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Built 2026-10-15 (15 October 2026)

Yamaguchi Weather Records (JA000047784)

Record envelope, standing records and threshold days for Yamaguchi (JA000047784), Japan, with 60 years of record.

Key Facts for Yamaguchi

  • Yamaguchi (JA000047784) is a weather station in Japan at 34.17 latitude and 131.45 longitude, 18 m (59 ft) above sea level.
  • The station reports from 1967 to 2026, 60 years of record.
  • 1,464 records set at Yamaguchi still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Yamaguchi set a monthly record daily precipitation of 263.5 mm (10.4 in) on 29 September 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Japan, 34.17 latitude, 131.45 longitude.
  • Elevation: 18 m (59 ft).
  • Period of record: 1967 to 2026, 60 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

15 days at or beyond a record
Daily record high and record low at Yamaguchi, with 2026 drawn through them The band shows the record high and record low for each calendar day at Yamaguchi. The lines show the 2026 daily maximum and minimum. 15 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 Yamaguchi. The lines show the 2026 daily maximum and minimum. 15 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Yamaguchi, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.5 C (67.1 F)-7.6 C (18.3 F)17.4 C (63.3 F)-3.1 C (26.4 F)
Feb22.5 C (72.5 F)-8.9 C (16.0 F)19.6 C (67.3 F)-5.5 C (22.1 F)
Mar27.0 C (80.6 F)-7.6 C (18.3 F)20.2 C (68.4 F)-1.3 C (29.7 F)
Apr29.5 C (85.1 F)-1.2 C (29.8 F)25.8 C (78.4 F)2.1 C (35.8 F)
May33.8 C (92.8 F)3.2 C (37.8 F)32.4 C (90.3 F)7.5 C (45.5 F)
Jun35.3 C (95.5 F)8.0 C (46.4 F)31.1 C (88.0 F)14.1 C (57.4 F)
Jul38.8 C (101.8 F)14.1 C (57.4 F)37.5 C (99.5 F)18.6 C (65.5 F)
Aug39.0 C (102.2 F)14.9 C (58.8 F)39.0 C (102.2 F)22.4 C (72.3 F)
Sep36.6 C (97.9 F)7.4 C (45.3 F)34.8 C (94.6 F)16.2 C (61.2 F)
Oct31.5 C (88.7 F)1.3 C (34.3 F)28.6 C (83.5 F)14.1 C (57.4 F)
Nov28.1 C (82.6 F)-2.5 C (27.5 F)n/an/a
Dec23.3 C (73.9 F)-5.5 C (22.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Yamaguchi by the year they were set 1,464 records at Yamaguchi still stand. 2025 holds the most, with 62. 0204060801967: 261968: 391969: 511970: 381971: 441972: 401973: 361974: 401975: 131976: 491977: 371978: 191979: 231980: 431981: 461982: 341983: 271984: 221985: 191986: 201987: 281988: 121989: 301991: 11992: 61993: 251994: 191995: 101996: 231997: 181998: 171999: 152000: 92001: 92002: 152003: 162004: 212006: 132007: 212008: 112009: 192010: 262011: 182012: 52013: 242014: 142015: 152016: 212017: 162018: 392019: 192020: 282021: 382022: 302023: 252024: 362025: 622026: 441967197319791985199219982004201120172023
1,464 records at Yamaguchi still stand. 2025 holds the most, with 62.
Standing records at Yamaguchi by the year they were set
Year setStanding records
196726
196839
196951
197038
197144
197240
197336
197440
197513
197649
197737
197819
197923
198043
198146
198234
198327
198422
198519
198620
198728
198812
198930
19911
19926
199325
199419
199510
199623
199718
199817
199915
20009
20019
200215
200316
200421
200613
200721
200811
200919
201026
201118
20125
201324
201414
201515
201621
201716
201839
201919
202028
202138
202230
202325
202436
202562
202644

