Extreme rain in Australia, 9 to 15 April 2021

Name: Extreme rain in Australia, 9 to 15 April 2021
Start: 2021-04-09
End: 2021-04-15
Location: Australia

Extreme rain in Australia, 9 to 15 April 2021: 256 records at 239 stations, peak on 12 April 2021. Closed.

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

Key Facts

Extreme rain in Australia, 9 to 15 April 2021 set or tied 256 station records at 239 stations.
It ran from 9 April 2021 to 15 April 2021 (7 days) and its peak day was 12 April 2021.
Status: closed.
Kojonup set a daily record precipitation of 60.2 mm (2.4 in) on 12 April 2021.
The busiest day was 12 April 2021 with 198 records.
The oldest broken record in the ranked list had stood for 120 years.

Footprint

9 to 15 April 2021

The area covered by Extreme rain in Australia, 9 to 15 April 2021 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, 9 to 15 April 2021: stations that set records in the event
Station	Type	Value	Date
Kojonup	Record daily precipitation	60.2 mm (2.4 in)	2021-04-12
Carnarvon Post Office	Record daily precipitation	48.6 mm (1.9 in)	2021-04-12
White Gums	Record daily precipitation	86.0 mm (3.4 in)	2021-04-12
Woodanilling	Record daily precipitation	44.6 mm (1.8 in)	2021-04-12
Mumby	Record daily precipitation	122.0 mm (4.8 in)	2021-04-12
Arthur River	Record daily precipitation	42.0 mm (1.7 in)	2021-04-12
Cherry Tree	Record daily precipitation	39.2 mm (1.5 in)	2021-04-12
Brunswick Junction	Record daily precipitation	67.6 mm (2.7 in)	2021-04-12
Graham Rock	Record daily precipitation	30.4 mm (1.2 in)	2021-04-14
Ghurka	Record daily precipitation	60.0 mm (2.4 in)	2021-04-12
Aldervale	Record daily precipitation	74.6 mm (2.9 in)	2021-04-12
Donnybrook	Record daily precipitation	63.0 mm (2.5 in)	2021-04-12
Wundi	Record daily precipitation	54.0 mm (2.1 in)	2021-04-12
Boscabel	Record daily precipitation	52.0 mm (2.0 in)	2021-04-12
Northampton	Record daily precipitation	52.0 mm (2.0 in)	2021-04-12
Wagin	Record daily precipitation	35.0 mm (1.4 in)	2021-04-12
Wokalup	Record daily precipitation	59.0 mm (2.3 in)	2021-04-12
Karara	Record daily precipitation	38.4 mm (1.5 in)	2021-04-12
Chamingup	Record daily precipitation	67.4 mm (2.7 in)	2021-04-12
Westbourne	Record daily precipitation	72.0 mm (2.8 in)	2021-04-12

Records per Day

Peak day 198

Records set or tied each day from 9 April 2021 to 15 April 2021. The most in one day was 198 on 12 April 2021.

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in Australia, 9 to 15 April 2021 ranked by margin
White Gums, 04-12	64.2 mm (2.5 in)
Westbourne, 04-12	48.0 mm (1.9 in)
Carnarvon Post Office, 04-12	47.8 mm (1.9 in)
Brunswick Junction, 04-12	42.2 mm (1.7 in)
Kojonup, 04-12	34.8 mm (1.4 in)
Mumby, 04-12	33.1 mm (1.3 in)
Karara, 04-12	32.8 mm (1.3 in)
Boscabel, 04-12	32.2 mm (1.3 in)
Wokalup, 04-12	32.0 mm (1.3 in)
Northampton, 04-12	30.2 mm (1.2 in)
Woodanilling, 04-12	27.8 mm (1.1 in)
Aldervale, 04-12	27.6 mm (1.1 in)
Ghurka, 04-12	26.0 mm (1.0 in)
Graham Rock, 04-14	24.8 mm (1.0 in)
Wundi, 04-12	24.4 mm (1.0 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

