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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, 20 March to 9 April 2023

Heat wave in United States and Mexico, 20 March to 9 April 2023: 1,740 records at 963 stations, peak on 5 April 2023. Closed.

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

Key Facts

  • Heat wave in United States and Mexico, 20 March to 9 April 2023 set or tied 1,740 station records at 963 stations.
  • It ran from 20 March 2023 to 9 April 2023 (21 days) and its peak day was 5 April 2023.
  • Status: closed.
  • Poplarville Exp STN set a monthly record high minimum temperature of 26.7 C (80.1 F) on 25 March 2023.
  • The busiest day was 5 April 2023 with 501 records.
  • The oldest broken record in the ranked list had stood for 134 years.

Footprint

20 March to 9 April 2023
Footprint of Heat wave in United States and Mexico, 20 March to 9 April 2023 The area covered by Heat wave in United States and Mexico, 20 March to 9 April 2023 is outlined, with 19 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in United States and Mexico, 20 March to 9 April 2023 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, 20 March to 9 April 2023: stations that set records in the event
StationTypeValueDate
Poplarville Exp STNRecord high minimum temperature26.7 C (80.1 F)2023-03-25
NashvilleRecord high minimum temperature21.1 C (70.0 F)2023-04-05
BatesburgRecord high minimum temperature16.7 C (62.1 F)2023-04-06
HardyRecord high minimum temperature18.9 C (66.0 F)2023-04-05
Chickamauga 2 SWRecord high minimum temperature17.8 C (64.0 F)2023-04-05
Lafayette Rgnl APRecord high maximum temperature32.2 C (90.0 F)2023-04-01
BentonRecord high minimum temperature21.1 C (70.0 F)2023-04-05
Mtn Home 1 NNWRecord high minimum temperature20.0 C (68.0 F)2023-04-05
ConroeRecord high minimum temperature24.4 C (75.9 F)2023-04-05
AshevilleRecord high minimum temperature17.8 C (64.0 F)2023-04-05
ScottsboroRecord high maximum temperature32.2 C (90.0 F)2023-04-06
CorneliaRecord high minimum temperature18.3 C (64.9 F)2023-04-06
WinnsboroRecord high minimum temperature19.4 C (66.9 F)2023-04-06
TiftonRecord high maximum temperature31.7 C (89.1 F)2023-04-07
Mocksville 5SERecord high minimum temperature15.0 C (59.0 F)2023-04-07
DarlingtonRecord high minimum temperature19.4 C (66.9 F)2023-04-07
HarrisonRecord high minimum temperature20.6 C (69.1 F)2023-04-04
Marianna 2 SRecord high minimum temperature21.1 C (70.0 F)2023-04-05
MorriltonRecord high minimum temperature21.7 C (71.1 F)2023-04-05

Records per Day

Peak day 501
Records per day during Heat wave in United States and Mexico, 20 March to 9 April 2023 Records set or tied each day from 20 March 2023 to 9 April 2023. The most in one day was 501 on 5 April 2023. 0 150 300 450 600 03-2003-2303-2603-2904-0104-0404-07
Records set or tied each day from 20 March 2023 to 9 April 2023. The most in one day was 501 on 5 April 2023.
Records per day during Heat wave in United States and Mexico, 20 March to 9 April 2023
DateRecords
2023-03-201
2023-03-211
2023-03-2219
2023-03-2387
2023-03-24147
2023-03-25124
2023-03-2674
2023-03-2747
2023-03-288
2023-03-298
2023-03-304
2023-03-3118
2023-04-0148
2023-04-0224
2023-04-0353
2023-04-04230
2023-04-05501
2023-04-06278
2023-04-0763
2023-04-083
2023-04-092

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in United States and Mexico, 20 March to 9 April 2023 ranked by margin
Nashville, 04-054.4 C (7.9 F)
Cornelia, 04-063.3 C (5.9 F)
Conroe, 04-053.3 C (5.9 F)
Poplarville Exp STN, 03-252.8 C (5.0 F)
Batesburg, 04-062.8 C (5.0 F)
Hardy, 04-052.8 C (5.0 F)
Chickamauga 2 SW, 04-052.8 C (5.0 F)
Harrison, 04-042.8 C (5.0 F)
Marianna 2 S, 04-052.8 C (5.0 F)
Morrilton, 04-052.8 C (5.0 F)
Batesburg, 04-072.7 C (4.9 F)
Scottsboro, 04-062.2 C (4.0 F)
Benton, 04-052.2 C (4.0 F)
Mtn Home 1 NNW, 04-052.2 C (4.0 F)
Mocksville 5SE, 04-072.2 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

