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Built 2026-10-14 (14 October 2026)

Heat wave in Japan, 5 to 10 October 2018

Heat wave in Japan, 5 to 10 October 2018: 117 records at 83 stations, peak on 6 October 2018. Closed.

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

Key Facts

  • Heat wave in Japan, 5 to 10 October 2018 set or tied 117 station records at 83 stations.
  • It ran from 5 October 2018 to 10 October 2018 (6 days) and its peak day was 6 October 2018.
  • Status: closed.
  • Choshi set a monthly record high maximum temperature of 30.6 C (87.1 F) on 7 October 2018.
  • The busiest day was 6 October 2018 with 61 records.
  • The oldest broken record in the ranked list had stood for 80 years.

Footprint

5 to 10 October 2018
Footprint of Heat wave in Japan, 5 to 10 October 2018 The area covered by Heat wave in Japan, 5 to 10 October 2018 is outlined, with 20 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Japan, 5 to 10 October 2018 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, 5 to 10 October 2018: stations that set records in the event
StationTypeValueDate
ChoshiRecord high maximum temperature30.6 C (87.1 F)2018-10-07
SaigoRecord high maximum temperature29.5 C (85.1 F)2018-10-06
ShizuokaRecord high maximum temperature33.7 C (92.7 F)2018-10-07
AkitaRecord high maximum temperature30.1 C (86.2 F)2018-10-06
FukuiRecord high maximum temperature31.7 C (89.1 F)2018-10-06
KawaguchikoRecord high maximum temperature29.2 C (84.6 F)2018-10-07
TakamatsuRecord high minimum temperature23.2 C (73.8 F)2018-10-06
KofuRecord high maximum temperature33.5 C (92.3 F)2018-10-07
ShinjoRecord high maximum temperature30.1 C (86.2 F)2018-10-06
SuwaRecord high minimum temperature17.4 C (63.3 F)2018-10-06
OkayamaRecord high maximum temperature33.4 C (92.1 F)2018-10-06
OitaRecord high maximum temperature31.5 C (88.7 F)2018-10-06
YakushimaRecord high maximum temperature31.0 C (87.8 F)2018-10-06
TokyoRecord high maximum temperature32.3 C (90.1 F)2018-10-07
WajimaRecord high maximum temperature31.6 C (88.9 F)2018-10-06
TakayamaRecord high minimum temperature17.7 C (63.9 F)2018-10-06
MatsumotoRecord high maximum temperature29.3 C (84.7 F)2018-10-06
NagoyaRecord high maximum temperature29.6 C (85.3 F)2018-10-06
MiyakoRecord high maximum temperature27.6 C (81.7 F)2018-10-07
MitoRecord high maximum temperature31.7 C (89.1 F)2018-10-07

Records per Day

Peak day 61
Records per day during Heat wave in Japan, 5 to 10 October 2018 Records set or tied each day from 5 October 2018 to 10 October 2018. The most in one day was 61 on 6 October 2018. 0 20 40 60 80 10-0510-0610-0710-0810-0910-10
Records set or tied each day from 5 October 2018 to 10 October 2018. The most in one day was 61 on 6 October 2018.
Records per day during Heat wave in Japan, 5 to 10 October 2018
DateRecords
2018-10-0510
2018-10-0661
2018-10-0736
2018-10-084
2018-10-092
2018-10-104

