4 September 2026Irozaki, JPall-time rain (Provisional)436.0 mm (17.2 in)93.0 mm (3.7 in)0 years63 of 100 (Major)
3 September 2026Irozaki, JPdaily rain (Provisional)233.5 mm (9.2 in)201.5 mm (7.9 in)64 years66 of 100 (Major)
2 September 2026Irozaki, JPall-time rain (Provisional)343.0 mm (13.5 in)53.0 mm (2.1 in)55 years64 of 100 (Major)
25 August 2026Irozaki, JPdaily high min (Provisional)26.9 C (80.4 F)0.2 C (0.4 F)8 years10 of 100 (Routine)
24 August 2026Irozaki, JPdaily high min (Provisional)26.6 C (79.9 F)0.1 C (0.2 F)0 years7 of 100 (Routine)
25 July 2026Irozaki, JPdaily high min (Tie)26.4 C (79.5 F)tie0 years1 of 100 (Routine)
24 July 2026Irozaki, JPdaily high min27.1 C (80.8 F)0.6 C (1.1 F)0 years9 of 100 (Routine)
23 July 2026Irozaki, JPdaily high max32.9 C (91.2 F)0.8 C (1.4 F)8 years12 of 100 (Routine)
23 July 2026Irozaki, JPdaily high min26.9 C (80.4 F)0.2 C (0.4 F)8 years9 of 100 (Routine)
22 July 2026Irozaki, JPmonthly high min27.2 C (81.0 F)0.4 C (0.7 F)8 years20 of 100 (Routine)
8 July 2026Irozaki, JPdaily rain60.0 mm (2.4 in)23.0 mm (0.9 in)51 years30 of 100 (Routine)
1 June 2026Irozaki, JPdaily high max25.8 C (78.4 F)0.3 C (0.5 F)28 years16 of 100 (Routine)
31 May 2026Irozaki, JPdaily high min20.4 C (68.7 F)0.2 C (0.4 F)63 years26 of 100 (Routine)
29 May 2026Irozaki, JPdaily high max26.2 C (79.2 F)0.2 C (0.4 F)4 years8 of 100 (Routine)
28 May 2026Irozaki, JPdaily high min20.9 C (69.6 F)0.8 C (1.4 F)44 years24 of 100 (Routine)
20 May 2026Irozaki, JPdaily high max25.6 C (78.1 F)1.1 C (2.0 F)0 years12 of 100 (Routine)
19 May 2026Irozaki, JPdaily high min20.4 C (68.7 F)1.8 C (3.2 F)72 years37 of 100 (Notable)