All-Time Record Progression

6 new records
When Yamaguchi set new all-time records 6 all-time records were set at Yamaguchi between 19 July 2018 and 3 August 2026. Each dot is a new record. Record high maximum temperatureRecord high minimum temperature19 July 2018: Record high maximum temperature 38.7 C (101.7 F)25 July 2018: Record high maximum temperature 38.8 C (101.8 F)21 August 2025: Record high minimum temperature 27.6 C (81.7 F)19 July 2026: Record high minimum temperature 27.8 C (82.0 F)2 August 2026: Record high minimum temperature 28.9 C (84.0 F)3 August 2026: Record high maximum temperature 39.0 C (102.2 F)20202025
6 all-time records were set at Yamaguchi between 19 July 2018 and 3 August 2026. Each dot is a new record.
When Yamaguchi set new all-time records
DateKindDetail
2018-07-19Record high maximum temperatureRecord high maximum temperature 38.7 C (101.7 F)
2018-07-25Record high maximum temperatureRecord high maximum temperature 38.8 C (101.8 F)
2025-08-21Record high minimum temperatureRecord high minimum temperature 27.6 C (81.7 F)
2026-07-19Record high minimum temperatureRecord high minimum temperature 27.8 C (82.0 F)
2026-08-02Record high minimum temperatureRecord high minimum temperature 28.9 C (84.0 F)
2026-08-03Record high maximum temperatureRecord high maximum temperature 39.0 C (102.2 F)

Wettest Day of Each Month

Jul: 297.0 mm (11.7 in)
Record daily precipitation for each month at Yamaguchi The wettest day on record for each calendar month at Yamaguchi. The most was 297.0 mm (11.7 in) on 11 July 1972. 0100200300 Jan: 62.5 mm (2.5 in), 12 January 2008 Jan Feb: 63.0 mm (2.5 in), 28 February 1976 Feb Mar: 93.0 mm (3.7 in), 10 March 2020 Mar Apr: 122.9 mm (4.8 in), 11 April 2006 Apr May: 169.9 mm (6.7 in), 10 May 2011 May Jun: 187.0 mm (7.4 in), 23 June 1985 Jun Jul: 297.0 mm (11.7 in), 11 July 1972 Jul Aug: 212.0 mm (8.3 in), 11 August 2026 Aug Sep: 230.1 mm (9.1 in), 19 September 2022 Sep Oct: 135.9 mm (5.4 in), 6 October 2017 Oct Nov: 150.9 mm (5.9 in), 2 November 2024 Nov Dec: 82.0 mm (3.2 in), 5 December 2004 Dec
The wettest day on record for each calendar month at Yamaguchi. The most was 297.0 mm (11.7 in) on 11 July 1972.
Record daily precipitation for each month at Yamaguchi
MonthRecord daily precipitation (mm)Date
Jan62.5 mm (2.5 in)12 January 2008
Feb63.0 mm (2.5 in)28 February 1976
Mar93.0 mm (3.7 in)10 March 2020
Apr122.9 mm (4.8 in)11 April 2006
May169.9 mm (6.7 in)10 May 2011
Jun187.0 mm (7.4 in)23 June 1985
Jul297.0 mm (11.7 in)11 July 1972
Aug212.0 mm (8.3 in)11 August 2026
Sep230.1 mm (9.1 in)19 September 2022
Oct135.9 mm (5.4 in)6 October 2017
Nov150.9 mm (5.9 in)2 November 2024
Dec82.0 mm (3.2 in)5 December 2004

Period of Record Coverage

1967 to 2026
Days with data per year at Yamaguchi 59 years of record at Yamaguchi, 1967 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1992, 2001, 2020, 2023, 2024, 2026. 1967: 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: 6 of 365 days1991: 7 of 365 days1992: 301 of 366 days1993: 357 of 365 days1994: 351 of 365 days1995: 347 of 365 days1996: 351 of 366 days1997: 332 of 365 days1998: 346 of 365 days1999: 333 of 365 days2000: 350 of 366 days2001: 296 of 365 days2002: 350 of 365 days2003: 351 of 365 days2004: 343 of 366 days2006: 352 of 365 days2007: 356 of 365 days2008: 359 of 366 days2009: 357 of 365 days2010: 361 of 365 days2011: 357 of 365 days2012: 355 of 366 days2013: 353 of 365 days2014: 361 of 365 days2015: 356 of 365 days2016: 350 of 366 days2017: 356 of 365 days2018: 352 of 365 days2019: 342 of 365 days2020: 326 of 366 days2021: 347 of 365 days2022: 353 of 365 days2023: 269 of 365 days2024: 298 of 366 days2025: 356 of 365 days2026: 274 of 365 days197019801990200020102020
59 years of record at Yamaguchi, 1967 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1990, 1991, 1992, 2001, 2020, 2023, 2024, 2026.
Days with data per year at Yamaguchi
YearDays with dataShare of yearComplete
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
199062%No
199172%No
199230182%No
199335798%Yes
199435196%Yes
199534795%Yes
199635196%Yes
199733291%Yes
199834695%Yes
199933391%Yes
200035096%Yes
200129681%No
200235096%Yes
200335196%Yes
200434394%Yes
200635296%Yes
200735698%Yes
200835998%Yes
200935798%Yes
201036199%Yes
201135798%Yes
201235597%Yes
201335397%Yes
201436199%Yes
201535698%Yes
201635096%Yes
201735698%Yes
201835296%Yes
201934294%Yes
202032689%No
202134795%Yes
202235397%Yes
202326974%No
202429881%No
202535698%Yes
202627475%No

