Heat wave in United States and Mexico, 20 to 29 March 2018

Name: Heat wave in United States and Mexico, 20 to 29 March 2018
Start: 2018-03-20
End: 2018-03-29
Location: United States, Mexico

Heat wave in United States and Mexico, 20 to 29 March 2018: 455 records at 345 stations, peak on 23 March 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, 20 to 29 March 2018 set or tied 455 station records at 345 stations.
It ran from 20 March 2018 to 29 March 2018 (10 days) and its peak day was 23 March 2018.
Status: closed.
Mina set a daily record high minimum temperature of 11.7 C (53.1 F) on 22 March 2018.
The busiest day was 23 March 2018 with 120 records.
The oldest broken record in the ranked list had stood for 122 years.

Footprint

20 to 29 March 2018

The area covered by Heat wave in United States and Mexico, 20 to 29 March 2018 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in United States and Mexico, 20 to 29 March 2018: stations that set records in the event
Station	Type	Value	Date
Mina	Record high minimum temperature	11.7 C (53.1 F)	2018-03-22
Hermit 8 SE	Record high minimum temperature	1.1 C (34.0 F)	2018-03-23
Elsinore	Record high minimum temperature	14.4 C (57.9 F)	2018-03-22
Castle Rock	Record high minimum temperature	8.3 C (46.9 F)	2018-03-23
Rocky Ford 2 SE	Record high minimum temperature	10.6 C (51.1 F)	2018-03-23
Ashland	Record high maximum temperature	33.9 C (93.0 F)	2018-03-24
Hereford	Record high maximum temperature	31.7 C (89.1 F)	2018-03-24
Ft Davis	Record high minimum temperature	11.7 C (53.1 F)	2018-03-25
Lakin	Record high maximum temperature	33.3 C (91.9 F)	2018-03-24
Ulysses 3NE	Record high maximum temperature	32.8 C (91.0 F)	2018-03-24
Estancia 4N	Record high minimum temperature	5.0 C (41.0 F)	2018-03-25
Caballo Dam	Record high minimum temperature	13.9 C (57.0 F)	2018-03-26
Sugar Land	Record high minimum temperature	22.2 C (72.0 F)	2018-03-27
Ft Valley	Record high minimum temperature	2.8 C (37.0 F)	2018-03-22
Santa Cruz	Record high minimum temperature	12.8 C (55.0 F)	2018-03-22
Tombstone	Record high minimum temperature	13.9 C (57.0 F)	2018-03-23
Bosque del Apache	Record high maximum temperature	31.1 C (88.0 F)	2018-03-24
Hillsboro	Record high minimum temperature	20.0 C (68.0 F)	2018-03-25
Greenville Kgvl Radio	Record high minimum temperature	21.1 C (70.0 F)	2018-03-27
New Iberia AP - Acadiana Rgnl	Record high minimum temperature	21.7 C (71.1 F)	2018-03-28

Records per Day

Peak day 120

Records set or tied each day from 20 March 2018 to 29 March 2018. The most in one day was 120 on 23 March 2018.

Records per day during Heat wave in United States and Mexico, 20 to 29 March 2018
Date	Records
2018-03-20	2
2018-03-21	12
2018-03-22	97
2018-03-23	120
2018-03-24	68
2018-03-25	48
2018-03-26	56
2018-03-27	37
2018-03-28	13
2018-03-29	2

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in United States and Mexico, 20 to 29 March 2018 ranked by margin
Mina, 03-22	3.9 C (7.0 F)
Ashland, 03-24	2.8 C (5.0 F)
Hereford, 03-24	2.8 C (5.0 F)
Castle Rock, 03-23	2.2 C (4.0 F)
Lakin, 03-24	2.2 C (4.0 F)
Ulysses 3NE, 03-24	2.2 C (4.0 F)
Tombstone, 03-23	2.2 C (4.0 F)
Rocky Ford 2 SE, 03-23	1.7 C (3.1 F)
Ft Davis, 03-25	1.7 C (3.1 F)
Elsinore, 03-22	1.6 C (2.9 F)
Estancia 4N, 03-25	1.1 C (2.0 F)
Sugar Land, 03-27	1.1 C (2.0 F)
Greenville Kgvl Radio, 03-27	1.1 C (2.0 F)
Hillsboro, 03-25	1.1 C (2.0 F)
Caballo Dam, 03-26	0.6 C (1.1 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

