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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Extreme rain in Australia, 23 to 28 September 2020

Extreme rain in Australia, 23 to 28 September 2020: 117 records at 116 stations, peak on 25 September 2020. Closed.

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

Key Facts

  • Extreme rain in Australia, 23 to 28 September 2020 set or tied 117 station records at 116 stations.
  • It ran from 23 September 2020 to 28 September 2020 (6 days) and its peak day was 25 September 2020.
  • Status: closed.
  • Meadows set a monthly record daily precipitation of 86.0 mm (3.4 in) on 24 September 2020.
  • The busiest day was 25 September 2020 with 65 records.
  • The oldest broken record in the ranked list had stood for 135 years.

Footprint

23 to 28 September 2020
Footprint of Extreme rain in Australia, 23 to 28 September 2020 The area covered by Extreme rain in Australia, 23 to 28 September 2020 is outlined, with 20 of the stations that set records marked, coloured by record type.
The area covered by Extreme rain in Australia, 23 to 28 September 2020 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Extreme rain in Australia, 23 to 28 September 2020: stations that set records in the event
StationTypeValueDate
MeadowsRecord daily precipitation86.0 mm (3.4 in)2020-09-24
GeorgetownRecord daily precipitation31.8 mm (1.3 in)2020-09-25
NullawarreRecord daily precipitation35.0 mm (1.4 in)2020-09-25
Greenvale ReservoirRecord daily precipitation27.4 mm (1.1 in)2020-09-23
Cape Otway LighthouseRecord daily precipitation39.8 mm (1.6 in)2020-09-25
Wirrabara ForestRecord daily precipitation25.6 mm (1.0 in)2020-09-25
JamestownRecord daily precipitation25.6 mm (1.0 in)2020-09-25
DandenongRecord daily precipitation35.4 mm (1.4 in)2020-09-26
Glen Waverley (Golf Course)Record daily precipitation33.0 mm (1.3 in)2020-09-28
Wedderburn (Post Office)Record daily precipitation22.0 mm (0.9 in)2020-09-24
PeterboroughRecord daily precipitation17.2 mm (0.7 in)2020-09-25
Melrose (Para Gums)Record daily precipitation24.2 mm (1.0 in)2020-09-25
RivertonRecord daily precipitation22.6 mm (0.9 in)2020-09-25
EudundaRecord daily precipitation18.6 mm (0.7 in)2020-09-25
MerinoRecord daily precipitation22.0 mm (0.9 in)2020-09-25
Ivanhoe (Baden Park)Record daily precipitation10.0 mm (0.4 in)2020-09-26
Breadalbane (Old Post Office)Record daily precipitation14.8 mm (0.6 in)2020-09-26
Bowning (Wanganui)Record daily precipitation15.2 mm (0.6 in)2020-09-26
Pennyroyal CreekRecord daily precipitation21.4 mm (0.8 in)2020-09-26
Birregurra (Post Office)Record daily precipitation24.0 mm (0.9 in)2020-09-28

Records per Day

Peak day 65
Records per day during Extreme rain in Australia, 23 to 28 September 2020 Records set or tied each day from 23 September 2020 to 28 September 2020. The most in one day was 65 on 25 September 2020. 0 20 40 60 80 09-2309-2409-2509-2609-2709-28
Records set or tied each day from 23 September 2020 to 28 September 2020. The most in one day was 65 on 25 September 2020.
Records per day during Extreme rain in Australia, 23 to 28 September 2020
DateRecords
2020-09-232
2020-09-243
2020-09-2565
2020-09-2642
2020-09-272
2020-09-283

