Extreme rain in United States, 23 September to 10 October 2021

Name: Extreme rain in United States, 23 September to 10 October 2021
Start: 2021-09-23
End: 2021-10-10
Location: United States

Extreme rain in United States, 23 September to 10 October 2021: 623 records at 553 stations, peak on 1 October 2021. Closed.

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

Key Facts

Extreme rain in United States, 23 September to 10 October 2021 set or tied 623 station records at 553 stations.
It ran from 23 September 2021 to 10 October 2021 (18 days) and its peak day was 1 October 2021.
Status: closed.
Gothenburg set a daily record precipitation of 61.0 mm (2.4 in) on 30 September 2021.
The busiest day was 1 October 2021 with 123 records.
The oldest broken record in the ranked list had stood for 126 years.

Footprint

23 September to 10 October 2021

The area covered by Extreme rain in United States, 23 September to 10 October 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 United States, 23 September to 10 October 2021: stations that set records in the event
Station	Type	Value	Date
Gothenburg	Record daily precipitation	61.0 mm (2.4 in)	2021-09-30
Americus	Record daily precipitation	96.5 mm (3.8 in)	2021-10-06
Monterey	Record daily precipitation	132.8 mm (5.2 in)	2021-10-07
Brownsville	Record daily precipitation	205.5 mm (8.1 in)	2021-10-01
Harlingen	Record daily precipitation	202.4 mm (8.0 in)	2021-10-02
Oakley 4W	Record daily precipitation	56.6 mm (2.2 in)	2021-09-30
Cliff 11 SE	Record daily precipitation	51.6 mm (2.0 in)	2021-09-25
Port Mansfield	Record daily precipitation	101.6 mm (4.0 in)	2021-10-02
Rockport	Record daily precipitation	111.8 mm (4.4 in)	2021-10-01
Mc Cook	Record daily precipitation	66.8 mm (2.6 in)	2021-09-30
Estherville 4E	Record daily precipitation	86.6 mm (3.4 in)	2021-10-01
Welder Wildlife Foundation	Record daily precipitation	121.2 mm (4.8 in)	2021-10-01
Mt Pleasant 1N	Record daily precipitation	117.9 mm (4.6 in)	2021-10-06
Raleigh AP	Record daily precipitation	126.0 mm (5.0 in)	2021-10-09
Cabot	Record daily precipitation	143.0 mm (5.6 in)	2021-10-03
Lake Mills Wwtp	Record daily precipitation	63.0 mm (2.5 in)	2021-10-04
Emerson	Record daily precipitation	83.8 mm (3.3 in)	2021-10-01
Gascon	Record daily precipitation	52.1 mm (2.1 in)	2021-10-01
Raymondville	Record daily precipitation	68.6 mm (2.7 in)	2021-10-02
Colorado Nm	Record daily precipitation	39.4 mm (1.6 in)	2021-09-29

Records per Day

Peak day 123

Records set or tied each day from 23 September 2021 to 10 October 2021. The most in one day was 123 on 1 October 2021.

Records per day during Extreme rain in United States, 23 September to 10 October 2021
Date	Records
2021-09-23	1
2021-09-24	3
2021-09-25	8
2021-09-26	6
2021-09-27	6
2021-09-28	16
2021-09-29	57
2021-09-30	118
2021-10-01	123
2021-10-02	77
2021-10-03	34
2021-10-04	34
2021-10-05	20
2021-10-06	44
2021-10-07	46
2021-10-08	15
2021-10-09	9
2021-10-10	6

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States, 23 September to 10 October 2021 ranked by margin
Brownsville, 10-01	143.5 mm (5.6 in)
Welder Wildlife Foundation, 10-01	104.4 mm (4.1 in)
Rockport, 10-01	102.4 mm (4.0 in)
Raleigh AP, 10-09	96.0 mm (3.8 in)
Harlingen, 10-02	84.0 mm (3.3 in)
Port Mansfield, 10-02	79.0 mm (3.1 in)
Mt Pleasant 1N, 10-06	77.8 mm (3.1 in)
Americus, 10-06	68.6 mm (2.7 in)
Mc Cook, 09-30	53.6 mm (2.1 in)
Emerson, 10-01	51.8 mm (2.0 in)
Raymondville, 10-02	45.7 mm (1.8 in)
Monterey, 10-07	41.4 mm (1.6 in)
Oakley 4W, 09-30	41.4 mm (1.6 in)
Gothenburg, 09-30	38.1 mm (1.5 in)
Gascon, 10-01	35.6 mm (1.4 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

