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Built 2026-10-14 (14 October 2026)

Heat wave in Australia, 30 March to 9 April 2021

Heat wave in Australia, 30 March to 9 April 2021: 102 records at 64 stations, peak on 3 April 2021. Closed.

Data as of . Last revised (2026-10-12).

Key Facts

  • Heat wave in Australia, 30 March to 9 April 2021 set or tied 102 station records at 64 stations.
  • It ran from 30 March 2021 to 9 April 2021 (11 days) and its peak day was 3 April 2021.
  • Status: closed.
  • Mount Gambier Post Office set a daily record high maximum temperature of 34.5 C (94.1 F) on 3 April 2021.
  • The busiest day was 3 April 2021 with 42 records.
  • The oldest broken record in the ranked list had stood for 98 years.

Footprint

30 March to 9 April 2021
Footprint of Heat wave in Australia, 30 March to 9 April 2021 The area covered by Heat wave in Australia, 30 March to 9 April 2021 is outlined, with 19 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Australia, 30 March to 9 April 2021 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Australia, 30 March to 9 April 2021: stations that set records in the event
StationTypeValueDate
Mount Gambier Post OfficeRecord high maximum temperature34.5 C (94.1 F)2021-04-03
Adelaide West TerraceRecord high maximum temperature33.7 C (92.7 F)2021-04-03
Mount WellingtonRecord high maximum temperature20.7 C (69.3 F)2021-04-03
Gabo Island LighthouseRecord high maximum temperature26.9 C (80.4 F)2021-04-04
Bicheno (Council Depot)Record high maximum temperature30.0 C (86.0 F)2021-04-03
East Sale ComparisonRecord high minimum temperature14.8 C (58.6 F)2021-04-06
Cape Bruny LighthouseRecord high maximum temperature28.5 C (83.3 F)2021-04-03
Thredbo VillageRecord high minimum temperature12.0 C (53.6 F)2021-04-04
Essendon AirportRecord high minimum temperature16.2 C (61.2 F)2021-04-04
Launceston AirportRecord high maximum temperature23.1 C (73.6 F)2021-04-04
Eddystone PointRecord high maximum temperature25.2 C (77.4 F)2021-04-03
Hobart (Ellerslie Road)Record high maximum temperature32.3 C (90.1 F)2021-04-03
Balranald (Rsl)Record high maximum temperature35.0 C (95.0 F)2021-04-04
Cape WilloughbyRecord high minimum temperature20.1 C (68.2 F)2021-04-03
Fingal (Legge Street)Record high maximum temperature29.0 C (84.2 F)2021-04-03
Scottsdale (West Minstone RoadRecord high maximum temperature24.8 C (76.6 F)2021-04-03
Orford (Aubin Court)Record high maximum temperature31.4 C (88.5 F)2021-04-03
Hobart AirportRecord high maximum temperature31.8 C (89.2 F)2021-04-03
Butlers GorgeRecord high maximum temperature24.9 C (76.8 F)2021-04-03

Records per Day

Peak day 42
Records per day during Heat wave in Australia, 30 March to 9 April 2021 Records set or tied each day from 30 March 2021 to 9 April 2021. The most in one day was 42 on 3 April 2021. 0 13 25 38 50 03-3004-0104-0204-0304-0404-0504-0604-0704-0804-09
Records set or tied each day from 30 March 2021 to 9 April 2021. The most in one day was 42 on 3 April 2021.
Records per day during Heat wave in Australia, 30 March to 9 April 2021
DateRecords
2021-03-301
2021-04-014
2021-04-028
2021-04-0342
2021-04-0416
2021-04-058
2021-04-0610
2021-04-078
2021-04-084
2021-04-091

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Australia, 30 March to 9 April 2021 ranked by margin
Mount Wellington, 04-035.1 C (9.2 F)
Mount Gambier Post Office, 04-034.3 C (7.7 F)
Fingal (Legge Street), 04-033.7 C (6.7 F)
Balranald (Rsl), 04-043.5 C (6.3 F)
Thredbo Village, 04-043.2 C (5.8 F)
Gabo Island Lighthouse, 04-043.1 C (5.6 F)
Bicheno (Council Depot), 04-032.2 C (4.0 F)
Cape Willoughby, 04-031.7 C (3.1 F)
Orford (Aubin Court), 04-031.4 C (2.5 F)
Hobart (Ellerslie Road), 04-031.3 C (2.3 F)
East Sale Comparison, 04-081.3 C (2.3 F)
Hobart Airport, 04-031.1 C (2.0 F)
Eddystone Point, 04-031.0 C (1.8 F)
Butlers Gorge, 04-031.0 C (1.8 F)
East Sale Comparison, 04-060.9 C (1.6 F)

