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Built 2026-10-19 (19 October 2026)

Extreme rain in Japan, 6 to 17 August 2026

Extreme rain in Japan, 6 to 17 August 2026: 139 records at 68 stations, peak on 12 August 2026. Closed.

Data as of . Last revised (2026-10-17).

Key Facts

  • Extreme rain in Japan, 6 to 17 August 2026 set or tied 139 station records at 68 stations.
  • It ran from 6 August 2026 to 17 August 2026 (12 days) and its peak day was 12 August 2026.
  • Status: closed.
  • Hamamatsu set an all-time record daily precipitation of 363.0 mm (14.3 in) on 7 August 2026.
  • The busiest day was 12 August 2026 with 28 records.
  • The oldest broken record in the ranked list had stood for 69 years.

Footprint

6 to 17 August 2026
Footprint of Extreme rain in Japan, 6 to 17 August 2026 The area covered by Extreme rain in Japan, 6 to 17 August 2026 is outlined, with 16 of the stations that set records marked, coloured by record type.
The area covered by Extreme rain in Japan, 6 to 17 August 2026 is outlined, with 16 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Extreme rain in Japan, 6 to 17 August 2026: stations that set records in the event
StationTypeValueDate
MishimaRecord daily precipitation413.0 mm (16.3 in)2026-08-07
HamamatsuRecord daily precipitation363.0 mm (14.3 in)2026-08-07
MombetsuRecord daily precipitation223.0 mm (8.8 in)2026-08-08
YokkaichiRecord daily precipitation435.0 mm (17.1 in)2026-08-07
TadotsuRecord daily precipitation342.0 mm (13.5 in)2026-08-07
HakodateRecord daily precipitation235.0 mm (9.3 in)2026-08-07
NagasakiRecord daily precipitation519.5 mm (20.5 in)2026-08-11
AbashiriRecord daily precipitation216.0 mm (8.5 in)2026-08-07
KochiRecord daily precipitation647.0 mm (25.5 in)2026-08-13
ObihiroRecord daily precipitation232.5 mm (9.2 in)2026-08-12
NaraRecord daily precipitation251.5 mm (9.9 in)2026-08-08
AkitaRecord daily precipitation194.0 mm (7.6 in)2026-08-06
MatsuyamaRecord daily precipitation230.0 mm (9.1 in)2026-08-08
KofuRecord daily precipitation456.5 mm (18.0 in)2026-08-13
SuttsuRecord daily precipitation330.5 mm (13.0 in)2026-08-08
KutchanRecord daily precipitation423.0 mm (16.7 in)2026-08-08
FukuyamaRecord daily precipitation216.5 mm (8.5 in)2026-08-15
OnahamaRecord daily precipitation269.5 mm (10.6 in)2026-08-06
NiigataRecord daily precipitation122.5 mm (4.8 in)2026-08-11
TomakomaiRecord daily precipitation145.5 mm (5.7 in)2026-08-07
MitoRecord daily precipitation218.0 mm (8.6 in)2026-08-16
HamadaRecord daily precipitation152.0 mm (6.0 in)2026-08-11
EsashiRecord daily precipitation120.0 mm (4.7 in)2026-08-13
IrakoRecord daily precipitation215.5 mm (8.5 in)2026-08-16
OtaruRecord daily precipitation125.5 mm (4.9 in)2026-08-12
WakamatsuRecord daily precipitation270.0 mm (10.6 in)2026-08-17
TajimaRecord daily precipitation68.0 mm (2.7 in)2026-08-11
SuwaRecord daily precipitation94.5 mm (3.7 in)2026-08-11
GifuRecord daily precipitation108.5 mm (4.3 in)2026-08-07
TanegashimaRecord daily precipitation285.5 mm (11.2 in)2026-08-12
WakkanaiRecord daily precipitation135.5 mm (5.3 in)2026-08-12
MoriokaRecord daily precipitation151.0 mm (5.9 in)2026-08-16
Kure Reg Met HQRecord daily precipitation297.5 mm (11.7 in)2026-08-08
HitaRecord daily precipitation263.5 mm (10.4 in)2026-08-13
OsakaRecord daily precipitation197.5 mm (7.8 in)2026-08-08
Sasebo Reg Met HQRecord daily precipitation265.0 mm (10.4 in)2026-08-12
TakamatsuRecord daily precipitation47.0 mm (1.9 in)2026-08-12
Fukushima ArptRecord daily precipitation69.0 mm (2.7 in)2026-08-16
NikkoRecord daily precipitation150.0 mm (5.9 in)2026-08-13
RumoiRecord daily precipitation154.0 mm (6.1 in)2026-08-08
AikawaRecord daily precipitation73.5 mm (2.9 in)2026-08-12
SakaiRecord daily precipitation76.0 mm (3.0 in)2026-08-12
ShionomisakiRecord daily precipitation168.5 mm (6.6 in)2026-08-12
YonagoRecord daily precipitation61.5 mm (2.4 in)2026-08-16
ShizuokaRecord daily precipitation232.0 mm (9.1 in)2026-08-07
MaebashiRecord daily precipitation137.5 mm (5.4 in)2026-08-12
MiyakonojoRecord daily precipitation92.0 mm (3.6 in)2026-08-11
OmuRecord daily precipitation88.5 mm (3.5 in)2026-08-12
Maizuru Reg Met HQRecord daily precipitation199.0 mm (7.8 in)2026-08-12
HitoyoshiRecord daily precipitation205.5 mm (8.1 in)2026-08-12
SumotoRecord daily precipitation70.0 mm (2.8 in)2026-08-13
FukauraRecord daily precipitation314.5 mm (12.4 in)2026-08-12
FukuiRecord daily precipitation72.0 mm (2.8 in)2026-08-07
OshimaRecord daily precipitation98.5 mm (3.9 in)2026-08-12
TokushimaRecord daily precipitation122.5 mm (4.8 in)2026-08-13
KaruizawaRecord daily precipitation91.5 mm (3.6 in)2026-08-15
TakayamaRecord daily precipitation112.5 mm (4.4 in)2026-08-15
KitamiesashiRecord daily precipitation40.5 mm (1.6 in)2026-08-13
UenoRecord daily precipitation86.5 mm (3.4 in)2026-08-11
ChichibuRecord daily precipitation55.5 mm (2.2 in)2026-08-11