Climate Trend

40 complete years, 1951 to 2025
Annual mean temperature at Irozaki as warming stripes, 1951 to 2025 One stripe for each of 40 complete years at Irozaki, 1951 to 2025. Blue stripes are years cooler than the station's own mean of 16.5 C (61.6 F); red stripes are warmer. The coolest year was 1984, at 15.6 C (60.1 F), and the warmest was 2025, at 18.1 C (64.7 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1951: 16.5 C, +0.1 C from the station mean1952: 16.4 C, -0.1 C from the station mean1953: 16.3 C, -0.1 C from the station mean1954: 16.6 C, +0.1 C from the station mean1955: 16.9 C, +0.5 C from the station mean1956: 16.1 C, -0.3 C from the station mean1957: 16.2 C, -0.3 C from the station mean1958: 16.5 C, +0.1 C from the station mean1959: 17.1 C, +0.6 C from the station mean1960: 17.0 C, +0.6 C from the station mean1961: 17.2 C, +0.8 C from the station mean1962: 16.6 C, +0.1 C from the station mean1963: 15.8 C, -0.6 C from the station mean1964: 16.2 C, -0.3 C from the station mean1965: 15.8 C, -0.6 C from the station mean1966: 16.6 C, +0.1 C from the station mean1967: 16.4 C, 0.0 C from the station mean1968: 16.1 C, -0.3 C from the station mean1969: 16.3 C, -0.2 C from the station mean1970: 15.9 C, -0.6 C from the station mean1971: 16.1 C, -0.4 C from the station mean1972: 16.8 C, +0.4 C from the station mean1973: 16.5 C, +0.1 C from the station mean1974: 16.1 C, -0.4 C from the station mean1975: 16.3 C, -0.2 C from the station mean1976: 16.1 C, -0.3 C from the station mean1977: 16.7 C, +0.3 C from the station mean1978: 16.8 C, +0.3 C from the station mean1979: 17.3 C, +0.9 C from the station mean1980: 16.1 C, -0.3 C from the station mean1981: 16.0 C, -0.5 C from the station mean1982: 16.4 C, 0.0 C from the station mean1983: 16.3 C, -0.2 C from the station mean1984: 15.6 C, -0.9 C from the station mean1985: 16.4 C, -0.1 C from the station mean1986: 16.0 C, -0.4 C from the station mean1987: 17.0 C, +0.6 C from the station mean1988: 16.2 C, -0.3 C from the station mean1989: 16.9 C, +0.4 C from the station mean2025: 18.1 C, +1.7 C from the station mean19511960197019801990200020102020
One stripe for each of 40 complete years at Irozaki, 1951 to 2025. Blue stripes are years cooler than the station's own mean of 16.5 C (61.6 F); red stripes are warmer. The coolest year was 1984, at 15.6 C (60.1 F), and the warmest was 2025, at 18.1 C (64.7 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Irozaki as warming stripes, 1951 to 2025
YearAnnual mean temperatureDifference from the station mean
195116.5 C+0.08 C
195216.4 C-0.08 C
195316.3 C-0.13 C
195416.6 C+0.12 C
195516.9 C+0.47 C
195616.1 C-0.32 C
195716.2 C-0.26 C
195816.5 C+0.05 C
195917.1 C+0.62 C
196017.0 C+0.58 C
196117.2 C+0.76 C
196216.6 C+0.10 C
196315.8 C-0.62 C
196416.2 C-0.26 C
196515.8 C-0.63 C
196616.6 C+0.09 C
196716.4 C-0.02 C
196816.1 C-0.34 C
196916.3 C-0.20 C
197015.9 C-0.59 C
197116.1 C-0.38 C
197216.8 C+0.37 C
197316.5 C+0.06 C
197416.1 C-0.36 C
197516.3 C-0.16 C
197616.1 C-0.35 C
197716.7 C+0.25 C
197816.8 C+0.29 C
197917.3 C+0.86 C
198016.1 C-0.35 C
198116.0 C-0.51 C
198216.4 C-0.05 C
198316.3 C-0.20 C
198415.6 C-0.87 C
198516.4 C-0.10 C
198616.0 C-0.42 C
198717.0 C+0.57 C
198816.2 C-0.31 C
198916.9 C+0.41 C
202518.1 C+1.68 C

The fitted trend in annual mean temperature here over 1951 to 2025 is 0.09 C (-0.02 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.16 F (-0.04 to 0.35) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Irozaki
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.09 C (-0.02 to 0.20) per decade0.16 F (-0.04 to 0.35) per decade1951 to 202540Not clearly different from zero
Mean daily maximum0.09 C (-0.02 to 0.20) per decade0.15 F (-0.04 to 0.35) per decade1951 to 202540Not clearly different from zero
Mean daily minimum0.09 C (-0.02 to 0.20) per decade0.16 F (-0.04 to 0.36) per decade1951 to 202540Not 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

1951 to 2026
Yearly extremes at Irozaki: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)33.9 C (93.0 F)200431.1 C (88.0 F)76
Coldest night (TNn)-2.7 C (27.1 F)19810.8 C (33.4 F)76
Wettest day (Rx1day)436.0 mm (17.2 in)2026116.5 mm (4.6 in)76
Wettest five days (Rx5day)1,047.0 mm (41.2 in)2026175.1 mm (6.9 in)64
Longest dry spell (CDD)31 days201116 days72