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 Heat wave in Australia, 30 March to 9 April 2021 102 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 0.01.53.04.56.0 Margin (C) Years the old record stood
102 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 Heat wave in Australia, 30 March to 9 April 2021
Margin (C)Years the old record stood
4.398
0.896
5.160
3.146
0.964
2.250
3.248
0.560
0.364
0.535
3.544
1.050
1.37
1.740
3.734
1.340
0.950
1.416
1.116
1.048
2.035
1.244
1.020
4.719
0.640
2.035
0.940
2.035
2.028
0.940
2.228
2.88
1.81
0.37
0.728
2.916
0.612
1.520
2.019
0.235
1.222
2.030
1.320
1.528
2.728
1.628
1.828
1.828
0.37
1.030
0.827
1.819
0.820
1.228
0.631
0.235
0.527
0.428
0.420
0.228
1.012
0.128
0.412
1.519
0.128
0.611
1.011
0.34
0.915
0.623
0.420
0.93
0.716
1.73
0.123
0.220
0.216
0.616
0.219
0.28
0.416
0.56
0.54
0.512
0.512
1.43
0.58
0.211
0.94
0.68
0.48
0.58
0.111
0.10
0.18
0.38
0.18
0.28
0.73
0.26
0.12
0.23

Compared With Other Events

Station records per event
Station records in Heat wave in Australia, 30 March to 9 April 2021 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 20249,869 records
Heat wave in United States, 28 January to 24 February 20266,528 records
Heat wave in United States and Mexico, 24 May to 19 June 20205,047 records
Heat wave in United States and Mexico, 26 March to 17 April 20213,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 20223,626 records
Heat wave in Australia, 30 March to 9 April 2021 (this event)102 records

Every Record Set

20 of 102
Every record set or tied during Heat wave in Australia, 30 March to 9 April 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-04-03Mount Gambier Post OfficeRecord high maximum temperature34.5 C (94.1 F)4.3 C (7.7 F)9849 of 100 (Notable)
2021-04-03Adelaide West TerraceRecord high maximum temperature33.7 C (92.7 F)0.8 C (1.4 F)9639 of 100 (Notable)
2021-04-03Mount WellingtonRecord high maximum temperature20.7 C (69.3 F)5.1 C (9.2 F)6036 of 100 (Notable)
2021-04-03Bicheno (Council Depot)Record high maximum temperature30.0 C (86.0 F)2.2 C (4.0 F)5028 of 100 (Routine)
2021-04-03Cape Bruny LighthouseRecord high maximum temperature28.5 C (83.3 F)0.5 C (0.9 F)3527 of 100 (Routine)
2021-04-03Eddystone PointRecord high maximum temperature25.2 C (77.4 F)1.0 C (1.8 F)5025 of 100 (Routine)
2021-04-03Hobart (Ellerslie Road)Record high maximum temperature32.3 C (90.1 F)1.3 C (2.3 F)725 of 100 (Routine)
2021-04-03Cape WilloughbyRecord high minimum temperature20.1 C (68.2 F)1.7 C (3.1 F)4024 of 100 (Routine)
2021-04-03Fingal (Legge Street)Record high maximum temperature29.0 C (84.2 F)3.7 C (6.7 F)3424 of 100 (Routine)
2021-04-03Scottsdale (West Minstone RoadRecord high maximum temperature24.8 C (76.6 F)0.9 C (1.6 F)5023 of 100 (Routine)
2021-04-03Orford (Aubin Court)Record high maximum temperature31.4 C (88.5 F)1.4 C (2.5 F)1623 of 100 (Routine)
2021-04-03Hobart AirportRecord high maximum temperature31.8 C (89.2 F)1.1 C (2.0 F)1623 of 100 (Routine)
2021-04-03Butlers GorgeRecord high maximum temperature24.9 C (76.8 F)1.0 C (1.8 F)4822 of 100 (Routine)
2021-04-04Gabo Island LighthouseRecord high maximum temperature26.9 C (80.4 F)3.1 C (5.6 F)4632 of 100 (Routine)
2021-04-04Thredbo VillageRecord high minimum temperature12.0 C (53.6 F)3.2 C (5.8 F)4827 of 100 (Routine)
2021-04-04Essendon AirportRecord high minimum temperature16.2 C (61.2 F)0.5 C (0.9 F)6027 of 100 (Routine)
2021-04-04Launceston AirportRecord high maximum temperature23.1 C (73.6 F)0.3 C (0.5 F)6427 of 100 (Routine)
2021-04-04Balranald (Rsl)Record high maximum temperature35.0 C (95.0 F)3.5 C (6.3 F)4425 of 100 (Routine)
2021-04-06East Sale ComparisonRecord high minimum temperature14.8 C (58.6 F)0.9 C (1.6 F)6428 of 100 (Routine)
2021-04-08East Sale ComparisonRecord high minimum temperature13.3 C (55.9 F)1.3 C (2.3 F)4023 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 102 records the event counts. The counts above use the full total.

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 2026-10-12. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.