Records per Day

Peak day 28
Records per day during Extreme rain in Japan, 6 to 17 August 2026 Records set or tied each day from 6 August 2026 to 17 August 2026. The most in one day was 28 on 12 August 2026. 0 8 15 23 30 08-0608-0808-1008-1208-1408-16
Records set or tied each day from 6 August 2026 to 17 August 2026. The most in one day was 28 on 12 August 2026.
Records per day during Extreme rain in Japan, 6 to 17 August 2026
DateRecords
2026-08-0610
2026-08-0718
2026-08-0818
2026-08-095
2026-08-103
2026-08-1121
2026-08-1228
2026-08-1314
2026-08-146
2026-08-158
2026-08-164
2026-08-174

Top Records by Margin

Margin over the record replaced
Top records of Extreme rain in Japan, 6 to 17 August 2026 ranked by margin
Kochi, 08-13352.5 mm (13.9 in)
Tadotsu, 08-08293.2 mm (11.5 in)
Nagasaki, 08-11267.5 mm (10.5 in)
Kutchan, 08-08206.0 mm (8.1 in)
Kofu, 08-13171.0 mm (6.7 in)
Matsuyama, 08-08170.7 mm (6.7 in)
Yokkaichi, 08-07164.0 mm (6.5 in)
Tadotsu, 08-07143.5 mm (5.6 in)
Mishima, 08-07142.0 mm (5.6 in)
Hamamatsu, 08-07137.0 mm (5.4 in)
Hakodate, 08-08123.0 mm (4.8 in)
Akita, 08-08123.0 mm (4.8 in)
Tadotsu, 08-11110.1 mm (4.3 in)
Suttsu, 08-0899.5 mm (3.9 in)
Hakodate, 08-0798.8 mm (3.9 in)

Margin is how far the new value is beyond the record it replaced. Ties are not shown.

