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Data as of 2026-10-18
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Built 2026-10-19 (19 October 2026)

Extreme rain in Japan, 25 July to 1 August 2026

Extreme rain in Japan, 25 July to 1 August 2026: 30 records at 18 stations, peak on 28 July 2026. Closed.

Data as of . Last revised (2026-10-18).

Key Facts

  • Extreme rain in Japan, 25 July to 1 August 2026 set or tied 30 station records at 18 stations.
  • It ran from 25 July 2026 to 1 August 2026 (8 days) and its peak day was 28 July 2026.
  • Status: closed.
  • Suttsu set a daily record precipitation of 221.0 mm (8.7 in) on 26 July 2026.
  • The busiest day was 28 July 2026 with 10 records.
  • The oldest broken record in the ranked list had stood for 73 years.

Footprint

25 July to 1 August 2026
Footprint of Extreme rain in Japan, 25 July to 1 August 2026 The area covered by Extreme rain in Japan, 25 July to 1 August 2026 is outlined, with 12 of the stations that set records marked, coloured by record type.
The area covered by Extreme rain in Japan, 25 July to 1 August 2026 is outlined, with 12 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Extreme rain in Japan, 25 July to 1 August 2026: stations that set records in the event
StationTypeValueDate
SuttsuRecord daily precipitation221.0 mm (8.7 in)2026-07-26
KitamiesashiRecord daily precipitation290.0 mm (11.4 in)2026-07-28
OmuRecord daily precipitation91.0 mm (3.6 in)2026-07-25
SapporoRecord daily precipitation73.0 mm (2.9 in)2026-07-30
HirooRecord daily precipitation237.0 mm (9.3 in)2026-07-26
NemuroRecord daily precipitation120.5 mm (4.7 in)2026-07-26
RumoiRecord daily precipitation192.0 mm (7.6 in)2026-07-28
IwamizawaRecord daily precipitation157.0 mm (6.2 in)2026-07-28
WakkanaiRecord daily precipitation73.5 mm (2.9 in)2026-07-28
ObihiroRecord daily precipitation251.5 mm (9.9 in)2026-07-28
KutchanRecord daily precipitation217.0 mm (8.5 in)2026-07-28
FukauraRecord daily precipitation97.5 mm (3.8 in)2026-07-28
AbashiriRecord daily precipitation32.5 mm (1.3 in)2026-07-27
HakodateRecord daily precipitation77.0 mm (3.0 in)2026-07-30
HachinoheRecord daily precipitation52.0 mm (2.0 in)2026-07-30
MiyakoRecord daily precipitation44.5 mm (1.8 in)2026-07-25
HaboroRecord daily precipitation48.0 mm (1.9 in)2026-07-27

Records per Day

Peak day 10
Records per day during Extreme rain in Japan, 25 July to 1 August 2026 Records set or tied each day from 25 July 2026 to 1 August 2026. The most in one day was 10 on 28 July 2026. 0 3 5 8 10 07-2507-2607-2707-2807-2907-3007-3108-01
Records set or tied each day from 25 July 2026 to 1 August 2026. The most in one day was 10 on 28 July 2026.
Records per day during Extreme rain in Japan, 25 July to 1 August 2026
DateRecords
2026-07-252
2026-07-265
2026-07-275
2026-07-2810
2026-07-292
2026-07-304
2026-07-311
2026-08-011

Top Records by Margin

Margin over the record replaced
Top records of Extreme rain in Japan, 25 July to 1 August 2026 ranked by margin
Hiroo, 07-26208.0 mm (8.2 in)
Suttsu, 07-26178.7 mm (7.0 in)
Suttsu, 07-30176.1 mm (6.9 in)
Kitamiesashi, 07-28147.5 mm (5.8 in)
Rumoi, 07-28135.1 mm (5.3 in)
Suttsu, 07-28122.6 mm (4.8 in)
Iwamizawa, 07-28115.1 mm (4.5 in)
Nemuro, 07-2687.0 mm (3.4 in)
Hiroo, 07-2877.0 mm (3.0 in)
Omu, 07-2558.1 mm (2.3 in)
Hiroo, 07-2751.0 mm (2.0 in)
Sapporo, 07-3046.9 mm (1.8 in)
Fukaura, 07-2831.5 mm (1.2 in)
Suttsu, 07-2723.5 mm (0.9 in)
Wakkanai, 07-2822.0 mm (0.9 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, 25 July to 1 August 2026 30 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 063125188250 Margin (mm) Years the old record stood
30 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, 25 July to 1 August 2026
Margin (mm)Years the old record stood
17973
1480
5865
4764
17627
8716
12319
20820
1359
1159
779
2272
180
2472
190
5120
3232
60
2120
751
548
221
2116
2116
345
1116
87
108
144
51

