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Built 2026-10-14 (14 October 2026)

Heat wave in Finland and 6 other countries, 15 to 26 April 2021

Heat wave in Finland and 6 other countries, 15 to 26 April 2021: 186 records at 120 stations, peak on 17 April 2021. Closed.

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

Key Facts

  • Heat wave in Finland and 6 other countries, 15 to 26 April 2021 set or tied 186 station records at 120 stations.
  • It ran from 15 April 2021 to 26 April 2021 (12 days) and its peak day was 17 April 2021.
  • Status: closed.
  • Kanin Nos set a monthly record high maximum temperature of 9.6 C (49.3 F) on 25 April 2021.
  • The busiest day was 17 April 2021 with 59 records.
  • The oldest broken record in the ranked list had stood for 96 years.

Footprint

15 to 26 April 2021
Footprint of Heat wave in Finland and 6 other countries, 15 to 26 April 2021 The area covered by Heat wave in Finland and 6 other countries, 15 to 26 April 2021 is outlined, with 15 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Finland and 6 other countries, 15 to 26 April 2021 is outlined, with 15 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Finland and 6 other countries, 15 to 26 April 2021: stations that set records in the event
StationTypeValueDate
Kanin NosRecord high maximum temperature9.6 C (49.3 F)2021-04-25
VingaRecord high maximum temperature17.0 C (62.6 F)2021-04-18
IndigaRecord high maximum temperature11.0 C (51.8 F)2021-04-25
Oksoey FyrRecord high minimum temperature8.7 C (47.7 F)2021-04-18
Ust TzilmaRecord high minimum temperature5.3 C (41.5 F)2021-04-25
Lemland NyhamnRecord high maximum temperature11.7 C (53.1 F)2021-04-18
TeriberkaRecord high maximum temperature10.6 C (51.1 F)2021-04-19
PjalicaRecord high maximum temperature7.6 C (45.7 F)2021-04-16
KristianstadRecord high maximum temperature18.7 C (65.7 F)2021-04-19
KandalaksaRecord high maximum temperature12.8 C (55.0 F)2021-04-17
SortavalaRecord high maximum temperature14.9 C (58.8 F)2021-04-17
Ukhta KalevalaRecord high maximum temperature14.3 C (57.7 F)2021-04-19
Narjan MarRecord high minimum temperature2.5 C (36.5 F)2021-04-25
Torsvag FyrRecord high maximum temperature11.8 C (53.2 F)2021-04-21
SalekhardRecord high maximum temperature7.5 C (45.5 F)2021-04-26

Records per Day

Peak day 59
Records per day during Heat wave in Finland and 6 other countries, 15 to 26 April 2021 Records set or tied each day from 15 April 2021 to 26 April 2021. The most in one day was 59 on 17 April 2021. 0 15 30 45 60 04-1504-1704-1904-2104-2404-26
Records set or tied each day from 15 April 2021 to 26 April 2021. The most in one day was 59 on 17 April 2021.
Records per day during Heat wave in Finland and 6 other countries, 15 to 26 April 2021
DateRecords
2021-04-151
2021-04-165
2021-04-1759
2021-04-1843
2021-04-1939
2021-04-2013
2021-04-219
2021-04-221
2021-04-244
2021-04-2510
2021-04-262

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Finland and 6 other countries, 15 to 26 April 2021 ranked by margin
Vinga, 04-184.5 C (8.1 F)
Lemland Nyhamn, 04-174.4 C (7.9 F)
Indiga, 04-254.0 C (7.2 F)
Lemland Nyhamn, 04-182.3 C (4.1 F)
Indiga, 04-242.3 C (4.1 F)
Narjan Mar, 04-242.2 C (4.0 F)
Ukhta Kalevala, 04-192.0 C (3.6 F)
Kandalaksa, 04-171.8 C (3.2 F)
Torsvag Fyr, 04-211.8 C (3.2 F)
Ust Tzilma, 04-251.5 C (2.7 F)
Pjalica, 04-161.5 C (2.7 F)
Oksoey Fyr, 04-181.4 C (2.5 F)
Ust Tzilma, 04-241.3 C (2.3 F)
Teriberka, 04-191.1 C (2.0 F)
Sortavala, 04-171.0 C (1.8 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 Finland and 6 other countries, 15 to 26 April 2021 186 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 25 50 75 100 0.01.32.53.85.0 Margin (C) Years the old record stood
186 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 Finland and 6 other countries, 15 to 26 April 2021
Margin (C)Years the old record stood
0.696
4.074
4.556
1.468
1.574
2.360
1.171
2.366
1.571
0.772
1.859
2.060
1.071
0.670
1.860
2.226
0.566
0.359
1.354
4.416
1.162
0.262
0.359
2.254
0.956
0.662
1.262
0.762
0.860
0.659
0.659
1.159
3.438
1.056
0.262
0.856
0.356
0.159
0.359
3.331
1.344
0.256
0.456
1.546
2.132
0.352
3.539
0.844
1.238
0.731
1.832
0.346
2.814
0.231
1.632
1.938
0.931
0.738
1.432
0.635
2.416
1.031
1.332
2.618
2.52
1.926
0.932
0.631
0.232
0.731
1.232
0.918
1.516
1.518
1.616
0.238
0.532
1.220
1.122
1.122
0.118
2.42
1.616
0.232
1.819
0.918
1.718
1.318
0.731
0.14
0.426
0.416
0.422
1.77
0.916
0.532
1.518
0.524
0.718
1.510
0.616
0.716
1.016
1.510
1.418
1.118
1.02
0.516
1.218
0.216
0.812
0.716
0.816
1.014
2.014
1.914
0.416
1.97
0.418
0.818
0.118
0.110
0.624
0.318
0.816
1.510
0.216
0.116
0.416
0.116
0.316
1.37
0.216
2.43
0.42
1.62
0.118
0.616
2.40
0.416
1.710
0.218
1.42
0.214
1.92
0.97
0.77
0.87
0.214
0.316
2.23
0.318
0.322
0.216
1.52
0.316
1.06
0.47
1.02
0.64
0.214
1.02
0.18
0.27
0.74
0.82
1.03
1.03
0.42
0.72
0.12
0.57
0.43
0.42
0.93
0.12
0.22
0.12
0.12
0.13
0.93
0.52
0.63
0.33
0.73
0.12