Margin Against Age of the Broken Record

Margin against age of the broken record in Extreme rain in Japan, 6 to 17 August 2026 139 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right. 0 20 40 60 80 0100200300400 Margin (mm) Years the old record stood
139 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right.
Margin against age of the broken record in Extreme rain in Japan, 6 to 17 August 2026
Margin (mm)Years the old record stood
13754
14256
7552
16452
14442
9967
12335
26869
6631
35350
8745
6966
6768
1000
2060
1230
1710
17167
29367
11065
6650
688
4260
9867
7565
10251
12747
17448
9665
12149
6968
11912
6844
16743
18337
7268
22233
1290
4963
4965
5356
614
17323
8016
7116
7713
6068
9523
5843
5932
7612
9712
1039
6867
3367
777
620
654
499
6331
3248
2767
290
1444
4755
2933
1531
2745
3651
893
6627
974
752
4224
4724
2063
2965
2436
1767
454
3037
5637
1261
1944
3212
1368
150
7513
4437
332
1965
684
314
3033
2053
1751
2043
1167
3913
3837
3413
568
456
2527
2239
534
263
2712
2137
647
1536
3323
4613
2612
298
844
1235
2416
1127
836
337
64
237
532
1316
1128
204
133
10
324
325
512
812
78
144
212
44
311
24

Compared With Other Events

Station records per event
Station records in Extreme rain in Japan, 6 to 17 August 2026 compared with similar events
Extreme rain in United States and Mexico, 23 February to 15 March 20192,223 records
Extreme rain in United States, 3 to 19 January 20242,133 records
Extreme rain in Australia, 7 to 26 March 20212,099 records
Extreme rain in United States and Mexico, 29 September to 19 October 20181,970 records
Extreme rain in United States, 19 December 2022 to 13 January 20231,941 records
Extreme rain in Japan, 6 to 17 August 2026 (this event)139 records

