Extreme rain in United States, 17 July to 9 August 2020

Name: Extreme rain in United States, 17 July to 9 August 2020
Start: 2020-07-17
End: 2020-08-09
Location: United States

Extreme rain in United States, 17 July to 9 August 2020: 1,187 records at 1,002 stations, peak on 31 July 2020. Closed.

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

Key Facts

Extreme rain in United States, 17 July to 9 August 2020 set or tied 1,187 station records at 1,002 stations.
It ran from 17 July 2020 to 9 August 2020 (24 days) and its peak day was 31 July 2020.
Status: closed.
Hebron set a daily record precipitation of 126.5 mm (5.0 in) on 27 July 2020.
The busiest day was 31 July 2020 with 117 records.
The oldest broken record in the ranked list had stood for 126 years.

Footprint

17 July to 9 August 2020

The area covered by Extreme rain in United States, 17 July to 9 August 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 United States, 17 July to 9 August 2020: stations that set records in the event
Station	Type	Value	Date
Hebron	Record daily precipitation	126.5 mm (5.0 in)	2020-07-27
Port Jervis	Record daily precipitation	115.6 mm (4.6 in)	2020-08-05
Phoenixville 1 E	Record daily precipitation	142.2 mm (5.6 in)	2020-08-04
Hooker	Record daily precipitation	72.9 mm (2.9 in)	2020-07-27
Mechanicsville 5 NE	Record daily precipitation	163.1 mm (6.4 in)	2020-08-04
St Peter	Record daily precipitation	165.6 mm (6.5 in)	2020-07-26
E Stroudsburg	Record daily precipitation	124.5 mm (4.9 in)	2020-08-04
Reading Wb City	Record daily precipitation	99.3 mm (3.9 in)	2020-08-04
Montezuma 2 NW	Record daily precipitation	109.2 mm (4.3 in)	2020-07-30
Ashland	Record daily precipitation	104.1 mm (4.1 in)	2020-08-04
Rio Grande City	Record daily precipitation	63.5 mm (2.5 in)	2020-07-27
Harlingen Rio Grande Vly Intl	Record daily precipitation	270.3 mm (10.6 in)	2020-07-26
Phila Intl AP	Record daily precipitation	105.7 mm (4.2 in)	2020-08-04
Whitehall	Record daily precipitation	88.9 mm (3.5 in)	2020-08-05
Stevensville 2SW	Record daily precipitation	137.7 mm (5.4 in)	2020-08-05
Antigo	Record daily precipitation	101.6 mm (4.0 in)	2020-07-26
Blue Rapids	Record daily precipitation	98.3 mm (3.9 in)	2020-07-27
Covert	Record daily precipitation	170.7 mm (6.7 in)	2020-07-27
Clay Ctr	Record daily precipitation	77.5 mm (3.1 in)	2020-07-31
Alcove Dam	Record daily precipitation	96.5 mm (3.8 in)	2020-08-05

Records per Day

Peak day 117

Records set or tied each day from 17 July 2020 to 9 August 2020. The most in one day was 117 on 31 July 2020.

Records per day during Extreme rain in United States, 17 July to 9 August 2020
Date	Records
2020-07-17	10
2020-07-18	23
2020-07-19	23
2020-07-20	34
2020-07-21	50
2020-07-22	53
2020-07-23	56
2020-07-24	61
2020-07-25	44
2020-07-26	71
2020-07-27	96
2020-07-28	67
2020-07-29	42
2020-07-30	84
2020-07-31	117
2020-08-01	68
2020-08-02	50
2020-08-03	32
2020-08-04	102
2020-08-05	55
2020-08-06	10
2020-08-07	24
2020-08-08	13
2020-08-09	2

