Heat wave in United States and Mexico, 14 October to 9 November 2018

Name: Heat wave in United States and Mexico, 14 October to 9 November 2018
Start: 2018-10-14
End: 2018-11-09
Location: United States, Mexico

Heat wave in United States and Mexico, 14 October to 9 November 2018: 810 records at 482 stations, peak on 2 November 2018. Closed.

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

Key Facts

Heat wave in United States and Mexico, 14 October to 9 November 2018 set or tied 810 station records at 482 stations.
It ran from 14 October 2018 to 9 November 2018 (27 days) and its peak day was 2 November 2018.
Status: closed.
Newman set a monthly record high maximum temperature of 35.0 C (95.0 F) on 6 November 2018.
The busiest day was 2 November 2018 with 104 records.
The oldest broken record in the ranked list had stood for 120 years.

Footprint

14 October to 9 November 2018

The area covered by Heat wave in United States and Mexico, 14 October to 9 November 2018 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in United States and Mexico, 14 October to 9 November 2018: stations that set records in the event
Station	Type	Value	Date
Newman	Record high maximum temperature	35.0 C (95.0 F)	2018-11-06
Fairmont	Record high minimum temperature	18.3 C (64.9 F)	2018-11-05
Dulce	Record high minimum temperature	7.2 C (45.0 F)	2018-10-24
Pomeroy	Record high minimum temperature	11.7 C (53.1 F)	2018-11-01
Cascade Locks	Record high minimum temperature	12.2 C (54.0 F)	2018-11-02
Shoshone 1 WNW	Record high minimum temperature	10.6 C (51.1 F)	2018-10-22
Clearbrook	Record high minimum temperature	12.2 C (54.0 F)	2018-11-02
Mojave	Record high maximum temperature	31.7 C (89.1 F)	2018-11-08
Salem AP (McNary Field)	Record high minimum temperature	12.2 C (54.0 F)	2018-10-27
Adel	Record high minimum temperature	7.2 C (45.0 F)	2018-10-26
Heron 2 NW	Record high minimum temperature	7.2 C (45.0 F)	2018-10-26
Falls City 2 SSW	Record high minimum temperature	11.7 C (53.1 F)	2018-11-02
Bishop AP	Record high minimum temperature	8.3 C (46.9 F)	2018-11-03
Council	Record high minimum temperature	9.4 C (48.9 F)	2018-10-26
McCall	Record high minimum temperature	7.8 C (46.0 F)	2018-10-27
Aspendell	Record high maximum temperature	19.4 C (66.9 F)	2018-11-04
Salmon AP	Record high minimum temperature	3.3 C (37.9 F)	2018-11-04
Santa Barbara	Record high minimum temperature	15.0 C (59.0 F)	2018-11-06
Chula Vista	Record high minimum temperature	17.8 C (64.0 F)	2018-11-08

Records per Day

Peak day 104

Records set or tied each day from 14 October 2018 to 9 November 2018. The most in one day was 104 on 2 November 2018.

Records per day during Heat wave in United States and Mexico, 14 October to 9 November 2018
Date	Records
2018-10-14	1
2018-10-15	3
2018-10-16	10
2018-10-17	22
2018-10-18	17
2018-10-19	52
2018-10-20	67
2018-10-21	27
2018-10-22	11
2018-10-23	34
2018-10-24	36
2018-10-25	15
2018-10-26	45
2018-10-27	72
2018-10-28	42
2018-10-29	16
2018-10-30	12
2018-10-31	8
2018-11-01	100
2018-11-02	104
2018-11-03	41
2018-11-04	30
2018-11-05	23
2018-11-06	9
2018-11-07	4
2018-11-08	6
2018-11-09	3