500 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, 23 September to 10 October 2021
Margin (mm)	Years the old record stood
38	116
69	88
41	59
144	63
84	22
41	76
34	54
79	59
102	56
12	109
54	38
78	52
104	56
96	44
33	71
20	120
52	39
36	62
46	78
14	80
29	76
21	116
57	17
13	119
20	116
35	18
39	62
39	60
75	44
56	34
56	23
19	122
17	114
31	32
93	24
40	72
32	44
34	12
65	7
50	23
29	108
13	72
45	52
14	102
28	84
47	44
34	72
27	80
32	76
42	62
179	23
38	76
23	70
74	44
69	16
45	44
44	76
49	67
14	106
19	80
11	114
7	114
9	114
12	111
33	78
64	36
32	76
31	62
37	80
39	23
52	26
17	72
45	59
12	115
36	26
42	48
8	114
12	94
52	20
9	111
26	66
64	24
19	22
23	75
26	71
15	35
56	55
8	84
48	35
31	35
5	114
11	95
11	94
43	63
6	111
4	126
15	76
35	7
4	116
5	98
44	48
59	48
5	110
23	66
2	102
21	76
14	80
20	76
31	35
61	6
29	18
5	114
13	67
9	84
21	26
3	119
8	88
30	62
54	19
0	100
2	98
10	72
11	80
100	12
25	66
9	76
11	72
3	94
7	87
26	52
40	26
12	28
29	39
33	26
16	38
7	74
48	30
13	76
31	44
16	67
24	76
28	55
25	26
8	88
20	62
20	76
12	75
2	96
26	12
36	26
10	72
22	63
57	12
1	95
33	40
23	4
6	56
21	56
32	2
34	39
28	56
12	60
4	76
3	49
23	23
30	46
11	62
20	38
66	8
16	72
8	66
33	26
25	28
5	56
15	56
12	56
15	38
15	35
9	36
2	80
20	56
1	80
7	50
22	23
1	80
1	80
9	30
35	16
2	80
5	78
45	30
2	80
18	63
67	8
2	80
33	16
9	60
3	71
10	60
24	60

Compared With Other Events

Station records per event

Station records in Extreme rain in United States, 23 September to 10 October 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 United States, 23 September to 10 October 2021 (this event)	623 records

