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Heat wave in Japan and 3 other countries, 15 to 18 January 2018

Heat wave in Japan and 3 other countries, 15 to 18 January 2018: 115 records at 90 stations, peak on 17 January 2018. Closed.

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

Key Facts

  • Heat wave in Japan and 3 other countries, 15 to 18 January 2018 set or tied 115 station records at 90 stations.
  • It ran from 15 January 2018 to 18 January 2018 (4 days) and its peak day was 17 January 2018.
  • Status: closed.
  • Oita set a monthly record high maximum temperature of 20.4 C (68.7 F) on 17 January 2018.
  • The busiest day was 18 January 2018 with 33 records.
  • The oldest broken record in the ranked list had stood for 64 years.

Footprint

15 to 18 January 2018
Footprint of Heat wave in Japan and 3 other countries, 15 to 18 January 2018 The area covered by Heat wave in Japan and 3 other countries, 15 to 18 January 2018 is outlined, with 19 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Japan and 3 other countries, 15 to 18 January 2018 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 3 other countries, 15 to 18 January 2018: stations that set records in the event
StationTypeValueDate
OitaRecord high maximum temperature20.4 C (68.7 F)2018-01-17
NikkoRecord high minimum temperature-1.0 C (30.2 F)2018-01-17
AkitaRecord high minimum temperature2.6 C (36.7 F)2018-01-16
SuwaRecord high minimum temperature2.3 C (36.1 F)2018-01-17
HamamatsuRecord high minimum temperature8.5 C (47.3 F)2018-01-17
MoriokaRecord high minimum temperature0.1 C (32.2 F)2018-01-17
KagoshimaRecord high maximum temperature20.1 C (68.2 F)2018-01-17
MaebashiRecord high maximum temperature14.7 C (58.5 F)2018-01-18
HikoneRecord high maximum temperature12.4 C (54.3 F)2018-01-18
NaraRecord high maximum temperature13.6 C (56.5 F)2018-01-18
TadotsuRecord high maximum temperature14.5 C (58.1 F)2018-01-18
HitoyoshiRecord high maximum temperature17.0 C (62.6 F)2018-01-17
MiyakonojoRecord high maximum temperature18.7 C (65.7 F)2018-01-17
OfunatoRecord high minimum temperature3.1 C (37.6 F)2018-01-17
UtsunomiyaRecord high minimum temperature1.2 C (34.2 F)2018-01-17
UenoRecord high minimum temperature5.5 C (41.9 F)2018-01-17
MishimaRecord high minimum temperature6.7 C (44.1 F)2018-01-17
KofuRecord high maximum temperature15.0 C (59.0 F)2018-01-18
ChibaRecord high minimum temperature5.2 C (41.4 F)2018-01-18

Records per Day

Peak day 32
Records per day during Heat wave in Japan and 3 other countries, 15 to 18 January 2018 Records set or tied each day from 15 January 2018 to 18 January 2018. The most in one day was 33 on 18 January 2018. 0 10 20 30 40 01-1501-1601-1701-18
Records set or tied each day from 15 January 2018 to 18 January 2018. The most in one day was 33 on 18 January 2018.
Records per day during Heat wave in Japan and 3 other countries, 15 to 18 January 2018
DateRecords
2018-01-1519
2018-01-1631
2018-01-1732
2018-01-1833

