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Sasebo Reg Met HQ Weather Records (JA000047812)

Record envelope, standing records and threshold days for Sasebo Reg Met HQ (JA000047812), Japan, with 76 years of record.

Key Facts for Sasebo Reg Met HQ

  • Sasebo Reg Met HQ (JA000047812) is a weather station in Japan at 33.17 latitude and 129.72 longitude, 17 m (56 ft) above sea level.
  • The station reports from 1951 to 2026, 76 years of record.
  • 1,464 records set at Sasebo Reg Met HQ still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Sasebo Reg Met HQ set a daily record high minimum temperature of 22.1 C (71.8 F) on 10 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, 33.17 latitude, 129.72 longitude.
  • Elevation: 17 m (56 ft).
  • Period of record: 1951 to 2026, 76 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

27 days at or beyond a record
Daily record high and record low at Sasebo Reg Met HQ, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sasebo Reg Met HQ. The lines show the 2026 daily maximum and minimum. 27 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 Sasebo Reg Met HQ. The lines show the 2026 daily maximum and minimum. 27 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Sasebo Reg Met HQ, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan19.4 C (66.9 F)-4.9 C (23.2 F)18.6 C (65.5 F)-0.9 C (30.4 F)
Feb21.4 C (70.5 F)-6.1 C (21.0 F)21.1 C (70.0 F)-1.1 C (30.0 F)
Mar24.4 C (75.9 F)-3.9 C (25.0 F)21.2 C (70.2 F)2.1 C (35.8 F)
Apr27.4 C (81.3 F)-0.4 C (31.3 F)23.9 C (75.0 F)5.8 C (42.4 F)
May31.7 C (89.1 F)5.7 C (42.3 F)30.9 C (87.6 F)11.6 C (52.9 F)
Jun32.8 C (91.0 F)11.6 C (52.9 F)30.4 C (86.7 F)17.1 C (62.8 F)
Jul36.8 C (98.2 F)14.2 C (57.6 F)35.4 C (95.7 F)21.4 C (70.5 F)
Aug39.1 C (102.4 F)17.1 C (62.8 F)39.1 C (102.4 F)25.4 C (77.7 F)
Sep35.2 C (95.4 F)10.0 C (50.0 F)35.0 C (95.0 F)20.4 C (68.7 F)
Oct32.4 C (90.3 F)4.8 C (40.6 F)28.6 C (83.5 F)17.6 C (63.7 F)
Nov26.7 C (80.1 F)0.4 C (32.7 F)n/an/a
Dec23.7 C (74.7 F)-3.3 C (26.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sasebo Reg Met HQ by the year they were set 1,464 records at Sasebo Reg Met HQ still stand. 2025 holds the most, with 97. 02550751001952: 401953: 341954: 471955: 271956: 371957: 381958: 441959: 381960: 501961: 531962: 281963: 361964: 471965: 401966: 391967: 311968: 331969: 461970: 371971: 241972: 351973: 321974: 351975: 201976: 491977: 401978: 201979: 281980: 391981: 471982: 331983: 201984: 221985: 171986: 201987: 281988: 211989: 292025: 972026: 631952195619601964196819721976198019841988
1,464 records at Sasebo Reg Met HQ still stand. 2025 holds the most, with 97.
Standing records at Sasebo Reg Met HQ by the year they were set
Year setStanding records
195240
195334
195447
195527
195637
195738
195844
195938
196050
196153
196228
196336
196447
196540
196639
196731
196833
196946
197037
197124
197235
197332
197435
197520
197649
197740
197820
197928
198039
198147
198233
198320
198422
198517
198620
198728
198821
198929
202597
202663

All-Time Record Progression

4 new records
When Sasebo Reg Met HQ set new all-time records 4 all-time records were set at Sasebo Reg Met HQ between 24 July 2025 and 6 August 2026. Each dot is a new record. Record high minimum temperatureRecord high maximum temperature24 July 2025: Record high minimum temperature 28.6 C (83.5 F)3 August 2026: Record high maximum temperature 39.1 C (102.4 F)3 August 2026: Record high minimum temperature 29.9 C (85.8 F)6 August 2026: Record high minimum temperature 31.4 C (88.5 F)2025
4 all-time records were set at Sasebo Reg Met HQ between 24 July 2025 and 6 August 2026. Each dot is a new record.
When Sasebo Reg Met HQ set new all-time records
DateKindDetail
2025-07-24Record high minimum temperatureRecord high minimum temperature 28.6 C (83.5 F)
2026-08-03Record high maximum temperatureRecord high maximum temperature 39.1 C (102.4 F)
2026-08-03Record high minimum temperatureRecord high minimum temperature 29.9 C (85.8 F)
2026-08-06Record high minimum temperatureRecord high minimum temperature 31.4 C (88.5 F)