Every Record Set

138 of 139
Every record set or tied during Extreme rain in Japan, 6 to 17 August 2026, in date order
DateStationRecordValueMarginYears stoodSignificance
2026-08-06AkitaRecord daily precipitation194.0 mm (7.6 in)66.8 mm (2.6 in)6869 of 100 (Major)
2026-08-06OnahamaRecord daily precipitation269.5 mm (10.6 in)42.3 mm (1.7 in)6063 of 100 (Major)
2026-08-06GifuRecord daily precipitation113.0 mm (4.4 in)36.0 mm (1.4 in)5136 of 100 (Notable)
2026-08-06MishimaRecord daily precipitation151.5 mm (6.0 in)66.4 mm (2.6 in)2736 of 100 (Notable)
2026-08-06WakamatsuRecord daily precipitation74.5 mm (2.9 in)24.0 mm (0.9 in)3634 of 100 (Routine)
2026-08-06OsakaRecord daily precipitation27.5 mm (1.1 in)6.4 mm (0.25 in)4724 of 100 (Routine)
2026-08-06HamamatsuRecord daily precipitation86.0 mm (3.4 in)12.1 mm (0.5 in)3521 of 100 (Routine)
2026-08-06TakayamaRecord daily precipitation70.0 mm (2.8 in)5.0 mm (0.20 in)3218 of 100 (Routine)
2026-08-06MatsuyamaRecord daily precipitation53.0 mm (2.1 in)7.5 mm (0.30 in)1213 of 100 (Routine)
2026-08-06YokkaichiRecord daily precipitation63.0 mm (2.5 in)14.0 mm (0.6 in)412 of 100 (Routine)
2026-08-07HamamatsuRecord daily precipitation363.0 mm (14.3 in)137.0 mm (5.4 in)5483 of 100 (Exceptional)
2026-08-07MishimaRecord daily precipitation413.0 mm (16.3 in)142.0 mm (5.6 in)5683 of 100 (Exceptional)
2026-08-07YokkaichiRecord daily precipitation435.0 mm (17.1 in)164.0 mm (6.5 in)5281 of 100 (Exceptional)
2026-08-07TadotsuRecord daily precipitation342.0 mm (13.5 in)143.5 mm (5.6 in)4279 of 100 (Major)
2026-08-07HakodateRecord daily precipitation235.0 mm (9.3 in)98.8 mm (3.9 in)6777 of 100 (Major)
2026-08-07AbashiriRecord daily precipitation216.0 mm (8.5 in)65.9 mm (2.6 in)3176 of 100 (Major)
2026-08-07TomakomaiRecord daily precipitation145.5 mm (5.7 in)126.5 mm (5.0 in)4761 of 100 (Major)
2026-08-07MitoRecord daily precipitation113.5 mm (4.5 in)72.1 mm (2.8 in)6858 of 100 (Notable)
2026-08-07ObihiroRecord daily precipitation110.0 mm (4.3 in)77.0 mm (3.0 in)1351 of 100 (Notable)
2026-08-07GifuRecord daily precipitation108.5 mm (4.3 in)59.9 mm (2.4 in)6851 of 100 (Notable)
2026-08-07MombetsuRecord daily precipitation105.5 mm (4.2 in)75.5 mm (3.0 in)1250 of 100 (Notable)
2026-08-07WakamatsuRecord daily precipitation141.0 mm (5.6 in)15.0 mm (0.6 in)3136 of 100 (Notable)
2026-08-07ShizuokaRecord daily precipitation232.0 mm (9.1 in)3.5 mm (0.14 in)5434 of 100 (Routine)
2026-08-07FukuiRecord daily precipitation72.0 mm (2.8 in)16.5 mm (0.6 in)5129 of 100 (Routine)
2026-08-07IrakoRecord daily precipitation136.0 mm (5.4 in)56.0 mm (2.2 in)827 of 100 (Routine)
2026-08-07HamadaRecord daily precipitation77.5 mm (3.1 in)14.5 mm (0.6 in)3623 of 100 (Routine)
2026-08-07OtaruRecord daily precipitation26.0 mm (1.0 in)0.6 mm (0.02 in)3317 of 100 (Routine)
2026-08-07KofuRecord daily precipitation64.5 mm (2.5 in)7.1 mm (0.28 in)812 of 100 (Routine)
2026-08-08MombetsuRecord daily precipitation223.0 mm (8.8 in)75.0 mm (3.0 in)5282 of 100 (Exceptional)
2026-08-08HakodateRecord daily precipitation393.0 mm (15.5 in)123.0 mm (4.8 in)3577 of 100 (Major)
2026-08-08NaraRecord daily precipitation251.5 mm (9.9 in)69.2 mm (2.7 in)6670 of 100 (Major)
2026-08-08SuttsuRecord daily precipitation330.5 mm (13.0 in)99.5 mm (3.9 in)067 of 100 (Major)
2026-08-08KutchanRecord daily precipitation423.0 mm (16.7 in)206.0 mm (8.1 in)067 of 100 (Major)
2026-08-08AkitaRecord daily precipitation391.0 mm (15.4 in)123.0 mm (4.8 in)067 of 100 (Major)
