Cold outbreak in United States and Mexico, 10 September to 7 October 2020

Name: Cold outbreak in United States and Mexico, 10 September to 7 October 2020
Start: 2020-09-10
End: 2020-10-07
Location: United States, Mexico

Cold outbreak in United States and Mexico, 10 September to 7 October 2020: 1,037 records at 647 stations, peak on 20 September 2020. Closed.

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

Key Facts

Cold outbreak in United States and Mexico, 10 September to 7 October 2020 set or tied 1,037 station records at 647 stations.
It ran from 10 September 2020 to 7 October 2020 (28 days) and its peak day was 20 September 2020.
Status: closed.
Poplarville Exp STN set a daily record low maximum temperature of 18.9 C (66.0 F) on 21 September 2020.
The busiest day was 20 September 2020 with 173 records.
The oldest broken record in the ranked list had stood for 136 years.

Footprint

10 September to 7 October 2020

The area covered by Cold outbreak in United States and Mexico, 10 September to 7 October 2020 is outlined, with 17 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Cold outbreak in United States and Mexico, 10 September to 7 October 2020: stations that set records in the event
Station	Type	Value	Date
Poplarville Exp STN	Record low maximum temperature	18.9 C (66.0 F)	2020-09-21
Live Oak	Record low maximum temperature	22.8 C (73.0 F)	2020-09-20
Solomons	Record low minimum temperature	6.7 C (44.1 F)	2020-09-15
Franklin 3 NW	Record low maximum temperature	22.2 C (72.0 F)	2020-09-20
Biloxi	Record low maximum temperature	20.6 C (69.1 F)	2020-09-20
Beaumont City	Record low minimum temperature	6.7 C (44.1 F)	2020-09-29
Donaldsonville 4 SW	Record low maximum temperature	21.7 C (71.1 F)	2020-09-20
Ann Arbor U of Mich	Record low minimum temperature	-1.7 C (28.9 F)	2020-09-19
New Orleans Audubon	Record low maximum temperature	23.3 C (73.9 F)	2020-09-20
Niceville	Record low maximum temperature	19.4 C (66.9 F)	2020-09-21
Hot Springs 1 NNE	Record low maximum temperature	17.2 C (63.0 F)	2020-09-24
Dyersburg	Record low maximum temperature	17.8 C (64.0 F)	2020-09-25
Warsaw 2 NW	Record low maximum temperature	17.2 C (63.0 F)	2020-09-19
Fayetteville (Pwc)	Record low maximum temperature	17.2 C (63.0 F)	2020-09-20
Lafayette Rgnl AP	Record low maximum temperature	22.8 C (73.0 F)	2020-09-20
Cairo 3N	Record low minimum temperature	2.8 C (37.0 F)	2020-09-20
Middleboro	Record low minimum temperature	-1.7 C (28.9 F)	2020-09-21

Records per Day

Peak day 173

Records set or tied each day from 10 September 2020 to 7 October 2020. The most in one day was 173 on 20 September 2020.

Records per day during Cold outbreak in United States and Mexico, 10 September to 7 October 2020
Date	Records
2020-09-10	1
2020-09-11	1
2020-09-12	2
2020-09-13	4
2020-09-14	4
2020-09-15	13
2020-09-16	18
2020-09-17	25
2020-09-18	64
2020-09-19	138
2020-09-20	173
2020-09-21	132
2020-09-22	142
2020-09-23	40
2020-09-24	36
2020-09-25	24
2020-09-26	2
2020-09-27	2
2020-09-28	10
2020-09-29	26
2020-09-30	41
2020-10-01	18
2020-10-02	25
2020-10-03	36
2020-10-04	30
2020-10-05	20
2020-10-06	9
2020-10-07	1

Top Records by Margin

Margin over the record replaced

Top records of Cold outbreak in United States and Mexico, 10 September to 7 October 2020 ranked by margin
Niceville, 09-21	6.2 C (11.2 F)
Poplarville Exp STN, 09-21	5.0 C (9.0 F)
Solomons, 09-15	3.9 C (7.0 F)
Live Oak, 09-20	3.3 C (5.9 F)
Franklin 3 NW, 09-20	2.8 C (5.0 F)
Solomons, 09-21	2.8 C (5.0 F)
Hot Springs 1 NNE, 09-24	2.8 C (5.0 F)
Ann Arbor U of Mich, 09-19	2.8 C (5.0 F)
Dyersburg, 09-25	2.8 C (5.0 F)
Middleboro, 09-21	2.8 C (5.0 F)
Biloxi, 09-20	2.7 C (4.9 F)
Beaumont City, 09-29	2.2 C (4.0 F)
Donaldsonville 4 SW, 09-20	2.2 C (4.0 F)
Fayetteville (Pwc), 09-20	2.2 C (4.0 F)
Warsaw 2 NW, 09-19	2.2 C (4.0 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