256 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, 9 to 15 April 2021
Margin (mm)	Years the old record stood
35	108
48	91
64	88
28	90
33	55
24	108
23	90
42	62
25	87
26	41
28	70
23	90
24	36
32	44
30	36
16	108
32	44
33	24
7	92
48	18
14	90
41	24
27	44
21	120
38	23
5	94
24	44
3	98
50	23
31	24
28	36
54	4
48	18
48	18
25	44
12	80
25	44
34	18
23	44
18	70
20	36
4	74
29	4
22	36
25	12
12	70
6	108
18	62
15	111
7	100
26	36
12	70
23	36
23	36
31	44
22	44
28	36
20	24
25	44
27	67
12	70
26	44
40	4
2	78
17	44
42	42
22	8
18	48
25	18
16	56
14	66
26	36
21	44
33	18
9	70
10	70
27	4
16	44
20	44
38	18
9	70
22	23
9	36
17	44
13	36
9	70
1	108
10	36
19	36
19	18
24	20
24	18
16	36
21	67
22	36
16	36
21	36
3	90
13	44
9	5
31	18
14	36
11	31
22	6
17	44
12	44
4	70
5	70
14	44
54	22
16	59
21	4
20	18
23	18
20	44
1	96
1	87
19	36
9	44
9	58
11	68
24	2
11	36
13	36
22	4
12	36
9	44
11	36
16	36
15	36
10	36
20	4
12	24
8	44
15	36
10	36
23	4
14	24
7	60
8	36
10	31
17	24
10	36
10	47
14	24
12	36
7	36
10	44
10	44
12	36
4	60
25	26
19	28
13	24
6	36
8	31
7	36
6	44
1	63
25	16
3	18
1	58
5	36
0	56
2	58
8	24
12	24
10	44
1	58
13	24
3	52
5	6
6	36
4	36
18	20
1	64
4	59
4	36
10	4
3	36
3	36
6	24
7	14
15	15
5	28
8	18
13	12
2	36
16	4
6	31
6	48
1	47
33	23
5	24
0	42
2	36
1	36
3	31
3	32
16	24

Compared With Other Events

Station records per event

Station records in Extreme rain in Australia, 9 to 15 April 2021 compared with similar events
Extreme rain in United States and Mexico, 23 February to 15 March 2019	2,223 records
Extreme rain in United States, 3 to 19 January 2024	2,133 records
Extreme rain in Australia, 7 to 26 March 2021	2,099 records
Extreme rain in United States and Mexico, 29 September to 19 October 2018	1,970 records
Extreme rain in United States, 19 December 2022 to 13 January 2023	1,941 records
Extreme rain in Australia, 9 to 15 April 2021 (this event)	256 records

