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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Heat wave in United States and Mexico, 24 May to 19 June 2020

Heat wave in United States and Mexico, 24 May to 19 June 2020: 5,047 records at 2,215 stations, peak on 30 May 2020. Closed.

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

Key Facts

  • Heat wave in United States and Mexico, 24 May to 19 June 2020 set or tied 5,047 station records at 2,215 stations.
  • It ran from 24 May 2020 to 19 June 2020 (27 days) and its peak day was 30 May 2020.
  • Status: closed.
  • Newport Beach Harbor set a daily record high maximum temperature of 31.7 C (89.1 F) on 8 June 2020.
  • The busiest day was 30 May 2020 with 430 records.
  • The oldest broken record in the ranked list had stood for 146 years.

Footprint

24 May to 19 June 2020
Footprint of Heat wave in United States and Mexico, 24 May to 19 June 2020 The area covered by Heat wave in United States and Mexico, 24 May to 19 June 2020 is outlined, with 18 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in United States and Mexico, 24 May to 19 June 2020 is outlined, with 18 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in United States and Mexico, 24 May to 19 June 2020: stations that set records in the event
StationTypeValueDate
Newport Beach HarborRecord high maximum temperature31.7 C (89.1 F)2020-06-08
De SablaRecord high minimum temperature25.6 C (78.1 F)2020-05-26
ThermopolisRecord high minimum temperature20.6 C (69.1 F)2020-05-31
Ely APRecord high minimum temperature13.3 C (55.9 F)2020-05-29
Dillon U of Montana WesternRecord high minimum temperature15.6 C (60.1 F)2020-05-31
CulbertsonRecord high minimum temperature21.7 C (71.1 F)2020-06-14
Avalon Catalina APRecord high minimum temperature19.4 C (66.9 F)2020-05-26
MinaRecord high minimum temperature21.7 C (71.1 F)2020-05-29
Winnemucca APRecord high maximum temperature37.8 C (100.0 F)2020-05-29
Ashton 1NRecord high minimum temperature14.4 C (57.9 F)2020-05-30
BeowaweRecord high maximum temperature37.2 C (99.0 F)2020-05-29
Ft RossRecord high maximum temperature29.4 C (84.9 F)2020-06-05
Brookings 2 NERecord high minimum temperature23.3 C (73.9 F)2020-06-08
BusbyRecord high minimum temperature20.6 C (69.1 F)2020-06-13
Wakefield 3NWRecord high minimum temperature25.6 C (78.1 F)2020-06-08
CantonRecord high minimum temperature24.4 C (75.9 F)2020-06-08
Santa BarbaraRecord high maximum temperature35.6 C (96.1 F)2020-06-09
SavageRecord high minimum temperature22.2 C (72.0 F)2020-06-14

Records per Day

Peak day 430
Records per day during Heat wave in United States and Mexico, 24 May to 19 June 2020 Records set or tied each day from 24 May 2020 to 19 June 2020. The most in one day was 430 on 30 May 2020. 0 125 250 375 500 05-2405-2705-3006-0206-0506-0806-1106-1406-17
Records set or tied each day from 24 May 2020 to 19 June 2020. The most in one day was 430 on 30 May 2020.
Records per day during Heat wave in United States and Mexico, 24 May to 19 June 2020
DateRecords
2020-05-243
2020-05-2541
2020-05-26156
2020-05-27225
2020-05-28257
2020-05-29334
2020-05-30430
2020-05-31272
2020-06-01259
2020-06-02358
2020-06-03356
2020-06-04201
2020-06-05317
2020-06-06255
2020-06-07161
2020-06-08225
2020-06-09191
2020-06-10172
2020-06-11141
2020-06-12232
2020-06-13166
2020-06-1469
2020-06-1528
2020-06-1691
2020-06-1782
2020-06-1821
2020-06-194

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in United States and Mexico, 24 May to 19 June 2020 ranked by margin
De Sabla, 05-278.8 C (15.8 F)
Newport Beach Harbor, 06-088.4 C (15.1 F)
De Sabla, 05-266.7 C (12.1 F)
Avalon Catalina AP, 05-266.6 C (11.9 F)
De Sabla, 06-045.0 C (9.0 F)
Culbertson, 06-145.0 C (9.0 F)
Dillon U of Montana Western, 05-314.5 C (8.1 F)
Brookings 2 NE, 06-084.4 C (7.9 F)
Canton, 06-084.4 C (7.9 F)
Busby, 06-133.9 C (7.0 F)
Savage, 06-143.9 C (7.0 F)
Wakefield 3NW, 06-083.9 C (7.0 F)
Thermopolis, 05-313.4 C (6.1 F)
Santa Barbara, 06-092.8 C (5.0 F)
Ft Ross, 06-052.7 C (4.9 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

