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Built 2026-10-19 (19 October 2026)

Extreme rain in United States, 15 to 17 August 2026

Extreme rain in United States, 15 to 17 August 2026: 27 records at 22 stations, peak on 16 August 2026. Closed.

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

Key Facts

  • Extreme rain in United States, 15 to 17 August 2026 set or tied 27 station records at 22 stations.
  • It ran from 15 August 2026 to 17 August 2026 (3 days) and its peak day was 16 August 2026.
  • Status: closed.
  • Nuuanu Rsch 4 783 set a monthly record daily precipitation of 248.2 mm (9.8 in) on 16 August 2026.
  • The busiest day was 16 August 2026 with 16 records.
  • The oldest broken record in the ranked list had stood for 89 years.

Footprint

15 to 17 August 2026
Footprint of Extreme rain in United States, 15 to 17 August 2026 The area covered by Extreme rain in United States, 15 to 17 August 2026 is outlined, with 19 of the stations that set records marked, coloured by record type.
The area covered by Extreme rain in United States, 15 to 17 August 2026 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Extreme rain in United States, 15 to 17 August 2026: stations that set records in the event
StationTypeValueDate
Nuuanu Rsch 4 783Record daily precipitation248.2 mm (9.8 in)2026-08-16
Pauoa Flats 784Record daily precipitation268.2 mm (10.6 in)2026-08-16
Lanai AP 656Record daily precipitation84.8 mm (3.3 in)2026-08-16
Hilo Intl AP 87Record daily precipitation148.1 mm (5.8 in)2026-08-16
Kalihi Rsch Site 777Record daily precipitation212.3 mm (8.4 in)2026-08-16
Palolo Vly 718Record daily precipitation197.1 mm (7.8 in)2026-08-16
Kaneohe Bay MCASRecord daily precipitation55.4 mm (2.2 in)2026-08-16
Waialae-Kahala 715Record daily precipitation57.2 mm (2.3 in)2026-08-16
Puhi 1013Record daily precipitation64.8 mm (2.6 in)2026-08-17
Molokai Kaunakakai Molokai APRecord daily precipitation45.0 mm (1.8 in)2026-08-16
Beretania Pump STN 705Record daily precipitation30.2 mm (1.2 in)2026-08-15
Koloa 936Record daily precipitation63.5 mm (2.5 in)2026-08-17
Naalehu 14Record daily precipitation279.4 mm (11.0 in)2026-08-16
Waihee 837.5Record daily precipitation61.0 mm (2.4 in)2026-08-17
Manoa Lyon Arbo 785.2Record daily precipitation207.0 mm (8.1 in)2026-08-16
Kii-Kahuku 911Record daily precipitation38.4 mm (1.5 in)2026-08-16
Aiea Hts 764.6Record daily precipitation49.0 mm (1.9 in)2026-08-17
Kapaka Farm 904.1Record daily precipitation78.7 mm (3.1 in)2026-08-17
Mahaulepu 941.1Record daily precipitation44.7 mm (1.8 in)2026-08-17
Kahului APRecord daily precipitation24.1 mm (0.9 in)2026-08-16
Honolulu Intl APRecord daily precipitation21.6 mm (0.9 in)2026-08-16

Records per Day

Peak day 16
Records per day during Extreme rain in United States, 15 to 17 August 2026 Records set or tied each day from 15 August 2026 to 17 August 2026. The most in one day was 16 on 16 August 2026. 0 5 10 15 20 08-1508-1608-17
Records set or tied each day from 15 August 2026 to 17 August 2026. The most in one day was 16 on 16 August 2026.
Records per day during Extreme rain in United States, 15 to 17 August 2026
DateRecords
2026-08-152
2026-08-1616
2026-08-179

Top Records by Margin

Margin over the record replaced
Top records of Extreme rain in United States, 15 to 17 August 2026 ranked by margin
Hilo Intl AP 87, 08-16102.1 mm (4.0 in)
Palolo Vly 718, 08-1689.9 mm (3.5 in)
Kalihi Rsch Site 777, 08-1673.6 mm (2.9 in)
Nuuanu Rsch 4 783, 08-1664.8 mm (2.6 in)
Pauoa Flats 784, 08-1663.5 mm (2.5 in)
Kapaka Farm 904.1, 08-1763.2 mm (2.5 in)
Manoa Lyon Arbo 785.2, 08-1654.6 mm (2.1 in)
Waialae-Kahala 715, 08-1649.3 mm (1.9 in)
Waihee 837.5, 08-1746.5 mm (1.8 in)
Waihee 837.5, 08-1641.9 mm (1.6 in)
Lanai AP 656, 08-1635.3 mm (1.4 in)
Kaneohe Bay MCAS, 08-1632.5 mm (1.3 in)
Kii-Kahuku 911, 08-1631.3 mm (1.2 in)
Puhi 1013, 08-1727.2 mm (1.1 in)
Aiea Hts 764.6, 08-1726.9 mm (1.1 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 United States, 15 to 17 August 2026 27 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 25 50 75 100 0306090120 Margin (mm) Years the old record stood
27 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 United States, 15 to 17 August 2026
Margin (mm)Years the old record stood
6543
6468
3542
10269
7444
9044
3344
2760
4944
2733
2731
2644
1989
4728
554
4228
2733
314
939
633
363
4456
1729
1876
860
744
1648