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 Cold outbreak in United States and Mexico, 10 September to 7 October 2020
Margin (C)	Years the old record stood
5.0	94
3.3	107
2.8	120
3.9	124
2.7	120
2.2	78
2.2	112
2.8	122
2.8	129
6.2	51
2.8	104
1.6	120
2.8	111
1.7	119
2.8	121
2.2	119
2.2	119
1.6	121
1.1	77
1.1	119
1.1	102
2.2	122
2.2	102
2.2	98
0.6	78
4.4	24
1.6	136
2.2	91
1.1	102
1.6	100
1.7	106
2.2	125
1.7	104
1.7	125
0.6	107
2.8	91
1.1	104
1.1	108
1.1	104
1.1	119
1.1	119
0.6	78
1.1	119
1.1	104
1.2	123
0.6	102
1.1	123
3.3	78
1.1	83
2.7	67
0.6	124
0.6	119
0.6	118
0.6	100
0.6	116
0.6	102
2.2	91
0.6	106
0.6	119
0.6	118
0.6	116
0.6	120
2.2	92
0.5	100
1.7	84
0.6	104
3.9	68
4.5	69
0.5	125
2.8	88
0.6	99
1.1	96
0.5	120
1.6	91
1.7	92
3.9	69
0.6	96
2.8	85
2.2	78
1.7	87
1.1	91
1.1	91
1.2	91
1.1	91
0.6	97
5.0	59
1.1	91
1.1	91
3.3	69
2.3	77
0.6	91
2.2	73
0.6	91
0.5	91
2.7	78
0.6	91
0.5	91
0.6	91
0.6	91
2.2	73
0.6	91
6.7	58
1.1	85
3.3	69
2.2	77
3.9	51
0.5	91
1.1	85
3.3	64
1.1	80
4.4	59
0.6	85
1.7	79
1.1	81
0.6	81
1.1	77
2.2	71
0.6	83
0.6	57
5.5	39
1.7	50
2.8	58
0.6	83
1.7	77
1.1	79
1.7	77
0.5	82
1.6	78
3.3	51
2.7	73
1.2	83
1.7	78
1.7	68
1.7	59
0.6	77
0.6	81
1.7	68
0.6	82
0.6	82
1.1	77
1.1	77
1.1	75
0.6	50
2.8	65
2.2	67
1.1	78
1.0	81
2.2	72
0.6	82
1.1	58
0.6	73
2.2	61
0.5	71
2.2	71
1.7	69
1.6	68
0.5	81
1.5	72
2.8	51
2.2	63
5.0	39
1.7	58
0.6	72
0.6	68
0.6	73
1.1	65
2.8	54
1.1	65
0.6	75
3.4	40
0.6	75
3.4	37
2.2	58
2.2	64
1.6	65
3.3	58
2.1	64
1.7	67
1.6	51
0.6	64
1.6	55
2.8	37
2.8	55
0.5	64
1.1	61
2.2	51
3.3	40
1.6	58
3.3	39
2.3	61
2.2	61
1.6	64
2.2	61
2.7	51
1.0	70
1.0	70
0.6	64
1.6	58
3.3	38
3.3	39

Compared With Other Events

Station records per event

Station records in Cold outbreak in United States and Mexico, 10 September to 7 October 2020 compared with similar events
Cold outbreak in United States and Mexico, 6 February to 5 March 2021	12,118 records
Cold outbreak in United States and Mexico, 13 October to 5 November 2020	9,841 records
Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 2018	8,263 records
Cold outbreak in United States and Mexico, 3 to 23 January 2024	7,675 records
Cold outbreak in United States, 15 January to 10 February 2026	5,568 records
Cold outbreak in United States and Mexico, 10 September to 7 October 2020 (this event)	1,037 records