Hottest day (TXx)

Hottest day (TXx) at Irozaki by year The hottest day of the year at Irozaki, 1951 to 2026. The record is 33.9 C (93.0 F) in 2004, marked on the chart; the median year is 31.1 C (88.0 F). 283032341960198020002020Record: 33.9 C (93.0 F) in 2004
The hottest day of the year at Irozaki, 1951 to 2026. The record is 33.9 C (93.0 F) in 2004, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Irozaki by year
YearHottest day (TXx)
195131.0 C (87.8 F)
195230.8 C (87.4 F)
195331.7 C (89.1 F)
195431.1 C (88.0 F)
195530.7 C (87.3 F)
195631.1 C (88.0 F)
195730.5 C (86.9 F)
195830.1 C (86.2 F)
195930.1 C (86.2 F)
196031.1 C (88.0 F)
196131.2 C (88.2 F)
196232.3 C (90.1 F)
196329.6 C (85.3 F)
196430.3 C (86.5 F)
196530.7 C (87.3 F)
196632.6 C (90.7 F)
196730.6 C (87.1 F)
196829.5 C (85.1 F)
196930.6 C (87.1 F)
197030.3 C (86.5 F)
197131.2 C (88.2 F)
197230.5 C (86.9 F)
197330.6 C (87.1 F)
197429.4 C (84.9 F)
197530.8 C (87.4 F)
197630.8 C (87.4 F)
197730.6 C (87.1 F)
197832.0 C (89.6 F)
197931.3 C (88.3 F)
198030.2 C (86.4 F)
198130.7 C (87.3 F)
198231.0 C (87.8 F)
198331.9 C (89.4 F)
198430.7 C (87.3 F)
198531.1 C (88.0 F)
198631.0 C (87.8 F)
198731.5 C (88.7 F)
198830.0 C (86.0 F)
198930.2 C (86.4 F)
199033.4 C (92.1 F)
199131.1 C (88.0 F)
199230.4 C (86.7 F)
199329.6 C (85.3 F)
199433.1 C (91.6 F)
199531.3 C (88.3 F)
199630.7 C (87.3 F)
199730.7 C (87.3 F)
199831.5 C (88.7 F)
199930.8 C (87.4 F)
200031.3 C (88.3 F)
200131.6 C (88.9 F)
200231.3 C (88.3 F)
200330.6 C (87.1 F)
200433.9 C (93.0 F)
200531.7 C (89.1 F)
200631.3 C (88.3 F)
200731.5 C (88.7 F)
200832.5 C (90.5 F)
200930.1 C (86.2 F)
201031.8 C (89.2 F)
201131.5 C (88.7 F)
201231.5 C (88.7 F)
201332.9 C (91.2 F)
201430.1 C (86.2 F)
201532.6 C (90.7 F)
201632.4 C (90.3 F)
201731.8 C (89.2 F)
201832.1 C (89.8 F)
201931.5 C (88.7 F)
202033.6 C (92.5 F)
202131.6 C (88.9 F)
202231.6 C (88.9 F)
202332.5 C (90.5 F)
202433.8 C (92.8 F)
202532.9 C (91.2 F)
202632.9 C (91.2 F)

Coldest night (TNn)