Wettest Day of Each Month

Jul: 371.8 mm (14.6 in)
Record daily precipitation for each month at Sasebo Reg Met HQ The wettest day on record for each calendar month at Sasebo Reg Met HQ. The most was 371.8 mm (14.6 in) on 25 July 1957. 0100200300400 Jan: 72.9 mm (2.9 in), 28 January 1967 Jan Feb: 113.0 mm (4.4 in), 16 February 1989 Feb Mar: 87.4 mm (3.4 in), 25 March 1958 Mar Apr: 344.4 mm (13.6 in), 15 April 1955 Apr May: 99.5 mm (3.9 in), 18 May 1974 May Jun: 251.3 mm (9.9 in), 25 June 1953 Jun Jul: 371.8 mm (14.6 in), 25 July 1957 Jul Aug: 265.0 mm (10.4 in), 12 August 2026 Aug Sep: 156.3 mm (6.2 in), 25 September 1954 Sep Oct: 90.0 mm (3.5 in), 12 October 1985 Oct Nov: 152.6 mm (6.0 in), 13 November 1966 Nov Dec: 75.0 mm (3.0 in), 7 December 1969 Dec
The wettest day on record for each calendar month at Sasebo Reg Met HQ. The most was 371.8 mm (14.6 in) on 25 July 1957.
Record daily precipitation for each month at Sasebo Reg Met HQ
MonthRecord daily precipitation (mm)Date
Jan72.9 mm (2.9 in)28 January 1967
Feb113.0 mm (4.4 in)16 February 1989
Mar87.4 mm (3.4 in)25 March 1958
Apr344.4 mm (13.6 in)15 April 1955
May99.5 mm (3.9 in)18 May 1974
Jun251.3 mm (9.9 in)25 June 1953
Jul371.8 mm (14.6 in)25 July 1957
Aug265.0 mm (10.4 in)12 August 2026
Sep156.3 mm (6.2 in)25 September 1954
Oct90.0 mm (3.5 in)12 October 1985
Nov152.6 mm (6.0 in)13 November 1966
Dec75.0 mm (3.0 in)7 December 1969

Period of Record Coverage

1952 to 2026
Days with data per year at Sasebo Reg Met HQ 40 years of record at Sasebo Reg Met HQ, 1952 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026. 1952: 366 of 366 days1953: 363 of 365 days1954: 360 of 365 days1955: 362 of 365 days1956: 362 of 366 days1957: 360 of 365 days1958: 360 of 365 days1959: 360 of 365 days1960: 361 of 366 days1961: 361 of 365 days1962: 363 of 365 days1963: 362 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: 364 of 365 days1975: 364 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: 364 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 days2025: 354 of 365 days2026: 275 of 365 days19551960196519701975198019852025
40 years of record at Sasebo Reg Met HQ, 1952 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026.
Days with data per year at Sasebo Reg Met HQ
YearDays with dataShare of yearComplete
1952366100%Yes
195336399%Yes
195436099%Yes
195536299%Yes
195636299%Yes
195736099%Yes
195836099%Yes
195936099%Yes
196036199%Yes
196136199%Yes
196236399%Yes
196336299%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974364100%Yes
1975364100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982364100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
202535497%Yes
202627575%No

