Heat wave in China and 4 other countries, 23 September to 22 October 2020

Name: Heat wave in China and 4 other countries, 23 September to 22 October 2020
Start: 2020-09-23
End: 2020-10-22
Location: China, India, Thailand, Vietnam, Nepal

Heat wave in China and 4 other countries, 23 September to 22 October 2020: 307 records at 58 stations, peak on 10 October 2020. Closed.

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

Key Facts

Heat wave in China and 4 other countries, 23 September to 22 October 2020 set or tied 307 station records at 58 stations.
It ran from 23 September 2020 to 22 October 2020 (30 days) and its peak day was 10 October 2020.
Status: closed.
Deqen set a daily record high maximum temperature of 20.8 C (69.4 F) on 10 October 2020.
The busiest day was 2 October 2020 with 21 records.
The oldest broken record in the ranked list had stood for 69 years.

Footprint

23 September to 22 October 2020

The area covered by Heat wave in China and 4 other countries, 23 September to 22 October 2020 is outlined, with 13 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in China and 4 other countries, 23 September to 22 October 2020: stations that set records in the event
Station	Type	Value	Date
Deqen	Record high maximum temperature	20.8 C (69.4 F)	2020-10-10
Baingoin	Record high minimum temperature	4.8 C (40.6 F)	2020-10-01
Gauhati	Record high minimum temperature	26.4 C (79.5 F)	2020-10-10
Lhasa	Record high maximum temperature	24.6 C (76.3 F)	2020-09-29
Mae Sariang	Record high minimum temperature	24.5 C (76.1 F)	2020-10-06
Qumarleb	Record high maximum temperature	17.8 C (64.0 F)	2020-10-13
Darlag	Record high maximum temperature	20.0 C (68.0 F)	2020-10-13
Chiang Mai	Record high minimum temperature	24.9 C (76.8 F)	2020-09-30
Tuotuohe	Record high maximum temperature	15.2 C (59.4 F)	2020-10-11
Xigaze	Record high maximum temperature	23.2 C (73.8 F)	2020-09-29
Huili	Record high minimum temperature	18.8 C (65.8 F)	2020-10-06
Dongfang	Record high maximum temperature	34.4 C (93.9 F)	2020-10-06
Qamdo	Record high maximum temperature	26.7 C (80.1 F)	2020-10-13

Records per Day

Peak day 20

Records set or tied each day from 23 September 2020 to 22 October 2020. The most in one day was 21 on 2 October 2020.

Records per day during Heat wave in China and 4 other countries, 23 September to 22 October 2020
Date	Records
2020-09-23	1
2020-09-24	3
2020-09-25	6
2020-09-26	4
2020-09-27	10
2020-09-28	3
2020-09-29	11
2020-09-30	14
2020-10-01	13
2020-10-02	21
2020-10-03	11
2020-10-04	10
2020-10-05	11
2020-10-06	11
2020-10-07	7
2020-10-08	13
2020-10-09	16
2020-10-10	20
2020-10-11	13
2020-10-12	18
2020-10-13	19
2020-10-14	13
2020-10-15	16
2020-10-16	14
2020-10-17	12
2020-10-18	4
2020-10-19	8
2020-10-20	3
2020-10-21	1
2020-10-22	1

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in China and 4 other countries, 23 September to 22 October 2020 ranked by margin
Qumarleb, 10-13	3.8 C (6.8 F)
Darlag, 10-13	3.3 C (5.9 F)
Tuotuohe, 10-13	3.2 C (5.8 F)
Tuotuohe, 10-11	2.9 C (5.2 F)
Deqen, 10-10	2.7 C (4.9 F)
Tuotuohe, 10-12	2.5 C (4.5 F)
Gauhati, 10-10	2.4 C (4.3 F)
Lhasa, 09-29	2.0 C (3.6 F)
Xigaze, 10-15	1.2 C (2.2 F)
Huili, 10-06	1.0 C (1.8 F)
Qamdo, 10-13	1.0 C (1.8 F)
Xigaze, 09-29	0.9 C (1.6 F)
Deqen, 10-08	0.8 C (1.4 F)
Mae Sariang, 10-06	0.5 C (0.9 F)
Chiang Mai, 09-30	0.5 C (0.9 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