Coldest night (TNn) at Irozaki by year The coldest night of the year at Irozaki, 1951 to 2026. The record is -2.7 C (27.1 F) in 1981, marked on the chart; the median year is 0.8 C (33.4 F). -50510151960198020002020Record: -2.7 C (27.1 F) in 1981
The coldest night of the year at Irozaki, 1951 to 2026. The record is -2.7 C (27.1 F) in 1981, marked on the chart; the median year is 0.8 C (33.4 F).
Coldest night (TNn) at Irozaki by year
YearColdest night (TNn)
19510.8 C (33.4 F)
19520.4 C (32.7 F)
19530.0 C (32.0 F)
19541.2 C (34.2 F)
19550.5 C (32.9 F)
19561.2 C (34.2 F)
19571.5 C (34.7 F)
19580.7 C (33.3 F)
19590.0 C (32.0 F)
1960-0.3 C (31.5 F)
19611.4 C (34.5 F)
19621.9 C (35.4 F)
1963-2.1 C (28.2 F)
19640.9 C (33.6 F)
19650.1 C (32.2 F)
19660.1 C (32.2 F)
1967-0.7 C (30.7 F)
19680.2 C (32.4 F)
19691.0 C (33.8 F)
1970-0.1 C (31.8 F)
19711.4 C (34.5 F)
19722.4 C (36.3 F)
19730.6 C (33.1 F)
1974-0.2 C (31.6 F)
19750.5 C (32.9 F)
19760.8 C (33.4 F)
1977-1.2 C (29.8 F)
19780.1 C (32.2 F)
19792.4 C (36.3 F)
19800.5 C (32.9 F)
1981-2.7 C (27.1 F)
1982-0.1 C (31.8 F)
19830.6 C (33.1 F)
1984-1.7 C (28.9 F)
19850.2 C (32.4 F)
19860.3 C (32.5 F)
19871.5 C (34.7 F)
19880.9 C (33.6 F)
19892.1 C (35.8 F)
199015.0 C (59.0 F)
19911.9 C (35.4 F)
19921.4 C (34.5 F)
19932.5 C (36.5 F)
19941.6 C (34.9 F)
19951.7 C (35.1 F)
19960.8 C (33.4 F)
1997-1.4 C (29.5 F)
19980.8 C (33.4 F)
1999-0.6 C (30.9 F)
20001.3 C (34.3 F)
20011.0 C (33.8 F)
20021.4 C (34.5 F)
2003-1.4 C (29.5 F)
20040.2 C (32.4 F)
20050.8 C (33.4 F)
2006-0.8 C (30.6 F)
20073.0 C (37.4 F)
20081.1 C (34.0 F)
20090.8 C (33.4 F)
20101.0 C (33.8 F)
20110.3 C (32.5 F)
20120.3 C (32.5 F)
20131.6 C (34.9 F)
20141.7 C (35.1 F)
20151.9 C (35.4 F)
2016-0.4 C (31.3 F)
20170.8 C (33.4 F)
2018-0.1 C (31.8 F)
20192.6 C (36.7 F)
20202.6 C (36.7 F)
20211.0 C (33.8 F)
20221.9 C (35.4 F)
2023-0.7 C (30.7 F)
20242.6 C (36.7 F)
20251.4 C (34.5 F)
2026-0.6 C (30.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Irozaki by year The wettest day of the year at Irozaki, 1951 to 2026. The record is 436.0 mm (17.2 in) in 2026, marked on the chart; the median year is 116.5 mm (4.6 in). 01002003004005001960198020002020Record: 436.0 mm (17.2 in) in 2026
The wettest day of the year at Irozaki, 1951 to 2026. The record is 436.0 mm (17.2 in) in 2026, marked on the chart; the median year is 116.5 mm (4.6 in).
Wettest day (Rx1day) at Irozaki by year
YearWettest day (Rx1day)
1951154.2 mm (6.1 in)
1952105.0 mm (4.1 in)
1953102.6 mm (4.0 in)
195497.2 mm (3.8 in)
195579.3 mm (3.1 in)
195695.6 mm (3.8 in)
1957126.3 mm (5.0 in)
1958174.6 mm (6.9 in)
1959143.3 mm (5.6 in)
1960126.3 mm (5.0 in)
196176.5 mm (3.0 in)
1962106.3 mm (4.2 in)
1963153.1 mm (6.0 in)
196475.1 mm (3.0 in)
196580.5 mm (3.2 in)
1966191.4 mm (7.5 in)
1967118.1 mm (4.6 in)
