Heat wave in Russia and United States, 27 September to 9 October 2018

Name: Heat wave in Russia and United States, 27 September to 9 October 2018
Start: 2018-09-27
End: 2018-10-09
Location: Russia, United States

Heat wave in Russia and United States, 27 September to 9 October 2018: 138 records at 18 stations, peak on 4 October 2018. Closed.

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

Key Facts

Heat wave in Russia and United States, 27 September to 9 October 2018 set or tied 138 station records at 18 stations.
It ran from 27 September 2018 to 9 October 2018 (13 days) and its peak day was 4 October 2018.
Status: closed.
Ostrov Vrangelja set a daily record high maximum temperature of 6.9 C (44.4 F) on 30 September 2018.
The busiest day was 4 October 2018 with 19 records.
The oldest broken record in the ranked list had stood for 88 years.

Footprint

27 September to 9 October 2018

The area covered by Heat wave in Russia and United States, 27 September to 9 October 2018 is outlined, with 9 of the stations that set records marked, coloured by record type. Made with Natural Earth.

Footprint of Heat wave in Russia and United States, 27 September to 9 October 2018: stations that set records in the event
Station	Type	Value	Date
Ostrov Vrangelja	Record high maximum temperature	6.9 C (44.4 F)	2018-09-30
Nome AP	Record high minimum temperature	10.0 C (50.0 F)	2018-09-30
Mys Uelen	Record high maximum temperature	14.2 C (57.6 F)	2018-10-01
Ilirnej	Record high minimum temperature	6.3 C (43.3 F)	2018-10-01
Kotzebue AP	Record high maximum temperature	12.8 C (55.0 F)	2018-09-30
Ostrov Aion	Record high maximum temperature	13.3 C (55.9 F)	2018-10-01
Apuka	Record high maximum temperature	12.6 C (54.7 F)	2018-10-04
Markovo	Record high minimum temperature	6.1 C (43.0 F)	2018-10-05
Egvekinot	Record high maximum temperature	12.1 C (53.8 F)	2018-10-01

Records per Day

Peak day 19

Records set or tied each day from 27 September 2018 to 9 October 2018. The most in one day was 19 on 4 October 2018.

Records per day during Heat wave in Russia and United States, 27 September to 9 October 2018
Date	Records
2018-09-27	3
2018-09-28	12
2018-09-29	10
2018-09-30	15
2018-10-01	15
2018-10-02	10
2018-10-03	10
2018-10-04	19
2018-10-05	15
2018-10-06	14
2018-10-07	13
2018-10-08	1
2018-10-09	1

Top Records by Margin

Margin over the record replaced

Top records of Heat wave in Russia and United States, 27 September to 9 October 2018 ranked by margin
Nome AP, 09-30	5.0 C (9.0 F)
Ostrov Vrangelja, 09-30	4.3 C (7.7 F)
Mys Uelen, 10-01	3.9 C (7.0 F)
Markovo, 10-05	3.3 C (5.9 F)
Ostrov Vrangelja, 09-30	3.1 C (5.6 F)
Nome AP, 09-30	2.8 C (5.0 F)
Markovo, 10-04	2.6 C (4.7 F)
Ilirnej, 10-01	1.9 C (3.4 F)
Ostrov Aion, 10-02	1.8 C (3.2 F)
Kotzebue AP, 09-30	1.7 C (3.1 F)
Kotzebue AP, 10-01	1.1 C (2.0 F)
Ostrov Vrangelja, 09-28	1.1 C (2.0 F)
Kotzebue AP, 10-03	1.1 C (2.0 F)
Kotzebue AP, 10-02	1.1 C (2.0 F)
Egvekinot, 10-01	1.1 C (2.0 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