Compared With Other Events

Station records per event
Station records in Extreme rain in United States, 15 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 United States, 15 to 17 August 2026 (this event)27 records

Every Record Set

24 of 27
Every record set or tied during Extreme rain in United States, 15 to 17 August 2026, in date order
DateStationRecordValueMarginYears stoodSignificance
2026-08-15Beretania Pump STN 705Record daily precipitation30.2 mm (1.2 in)26.6 mm (1.0 in)3155 of 100 (Notable)
2026-08-16Nuuanu Rsch 4 783Record daily precipitation248.2 mm (9.8 in)64.8 mm (2.6 in)4371 of 100 (Major)
2026-08-16Pauoa Flats 784Record daily precipitation268.2 mm (10.6 in)63.5 mm (2.5 in)6871 of 100 (Major)
2026-08-16Lanai AP 656Record daily precipitation84.8 mm (3.3 in)35.3 mm (1.4 in)4269 of 100 (Major)
2026-08-16Hilo Intl AP 87Record daily precipitation148.1 mm (5.8 in)102.1 mm (4.0 in)6967 of 100 (Major)
2026-08-16Kalihi Rsch Site 777Record daily precipitation212.3 mm (8.4 in)73.6 mm (2.9 in)4463 of 100 (Major)
2026-08-16Palolo Vly 718Record daily precipitation197.1 mm (7.8 in)89.9 mm (3.5 in)4461 of 100 (Major)
2026-08-16Kaneohe Bay MCASRecord daily precipitation55.4 mm (2.2 in)32.5 mm (1.3 in)4461 of 100 (Major)
2026-08-16Waialae-Kahala 715Record daily precipitation57.2 mm (2.3 in)49.3 mm (1.9 in)4460 of 100 (Major)
2026-08-16Molokai Kaunakakai Molokai APRecord daily precipitation45.0 mm (1.8 in)26.7 mm (1.1 in)3357 of 100 (Notable)
2026-08-16Naalehu 14Record daily precipitation279.4 mm (11.0 in)19.0 mm (0.7 in)8954 of 100 (Notable)
2026-08-16Manoa Lyon Arbo 785.2Record daily precipitation207.0 mm (8.1 in)54.6 mm (2.1 in)449 of 100 (Notable)
2026-08-16Waihee 837.5Record daily precipitation61.0 mm (2.4 in)41.9 mm (1.6 in)2849 of 100 (Notable)
2026-08-16Kii-Kahuku 911Record daily precipitation38.4 mm (1.5 in)31.3 mm (1.2 in)445 of 100 (Notable)
2026-08-16Aiea Hts 764.6Record daily precipitation129.5 mm (5.1 in)16.5 mm (0.6 in)2941 of 100 (Notable)
2026-08-16Kahului APRecord daily precipitation24.1 mm (0.9 in)8.6 mm (0.34 in)3920 of 100 (Routine)
2026-08-16Honolulu Intl APRecord daily precipitation21.6 mm (0.9 in)7.9 mm (0.31 in)6020 of 100 (Routine)
2026-08-17Puhi 1013Record daily precipitation64.8 mm (2.6 in)27.2 mm (1.1 in)6060 of 100 (Major)
2026-08-17Koloa 936Record daily precipitation63.5 mm (2.5 in)26.4 mm (1.0 in)4455 of 100 (Notable)
2026-08-17Waihee 837.5Record daily precipitation61.0 mm (2.4 in)46.5 mm (1.8 in)2852 of 100 (Notable)
2026-08-17Aiea Hts 764.6Record daily precipitation49.0 mm (1.9 in)26.9 mm (1.1 in)3345 of 100 (Notable)
2026-08-17Kapaka Farm 904.1Record daily precipitation78.7 mm (3.1 in)63.2 mm (2.5 in)344 of 100 (Notable)
2026-08-17Mahaulepu 941.1Record daily precipitation44.7 mm (1.8 in)6.6 mm (0.26 in)4429 of 100 (Routine)
2026-08-17Manoa Lyon Arbo 785.2Record daily precipitation71.1 mm (2.8 in)16.2 mm (0.6 in)4828 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 24 of the 27 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 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.