Heat wave in Japan and 6 other countries, 23 February to 14 March 2025

Name: Heat wave in Japan and 6 other countries, 23 February to 14 March 2025
Start: 2025-02-23
End: 2025-03-14
Location: Japan, China, Mongolia, Russia, Korea, North, Korea, South, Vietnam

Heat wave in Japan and 6 other countries, 23 February to 14 March 2025: 720 records at 301 stations, peak on 12 March 2025. Closed.

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

Key Facts

Heat wave in Japan and 6 other countries, 23 February to 14 March 2025 set or tied 720 station records at 301 stations.
It ran from 23 February 2025 to 14 March 2025 (20 days) and its peak day was 12 March 2025.
Status: closed.
Timiryazevskij set a monthly record high maximum temperature of 14.2 C (57.6 F) on 28 February 2025.
The busiest day was 12 March 2025 with 124 records.
The oldest broken record in the ranked list had stood for 88 years.

Footprint

23 February to 14 March 2025

The area covered by Heat wave in Japan and 6 other countries, 23 February to 14 March 2025 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in Japan and 6 other countries, 23 February to 14 March 2025: stations that set records in the event
Station	Type	Value	Date
Timiryazevskij	Record high maximum temperature	14.2 C (57.6 F)	2025-02-28
Poset	Record high maximum temperature	13.3 C (55.9 F)	2025-02-28
Zhijiang	Record high minimum temperature	19.1 C (66.4 F)	2025-03-01
Huili	Record high minimum temperature	14.0 C (57.2 F)	2025-03-02
Suttsu	Record high minimum temperature	5.6 C (42.1 F)	2025-03-12
Tongliao	Record high minimum temperature	2.1 C (35.8 F)	2025-02-27
Huoshan	Record high minimum temperature	20.7 C (69.3 F)	2025-03-01
Miyazaki	Record high maximum temperature	27.1 C (80.8 F)	2025-03-02
Naze	Record high minimum temperature	22.4 C (72.3 F)	2025-03-03
Ofunato	Record high minimum temperature	8.9 C (48.0 F)	2025-03-12
Bulgan	Record high minimum temperature	-6.3 C (20.7 F)	2025-02-26
Tianjin	Record high minimum temperature	7.0 C (44.6 F)	2025-02-28
Guanghua	Record high minimum temperature	13.1 C (55.6 F)	2025-03-01
Kure Reg Met HQ	Record high minimum temperature	10.0 C (50.0 F)	2025-03-01
Omaezaki	Record high minimum temperature	14.5 C (58.1 F)	2025-03-02
Mokpo	Record high maximum temperature	16.7 C (62.1 F)	2025-03-02
Esashi	Record high minimum temperature	6.6 C (43.9 F)	2025-03-11
Sapporo	Record high maximum temperature	11.3 C (52.3 F)	2025-03-12
Niigata	Record high minimum temperature	9.1 C (48.4 F)	2025-03-12

Records per Day

Peak day 124

Records set or tied each day from 23 February 2025 to 14 March 2025. The most in one day was 124 on 12 March 2025.

Records per day during Heat wave in Japan and 6 other countries, 23 February to 14 March 2025
Date	Records
2025-02-23	2
2025-02-24	2
2025-02-25	19
2025-02-26	16
2025-02-27	46
2025-02-28	23
2025-03-01	111
2025-03-02	112
2025-03-03	23
2025-03-04	9
2025-03-05	2
2025-03-06	3
2025-03-07	7
2025-03-08	21
2025-03-09	29
2025-03-10	55
2025-03-11	74
2025-03-12	124
2025-03-13	37
2025-03-14	5

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in Japan and 6 other countries, 23 February to 14 March 2025 ranked by margin
Huoshan, 03-01	7.0 C (12.6 F)
Zhijiang, 03-01	6.1 C (11.0 F)
Ofunato, 03-12	4.8 C (8.6 F)
Miyazaki, 03-02	4.5 C (8.1 F)
Guanghua, 03-01	4.4 C (7.9 F)
Huili, 03-02	3.8 C (6.8 F)
Tianjin, 02-28	3.6 C (6.5 F)
Sapporo, 03-12	3.6 C (6.5 F)
Kure Reg Met HQ, 03-01	3.6 C (6.5 F)
Suttsu, 03-12	3.4 C (6.1 F)
Omaezaki, 03-02	3.2 C (5.8 F)
Esashi, 03-11	3.0 C (5.4 F)
Niigata, 03-12	2.8 C (5.0 F)
Esashi, 03-12	2.6 C (4.7 F)
Tongliao, 02-27	2.1 C (3.8 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