138 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 Russia and United States, 27 September to 9 October 2018
Margin (C)	Years the old record stood
3.1	84
3.9	50
2.8	88
1.9	73
0.8	73
1.7	88
4.3	56
5.0	48
0.7	64
1.1	51
1.1	79
1.1	76
0.9	77
0.5	76
0.5	76
1.8	73
3.3	61
1.1	68
1.1	44
2.6	60
0.3	79
1.1	64
1.9	59
1.1	73
0.7	73
4.4	60
1.5	59
0.6	42
4.6	51
3.7	51
0.8	55
2.0	39
1.1	60
1.0	60
0.3	64
1.6	51
4.2	11
4.3	21
1.8	33
2.7	1
4.4	36
0.1	59
2.6	36
1.7	0
3.0	1
1.1	0
0.5	8
1.3	1
0.1	51
0.2	51
0.6	33
2.5	0
2.7	28
2.6	1
3.1	21
0.4	1
2.1	29
2.1	23
0.5	0
0.6	28
2.2	11
1.7	28
0.9	33
3.2	1
0.5	27
4.5	0
2.9	12
1.0	1
0.6	0
3.8	1
0.3	28
3.3	1
1.6	15
4.3	12
1.9	12
3.0	1
3.1	1
2.9	1
0.7	29
0.4	29
0.1	29
2.2	20
0.4	29
2.6	1
1.9	1
2.7	4
1.7	13
0.4	23
1.2	12
1.0	11
1.0	11
2.8	1
0.9	16
3.3	3
2.3	1
0.5	20
1.4	1
0.7	11
2.0	1
2.3	0
3.0	1
0.6	12
0.7	1
4.0	1
0.2	16
1.6	1
2.4	1
0.2	16
2.1	1
2.5	1
1.1	1
0.6	1
0.4	1
0.6	1
0.1	1
1.5	12
0.3	17
2.0	1
2.0	1
1.0	4
1.6	1
1.7	3
1.2	1
0.8	1
0.3	12
1.1	1
1.6	1
1.3	3
0.1	1
0.6	3
0.2	1
1.1	3
0.2	0
0.7	3
0.6	3
0.5	1
0.4	1
0.3	1

Compared With Other Events

Station records per event

Station records in Heat wave in Russia and United States, 27 September to 9 October 2018 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 Russia and United States, 27 September to 9 October 2018 (this event)	138 records

Every Record Set

20 of 138

Every record set or tied during Heat wave in Russia and United States, 27 September to 9 October 2018, in date order
Date	Station	Record	Value	Margin	Years stood	Significance
2018-09-28	Ostrov Vrangelja	Record high maximum temperature	6.6 C (43.9 F)	1.1 C (2.0 F)	79	35 of 100 (Notable)
2018-09-30	Ostrov Vrangelja	Record high maximum temperature	6.9 C (44.4 F)	3.1 C (5.6 F)	84	44 of 100 (Notable)
2018-09-30	Nome AP	Record high minimum temperature	10.0 C (50.0 F)	2.8 C (5.0 F)	88	42 of 100 (Notable)
2018-09-30	Kotzebue AP	Record high maximum temperature	12.8 C (55.0 F)	1.7 C (3.1 F)	88	40 of 100 (Notable)
2018-09-30	Ostrov Vrangelja	Record high minimum temperature	5.1 C (41.2 F)	4.3 C (7.7 F)	56	39 of 100 (Notable)
2018-09-30	Nome AP	Record high maximum temperature	16.1 C (61.0 F)	5.0 C (9.0 F)	48	39 of 100 (Notable)
2018-10-01	Mys Uelen	Record high maximum temperature	14.2 C (57.6 F)	3.9 C (7.0 F)	50	42 of 100 (Notable)
2018-10-01	Ilirnej	Record high minimum temperature	6.3 C (43.3 F)	1.9 C (3.4 F)	73	41 of 100 (Notable)
2018-10-01	Ostrov Aion	Record high maximum temperature	13.3 C (55.9 F)	0.8 C (1.4 F)	73	40 of 100 (Notable)
2018-10-01	Kotzebue AP	Record high minimum temperature	7.2 C (45.0 F)	1.1 C (2.0 F)	51	36 of 100 (Notable)
2018-10-01	Egvekinot	Record high maximum temperature	12.1 C (53.8 F)	1.1 C (2.0 F)	44	31 of 100 (Routine)
2018-10-02	Ostrov Aion	Record high maximum temperature	8.9 C (48.0 F)	1.8 C (3.2 F)	73	32 of 100 (Routine)
2018-10-02	Kotzebue AP	Record high maximum temperature	11.7 C (53.1 F)	1.1 C (2.0 F)	68	32 of 100 (Routine)
2018-10-03	Kotzebue AP	Record high maximum temperature	11.1 C (52.0 F)	1.1 C (2.0 F)	76	34 of 100 (Routine)
2018-10-04	Apuka	Record high maximum temperature	12.6 C (54.7 F)	0.7 C (1.3 F)	64	38 of 100 (Notable)
2018-10-04	Kotzebue AP	Record high maximum temperature	9.4 C (48.9 F)	0.5 C (0.9 F)	76	33 of 100 (Routine)
2018-10-04	Markovo	Record high minimum temperature	5.9 C (42.6 F)	2.6 C (4.7 F)	60	31 of 100 (Routine)
2018-10-05	Ostrov Vrangelja	Record high minimum temperature	1.0 C (33.8 F)	0.5 C (0.9 F)	76	32 of 100 (Routine)
2018-10-05	Markovo	Record high minimum temperature	6.1 C (43.0 F)	3.3 C (5.9 F)	61	32 of 100 (Routine)
2018-10-07	Apuka	Record high maximum temperature	11.2 C (52.2 F)	0.9 C (1.6 F)	77	33 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 138 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
3.1	84
3.9	50
2.8	88
1.9	73
0.8	73
1.7	88
4.3	56
5.0	48
0.7	64
1.1	51
1.1	79
1.1	76
0.9	77
0.5	76
0.5	76
1.8	73
3.3	61
1.1	68
1.1	44
2.6	60
0.3	79
1.1	64
1.9	59
1.1	73
0.7	73
4.4	60
1.5	59
0.6	42
4.6	51
3.7	51
0.8	55
2.0	39
1.1	60
1.0	60
0.3	64
1.6	51
4.2	11
4.3	21
1.8	33
2.7	1
4.4	36
0.1	59
2.6	36
1.7	0
3.0	1
1.1	0
0.5	8
1.3	1
0.1	51
0.2	51
0.6	33
2.5	0
2.7	28
2.6	1
3.1	21
0.4	1
2.1	29
2.1	23
0.5	0
0.6	28
2.2	11
1.7	28
0.9	33
3.2	1
0.5	27
4.5	0
2.9	12
1.0	1
0.6	0
3.8	1
0.3	28
3.3	1
1.6	15
4.3	12
1.9	12
3.0	1
3.1	1
2.9	1
0.7	29
0.4	29
0.1	29
2.2	20
0.4	29
2.6	1
1.9	1
2.7	4
1.7	13
0.4	23
1.2	12
1.0	11
1.0	11
2.8	1
0.9	16
3.3	3
2.3	1
0.5	20
1.4	1
0.7	11
2.0	1
2.3	0
3.0	1
0.6	12
0.7	1
4.0	1
0.2	16
1.6	1
2.4	1
0.2	16
2.1	1
2.5	1
1.1	1
0.6	1
0.4	1
0.6	1
0.1	1
1.5	12
0.3	17
2.0	1
2.0	1
1.0	4
1.6	1
1.7	3
1.2	1
0.8	1
0.3	12
1.1	1
1.6	1
1.3	3
0.1	1
0.6	3
0.2	1
1.1	3
0.2	0
0.7	3
0.6	3
0.5	1
0.4	1
0.3	1