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in United States and Mexico, 14 October to 9 November 2018 ranked by margin
Fairmont, 11-05	4.4 C (7.9 F)
Pomeroy, 11-01	3.4 C (6.1 F)
Newman, 11-06	2.8 C (5.0 F)
Dulce, 10-24	2.8 C (5.0 F)
Shoshone 1 WNW, 10-22	2.3 C (4.1 F)
Mojave, 11-08	2.3 C (4.1 F)
Cascade Locks, 11-02	2.2 C (4.0 F)
Clearbrook, 11-02	2.2 C (4.0 F)
Aspendell, 11-04	2.2 C (4.0 F)
Pomeroy, 11-02	1.7 C (3.1 F)
Chula Vista, 11-08	1.7 C (3.1 F)
McCall, 10-27	1.7 C (3.1 F)
Adel, 10-26	1.6 C (2.9 F)
Council, 10-26	1.6 C (2.9 F)
Salem AP (McNary Field), 10-27	1.1 C (2.0 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 Heat wave in United States and Mexico, 14 October to 9 November 2018
Margin (C)	Years the old record stood
2.8	90
4.4	92
2.8	111
2.2	109
3.4	115
2.3	103
2.2	115
2.3	109
1.7	115
1.1	112
1.6	101
1.1	101
1.1	109
1.1	120
2.2	91
1.7	87
0.6	119
1.6	92
1.7	91
0.5	100
0.6	104
1.1	100
0.5	111
0.5	100
0.6	105
1.7	93
1.7	72
0.5	104
1.1	96
2.2	80
1.6	88
1.1	91
2.8	76
1.1	92
1.1	91
1.1	88
1.6	80
0.5	91
2.8	80
1.1	88
1.2	91
0.5	88
1.1	80
6.1	61
1.1	85
0.5	85
1.1	81
3.3	72
0.5	81
0.5	84
0.6	80
0.5	80
2.2	65
5.6	45
0.6	76
2.2	72
1.6	73
1.1	76
0.5	80
1.1	80
1.6	75
2.2	68
3.4	57
0.6	73
0.5	77
0.5	76
2.2	59
0.6	76
1.7	75
2.2	59
0.5	72
0.5	73
2.2	56
0.6	77
3.3	60
1.1	76
0.5	68
1.1	71
0.5	64
2.8	52
0.5	64
1.1	63
0.6	73
0.6	64
5.0	36
1.1	63
1.1	60
1.1	68
0.5	60
0.6	68
0.5	68
0.5	60
1.1	68
2.2	52
2.3	48
0.6	64
0.6	72
3.4	51
0.6	72
1.1	68
1.1	68
1.1	56
0.6	56
0.6	57
1.1	53
3.4	56
1.6	52
1.1	52
0.6	68
3.3	41
2.3	48
1.6	56
0.5	31
0.5	60
0.6	68
0.6	68
1.1	68
2.3	44
0.5	60
1.1	65
0.5	57
1.1	56
1.2	65
2.2	56
0.6	51
2.2	36
2.8	41
2.2	43
0.5	56
5.0	29
0.5	59
1.1	53
0.5	52
2.8	44
1.7	41
1.6	55
1.1	59
0.6	52
0.6	60
1.7	56
0.6	60
0.6	49
1.1	41
1.6	53
2.2	41
0.6	59
2.8	32
2.2	35
3.9	29
0.5	53
1.7	55
1.1	56
0.6	59
2.8	35
1.1	41
1.6	48
1.6	51
0.5	59
1.6	53
5.0	29
0.6	52
3.3	43
0.6	57
0.6	34
0.6	52
1.1	52
2.2	41
2.7	37
0.6	56
1.2	21
3.8	31
0.6	51
1.1	51
1.7	41
1.1	37
1.1	52
0.5	53
3.9	17
0.5	40
0.6	43
0.6	52
3.3	28
1.1	52
1.6	49
1.6	35
1.2	44
1.7	41
1.1	44
0.5	53
0.1	55
1.6	41
2.8	41
0.5	51
0.6	19
1.7	44
0.5	55
1.1	36
0.6	52
4.5	32
1.6	44

Compared With Other Events

Station records per event

Station records in Heat wave in United States and Mexico, 14 October to 9 November 2018 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 2024	9,869 records
Heat wave in United States, 28 January to 24 February 2026	6,528 records
Heat wave in United States and Mexico, 24 May to 19 June 2020	5,047 records
Heat wave in United States and Mexico, 26 March to 17 April 2021	3,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 2022	3,626 records
Heat wave in United States and Mexico, 14 October to 9 November 2018 (this event)	810 records

