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Built 2026-10-19 (19 October 2026)

Heat wave in China and 2 other countries, 27 July to 13 August 2021

Heat wave in China and 2 other countries, 27 July to 13 August 2021: 311 records at 84 stations, peak on 8 August 2021. Closed.

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

Key Facts

  • Heat wave in China and 2 other countries, 27 July to 13 August 2021 set or tied 311 station records at 84 stations.
  • It ran from 27 July 2021 to 13 August 2021 (18 days) and its peak day was 8 August 2021.
  • Status: closed.
  • Wudu set a monthly record high maximum temperature of 39.0 C (102.2 F) on 31 July 2021.
  • The busiest day was 8 August 2021 with 38 records.
  • The oldest broken record in the ranked list had stood for 70 years.

Footprint

27 July to 13 August 2021
Footprint of Heat wave in China and 2 other countries, 27 July to 13 August 2021 The area covered by Heat wave in China and 2 other countries, 27 July to 13 August 2021 is outlined, with 17 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in China and 2 other countries, 27 July to 13 August 2021 is outlined, with 17 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in China and 2 other countries, 27 July to 13 August 2021: stations that set records in the event
StationTypeValueDate
WuduRecord high maximum temperature39.0 C (102.2 F)2021-07-31
Ubon RatchathaniRecord high minimum temperature27.0 C (80.6 F)2021-08-08
TaiyuanRecord high maximum temperature37.2 C (99.0 F)2021-08-01
LijingRecord high maximum temperature29.2 C (84.6 F)2021-08-07
KunmingRecord high maximum temperature30.0 C (86.0 F)2021-08-07
VinhRecord high minimum temperature32.0 C (89.6 F)2021-08-07
Chiang RaiRecord high minimum temperature25.4 C (77.7 F)2021-07-30
PingliangRecord high maximum temperature35.8 C (96.4 F)2021-08-01
XichangRecord high minimum temperature23.4 C (74.1 F)2021-08-07
LongzhouRecord high maximum temperature39.3 C (102.7 F)2021-08-07
YanchiRecord high maximum temperature37.4 C (99.3 F)2021-08-01
YibinRecord high maximum temperature39.0 C (102.2 F)2021-08-04
BaiseRecord high maximum temperature39.5 C (103.1 F)2021-08-07
XingrenRecord high minimum temperature22.4 C (72.3 F)2021-08-08
MukdahanRecord high maximum temperature36.6 C (97.9 F)2021-08-09
QionghaiRecord high maximum temperature37.3 C (99.1 F)2021-08-06
Sakon NakhonRecord high maximum temperature35.8 C (96.4 F)2021-08-09

Records per Day

Peak day 38
Records per day during Heat wave in China and 2 other countries, 27 July to 13 August 2021 Records set or tied each day from 27 July 2021 to 13 August 2021. The most in one day was 38 on 8 August 2021. 0 10 20 30 40 07-2707-2907-3108-0208-0408-0608-0808-1008-12
Records set or tied each day from 27 July 2021 to 13 August 2021. The most in one day was 38 on 8 August 2021.
Records per day during Heat wave in China and 2 other countries, 27 July to 13 August 2021
DateRecords
2021-07-271
2021-07-283
2021-07-295
2021-07-304
2021-07-3119
2021-08-0121
2021-08-0220
2021-08-0325
2021-08-0424
2021-08-0522
2021-08-0627
2021-08-0730
2021-08-0838
2021-08-0936
2021-08-1022
2021-08-116
2021-08-124
2021-08-134

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in China and 2 other countries, 27 July to 13 August 2021 ranked by margin
Xichang, 08-072.3 C (4.1 F)
Yibin, 08-042.0 C (3.6 F)
Longzhou, 08-071.9 C (3.4 F)
Kunming, 08-071.8 C (3.2 F)
Mukdahan, 08-091.4 C (2.5 F)
Ubon Ratchathani, 08-081.2 C (2.2 F)
Baise, 08-071.1 C (2.0 F)
Vinh, 08-071.0 C (1.8 F)
Xingren, 08-070.9 C (1.6 F)
Sakon Nakhon, 08-090.9 C (1.6 F)
Pingliang, 08-010.8 C (1.4 F)
Yanchi, 08-010.8 C (1.4 F)
Wudu, 07-300.8 C (1.4 F)
Qionghai, 08-060.7 C (1.3 F)
Taiyuan, 08-010.6 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