Every Record Set

20 of 623

Every record set or tied during Extreme rain in United States, 23 September to 10 October 2021, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2021-09-25	Cliff 11 SE	Record daily precipitation	51.6 mm (2.0 in)	34.3 mm (1.4 in)	54	63 of 100 (Major)
2021-09-29	Colorado Nm	Record daily precipitation	39.4 mm (1.6 in)	13.7 mm (0.5 in)	80	57 of 100 (Notable)
2021-09-30	Gothenburg	Record daily precipitation	61.0 mm (2.4 in)	38.1 mm (1.5 in)	116	78 of 100 (Major)
2021-09-30	Oakley 4W	Record daily precipitation	56.6 mm (2.2 in)	41.4 mm (1.6 in)	76	65 of 100 (Major)
2021-09-30	Mc Cook	Record daily precipitation	66.8 mm (2.6 in)	53.6 mm (2.1 in)	38	61 of 100 (Major)
2021-10-01	Brownsville	Record daily precipitation	205.5 mm (8.1 in)	143.5 mm (5.6 in)	63	68 of 100 (Major)
2021-10-01	Rockport	Record daily precipitation	111.8 mm (4.4 in)	102.4 mm (4.0 in)	56	62 of 100 (Major)
2021-10-01	Estherville 4E	Record daily precipitation	86.6 mm (3.4 in)	11.7 mm (0.5 in)	109	61 of 100 (Major)
2021-10-01	Welder Wildlife Foundation	Record daily precipitation	121.2 mm (4.8 in)	104.4 mm (4.1 in)	56	61 of 100 (Major)
2021-10-01	Emerson	Record daily precipitation	83.8 mm (3.3 in)	51.8 mm (2.0 in)	39	58 of 100 (Notable)
2021-10-01	Gascon	Record daily precipitation	52.1 mm (2.1 in)	35.6 mm (1.4 in)	62	58 of 100 (Notable)
2021-10-02	Harlingen	Record daily precipitation	202.4 mm (8.0 in)	84.0 mm (3.3 in)	22	66 of 100 (Major)
2021-10-02	Port Mansfield	Record daily precipitation	101.6 mm (4.0 in)	79.0 mm (3.1 in)	59	63 of 100 (Major)
2021-10-02	Raymondville	Record daily precipitation	68.6 mm (2.7 in)	45.7 mm (1.8 in)	78	58 of 100 (Notable)
2021-10-03	Cabot	Record daily precipitation	143.0 mm (5.6 in)	32.5 mm (1.3 in)	71	59 of 100 (Notable)
2021-10-04	Lake Mills Wwtp	Record daily precipitation	63.0 mm (2.5 in)	19.6 mm (0.8 in)	120	59 of 100 (Notable)
2021-10-06	Americus	Record daily precipitation	96.5 mm (3.8 in)	68.6 mm (2.7 in)	88	76 of 100 (Major)
2021-10-06	Mt Pleasant 1N	Record daily precipitation	117.9 mm (4.6 in)	77.8 mm (3.1 in)	52	61 of 100 (Major)
2021-10-07	Monterey	Record daily precipitation	132.8 mm (5.2 in)	41.4 mm (1.6 in)	59	69 of 100 (Major)
2021-10-09	Raleigh AP	Record daily precipitation	126.0 mm (5.0 in)	96.0 mm (3.8 in)	44	60 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 623 records the event counts. The counts above use the full total.

Related Headlines

Third party news, headline and link only

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.

Margin (mm)	Years the old record stood
38	116
69	88
41	59
144	63
84	22
41	76
34	54
79	59
102	56
12	109
54	38
78	52
104	56
96	44
33	71
20	120
52	39
36	62
46	78
14	80
29	76
21	116
57	17
13	119
20	116
35	18
39	62
39	60
75	44
56	34
56	23
19	122
17	114
31	32
93	24
40	72
32	44
34	12
65	7
50	23
29	108
13	72
45	52
14	102
28	84
47	44
34	72
27	80
32	76
42	62
179	23
38	76
23	70
74	44
69	16
45	44
44	76
49	67
14	106
19	80
11	114
7	114
9	114
12	111
33	78
64	36
32	76
31	62
37	80
39	23
52	26
17	72
45	59
12	115
36	26
42	48
8	114
12	94
52	20
9	111
26	66
64	24
19	22
23	75
26	71
15	35
56	55
8	84
48	35
31	35
5	114
11	95
11	94
43	63
6	111
4	126
15	76
35	7
4	116
5	98
44	48
59	48
5	110
23	66
2	102
21	76
14	80
20	76
31	35
61	6
29	18
5	114
13	67
9	84
21	26
3	119
8	88
30	62
54	19
0	100
2	98
10	72
11	80
100	12
25	66
9	76
11	72
3	94
7	87
26	52
40	26
12	28
29	39
33	26
16	38
7	74
48	30
13	76
31	44
16	67
24	76
28	55
25	26
8	88
20	62
20	76
12	75
2	96
26	12
36	26
10	72
22	63
57	12
1	95
33	40
23	4
6	56
21	56
32	2
34	39
28	56
12	60
4	76
3	49
23	23
30	46
11	62
20	38
66	8
16	72
8	66
33	26
25	28
5	56
15	56
12	56
15	38
15	35
9	36
2	80
20	56
1	80
7	50
22	23
1	80
1	80
9	30
35	16
2	80
5	78
45	30
2	80
18	63
67	8
2	80
33	16
9	60
3	71
10	60
24	60