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 Japan and 6 other countries, 23 February to 14 March 2025
Margin (C)	Years the old record stood
1.4	72
2.0	65
6.1	59
3.8	64
3.4	67
2.1	59
7.0	48
4.8	48
4.5	62
0.4	65
3.6	64
4.4	59
3.6	64
2.6	67
3.0	66
2.8	64
3.2	72
3.6	64
0.2	88
1.1	63
2.6	64
3.5	71
2.8	72
0.7	58
2.7	64
2.4	71
1.8	72
1.8	74
2.1	72
1.8	72
2.0	72
3.2	62
3.9	59
2.3	67
3.3	56
1.2	72
2.0	64
2.5	64
0.1	55
2.9	59
2.3	64
2.0	64
2.2	64
2.7	64
2.0	72
1.9	72
3.6	59
2.4	64
2.5	64
8.1	32
4.2	62
2.4	64
1.8	64
1.6	66
2.8	64
1.2	72
1.7	72
1.5	72
2.5	64
1.5	70
2.5	59
1.0	74
1.6	72
1.5	72
5.0	52
1.8	67
2.7	59
4.7	59
1.9	64
0.6	74
2.1	66
0.7	74
2.0	71
1.8	64
2.3	64
1.2	72
1.9	64
1.2	72
1.1	72
2.0	64
2.6	59
1.1	72
1.1	70
3.7	54
2.7	59
1.1	70
2.0	64
2.8	62
2.7	59
0.6	72
0.5	41
3.8	48
3.0	62
1.5	64
1.6	64
1.7	64
2.4	59
1.5	67
0.8	70
1.2	64
1.4	64
0.9	72
1.8	64
1.5	64
0.7	72
0.3	74
0.8	72
0.8	72
5.1	42
1.0	72
1.5	64
0.8	72
1.9	59
4.8	36
5.5	48
4.2	57
3.1	48
0.1	74
0.8	67
3.0	59
3.1	59
1.4	56
1.2	64
0.2	74
1.0	64
1.2	64
1.5	64
0.7	72
0.9	64
0.6	72
0.6	72
0.5	70
0.5	72
2.4	48
0.5	72
1.2	64
1.4	64
0.5	70
1.2	64
0.6	72
2.2	59
1.9	59
0.8	67
5.2	47
2.5	62
0.8	64
0.5	64
1.3	64
0.9	59
4.0	50
3.0	19
0.6	67
0.3	71
0.2	70
2.3	48
2.2	62
2.7	59
0.3	71
0.1	70
3.0	35
1.0	64
1.2	59
2.1	48
0.9	64
0.6	64
2.4	59
0.8	64
0.2	70
0.1	72
0.3	72
0.1	72
0.8	64
2.6	50
0.3	72
0.8	64
1.6	59
1.6	59
0.1	72
1.4	59
0.2	72
1.2	63
1.5	59
0.5	67
4.9	30
1.3	64
2.4	59
2.2	64
1.2	64
4.8	36
2.5	59
2.5	59
0.5	64
1.5	62
0.5	64
0.7	64
3.8	32
0.4	64
0.4	64
0.4	64
0.7	64

Compared With Other Events

Station records per event

Station records in Heat wave in Japan and 6 other countries, 23 February to 14 March 2025 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 Japan and 6 other countries, 23 February to 14 March 2025 (this event)	720 records