Latest Records

20
Latest records at Yamaguchi
DateStationRecordValueBeat old record byOld record stoodSignificance
29 September 2026Yamaguchi, JPmonthly rain (Provisional)263.5 mm (10.4 in)33.4 mm (1.3 in)4 years30 of 100 (Routine)
23 September 2026Yamaguchi, JPdaily rain (Provisional)70.0 mm (2.8 in)9.0 mm (0.35 in)31 years18 of 100 (Routine)
15 September 2026Yamaguchi, JPdaily rain (Provisional)70.5 mm (2.8 in)27.5 mm (1.1 in)48 years31 of 100 (Routine)
12 September 2026Yamaguchi, JPdaily high min (Provisional)25.2 C (77.4 F)1.1 C (2.0 F)23 years15 of 100 (Routine)
11 September 2026Yamaguchi, JPdaily rain (Provisional)157.5 mm (6.2 in)101.5 mm (4.0 in)43 years58 of 100 (Notable)
8 September 2026Yamaguchi, JPdaily rain (Provisional)151.5 mm (6.0 in)25.5 mm (1.0 in)52 years31 of 100 (Routine)
7 September 2026Yamaguchi, JPdaily rain (Provisional)210.5 mm (8.3 in)123.4 mm (4.9 in)8 years48 of 100 (Notable)
4 September 2026Yamaguchi, JPdaily rain (Provisional)132.5 mm (5.2 in)71.5 mm (2.8 in)12 years38 of 100 (Notable)
4 September 2026Yamaguchi, JPdaily low max (Provisional)24.4 C (75.9 F)0.4 C (0.7 F)32 years16 of 100 (Routine)
2 September 2026Yamaguchi, JPdaily high max (Tie, Provisional)34.8 C (94.6 F)tie1 year1 of 100 (Routine)
1 September 2026Yamaguchi, JPmonthly high min (Provisional)27.1 C (80.8 F)0.3 C (0.5 F)6 years18 of 100 (Routine)
31 August 2026Yamaguchi, JPdaily high min (Provisional)27.2 C (81.0 F)0.5 C (0.9 F)44 years21 of 100 (Routine)
29 August 2026Yamaguchi, JPdaily high min (Provisional)26.8 C (80.2 F)0.4 C (0.7 F)16 years12 of 100 (Routine)
28 August 2026Yamaguchi, JPdaily high min (Provisional)26.9 C (80.4 F)1.2 C (2.2 F)57 years29 of 100 (Routine)
27 August 2026Yamaguchi, JPdaily high min (Provisional)27.6 C (81.7 F)0.5 C (0.9 F)5 years9 of 100 (Routine)
26 August 2026Yamaguchi, JPall-time high min (Tie, Provisional)28.9 C (84.0 F)tie0 years6 of 100 (Routine)
25 August 2026Yamaguchi, JPdaily high min (Provisional)28.4 C (83.1 F)1.6 C (2.9 F)5 years15 of 100 (Routine)
25 August 2026Yamaguchi, JPdaily high max (Provisional)36.0 C (96.8 F)0.1 C (0.2 F)0 years6 of 100 (Routine)
23 August 2026Yamaguchi, JPdaily high max (Provisional)36.9 C (98.4 F)0.4 C (0.7 F)8 years9 of 100 (Routine)
22 August 2026Yamaguchi, JPmonthly rain (Provisional)232.5 mm (9.2 in)20.5 mm (0.8 in)0 years23 of 100 (Routine)