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Japan and 3 other countries, 15 to 18 January 2018 ranked by margin
Suwa, 01-172.6 C (4.7 F)
Morioka, 01-182.1 C (3.8 F)
Nikko, 01-172.0 C (3.6 F)
Maebashi, 01-181.7 C (3.1 F)
Akita, 01-161.4 C (2.5 F)
Ofunato, 01-171.4 C (2.5 F)
Kofu, 01-181.3 C (2.3 F)
Chiba, 01-181.2 C (2.2 F)
Hamamatsu, 01-171.0 C (1.8 F)
Morioka, 01-170.9 C (1.6 F)
Kagoshima, 01-170.8 C (1.4 F)
Ueno, 01-170.8 C (1.4 F)
Utsunomiya, 01-170.7 C (1.3 F)
Mishima, 01-170.6 C (1.1 F)
Hikone, 01-180.3 C (0.5 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, 15 to 18 January 2018 115 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 0.02.04.06.08.0 Margin (C) Years the old record stood
115 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, 15 to 18 January 2018
Margin (C)Years the old record stood
0.158
2.064
1.460
2.654
1.064
2.147
0.964
0.864
1.750
0.364
0.364
0.364
0.164
0.164
1.447
0.754
1.347
0.854
0.658
1.247
0.854
1.452
1.252
0.848
0.554
0.554
2.330
1.050
0.948
0.452
1.342
1.044
3.039
0.547
0.448
1.731
0.152
0.547
0.247
0.248
0.347
1.731
1.631
0.742
6.63
1.544
1.830
0.144
0.144
1.331
1.231
1.335
1.720
2.022
2.816
1.031
0.631
1.624
0.731
1.524
0.130
0.144
0.244
1.822
1.020
0.430
1.424
0.927
1.022
0.330
0.527
1.516
0.127
1.120
0.820
0.228
0.620
0.824
1.516
1.716
0.918
1.914
0.522
0.520
1.016
1.116
1.316
0.324
0.224
0.431
1.78
0.122
0.911
0.916
0.220
0.320
0.419
0.716
1.216
0.816
1.712
0.516
0.516
0.515
0.214
0.216
0.116
0.611
0.216
0.712
0.68
0.712
1.22
0.13
0.66

Compared With Other Events

Station records per event
Station records in Heat wave in Japan and 3 other countries, 15 to 18 January 2018 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, 15 to 18 January 2018 (this event)115 records

Every Record Set

20 of 115
Every record set or tied during Heat wave in Japan and 3 other countries, 15 to 18 January 2018, in date order
DateStationRecordValueMarginYears stoodSignificance
2018-01-16AkitaRecord high minimum temperature2.6 C (36.7 F)1.4 C (2.5 F)6029 of 100 (Routine)
2018-01-17OitaRecord high maximum temperature20.4 C (68.7 F)0.1 C (0.2 F)5833 of 100 (Routine)
2018-01-17NikkoRecord high minimum temperature-1.0 C (30.2 F)2.0 C (3.6 F)6431 of 100 (Routine)
2018-01-17SuwaRecord high minimum temperature2.3 C (36.1 F)2.6 C (4.7 F)5428 of 100 (Routine)
2018-01-17HamamatsuRecord high minimum temperature8.5 C (47.3 F)1.0 C (1.8 F)6428 of 100 (Routine)
2018-01-17MoriokaRecord high minimum temperature0.1 C (32.2 F)0.9 C (1.6 F)6427 of 100 (Routine)
2018-01-17KagoshimaRecord high maximum temperature20.1 C (68.2 F)0.8 C (1.4 F)6427 of 100 (Routine)
2018-01-17HitoyoshiRecord high maximum temperature17.0 C (62.6 F)0.1 C (0.2 F)6425 of 100 (Routine)
2018-01-17MiyakonojoRecord high maximum temperature18.7 C (65.7 F)0.1 C (0.2 F)6425 of 100 (Routine)
2018-01-17OfunatoRecord high minimum temperature3.1 C (37.6 F)1.4 C (2.5 F)4724 of 100 (Routine)
2018-01-17UtsunomiyaRecord high minimum temperature1.2 C (34.2 F)0.7 C (1.3 F)5424 of 100 (Routine)
2018-01-17UenoRecord high minimum temperature5.5 C (41.9 F)0.8 C (1.4 F)5424 of 100 (Routine)
2018-01-17MishimaRecord high minimum temperature6.7 C (44.1 F)0.6 C (1.1 F)5824 of 100 (Routine)
2018-01-18MoriokaRecord high maximum temperature8.0 C (46.4 F)2.1 C (3.8 F)4727 of 100 (Routine)
2018-01-18MaebashiRecord high maximum temperature14.7 C (58.5 F)1.7 C (3.1 F)5026 of 100 (Routine)
2018-01-18HikoneRecord high maximum temperature12.4 C (54.3 F)0.3 C (0.5 F)6426 of 100 (Routine)
2018-01-18NaraRecord high maximum temperature13.6 C (56.5 F)0.3 C (0.5 F)6426 of 100 (Routine)
2018-01-18TadotsuRecord high maximum temperature14.5 C (58.1 F)0.3 C (0.5 F)6426 of 100 (Routine)
2018-01-18KofuRecord high maximum temperature15.0 C (59.0 F)1.3 C (2.3 F)4724 of 100 (Routine)
2018-01-18ChibaRecord high minimum temperature5.2 C (41.4 F)1.2 C (2.2 F)4724 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 115 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.