Heat wave in Japan and 2 other countries, 5 to 11 March 2020

Name: Heat wave in Japan and 2 other countries, 5 to 11 March 2020
Start: 2020-03-05
End: 2020-03-11
Location: Japan, Russia, Korea, North

Heat wave in Japan and 2 other countries, 5 to 11 March 2020: 117 records at 81 stations, peak on 10 March 2020. Closed.

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

Key Facts

Heat wave in Japan and 2 other countries, 5 to 11 March 2020 set or tied 117 station records at 81 stations.
It ran from 5 March 2020 to 11 March 2020 (7 days) and its peak day was 10 March 2020.
Status: closed.
Miyako set a daily record high minimum temperature of 8.5 C (47.3 F) on 10 March 2020.
The busiest day was 10 March 2020 with 47 records.
The oldest broken record in the ranked list had stood for 85 years.

Footprint

5 to 11 March 2020

The area covered by Heat wave in Japan and 2 other countries, 5 to 11 March 2020 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in Japan and 2 other countries, 5 to 11 March 2020: stations that set records in the event
Station	Type	Value	Date
Miyako	Record high minimum temperature	8.5 C (47.3 F)	2020-03-10
Shirakawa	Record high minimum temperature	9.9 C (49.8 F)	2020-03-10
Maebashi	Record high minimum temperature	11.8 C (53.2 F)	2020-03-10
Urakawa	Record high minimum temperature	3.9 C (39.0 F)	2020-03-10
Shinjo	Record high minimum temperature	6.1 C (43.0 F)	2020-03-10
Sendai	Record high minimum temperature	10.6 C (51.1 F)	2020-03-10
Ofunato	Record high minimum temperature	10.4 C (50.7 F)	2020-03-10
Aleksandrovsk-Sahalinskij	Record high minimum temperature	-1.3 C (29.7 F)	2020-03-08
Nikko	Record high minimum temperature	3.2 C (37.8 F)	2020-03-10
Yamagata	Record high minimum temperature	6.3 C (43.3 F)	2020-03-09
Nogliki	Record high maximum temperature	1.3 C (34.3 F)	2020-03-09
Kushiro	Record high minimum temperature	2.0 C (35.6 F)	2020-03-10
Mito	Record high minimum temperature	11.2 C (52.2 F)	2020-03-10
Kawaguchiko	Record high minimum temperature	8.0 C (46.4 F)	2020-03-10
Sovetskaja Gavan	Record high minimum temperature	-3.6 C (25.5 F)	2020-03-08
Ishinomaki	Record high minimum temperature	7.4 C (45.3 F)	2020-03-09
Kofu	Record high minimum temperature	10.8 C (51.4 F)	2020-03-10
Hachinohe	Record high minimum temperature	7.1 C (44.8 F)	2020-03-10
Onahama	Record high minimum temperature	10.7 C (51.3 F)	2020-03-10
Mombetsu	Record high minimum temperature	-0.4 C (31.3 F)	2020-03-10

Records per Day

Peak day 47

Records set or tied each day from 5 March 2020 to 11 March 2020. The most in one day was 47 on 10 March 2020.

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in Japan and 2 other countries, 5 to 11 March 2020 ranked by margin
Miyako, 03-10	7.4 C (13.3 F)
Shirakawa, 03-10	6.6 C (11.9 F)
Maebashi, 03-10	5.7 C (10.3 F)
Kawaguchiko, 03-10	5.1 C (9.2 F)
Mito, 03-10	4.7 C (8.5 F)
Kofu, 03-10	4.6 C (8.3 F)
Shinjo, 03-10	4.3 C (7.7 F)
Urakawa, 03-10	4.0 C (7.2 F)
Onahama, 03-10	3.7 C (6.7 F)
Nikko, 03-10	3.3 C (5.9 F)
Aleksandrovsk-Sahalinskij, 03-08	3.1 C (5.6 F)
Kushiro, 03-10	3.1 C (5.6 F)
Mombetsu, 03-10	2.6 C (4.7 F)
Yamagata, 03-09	2.4 C (4.3 F)
Hachinohe, 03-10	2.2 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