Climate Trend

24 complete years, 1967 to 2025
Annual mean temperature at Yamaguchi as warming stripes, 1967 to 2025 One stripe for each of 24 complete years at Yamaguchi, 1967 to 2025. Blue stripes are years cooler than the station's own mean of 15.1 C (59.1 F); red stripes are warmer. The coolest year was 1976, at 14.3 C (57.7 F), and the warmest was 2025, at 17.0 C (62.6 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1967: 15.0 C, 0.0 C from the station mean1968: 14.5 C, -0.5 C from the station mean1969: 14.7 C, -0.3 C from the station mean1970: 14.7 C, -0.4 C from the station mean1971: 14.8 C, -0.3 C from the station mean1972: 15.0 C, 0.0 C from the station mean1973: 15.1 C, +0.1 C from the station mean1974: 14.5 C, -0.5 C from the station mean1975: 15.3 C, +0.2 C from the station mean1976: 14.3 C, -0.8 C from the station mean1977: 15.0 C, 0.0 C from the station mean1978: 15.5 C, +0.4 C from the station mean1979: 15.5 C, +0.4 C from the station mean1980: 14.4 C, -0.7 C from the station mean1981: 14.5 C, -0.5 C from the station mean1982: 15.1 C, 0.0 C from the station mean1983: 15.3 C, +0.3 C from the station mean1984: 14.9 C, -0.2 C from the station mean1985: 15.3 C, +0.3 C from the station mean1986: 14.7 C, -0.4 C from the station mean1987: 15.5 C, +0.4 C from the station mean1988: 15.0 C, -0.1 C from the station mean1989: 15.7 C, +0.7 C from the station mean2025: 17.0 C, +2.0 C from the station mean196719751980198519901995200020052010201520202025
One stripe for each of 24 complete years at Yamaguchi, 1967 to 2025. Blue stripes are years cooler than the station's own mean of 15.1 C (59.1 F); red stripes are warmer. The coolest year was 1976, at 14.3 C (57.7 F), and the warmest was 2025, at 17.0 C (62.6 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Yamaguchi as warming stripes, 1967 to 2025
YearAnnual mean temperatureDifference from the station mean
196715.0 C-0.01 C
196814.5 C-0.52 C
196914.7 C-0.32 C
197014.7 C-0.40 C
197114.8 C-0.30 C
197215.0 C-0.01 C
197315.1 C+0.07 C
197414.5 C-0.53 C
197515.3 C+0.23 C
197614.3 C-0.80 C
197715.0 C-0.04 C
197815.5 C+0.40 C
197915.5 C+0.43 C
198014.4 C-0.68 C
198114.5 C-0.52 C
198215.1 C+0.03 C
198315.3 C+0.28 C
198414.9 C-0.16 C
198515.3 C+0.26 C
198614.7 C-0.40 C
198715.5 C+0.44 C
198815.0 C-0.06 C
198915.7 C+0.68 C
202517.0 C+1.96 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

1967 to 2026
Yearly extremes at Yamaguchi: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.0 C (102.2 F)202635.5 C (95.9 F)59
Coldest night (TNn)-8.9 C (16.0 F)1977-4.6 C (23.7 F)59
Wettest day (Rx1day)297.0 mm (11.7 in)1972129.0 mm (5.1 in)59
Wettest five days (Rx5day)680.0 mm (26.8 in)2026217.4 mm (8.6 in)53
Longest dry spell (CDD)29 days198616 days55

Hottest day (TXx)