2026-08-08MatsuyamaRecord daily precipitation230.0 mm (9.1 in)170.7 mm (6.7 in)6767 of 100 (Major)
2026-08-08TadotsuRecord daily precipitation339.0 mm (13.3 in)293.2 mm (11.5 in)6767 of 100 (Major)
2026-08-08YokkaichiRecord daily precipitation153.0 mm (6.0 in)95.1 mm (3.7 in)2351 of 100 (Notable)
2026-08-08FukuyamaRecord daily precipitation140.0 mm (5.5 in)97.1 mm (3.8 in)1250 of 100 (Notable)
2026-08-08MishimaRecord daily precipitation118.5 mm (4.7 in)68.3 mm (2.7 in)6748 of 100 (Notable)
2026-08-08Kure Reg Met HQRecord daily precipitation297.5 mm (11.7 in)61.5 mm (2.4 in)046 of 100 (Notable)
2026-08-08OsakaRecord daily precipitation197.5 mm (7.8 in)49.4 mm (1.9 in)944 of 100 (Notable)
2026-08-08TomakomaiRecord daily precipitation154.0 mm (6.1 in)63.1 mm (2.5 in)3143 of 100 (Notable)
2026-08-08TajimaRecord daily precipitation139.0 mm (5.5 in)14.0 mm (0.6 in)4439 of 100 (Notable)
2026-08-08RumoiRecord daily precipitation154.0 mm (6.1 in)6.5 mm (0.26 in)5235 of 100 (Notable)
2026-08-08HamamatsuRecord daily precipitation377.5 mm (14.9 in)14.5 mm (0.6 in)032 of 100 (Routine)
2026-08-08TakayamaRecord daily precipitation102.5 mm (4.0 in)28.6 mm (1.1 in)822 of 100 (Routine)
2026-08-09MatsuyamaRecord daily precipitation313.0 mm (12.3 in)67.9 mm (2.7 in)865 of 100 (Major)
2026-08-09TadotsuRecord daily precipitation160.5 mm (6.3 in)79.5 mm (3.1 in)1652 of 100 (Notable)
2026-08-09TajimaRecord daily precipitation84.5 mm (3.3 in)32.8 mm (1.3 in)6748 of 100 (Notable)
2026-08-09AkitaRecord daily precipitation97.5 mm (3.8 in)30.4 mm (1.2 in)3331 of 100 (Routine)
2026-08-10AkitaRecord daily precipitation157.0 mm (6.2 in)77.0 mm (3.0 in)746 of 100 (Notable)
2026-08-10MishimaRecord daily precipitation106.0 mm (4.2 in)44.0 mm (1.7 in)3732 of 100 (Routine)
2026-08-10TadotsuRecord daily precipitation61.0 mm (2.4 in)1.5 mm (0.06 in)6325 of 100 (Routine)
2026-08-11NagasakiRecord daily precipitation519.5 mm (20.5 in)267.5 mm (10.5 in)6977 of 100 (Major)
2026-08-11TadotsuRecord daily precipitation158.0 mm (6.2 in)110.1 mm (4.3 in)6566 of 100 (Major)
2026-08-11NiigataRecord daily precipitation122.5 mm (4.8 in)74.7 mm (2.9 in)6562 of 100 (Major)
2026-08-11HamadaRecord daily precipitation152.0 mm (6.0 in)120.5 mm (4.7 in)4961 of 100 (Major)
2026-08-11TajimaRecord daily precipitation68.0 mm (2.7 in)48.8 mm (1.9 in)6557 of 100 (Notable)
2026-08-11SuwaRecord daily precipitation94.5 mm (3.7 in)53.0 mm (2.1 in)5656 of 100 (Notable)
2026-08-11Sasebo Reg Met HQRecord daily precipitation124.5 mm (4.9 in)46.5 mm (1.8 in)5539 of 100 (Notable)
2026-08-11MiyakonojoRecord daily precipitation92.0 mm (3.6 in)55.5 mm (2.2 in)3733 of 100 (Routine)
2026-08-11WakkanaiRecord daily precipitation96.0 mm (3.8 in)11.8 mm (0.5 in)6132 of 100 (Routine)
2026-08-11TanegashimaRecord daily precipitation118.5 mm (4.7 in)19.5 mm (0.8 in)5330 of 100 (Routine)
2026-08-11UenoRecord daily precipitation86.5 mm (3.4 in)24.8 mm (1.0 in)2725 of 100 (Routine)
2026-08-11HakodateRecord daily precipitation90.0 mm (3.5 in)27.0 mm (1.1 in)1224 of 100 (Routine)
2026-08-11ChichibuRecord daily precipitation55.5 mm (2.2 in)21.0 mm (0.8 in)3724 of 100 (Routine)
2026-08-11KochiRecord daily precipitation138.0 mm (5.4 in)45.5 mm (1.8 in)1323 of 100 (Routine)
2026-08-11AkitaRecord daily precipitation55.5 mm (2.2 in)25.5 mm (1.0 in)1222 of 100 (Routine)
2026-08-11FukuokaRecord daily precipitation46.0 mm (1.8 in)8.0 mm (0.31 in)4422 of 100 (Routine)
2026-08-11Fukushima ArptRecord daily precipitation66.5 mm (2.6 in)3.0 mm (0.12 in)3719 of 100 (Routine)