1968129.0 mm (5.1 in)
196981.5 mm (3.2 in)
1970290.0 mm (11.4 in)
1971163.0 mm (6.4 in)
1972179.0 mm (7.0 in)
1973117.5 mm (4.6 in)
1974154.5 mm (6.1 in)
197591.5 mm (3.6 in)
1976257.5 mm (10.1 in)
1977113.0 mm (4.4 in)
1978102.0 mm (4.0 in)
197992.0 mm (3.6 in)
1980127.5 mm (5.0 in)
1981214.0 mm (8.4 in)
1982177.0 mm (7.0 in)
1983186.5 mm (7.3 in)
1984110.0 mm (4.3 in)
1985101.0 mm (4.0 in)
198685.5 mm (3.4 in)
198769.0 mm (2.7 in)
1988115.5 mm (4.5 in)
1989173.5 mm (6.8 in)
199095.0 mm (3.7 in)
1991140.0 mm (5.5 in)
1992106.9 mm (4.2 in)
1993235.0 mm (9.3 in)
199458.9 mm (2.3 in)
1995146.1 mm (5.8 in)
199690.9 mm (3.6 in)
1997105.9 mm (4.2 in)
199897.0 mm (3.8 in)
1999142.0 mm (5.6 in)
200078.0 mm (3.1 in)
200154.1 mm (2.1 in)
200285.1 mm (3.4 in)
2003222.0 mm (8.7 in)
2004103.1 mm (4.1 in)
2005151.1 mm (5.9 in)
2006171.2 mm (6.7 in)
2007141.0 mm (5.6 in)
2008122.2 mm (4.8 in)
2009113.0 mm (4.4 in)
201086.1 mm (3.4 in)
201179.0 mm (3.1 in)
2012121.9 mm (4.8 in)
201379.0 mm (3.1 in)
201478.5 mm (3.1 in)
2015105.9 mm (4.2 in)
2016124.0 mm (4.9 in)
2017182.1 mm (7.2 in)
201879.0 mm (3.1 in)
2019185.9 mm (7.3 in)
2020205.0 mm (8.1 in)
2021206.0 mm (8.1 in)
2022133.6 mm (5.3 in)
202362.0 mm (2.4 in)
2024212.1 mm (8.4 in)
202558.0 mm (2.3 in)
2026436.0 mm (17.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Irozaki by year The wettest five days of the year at Irozaki, 1951 to 2026. The record is 1,047.0 mm (41.2 in) in 2026, marked on the chart; the median year is 175.1 mm (6.9 in). 05001,0001,5001960198020002020Record: 1,047.0 mm (41.2 in) in 2026
The wettest five days of the year at Irozaki, 1951 to 2026. The record is 1,047.0 mm (41.2 in) in 2026, marked on the chart; the median year is 175.1 mm (6.9 in).
Wettest five days (Rx5day) at Irozaki by year
YearWettest five days (Rx5day)
1951199.8 mm (7.9 in)
1952200.3 mm (7.9 in)
1953163.5 mm (6.4 in)
1954165.4 mm (6.5 in)
1955146.8 mm (5.8 in)
1956134.9 mm (5.3 in)
1957226.5 mm (8.9 in)
1958274.9 mm (10.8 in)
1959166.7 mm (6.6 in)
1960136.6 mm (5.4 in)
1961119.1 mm (4.7 in)
1962146.9 mm (5.8 in)
1963242.3 mm (9.5 in)
1964156.3 mm (6.2 in)
1965135.3 mm (5.3 in)
1966265.5 mm (10.5 in)
1967150.2 mm (5.9 in)
1968222.5 mm (8.8 in)
1969163.5 mm (6.4 in)
1970291.0 mm (11.5 in)
1971178.0 mm (7.0 in)
1972305.0 mm (12.0 in)
1973129.0 mm (5.1 in)
1974195.0 mm (7.7 in)
1975153.5 mm (6.0 in)
1976281.0 mm (11.1 in)
1977204.0 mm (8.0 in)
1978125.0 mm (4.9 in)
1979204.5 mm (8.1 in)
1980164.5 mm (6.5 in)
1981214.0 mm (8.4 in)
1982462.5 mm (18.2 in)
1983420.5 mm (16.6 in)
1984216.5 mm (8.5 in)
1985164.5 mm (6.5 in)
1986111.0 mm (4.4 in)
1987170.5 mm (6.7 in)
1988223.5 mm (8.8 in)
1989227.5 mm (9.0 in)
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999172.2 mm (6.8 in)
2000n/a
2001n/a
2002131.1 mm (5.2 in)