Compared With Other Events

Station records per event
Station records in Heat wave in Finland and 6 other countries, 15 to 26 April 2021 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 Finland and 6 other countries, 15 to 26 April 2021 (this event)186 records

Every Record Set

20 of 186
Every record set or tied during Heat wave in Finland and 6 other countries, 15 to 26 April 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-04-16PjalicaRecord high maximum temperature7.6 C (45.7 F)1.5 C (2.7 F)7132 of 100 (Routine)
2021-04-17KandalaksaRecord high maximum temperature12.8 C (55.0 F)1.8 C (3.2 F)5931 of 100 (Routine)
2021-04-17SortavalaRecord high maximum temperature14.9 C (58.8 F)1.0 C (1.8 F)7130 of 100 (Routine)
2021-04-17Lemland NyhamnRecord high maximum temperature13.5 C (56.3 F)4.4 C (7.9 F)1627 of 100 (Routine)
2021-04-18VingaRecord high maximum temperature17.0 C (62.6 F)4.5 C (8.1 F)5638 of 100 (Notable)
2021-04-18Oksoey FyrRecord high minimum temperature8.7 C (47.7 F)1.4 C (2.5 F)6835 of 100 (Notable)
2021-04-18Lemland NyhamnRecord high maximum temperature11.7 C (53.1 F)2.3 C (4.1 F)6033 of 100 (Routine)
2021-04-19TeriberkaRecord high maximum temperature10.6 C (51.1 F)1.1 C (2.0 F)7133 of 100 (Routine)
2021-04-19KristianstadRecord high maximum temperature18.7 C (65.7 F)0.7 C (1.3 F)7232 of 100 (Routine)
2021-04-19Ukhta KalevalaRecord high maximum temperature14.3 C (57.7 F)2.0 C (3.6 F)6030 of 100 (Routine)
2021-04-19Oksoey FyrRecord high minimum temperature7.6 C (45.7 F)0.3 C (0.5 F)5928 of 100 (Routine)
2021-04-21Torsvag FyrRecord high maximum temperature11.8 C (53.2 F)1.8 C (3.2 F)6029 of 100 (Routine)
2021-04-24IndigaRecord high maximum temperature11.2 C (52.2 F)2.3 C (4.1 F)6632 of 100 (Routine)
2021-04-24Narjan MarRecord high maximum temperature16.4 C (61.5 F)2.2 C (4.0 F)2629 of 100 (Routine)
2021-04-24Ust TzilmaRecord high maximum temperature17.4 C (63.3 F)1.3 C (2.3 F)5428 of 100 (Routine)
2021-04-25Kanin NosRecord high maximum temperature9.6 C (49.3 F)0.6 C (1.1 F)9650 of 100 (Notable)
2021-04-25IndigaRecord high maximum temperature11.0 C (51.8 F)4.0 C (7.2 F)7438 of 100 (Notable)
2021-04-25Ust TzilmaRecord high minimum temperature5.3 C (41.5 F)1.5 C (2.7 F)7434 of 100 (Routine)
2021-04-25Narjan MarRecord high minimum temperature2.5 C (36.5 F)0.6 C (1.1 F)7030 of 100 (Routine)
2021-04-26SalekhardRecord high maximum temperature7.5 C (45.5 F)0.5 C (0.9 F)6629 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 186 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.