Latest Records

20
Latest records at Sasebo Reg Met HQ
DateStationRecordValueBeat old record byOld record stoodSignificance
10 October 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)22.1 C (71.8 F)1.6 C (2.9 F)0 years11 of 100 (Routine)
9 October 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)22.4 C (72.3 F)0.6 C (1.1 F)56 years24 of 100 (Routine)
1 October 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)22.6 C (72.7 F)0.1 C (0.2 F)65 years26 of 100 (Routine)
29 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)103.0 mm (4.1 in)19.1 mm (0.8 in)71 years35 of 100 (Notable)
27 September 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)23.9 C (75.0 F)0.2 C (0.4 F)65 years26 of 100 (Routine)
26 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)117.0 mm (4.6 in)89.5 mm (3.5 in)64 years59 of 100 (Notable)
20 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)326.0 mm (12.8 in)229.0 mm (9.0 in)40 years59 of 100 (Notable)
16 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)288.0 mm (11.3 in)229.0 mm (9.0 in)67 years67 of 100 (Major)
11 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)314.5 mm (12.4 in)206.4 mm (8.1 in)73 years69 of 100 (Major)
10 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)81.5 mm (3.2 in)18.5 mm (0.7 in)68 years33 of 100 (Routine)
9 September 2026Sasebo Reg Met HQ, JPdaily rain (Provisional)211.0 mm (8.3 in)130.0 mm (5.1 in)61 years65 of 100 (Major)
8 September 2026Sasebo Reg Met HQ, JPall-time rain (Provisional)424.0 mm (16.7 in)52.2 mm (2.1 in)69 years66 of 100 (Major)
6 September 2026Sasebo Reg Met HQ, JPmonthly rain (Provisional)354.5 mm (14.0 in)198.2 mm (7.8 in)71 years78 of 100 (Major)
2 September 2026Sasebo Reg Met HQ, JPdaily high max (Provisional)35.0 C (95.0 F)1.4 C (2.5 F)64 years31 of 100 (Routine)
2 September 2026Sasebo Reg Met HQ, JPmonthly high min (Tie, Provisional)28.1 C (82.6 F)tie56 years8 of 100 (Routine)
1 September 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)27.6 C (81.7 F)0.3 C (0.5 F)67 years27 of 100 (Routine)
1 September 2026Sasebo Reg Met HQ, JPdaily high max (Provisional)34.0 C (93.2 F)0.3 C (0.5 F)59 years25 of 100 (Routine)
31 August 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)26.6 C (79.9 F)0.2 C (0.4 F)44 years21 of 100 (Routine)
29 August 2026Sasebo Reg Met HQ, JPdaily high min (Provisional)28.1 C (82.6 F)0.8 C (1.4 F)0 years11 of 100 (Routine)
28 August 2026Sasebo Reg Met HQ, JPdaily high max (Provisional)34.1 C (93.4 F)0.1 C (0.2 F)55 years23 of 100 (Routine)

Climate Trend

39 complete years, 1952 to 2025
Annual mean temperature at Sasebo Reg Met HQ as warming stripes, 1952 to 2025 One stripe for each of 39 complete years at Sasebo Reg Met HQ, 1952 to 2025. Blue stripes are years cooler than the station's own mean of 16.5 C (61.8 F); red stripes are warmer. The coolest year was 1965, at 15.6 C (60.2 F), and the warmest was 2025, at 18.4 C (65.0 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1952: 16.4 C, -0.2 C from the station mean1953: 16.7 C, +0.2 C from the station mean1954: 17.0 C, +0.4 C from the station mean1955: 16.9 C, +0.4 C from the station mean1956: 16.0 C, -0.5 C from the station mean1957: 16.0 C, -0.5 C from the station mean1958: 17.0 C, +0.4 C from the station mean1959: 17.3 C, +0.8 C from the station mean1960: 17.0 C, +0.5 C from the station mean1961: 17.3 C, +0.8 C from the station mean1962: 16.2 C, -0.3 C from the station mean1963: 16.1 C, -0.4 C from the station mean1964: 17.1 C, +0.6 C from the station mean1965: 15.6 C, -0.9 C from the station mean1966: 16.4 C, -0.1 C from the station mean1967: 16.4 C, -0.1 C from the station mean1968: 16.0 C, -0.6 C from the station mean1969: 16.1 C, -0.4 C from the station mean1970: 16.1 C, -0.4 C from the station mean1971: 16.4 C, -0.1 C from the station mean1972: 16.5 C, 0.0 C from the station mean1973: 16.6 C, 0.0 C from the station mean1974: 16.0 C, -0.5 C from the station mean1975: 16.8 C, +0.2 C from the station mean1976: 15.9 C, -0.7 C from the station mean1977: 16.6 C, +0.1 C from the station mean1978: 17.0 C, +0.4 C from the station mean1979: 16.8 C, +0.3 C from the station mean1980: 15.8 C, -0.7 C from the station mean1981: 15.9 C, -0.7 C from the station mean1982: 16.4 C, -0.2 C from the station mean1983: 16.6 C, 0.0 C from the station mean1984: 16.4 C, -0.2 C from the station mean1985: 16.8 C, +0.2 C from the station mean1986: 16.2 C, -0.4 C from the station mean1987: 16.8 C, +0.3 C from the station mean1988: 16.6 C, +0.1 C from the station mean1989: 17.1 C, +0.6 C from the station mean2025: 18.4 C, +1.8 C from the station mean19521960197019801990200020102020
One stripe for each of 39 complete years at Sasebo Reg Met HQ, 1952 to 2025. Blue stripes are years cooler than the station's own mean of 16.5 C (61.8 F); red stripes are warmer. The coolest year was 1965, at 15.6 C (60.2 F), and the warmest was 2025, at 18.4 C (65.0 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Sasebo Reg Met HQ as warming stripes, 1952 to 2025
YearAnnual mean temperatureDifference from the station mean
195216.4 C-0.17 C
195316.7 C+0.15 C
195417.0 C+0.44 C
195516.9 C+0.39 C
195616.0 C-0.50 C
195716.0 C-0.50 C
195817.0 C+0.42 C
195917.3 C+0.76 C
196017.0 C+0.50 C
196117.3 C+0.75 C
196216.2 C-0.34 C
196316.1 C-0.42 C
196417.1 C+0.60 C
196515.6 C-0.90 C
196616.4 C-0.14 C
196716.4 C-0.14 C
196816.0 C-0.57 C
196916.1 C-0.42 C
197016.1 C-0.44 C
197116.4 C-0.14 C
197216.5 C-0.05 C
197316.6 C+0.03 C
197416.0 C-0.55 C
197516.8 C+0.23 C
197615.9 C-0.68 C
197716.6 C+0.07 C
197817.0 C+0.41 C
197916.8 C+0.30 C
198015.8 C-0.73 C
198115.9 C-0.68 C
198216.4 C-0.18 C
198316.6 C+0.02 C
198416.4 C-0.17 C
198516.8 C+0.23 C
198616.2 C-0.37 C
198716.8 C+0.27 C
198816.6 C+0.06 C
198917.1 C+0.56 C
202518.4 C+1.82 C