2026-08-11YamaguchiRecord daily precipitation212.0 mm (8.3 in)6.0 mm (0.24 in)419 of 100 (Routine)
2026-08-11HachinoheRecord daily precipitation87.5 mm (3.4 in)2.7 mm (0.11 in)2415 of 100 (Routine)
2026-08-11MombetsuRecord daily precipitation51.5 mm (2.0 in)4.5 mm (0.18 in)1213 of 100 (Routine)
2026-08-11AburatsuRecord daily precipitation (tie)46.0 mm (1.8 in)tie535 of 100 (Routine)
2026-08-12ObihiroRecord daily precipitation232.5 mm (9.2 in)86.5 mm (3.4 in)4570 of 100 (Major)
2026-08-12HamamatsuRecord daily precipitation170.5 mm (6.7 in)97.7 mm (3.8 in)6763 of 100 (Major)
2026-08-12HamadaRecord daily precipitation406.5 mm (16.0 in)118.5 mm (4.7 in)1260 of 100 (Major)
2026-08-12OtaruRecord daily precipitation125.5 mm (4.9 in)67.5 mm (2.7 in)4459 of 100 (Notable)
2026-08-12MitoRecord daily precipitation232.0 mm (9.1 in)183.0 mm (7.2 in)3758 of 100 (Notable)
2026-08-12TanegashimaRecord daily precipitation285.5 mm (11.2 in)57.5 mm (2.3 in)4351 of 100 (Notable)
2026-08-12WakkanaiRecord daily precipitation135.5 mm (5.3 in)58.5 mm (2.3 in)3250 of 100 (Notable)
2026-08-12Sasebo Reg Met HQRecord daily precipitation265.0 mm (10.4 in)31.5 mm (1.2 in)4841 of 100 (Notable)
2026-08-12TakamatsuRecord daily precipitation47.0 mm (1.9 in)27.0 mm (1.1 in)6741 of 100 (Notable)
2026-08-12AikawaRecord daily precipitation73.5 mm (2.9 in)41.5 mm (1.6 in)2435 of 100 (Notable)
2026-08-12SakaiRecord daily precipitation76.0 mm (3.0 in)46.5 mm (1.8 in)2435 of 100 (Notable)
2026-08-12ShionomisakiRecord daily precipitation168.5 mm (6.6 in)28.5 mm (1.1 in)6535 of 100 (Notable)
2026-08-12MaebashiRecord daily precipitation137.5 mm (5.4 in)16.9 mm (0.7 in)6734 of 100 (Routine)
2026-08-12HakodateRecord daily precipitation63.0 mm (2.5 in)29.5 mm (1.2 in)3733 of 100 (Routine)
2026-08-12OmuRecord daily precipitation88.5 mm (3.5 in)19.0 mm (0.7 in)4432 of 100 (Routine)
2026-08-12Maizuru Reg Met HQRecord daily precipitation199.0 mm (7.8 in)32.9 mm (1.3 in)232 of 100 (Routine)
2026-08-12HitoyoshiRecord daily precipitation205.5 mm (8.1 in)67.6 mm (2.7 in)432 of 100 (Routine)
2026-08-12FukauraRecord daily precipitation314.5 mm (12.4 in)30.5 mm (1.2 in)431 of 100 (Routine)
2026-08-12OshimaRecord daily precipitation98.5 mm (3.9 in)10.6 mm (0.4 in)6729 of 100 (Routine)
2026-08-12NagasakiRecord daily precipitation204.5 mm (8.1 in)52.6 mm (2.1 in)425 of 100 (Routine)
2026-08-12MatsueRecord daily precipitation62.5 mm (2.5 in)23.9 mm (0.9 in)1621 of 100 (Routine)
2026-08-12OnahamaRecord daily precipitation43.0 mm (1.7 in)1.5 mm (0.06 in)3718 of 100 (Routine)
2026-08-12TsuyamaRecord daily precipitation36.5 mm (1.4 in)12.9 mm (0.5 in)1618 of 100 (Routine)
2026-08-12FukuokaRecord daily precipitation145.0 mm (5.7 in)10.9 mm (0.4 in)2818 of 100 (Routine)
2026-08-12TajimaRecord daily precipitation139.5 mm (5.5 in)0.5 mm (0.02 in)017 of 100 (Routine)
2026-08-12KitamiesashiRecord daily precipitation43.5 mm (1.7 in)1.6 mm (0.06 in)1211 of 100 (Routine)
2026-08-13KochiRecord daily precipitation647.0 mm (25.5 in)352.5 mm (13.9 in)5072 of 100 (Major)
2026-08-13KofuRecord daily precipitation456.5 mm (18.0 in)171.0 mm (6.7 in)067 of 100 (Major)
2026-08-13EsashiRecord daily precipitation120.0 mm (4.7 in)68.6 mm (2.7 in)6860 of 100 (Major)
2026-08-13HakodateRecord daily precipitation259.0 mm (10.2 in)221.9 mm (8.7 in)3357 of 100 (Notable)
2026-08-13HitaRecord daily precipitation263.5 mm (10.4 in)64.6 mm (2.5 in)445 of 100 (Notable)