307 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 4 other countries, 23 September to 22 October 2020
Margin (C)	Years the old record stood
2.7	67
0.3	58
2.4	47
2.0	63
3.8	56
3.3	59
0.5	69
2.9	59
0.3	67
0.5	58
1.2	62
0.9	63
3.2	56
2.5	59
1.0	66
0.3	66
0.2	69
1.0	65
0.8	65
0.3	67
0.1	69
2.2	46
1.8	56
0.6	65
0.1	67
2.3	49
0.7	59
1.4	56
0.8	58
3.6	39
0.9	59
1.3	58
0.5	59
1.3	46
0.6	41
0.5	59
0.7	59
2.4	46
1.1	56
1.8	49
1.3	47
0.3	62
0.8	59
0.6	58
1.0	45
0.3	50
0.2	51
0.6	53
1.9	46
2.0	46
2.1	46
1.3	46
0.6	56
0.1	59
1.5	33
0.9	47
1.4	46
0.2	56
0.2	56
0.3	56
0.9	47
0.5	47
0.3	17
0.6	46
0.1	52
0.2	51
0.1	16
0.1	16
1.3	43
0.2	52
2.3	35
2.4	35
1.2	32
0.8	39
2.0	20
0.3	41
0.6	46
0.8	45
1.3	46
0.3	46
0.3	46
1.0	39
1.4	36
0.4	47
2.0	35
1.1	37
0.3	49
0.6	10
0.1	46
0.4	45
0.5	46
0.3	12
0.7	33
0.8	32
1.8	22
0.4	46
0.3	46
0.7	41
1.6	37
0.6	39
1.0	36
1.3	36
2.5	29
0.1	13
1.1	37
0.8	39
0.5	39
0.5	35
0.7	31
1.8	19
0.2	38
0.6	46
0.3	39
0.7	36
3.3	17
0.8	36
0.6	0
1.3	20
0.1	39
0.1	37
1.4	25
0.4	39
0.2	5
1.7	22
1.3	26
0.3	39
0.4	36
2.2	17
2.8	17
0.5	35
0.2	35
0.3	37
0.1	36
0.1	36
1.9	9
1.1	22
0.5	27
0.4	37
2.4	13
1.7	17
0.2	36
2.2	19
3.3	13
0.2	32
0.2	32
0.7	22
1.6	11
1.3	22
1.1	26
0.6	22
0.5	24
0.2	32
0.6	28
1.3	17
1.8	17
1.2	20
1.0	22
0.5	25
1.2	9
1.2	10
0.9	25
0.8	14
0.8	9
0.6	19
0.9	4
0.3	23
0.8	25
2.2	13
1.1	15
0.7	22
1.8	13
1.0	17
1.3	17
0.1	24
0.3	25
0.6	19
0.6	17
0.9	10
1.1	11
0.9	15
0.2	32
0.3	24
0.5	25
2.0	13
0.6	22
1.0	17
1.9	13
0.4	21
0.9	17
0.2	17
0.2	17
0.4	15
0.5	10
0.6	10
0.5	15
1.2	7
0.3	20
0.3	19
0.7	17
0.7	17

Compared With Other Events

Station records per event

Station records in Heat wave in China and 4 other countries, 23 September to 22 October 2020 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 China and 4 other countries, 23 September to 22 October 2020 (this event)	307 records