The fitted trend in annual mean temperature here over 1952 to 2025 is 0.11 C (-0.01 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.20 F (-0.02 to 0.41) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Sasebo Reg Met HQ
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.11 C (-0.01 to 0.23) per decade0.20 F (-0.02 to 0.41) per decade1952 to 202539Not clearly different from zero
Mean daily maximum0.04 C (-0.08 to 0.16) per decade0.1 F (-0.1 to 0.3) per decade1952 to 202539Not clearly different from zero
Mean daily minimum0.2 C (0.1 to 0.3) per decade0.3 F (0.1 to 0.6) per decade1952 to 202539Rise

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 Sasebo Reg Met HQ: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.1 C (102.4 F)202635.3 C (95.5 F)40
Coldest night (TNn)-6.1 C (21.0 F)1977-3.0 C (26.5 F)40
Wettest day (Rx1day)424.0 mm (16.7 in)2026149.0 mm (5.9 in)41
Wettest five days (Rx5day)1,032.0 mm (40.6 in)2026262.6 mm (10.3 in)41
Longest dry spell (CDD)34 days198417 days41

Hottest day (TXx)

Hottest day (TXx) at Sasebo Reg Met HQ by year The hottest day of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 39.1 C (102.4 F) in 2026, marked on the chart; the median year is 35.3 C (95.5 F). 32343638401960198020002020Record: 39.1 C (102.4 F) in 2026
The hottest day of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 39.1 C (102.4 F) in 2026, marked on the chart; the median year is 35.3 C (95.5 F).
Hottest day (TXx) at Sasebo Reg Met HQ by year
YearHottest day (TXx)
1951n/a
195235.1 C (95.2 F)
195336.1 C (97.0 F)
195435.4 C (95.7 F)
195534.3 C (93.7 F)
195636.3 C (97.3 F)
195733.9 C (93.0 F)
195835.2 C (95.4 F)
195936.2 C (97.2 F)
196036.8 C (98.2 F)
196135.9 C (96.6 F)
196234.8 C (94.6 F)
196334.6 C (94.3 F)
196436.4 C (97.5 F)
196535.4 C (95.7 F)
196636.6 C (97.9 F)
196735.5 C (95.9 F)
196834.6 C (94.3 F)
196933.7 C (92.7 F)
197035.3 C (95.5 F)
197135.4 C (95.7 F)
197234.8 C (94.6 F)
197335.8 C (96.4 F)
197435.2 C (95.4 F)
197535.6 C (96.1 F)
197633.5 C (92.3 F)
197733.8 C (92.8 F)
197835.8 C (96.4 F)
197935.5 C (95.9 F)
198032.4 C (90.3 F)
198134.4 C (93.9 F)
198234.2 C (93.6 F)
198335.3 C (95.5 F)
198436.5 C (97.7 F)
198535.8 C (96.4 F)
198635.3 C (95.5 F)
198734.0 C (93.2 F)
198834.5 C (94.1 F)
198934.6 C (94.3 F)
202536.3 C (97.3 F)
202639.1 C (102.4 F)