Hottest day (TXx) at Yamaguchi by year The hottest day of the year at Yamaguchi, 1967 to 2026. The record is 39.0 C (102.2 F) in 2026, marked on the chart; the median year is 35.5 C (95.9 F). 3234363840197019801990200020102020Record: 39.0 C (102.2 F) in 2026
The hottest day of the year at Yamaguchi, 1967 to 2026. The record is 39.0 C (102.2 F) in 2026, marked on the chart; the median year is 35.5 C (95.9 F).
Hottest day (TXx) at Yamaguchi by year
YearHottest day (TXx)
196736.2 C (97.2 F)
196834.4 C (93.9 F)
196934.4 C (93.9 F)
197035.4 C (95.7 F)
197134.6 C (94.3 F)
197234.3 C (93.7 F)
197335.1 C (95.2 F)
197434.0 C (93.2 F)
197534.0 C (93.2 F)
197633.4 C (92.1 F)
197734.8 C (94.6 F)
197835.7 C (96.3 F)
197934.6 C (94.3 F)
198033.9 C (93.0 F)
198135.4 C (95.7 F)
198234.8 C (94.6 F)
198337.5 C (99.5 F)
198437.0 C (98.6 F)
198535.1 C (95.2 F)
198635.3 C (95.5 F)
198734.7 C (94.5 F)
198834.2 C (93.6 F)
198934.4 C (93.9 F)
199035.0 C (95.0 F)
199132.5 C (90.5 F)
199235.1 C (95.2 F)
199333.2 C (91.8 F)
199438.4 C (101.1 F)
199536.2 C (97.2 F)
199635.3 C (95.5 F)
199735.5 C (95.9 F)
199835.3 C (95.5 F)
199935.0 C (95.0 F)
200036.6 C (97.9 F)
200137.2 C (99.0 F)
200236.4 C (97.5 F)
200336.1 C (97.0 F)
200435.4 C (95.7 F)
200636.6 C (97.9 F)
200736.4 C (97.5 F)
200836.6 C (97.9 F)
200934.9 C (94.8 F)
201036.0 C (96.8 F)
201135.5 C (95.9 F)
201235.9 C (96.6 F)
201338.4 C (101.1 F)
201436.9 C (98.4 F)
201537.2 C (99.0 F)
201637.8 C (100.0 F)
201737.6 C (99.7 F)
201838.8 C (101.8 F)
201938.0 C (100.4 F)
202038.6 C (101.5 F)
202137.9 C (100.2 F)
202237.1 C (98.8 F)
202337.8 C (100.0 F)
202438.8 C (101.8 F)
202537.5 C (99.5 F)
202639.0 C (102.2 F)

Coldest night (TNn)

