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Data as of 2026-10-12
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Built 2026-10-14 (14 October 2026)

Heat wave in Japan and 3 other countries, 21 January to 1 February 2020

Heat wave in Japan and 3 other countries, 21 January to 1 February 2020: 290 records at 144 stations, peak on 23 January 2020. Closed.

Data as of . Last revised (2026-10-12).

Key Facts

  • Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 set or tied 290 station records at 144 stations.
  • It ran from 21 January 2020 to 1 February 2020 (12 days) and its peak day was 23 January 2020.
  • Status: closed.
  • Tottori set a daily record high minimum temperature of 7.9 C (46.2 F) on 23 January 2020.
  • The busiest day was 23 January 2020 with 92 records.
  • The oldest broken record in the ranked list had stood for 68 years.

Footprint

21 January to 1 February 2020
Footprint of Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 The area covered by Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 is outlined, with 20 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Japan and 3 other countries, 21 January to 1 February 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 3 other countries, 21 January to 1 February 2020: stations that set records in the event
StationTypeValueDate
TottoriRecord high minimum temperature7.9 C (46.2 F)2020-01-23
TakadaRecord high minimum temperature5.9 C (42.6 F)2020-01-28
MatsueRecord high minimum temperature7.6 C (45.7 F)2020-01-23
NiigataRecord high minimum temperature4.1 C (39.4 F)2020-01-23
MatsumotoRecord high minimum temperature4.1 C (39.4 F)2020-01-23
WajimaRecord high minimum temperature7.4 C (45.3 F)2020-01-28
TakayamaRecord high maximum temperature15.9 C (60.6 F)2020-01-28
MishimaRecord high minimum temperature8.2 C (46.8 F)2020-01-23
TadotsuRecord high minimum temperature7.4 C (45.3 F)2020-01-23
TsuyamaRecord high minimum temperature4.3 C (39.7 F)2020-01-23
HiradoRecord high minimum temperature12.4 C (54.3 F)2020-01-23
HiroshimaRecord high maximum temperature16.0 C (60.8 F)2020-01-24
ToyamaRecord high minimum temperature5.9 C (42.6 F)2020-01-23
FukuiRecord high minimum temperature6.8 C (44.2 F)2020-01-23
WakayamaRecord high minimum temperature8.0 C (46.4 F)2020-01-23
TokushimaRecord high minimum temperature7.5 C (45.5 F)2020-01-23
GifuRecord high maximum temperature16.3 C (61.3 F)2020-01-24
NazeRecord high minimum temperature18.4 C (65.1 F)2020-01-26
FushikiRecord high minimum temperature6.2 C (43.2 F)2020-01-23
ShizuokaRecord high maximum temperature19.1 C (66.4 F)2020-01-29

Records per Day

Peak day 92
Records per day during Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 Records set or tied each day from 21 January 2020 to 1 February 2020. The most in one day was 92 on 23 January 2020. 0 25 50 75 100 01-2101-2301-2501-2701-2901-31
Records set or tied each day from 21 January 2020 to 1 February 2020. The most in one day was 92 on 23 January 2020.
Records per day during Heat wave in Japan and 3 other countries, 21 January to 1 February 2020
DateRecords
2020-01-211
2020-01-226
2020-01-2392
2020-01-2447
2020-01-255
2020-01-2620
2020-01-2714
2020-01-2842
2020-01-2935
2020-01-3024
2020-01-313
2020-02-011