Margin (mm)	Years the old record stood
38	116
69	88
41	59
144	63
84	22
41	76
34	54
79	59
102	56
12	109
54	38
78	52
104	56
96	44
33	71
20	120
52	39
36	62
46	78
14	80
29	76
21	116
57	17
13	119
20	116
35	18
39	62
39	60
75	44
56	34
56	23
19	122
17	114
31	32
93	24
40	72
32	44
34	12
65	7
50	23
29	108
13	72
45	52
14	102
28	84
47	44
34	72
27	80
32	76
42	62
179	23
38	76
23	70
74	44
69	16
45	44
44	76
49	67
14	106
19	80
11	114
7	114
9	114
12	111
33	78
64	36
32	76
31	62
37	80
39	23
52	26
17	72
45	59
12	115
36	26
42	48
8	114
12	94
52	20
9	111
26	66
64	24
19	22
23	75
26	71
15	35
56	55
8	84
48	35
31	35
5	114
11	95
11	94
43	63
6	111
4	126
15	76
35	7
4	116
5	98
44	48
59	48
5	110
23	66
2	102
21	76
14	80
20	76
31	35
61	6
29	18
5	114
13	67
9	84
21	26
3	119
8	88
30	62
54	19
0	100
2	98
10	72
11	80
100	12
25	66
9	76
11	72
3	94
7	87
26	52
40	26
12	28
29	39
33	26
16	38
7	74
48	30
13	76
31	44
16	67
24	76
28	55
25	26
8	88
20	62
20	76
12	75
2	96
26	12
36	26
10	72
22	63
57	12
1	95
33	40
23	4
6	56
21	56
32	2
34	39
28	56
12	60
4	76
3	49
23	23
30	46
11	62
20	38
66	8
16	72
8	66
33	26
25	28
5	56
15	56
12	56
15	38
15	35
9	36
2	80
20	56
1	80
7	50
22	23
1	80
1	80
9	30
35	16
2	80
5	78
45	30
2	80
18	63
67	8
2	80
33	16
9	60
3	71
10	60
24	60

Margin (mm)	Years the old record stood
38	116
69	88
41	59
144	63
84	22
41	76
34	54
79	59
102	56
12	109
54	38
78	52
104	56
96	44
33	71
20	120
52	39
36	62
46	78
14	80
29	76
21	116
57	17
13	119
20	116
35	18
39	62
39	60
75	44
56	34
56	23
19	122
17	114
31	32
93	24
40	72
32	44
34	12
65	7
50	23
29	108
13	72
45	52
14	102
28	84
47	44
34	72
27	80
32	76
42	62
179	23
38	76
23	70
74	44
69	16
45	44
44	76
49	67
14	106
19	80
11	114
7	114
9	114
12	111
33	78
64	36
32	76
31	62
37	80
39	23
52	26
17	72
45	59
12	115
36	26
42	48
8	114
12	94
52	20
9	111
26	66
64	24
19	22
23	75
26	71
15	35
56	55
8	84
48	35
31	35
5	114
11	95
11	94
43	63
6	111
4	126
15	76
35	7
4	116
5	98
44	48
59	48
5	110
23	66
2	102
21	76
14	80
20	76
31	35
61	6
29	18
5	114
13	67
9	84
21	26
3	119
8	88
30	62
54	19
0	100
2	98
10	72
11	80
100	12
25	66
9	76
11	72
3	94
7	87
26	52
40	26
12	28
29	39
33	26
16	38
7	74
48	30
13	76
31	44
16	67
24	76
28	55
25	26
8	88
20	62
20	76
12	75
2	96
26	12
36	26
10	72
22	63
57	12
1	95
33	40
23	4
6	56
21	56
32	2
34	39
28	56
12	60
4	76
3	49
23	23
30	46
11	62
20	38
66	8
16	72
8	66
33	26
25	28
5	56
15	56
12	56
15	38
15	35
9	36
2	80
20	56
1	80
7	50
22	23
1	80
1	80
9	30
35	16
2	80
5	78
45	30
2	80
18	63
67	8
2	80
33	16
9	60
3	71
10	60
24	60