Weather Records on 21 October 1977

451 weather records were set or tied worldwide on 21 October 1977. Highest significance: Birsk, RU.

Key Facts for 21 October 1977

On 21 October 1977, 451 weather records were set or tied at long-record stations worldwide.
178 were record highs and 142 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 2 monthly and 448 daily.
Birsk set an all-time record daily precipitation of 58.9 mm (2.3 in) on 21 October 1977.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 420 records.

Record Map

451 stations

451 station records on 21 October 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Birsk	Russia	Record daily precipitation	58.9 mm (2.3 in)	63 of 100 (Major)
Knysna (Tnk)	South Africa	Record daily precipitation	54.0 mm (2.1 in)	63 of 100 (Major)
Heartsease	South Africa	Record daily precipitation	95.0 mm (3.7 in)	54 of 100 (Notable)
Palestina (Smn)	Mexico	Record daily precipitation	169.9 mm (6.7 in)	50 of 100 (Notable)
Puerto Madero	Mexico	Record low minimum temperature	10.6 C (51.1 F)	49 of 100 (Notable)
Goudveld (Bos)	South Africa	Record daily precipitation	55.8 mm (2.2 in)	49 of 100 (Notable)
Pilgrims Rest (Pol)	South Africa	Record daily precipitation	82.0 mm (3.2 in)	46 of 100 (Notable)
Armagh	United Kingdom	Record high minimum temperature	13.1 C (55.6 F)	41 of 100 (Notable)
Dublin Phoenix Park	Ireland	Record high minimum temperature	13.4 C (56.1 F)	40 of 100 (Notable)
Oxford	United Kingdom	Record high minimum temperature	14.3 C (57.7 F)	40 of 100 (Notable)
Gouna (Bos)	South Africa	Record daily precipitation	66.0 mm (2.6 in)	39 of 100 (Notable)
Concordia (Bos)	South Africa	Record daily precipitation	40.0 mm (1.6 in)	39 of 100 (Notable)
Kislovodsk	Russia	Record low minimum temperature	-7.2 C (19.0 F)	36 of 100 (Notable)
Troicko-Pecherskoe	Russia	Record low minimum temperature	-18.8 C (-1.8 F)	35 of 100 (Notable)
Niznij Novgorod	Russia	Record low minimum temperature	-12.3 C (9.9 F)	34 of 100 (Routine)
Sebeni (Bos)	South Africa	Record daily precipitation	45.0 mm (1.8 in)	34 of 100 (Routine)
Camp Wood	United States	Record daily precipitation	65.5 mm (2.6 in)	34 of 100 (Routine)
Deols Chateauroux Aerodrome de	France	Record high minimum temperature	15.1 C (59.2 F)	33 of 100 (Routine)
El Puerto	Mexico	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Oktjabrskij-Gorodok	Russia	Record low maximum temperature	-5.2 C (22.6 F)	33 of 100 (Routine)
Mahackala	Russia	Record low minimum temperature	-1.2 C (29.8 F)	33 of 100 (Routine)
Carnarvon	South Africa	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Buenos Aires Observ	Argentina	Record high maximum temperature	33.2 C (91.8 F)	32 of 100 (Routine)
Grindstone Island	Canada	Record daily precipitation	60.4 mm (2.4 in)	32 of 100 (Routine)
Sandpan	South Africa	Record daily precipitation	30.0 mm (1.2 in)	32 of 100 (Routine)
Arnsberg	Germany	Record high maximum temperature	21.2 C (70.2 F)	31 of 100 (Routine)
Schierke	Germany	Record high maximum temperature	19.9 C (67.8 F)	31 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record high maximum temperature	20.9 C (69.6 F)	30 of 100 (Routine)
Huatusco de Chicuellar	Mexico	Record high minimum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Henichesk	Ukraine	Record low minimum temperature	-4.6 C (23.7 F)	30 of 100 (Routine)
Holton	United States	Record high maximum temperature	28.3 C (82.9 F)	30 of 100 (Routine)
Aachen	Germany	Record high minimum temperature	14.5 C (58.1 F)	29 of 100 (Routine)
Perth Regional Office	Australia	Record high maximum temperature	33.2 C (91.8 F)	28 of 100 (Routine)
Catemaco	Mexico	Record low minimum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Eelde	Netherlands	Record high maximum temperature	19.2 C (66.6 F)	28 of 100 (Routine)
Eastbourne	United Kingdom	Record high minimum temperature	15.3 C (59.5 F)	28 of 100 (Routine)
Georgetown	United States	Record high maximum temperature	32.8 C (91.0 F)	28 of 100 (Routine)
Santaquin Chlorinator	United States	Record high maximum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Bezenchuk	Russia	Record low maximum temperature	-3.4 C (25.9 F)	27 of 100 (Routine)
Derbent	Russia	Record low minimum temperature	0.1 C (32.2 F)	27 of 100 (Routine)
Nikolaev	Ukraine	Record low minimum temperature	-4.0 C (24.8 F)	27 of 100 (Routine)
Perth Regional Office	Australia	Record high minimum temperature	18.1 C (64.6 F)	26 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	14.7 C (58.5 F)	26 of 100 (Routine)
Poset	Russia	Record high maximum temperature	24.0 C (75.2 F)	26 of 100 (Routine)
Fergana	Uzbekistan	Record high minimum temperature	11.2 C (52.2 F)	26 of 100 (Routine)
Northam	Australia	Record high maximum temperature	35.5 C (95.9 F)	25 of 100 (Routine)
Wandering Comparison	Australia	Record high maximum temperature	31.0 C (87.8 F)	25 of 100 (Routine)
Montelimar	France	Record high minimum temperature	16.7 C (62.1 F)	25 of 100 (Routine)
Tavira	Portugal	Record high maximum temperature	29.6 C (85.3 F)	25 of 100 (Routine)
Pogranichnyj	Russia	Record high maximum temperature	25.4 C (77.7 F)	25 of 100 (Routine)
Nqamakwe (Tnk)	South Africa	Record daily precipitation	42.5 mm (1.7 in)	25 of 100 (Routine)
Port Aux Basques	Canada	Record daily precipitation	42.6 mm (1.7 in)	24 of 100 (Routine)
Nordby (Fano)	Denmark	Record high maximum temperature	16.6 C (61.9 F)	24 of 100 (Routine)
Kjahta	Russia	Record high maximum temperature	17.5 C (63.5 F)	24 of 100 (Routine)
Orland	United States	Record low maximum temperature	16.7 C (62.1 F)	24 of 100 (Routine)
Niu Ridge 1035	United States	Record high maximum temperature	31.7 C (89.1 F)	24 of 100 (Routine)
Marseille Obs. Palais-Lonchamp	France	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Orly	France	Record high minimum temperature	15.4 C (59.7 F)	23 of 100 (Routine)
Tonala (Smn)	Mexico	Record high maximum temperature	38.9 C (102.0 F)	23 of 100 (Routine)
Gridino	Russia	Record low minimum temperature	-8.5 C (16.7 F)	23 of 100 (Routine)