Coldest night (TNn)

Coldest night (TNn) at Sasebo Reg Met HQ by year The coldest night of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is -6.1 C (21.0 F) in 1977, marked on the chart; the median year is -3.0 C (26.5 F). -8-6-4-201960198020002020Record: -6.1 C (21.0 F) in 1977
The coldest night of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is -6.1 C (21.0 F) in 1977, marked on the chart; the median year is -3.0 C (26.5 F).
Coldest night (TNn) at Sasebo Reg Met HQ by year
YearColdest night (TNn)
1951n/a
1952-2.5 C (27.5 F)
1953-3.3 C (26.1 F)
1954-1.4 C (29.5 F)
1955-2.8 C (27.0 F)
1956-3.2 C (26.2 F)
1957-3.0 C (26.6 F)
1958-2.0 C (28.4 F)
1959-3.6 C (25.5 F)
1960-3.1 C (26.4 F)
1961-3.3 C (26.1 F)
1962-2.5 C (27.5 F)
1963-3.9 C (25.0 F)
1964-2.3 C (27.9 F)
1965-4.0 C (24.8 F)
1966-3.7 C (25.3 F)
1967-4.9 C (23.2 F)
1968-3.4 C (25.9 F)
1969-1.9 C (28.6 F)
1970-4.3 C (24.3 F)
1971-3.4 C (25.9 F)
1972-0.4 C (31.3 F)
1973-3.3 C (26.1 F)
1974-3.6 C (25.5 F)
1975-3.5 C (25.7 F)
1976-4.9 C (23.2 F)
1977-6.1 C (21.0 F)
1978-2.0 C (28.4 F)
1979-1.5 C (29.3 F)
1980-3.0 C (26.6 F)
1981-4.9 C (23.2 F)
1982-2.4 C (27.7 F)
1983-4.0 C (24.8 F)
1984-3.6 C (25.5 F)
1985-2.7 C (27.1 F)
1986-2.8 C (27.0 F)
1987-2.1 C (28.2 F)
1988-1.7 C (28.9 F)
1989-0.8 C (30.6 F)
2025-1.1 C (30.0 F)
2026-1.1 C (30.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sasebo Reg Met HQ by year The wettest day of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 424.0 mm (16.7 in) in 2026, marked on the chart; the median year is 149.0 mm (5.9 in). 01002003004005001960198020002020Record: 424.0 mm (16.7 in) in 2026
The wettest day of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 424.0 mm (16.7 in) in 2026, marked on the chart; the median year is 149.0 mm (5.9 in).
Wettest day (Rx1day) at Sasebo Reg Met HQ by year
YearWettest day (Rx1day)
1951124.6 mm (4.9 in)
1952151.5 mm (6.0 in)
1953251.3 mm (9.9 in)
1954156.3 mm (6.2 in)
1955344.4 mm (13.6 in)
1956205.2 mm (8.1 in)
1957371.8 mm (14.6 in)
195891.0 mm (3.6 in)
195975.5 mm (3.0 in)
1960144.8 mm (5.7 in)
196183.7 mm (3.3 in)
1962169.8 mm (6.7 in)
196396.4 mm (3.8 in)
1964136.0 mm (5.4 in)
1965164.9 mm (6.5 in)
1966152.6 mm (6.0 in)
1967232.5 mm (9.2 in)
1968107.0 mm (4.2 in)
1969111.0 mm (4.4 in)
1970110.5 mm (4.4 in)
197186.5 mm (3.4 in)
1972154.0 mm (6.1 in)
1973149.0 mm (5.9 in)
197499.5 mm (3.9 in)
197596.5 mm (3.8 in)
197694.0 mm (3.7 in)
1977116.5 mm (4.6 in)
1978233.5 mm (9.2 in)
1979150.5 mm (5.9 in)
1980225.0 mm (8.9 in)
1981155.5 mm (6.1 in)
1982200.5 mm (7.9 in)
1983139.0 mm (5.5 in)
1984114.5 mm (4.5 in)
1985192.5 mm (7.6 in)
1986225.0 mm (8.9 in)
1987146.0 mm (5.7 in)
198899.0 mm (3.9 in)
1989301.5 mm (11.9 in)
202554.5 mm (2.1 in)
2026424.0 mm (16.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sasebo Reg Met HQ by year The wettest five days of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 1,032.0 mm (40.6 in) in 2026, marked on the chart; the median year is 262.6 mm (10.3 in). 05001,0001,5001960198020002020Record: 1,032.0 mm (40.6 in) in 2026
The wettest five days of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 1,032.0 mm (40.6 in) in 2026, marked on the chart; the median year is 262.6 mm (10.3 in).
Wettest five days (Rx5day) at Sasebo Reg Met HQ by year