117 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 2 other countries, 5 to 11 March 2020
Margin (C)	Years the old record stood
7.4	69
6.6	69
5.7	60
4.0	69
4.3	62
1.2	54
1.4	54
3.3	69
3.1	67
2.4	61
0.1	85
3.1	65
4.7	41
5.1	45
2.1	61
4.6	45
1.3	67
2.2	58
3.7	41
2.6	61
5.3	16
2.0	58
3.4	34
3.1	64
1.2	69
3.5	34
0.4	69
1.4	61
1.0	60
1.3	60
2.3	40
4.0	43
3.0	43
1.3	54
4.8	12
3.1	43
2.5	34
0.1	61
2.3	41
1.7	43
0.3	62
5.5	11
2.0	43
0.1	58
2.5	28
2.3	26
2.3	35
2.6	34
0.9	41
3.1	43
6.2	1
1.3	42
2.1	34
1.7	43
0.3	45
0.4	10
1.8	31
2.8	18
6.6	1
0.7	43
0.6	43
3.5	5
4.4	26
0.6	40
0.9	34
0.8	34
4.3	26
0.3	43
0.9	30
0.8	43
0.8	43
2.5	11
0.5	30
1.9	18
4.8	12
0.3	25
0.8	31
2.3	5
0.4	29
3.3	5
2.1	11
0.4	26
0.8	26
2.2	5
1.7	12
1.6	12
3.1	1
5.4	1
1.0	12
4.7	3
1.1	11
1.0	16
2.7	12
0.8	12
2.3	1
1.3	5
1.8	7
3.9	4
1.3	5
1.0	5
0.1	16
2.0	1
1.0	7
0.7	5
0.6	7
2.0	1
0.5	5
0.2	7
0.4	4
0.1	7
1.5	1
1.0	1
1.8	1
0.5	1
0.6	1
2.0	1
0.1	3

Compared With Other Events

Station records per event

Station records in Heat wave in Japan and 2 other countries, 5 to 11 March 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 Japan and 2 other countries, 5 to 11 March 2020 (this event)	117 records

Every Record Set

20 of 117

Every record set or tied during Heat wave in Japan and 2 other countries, 5 to 11 March 2020, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2020-03-08	Aleksandrovsk-Sahalinskij	Record high minimum temperature	-1.3 C (29.7 F)	3.1 C (5.6 F)	67	35 of 100 (Notable)
2020-03-08	Sovetskaja Gavan	Record high minimum temperature	-3.6 C (25.5 F)	1.3 C (2.3 F)	67	32 of 100 (Routine)
2020-03-09	Yamagata	Record high minimum temperature	6.3 C (43.3 F)	2.4 C (4.3 F)	61	34 of 100 (Routine)
2020-03-09	Nogliki	Record high maximum temperature	1.3 C (34.3 F)	0.1 C (0.2 F)	85	34 of 100 (Routine)
2020-03-09	Ishinomaki	Record high minimum temperature	7.4 C (45.3 F)	2.1 C (3.8 F)	61	32 of 100 (Routine)
2020-03-10	Miyako	Record high minimum temperature	8.5 C (47.3 F)	7.4 C (13.3 F)	69	52 of 100 (Notable)
2020-03-10	Shirakawa	Record high minimum temperature	9.9 C (49.8 F)	6.6 C (11.9 F)	69	47 of 100 (Notable)
2020-03-10	Maebashi	Record high minimum temperature	11.8 C (53.2 F)	5.7 C (10.3 F)	60	42 of 100 (Notable)
2020-03-10	Urakawa	Record high minimum temperature	3.9 C (39.0 F)	4.0 C (7.2 F)	69	41 of 100 (Notable)
2020-03-10	Shinjo	Record high minimum temperature	6.1 C (43.0 F)	4.3 C (7.7 F)	62	38 of 100 (Notable)
2020-03-10	Sendai	Record high minimum temperature	10.6 C (51.1 F)	1.2 C (2.2 F)	54	37 of 100 (Notable)
2020-03-10	Ofunato	Record high minimum temperature	10.4 C (50.7 F)	1.4 C (2.5 F)	54	36 of 100 (Notable)
2020-03-10	Nikko	Record high minimum temperature	3.2 C (37.8 F)	3.3 C (5.9 F)	69	35 of 100 (Notable)
2020-03-10	Kushiro	Record high minimum temperature	2.0 C (35.6 F)	3.1 C (5.6 F)	65	33 of 100 (Routine)
2020-03-10	Mito	Record high minimum temperature	11.2 C (52.2 F)	4.7 C (8.5 F)	41	33 of 100 (Routine)
2020-03-10	Kawaguchiko	Record high minimum temperature	8.0 C (46.4 F)	5.1 C (9.2 F)	45	33 of 100 (Routine)
2020-03-10	Kofu	Record high minimum temperature	10.8 C (51.4 F)	4.6 C (8.3 F)	45	32 of 100 (Routine)
2020-03-10	Hachinohe	Record high minimum temperature	7.1 C (44.8 F)	2.2 C (4.0 F)	58	31 of 100 (Routine)
2020-03-10	Onahama	Record high minimum temperature	10.7 C (51.3 F)	3.7 C (6.7 F)	41	31 of 100 (Routine)
2020-03-10	Mombetsu	Record high minimum temperature	-0.4 C (31.3 F)	2.6 C (4.7 F)	61	30 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 117 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.