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 ranked by margin
Takayama, 01-285.3 C (9.5 F)
Matsumoto, 01-235.1 C (9.2 F)
Tottori, 01-234.2 C (7.6 F)
Fukui, 01-233.8 C (6.8 F)
Takada, 01-283.7 C (6.7 F)
Wajima, 01-283.7 C (6.7 F)
Gifu, 01-243.5 C (6.3 F)
Matsue, 01-233.3 C (5.9 F)
Hirado, 01-233.3 C (5.9 F)
Mishima, 01-232.9 C (5.2 F)
Toyama, 01-232.8 C (5.0 F)
Naze, 01-262.7 C (4.9 F)
Hiroshima, 01-242.5 C (4.5 F)
Wakayama, 01-232.5 C (4.5 F)
Fushiki, 01-232.4 C (4.3 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 Japan and 3 other countries, 21 January to 1 February 2020 290 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 0.01.53.04.56.0 Margin (C) Years the old record stood
290 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 3 other countries, 21 January to 1 February 2020
Margin (C)Years the old record stood
4.268
3.762
3.365
2.268
5.156
3.740
5.340
2.964
1.966
2.065
2.560
3.350
2.848
3.830
3.546
2.550
1.564
2.750
2.448
1.861
2.354
1.865
2.962
2.657
2.552
1.364
0.962
1.365
2.546
2.950
2.760
2.148
2.650
1.462
2.046
3.830
3.146
1.756
4.040
4.152
2.356
1.162
1.062
1.648
1.648
1.848
2.146
1.060
3.130
2.246
0.732
2.446
2.248
1.750
0.730
0.762
0.560
1.944
1.640
1.846
3.228
1.252
1.750
2.830
2.152
1.931
5.313
0.660
1.540
2.632
1.250
2.932
2.832
2.332
1.246
0.950
2.036
2.928
1.146
0.756
1.740
1.150
3.230
1.646
1.546
1.250
1.748
1.050
0.232
1.546
1.256
4.732
2.040
1.240
3.228
0.650
3.330
0.750
0.952
0.550
0.650
0.848
1.246
1.248
0.952
3.420
2.532
2.444
3.136
1.356
3.440
3.240
1.540
0.846
1.240
1.836
1.040
2.332
1.240
0.846
2.232
0.450
1.536
1.930
1.734
2.130
2.232
0.750
0.848
0.450
1.052
1.940
0.849
0.546
2.226
0.152
1.240
0.150
0.840
0.346
1.932
0.150
2.320
0.150
1.040
0.348
0.446
1.830
0.250
0.450
0.446
0.418
0.150
0.446
0.346
1.830
0.848
1.840
0.156
1.640
0.644
0.744
0.640
1.236
0.146
1.036
1.730
2.329
0.640
0.146
0.746
0.740
0.346
0.346
0.248
1.340
0.344
0.246
0.448
1.340
0.352
0.946
0.449
0.744
0.540
0.736
0.636
1.232
0.540
1.230
0.446
1.130
0.352
1.230
2.920
1.630
1.632
1.840
0.440
4.05

Compared With Other Events

Station records per event
Station records in Heat wave in Japan and 3 other countries, 21 January to 1 February 2020 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 Japan and 3 other countries, 21 January to 1 February 2020 (this event)290 records

Every Record Set

20 of 290
Every record set or tied during Heat wave in Japan and 3 other countries, 21 January to 1 February 2020, in date order
DateStationRecordValueMarginYears stoodSignificance
2020-01-23TottoriRecord high minimum temperature7.9 C (46.2 F)4.2 C (7.6 F)6844 of 100 (Notable)
2020-01-23MatsueRecord high minimum temperature7.6 C (45.7 F)3.3 C (5.9 F)6539 of 100 (Notable)
2020-01-23NiigataRecord high minimum temperature4.1 C (39.4 F)2.2 C (4.0 F)6837 of 100 (Notable)
2020-01-23MatsumotoRecord high minimum temperature4.1 C (39.4 F)5.1 C (9.2 F)5637 of 100 (Notable)
2020-01-23MishimaRecord high minimum temperature8.2 C (46.8 F)2.9 C (5.2 F)6434 of 100 (Routine)
2020-01-23TadotsuRecord high minimum temperature7.4 C (45.3 F)1.9 C (3.4 F)6634 of 100 (Routine)
2020-01-23TsuyamaRecord high minimum temperature4.3 C (39.7 F)2.0 C (3.6 F)6533 of 100 (Routine)
2020-01-23HiradoRecord high minimum temperature12.4 C (54.3 F)3.3 C (5.9 F)5033 of 100 (Routine)
2020-01-23ToyamaRecord high minimum temperature5.9 C (42.6 F)2.8 C (5.0 F)4832 of 100 (Routine)
2020-01-23FukuiRecord high minimum temperature6.8 C (44.2 F)3.8 C (6.8 F)3032 of 100 (Routine)
2020-01-23WakayamaRecord high minimum temperature8.0 C (46.4 F)2.5 C (4.5 F)5032 of 100 (Routine)
2020-01-23TokushimaRecord high minimum temperature7.5 C (45.5 F)1.5 C (2.7 F)6432 of 100 (Routine)
2020-01-23FushikiRecord high minimum temperature6.2 C (43.2 F)2.4 C (4.3 F)4831 of 100 (Routine)
2020-01-24HiroshimaRecord high maximum temperature16.0 C (60.8 F)2.5 C (4.5 F)6033 of 100 (Routine)
2020-01-24GifuRecord high maximum temperature16.3 C (61.3 F)3.5 C (6.3 F)4632 of 100 (Routine)
2020-01-26NazeRecord high minimum temperature18.4 C (65.1 F)2.7 C (4.9 F)5032 of 100 (Routine)
2020-01-28TakadaRecord high minimum temperature5.9 C (42.6 F)3.7 C (6.7 F)6241 of 100 (Notable)
2020-01-28WajimaRecord high minimum temperature7.4 C (45.3 F)3.7 C (6.7 F)4035 of 100 (Notable)
2020-01-28TakayamaRecord high maximum temperature15.9 C (60.6 F)5.3 C (9.5 F)4035 of 100 (Notable)
2020-01-29ShizuokaRecord high maximum temperature19.1 C (66.4 F)1.8 C (3.2 F)6131 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 290 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 2026-10-12. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.