Every Record Set

20 of 810

Every record set or tied during Heat wave in United States and Mexico, 14 October to 9 November 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-10-22	Shoshone 1 WNW	Record high minimum temperature	10.6 C (51.1 F)	2.3 C (4.1 F)	103	45 of 100 (Notable)
2018-10-24	Dulce	Record high minimum temperature	7.2 C (45.0 F)	2.8 C (5.0 F)	111	46 of 100 (Notable)
2018-10-26	Adel	Record high minimum temperature	7.2 C (45.0 F)	1.6 C (2.9 F)	101	42 of 100 (Notable)
2018-10-26	Heron 2 NW	Record high minimum temperature	7.2 C (45.0 F)	1.1 C (2.0 F)	101	42 of 100 (Notable)
2018-10-26	Council	Record high minimum temperature	9.4 C (48.9 F)	1.6 C (2.9 F)	92	41 of 100 (Notable)
2018-10-27	Salem AP (McNary Field)	Record high minimum temperature	12.2 C (54.0 F)	1.1 C (2.0 F)	112	43 of 100 (Notable)
2018-10-27	McCall	Record high minimum temperature	7.8 C (46.0 F)	1.7 C (3.1 F)	91	41 of 100 (Notable)
2018-11-01	Pomeroy	Record high minimum temperature	11.7 C (53.1 F)	3.4 C (6.1 F)	115	46 of 100 (Notable)
2018-11-02	Cascade Locks	Record high minimum temperature	12.2 C (54.0 F)	2.2 C (4.0 F)	109	46 of 100 (Notable)
2018-11-02	Clearbrook	Record high minimum temperature	12.2 C (54.0 F)	2.2 C (4.0 F)	115	45 of 100 (Notable)
2018-11-02	Pomeroy	Record high minimum temperature	10.0 C (50.0 F)	1.7 C (3.1 F)	115	43 of 100 (Notable)
2018-11-02	Falls City 2 SSW	Record high minimum temperature	11.7 C (53.1 F)	1.1 C (2.0 F)	109	42 of 100 (Notable)
2018-11-03	Bishop AP	Record high minimum temperature	8.3 C (46.9 F)	1.1 C (2.0 F)	120	42 of 100 (Notable)
2018-11-04	Aspendell	Record high maximum temperature	19.4 C (66.9 F)	2.2 C (4.0 F)	91	41 of 100 (Notable)
2018-11-04	Salmon AP	Record high minimum temperature	3.3 C (37.9 F)	0.5 C (0.9 F)	100	41 of 100 (Notable)
2018-11-05	Fairmont	Record high minimum temperature	18.3 C (64.9 F)	4.4 C (7.9 F)	92	48 of 100 (Notable)
2018-11-06	Newman	Record high maximum temperature	35.0 C (95.0 F)	2.8 C (5.0 F)	90	53 of 100 (Notable)
2018-11-06	Santa Barbara	Record high minimum temperature	15.0 C (59.0 F)	0.6 C (1.1 F)	119	41 of 100 (Notable)
2018-11-08	Mojave	Record high maximum temperature	31.7 C (89.1 F)	2.3 C (4.1 F)	109	44 of 100 (Notable)
2018-11-08	Chula Vista	Record high minimum temperature	17.8 C (64.0 F)	1.7 C (3.1 F)	87	41 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 810 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 2026-10-17. 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
2.8	90
4.4	92
2.8	111
2.2	109
3.4	115
2.3	103
2.2	115
2.3	109
1.7	115
1.1	112
1.6	101
1.1	101
1.1	109
1.1	120
2.2	91
1.7	87
0.6	119
1.6	92
1.7	91
0.5	100
0.6	104
1.1	100
0.5	111
0.5	100
0.6	105
1.7	93
1.7	72
0.5	104
1.1	96
2.2	80
1.6	88
1.1	91
2.8	76
1.1	92
1.1	91
1.1	88
1.6	80
0.5	91
2.8	80
1.1	88
1.2	91
0.5	88
1.1	80
6.1	61
1.1	85
0.5	85
1.1	81
3.3	72
0.5	81
0.5	84
0.6	80
0.5	80
2.2	65
5.6	45
0.6	76
2.2	72
1.6	73
1.1	76
0.5	80
1.1	80
1.6	75
2.2	68
3.4	57
0.6	73
0.5	77
0.5	76
2.2	59
0.6	76
1.7	75
2.2	59
0.5	72
0.5	73
2.2	56
0.6	77
3.3	60
1.1	76
0.5	68
1.1	71
0.5	64
2.8	52
0.5	64
1.1	63
0.6	73
0.6	64
5.0	36
1.1	63
1.1	60
1.1	68
0.5	60
0.6	68
0.5	68
0.5	60
1.1	68
2.2	52
2.3	48
0.6	64
0.6	72
3.4	51
0.6	72
1.1	68
1.1	68
1.1	56
0.6	56
0.6	57
1.1	53
3.4	56
1.6	52
1.1	52
0.6	68
3.3	41
2.3	48
1.6	56
0.5	31
0.5	60
0.6	68
0.6	68
1.1	68
2.3	44
0.5	60
1.1	65
0.5	57
1.1	56
1.2	65
2.2	56
0.6	51
2.2	36
2.8	41
2.2	43
0.5	56
5.0	29
0.5	59
1.1	53
0.5	52
2.8	44
1.7	41
1.6	55
1.1	59
0.6	52
0.6	60
1.7	56
0.6	60
0.6	49
1.1	41
1.6	53
2.2	41
0.6	59
2.8	32
2.2	35
3.9	29
0.5	53
1.7	55
1.1	56
0.6	59
2.8	35
1.1	41
1.6	48
1.6	51
0.5	59
1.6	53
5.0	29
0.6	52
3.3	43
0.6	57
0.6	34
0.6	52
1.1	52
2.2	41
2.7	37
0.6	56
1.2	21
3.8	31
0.6	51
1.1	51
1.7	41
1.1	37
1.1	52
0.5	53
3.9	17
0.5	40
0.6	43
0.6	52
3.3	28
1.1	52
1.6	49
1.6	35
1.2	44
1.7	41
1.1	44
0.5	53
0.1	55
1.6	41
2.8	41
0.5	51
0.6	19
1.7	44
0.5	55
1.1	36
0.6	52
4.5	32
1.6	44