Margin against age of the broken record in Heat wave in United States and Mexico, 20 March to 9 April 2023 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 0.02.04.06.08.0 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, 20 March to 9 April 2023
Margin (C)Years the old record stood
2.8119
4.494
2.8125
2.8100
2.8112
2.7113
2.2104
2.2113
2.2120
3.393
1.7112
2.2127
2.2113
2.2113
3.393
2.2112
1.6114
2.893
2.894
2.893
1.1114
1.7123
2.2112
1.2112
2.893
2.2101
1.7109
1.6104
2.3118
3.493
1.181
1.7120
1.1109
2.393
1.1125
2.394
1.168
1.1116
1.1113
1.1112
2.293
1.2114
1.1113
3.490
1.1125
2.294
1.1129
2.296
2.893
1.6113
1.7101
1.6100
2.794
1.1113
1.1112
2.393
1.7102
1.1120
1.2129
5.680
1.693
0.6112
0.6116
0.6113
1.1116
1.793
0.6108
0.6134
0.6113
0.6105
0.5101
1.1113
2.293
0.6100
0.6104
0.5114
1.1112
0.6127
1.793
0.6116
1.1110
0.6110
1.1100
0.6113
0.6116
0.5113
1.1113
1.793
2.888
0.6112
0.6112
0.6104
1.794
1.693
0.6109
0.6105
1.1102
0.6116
5.080
2.293
1.1105
1.1112
1.793
0.6110
0.5125
0.5109
1.796
1.193
0.5109
0.5124
1.793
2.293
0.6118
1.196
1.193
1.193
0.6101
0.6112
0.6101
1.193
0.5112
1.193
0.5113
0.5129
0.5116
0.5118
0.5105
0.5109
1.788
2.288
1.794
0.693
0.696
0.693
0.693
1.193
1.193
1.193
3.380
1.293
1.193
1.193
0.693
0.693
3.380
1.193
0.694
0.696
0.696
1.193
2.288
2.288
0.693
1.688
5.074
1.188
0.694
3.482
1.288
1.190
0.593
0.693
0.593
0.593
0.693
2.780
1.193
0.693
1.190
0.593
0.593
2.288
0.693
1.188
2.282
6.174
1.194
0.568
0.593
2.777
1.188
1.188
1.188
0.593
0.586
1.186
2.280
2.380
1.188
1.188
1.188
0.688
1.189
0.688
3.976
3.468
0.568
3.976
1.782
0.686

Compared With Other Events

Station records per event
Station records in Heat wave in United States and Mexico, 20 March to 9 April 2023 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 20205,047 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, 20 March to 9 April 2023 (this event)1,740 records

Every Record Set

20 of 1,740
Every record set or tied during Heat wave in United States and Mexico, 20 March to 9 April 2023, in date order
DateStationRecordValueMarginYears stoodSignificance
2023-03-25Poplarville Exp STNRecord high minimum temperature26.7 C (80.1 F)2.8 C (5.0 F)11954 of 100 (Notable)
2023-04-01Lafayette Rgnl APRecord high maximum temperature32.2 C (90.0 F)1.6 C (2.9 F)11444 of 100 (Notable)
2023-04-04HarrisonRecord high minimum temperature20.6 C (69.1 F)2.8 C (5.0 F)9343 of 100 (Notable)
2023-04-05NashvilleRecord high minimum temperature21.1 C (70.0 F)4.4 C (7.9 F)9446 of 100 (Notable)
2023-04-05HardyRecord high minimum temperature18.9 C (66.0 F)2.8 C (5.0 F)10045 of 100 (Notable)
2023-04-05Chickamauga 2 SWRecord high minimum temperature17.8 C (64.0 F)2.8 C (5.0 F)11245 of 100 (Notable)
2023-04-05BentonRecord high minimum temperature21.1 C (70.0 F)2.2 C (4.0 F)11344 of 100 (Notable)
2023-04-05Mtn Home 1 NNWRecord high minimum temperature20.0 C (68.0 F)2.2 C (4.0 F)12044 of 100 (Notable)
2023-04-05ConroeRecord high minimum temperature24.4 C (75.9 F)3.3 C (5.9 F)9344 of 100 (Notable)
2023-04-05AshevilleRecord high minimum temperature17.8 C (64.0 F)2.2 C (4.0 F)11244 of 100 (Notable)
2023-04-05Marianna 2 SRecord high minimum temperature21.1 C (70.0 F)2.8 C (5.0 F)9443 of 100 (Notable)
2023-04-05MorriltonRecord high minimum temperature21.7 C (71.1 F)2.8 C (5.0 F)9343 of 100 (Notable)
2023-04-06BatesburgRecord high minimum temperature16.7 C (62.1 F)2.8 C (5.0 F)12546 of 100 (Notable)
2023-04-06ScottsboroRecord high maximum temperature32.2 C (90.0 F)2.2 C (4.0 F)10444 of 100 (Notable)
2023-04-06CorneliaRecord high minimum temperature18.3 C (64.9 F)3.3 C (5.9 F)9344 of 100 (Notable)
2023-04-06WinnsboroRecord high minimum temperature19.4 C (66.9 F)2.2 C (4.0 F)11344 of 100 (Notable)
2023-04-07BatesburgRecord high minimum temperature18.3 C (64.9 F)2.7 C (4.9 F)11345 of 100 (Notable)
2023-04-07TiftonRecord high maximum temperature31.7 C (89.1 F)1.7 C (3.1 F)11244 of 100 (Notable)
2023-04-07Mocksville 5SERecord high minimum temperature15.0 C (59.0 F)2.2 C (4.0 F)12744 of 100 (Notable)
2023-04-07DarlingtonRecord high minimum temperature19.4 C (66.9 F)2.2 C (4.0 F)11344 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 1,740 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.