Margin against age of the broken record in Heat wave in United States and Mexico, 24 May to 19 June 2020 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. 0 38 75 113 150 0.02.55.07.510.0 Margin (C) Years the old record stood
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, 24 May to 19 June 2020
Margin (C)Years the old record stood
8.490
6.7109
8.8101
3.4119
5.0101
1.1120
5.0108
4.5106
1.195
0.6101
6.669
1.1109
2.7121
3.9102
0.5109
4.4109
2.8125
3.998
3.9106
4.4109
3.4110
6.230
5.080
1.791
4.5125
2.2102
2.3121
2.3112
3.4106
2.8106
3.3121
3.3106
3.992
2.8110
2.399
2.8106
2.3126
4.487
4.582
2.7102
3.3118
2.2122
1.679
2.7109
0.586
2.2109
2.8118
2.8107
4.589
2.2106
2.8109
2.2101
3.966
1.7108
2.2124
2.2115
2.2106
2.2109
2.3108
1.177
1.6142
1.7106
1.2100
3.386
1.7109
0.577
1.6105
2.2120
1.7106
1.7106
1.7106
1.6109
1.2120
1.7131
2.299
1.7114
2.3118
1.7106
1.7106
2.299
2.299
2.2109
1.1122
3.392
1.6115
3.983
1.7106
10.01
0.677
2.2116
1.1105
1.1110
1.1110
1.1121
1.1109
1.1102
1.1109
1.1102
1.6120
3.389
1.6124
1.7109
1.6121
2.886
2.273
1.6120
1.7120
1.799
1.1109
3.487
2.295
1.1117
1.799
1.2110
1.2105
1.7106
1.7106
2.2107
1.1122
5.041
0.672
3.488
1.1101
0.6113
2.387
1.1123
1.2113
1.1101
1.6102
1.1109
3.980
1.1106
1.795
1.1123
1.1117
1.1111
1.1108
1.1109
1.1110
1.1109
1.1106
1.696
1.166
1.1109
5.076
1.1102
1.1126
4.474
0.5110
0.6104
0.6110
0.6110
0.5131
1.296
1.194
5.655
0.6101
0.6108
0.6116
0.5123
0.6123
0.5121
0.6106
1.194
0.6113
0.5102
0.6109
0.5106
0.5106
0.6100
0.6146
0.5106
0.6106
0.6124
0.5125
0.5118
2.887
0.6123
0.6106
0.5109
2.886
2.287
2.784
0.6102
2.886
0.6106
2.287
0.6106
0.6106
0.6106
0.5107
0.6114
0.6123
0.6108
2.287
0.5109
0.6123
1.198
0.5125
0.6113

Compared With Other Events

Station records per event
Station records in Heat wave in United States and Mexico, 24 May to 19 June 2020 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 20249,869 records
Heat wave in United States, 28 January to 24 February 20266,528 records
Heat wave in United States and Mexico, 24 May to 19 June 2020 (this event)5,047 records
Heat wave in United States and Mexico, 26 March to 17 April 20213,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 20223,626 records
Heat wave in United States and Mexico, 24 October to 17 November 20223,289 records

Every Record Set

20 of 5,047
Every record set or tied during Heat wave in United States and Mexico, 24 May to 19 June 2020, in date order
DateStationRecordValueMarginYears stoodSignificance
2020-05-26De SablaRecord high minimum temperature25.6 C (78.1 F)6.7 C (12.1 F)10968 of 100 (Major)
2020-05-26Avalon Catalina APRecord high minimum temperature19.4 C (66.9 F)6.6 C (11.9 F)6951 of 100 (Notable)
2020-05-27De SablaRecord high minimum temperature24.4 C (75.9 F)8.8 C (15.8 F)10164 of 100 (Major)
2020-05-29Ely APRecord high minimum temperature13.3 C (55.9 F)1.1 C (2.0 F)12053 of 100 (Notable)
2020-05-29MinaRecord high minimum temperature21.7 C (71.1 F)0.6 C (1.1 F)10151 of 100 (Notable)
2020-05-29Winnemucca APRecord high maximum temperature37.8 C (100.0 F)1.1 C (2.0 F)10951 of 100 (Notable)
2020-05-29BeowaweRecord high maximum temperature37.2 C (99.0 F)0.5 C (0.9 F)10950 of 100 (Notable)
2020-05-30Ashton 1NRecord high minimum temperature14.4 C (57.9 F)1.1 C (2.0 F)9551 of 100 (Notable)
2020-05-31ThermopolisRecord high minimum temperature20.6 C (69.1 F)3.4 C (6.1 F)11958 of 100 (Notable)
2020-05-31Dillon U of Montana WesternRecord high minimum temperature15.6 C (60.1 F)4.5 C (8.1 F)10652 of 100 (Notable)
2020-06-04De SablaRecord high minimum temperature21.7 C (71.1 F)5.0 C (9.0 F)10153 of 100 (Notable)
2020-06-05Ft RossRecord high maximum temperature29.4 C (84.9 F)2.7 C (4.9 F)12150 of 100 (Notable)
2020-06-08Newport Beach HarborRecord high maximum temperature31.7 C (89.1 F)8.4 C (15.1 F)9077 of 100 (Major)
2020-06-08Brookings 2 NERecord high minimum temperature23.3 C (73.9 F)4.4 C (7.9 F)10950 of 100 (Notable)
2020-06-08Wakefield 3NWRecord high minimum temperature25.6 C (78.1 F)3.9 C (7.0 F)10649 of 100 (Notable)
2020-06-08CantonRecord high minimum temperature24.4 C (75.9 F)4.4 C (7.9 F)10949 of 100 (Notable)
2020-06-09Santa BarbaraRecord high maximum temperature35.6 C (96.1 F)2.8 C (5.0 F)12549 of 100 (Notable)
2020-06-13BusbyRecord high minimum temperature20.6 C (69.1 F)3.9 C (7.0 F)10250 of 100 (Notable)
2020-06-14CulbertsonRecord high minimum temperature21.7 C (71.1 F)5.0 C (9.0 F)10852 of 100 (Notable)
2020-06-14SavageRecord high minimum temperature22.2 C (72.0 F)3.9 C (7.0 F)9849 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 5,047 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.