Coldest night (TNn) at Yamaguchi by year The coldest night of the year at Yamaguchi, 1967 to 2026. The record is -8.9 C (16.0 F) in 1977, marked on the chart; the median year is -4.6 C (23.7 F). -100102030197019801990200020102020Record: -8.9 C (16.0 F) in 1977
The coldest night of the year at Yamaguchi, 1967 to 2026. The record is -8.9 C (16.0 F) in 1977, marked on the chart; the median year is -4.6 C (23.7 F).
Coldest night (TNn) at Yamaguchi by year
YearColdest night (TNn)
1967-6.6 C (20.1 F)
1968-8.5 C (16.7 F)
1969-4.6 C (23.7 F)
1970-6.4 C (20.5 F)
1971-6.7 C (19.9 F)
1972-3.8 C (25.2 F)
1973-5.2 C (22.6 F)
1974-5.8 C (21.6 F)
1975-7.1 C (19.2 F)
1976-6.7 C (19.9 F)
1977-8.9 C (16.0 F)
1978-6.5 C (20.3 F)
1979-3.6 C (25.5 F)
1980-5.4 C (22.3 F)
1981-7.9 C (17.8 F)
1982-4.6 C (23.7 F)
1983-5.0 C (23.0 F)
1984-5.0 C (23.0 F)
1985-4.8 C (23.4 F)
1986-4.8 C (23.4 F)
1987-5.0 C (23.0 F)
1988-5.5 C (22.1 F)
1989-2.7 C (27.1 F)
199016.1 C (61.0 F)
199121.0 C (69.8 F)
1992-1.9 C (28.6 F)
1993-3.5 C (25.7 F)
1994-2.3 C (27.9 F)
1995-3.6 C (25.5 F)
1996-6.6 C (20.1 F)
1997-3.8 C (25.2 F)
1998-3.7 C (25.3 F)
1999-4.4 C (24.1 F)
2000-3.4 C (25.9 F)
2001-4.6 C (23.7 F)
2002-2.4 C (27.7 F)
2003-3.3 C (26.1 F)
2004-7.6 C (18.3 F)
2006-3.8 C (25.2 F)
2007-3.5 C (25.7 F)
2008-3.4 C (25.9 F)
2009-2.8 C (27.0 F)
2010-3.5 C (25.7 F)
2011-5.6 C (21.9 F)
2012-6.1 C (21.0 F)
2013-3.6 C (25.5 F)
2014-3.4 C (25.9 F)
2015-3.7 C (25.3 F)
2016-7.4 C (18.7 F)
2017-3.9 C (25.0 F)
2018-6.2 C (20.8 F)
2019-2.6 C (27.3 F)
2020-3.1 C (26.4 F)
2021-7.0 C (19.4 F)
2022-3.9 C (25.0 F)
2023-6.4 C (20.5 F)
2024-2.7 C (27.1 F)
2025-5.6 C (21.9 F)
2026-5.5 C (22.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Yamaguchi by year The wettest day of the year at Yamaguchi, 1967 to 2026. The record is 297.0 mm (11.7 in) in 1972, marked on the chart; the median year is 129.0 mm (5.1 in). 0100200300197019801990200020102020Record: 297.0 mm (11.7 in) in 1972
The wettest day of the year at Yamaguchi, 1967 to 2026. The record is 297.0 mm (11.7 in) in 1972, marked on the chart; the median year is 129.0 mm (5.1 in).
Wettest day (Rx1day) at Yamaguchi by year
YearWettest day (Rx1day)
196798.0 mm (3.9 in)
1968104.0 mm (4.1 in)
1969118.0 mm (4.6 in)
1970129.0 mm (5.1 in)
1971141.0 mm (5.6 in)
1972297.0 mm (11.7 in)
1973122.5 mm (4.8 in)
1974128.5 mm (5.1 in)
1975152.0 mm (6.0 in)
197681.5 mm (3.2 in)
1977100.5 mm (4.0 in)
1978129.5 mm (5.1 in)
1979113.5 mm (4.5 in)
1980164.0 mm (6.5 in)
1981181.5 mm (7.1 in)
1982219.5 mm (8.6 in)
1983138.5 mm (5.5 in)
1984121.5 mm (4.8 in)
1985187.0 mm (7.4 in)
1986126.5 mm (5.0 in)
1987112.5 mm (4.4 in)
198884.5 mm (3.3 in)
1989108.5 mm (4.3 in)
19902.0 mm (0.08 in)
199181.0 mm (3.2 in)
1992117.1 mm (4.6 in)
1993166.9 mm (6.6 in)
1994110.0 mm (4.3 in)
1995156.0 mm (6.1 in)
1996117.1 mm (4.6 in)
1997140.0 mm (5.5 in)
1998130.0 mm (5.1 in)
1999112.0 mm (4.4 in)
200096.0 mm (3.8 in)
2001175.0 mm (6.9 in)
2002129.5 mm (5.1 in)
2003105.4 mm (4.1 in)
2004140.5 mm (5.5 in)
2006153.4 mm (6.0 in)
2007111.0 mm (4.4 in)
2008150.9 mm (5.9 in)
2009173.5 mm (6.8 in)
2010181.6 mm (7.1 in)
2011169.9 mm (6.7 in)
201280.0 mm (3.1 in)
2013113.0 mm (4.4 in)
2014126.0 mm (5.0 in)
201598.0 mm (3.9 in)
2016115.1 mm (4.5 in)
2017135.9 mm (5.4 in)
2018173.0 mm (6.8 in)
2019143.0 mm (5.6 in)
2020150.1 mm (5.9 in)
2021206.0 mm (8.1 in)
2022230.1 mm (9.1 in)
202396.0 mm (3.8 in)
2024153.9 mm (6.1 in)
202540.0 mm (1.6 in)
2026263.5 mm (10.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Yamaguchi by year The wettest five days of the year at Yamaguchi, 1967 to 2026. The record is 680.0 mm (26.8 in) in 2026, marked on the chart; the median year is 217.4 mm (8.6 in). 0200400600800197019801990200020102020Record: 680.0 mm (26.8 in) in 2026
The wettest five days of the year at Yamaguchi, 1967 to 2026. The record is 680.0 mm (26.8 in) in 2026, marked on the chart; the median year is 217.4 mm (8.6 in).
Wettest five days (Rx5day) at Yamaguchi by year
YearWettest five days (Rx5day)
1967170.5 mm (6.7 in)
1968188.5 mm (7.4 in)
1969315.5 mm (12.4 in)
1970206.0 mm (8.1 in)
1971232.5 mm (9.2 in)
1972447.5 mm (17.6 in)
1973150.0 mm (5.9 in)
1974256.0 mm (10.1 in)
1975218.0 mm (8.6 in)
1976191.5 mm (7.5 in)
1977212.0 mm (8.3 in)
1978187.0 mm (7.4 in)
1979399.0 mm (15.7 in)
1980209.0 mm (8.2 in)
1981407.5 mm (16.0 in)
1982342.5 mm (13.5 in)
1983243.5 mm (9.6 in)
1984156.0 mm (6.1 in)
1985500.0 mm (19.7 in)
1986237.0 mm (9.3 in)
1987171.0 mm (6.7 in)
1988123.0 mm (4.8 in)
1989204.5 mm (8.1 in)
1990n/a
1991n/a
199283.8 mm (3.3 in)
1993200.1 mm (7.9 in)
1994n/a
1995n/a
1996n/a
1997n/a
199868.6 mm (2.7 in)
1999209.8 mm (8.3 in)
200027.3 mm (1.1 in)
2001118.1 mm (4.6 in)
200285.3 mm (3.4 in)
2003232.1 mm (9.1 in)
2004192.0 mm (7.6 in)
2006362.5 mm (14.3 in)
2007166.3 mm (6.5 in)
2008217.4 mm (8.6 in)
2009433.0 mm (17.0 in)
2010405.7 mm (16.0 in)
2011304.6 mm (12.0 in)
2012167.6 mm (6.6 in)
2013251.9 mm (9.9 in)
2014266.7 mm (10.5 in)
2015118.1 mm (4.6 in)
2016261.6 mm (10.3 in)
2017199.4 mm (7.9 in)
2018329.0 mm (13.0 in)
2019306.1 mm (12.1 in)
2020191.0 mm (7.5 in)
2021404.4 mm (15.9 in)
2022271.5 mm (10.7 in)
2023268.4 mm (10.6 in)
2024297.6 mm (11.7 in)
202537.5 mm (1.5 in)
2026680.0 mm (26.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Yamaguchi by year The longest dry spell of the year at Yamaguchi, 1967 to 2026. The record is 29 days in 1986, marked on the chart; the median year is 16 days. 0102030197019801990200020102020Record: 29 days in 1986
The longest dry spell of the year at Yamaguchi, 1967 to 2026. The record is 29 days in 1986, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Yamaguchi by year
YearLongest dry spell (CDD)
196718 days
196814 days
196918 days
197015 days
197116 days
197216 days
197319 days
197424 days
197514 days
197621 days
197727 days
197816 days
197919 days
198015 days
198116 days
198216 days
198318 days
198424 days
198514 days
198629 days
198713 days
198817 days
198916 days
1990n/a
1991n/a
19921 day
19931 day
19941 day
19951 day
19961 day
19971 day
19982 days
19999 days
2000n/a
2001n/a
20022 days
20038 days
200419 days
200616 days
200715 days
200813 days
200916 days
201013 days
201119 days
201214 days
201320 days
201417 days
201515 days
201616 days
201712 days
201820 days
201917 days
202017 days
202124 days
202216 days
202327 days
202413 days
202514 days
202611 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.