Compared With Other Events

Station records per event
Station records in Extreme rain in Japan, 25 July to 1 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, 25 July to 1 August 2026 (this event)30 records

Every Record Set

29 of 30
Every record set or tied during Extreme rain in Japan, 25 July to 1 August 2026, in date order
DateStationRecordValueMarginYears stoodSignificance
2026-07-25OmuRecord daily precipitation91.0 mm (3.6 in)58.1 mm (2.3 in)6566 of 100 (Major)
2026-07-25HirooRecord daily precipitation56.0 mm (2.2 in)20.9 mm (0.8 in)1621 of 100 (Routine)
2026-07-25MiyakoRecord daily precipitation44.5 mm (1.8 in)7.4 mm (0.29 in)2317 of 100 (Routine)
2026-07-26SuttsuRecord daily precipitation221.0 mm (8.7 in)178.7 mm (7.0 in)7369 of 100 (Major)
2026-07-26NemuroRecord daily precipitation120.5 mm (4.7 in)87.0 mm (3.4 in)1652 of 100 (Notable)
2026-07-26HirooRecord daily precipitation237.0 mm (9.3 in)208.0 mm (8.2 in)2052 of 100 (Notable)
2026-07-26ObihiroRecord daily precipitation233.5 mm (9.2 in)5.5 mm (0.22 in)032 of 100 (Routine)
2026-07-26KutchanRecord daily precipitation35.0 mm (1.4 in)6.5 mm (0.26 in)5127 of 100 (Routine)
2026-07-27SuttsuRecord daily precipitation50.5 mm (2.0 in)23.5 mm (0.9 in)7243 of 100 (Notable)
2026-07-27HirooRecord daily precipitation98.0 mm (3.9 in)51.0 mm (2.0 in)2037 of 100 (Notable)
2026-07-27OmuRecord daily precipitation94.5 mm (3.7 in)20.6 mm (0.8 in)2028 of 100 (Routine)
2026-07-27AbashiriRecord daily precipitation32.5 mm (1.3 in)4.5 mm (0.18 in)4826 of 100 (Routine)
2026-07-27HaboroRecord daily precipitation48.0 mm (1.9 in)8.1 mm (0.32 in)715 of 100 (Routine)
2026-07-28KitamiesashiRecord daily precipitation290.0 mm (11.4 in)147.5 mm (5.8 in)067 of 100 (Major)
2026-07-28SuttsuRecord daily precipitation150.0 mm (5.9 in)122.6 mm (4.8 in)1952 of 100 (Notable)
2026-07-28RumoiRecord daily precipitation192.0 mm (7.6 in)135.1 mm (5.3 in)949 of 100 (Notable)
2026-07-28IwamizawaRecord daily precipitation157.0 mm (6.2 in)115.1 mm (4.5 in)949 of 100 (Notable)
2026-07-28HirooRecord daily precipitation122.0 mm (4.8 in)77.0 mm (3.0 in)947 of 100 (Notable)
2026-07-28WakkanaiRecord daily precipitation73.5 mm (2.9 in)22.0 mm (0.9 in)7245 of 100 (Notable)
2026-07-28ObihiroRecord daily precipitation251.5 mm (9.9 in)18.0 mm (0.7 in)043 of 100 (Notable)
2026-07-28KutchanRecord daily precipitation217.0 mm (8.5 in)18.5 mm (0.7 in)041 of 100 (Notable)
2026-07-28FukauraRecord daily precipitation97.5 mm (3.8 in)31.5 mm (1.2 in)3233 of 100 (Routine)
2026-07-29ObihiroRecord daily precipitation48.5 mm (1.9 in)21.6 mm (0.9 in)126 of 100 (Routine)
2026-07-29SapporoRecord daily precipitation57.5 mm (2.3 in)5.4 mm (0.21 in)111 of 100 (Routine)
2026-07-30SapporoRecord daily precipitation73.0 mm (2.9 in)46.9 mm (1.8 in)6466 of 100 (Major)
2026-07-30SuttsuRecord daily precipitation220.0 mm (8.7 in)176.1 mm (6.9 in)2755 of 100 (Notable)
2026-07-30HakodateRecord daily precipitation77.0 mm (3.0 in)21.1 mm (0.8 in)1626 of 100 (Routine)
2026-07-30HachinoheRecord daily precipitation52.0 mm (2.0 in)11.1 mm (0.4 in)1620 of 100 (Routine)
2026-08-01MiyakoRecord daily precipitation66.0 mm (2.6 in)13.9 mm (0.5 in)414 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 29 of the 30 records the event counts. The counts above use the full total.

Related Headlines

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Download the Data

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 2026-10-18. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.