Every Record Set

20 of 1,037

Every record set or tied during Cold outbreak in United States and Mexico, 10 September to 7 October 2020, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2020-09-15	Solomons	Record low minimum temperature	6.7 C (44.1 F)	3.9 C (7.0 F)	124	50 of 100 (Notable)
2020-09-19	Ann Arbor U of Mich	Record low minimum temperature	-1.7 C (28.9 F)	2.8 C (5.0 F)	104	46 of 100 (Notable)
2020-09-19	Warsaw 2 NW	Record low maximum temperature	17.2 C (63.0 F)	2.2 C (4.0 F)	119	45 of 100 (Notable)
2020-09-19	Franklin 3 NW	Record low maximum temperature	22.8 C (73.0 F)	1.1 C (2.0 F)	119	44 of 100 (Notable)
2020-09-20	Live Oak	Record low maximum temperature	22.8 C (73.0 F)	3.3 C (5.9 F)	107	53 of 100 (Notable)
2020-09-20	Franklin 3 NW	Record low maximum temperature	22.2 C (72.0 F)	2.8 C (5.0 F)	120	50 of 100 (Notable)
2020-09-20	Biloxi	Record low maximum temperature	20.6 C (69.1 F)	2.7 C (4.9 F)	120	50 of 100 (Notable)
2020-09-20	Donaldsonville 4 SW	Record low maximum temperature	21.7 C (71.1 F)	2.2 C (4.0 F)	112	47 of 100 (Notable)
2020-09-20	New Orleans Audubon	Record low maximum temperature	23.3 C (73.9 F)	1.7 C (3.1 F)	119	46 of 100 (Notable)
2020-09-20	Fayetteville (Pwc)	Record low maximum temperature	17.2 C (63.0 F)	2.2 C (4.0 F)	119	45 of 100 (Notable)
2020-09-20	Lafayette Rgnl AP	Record low maximum temperature	22.8 C (73.0 F)	1.6 C (2.9 F)	121	45 of 100 (Notable)
2020-09-20	Cairo 3N	Record low minimum temperature	2.8 C (37.0 F)	1.1 C (2.0 F)	77	45 of 100 (Notable)
2020-09-21	Poplarville Exp STN	Record low maximum temperature	18.9 C (66.0 F)	5.0 C (9.0 F)	94	54 of 100 (Notable)
2020-09-21	Solomons	Record low maximum temperature	15.0 C (59.0 F)	2.8 C (5.0 F)	122	47 of 100 (Notable)
2020-09-21	Niceville	Record low maximum temperature	19.4 C (66.9 F)	6.2 C (11.2 F)	51	46 of 100 (Notable)
2020-09-21	Biloxi	Record low maximum temperature	20.6 C (69.1 F)	1.6 C (2.9 F)	120	46 of 100 (Notable)
2020-09-21	Middleboro	Record low minimum temperature	-1.7 C (28.9 F)	2.8 C (5.0 F)	121	45 of 100 (Notable)
2020-09-24	Hot Springs 1 NNE	Record low maximum temperature	17.2 C (63.0 F)	2.8 C (5.0 F)	129	46 of 100 (Notable)
2020-09-25	Dyersburg	Record low maximum temperature	17.8 C (64.0 F)	2.8 C (5.0 F)	111	46 of 100 (Notable)
2020-09-29	Beaumont City	Record low minimum temperature	6.7 C (44.1 F)	2.2 C (4.0 F)	78	50 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,037 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.

Margin (C)	Years the old record stood
5.0	94
3.3	107
2.8	120
3.9	124
2.7	120
2.2	78
2.2	112
2.8	122
2.8	129
6.2	51
2.8	104
1.6	120
2.8	111
1.7	119
2.8	121
2.2	119
2.2	119
1.6	121
1.1	77
1.1	119
1.1	102
2.2	122
2.2	102
2.2	98
0.6	78
4.4	24
1.6	136
2.2	91
1.1	102
1.6	100
1.7	106
2.2	125
1.7	104
1.7	125
0.6	107
2.8	91
1.1	104
1.1	108
1.1	104
1.1	119
1.1	119
0.6	78
1.1	119
1.1	104
1.2	123
0.6	102
1.1	123
3.3	78
1.1	83
2.7	67
0.6	124
0.6	119
0.6	118
0.6	100
0.6	116
0.6	102
2.2	91
0.6	106
0.6	119
0.6	118
0.6	116
0.6	120
2.2	92
0.5	100
1.7	84
0.6	104
3.9	68
4.5	69
0.5	125
2.8	88
0.6	99
1.1	96
0.5	120
1.6	91
1.7	92
3.9	69
0.6	96
2.8	85
2.2	78
1.7	87
1.1	91
1.1	91
1.2	91
1.1	91
0.6	97
5.0	59
1.1	91
1.1	91
3.3	69
2.3	77
0.6	91
2.2	73
0.6	91
0.5	91
2.7	78
0.6	91
0.5	91
0.6	91
0.6	91
2.2	73
0.6	91
6.7	58
1.1	85
3.3	69
2.2	77
3.9	51
0.5	91
1.1	85
3.3	64
1.1	80
4.4	59
0.6	85
1.7	79
1.1	81
0.6	81
1.1	77
2.2	71
0.6	83
0.6	57
5.5	39
1.7	50
2.8	58
0.6	83
1.7	77
1.1	79
1.7	77
0.5	82
1.6	78
3.3	51
2.7	73
1.2	83
1.7	78
1.7	68
1.7	59
0.6	77
0.6	81
1.7	68
0.6	82
0.6	82
1.1	77
1.1	77
1.1	75
0.6	50
2.8	65
2.2	67
1.1	78
1.0	81
2.2	72
0.6	82
1.1	58
0.6	73
2.2	61
0.5	71
2.2	71
1.7	69
1.6	68
0.5	81
1.5	72
2.8	51
2.2	63
5.0	39
1.7	58
0.6	72
0.6	68
0.6	73
1.1	65
2.8	54
1.1	65
0.6	75
3.4	40
0.6	75
3.4	37
2.2	58
2.2	64
1.6	65
3.3	58
2.1	64
1.7	67
1.6	51
0.6	64
1.6	55
2.8	37
2.8	55
0.5	64
1.1	61
2.2	51
3.3	40
1.6	58
3.3	39
2.3	61
2.2	61
1.6	64
2.2	61
2.7	51
1.0	70
1.0	70
0.6	64
1.6	58
3.3	38
3.3	39