Frost Dates and Growing Season

24 years with a frost

Across 24 years with a frost, the median last spring frost at Yamaguchi falls on 30 March and the median first autumn frost on 30 November, which leaves a median of 242 days between them.

Frost dates and growing season at Yamaguchi
MeasureMedian, all yearsEarliest periodRecent period (1967 to 2025)Recent against earliestFitted trend
Last spring frost30 Marchn/a30 Marchn/an/a
First autumn frost30 Novembern/a30 Novembern/an/a
Growing days242 daysn/a242 daysn/an/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

40 years, 1967 to 2022

A day with at least 132.0 mm (5.2 in) of rain is expected about once in 2 years. A day with at least 298.8 mm (11.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Yamaguchi: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years132.0 mm (5.2 in)
5 years170.5 mm (6.7 in)
10 years198.3 mm (7.8 in)
25 years236.2 mm (9.3 in)
50 years266.6 mm (10.5 in)Longer than the 40 years of record
100 years298.8 mm (11.8 in)Longer than the 40 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, 40 years of values from 1967 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: 297.0 mm (11.7 in) in 1972; 230.1 mm (9.1 in) in 2022; 219.5 mm (8.6 in) in 1982.

Download the Data

  • Data for Yamaguchi standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Yamaguchi 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 (2026-10-14).