Date	Records
2020-03-05	1
2020-03-06	1
2020-03-07	1
2020-03-08	23
2020-03-09	43
2020-03-10	47
2020-03-11	1

Margin (C)	Years the old record stood
7.4	69
6.6	69
5.7	60
4.0	69
4.3	62
1.2	54
1.4	54
3.3	69
3.1	67
2.4	61
0.1	85
3.1	65
4.7	41
5.1	45
2.1	61
4.6	45
1.3	67
2.2	58
3.7	41
2.6	61
5.3	16
2.0	58
3.4	34
3.1	64
1.2	69
3.5	34
0.4	69
1.4	61
1.0	60
1.3	60
2.3	40
4.0	43
3.0	43
1.3	54
4.8	12
3.1	43
2.5	34
0.1	61
2.3	41
1.7	43
0.3	62
5.5	11
2.0	43
0.1	58
2.5	28
2.3	26
2.3	35
2.6	34
0.9	41
3.1	43
6.2	1
1.3	42
2.1	34
1.7	43
0.3	45
0.4	10
1.8	31
2.8	18
6.6	1
0.7	43
0.6	43
3.5	5
4.4	26
0.6	40
0.9	34
0.8	34
4.3	26
0.3	43
0.9	30
0.8	43
0.8	43
2.5	11
0.5	30
1.9	18
4.8	12
0.3	25
0.8	31
2.3	5
0.4	29
3.3	5
2.1	11
0.4	26
0.8	26
2.2	5
1.7	12
1.6	12
3.1	1
5.4	1
1.0	12
4.7	3
1.1	11
1.0	16
2.7	12
0.8	12
2.3	1
1.3	5
1.8	7
3.9	4
1.3	5
1.0	5
0.1	16
2.0	1
1.0	7
0.7	5
0.6	7
2.0	1
0.5	5
0.2	7
0.4	4
0.1	7
1.5	1
1.0	1
1.8	1
0.5	1
0.6	1
2.0	1
0.1	3

Margin (C)	Years the old record stood
7.4	69
6.6	69
5.7	60
4.0	69
4.3	62
1.2	54
1.4	54
3.3	69
3.1	67
2.4	61
0.1	85
3.1	65
4.7	41
5.1	45
2.1	61
4.6	45
1.3	67
2.2	58
3.7	41
2.6	61
5.3	16
2.0	58
3.4	34
3.1	64
1.2	69
3.5	34
0.4	69
1.4	61
1.0	60
1.3	60
2.3	40
4.0	43
3.0	43
1.3	54
4.8	12
3.1	43
2.5	34
0.1	61
2.3	41
1.7	43
0.3	62
5.5	11
2.0	43
0.1	58
2.5	28
2.3	26
2.3	35
2.6	34
0.9	41
3.1	43
6.2	1
1.3	42
2.1	34
1.7	43
0.3	45
0.4	10
1.8	31
2.8	18
6.6	1
0.7	43
0.6	43
3.5	5
4.4	26
0.6	40
0.9	34
0.8	34
4.3	26
0.3	43
0.9	30
0.8	43
0.8	43
2.5	11
0.5	30
1.9	18
4.8	12
0.3	25
0.8	31
2.3	5
0.4	29
3.3	5
2.1	11
0.4	26
0.8	26
2.2	5
1.7	12
1.6	12
3.1	1
5.4	1
1.0	12
4.7	3
1.1	11
1.0	16
2.7	12
0.8	12
2.3	1
1.3	5
1.8	7
3.9	4
1.3	5
1.0	5
0.1	16
2.0	1
1.0	7
0.7	5
0.6	7
2.0	1
0.5	5
0.2	7
0.4	4
0.1	7
1.5	1
1.0	1
1.8	1
0.5	1
0.6	1
2.0	1
0.1	3