Margin (C)	Years the old record stood
2.8	90
4.4	92
2.8	111
2.2	109
3.4	115
2.3	103
2.2	115
2.3	109
1.7	115
1.1	112
1.6	101
1.1	101
1.1	109
1.1	120
2.2	91
1.7	87
0.6	119
1.6	92
1.7	91
0.5	100
0.6	104
1.1	100
0.5	111
0.5	100
0.6	105
1.7	93
1.7	72
0.5	104
1.1	96
2.2	80
1.6	88
1.1	91
2.8	76
1.1	92
1.1	91
1.1	88
1.6	80
0.5	91
2.8	80
1.1	88
1.2	91
0.5	88
1.1	80
6.1	61
1.1	85
0.5	85
1.1	81
3.3	72
0.5	81
0.5	84
0.6	80
0.5	80
2.2	65
5.6	45
0.6	76
2.2	72
1.6	73
1.1	76
0.5	80
1.1	80
1.6	75
2.2	68
3.4	57
0.6	73
0.5	77
0.5	76
2.2	59
0.6	76
1.7	75
2.2	59
0.5	72
0.5	73
2.2	56
0.6	77
3.3	60
1.1	76
0.5	68
1.1	71
0.5	64
2.8	52
0.5	64
1.1	63
0.6	73
0.6	64
5.0	36
1.1	63
1.1	60
1.1	68
0.5	60
0.6	68
0.5	68
0.5	60
1.1	68
2.2	52
2.3	48
0.6	64
0.6	72
3.4	51
0.6	72
1.1	68
1.1	68
1.1	56
0.6	56
0.6	57
1.1	53
3.4	56
1.6	52
1.1	52
0.6	68
3.3	41
2.3	48
1.6	56
0.5	31
0.5	60
0.6	68
0.6	68
1.1	68
2.3	44
0.5	60
1.1	65
0.5	57
1.1	56
1.2	65
2.2	56
0.6	51
2.2	36
2.8	41
2.2	43
0.5	56
5.0	29
0.5	59
1.1	53
0.5	52
2.8	44
1.7	41
1.6	55
1.1	59
0.6	52
0.6	60
1.7	56
0.6	60
0.6	49
1.1	41
1.6	53
2.2	41
0.6	59
2.8	32
2.2	35
3.9	29
0.5	53
1.7	55
1.1	56
0.6	59
2.8	35
1.1	41
1.6	48
1.6	51
0.5	59
1.6	53
5.0	29
0.6	52
3.3	43
0.6	57
0.6	34
0.6	52
1.1	52
2.2	41
2.7	37
0.6	56
1.2	21
3.8	31
0.6	51
1.1	51
1.7	41
1.1	37
1.1	52
0.5	53
3.9	17
0.5	40
0.6	43
0.6	52
3.3	28
1.1	52
1.6	49
1.6	35
1.2	44
1.7	41
1.1	44
0.5	53
0.1	55
1.6	41
2.8	41
0.5	51
0.6	19
1.7	44
0.5	55
1.1	36
0.6	52
4.5	32
1.6	44