Weather Records on 21 April 1979

449 weather records were set or tied worldwide on 21 April 1979. Highest significance: Champoton (Smn), MX.

Key Facts for 21 April 1979

On 21 April 1979, 449 weather records were set or tied at long-record stations worldwide.
76 were record highs and 173 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 443 daily.
Champoton (Smn) set a daily record precipitation of 73.9 mm (2.9 in) on 21 April 1979.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

449 stations

449 station records on 21 April 1979 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 1979: highest significance records shown on the map
Station	Country	Type	Value	Significance
Champoton (Smn)	Mexico	Record daily precipitation	73.9 mm (2.9 in)	62 of 100 (Major)
Vryburg (Pol)	South Africa	Record daily precipitation	60.0 mm (2.4 in)	60 of 100 (Major)
Robstown	United States	Record daily precipitation	93.5 mm (3.7 in)	57 of 100 (Notable)
Warren 2 S	United States	Record daily precipitation	125.7 mm (4.9 in)	56 of 100 (Notable)
Lafayette Rgnl AP	United States	Record daily precipitation	199.1 mm (7.8 in)	52 of 100 (Notable)
Sanderson	United States	Record daily precipitation	30.5 mm (1.2 in)	50 of 100 (Notable)
Corpus Christi NAS	United States	Record daily precipitation	116.6 mm (4.6 in)	50 of 100 (Notable)
Franklin 3 NW	United States	Record daily precipitation	166.4 mm (6.6 in)	47 of 100 (Notable)
Poteet	United States	Record daily precipitation	85.6 mm (3.4 in)	44 of 100 (Notable)
Miahuatlan (Smn)	Mexico	Record daily precipitation	43.4 mm (1.7 in)	42 of 100 (Notable)
Poretskoye	Russia	Record low minimum temperature	-11.3 C (11.7 F)	42 of 100 (Notable)
Crockett	United States	Record daily precipitation	94.2 mm (3.7 in)	41 of 100 (Notable)
Paraiso	Mexico	Record daily precipitation	69.9 mm (2.8 in)	40 of 100 (Notable)
Tbilisi	Georgia	Record low maximum temperature	6.8 C (44.2 F)	38 of 100 (Notable)
Vytegra	Russia	Record low minimum temperature	-14.1 C (6.6 F)	38 of 100 (Notable)
Poretskoye	Russia	Record low maximum temperature	-2.4 C (27.7 F)	38 of 100 (Notable)
Velikie Luki	Russia	Record low minimum temperature	-7.1 C (19.2 F)	37 of 100 (Notable)
Matias Romero (Smn)	Mexico	Record daily precipitation	37.8 mm (1.5 in)	36 of 100 (Notable)
Tot-Ma	Russia	Record low minimum temperature	-12.4 C (9.7 F)	36 of 100 (Notable)
Sotchi	Russia	Record low minimum temperature	1.6 C (34.9 F)	36 of 100 (Notable)
Kaalplaas	South Africa	Record daily precipitation	31.0 mm (1.2 in)	36 of 100 (Notable)
Val (Sar)	South Africa	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Manaira (Alagoa Nova)	Brazil	Record daily precipitation	134.0 mm (5.3 in)	35 of 100 (Notable)
Kargopol	Russia	Record low minimum temperature	-17.2 C (1.0 F)	35 of 100 (Notable)
Elatma	Russia	Record low maximum temperature	-0.2 C (31.6 F)	35 of 100 (Notable)
Zametchino	Russia	Record low minimum temperature	-9.5 C (14.9 F)	35 of 100 (Notable)