Counts by Type and Timescale

451 records

Records set or tied on 21 October 1977 by type: Highest daily maximum 95, Lowest daily maximum 69, Highest daily minimum 83, Lowest daily minimum 73, Heaviest daily rainfall 129, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 21 October 1977 by type
Record type	Records
Highest daily maximum	95
Lowest daily maximum	69
Highest daily minimum	83
Lowest daily minimum	73
Heaviest daily rainfall	129
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 21 October 1977 by timescale: all-time 1, monthly 2, daily 448.

How Much Records Were Beaten By

398 broken records

Margins by which the 398 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 145.0. Ties are not counted.

Top 20 by Significance

21 October 1977

Top 20 records on 21 October 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1977	Birsk, RU	all-time rain	58.9 mm (2.3 in)	14.2 mm (0.6 in)	22 years	63 of 100 (Major)
21 October 1977	Knysna (Tnk), ZA	daily rain	54.0 mm (2.1 in)	29.9 mm (1.2 in)	75 years	63 of 100 (Major)
21 October 1977	Heartsease, ZA	daily rain	95.0 mm (3.7 in)	59.4 mm (2.3 in)	32 years	54 of 100 (Notable)
21 October 1977	Palestina (Smn), MX	daily rain	169.9 mm (6.7 in)	145.0 mm (5.7 in)	20 years	50 of 100 (Notable)
21 October 1977	Puerto Madero, MX	daily low min	10.6 C (51.1 F)	8.3 C (14.9 F)	23 years	49 of 100 (Notable)
21 October 1977	Goudveld (Bos), ZA	daily rain	55.8 mm (2.2 in)	20.2 mm (0.8 in)	68 years	49 of 100 (Notable)
21 October 1977	Pilgrims Rest (Pol), ZA	daily rain	82.0 mm (3.2 in)	33.5 mm (1.3 in)	22 years	46 of 100 (Notable)
21 October 1977	Armagh, GB	daily high min	13.1 C (55.6 F)	0.5 C (0.9 F)	110 years	41 of 100 (Notable)
21 October 1977	Dublin Phoenix Park, IE	daily high min	13.4 C (56.1 F)	0.1 C (0.2 F)	109 years	40 of 100 (Notable)
21 October 1977	Oxford, GB	daily high min	14.3 C (57.7 F)	0.2 C (0.4 F)	149 years	40 of 100 (Notable)
21 October 1977	Gouna (Bos), ZA	daily rain	66.0 mm (2.6 in)	24.9 mm (1.0 in)	42 years	39 of 100 (Notable)
21 October 1977	Concordia (Bos), ZA	daily rain	40.0 mm (1.6 in)	26.3 mm (1.0 in)	24 years	39 of 100 (Notable)
21 October 1977	Kislovodsk, RU	daily low min	-7.2 C (19.0 F)	3.7 C (6.7 F)	66 years	36 of 100 (Notable)
21 October 1977	Troicko-Pecherskoe, RU	daily low min	-18.8 C (-1.8 F)	1.1 C (2.0 F)	85 years	35 of 100 (Notable)
21 October 1977	Niznij Novgorod, RU	daily low min	-12.3 C (9.9 F)	3.3 C (5.9 F)	64 years	34 of 100 (Routine)
21 October 1977	Sebeni (Bos), ZA	daily rain	45.0 mm (1.8 in)	21.8 mm (0.9 in)	20 years	34 of 100 (Routine)
21 October 1977	Camp Wood, US	daily rain	65.5 mm (2.6 in)	52.3 mm (2.1 in)	28 years	34 of 100 (Routine)
21 October 1977	Deols Chateauroux Aerodrome de, FR	daily high min	15.1 C (59.2 F)	1.6 C (2.9 F)	75 years	33 of 100 (Routine)
21 October 1977	El Puerto, MX	daily rain	34.8 mm (1.4 in)	22.6 mm (0.9 in)	30 years	33 of 100 (Routine)
21 October 1977	Oktjabrskij-Gorodok, RU	daily low max	-5.2 C (22.6 F)	1.6 C (2.9 F)	78 years	33 of 100 (Routine)

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

1795 to 1977

Records set or tied on this calendar date in each year from 1795 to 1977. 1977 had 451 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1977-10-21: 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 2026-10-14 (14 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 20	384
20 to 40	9
40 to 60	3
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	0
140 to 160	1