Margin (C)	Years the old record stood
3.1	84
3.9	50
2.8	88
1.9	73
0.8	73
1.7	88
4.3	56
5.0	48
0.7	64
1.1	51
1.1	79
1.1	76
0.9	77
0.5	76
0.5	76
1.8	73
3.3	61
1.1	68
1.1	44
2.6	60
0.3	79
1.1	64
1.9	59
1.1	73
0.7	73
4.4	60
1.5	59
0.6	42
4.6	51
3.7	51
0.8	55
2.0	39
1.1	60
1.0	60
0.3	64
1.6	51
4.2	11
4.3	21
1.8	33
2.7	1
4.4	36
0.1	59
2.6	36
1.7	0
3.0	1
1.1	0
0.5	8
1.3	1
0.1	51
0.2	51
0.6	33
2.5	0
2.7	28
2.6	1
3.1	21
0.4	1
2.1	29
2.1	23
0.5	0
0.6	28
2.2	11
1.7	28
0.9	33
3.2	1
0.5	27
4.5	0
2.9	12
1.0	1
0.6	0
3.8	1
0.3	28
3.3	1
1.6	15
4.3	12
1.9	12
3.0	1
3.1	1
2.9	1
0.7	29
0.4	29
0.1	29
2.2	20
0.4	29
2.6	1
1.9	1
2.7	4
1.7	13
0.4	23
1.2	12
1.0	11
1.0	11
2.8	1
0.9	16
3.3	3
2.3	1
0.5	20
1.4	1
0.7	11
2.0	1
2.3	0
3.0	1
0.6	12
0.7	1
4.0	1
0.2	16
1.6	1
2.4	1
0.2	16
2.1	1
2.5	1
1.1	1
0.6	1
0.4	1
0.6	1
0.1	1
1.5	12
0.3	17
2.0	1
2.0	1
1.0	4
1.6	1
1.7	3
1.2	1
0.8	1
0.3	12
1.1	1
1.6	1
1.3	3
0.1	1
0.6	3
0.2	1
1.1	3
0.2	0
0.7	3
0.6	3
0.5	1
0.4	1
0.3	1