YearWettest five days (Rx5day)
1951220.5 mm (8.7 in)
1952338.6 mm (13.3 in)
1953560.9 mm (22.1 in)
1954227.5 mm (9.0 in)
1955439.6 mm (17.3 in)
1956340.9 mm (13.4 in)
1957464.2 mm (18.3 in)
1958275.6 mm (10.9 in)
1959122.7 mm (4.8 in)
1960249.5 mm (9.8 in)
1961184.4 mm (7.3 in)
1962436.4 mm (17.2 in)
1963262.6 mm (10.3 in)
1964238.1 mm (9.4 in)
1965343.0 mm (13.5 in)
1966179.2 mm (7.1 in)
1967389.0 mm (15.3 in)
1968254.0 mm (10.0 in)
1969210.5 mm (8.3 in)
1970147.0 mm (5.8 in)
1971131.5 mm (5.2 in)
1972351.0 mm (13.8 in)
1973217.5 mm (8.6 in)
1974164.5 mm (6.5 in)
1975216.5 mm (8.5 in)
1976140.5 mm (5.5 in)
1977136.0 mm (5.4 in)
1978291.5 mm (11.5 in)
1979389.0 mm (15.3 in)
1980351.5 mm (13.8 in)
1981327.0 mm (12.9 in)
1982311.5 mm (12.3 in)
1983212.0 mm (8.3 in)
1984157.0 mm (6.2 in)
1985480.0 mm (18.9 in)
1986318.5 mm (12.5 in)
1987382.5 mm (15.1 in)
1988218.0 mm (8.6 in)
1989301.5 mm (11.9 in)
202521.5 mm (0.8 in)
20261,032.0 mm (40.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sasebo Reg Met HQ by year The longest dry spell of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 34 days in 1984, marked on the chart; the median year is 17 days. 0102030401960198020002020Record: 34 days in 1984
The longest dry spell of the year at Sasebo Reg Met HQ, 1951 to 2026. The record is 34 days in 1984, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Sasebo Reg Met HQ by year
YearLongest dry spell (CDD)
195118 days
195214 days
195315 days
195431 days
195521 days
195622 days
195714 days
195814 days
195916 days
196017 days
196114 days
196219 days
196314 days
196415 days
196512 days
196615 days
196726 days
196816 days
196922 days
197019 days
197124 days
197215 days
197316 days
197423 days
197515 days
197621 days
197726 days
197817 days
197923 days
198016 days
198114 days
198218 days
198314 days
198434 days
198519 days
198623 days
198719 days
198829 days
198925 days
20259 days
20267 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 Sasebo Reg Met HQ falls on 5 March and the median first autumn frost on 20 December, which leaves a median of 290 days between them.

Frost dates and growing season at Sasebo Reg Met HQ
MeasureMedian, all yearsEarliest periodRecent period (1952 to 1988)Recent against earliestFitted trend
Last spring frost5 Marchn/a5 Marchn/an/a
First autumn frost20 Decembern/a20 Decembern/an/a
Growing days290 daysn/a290 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

39 years, 1951 to 1989

A day with at least 142.7 mm (5.6 in) of rain is expected about once in 2 years. A day with at least 437.5 mm (17.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Sasebo Reg Met HQ: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years142.7 mm (5.6 in)
5 years203.0 mm (8.0 in)
10 years249.5 mm (9.8 in)
25 years316.9 mm (12.5 in)
50 years374.0 mm (14.7 in)Longer than the 39 years of record
100 years437.5 mm (17.2 in)Longer than the 39 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, 39 years of values from 1951 to 1989.

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: 371.8 mm (14.6 in) in 1957; 344.4 mm (13.6 in) in 1955; 301.5 mm (11.9 in) in 1989.

Download the Data

  • Data for Sasebo Reg Met HQ standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Sasebo Reg Met HQ 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).