Top Records by Margin

Margin over the record replaced

Top records of Extreme rain in United States, 17 July to 9 August 2020 ranked by margin
Stevensville 2SW, 08-05	111.5 mm (4.4 in)
Mechanicsville 5 NE, 08-04	107.0 mm (4.2 in)
Harlingen Rio Grande Vly Intl, 07-26	99.4 mm (3.9 in)
Port Jervis, 08-05	81.1 mm (3.2 in)
Hebron, 07-27	76.2 mm (3.0 in)
Alcove Dam, 08-05	75.7 mm (3.0 in)
E Stroudsburg, 08-04	73.7 mm (2.9 in)
Blue Rapids, 07-27	72.1 mm (2.8 in)
Phoenixville 1 E, 08-04	68.0 mm (2.7 in)
Phila Intl AP, 08-04	67.6 mm (2.7 in)
Whitehall, 08-05	55.1 mm (2.2 in)
Ashland, 08-04	53.3 mm (2.1 in)
Montezuma 2 NW, 07-30	52.3 mm (2.1 in)
Reading Wb City, 08-04	49.8 mm (2.0 in)
Rio Grande City, 07-27	48.3 mm (1.9 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, 17 July to 9 August 2020
Margin (mm)	Years the old record stood
76	118
81	117
68	105
107	91
48	114
45	77
74	81
50	105
52	102
53	105
48	104
99	13
68	71
55	67
112	60
72	55
31	70
33	101
41	111
76	61
31	108
79	60
34	72
14	126
51	49
66	61
79	51
80	51
57	64
29	121
32	62
51	60
42	109
59	54
91	55
98	51
37	93
79	46
78	42
12	84
71	33
47	51
27	92
67	29
59	51
58	62
45	48
65	49
22	103
51	47
59	20
27	65
30	42
23	51
10	64
38	66
41	58
39	62
43	52
28	67
35	77
18	102
24	115
73	45
24	74
28	67
76	36
28	74
53	43
15	119
21	87
32	72
160	19
30	56
20	46
21	47
18	123
19	115
48	53
45	10
75	27
43	42
46	42
38	20
43	45
19	94
7	88
42	59
63	36
44	56
37	10
21	119
42	44
70	19
22	72
1	102
30	62
27	82
74	19
18	101
70	47
14	65
21	100
23	23
18	94
36	62
32	62
33	55
93	17
37	31
38	31
15	43
33	37
21	75
8	108
21	82
35	69
28	53
35	47
43	47
62	18
81	13
20	58
46	2
42	28
38	55
9	121
22	59
58	2
34	35
42	56
39	72
12	96
9	118
34	32
37	10
31	47
8	51
19	51
5	120
12	114
16	82
19	86
34	47
7	119
18	31
66	5
15	88
33	40
30	10
18	7
30	53
52	15
34	62
23	89
39	52
11	92
4	107
7	115
13	31
40	39
34	46
16	72
26	55
37	53
54	43
22	75
4	98
7	72
6	105
46	41
11	86
53	2
9	94
15	89
55	20
32	44
42	25
37	51
25	69
2	105
7	83
14	79
58	2
4	104
21	66
29	53
61	13
29	42
6	105
78	3
19	18
45	34
20	61
58	10
3	117
42	27
43	16
18	36
27	72

Compared With Other Events

Station records per event

Station records in Extreme rain in United States, 17 July to 9 August 2020 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, 17 July to 9 August 2020 (this event)	1,187 records