2003300.7 mm (11.8 in)
2004158.2 mm (6.2 in)
2005n/a
2006148.8 mm (5.9 in)
2007288.3 mm (11.4 in)
2008155.7 mm (6.1 in)
2009146.1 mm (5.8 in)
2010143.0 mm (5.6 in)
2011145.6 mm (5.7 in)
2012200.9 mm (7.9 in)
2013171.2 mm (6.7 in)
2014145.5 mm (5.7 in)
2015305.0 mm (12.0 in)
2016146.1 mm (5.8 in)
2017209.0 mm (8.2 in)
2018194.1 mm (7.6 in)
2019198.3 mm (7.8 in)
2020298.0 mm (11.7 in)
2021342.7 mm (13.5 in)
2022215.6 mm (8.5 in)
2023108.4 mm (4.3 in)
2024304.0 mm (12.0 in)
202531.0 mm (1.2 in)
20261,047.0 mm (41.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Irozaki by year The longest dry spell of the year at Irozaki, 1951 to 2026. The record is 31 days in 2011, marked on the chart; the median year is 16 days. 0102030401960198020002020Record: 31 days in 2011
The longest dry spell of the year at Irozaki, 1951 to 2026. The record is 31 days in 2011, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Irozaki by year
YearLongest dry spell (CDD)
195125 days
195213 days
195314 days
195418 days
195518 days
195625 days
195712 days
195813 days
195916 days
196022 days
196118 days
196226 days
196318 days
196424 days
196522 days
196613 days
196724 days
196816 days
196921 days
197023 days
197119 days
197212 days
197327 days
197420 days
197515 days
197618 days
197716 days
197810 days
197925 days
198015 days
198113 days
198216 days
198321 days
198413 days
198524 days
198618 days
198713 days
198822 days
198919 days
1990n/a
19911 day
19921 day
19931 day
1994n/a
19951 day
19961 day
19971 day
19982 days
199910 days
2000n/a
2001n/a
20022 days
20032 days
20041 day
20053 days
20062 days
20071 day
200819 days
200913 days
201026 days
201131 days
201218 days
201318 days
201421 days
201524 days
201617 days
201717 days
201819 days
201916 days
202011 days
202111 days
202214 days
202320 days
202415 days
202513 days
202613 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

52 years, 1951 to 2022

A day with at least 117.8 mm (4.6 in) of rain is expected about once in 2 years. A day with at least 311.0 mm (12.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Irozaki: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years117.8 mm (4.6 in)
5 years160.6 mm (6.3 in)
10 years192.2 mm (7.6 in)
25 years236.3 mm (9.3 in)
50 years272.3 mm (10.7 in)
100 years311.0 mm (12.2 in)Longer than the 52 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, 52 years of values from 1951 to 2022.

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: 290.0 mm (11.4 in) in 1970; 257.5 mm (10.1 in) in 1976; 214.0 mm (8.4 in) in 1981.

Station Changes

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

Download the Data

  • Data for Irozaki standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Irozaki 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 (2026-10-16).