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Japan, 5 to 10 October 2018 ranked by margin
Kawaguchiko, 10-075.8 C (10.4 F)
Shizuoka, 10-075.1 C (9.2 F)
Tokyo, 10-075.1 C (9.2 F)
Mito, 10-074.5 C (8.1 F)
Saigo, 10-063.2 C (5.8 F)
Miyako, 10-073.0 C (5.4 F)
Fukui, 10-062.6 C (4.7 F)
Takamatsu, 10-062.6 C (4.7 F)
Shinjo, 10-062.2 C (4.0 F)
Suwa, 10-062.0 C (3.6 F)
Akita, 10-061.7 C (3.1 F)
Okayama, 10-061.7 C (3.1 F)
Wajima, 10-061.7 C (3.1 F)
Takayama, 10-061.4 C (2.5 F)
Choshi, 10-071.3 C (2.3 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, 5 to 10 October 2018 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. 0 20 40 60 80 0.01.53.04.56.0 Margin (C) Years the old record stood
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, 5 to 10 October 2018
Margin (C)Years the old record stood
1.380
5.132
3.249
1.730
2.656
5.832
2.653
0.439
2.219
2.053
5.121
1.720
1.256
1.056
3.037
1.720
1.456
1.356
4.521
1.056
0.956
0.756
0.623
1.020
1.153
5.04
1.549
0.424
0.456
0.356
0.456
0.653
0.556
3.024
0.819
1.249
0.156
0.520
0.156
0.520
2.531
3.419
1.113
0.220
0.253
0.319
1.64
1.72
0.219
4.112
1.343
1.137
0.149
1.732
0.248
0.149
1.631
0.74
4.14
1.831
2.821
4.64
0.441
0.437
1.624
3.71
0.931
0.34
1.032
0.34
0.831
0.25
0.62
3.44
0.332
1.128
1.816
0.131
1.811
0.132
0.328
1.020
0.128
1.316
0.324
1.212
0.719
1.112
0.417
1.58
0.120
0.819
1.84
1.74
1.45
1.24
1.74
0.313
1.34
0.94
1.31
0.84
0.81
1.21
0.84
0.74
0.70
0.14
0.14
0.14
0.14
0.34
0.21
0.50
0.14
0.21
0.21

Compared With Other Events

Station records per event
Station records in Heat wave in Japan, 5 to 10 October 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, 5 to 10 October 2018 (this event)117 records

Every Record Set

20 of 117
Every record set or tied during Heat wave in Japan, 5 to 10 October 2018, in date order
DateStationRecordValueMarginYears stoodSignificance
2018-10-06SaigoRecord high maximum temperature29.5 C (85.1 F)3.2 C (5.8 F)4932 of 100 (Routine)
2018-10-06AkitaRecord high maximum temperature30.1 C (86.2 F)1.7 C (3.1 F)3030 of 100 (Routine)
2018-10-06FukuiRecord high maximum temperature31.7 C (89.1 F)2.6 C (4.7 F)5630 of 100 (Routine)
2018-10-06TakamatsuRecord high minimum temperature23.2 C (73.8 F)2.6 C (4.7 F)5329 of 100 (Routine)
2018-10-06ShinjoRecord high maximum temperature30.1 C (86.2 F)2.2 C (4.0 F)1927 of 100 (Routine)
2018-10-06SuwaRecord high minimum temperature17.4 C (63.3 F)2.0 C (3.6 F)5327 of 100 (Routine)
2018-10-06OkayamaRecord high maximum temperature33.4 C (92.1 F)1.7 C (3.1 F)2027 of 100 (Routine)
2018-10-06OitaRecord high maximum temperature31.5 C (88.7 F)1.2 C (2.2 F)5627 of 100 (Routine)
2018-10-06YakushimaRecord high maximum temperature31.0 C (87.8 F)1.0 C (1.8 F)5627 of 100 (Routine)
2018-10-06WajimaRecord high maximum temperature31.6 C (88.9 F)1.7 C (3.1 F)2026 of 100 (Routine)
2018-10-06TakayamaRecord high minimum temperature17.7 C (63.9 F)1.4 C (2.5 F)5626 of 100 (Routine)
2018-10-06MatsumotoRecord high maximum temperature29.3 C (84.7 F)1.3 C (2.3 F)5626 of 100 (Routine)
2018-10-06NagoyaRecord high maximum temperature29.6 C (85.3 F)1.0 C (1.8 F)5626 of 100 (Routine)
2018-10-07ChoshiRecord high maximum temperature30.6 C (87.1 F)1.3 C (2.3 F)8047 of 100 (Notable)
2018-10-07ShizuokaRecord high maximum temperature33.7 C (92.7 F)5.1 C (9.2 F)3232 of 100 (Routine)
2018-10-07KawaguchikoRecord high maximum temperature29.2 C (84.6 F)5.8 C (10.4 F)3230 of 100 (Routine)
2018-10-07KofuRecord high maximum temperature33.5 C (92.3 F)0.4 C (0.7 F)3928 of 100 (Routine)
2018-10-07TokyoRecord high maximum temperature32.3 C (90.1 F)5.1 C (9.2 F)2127 of 100 (Routine)
2018-10-07MiyakoRecord high maximum temperature27.6 C (81.7 F)3.0 C (5.4 F)3726 of 100 (Routine)
2018-10-07MitoRecord high maximum temperature31.7 C (89.1 F)4.5 C (8.1 F)2126 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 2026-10-12. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.