Every Record Set

20 of 1,187

Every record set or tied during Extreme rain in United States, 17 July to 9 August 2020, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2020-07-26	St Peter	Record daily precipitation	165.6 mm (6.5 in)	45.2 mm (1.8 in)	77	74 of 100 (Major)
2020-07-26	Harlingen Rio Grande Vly Intl	Record daily precipitation	270.3 mm (10.6 in)	99.4 mm (3.9 in)	13	69 of 100 (Major)
2020-07-26	Antigo	Record daily precipitation	101.6 mm (4.0 in)	33.0 mm (1.3 in)	101	66 of 100 (Major)
2020-07-27	Hebron	Record daily precipitation	126.5 mm (5.0 in)	76.2 mm (3.0 in)	118	80 of 100 (Exceptional)
2020-07-27	Hooker	Record daily precipitation	72.9 mm (2.9 in)	47.5 mm (1.9 in)	114	76 of 100 (Major)
2020-07-27	Rio Grande City	Record daily precipitation	63.5 mm (2.5 in)	48.3 mm (1.9 in)	104	72 of 100 (Major)
2020-07-27	Blue Rapids	Record daily precipitation	98.3 mm (3.9 in)	72.1 mm (2.8 in)	55	66 of 100 (Major)
2020-07-27	Covert	Record daily precipitation	170.7 mm (6.7 in)	31.0 mm (1.2 in)	70	66 of 100 (Major)
2020-07-30	Montezuma 2 NW	Record daily precipitation	109.2 mm (4.3 in)	52.3 mm (2.1 in)	102	73 of 100 (Major)
2020-07-31	Clay Ctr	Record daily precipitation	77.5 mm (3.1 in)	40.7 mm (1.6 in)	111	65 of 100 (Major)
2020-08-04	Phoenixville 1 E	Record daily precipitation	142.2 mm (5.6 in)	68.0 mm (2.7 in)	105	79 of 100 (Major)
2020-08-04	Mechanicsville 5 NE	Record daily precipitation	163.1 mm (6.4 in)	107.0 mm (4.2 in)	91	76 of 100 (Major)
2020-08-04	E Stroudsburg	Record daily precipitation	124.5 mm (4.9 in)	73.7 mm (2.9 in)	81	74 of 100 (Major)
2020-08-04	Reading Wb City	Record daily precipitation	99.3 mm (3.9 in)	49.8 mm (2.0 in)	105	74 of 100 (Major)
2020-08-04	Ashland	Record daily precipitation	104.1 mm (4.1 in)	53.3 mm (2.1 in)	105	73 of 100 (Major)
2020-08-04	Phila Intl AP	Record daily precipitation	105.7 mm (4.2 in)	67.6 mm (2.7 in)	71	69 of 100 (Major)
2020-08-05	Port Jervis	Record daily precipitation	115.6 mm (4.6 in)	81.1 mm (3.2 in)	117	80 of 100 (Exceptional)
2020-08-05	Whitehall	Record daily precipitation	88.9 mm (3.5 in)	55.1 mm (2.2 in)	67	68 of 100 (Major)
2020-08-05	Stevensville 2SW	Record daily precipitation	137.7 mm (5.4 in)	111.5 mm (4.4 in)	60	67 of 100 (Major)
2020-08-05	Alcove Dam	Record daily precipitation	96.5 mm (3.8 in)	75.7 mm (3.0 in)	61	65 of 100 (Major)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,187 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
76	118
81	117
68	105
107	91
48	114
45	77
74	81
50	105
52	102
53	105
48	104
99	13
68	71
55	67
112	60
72	55
31	70
33	101
41	111
76	61
31	108
79	60
34	72
14	126
51	49
66	61
79	51
80	51
57	64
29	121
32	62
51	60
42	109
59	54
91	55
98	51
37	93
79	46
78	42
12	84
71	33
47	51
27	92
67	29
59	51
58	62
45	48
65	49
22	103
51	47
59	20
27	65
30	42
23	51
10	64
38	66
41	58
39	62
43	52
28	67
35	77
18	102
24	115
73	45
24	74
28	67
76	36
28	74
53	43
15	119
21	87
32	72
160	19
30	56
20	46
21	47
18	123
19	115
48	53
45	10
75	27
43	42
46	42
38	20
43	45
19	94
7	88
42	59
63	36
44	56
37	10
21	119
42	44
70	19
22	72
1	102
30	62
27	82
74	19
18	101
70	47
14	65
21	100
23	23
18	94
36	62
32	62
33	55
93	17
37	31
38	31
15	43
33	37
21	75
8	108
21	82
35	69
28	53
35	47
43	47
62	18
81	13
20	58
46	2
42	28
38	55
9	121
22	59
58	2
34	35
42	56
39	72
12	96
9	118
34	32
37	10
31	47
8	51
19	51
5	120
12	114
16	82
19	86
34	47
7	119
18	31
66	5
15	88
33	40
30	10
18	7
30	53
52	15
34	62
23	89
39	52
11	92
4	107
7	115
13	31
40	39
34	46
16	72
26	55
37	53
54	43
22	75
4	98
7	72
6	105
46	41
11	86
53	2
9	94
15	89
55	20
32	44
42	25
37	51
25	69
2	105
7	83
14	79
58	2
4	104
21	66
29	53
61	13
29	42
6	105
78	3
19	18
45	34
20	61
58	10
3	117
42	27
43	16
18	36
27	72