Bogoroditskoye-Fenino	Russia	Record low minimum temperature	-5.1 C (22.8 F)	35 of 100 (Notable)
Taung	South Africa	Record daily precipitation	27.5 mm (1.1 in)	34 of 100 (Routine)
Las Flores	Mexico	Record daily precipitation	58.7 mm (2.3 in)	33 of 100 (Routine)
Livingston 2 NNE	United States	Record daily precipitation	87.9 mm (3.5 in)	33 of 100 (Routine)
Mier Y Noriega (Smn)	Mexico	Record daily precipitation	29.0 mm (1.1 in)	31 of 100 (Routine)
Petropavlovskij Majak	Russia	Record low maximum temperature	-4.6 C (23.7 F)	31 of 100 (Routine)
Spiro	United States	Record daily precipitation	83.8 mm (3.3 in)	31 of 100 (Routine)
Inza	Russia	Record low minimum temperature	-14.1 C (6.6 F)	30 of 100 (Routine)
Jourdanton	United States	Record daily precipitation	51.6 mm (2.0 in)	30 of 100 (Routine)
Hennessey 4 ESE	United States	Record daily precipitation	28.4 mm (1.1 in)	29 of 100 (Routine)
Acude Mundo Novo	Brazil	Record daily precipitation	46.0 mm (1.8 in)	28 of 100 (Routine)
Petropavlovskij Majak	Russia	Record low minimum temperature	-9.6 C (14.7 F)	28 of 100 (Routine)
Sandbaken	South Africa	Record daily precipitation	41.0 mm (1.6 in)	28 of 100 (Routine)
Summit	United States	Record snow depth	383.5 cm (151.0 in)	28 of 100 (Routine)
Kislovodsk	Russia	Record low maximum temperature	5.4 C (41.7 F)	27 of 100 (Routine)
Feodosiia	Ukraine	Record low minimum temperature	0.4 C (32.7 F)	26 of 100 (Routine)
Karnack	United States	Record daily precipitation	60.5 mm (2.4 in)	26 of 100 (Routine)
Minatitlan	Mexico	Record daily precipitation	53.8 mm (2.1 in)	25 of 100 (Routine)
Zametchino	Russia	Record low maximum temperature	-0.3 C (31.5 F)	25 of 100 (Routine)
De Ridder	United States	Record daily precipitation	73.7 mm (2.9 in)	25 of 100 (Routine)
Kargopol	Russia	Record low maximum temperature	-2.3 C (27.9 F)	24 of 100 (Routine)
Tihvin	Russia	Record low minimum temperature	-15.0 C (5.0 F)	24 of 100 (Routine)
Rjazan	Russia	Record low minimum temperature	-7.1 C (19.2 F)	24 of 100 (Routine)
Gagnoa	Cote D'Ivoire	Record high minimum temperature	25.1 C (77.2 F)	23 of 100 (Routine)
Dimbokro	Cote D'Ivoire	Record high minimum temperature	26.5 C (79.7 F)	23 of 100 (Routine)
Voronez	Russia	Record low maximum temperature	3.1 C (37.6 F)	23 of 100 (Routine)
Saint Maries	United States	Record low minimum temperature	-8.9 C (16.0 F)	23 of 100 (Routine)
Hedley	Canada	Record low minimum temperature	-3.0 C (26.6 F)	22 of 100 (Routine)
Rjazan	Russia	Record low maximum temperature	-0.2 C (31.6 F)	22 of 100 (Routine)
Penza	Russia	Record low minimum temperature	-12.8 C (9.0 F)	22 of 100 (Routine)
Ft Madison	United States	Record daily precipitation	26.7 mm (1.1 in)	22 of 100 (Routine)
Atlanta	United States	Record daily precipitation	56.6 mm (2.2 in)	22 of 100 (Routine)
Fowlerton	United States	Record daily precipitation	40.6 mm (1.6 in)	22 of 100 (Routine)
Ocean Falls	Canada	Record low minimum temperature	-3.9 C (25.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