Every Record Set

20 of 720

Every record set or tied during Heat wave in Japan and 6 other countries, 23 February to 14 March 2025, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2025-02-26	Bulgan	Record high minimum temperature	-6.3 C (20.7 F)	1.1 C (2.0 F)	63	36 of 100 (Notable)
2025-02-27	Tongliao	Record high minimum temperature	2.1 C (35.8 F)	2.1 C (3.8 F)	59	38 of 100 (Notable)
2025-02-28	Timiryazevskij	Record high maximum temperature	14.2 C (57.6 F)	1.4 C (2.5 F)	72	43 of 100 (Notable)
2025-02-28	Poset	Record high maximum temperature	13.3 C (55.9 F)	2.0 C (3.6 F)	65	42 of 100 (Notable)
2025-02-28	Tianjin	Record high minimum temperature	7.0 C (44.6 F)	3.6 C (6.5 F)	64	36 of 100 (Notable)
2025-03-01	Zhijiang	Record high minimum temperature	19.1 C (66.4 F)	6.1 C (11.0 F)	59	40 of 100 (Notable)
2025-03-01	Huoshan	Record high minimum temperature	20.7 C (69.3 F)	7.0 C (12.6 F)	48	38 of 100 (Notable)
2025-03-01	Guanghua	Record high minimum temperature	13.1 C (55.6 F)	4.4 C (7.9 F)	59	36 of 100 (Notable)
2025-03-01	Kure Reg Met HQ	Record high minimum temperature	10.0 C (50.0 F)	3.6 C (6.5 F)	64	36 of 100 (Notable)
2025-03-02	Huili	Record high minimum temperature	14.0 C (57.2 F)	3.8 C (6.8 F)	64	39 of 100 (Notable)
2025-03-02	Miyazaki	Record high maximum temperature	27.1 C (80.8 F)	4.5 C (8.1 F)	62	37 of 100 (Notable)
2025-03-02	Omaezaki	Record high minimum temperature	14.5 C (58.1 F)	3.2 C (5.8 F)	72	36 of 100 (Notable)
2025-03-02	Mokpo	Record high maximum temperature	16.7 C (62.1 F)	0.2 C (0.4 F)	88	36 of 100 (Notable)
2025-03-03	Naze	Record high minimum temperature	22.4 C (72.3 F)	0.4 C (0.7 F)	65	37 of 100 (Notable)
2025-03-11	Esashi	Record high minimum temperature	6.6 C (43.9 F)	3.0 C (5.4 F)	66	36 of 100 (Notable)
2025-03-12	Suttsu	Record high minimum temperature	5.6 C (42.1 F)	3.4 C (6.1 F)	67	39 of 100 (Notable)
2025-03-12	Ofunato	Record high minimum temperature	8.9 C (48.0 F)	4.8 C (8.6 F)	48	37 of 100 (Notable)
2025-03-12	Sapporo	Record high maximum temperature	11.3 C (52.3 F)	3.6 C (6.5 F)	64	36 of 100 (Notable)
2025-03-12	Esashi	Record high minimum temperature	5.4 C (41.7 F)	2.6 C (4.7 F)	67	36 of 100 (Notable)
2025-03-12	Niigata	Record high minimum temperature	9.1 C (48.4 F)	2.8 C (5.0 F)	64	36 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 720 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
1.4	72
2.0	65
6.1	59
3.8	64
3.4	67
2.1	59
7.0	48
4.8	48
4.5	62
0.4	65
3.6	64
4.4	59
3.6	64
2.6	67
3.0	66
2.8	64
3.2	72
3.6	64
0.2	88
1.1	63
2.6	64
3.5	71
2.8	72
0.7	58
2.7	64
2.4	71
1.8	72
1.8	74
2.1	72
1.8	72
2.0	72
3.2	62
3.9	59
2.3	67
3.3	56
1.2	72
2.0	64
2.5	64
0.1	55
2.9	59
2.3	64
2.0	64
2.2	64
2.7	64
2.0	72
1.9	72
3.6	59
2.4	64
2.5	64
8.1	32
4.2	62
2.4	64
1.8	64
1.6	66
2.8	64
1.2	72
1.7	72
1.5	72
2.5	64
1.5	70
2.5	59
1.0	74
1.6	72
1.5	72
5.0	52
1.8	67
2.7	59
4.7	59
1.9	64
0.6	74
2.1	66
0.7	74
2.0	71
1.8	64
2.3	64
1.2	72
1.9	64
1.2	72
1.1	72
2.0	64
2.6	59
1.1	72
1.1	70
3.7	54
2.7	59
1.1	70
2.0	64
2.8	62
2.7	59
0.6	72
0.5	41
3.8	48
3.0	62
1.5	64
1.6	64
1.7	64
2.4	59
1.5	67
0.8	70
1.2	64
1.4	64
0.9	72
1.8	64
1.5	64
0.7	72
0.3	74
0.8	72
0.8	72
5.1	42
1.0	72
1.5	64
0.8	72
1.9	59
4.8	36
5.5	48
4.2	57
3.1	48
0.1	74
0.8	67
3.0	59
3.1	59
1.4	56
1.2	64
0.2	74
1.0	64
1.2	64
1.5	64
0.7	72
0.9	64
0.6	72
0.6	72
0.5	70
0.5	72
2.4	48
0.5	72
1.2	64
1.4	64
0.5	70
1.2	64
0.6	72
2.2	59
1.9	59
0.8	67
5.2	47
2.5	62
0.8	64
0.5	64
1.3	64
0.9	59
4.0	50
3.0	19
0.6	67
0.3	71
0.2	70
2.3	48
2.2	62
2.7	59
0.3	71
0.1	70
3.0	35
1.0	64
1.2	59
2.1	48
0.9	64
0.6	64
2.4	59
0.8	64
0.2	70
0.1	72
0.3	72
0.1	72
0.8	64
2.6	50
0.3	72
0.8	64
1.6	59
1.6	59
0.1	72
1.4	59
0.2	72
1.2	63
1.5	59
0.5	67
4.9	30
1.3	64
2.4	59
2.2	64
1.2	64
4.8	36
2.5	59
2.5	59
0.5	64
1.5	62
0.5	64
0.7	64
3.8	32
0.4	64
0.4	64
0.4	64
0.7	64