Every Record Set

20 of 307

Every record set or tied during Heat wave in China and 4 other countries, 23 September to 22 October 2020, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2020-09-29	Lhasa	Record high maximum temperature	24.6 C (76.3 F)	2.0 C (3.6 F)	63	32 of 100 (Routine)
2020-09-29	Xigaze	Record high maximum temperature	23.2 C (73.8 F)	0.9 C (1.6 F)	63	28 of 100 (Routine)
2020-09-30	Chiang Mai	Record high minimum temperature	24.9 C (76.8 F)	0.5 C (0.9 F)	58	29 of 100 (Routine)
2020-10-01	Baingoin	Record high minimum temperature	4.8 C (40.6 F)	0.3 C (0.5 F)	58	33 of 100 (Routine)
2020-10-02	Mae Sariang	Record high minimum temperature	24.5 C (76.1 F)	0.3 C (0.5 F)	66	28 of 100 (Routine)
2020-10-06	Mae Sariang	Record high minimum temperature	24.5 C (76.1 F)	0.5 C (0.9 F)	69	30 of 100 (Routine)
2020-10-06	Huili	Record high minimum temperature	18.8 C (65.8 F)	1.0 C (1.8 F)	66	28 of 100 (Routine)
2020-10-06	Dongfang	Record high maximum temperature	34.4 C (93.9 F)	0.3 C (0.5 F)	67	27 of 100 (Routine)
2020-10-08	Mae Sariang	Record high minimum temperature	24.5 C (76.1 F)	0.2 C (0.4 F)	69	28 of 100 (Routine)
2020-10-08	Deqen	Record high maximum temperature	19.6 C (67.3 F)	0.8 C (1.4 F)	65	27 of 100 (Routine)
2020-10-10	Deqen	Record high maximum temperature	20.8 C (69.4 F)	2.7 C (4.9 F)	67	34 of 100 (Routine)
2020-10-10	Gauhati	Record high minimum temperature	26.4 C (79.5 F)	2.4 C (4.3 F)	47	33 of 100 (Routine)
2020-10-11	Tuotuohe	Record high maximum temperature	15.2 C (59.4 F)	2.9 C (5.2 F)	59	29 of 100 (Routine)
2020-10-12	Tuotuohe	Record high maximum temperature	15.3 C (59.5 F)	2.5 C (4.5 F)	59	28 of 100 (Routine)
2020-10-13	Qumarleb	Record high maximum temperature	17.8 C (64.0 F)	3.8 C (6.8 F)	56	30 of 100 (Routine)
2020-10-13	Darlag	Record high maximum temperature	20.0 C (68.0 F)	3.3 C (5.9 F)	59	30 of 100 (Routine)
2020-10-13	Tuotuohe	Record high maximum temperature	15.3 C (59.5 F)	3.2 C (5.8 F)	56	28 of 100 (Routine)
2020-10-13	Qamdo	Record high maximum temperature	26.7 C (80.1 F)	1.0 C (1.8 F)	65	27 of 100 (Routine)
2020-10-15	Xigaze	Record high maximum temperature	22.0 C (71.6 F)	1.2 C (2.2 F)	62	28 of 100 (Routine)
2020-10-17	Mae Sariang	Record high minimum temperature	24.0 C (75.2 F)	0.3 C (0.5 F)	67	29 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 307 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
2.7	67
0.3	58
2.4	47
2.0	63
3.8	56
3.3	59
0.5	69
2.9	59
0.3	67
0.5	58
1.2	62
0.9	63
3.2	56
2.5	59
1.0	66
0.3	66
0.2	69
1.0	65
0.8	65
0.3	67
0.1	69
2.2	46
1.8	56
0.6	65
0.1	67
2.3	49
0.7	59
1.4	56
0.8	58
3.6	39
0.9	59
1.3	58
0.5	59
1.3	46
0.6	41
0.5	59
0.7	59
2.4	46
1.1	56
1.8	49
1.3	47
0.3	62
0.8	59
0.6	58
1.0	45
0.3	50
0.2	51
0.6	53
1.9	46
2.0	46
2.1	46
1.3	46
0.6	56
0.1	59
1.5	33
0.9	47
1.4	46
0.2	56
0.2	56
0.3	56
0.9	47
0.5	47
0.3	17
0.6	46
0.1	52
0.2	51
0.1	16
0.1	16
1.3	43
0.2	52
2.3	35
2.4	35
1.2	32
0.8	39
2.0	20
0.3	41
0.6	46
0.8	45
1.3	46
0.3	46
0.3	46
1.0	39
1.4	36
0.4	47
2.0	35
1.1	37
0.3	49
0.6	10
0.1	46
0.4	45
0.5	46
0.3	12
0.7	33
0.8	32
1.8	22
0.4	46
0.3	46
0.7	41
1.6	37
0.6	39
1.0	36
1.3	36
2.5	29
0.1	13
1.1	37
0.8	39
0.5	39
0.5	35
0.7	31
1.8	19
0.2	38
0.6	46
0.3	39
0.7	36
3.3	17
0.8	36
0.6	0
1.3	20
0.1	39
0.1	37
1.4	25
0.4	39
0.2	5
1.7	22
1.3	26
0.3	39
0.4	36
2.2	17
2.8	17
0.5	35
0.2	35
0.3	37
0.1	36
0.1	36
1.9	9
1.1	22
0.5	27
0.4	37
2.4	13
1.7	17
0.2	36
2.2	19
3.3	13
0.2	32
0.2	32
0.7	22
1.6	11
1.3	22
1.1	26
0.6	22
0.5	24
0.2	32
0.6	28
1.3	17
1.8	17
1.2	20
1.0	22
0.5	25
1.2	9
1.2	10
0.9	25
0.8	14
0.8	9
0.6	19
0.9	4
0.3	23
0.8	25
2.2	13
1.1	15
0.7	22
1.8	13
1.0	17
1.3	17
0.1	24
0.3	25
0.6	19
0.6	17
0.9	10
1.1	11
0.9	15
0.2	32
0.3	24
0.5	25
2.0	13
0.6	22
1.0	17
1.9	13
0.4	21
0.9	17
0.2	17
0.2	17
0.4	15
0.5	10
0.6	10
0.5	15
1.2	7
0.3	20
0.3	19
0.7	17
0.7	17