449 records

Records set or tied on 21 April 1979 by type: Highest daily maximum 29, Lowest daily maximum 90, Highest daily minimum 47, Lowest daily minimum 83, Heaviest daily rainfall 194, Heaviest daily snowfall 2, Deepest snow cover 4.

Records on 21 April 1979 by type
Record type	Records
Highest daily maximum	29
Lowest daily maximum	90
Highest daily minimum	47
Lowest daily minimum	83
Heaviest daily rainfall	194
Heaviest daily snowfall	2
Deepest snow cover	4

Records on 21 April 1979 by timescale: all-time 1, monthly 5, daily 443.

How Much Records Were Beaten By

397 broken records

Margins by which the 397 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1295.0. Ties are not counted.

Top 20 by Significance

21 April 1979

Top 20 records on 21 April 1979 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1979	Champoton (Smn), MX	daily rain	73.9 mm (2.9 in)	73.9 mm (2.9 in)	57 years	62 of 100 (Major)
21 April 1979	Vryburg (Pol), ZA	daily rain	60.0 mm (2.4 in)	49.1 mm (1.9 in)	38 years	60 of 100 (Major)
21 April 1979	Robstown, US	daily rain	93.5 mm (3.7 in)	61.7 mm (2.4 in)	49 years	57 of 100 (Notable)
21 April 1979	Warren 2 S, US	daily rain	125.7 mm (4.9 in)	98.5 mm (3.9 in)	42 years	56 of 100 (Notable)
21 April 1979	Lafayette Rgnl AP, US	monthly rain	199.1 mm (7.8 in)	51.0 mm (2.0 in)	37 years	52 of 100 (Notable)
21 April 1979	Sanderson, US	daily rain	30.5 mm (1.2 in)	20.3 mm (0.8 in)	81 years	50 of 100 (Notable)
21 April 1979	Corpus Christi NAS, US	daily rain	116.6 mm (4.6 in)	64.5 mm (2.5 in)	32 years	50 of 100 (Notable)
21 April 1979	Franklin 3 NW, US	daily rain	166.4 mm (6.6 in)	101.4 mm (4.0 in)	12 years	47 of 100 (Notable)
21 April 1979	Poteet, US	daily rain	85.6 mm (3.4 in)	56.4 mm (2.2 in)	21 years	44 of 100 (Notable)
21 April 1979	Miahuatlan (Smn), MX	daily rain	43.4 mm (1.7 in)	35.0 mm (1.4 in)	21 years	42 of 100 (Notable)
21 April 1979	Poretskoye, RU	daily low min	-11.3 C (11.7 F)	4.9 C (8.8 F)	85 years	42 of 100 (Notable)
21 April 1979	Crockett, US	daily rain	94.2 mm (3.7 in)	41.6 mm (1.6 in)	52 years	41 of 100 (Notable)
21 April 1979	Paraiso, MX	daily rain	69.9 mm (2.8 in)	69.9 mm (2.8 in)	29 years	40 of 100 (Notable)
21 April 1979	Tbilisi, GE	daily low max	6.8 C (44.2 F)	2.8 C (5.0 F)	82 years	38 of 100 (Notable)
21 April 1979	Vytegra, RU	daily low min	-14.1 C (6.6 F)	2.9 C (5.2 F)	85 years	38 of 100 (Notable)
21 April 1979	Poretskoye, RU	daily low max	-2.4 C (27.7 F)	3.8 C (6.8 F)	85 years	38 of 100 (Notable)
21 April 1979	Velikie Luki, RU	daily low min	-7.1 C (19.2 F)	1.4 C (2.5 F)	85 years	37 of 100 (Notable)
21 April 1979	Matias Romero (Smn), MX	daily rain	37.8 mm (1.5 in)	36.0 mm (1.4 in)	4 years	36 of 100 (Notable)
21 April 1979	Tot-Ma, RU	daily low min	-12.4 C (9.7 F)	1.6 C (2.9 F)	85 years	36 of 100 (Notable)
21 April 1979	Sotchi, RU	daily low min	1.6 C (34.9 F)	1.0 C (1.8 F)	85 years	36 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1793 to 1979

Records set or tied on this calendar date in each year from 1793 to 1979. 1979 had 449 records.

Counts for years before the ledger starts come from the same station rules.

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 1979-04-21: CSV or JSON. Field meanings are on the data page.

Sources: 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)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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

Margin	Records
0 to 200	396
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	0
1200 to 1400	1