455 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, 20 to 29 March 2018
Margin (C)	Years the old record stood
3.9	96
0.5	89
1.6	112
2.2	108
1.7	108
2.8	111
1.7	112
2.8	108
2.2	111
2.2	111
0.6	78
1.1	112
1.1	112
0.6	101
2.2	87
0.6	121
0.6	116
0.5	118
1.1	111
1.1	111
1.1	111
1.1	108
1.1	117
1.1	122
0.5	112
0.5	111
0.5	111
0.5	108
0.6	100
0.5	113
0.6	111
1.1	89
0.5	92
0.5	92
1.7	87
3.3	84
4.4	67
1.1	87
0.6	88
0.5	89
3.3	57
0.6	87
1.1	54
1.1	80
0.5	88
1.7	39
0.5	80
0.5	83
0.5	79
0.6	79
2.2	57
1.6	68
1.1	50
0.6	72
0.6	46
1.1	71
3.4	47
1.2	68
1.7	68
3.3	61
1.1	59
2.2	68
3.3	40
0.6	45
0.6	68
2.2	51
0.5	43
2.7	40
0.6	68
1.1	57
0.5	57
2.8	51
1.1	57
0.6	68
2.8	61
0.6	69
1.1	68
2.2	55
0.5	64
1.1	51
2.8	45
1.1	64
0.6	68
1.1	59
2.8	52
0.6	36
2.8	40
1.1	51
1.2	51
1.7	47
0.6	59
0.5	56
0.5	56
1.1	45
1.7	44
1.1	57
0.5	45
0.5	61
0.5	56
0.5	13
0.5	61
0.5	61
0.6	59
1.7	47
1.1	40
0.6	43
1.1	40
1.1	47
1.1	51
2.8	45
1.7	40
1.7	45
2.2	45
1.6	47
2.8	20
2.8	20
0.6	45
0.6	41
3.9	41
1.7	40
2.2	6
0.5	51
0.6	51
1.7	28
1.1	51
1.7	40
0.5	24
0.6	52
1.1	40
1.2	28
2.2	40
3.3	24
1.7	41
1.2	45
0.6	40
3.4	13
1.2	45
2.3	40
1.1	40
1.7	28
0.5	40
2.2	28
0.1	45
1.1	40
3.9	12
0.6	40
2.8	23
1.7	32
1.6	21
6.6	5
0.5	47
1.1	40
1.7	32
1.1	41
2.2	41
0.5	43
0.7	45
1.7	13
1.1	27
1.1	40
1.1	20
2.8	8
1.1	40
1.1	40
2.7	33
1.1	29
1.1	23
1.1	41
2.8	20
1.7	13
0.5	6
0.5	43
0.5	20
0.5	20
0.6	40
0.6	40
2.8	28
0.6	24
1.7	16
2.8	23
0.6	20
2.2	28
2.8	20
1.6	28
3.3	29
0.5	40
0.6	41
1.1	23
0.6	40
1.1	20
1.1	20
0.6	32
0.6	28
1.7	20
0.6	17
2.3	0
1.1	32
2.2	16
1.1	20
1.7	32

Compared With Other Events

Station records per event

Station records in Heat wave in United States and Mexico, 20 to 29 March 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, 20 to 29 March 2018 (this event)	455 records