Every Record Set

20 of 256

Every record set or tied during Extreme rain in Australia, 9 to 15 April 2021, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2021-04-12	Kojonup	Record daily precipitation	60.2 mm (2.4 in)	34.8 mm (1.4 in)	108	80 of 100 (Exceptional)
2021-04-12	Carnarvon Post Office	Record daily precipitation	48.6 mm (1.9 in)	47.8 mm (1.9 in)	91	77 of 100 (Major)
2021-04-12	White Gums	Record daily precipitation	86.0 mm (3.4 in)	64.2 mm (2.5 in)	88	76 of 100 (Major)
2021-04-12	Woodanilling	Record daily precipitation	44.6 mm (1.8 in)	27.8 mm (1.1 in)	90	75 of 100 (Major)
2021-04-12	Mumby	Record daily precipitation	122.0 mm (4.8 in)	33.1 mm (1.3 in)	55	72 of 100 (Major)
2021-04-12	Arthur River	Record daily precipitation	42.0 mm (1.7 in)	24.0 mm (0.9 in)	108	71 of 100 (Major)
2021-04-12	Cherry Tree	Record daily precipitation	39.2 mm (1.5 in)	22.7 mm (0.9 in)	90	70 of 100 (Major)
2021-04-12	Brunswick Junction	Record daily precipitation	67.6 mm (2.7 in)	42.2 mm (1.7 in)	62	68 of 100 (Major)
2021-04-12	Ghurka	Record daily precipitation	60.0 mm (2.4 in)	26.0 mm (1.0 in)	41	65 of 100 (Major)
2021-04-12	Aldervale	Record daily precipitation	74.6 mm (2.9 in)	27.6 mm (1.1 in)	70	65 of 100 (Major)
2021-04-12	Donnybrook	Record daily precipitation	63.0 mm (2.5 in)	23.4 mm (0.9 in)	90	64 of 100 (Major)
2021-04-12	Wundi	Record daily precipitation	54.0 mm (2.1 in)	24.4 mm (1.0 in)	36	63 of 100 (Major)
2021-04-12	Boscabel	Record daily precipitation	52.0 mm (2.0 in)	32.2 mm (1.3 in)	44	63 of 100 (Major)
2021-04-12	Northampton	Record daily precipitation	52.0 mm (2.0 in)	30.2 mm (1.2 in)	36	60 of 100 (Major)
2021-04-12	Wagin	Record daily precipitation	35.0 mm (1.4 in)	15.9 mm (0.6 in)	108	57 of 100 (Notable)
2021-04-12	Wokalup	Record daily precipitation	59.0 mm (2.3 in)	32.0 mm (1.3 in)	44	56 of 100 (Notable)
2021-04-12	Karara	Record daily precipitation	38.4 mm (1.5 in)	32.8 mm (1.3 in)	24	56 of 100 (Notable)
2021-04-12	Chamingup	Record daily precipitation	67.4 mm (2.7 in)	6.7 mm (0.26 in)	92	56 of 100 (Notable)
2021-04-12	Westbourne	Record daily precipitation	72.0 mm (2.8 in)	48.0 mm (1.9 in)	18	55 of 100 (Notable)
2021-04-14	Graham Rock	Record daily precipitation	30.4 mm (1.2 in)	24.8 mm (1.0 in)	87	67 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 256 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.

Date	Records
2021-04-09	2
2021-04-10	4
2021-04-11	15
2021-04-12	198
2021-04-13	16
2021-04-14	16
2021-04-15	5

Margin (mm)	Years the old record stood
35	108
48	91
64	88
28	90
33	55
24	108
23	90
42	62
25	87
26	41
28	70
23	90
24	36
32	44
30	36
16	108
32	44
33	24
7	92
48	18
14	90
41	24
27	44
21	120
38	23
5	94
24	44
3	98
50	23
31	24
28	36
54	4
48	18
48	18
25	44
12	80
25	44
34	18
23	44
18	70
20	36
4	74
29	4
22	36
25	12
12	70
6	108
18	62
15	111
7	100
26	36
12	70
23	36
23	36
31	44
22	44
28	36
20	24
25	44
27	67
12	70
26	44
40	4
2	78
17	44
42	42
22	8
18	48
25	18
16	56
14	66
26	36
21	44
33	18
9	70
10	70
27	4
16	44
20	44
38	18
9	70
22	23
9	36
17	44
13	36
9	70
1	108
10	36
19	36
19	18
24	20
24	18
16	36
21	67
22	36
16	36
21	36
3	90
13	44
9	5
31	18
14	36
11	31
22	6
17	44
12	44
4	70
5	70
14	44
54	22
16	59
21	4
20	18
23	18
20	44
1	96
1	87
19	36
9	44
9	58
11	68
24	2
11	36
13	36
22	4
12	36
9	44
11	36
16	36
15	36
10	36
20	4
12	24
8	44
15	36
10	36
23	4
14	24
7	60
8	36
10	31
17	24
10	36
10	47
14	24
12	36
7	36
10	44
10	44
12	36
4	60
25	26
19	28
13	24
6	36
8	31
7	36
6	44
1	63
25	16
3	18
1	58
5	36
0	56
2	58
8	24
12	24
10	44
1	58
13	24
3	52
5	6
6	36
4	36
18	20
1	64
4	59
4	36
10	4
3	36
3	36
6	24
7	14
15	15
5	28
8	18
13	12
2	36
16	4
6	31
6	48
1	47
33	23
5	24
0	42
2	36
1	36
3	31
3	32
16	24