2026-08-13NikkoRecord daily precipitation150.0 mm (5.9 in)96.9 mm (3.8 in)436 of 100 (Notable)
2026-08-13TomakomaiRecord daily precipitation148.0 mm (5.8 in)12.7 mm (0.5 in)6832 of 100 (Routine)
2026-08-13SumotoRecord daily precipitation70.0 mm (2.8 in)18.6 mm (0.7 in)6532 of 100 (Routine)
2026-08-13TokushimaRecord daily precipitation122.5 mm (4.8 in)38.0 mm (1.5 in)3729 of 100 (Routine)
2026-08-13KitamiesashiRecord daily precipitation40.5 mm (1.6 in)3.5 mm (0.14 in)5626 of 100 (Routine)
2026-08-13Sasebo Reg Met HQRecord daily precipitation60.5 mm (2.4 in)21.5 mm (0.8 in)3925 of 100 (Routine)
2026-08-13SendaiRecord daily precipitation52.5 mm (2.1 in)10.6 mm (0.4 in)2720 of 100 (Routine)
2026-08-13MatsuyamaRecord daily precipitation69.0 mm (2.7 in)20.0 mm (0.8 in)418 of 100 (Routine)
2026-08-14SuwaRecord daily precipitation232.0 mm (9.1 in)61.1 mm (2.4 in)455 of 100 (Notable)
2026-08-14ShizuokaRecord daily precipitation167.0 mm (6.6 in)74.5 mm (2.9 in)1332 of 100 (Routine)
2026-08-14NaraRecord daily precipitation137.0 mm (5.4 in)39.0 mm (1.5 in)1329 of 100 (Routine)
2026-08-14SumotoRecord daily precipitation136.5 mm (5.4 in)32.6 mm (1.3 in)2323 of 100 (Routine)
2026-08-14KochiRecord daily precipitation119.0 mm (4.7 in)7.5 mm (0.30 in)3620 of 100 (Routine)
2026-08-15FukuyamaRecord daily precipitation216.5 mm (8.5 in)65.5 mm (2.6 in)5065 of 100 (Major)
2026-08-15HamamatsuRecord daily precipitation262.5 mm (10.3 in)172.6 mm (6.8 in)2353 of 100 (Notable)
2026-08-15Kure Reg Met HQRecord daily precipitation408.0 mm (16.1 in)28.5 mm (1.1 in)040 of 100 (Notable)
2026-08-15IrakoRecord daily precipitation211.0 mm (8.3 in)89.1 mm (3.5 in)336 of 100 (Notable)
2026-08-15OmuRecord daily precipitation73.5 mm (2.9 in)33.1 mm (1.3 in)1532 of 100 (Routine)
2026-08-15KutchanRecord daily precipitation42.0 mm (1.7 in)15.5 mm (0.6 in)5531 of 100 (Routine)
2026-08-15KaruizawaRecord daily precipitation91.5 mm (3.6 in)19.5 mm (0.8 in)4329 of 100 (Routine)
2026-08-15TakayamaRecord daily precipitation112.5 mm (4.4 in)33.5 mm (1.3 in)1327 of 100 (Routine)
2026-08-15KofuRecord daily precipitation80.5 mm (3.2 in)2.8 mm (0.11 in)2515 of 100 (Routine)
2026-08-15WakamatsuRecord daily precipitation26.5 mm (1.0 in)3.9 mm (0.15 in)410 of 100 (Routine)
2026-08-16MitoRecord daily precipitation218.0 mm (8.6 in)173.5 mm (6.8 in)4861 of 100 (Major)
2026-08-16IrakoRecord daily precipitation215.5 mm (8.5 in)167.0 mm (6.6 in)4359 of 100 (Notable)
2026-08-16MoriokaRecord daily precipitation151.0 mm (5.9 in)33.0 mm (1.3 in)4747 of 100 (Notable)
2026-08-16Fukushima ArptRecord daily precipitation69.0 mm (2.7 in)27.0 mm (1.1 in)4536 of 100 (Notable)
2026-08-16YonagoRecord daily precipitation61.5 mm (2.4 in)20.3 mm (0.8 in)6335 of 100 (Notable)
2026-08-17TadotsuRecord daily precipitation148.0 mm (5.8 in)102.0 mm (4.0 in)5162 of 100 (Major)
2026-08-17WakamatsuRecord daily precipitation270.0 mm (10.6 in)129.0 mm (5.1 in)057 of 100 (Notable)
2026-08-17TajimaRecord daily precipitation74.0 mm (2.9 in)49.3 mm (1.9 in)6357 of 100 (Notable)
2026-08-17HakodateRecord daily precipitation243.5 mm (9.6 in)144.4 mm (5.7 in)849 of 100 (Notable)
2026-08-17MitoRecord daily precipitation205.5 mm (8.1 in)102.9 mm (4.1 in)949 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 138 of the 139 records the event counts. The counts above use the full total.

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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 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.