Margin (mm)	Years the old record stood
76	118
81	117
68	105
107	91
48	114
45	77
74	81
50	105
52	102
53	105
48	104
99	13
68	71
55	67
112	60
72	55
31	70
33	101
41	111
76	61
31	108
79	60
34	72
14	126
51	49
66	61
79	51
80	51
57	64
29	121
32	62
51	60
42	109
59	54
91	55
98	51
37	93
79	46
78	42
12	84
71	33
47	51
27	92
67	29
59	51
58	62
45	48
65	49
22	103
51	47
59	20
27	65
30	42
23	51
10	64
38	66
41	58
39	62
43	52
28	67
35	77
18	102
24	115
73	45
24	74
28	67
76	36
28	74
53	43
15	119
21	87
32	72
160	19
30	56
20	46
21	47
18	123
19	115
48	53
45	10
75	27
43	42
46	42
38	20
43	45
19	94
7	88
42	59
63	36
44	56
37	10
21	119
42	44
70	19
22	72
1	102
30	62
27	82
74	19
18	101
70	47
14	65
21	100
23	23
18	94
36	62
32	62
33	55
93	17
37	31
38	31
15	43
33	37
21	75
8	108
21	82
35	69
28	53
35	47
43	47
62	18
81	13
20	58
46	2
42	28
38	55
9	121
22	59
58	2
34	35
42	56
39	72
12	96
9	118
34	32
37	10
31	47
8	51
19	51
5	120
12	114
16	82
19	86
34	47
7	119
18	31
66	5
15	88
33	40
30	10
18	7
30	53
52	15
34	62
23	89
39	52
11	92
4	107
7	115
13	31
40	39
34	46
16	72
26	55
37	53
54	43
22	75
4	98
7	72
6	105
46	41
11	86
53	2
9	94
15	89
55	20
32	44
42	25
37	51
25	69
2	105
7	83
14	79
58	2
4	104
21	66
29	53
61	13
29	42
6	105
78	3
19	18
45	34
20	61
58	10
3	117
42	27
43	16
18	36
27	72

Margin (mm)	Years the old record stood
76	118
81	117
68	105
107	91
48	114
45	77
74	81
50	105
52	102
53	105
48	104
99	13
68	71
55	67
112	60
72	55
31	70
33	101
41	111
76	61
31	108
79	60
34	72
14	126
51	49
66	61
79	51
80	51
57	64
29	121
32	62
51	60
42	109
59	54
91	55
98	51
37	93
79	46
78	42
12	84
71	33
47	51
27	92
67	29
59	51
58	62
45	48
65	49
22	103
51	47
59	20
27	65
30	42
23	51
10	64
38	66
41	58
39	62
43	52
28	67
35	77
18	102
24	115
73	45
24	74
28	67
76	36
28	74
53	43
15	119
21	87
32	72
160	19
30	56
20	46
21	47
18	123
19	115
48	53
45	10
75	27
43	42
46	42
38	20
43	45
19	94
7	88
42	59
63	36
44	56
37	10
21	119
42	44
70	19
22	72
1	102
30	62
27	82
74	19
18	101
70	47
14	65
21	100
23	23
18	94
36	62
32	62
33	55
93	17
37	31
38	31
15	43
33	37
21	75
8	108
21	82
35	69
28	53
35	47
43	47
62	18
81	13
20	58
46	2
42	28
38	55
9	121
22	59
58	2
34	35
42	56
39	72
12	96
9	118
34	32
37	10
31	47
8	51
19	51
5	120
12	114
16	82
19	86
34	47
7	119
18	31
66	5
15	88
33	40
30	10
18	7
30	53
52	15
34	62
23	89
39	52
11	92
4	107
7	115
13	31
40	39
34	46
16	72
26	55
37	53
54	43
22	75
4	98
7	72
6	105
46	41
11	86
53	2
9	94
15	89
55	20
32	44
42	25
37	51
25	69
2	105
7	83
14	79
58	2
4	104
21	66
29	53
61	13
29	42
6	105
78	3
19	18
45	34
20	61
58	10
3	117
42	27
43	16
18	36
27	72