Top Records by Margin

Margin over the record replaced
Top records of Extreme rain in Australia, 23 to 28 September 2020 ranked by margin
Dandenong, 09-2619.6 mm (0.8 in)
Glen Waverley (Golf Course), 09-2817.8 mm (0.7 in)
Greenvale Reservoir, 09-2316.6 mm (0.7 in)
Meadows, 09-2416.1 mm (0.6 in)
Nullawarre, 09-2513.4 mm (0.5 in)
Georgetown, 09-2511.0 mm (0.4 in)
Pennyroyal Creek, 09-268.4 mm (0.33 in)
Ivanhoe (Baden Park), 09-267.7 mm (0.30 in)
Birregurra (Post Office), 09-287.0 mm (0.28 in)
Riverton, 09-256.1 mm (0.24 in)
Wirrabara Forest, 09-255.0 mm (0.20 in)
Breadalbane (Old Post Office), 09-264.4 mm (0.17 in)
Cape Otway Lighthouse, 09-254.2 mm (0.17 in)
Melrose (Para Gums), 09-253.9 mm (0.15 in)
Eudunda, 09-253.6 mm (0.14 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, 23 to 28 September 2020 117 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 38 75 113 150 05101520 Margin (mm) Years the old record stood
117 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, 23 to 28 September 2020
Margin (mm)Years the old record stood
16103
11126
8110
1370
1744
6135
8104
4126
4126
4118
777
5135
3135
2011
3104
394
3104
3104
1841
494
494
2126
1135
2109
1126
770
294
1135
0107
389
860
1341
660
185
1219
660
930
1228
828
841
1320
258
549
169
728
828
123
829
635
635
1019
1315
739
519
535
1019
1715
831
735
917
428
228
252
347
530
541
428
335
149
128
128
428
128
628
239
139
128
328
519
241
615
629
430
319
228
230
025
420
620
131
57
64
019
420
86
320
228
030
128
128
320
225
86
214
120
125
028
215
220
019
211
115
219
119
011
26
07

Compared With Other Events

Station records per event
Station records in Extreme rain in Australia, 23 to 28 September 2020 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, 23 to 28 September 2020 (this event)117 records

Every Record Set

20 of 117
Every record set or tied during Extreme rain in Australia, 23 to 28 September 2020, in date order
DateStationRecordValueMarginYears stoodSignificance
2020-09-23Greenvale ReservoirRecord daily precipitation27.4 mm (1.1 in)16.6 mm (0.7 in)4452 of 100 (Notable)
2020-09-24MeadowsRecord daily precipitation86.0 mm (3.4 in)16.1 mm (0.6 in)10369 of 100 (Major)
2020-09-24Wedderburn (Post Office)Record daily precipitation22.0 mm (0.9 in)2.7 mm (0.11 in)10420 of 100 (Routine)
2020-09-25GeorgetownRecord daily precipitation31.8 mm (1.3 in)11.0 mm (0.4 in)12656 of 100 (Notable)
2020-09-25NullawarreRecord daily precipitation35.0 mm (1.4 in)13.4 mm (0.5 in)7053 of 100 (Notable)
2020-09-25Cape Otway LighthouseRecord daily precipitation39.8 mm (1.6 in)4.2 mm (0.17 in)12647 of 100 (Notable)
2020-09-25Wirrabara ForestRecord daily precipitation25.6 mm (1.0 in)5.0 mm (0.20 in)13544 of 100 (Notable)
2020-09-25JamestownRecord daily precipitation25.6 mm (1.0 in)3.2 mm (0.13 in)13544 of 100 (Notable)
2020-09-25PeterboroughRecord daily precipitation17.2 mm (0.7 in)2.7 mm (0.11 in)9420 of 100 (Routine)
2020-09-25Melrose (Para Gums)Record daily precipitation24.2 mm (1.0 in)3.9 mm (0.15 in)9420 of 100 (Routine)
2020-09-25RivertonRecord daily precipitation22.6 mm (0.9 in)6.1 mm (0.24 in)13520 of 100 (Routine)
2020-09-25EudundaRecord daily precipitation18.6 mm (0.7 in)3.6 mm (0.14 in)12620 of 100 (Routine)
2020-09-25MerinoRecord daily precipitation22.0 mm (0.9 in)2.7 mm (0.11 in)10420 of 100 (Routine)
2020-09-26DandenongRecord daily precipitation35.4 mm (1.4 in)19.6 mm (0.8 in)1144 of 100 (Notable)
2020-09-26Ivanhoe (Baden Park)Record daily precipitation10.0 mm (0.4 in)7.7 mm (0.30 in)10420 of 100 (Routine)
2020-09-26Breadalbane (Old Post Office)Record daily precipitation14.8 mm (0.6 in)4.4 mm (0.17 in)11820 of 100 (Routine)
2020-09-26Bowning (Wanganui)Record daily precipitation15.2 mm (0.6 in)3.3 mm (0.13 in)10420 of 100 (Routine)
2020-09-26Pennyroyal CreekRecord daily precipitation21.4 mm (0.8 in)8.4 mm (0.33 in)11020 of 100 (Routine)
2020-09-28Glen Waverley (Golf Course)Record daily precipitation33.0 mm (1.3 in)17.8 mm (0.7 in)4143 of 100 (Notable)
2020-09-28Birregurra (Post Office)Record daily precipitation24.0 mm (0.9 in)7.0 mm (0.28 in)7720 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 117 records the event counts. The counts above use the full total.

Related Headlines

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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.