Margin (C)	Years the old record stood
5.0	94
3.3	107
2.8	120
3.9	124
2.7	120
2.2	78
2.2	112
2.8	122
2.8	129
6.2	51
2.8	104
1.6	120
2.8	111
1.7	119
2.8	121
2.2	119
2.2	119
1.6	121
1.1	77
1.1	119
1.1	102
2.2	122
2.2	102
2.2	98
0.6	78
4.4	24
1.6	136
2.2	91
1.1	102
1.6	100
1.7	106
2.2	125
1.7	104
1.7	125
0.6	107
2.8	91
1.1	104
1.1	108
1.1	104
1.1	119
1.1	119
0.6	78
1.1	119
1.1	104
1.2	123
0.6	102
1.1	123
3.3	78
1.1	83
2.7	67
0.6	124
0.6	119
0.6	118
0.6	100
0.6	116
0.6	102
2.2	91
0.6	106
0.6	119
0.6	118
0.6	116
0.6	120
2.2	92
0.5	100
1.7	84
0.6	104
3.9	68
4.5	69
0.5	125
2.8	88
0.6	99
1.1	96
0.5	120
1.6	91
1.7	92
3.9	69
0.6	96
2.8	85
2.2	78
1.7	87
1.1	91
1.1	91
1.2	91
1.1	91
0.6	97
5.0	59
1.1	91
1.1	91
3.3	69
2.3	77
0.6	91
2.2	73
0.6	91
0.5	91
2.7	78
0.6	91
0.5	91
0.6	91
0.6	91
2.2	73
0.6	91
6.7	58
1.1	85
3.3	69
2.2	77
3.9	51
0.5	91
1.1	85
3.3	64
1.1	80
4.4	59
0.6	85
1.7	79
1.1	81
0.6	81
1.1	77
2.2	71
0.6	83
0.6	57
5.5	39
1.7	50
2.8	58
0.6	83
1.7	77
1.1	79
1.7	77
0.5	82
1.6	78
3.3	51
2.7	73
1.2	83
1.7	78
1.7	68
1.7	59
0.6	77
0.6	81
1.7	68
0.6	82
0.6	82
1.1	77
1.1	77
1.1	75
0.6	50
2.8	65
2.2	67
1.1	78
1.0	81
2.2	72
0.6	82
1.1	58
0.6	73
2.2	61
0.5	71
2.2	71
1.7	69
1.6	68
0.5	81
1.5	72
2.8	51
2.2	63
5.0	39
1.7	58
0.6	72
0.6	68
0.6	73
1.1	65
2.8	54
1.1	65
0.6	75
3.4	40
0.6	75
3.4	37
2.2	58
2.2	64
1.6	65
3.3	58
2.1	64
1.7	67
1.6	51
0.6	64
1.6	55
2.8	37
2.8	55
0.5	64
1.1	61
2.2	51
3.3	40
1.6	58
3.3	39
2.3	61
2.2	61
1.6	64
2.2	61
2.7	51
1.0	70
1.0	70
0.6	64
1.6	58
3.3	38
3.3	39