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Built 2026-10-19 (19 October 2026)

Extreme rain in Australia, 28 September 2026

Extreme rain in Australia, 28 September 2026: 8 records at 8 stations, peak on 28 September 2026. Closed.

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

Key Facts

  • Extreme rain in Australia, 28 September 2026 set or tied 8 station records at 8 stations.
  • It ran from 28 September 2026 to 28 September 2026 (1 days) and its peak day was 28 September 2026.
  • Status: closed.
  • Williamtown Raaf set a daily record precipitation of 18.2 mm (0.7 in) on 28 September 2026 (provisional).
  • The busiest day was 28 September 2026 with 8 records.
  • The oldest broken record in the ranked list had stood for 56 years.

Footprint

28 to 28 September 2026
Footprint of Extreme rain in Australia, 28 September 2026 The area covered by Extreme rain in Australia, 28 September 2026 is outlined, with 8 of the stations that set records marked, coloured by record type.
The area covered by Extreme rain in Australia, 28 September 2026 is outlined, with 8 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Extreme rain in Australia, 28 September 2026: stations that set records in the event
StationTypeValueDate
Williamtown RaafRecord daily precipitation18.2 mm (0.7 in)2026-09-28
Yarramalong (Lewensbrook)Record daily precipitation15.0 mm (0.6 in)2026-09-28
Cessnock Airport AWSRecord daily precipitation11.0 mm (0.4 in)2026-09-28
Upper Allyn TownshipRecord daily precipitation15.0 mm (0.6 in)2026-09-28
Mangrove Mountain AWSRecord daily precipitation21.4 mm (0.8 in)2026-09-28
Swansea (Catherine St)Record daily precipitation24.2 mm (1.0 in)2026-09-28
Norah Head AWSRecord daily precipitation12.4 mm (0.5 in)2026-09-28
Wattamolla (Griffiths)Record daily precipitation11.0 mm (0.4 in)2026-09-28

Records per Day

Peak day 8
Records per day during Extreme rain in Australia, 28 September 2026 Records set or tied each day from 28 September 2026 to 28 September 2026. The most in one day was 8 on 28 September 2026. 0 2 4 6 8 09-28
Records set or tied each day from 28 September 2026 to 28 September 2026. The most in one day was 8 on 28 September 2026.
Records per day during Extreme rain in Australia, 28 September 2026
DateRecords
2026-09-288

Top Records by Margin

Margin over the record replaced
Top records of Extreme rain in Australia, 28 September 2026 ranked by margin
Mangrove Mountain AWS, 09-2813.4 mm (0.5 in)
Swansea (Catherine St), 09-2811.4 mm (0.4 in)
Wattamolla (Griffiths), 09-287.2 mm (0.28 in)
Upper Allyn Township, 09-286.0 mm (0.24 in)
Norah Head AWS, 09-285.4 mm (0.21 in)
Williamtown Raaf, 09-284.8 mm (0.19 in)
Yarramalong (Lewensbrook), 09-283.0 mm (0.12 in)
Cessnock Airport AWS, 09-280.3 mm (0.01 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 Australia, 28 September 2026 8 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 15 30 45 60 0481115 Margin (mm) Years the old record stood
8 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 Australia, 28 September 2026
Margin (mm)Years the old record stood
548
344
056
1327
1129
637
525
721

Compared With Other Events

Station records per event
Station records in Extreme rain in Australia, 28 September 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 Australia, 28 September 2026 (this event)8 records

Every Record Set

8 of 8
Every record set or tied during Extreme rain in Australia, 28 September 2026, in date order
DateStationRecordValueMarginYears stoodSignificance
2026-09-28Williamtown RaafRecord daily precipitation (provisional)18.2 mm (0.7 in)4.8 mm (0.19 in)4820 of 100 (Routine)
2026-09-28Yarramalong (Lewensbrook)Record daily precipitation (provisional)15.0 mm (0.6 in)3.0 mm (0.12 in)4420 of 100 (Routine)
2026-09-28Cessnock Airport AWSRecord daily precipitation (provisional)11.0 mm (0.4 in)0.3 mm (0.01 in)5620 of 100 (Routine)
2026-09-28Upper Allyn TownshipRecord daily precipitation (provisional)15.0 mm (0.6 in)6.0 mm (0.24 in)3720 of 100 (Routine)
2026-09-28Mangrove Mountain AWSRecord daily precipitation (provisional)21.4 mm (0.8 in)13.4 mm (0.5 in)2720 of 100 (Routine)
2026-09-28Swansea (Catherine St)Record daily precipitation (provisional)24.2 mm (1.0 in)11.4 mm (0.4 in)2920 of 100 (Routine)
2026-09-28Norah Head AWSRecord daily precipitation (provisional)12.4 mm (0.5 in)5.4 mm (0.21 in)2515 of 100 (Routine)
2026-09-28Wattamolla (Griffiths)Record daily precipitation (provisional)11.0 mm (0.4 in)7.2 mm (0.28 in)2112 of 100 (Routine)

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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.