Margin (C)	Years the old record stood
1.4	72
2.0	65
6.1	59
3.8	64
3.4	67
2.1	59
7.0	48
4.8	48
4.5	62
0.4	65
3.6	64
4.4	59
3.6	64
2.6	67
3.0	66
2.8	64
3.2	72
3.6	64
0.2	88
1.1	63
2.6	64
3.5	71
2.8	72
0.7	58
2.7	64
2.4	71
1.8	72
1.8	74
2.1	72
1.8	72
2.0	72
3.2	62
3.9	59
2.3	67
3.3	56
1.2	72
2.0	64
2.5	64
0.1	55
2.9	59
2.3	64
2.0	64
2.2	64
2.7	64
2.0	72
1.9	72
3.6	59
2.4	64
2.5	64
8.1	32
4.2	62
2.4	64
1.8	64
1.6	66
2.8	64
1.2	72
1.7	72
1.5	72
2.5	64
1.5	70
2.5	59
1.0	74
1.6	72
1.5	72
5.0	52
1.8	67
2.7	59
4.7	59
1.9	64
0.6	74
2.1	66
0.7	74
2.0	71
1.8	64
2.3	64
1.2	72
1.9	64
1.2	72
1.1	72
2.0	64
2.6	59
1.1	72
1.1	70
3.7	54
2.7	59
1.1	70
2.0	64
2.8	62
2.7	59
0.6	72
0.5	41
3.8	48
3.0	62
1.5	64
1.6	64
1.7	64
2.4	59
1.5	67
0.8	70
1.2	64
1.4	64
0.9	72
1.8	64
1.5	64
0.7	72
0.3	74
0.8	72
0.8	72
5.1	42
1.0	72
1.5	64
0.8	72
1.9	59
4.8	36
5.5	48
4.2	57
3.1	48
0.1	74
0.8	67
3.0	59
3.1	59
1.4	56
1.2	64
0.2	74
1.0	64
1.2	64
1.5	64
0.7	72
0.9	64
0.6	72
0.6	72
0.5	70
0.5	72
2.4	48
0.5	72
1.2	64
1.4	64
0.5	70
1.2	64
0.6	72
2.2	59
1.9	59
0.8	67
5.2	47
2.5	62
0.8	64
0.5	64
1.3	64
0.9	59
4.0	50
3.0	19
0.6	67
0.3	71
0.2	70
2.3	48
2.2	62
2.7	59
0.3	71
0.1	70
3.0	35
1.0	64
1.2	59
2.1	48
0.9	64
0.6	64
2.4	59
0.8	64
0.2	70
0.1	72
0.3	72
0.1	72
0.8	64
2.6	50
0.3	72
0.8	64
1.6	59
1.6	59
0.1	72
1.4	59
0.2	72
1.2	63
1.5	59
0.5	67
4.9	30
1.3	64
2.4	59
2.2	64
1.2	64
4.8	36
2.5	59
2.5	59
0.5	64
1.5	62
0.5	64
0.7	64
3.8	32
0.4	64
0.4	64
0.4	64
0.7	64