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Built 2026-11-13 (13 November 2026)

Heat wave in Sweden and 2 other countries, 26 to 30 September 2026

Heat wave in Sweden and 2 other countries, 26 to 30 September 2026: 24 records at 21 stations, peak on 29 September 2026. Closed.

Data as of . Last revised (2026-11-12).

Key Facts

  • Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 set or tied 24 station records at 21 stations.
  • It ran from 26 September 2026 to 30 September 2026 (5 days) and its peak day was 29 September 2026.
  • Status: closed.
  • Overtornea set a daily record high maximum temperature of 14.1 C (57.4 F) on 29 September 2026 (provisional).
  • The busiest day was 29 September 2026 with 16 records.
  • The oldest broken record in the ranked list had stood for 68 years.

Footprint

26 to 30 September 2026
Footprint of Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 The area covered by Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 is outlined, with 18 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 is outlined, with 18 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Sweden and 2 other countries, 26 to 30 September 2026: stations that set records in the event
StationTypeValueDate
OvertorneaRecord high maximum temperature14.1 C (57.4 F)2026-09-29
Muonio AlamuonioRecord high maximum temperature12.8 C (55.0 F)2026-09-29
MuodoslompoloRecord high maximum temperature12.7 C (54.9 F)2026-09-29
Ylitornio MeltosjarviRecord high maximum temperature13.5 C (56.3 F)2026-09-29
Sodankyla LokkaRecord high minimum temperature8.6 C (47.5 F)2026-09-29
Rodkallen_ARecord high maximum temperature14.0 C (57.2 F)2026-09-29
TromsoRecord high minimum temperature10.0 C (50.0 F)2026-09-28
Lulea FlygplatsRecord high maximum temperature15.3 C (59.5 F)2026-09-29
Sortland-KleivaRecord high minimum temperature10.5 C (50.9 F)2026-09-28
Stora_Sjofallet_ARecord high maximum temperature11.9 C (53.4 F)2026-09-30
Pello Kk MuseotieRecord high minimum temperature10.2 C (50.4 F)2026-09-26
Lakatrask_ARecord high maximum temperature14.4 C (57.9 F)2026-09-29
Tromso - LangnesRecord high minimum temperature9.2 C (48.6 F)2026-09-28
Saittarova_ARecord high maximum temperature13.3 C (55.9 F)2026-09-29
Kittila PokkaRecord high minimum temperature8.9 C (48.0 F)2026-09-26
Torsvag FyrRecord high minimum temperature11.2 C (52.2 F)2026-09-28
AbiskoRecord high maximum temperature13.8 C (56.8 F)2026-09-28
Ylinenjarvi_ARecord high maximum temperature14.4 C (57.9 F)2026-09-29
Overkalix-Svartbyn_ARecord high maximum temperature14.7 C (58.5 F)2026-09-29
PaharovaRecord high maximum temperature13.1 C (55.6 F)2026-09-29
Parkalompolo_ARecord high maximum temperature12.5 C (54.5 F)2026-09-29
Kemi AjosRecord high maximum temperature13.3 C (55.9 F)2026-09-29

Records per Day

Peak day 16
Records per day during Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 Records set or tied each day from 26 September 2026 to 30 September 2026. The most in one day was 16 on 29 September 2026. 0 5 10 15 20 09-2809-2909-30
Records set or tied each day from 26 September 2026 to 30 September 2026. The most in one day was 16 on 29 September 2026.
Records per day during Heat wave in Sweden and 2 other countries, 26 to 30 September 2026
DateRecords
2026-09-287
2026-09-2916
2026-09-301

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 ranked by margin
Lulea Flygplats, 09-291.8 C (3.2 F)
Muonio Alamuonio, 09-291.7 C (3.1 F)
Ylinenjarvi_A, 09-291.6 C (2.9 F)
Rodkallen_A, 09-291.5 C (2.7 F)
Overkalix-Svartbyn_A, 09-291.5 C (2.7 F)
Overtornea, 09-291.1 C (2.0 F)
Sortland-Kleiva, 09-281.1 C (2.0 F)
Pello Kk Museotie, 09-291.0 C (1.8 F)
Muodoslompolo, 09-280.8 C (1.4 F)
Tromso, 09-280.6 C (1.1 F)
Stora_Sjofallet_A, 09-300.4 C (0.7 F)
Muodoslompolo, 09-290.3 C (0.5 F)
Tromso - Langnes, 09-280.3 C (0.5 F)
Lakatrask_A, 09-290.3 C (0.5 F)
Ylitornio Meltosjarvi, 09-290.2 C (0.4 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 Sweden and 2 other countries, 26 to 30 September 2026 24 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 0.00.51.01.52.0 Margin (C) Years the old record stood
24 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 Sweden and 2 other countries, 26 to 30 September 2026
Margin (C)Years the old record stood
1.168
1.756
0.244
0.244
0.345
1.511
0.64
1.80
1.14
0.425
0.315
0.115
0.325
0.225
0.14
0.80
0.24
1.00
1.54
1.63
0.13
0.73
0.80
0.23

