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Built 2026-10-19 (19 October 2026)

Heat wave in Russia and 7 other countries, 9 to 16 April 2021

Heat wave in Russia and 7 other countries, 9 to 16 April 2021: 178 records at 126 stations, peak on 14 April 2021. Closed.

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

Key Facts

  • Heat wave in Russia and 7 other countries, 9 to 16 April 2021 set or tied 178 station records at 126 stations.
  • It ran from 9 April 2021 to 16 April 2021 (8 days) and its peak day was 14 April 2021.
  • Status: closed.
  • Atyrau set a daily record high maximum temperature of 26.4 C (79.5 F) on 13 April 2021.
  • The busiest day was 14 April 2021 with 52 records.
  • The oldest broken record in the ranked list had stood for 75 years.

Footprint

9 to 16 April 2021
Footprint of Heat wave in Russia and 7 other countries, 9 to 16 April 2021 The area covered by Heat wave in Russia and 7 other countries, 9 to 16 April 2021 is outlined, with 17 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Russia and 7 other countries, 9 to 16 April 2021 is outlined, with 17 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Russia and 7 other countries, 9 to 16 April 2021: stations that set records in the event
StationTypeValueDate
AtyrauRecord high maximum temperature26.4 C (79.5 F)2021-04-13
TihvinRecord high minimum temperature7.4 C (45.3 F)2021-04-13
SerovRecord high minimum temperature8.6 C (47.5 F)2021-04-14
PoretskoyeRecord high maximum temperature22.6 C (72.7 F)2021-04-14
NjaksimvolRecord high maximum temperature19.3 C (66.7 F)2021-04-14
LukojanovRecord high maximum temperature22.8 C (73.0 F)2021-04-14
Helsinki IlmalaRecord high maximum temperature13.2 C (55.8 F)2021-04-12
HolmRecord high minimum temperature7.0 C (44.6 F)2021-04-13
Tot-MaRecord high maximum temperature19.7 C (67.5 F)2021-04-13
ShenkurskRecord high maximum temperature20.8 C (69.4 F)2021-04-14
ArhangelskRecord high minimum temperature5.5 C (41.9 F)2021-04-13
BirzaiRecord high minimum temperature9.0 C (48.2 F)2021-04-12
KirovRecord high maximum temperature19.8 C (67.6 F)2021-04-14
Joskar-OlaRecord high maximum temperature21.8 C (71.2 F)2021-04-14
Alatyr'Record high maximum temperature23.0 C (73.4 F)2021-04-14
KudymkarRecord high maximum temperature20.3 C (68.5 F)2021-04-14
GlazovRecord high maximum temperature19.4 C (66.9 F)2021-04-15

Records per Day

Peak day 52
Records per day during Heat wave in Russia and 7 other countries, 9 to 16 April 2021 Records set or tied each day from 9 April 2021 to 16 April 2021. The most in one day was 52 on 14 April 2021. 0 15 30 45 60 04-0904-1004-1104-1204-1304-1404-1504-16
Records set or tied each day from 9 April 2021 to 16 April 2021. The most in one day was 52 on 14 April 2021.
Records per day during Heat wave in Russia and 7 other countries, 9 to 16 April 2021
DateRecords
2021-04-091
2021-04-108
2021-04-115
2021-04-1233
2021-04-1346
2021-04-1452
2021-04-1531
2021-04-162