Margin (C)	Years the old record stood
2.7	67
0.3	58
2.4	47
2.0	63
3.8	56
3.3	59
0.5	69
2.9	59
0.3	67
0.5	58
1.2	62
0.9	63
3.2	56
2.5	59
1.0	66
0.3	66
0.2	69
1.0	65
0.8	65
0.3	67
0.1	69
2.2	46
1.8	56
0.6	65
0.1	67
2.3	49
0.7	59
1.4	56
0.8	58
3.6	39
0.9	59
1.3	58
0.5	59
1.3	46
0.6	41
0.5	59
0.7	59
2.4	46
1.1	56
1.8	49
1.3	47
0.3	62
0.8	59
0.6	58
1.0	45
0.3	50
0.2	51
0.6	53
1.9	46
2.0	46
2.1	46
1.3	46
0.6	56
0.1	59
1.5	33
0.9	47
1.4	46
0.2	56
0.2	56
0.3	56
0.9	47
0.5	47
0.3	17
0.6	46
0.1	52
0.2	51
0.1	16
0.1	16
1.3	43
0.2	52
2.3	35
2.4	35
1.2	32
0.8	39
2.0	20
0.3	41
0.6	46
0.8	45
1.3	46
0.3	46
0.3	46
1.0	39
1.4	36
0.4	47
2.0	35
1.1	37
0.3	49
0.6	10
0.1	46
0.4	45
0.5	46
0.3	12
0.7	33
0.8	32
1.8	22
0.4	46
0.3	46
0.7	41
1.6	37
0.6	39
1.0	36
1.3	36
2.5	29
0.1	13
1.1	37
0.8	39
0.5	39
0.5	35
0.7	31
1.8	19
0.2	38
0.6	46
0.3	39
0.7	36
3.3	17
0.8	36
0.6	0
1.3	20
0.1	39
0.1	37
1.4	25
0.4	39
0.2	5
1.7	22
1.3	26
0.3	39
0.4	36
2.2	17
2.8	17
0.5	35
0.2	35
0.3	37
0.1	36
0.1	36
1.9	9
1.1	22
0.5	27
0.4	37
2.4	13
1.7	17
0.2	36
2.2	19
3.3	13
0.2	32
0.2	32
0.7	22
1.6	11
1.3	22
1.1	26
0.6	22
0.5	24
0.2	32
0.6	28
1.3	17
1.8	17
1.2	20
1.0	22
0.5	25
1.2	9
1.2	10
0.9	25
0.8	14
0.8	9
0.6	19
0.9	4
0.3	23
0.8	25
2.2	13
1.1	15
0.7	22
1.8	13
1.0	17
1.3	17
0.1	24
0.3	25
0.6	19
0.6	17
0.9	10
1.1	11
0.9	15
0.2	32
0.3	24
0.5	25
2.0	13
0.6	22
1.0	17
1.9	13
0.4	21
0.9	17
0.2	17
0.2	17
0.4	15
0.5	10
0.6	10
0.5	15
1.2	7
0.3	20
0.3	19
0.7	17
0.7	17