Compared With Other Events

Station records per event
Station records in Heat wave in Sweden and 2 other countries, 26 to 30 September 2026 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 Sweden and 2 other countries, 26 to 30 September 2026 (this event)24 records

Every Record Set

27 of 24
Every record set or tied during Heat wave in Sweden and 2 other countries, 26 to 30 September 2026, in date order
DateStationRecordValueMarginYears stoodSignificance
2026-09-26Pello Kk MuseotieRecord high minimum temperature (provisional)10.2 C (50.4 F)0.4 C (0.7 F)1910 of 100 (Routine)
2026-09-26Kittila PokkaRecord high minimum temperature (provisional)8.9 C (48.0 F)0.6 C (1.1 F)98 of 100 (Routine)
2026-09-26Ylinenjarvi_ARecord high minimum temperature (provisional)9.7 C (49.5 F)0.8 C (1.4 F)34 of 100 (Routine)
2026-09-26Lakatrask_ARecord high minimum temperature (tie) (provisional)6.9 C (44.4 F)tie192 of 100 (Routine)
2026-09-28TromsoRecord high minimum temperature (provisional)10.0 C (50.0 F)0.6 C (1.1 F)413 of 100 (Routine)
2026-09-28Sortland-KleivaRecord high minimum temperature (provisional)10.5 C (50.9 F)1.1 C (2.0 F)411 of 100 (Routine)
2026-09-28Tromso - LangnesRecord high minimum temperature (provisional)9.2 C (48.6 F)0.3 C (0.5 F)1510 of 100 (Routine)
2026-09-28Rodkallen_ARecord high maximum temperature (provisional)12.6 C (54.7 F)0.1 C (0.2 F)1510 of 100 (Routine)
2026-09-28Torsvag FyrRecord high minimum temperature (provisional)11.2 C (52.2 F)0.1 C (0.2 F)48 of 100 (Routine)
2026-09-28MuodoslompoloRecord high maximum temperature (provisional)11.3 C (52.3 F)0.8 C (1.4 F)08 of 100 (Routine)
2026-09-28AbiskoRecord high maximum temperature (provisional)13.8 C (56.8 F)0.2 C (0.4 F)48 of 100 (Routine)
2026-09-29OvertorneaRecord high maximum temperature (provisional)14.1 C (57.4 F)1.1 C (2.0 F)6829 of 100 (Routine)
2026-09-29Muonio AlamuonioRecord high maximum temperature (provisional)12.8 C (55.0 F)1.7 C (3.1 F)5626 of 100 (Routine)
2026-09-29Ylitornio MeltosjarviRecord high maximum temperature (provisional)13.5 C (56.3 F)0.2 C (0.4 F)4419 of 100 (Routine)
2026-09-29Sodankyla LokkaRecord high minimum temperature (provisional)8.6 C (47.5 F)0.2 C (0.4 F)4419 of 100 (Routine)
2026-09-29MuodoslompoloRecord high maximum temperature (provisional)12.7 C (54.9 F)0.3 C (0.5 F)4519 of 100 (Routine)
2026-09-29Rodkallen_ARecord high maximum temperature (provisional)14.0 C (57.2 F)1.5 C (2.7 F)1114 of 100 (Routine)
2026-09-29Lulea FlygplatsRecord high maximum temperature (provisional)15.3 C (59.5 F)1.8 C (3.2 F)012 of 100 (Routine)
2026-09-29Lakatrask_ARecord high maximum temperature (provisional)14.4 C (57.9 F)0.3 C (0.5 F)2510 of 100 (Routine)
2026-09-29Saittarova_ARecord high maximum temperature (provisional)13.3 C (55.9 F)0.2 C (0.4 F)2510 of 100 (Routine)
2026-09-29Pello Kk MuseotieRecord high maximum temperature (provisional)13.8 C (56.8 F)1.0 C (1.8 F)07 of 100 (Routine)
2026-09-29Overkalix-Svartbyn_ARecord high maximum temperature (provisional)14.7 C (58.5 F)1.5 C (2.7 F)47 of 100 (Routine)
2026-09-29Ylinenjarvi_ARecord high maximum temperature (provisional)14.4 C (57.9 F)1.6 C (2.9 F)37 of 100 (Routine)
2026-09-29PaharovaRecord high maximum temperature (provisional)13.1 C (55.6 F)0.7 C (1.3 F)34 of 100 (Routine)
2026-09-29Parkalompolo_ARecord high maximum temperature (provisional)12.5 C (54.5 F)0.8 C (1.4 F)04 of 100 (Routine)
2026-09-29Kemi AjosRecord high maximum temperature (provisional)13.3 C (55.9 F)0.2 C (0.4 F)33 of 100 (Routine)
2026-09-30Stora_Sjofallet_ARecord high maximum temperature (provisional)11.9 C (53.4 F)0.4 C (0.7 F)2511 of 100 (Routine)

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 2026-11-12. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.