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Russia and 7 other countries, 9 to 16 April 2021 ranked by margin
Shenkursk, 04-145.0 C (9.0 F)
Alatyr', 04-144.0 C (7.2 F)
Serov, 04-143.6 C (6.5 F)
Tihvin, 04-133.2 C (5.8 F)
Njaksimvol, 04-142.8 C (5.0 F)
Lukojanov, 04-142.7 C (4.9 F)
Helsinki Ilmala, 04-122.7 C (4.9 F)
Arhangelsk, 04-132.7 C (4.9 F)
Birzai, 04-122.4 C (4.3 F)
Tot-Ma, 04-132.3 C (4.1 F)
Poretskoye, 04-142.0 C (3.6 F)
Holm, 04-132.0 C (3.6 F)
Atyrau, 04-101.7 C (3.1 F)
Kirov, 04-141.7 C (3.1 F)
Glazov, 04-151.6 C (2.9 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 Russia and 7 other countries, 9 to 16 April 2021 178 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
178 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 7 other countries, 9 to 16 April 2021
Margin (C)Years the old record stood
1.275
3.260
3.659
2.059
2.859
2.759
2.754
5.030
2.059
2.348
2.746
1.746
2.448
1.748
0.959
0.859
0.759
4.048
1.459
1.659
0.759
4.731
3.431
2.646
1.046
4.230
4.230
1.448
1.348
1.448
0.459
0.248
0.659
1.548
1.148
1.448
0.144
2.230
3.731
0.648
2.435
0.848
0.843
1.530
0.148
0.848
0.946
1.038
0.946
0.944
1.530
1.231
3.330
3.630
0.338
2.635
1.348
3.423
0.138
0.146
1.432
0.348
0.444
2.831
5.219
5.219
2.631
2.430
4.519
0.248
2.331
3.032
2.026
0.344
0.344
0.838
0.238
3.026
0.132
1.532
1.432
1.931
1.830
1.831
2.826
2.926
0.438
1.135
1.430
1.132
0.631
2.519
1.030
1.719
0.532
0.532
0.338
1.035
2.226
1.223
0.138
0.930
0.230
0.530
1.220
1.826
2.026
1.026
1.526
1.826
0.332
0.330
0.430
1.019
1.819
0.726
0.432
0.331
2.120
0.819
0.132
0.532
0.730
0.426
1.119
2.010
0.926
1.320
2.24
2.319
0.326
0.526
0.726
0.726
0.823
1.98
1.319
0.319
0.626
0.720
0.112
2.412
0.726
1.226
0.212
0.219
1.219
0.18
0.919
0.719
0.220
0.46
0.219
1.612
0.719
0.512
1.96
1.48
1.012
1.04
0.812
0.119
0.96
1.94
2.24
0.416
2.44
2.12
0.419
0.111
0.18
0.88
0.96
0.44
0.74
0.24
0.36
0.16

Compared With Other Events

Station records per event
Station records in Heat wave in Russia and 7 other countries, 9 to 16 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 Russia and 7 other countries, 9 to 16 April 2021 (this event)178 records

Every Record Set

20 of 178
Every record set or tied during Heat wave in Russia and 7 other countries, 9 to 16 April 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-04-10AtyrauRecord high minimum temperature14.9 C (58.8 F)1.7 C (3.1 F)4626 of 100 (Routine)
2021-04-12Helsinki IlmalaRecord high maximum temperature13.2 C (55.8 F)2.7 C (4.9 F)5428 of 100 (Routine)
2021-04-12BirzaiRecord high minimum temperature9.0 C (48.2 F)2.4 C (4.3 F)4826 of 100 (Routine)
2021-04-13AtyrauRecord high maximum temperature26.4 C (79.5 F)1.2 C (2.2 F)7534 of 100 (Routine)
2021-04-13TihvinRecord high minimum temperature7.4 C (45.3 F)3.2 C (5.8 F)6032 of 100 (Routine)
2021-04-13HolmRecord high minimum temperature7.0 C (44.6 F)2.0 C (3.6 F)5928 of 100 (Routine)
2021-04-13Tot-MaRecord high maximum temperature19.7 C (67.5 F)2.3 C (4.1 F)4828 of 100 (Routine)
2021-04-13ArhangelskRecord high minimum temperature5.5 C (41.9 F)2.7 C (4.9 F)4627 of 100 (Routine)
2021-04-14SerovRecord high minimum temperature8.6 C (47.5 F)3.6 C (6.5 F)5931 of 100 (Routine)
2021-04-14PoretskoyeRecord high maximum temperature22.6 C (72.7 F)2.0 C (3.6 F)5930 of 100 (Routine)
2021-04-14NjaksimvolRecord high maximum temperature19.3 C (66.7 F)2.8 C (5.0 F)5929 of 100 (Routine)
2021-04-14LukojanovRecord high maximum temperature22.8 C (73.0 F)2.7 C (4.9 F)5929 of 100 (Routine)
2021-04-14ShenkurskRecord high maximum temperature20.8 C (69.4 F)5.0 C (9.0 F)3028 of 100 (Routine)
2021-04-14KirovRecord high maximum temperature19.8 C (67.6 F)1.7 C (3.1 F)4826 of 100 (Routine)
2021-04-14Joskar-OlaRecord high maximum temperature21.8 C (71.2 F)0.9 C (1.6 F)5926 of 100 (Routine)
2021-04-14Alatyr'Record high maximum temperature23.0 C (73.4 F)4.0 C (7.2 F)4826 of 100 (Routine)
2021-04-14KudymkarRecord high maximum temperature20.3 C (68.5 F)1.4 C (2.5 F)5926 of 100 (Routine)
2021-04-15Joskar-OlaRecord high maximum temperature22.4 C (72.3 F)0.8 C (1.4 F)5926 of 100 (Routine)
2021-04-15LukojanovRecord high maximum temperature22.6 C (72.7 F)0.7 C (1.3 F)5926 of 100 (Routine)
2021-04-15GlazovRecord high maximum temperature19.4 C (66.9 F)1.6 C (2.9 F)5926 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 178 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.