Every Record Set

20 of 455

Every record set or tied during Heat wave in United States and Mexico, 20 to 29 March 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-03-22	Mina	Record high minimum temperature	11.7 C (53.1 F)	3.9 C (7.0 F)	96	47 of 100 (Notable)
2018-03-22	Elsinore	Record high minimum temperature	14.4 C (57.9 F)	1.6 C (2.9 F)	112	44 of 100 (Notable)
2018-03-22	Ft Valley	Record high minimum temperature	2.8 C (37.0 F)	0.6 C (1.1 F)	101	41 of 100 (Notable)
2018-03-22	Santa Cruz	Record high minimum temperature	12.8 C (55.0 F)	0.6 C (1.1 F)	121	41 of 100 (Notable)
2018-03-23	Hermit 8 SE	Record high minimum temperature	1.1 C (34.0 F)	0.5 C (0.9 F)	89	45 of 100 (Notable)
2018-03-23	Castle Rock	Record high minimum temperature	8.3 C (46.9 F)	2.2 C (4.0 F)	108	43 of 100 (Notable)
2018-03-23	Rocky Ford 2 SE	Record high minimum temperature	10.6 C (51.1 F)	1.7 C (3.1 F)	108	43 of 100 (Notable)
2018-03-23	Tombstone	Record high minimum temperature	13.9 C (57.0 F)	2.2 C (4.0 F)	87	41 of 100 (Notable)
2018-03-24	Ashland	Record high maximum temperature	33.9 C (93.0 F)	2.8 C (5.0 F)	111	43 of 100 (Notable)
2018-03-24	Hereford	Record high maximum temperature	31.7 C (89.1 F)	2.8 C (5.0 F)	108	43 of 100 (Notable)
2018-03-24	Lakin	Record high maximum temperature	33.3 C (91.9 F)	2.2 C (4.0 F)	111	42 of 100 (Notable)
2018-03-24	Ulysses 3NE	Record high maximum temperature	32.8 C (91.0 F)	2.2 C (4.0 F)	111	42 of 100 (Notable)
2018-03-24	Bosque del Apache	Record high maximum temperature	31.1 C (88.0 F)	0.5 C (0.9 F)	118	41 of 100 (Notable)
2018-03-25	Ft Davis	Record high minimum temperature	11.7 C (53.1 F)	1.7 C (3.1 F)	112	43 of 100 (Notable)
2018-03-25	Estancia 4N	Record high minimum temperature	5.0 C (41.0 F)	1.1 C (2.0 F)	112	42 of 100 (Notable)
2018-03-25	Hillsboro	Record high minimum temperature	20.0 C (68.0 F)	1.1 C (2.0 F)	111	41 of 100 (Notable)
2018-03-26	Caballo Dam	Record high minimum temperature	13.9 C (57.0 F)	0.6 C (1.1 F)	78	42 of 100 (Notable)
2018-03-27	Sugar Land	Record high minimum temperature	22.2 C (72.0 F)	1.1 C (2.0 F)	112	42 of 100 (Notable)
2018-03-27	Greenville Kgvl Radio	Record high minimum temperature	21.1 C (70.0 F)	1.1 C (2.0 F)	111	41 of 100 (Notable)
2018-03-28	New Iberia AP - Acadiana Rgnl	Record high minimum temperature	21.7 C (71.1 F)	0.6 C (1.1 F)	116	41 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 455 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
3.9	96
0.5	89
1.6	112
2.2	108
1.7	108
2.8	111
1.7	112
2.8	108
2.2	111
2.2	111
0.6	78
1.1	112
1.1	112
0.6	101
2.2	87
0.6	121
0.6	116
0.5	118
1.1	111
1.1	111
1.1	111
1.1	108
1.1	117
1.1	122
0.5	112
0.5	111
0.5	111
0.5	108
0.6	100
0.5	113
0.6	111
1.1	89
0.5	92
0.5	92
1.7	87
3.3	84
4.4	67
1.1	87
0.6	88
0.5	89
3.3	57
0.6	87
1.1	54
1.1	80
0.5	88
1.7	39
0.5	80
0.5	83
0.5	79
0.6	79
2.2	57
1.6	68
1.1	50
0.6	72
0.6	46
1.1	71
3.4	47
1.2	68
1.7	68
3.3	61
1.1	59
2.2	68
3.3	40
0.6	45
0.6	68
2.2	51
0.5	43
2.7	40
0.6	68
1.1	57
0.5	57
2.8	51
1.1	57
0.6	68
2.8	61
0.6	69
1.1	68
2.2	55
0.5	64
1.1	51
2.8	45
1.1	64
0.6	68
1.1	59
2.8	52
0.6	36
2.8	40
1.1	51
1.2	51
1.7	47
0.6	59
0.5	56
0.5	56
1.1	45
1.7	44
1.1	57
0.5	45
0.5	61
0.5	56
0.5	13
0.5	61
0.5	61
0.6	59
1.7	47
1.1	40
0.6	43
1.1	40
1.1	47
1.1	51
2.8	45
1.7	40
1.7	45
2.2	45
1.6	47
2.8	20
2.8	20
0.6	45
0.6	41
3.9	41
1.7	40
2.2	6
0.5	51
0.6	51
1.7	28
1.1	51
1.7	40
0.5	24
0.6	52
1.1	40
1.2	28
2.2	40
3.3	24
1.7	41
1.2	45
0.6	40
3.4	13
1.2	45
2.3	40
1.1	40
1.7	28
0.5	40
2.2	28
0.1	45
1.1	40
3.9	12
0.6	40
2.8	23
1.7	32
1.6	21
6.6	5
0.5	47
1.1	40
1.7	32
1.1	41
2.2	41
0.5	43
0.7	45
1.7	13
1.1	27
1.1	40
1.1	20
2.8	8
1.1	40
1.1	40
2.7	33
1.1	29
1.1	23
1.1	41
2.8	20
1.7	13
0.5	6
0.5	43
0.5	20
0.5	20
0.6	40
0.6	40
2.8	28
0.6	24
1.7	16
2.8	23
0.6	20
2.2	28
2.8	20
1.6	28
3.3	29
0.5	40
0.6	41
1.1	23
0.6	40
1.1	20
1.1	20
0.6	32
0.6	28
1.7	20
0.6	17
2.3	0
1.1	32
2.2	16
1.1	20
1.7	32