Margin (mm)	Years the old record stood
35	108
48	91
64	88
28	90
33	55
24	108
23	90
42	62
25	87
26	41
28	70
23	90
24	36
32	44
30	36
16	108
32	44
33	24
7	92
48	18
14	90
41	24
27	44
21	120
38	23
5	94
24	44
3	98
50	23
31	24
28	36
54	4
48	18
48	18
25	44
12	80
25	44
34	18
23	44
18	70
20	36
4	74
29	4
22	36
25	12
12	70
6	108
18	62
15	111
7	100
26	36
12	70
23	36
23	36
31	44
22	44
28	36
20	24
25	44
27	67
12	70
26	44
40	4
2	78
17	44
42	42
22	8
18	48
25	18
16	56
14	66
26	36
21	44
33	18
9	70
10	70
27	4
16	44
20	44
38	18
9	70
22	23
9	36
17	44
13	36
9	70
1	108
10	36
19	36
19	18
24	20
24	18
16	36
21	67
22	36
16	36
21	36
3	90
13	44
9	5
31	18
14	36
11	31
22	6
17	44
12	44
4	70
5	70
14	44
54	22
16	59
21	4
20	18
23	18
20	44
1	96
1	87
19	36
9	44
9	58
11	68
24	2
11	36
13	36
22	4
12	36
9	44
11	36
16	36
15	36
10	36
20	4
12	24
8	44
15	36
10	36
23	4
14	24
7	60
8	36
10	31
17	24
10	36
10	47
14	24
12	36
7	36
10	44
10	44
12	36
4	60
25	26
19	28
13	24
6	36
8	31
7	36
6	44
1	63
25	16
3	18
1	58
5	36
0	56
2	58
8	24
12	24
10	44
1	58
13	24
3	52
5	6
6	36
4	36
18	20
1	64
4	59
4	36
10	4
3	36
3	36
6	24
7	14
15	15
5	28
8	18
13	12
2	36
16	4
6	31
6	48
1	47
33	23
5	24
0	42
2	36
1	36
3	31
3	32
16	24

Margin (mm)	Years the old record stood
35	108
48	91
64	88
28	90
33	55
24	108
23	90
42	62
25	87
26	41
28	70
23	90
24	36
32	44
30	36
16	108
32	44
33	24
7	92
48	18
14	90
41	24
27	44
21	120
38	23
5	94
24	44
3	98
50	23
31	24
28	36
54	4
48	18
48	18
25	44
12	80
25	44
34	18
23	44
18	70
20	36
4	74
29	4
22	36
25	12
12	70
6	108
18	62
15	111
7	100
26	36
12	70
23	36
23	36
31	44
22	44
28	36
20	24
25	44
27	67
12	70
26	44
40	4
2	78
17	44
42	42
22	8
18	48
25	18
16	56
14	66
26	36
21	44
33	18
9	70
10	70
27	4
16	44
20	44
38	18
9	70
22	23
9	36
17	44
13	36
9	70
1	108
10	36
19	36
19	18
24	20
24	18
16	36
21	67
22	36
16	36
21	36
3	90
13	44
9	5
31	18
14	36
11	31
22	6
17	44
12	44
4	70
5	70
14	44
54	22
16	59
21	4
20	18
23	18
20	44
1	96
1	87
19	36
9	44
9	58
11	68
24	2
11	36
13	36
22	4
12	36
9	44
11	36
16	36
15	36
10	36
20	4
12	24
8	44
15	36
10	36
23	4
14	24
7	60
8	36
10	31
17	24
10	36
10	47
14	24
12	36
7	36
10	44
10	44
12	36
4	60
25	26
19	28
13	24
6	36
8	31
7	36
6	44
1	63
25	16
3	18
1	58
5	36
0	56
2	58
8	24
12	24
10	44
1	58
13	24
3	52
5	6
6	36
4	36
18	20
1	64
4	59
4	36
10	4
3	36
3	36
6	24
7	14
15	15
5	28
8	18
13	12
2	36
16	4
6	31
6	48
1	47
33	23
5	24
0	42
2	36
1	36
3	31
3	32
16	24