Margin against age of the broken record in Heat wave in China and 2 other countries, 27 July to 13 August 2021 311 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 20 40 60 80 0.00.61.31.92.5 Margin (C) Years the old record stood
311 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 China and 2 other countries, 27 July to 13 August 2021
Margin (C)Years the old record stood
0.170
1.268
0.665
0.269
0.167
1.868
1.043
0.847
2.344
1.968
0.667
0.848
2.064
0.243
1.168
1.464
0.968
0.768
0.964
0.868
0.568
1.066
0.560
0.368
0.964
1.162
0.468
0.468
0.368
0.468
0.963
1.234
0.268
0.164
0.168
0.948
1.424
0.362
1.750
0.659
0.267
0.264
0.230
1.148
0.264
0.260
0.260
1.054
2.536
0.356
0.643
0.643
0.164
0.554
0.548
0.852
0.355
0.356
0.636
1.643
2.528
2.232
1.724
0.544
0.348
0.551
1.019
0.924
1.043
0.93
0.936
1.224
0.843
1.036
1.234
0.443
0.444
1.043
0.344
0.66
0.244
0.146
2.118
0.924
0.143
0.144
0.148
0.624
0.723
1.84
0.930
2.124
1.423
2.04
1.616
0.732
0.310
2.320
1.727
0.60
0.732
1.122
0.243
0.239
0.24
0.40
0.339
0.534
0.142
0.35
0.528
0.13
0.924
1.011
0.431
1.324
1.527
0.812
0.618
0.20
0.432
0.234
0.134
1.622
1.318
0.927
0.136
0.136
1.718
0.134
0.719
0.719
0.134
0.231
0.520
0.231
0.234
0.618
0.424
1.024
1.228
0.45
0.524
1.412
0.926
0.132
0.423
0.827
0.528
0.132
0.86
0.132
0.424
0.87
0.84
0.131
0.431
0.731
0.532
0.327
1.118
0.327
1.318
0.626
1.218
1.118
1.318
0.918
1.218
0.124
0.524
0.124
0.612
0.139
0.20
0.98
2.27
0.522
0.518
0.912
1.64
1.210
0.320
0.418
0.123
0.66
0.220
0.84
1.04
0.318
0.528
1.60
0.124
0.518
0.715
0.418
0.418
1.08
0.418
0.910

Compared With Other Events

Station records per event
Station records in Heat wave in China and 2 other countries, 27 July to 13 August 2021 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 China and 2 other countries, 27 July to 13 August 2021 (this event)311 records

Every Record Set

20 of 311
Every record set or tied during Heat wave in China and 2 other countries, 27 July to 13 August 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-07-30Chiang RaiRecord high minimum temperature25.4 C (77.7 F)0.6 C (1.1 F)6733 of 100 (Routine)
2021-07-30WuduRecord high maximum temperature38.6 C (101.5 F)0.8 C (1.4 F)6829 of 100 (Routine)
2021-07-31WuduRecord high maximum temperature39.0 C (102.2 F)0.1 C (0.2 F)7038 of 100 (Notable)
2021-08-01TaiyuanRecord high maximum temperature37.2 C (99.0 F)0.6 C (1.1 F)6537 of 100 (Notable)
2021-08-01WuduRecord high maximum temperature39.0 C (102.2 F)0.2 C (0.4 F)6937 of 100 (Notable)
2021-08-01PingliangRecord high maximum temperature35.8 C (96.4 F)0.8 C (1.4 F)4733 of 100 (Routine)
2021-08-01YanchiRecord high maximum temperature37.4 C (99.3 F)0.8 C (1.4 F)4832 of 100 (Routine)
2021-08-04YibinRecord high maximum temperature39.0 C (102.2 F)2.0 C (3.6 F)6431 of 100 (Routine)
2021-08-06QionghaiRecord high maximum temperature37.3 C (99.1 F)0.7 C (1.3 F)6830 of 100 (Routine)
2021-08-07LijingRecord high maximum temperature29.2 C (84.6 F)0.1 C (0.2 F)6737 of 100 (Notable)
2021-08-07KunmingRecord high maximum temperature30.0 C (86.0 F)1.8 C (3.2 F)6835 of 100 (Notable)
2021-08-07VinhRecord high minimum temperature32.0 C (89.6 F)1.0 C (1.8 F)4334 of 100 (Routine)
2021-08-07XichangRecord high minimum temperature23.4 C (74.1 F)2.3 C (4.1 F)4433 of 100 (Routine)
2021-08-07LongzhouRecord high maximum temperature39.3 C (102.7 F)1.9 C (3.4 F)6833 of 100 (Routine)
2021-08-07BaiseRecord high maximum temperature39.5 C (103.1 F)1.1 C (2.0 F)6831 of 100 (Routine)
2021-08-07XingrenRecord high maximum temperature32.0 C (89.6 F)0.9 C (1.6 F)6830 of 100 (Routine)
2021-08-08Ubon RatchathaniRecord high minimum temperature27.0 C (80.6 F)1.2 C (2.2 F)6838 of 100 (Notable)
2021-08-08XingrenRecord high minimum temperature22.4 C (72.3 F)0.2 C (0.4 F)4331 of 100 (Routine)
2021-08-09MukdahanRecord high maximum temperature36.6 C (97.9 F)1.4 C (2.5 F)6431 of 100 (Routine)
2021-08-09Sakon NakhonRecord high maximum temperature35.8 C (96.4 F)0.9 C (1.6 F)6430 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 311 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.