Margin (C)	Years the old record stood
3.9	96
0.5	89
1.6	112
2.2	108
1.7	108
2.8	111
1.7	112
2.8	108
2.2	111
2.2	111
0.6	78
1.1	112
1.1	112
0.6	101
2.2	87
0.6	121
0.6	116
0.5	118
1.1	111
1.1	111
1.1	111
1.1	108
1.1	117
1.1	122
0.5	112
0.5	111
0.5	111
0.5	108
0.6	100
0.5	113
0.6	111
1.1	89
0.5	92
0.5	92
1.7	87
3.3	84
4.4	67
1.1	87
0.6	88
0.5	89
3.3	57
0.6	87
1.1	54
1.1	80
0.5	88
1.7	39
0.5	80
0.5	83
0.5	79
0.6	79
2.2	57
1.6	68
1.1	50
0.6	72
0.6	46
1.1	71
3.4	47
1.2	68
1.7	68
3.3	61
1.1	59
2.2	68
3.3	40
0.6	45
0.6	68
2.2	51
0.5	43
2.7	40
0.6	68
1.1	57
0.5	57
2.8	51
1.1	57
0.6	68
2.8	61
0.6	69
1.1	68
2.2	55
0.5	64
1.1	51
2.8	45
1.1	64
0.6	68
1.1	59
2.8	52
0.6	36
2.8	40
1.1	51
1.2	51
1.7	47
0.6	59
0.5	56
0.5	56
1.1	45
1.7	44
1.1	57
0.5	45
0.5	61
0.5	56
0.5	13
0.5	61
0.5	61
0.6	59
1.7	47
1.1	40
0.6	43
1.1	40
1.1	47
1.1	51
2.8	45
1.7	40
1.7	45
2.2	45
1.6	47
2.8	20
2.8	20
0.6	45
0.6	41
3.9	41
1.7	40
2.2	6
0.5	51
0.6	51
1.7	28
1.1	51
1.7	40
0.5	24
0.6	52
1.1	40
1.2	28
2.2	40
3.3	24
1.7	41
1.2	45
0.6	40
3.4	13
1.2	45
2.3	40
1.1	40
1.7	28
0.5	40
2.2	28
0.1	45
1.1	40
3.9	12
0.6	40
2.8	23
1.7	32
1.6	21
6.6	5
0.5	47
1.1	40
1.7	32
1.1	41
2.2	41
0.5	43
0.7	45
1.7	13
1.1	27
1.1	40
1.1	20
2.8	8
1.1	40
1.1	40
2.7	33
1.1	29
1.1	23
1.1	41
2.8	20
1.7	13
0.5	6
0.5	43
0.5	20
0.5	20
0.6	40
0.6	40
2.8	28
0.6	24
1.7	16
2.8	23
0.6	20
2.2	28
2.8	20
1.6	28
3.3	29
0.5	40
0.6	41
1.1	23
0.6	40
1.1	20
1.1	20
0.6	32
0.6	28
1.7	20
0.6	17
2.3	0
1.1	32
2.2	16
1.1	20
1.7	32