Weather Records on 21 August 1973

438 weather records were set or tied worldwide on 21 August 1973. Highest significance: Solomons, US.

Key Facts for 21 August 1973

On 21 August 1973, 438 weather records were set or tied at long-record stations worldwide.
118 were record highs and 187 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 428 daily.
Solomons set a daily record precipitation of 108.5 mm (4.3 in) on 21 August 1973.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 450 records.

Record Map

438 stations

438 station records on 21 August 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Solomons	United States	Record daily precipitation	108.5 mm (4.3 in)	59 of 100 (Notable)
Tenosique (Smn)	Mexico	Record daily precipitation	166.4 mm (6.6 in)	58 of 100 (Notable)
Jaguarari	Brazil	Record daily precipitation	44.1 mm (1.7 in)	54 of 100 (Notable)
Heber	United States	Record daily precipitation	26.4 mm (1.0 in)	51 of 100 (Notable)
Irara	Brazil	Record daily precipitation	40.0 mm (1.6 in)	49 of 100 (Notable)
Vjazemskaja	Russia	Record daily precipitation	69.3 mm (2.7 in)	49 of 100 (Notable)
Kasilof 3 NW	United States	Record daily precipitation	31.5 mm (1.2 in)	48 of 100 (Notable)
Joinville (Rvpsc)	Brazil	Record daily precipitation	51.0 mm (2.0 in)	47 of 100 (Notable)
Villahermosa (Smn)	Mexico	Record daily precipitation	95.8 mm (3.8 in)	46 of 100 (Notable)
Elko Rgnl AP	United States	Record high minimum temperature	20.0 C (68.0 F)	44 of 100 (Notable)
Talkeetna AP	United States	Record daily precipitation	47.5 mm (1.9 in)	44 of 100 (Notable)
Jacobina	Brazil	Record daily precipitation	46.8 mm (1.8 in)	43 of 100 (Notable)
Tierra Amarilla 4 N	United States	Record daily precipitation	36.1 mm (1.4 in)	43 of 100 (Notable)
Quantico 1 S	United States	Record daily precipitation	64.0 mm (2.5 in)	43 of 100 (Notable)
Kendall 2 E	United States	Record daily precipitation	73.7 mm (2.9 in)	39 of 100 (Notable)
Jacobina	Brazil	Record daily precipitation	47.4 mm (1.9 in)	38 of 100 (Notable)
Ft Pierce	United States	Record low maximum temperature	28.3 C (82.9 F)	38 of 100 (Notable)
El Salto (Smn)	Mexico	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Kotel'nikovo	Russia	Record daily precipitation	31.2 mm (1.2 in)	37 of 100 (Notable)
Ft Ross	United States	Record low minimum temperature	5.6 C (42.1 F)	37 of 100 (Notable)
Ft Robinson	United States	Record high minimum temperature	21.1 C (70.0 F)	37 of 100 (Notable)
Gvasjugi	Russia	Record daily precipitation	65.8 mm (2.6 in)	36 of 100 (Notable)
Andover	United States	Record daily precipitation	41.1 mm (1.6 in)	36 of 100 (Notable)
Beaver Falls 1 NE	United States	Record daily precipitation	36.1 mm (1.4 in)	35 of 100 (Notable)
Fredericksburg Np	United States	Record daily precipitation	89.9 mm (3.5 in)	35 of 100 (Notable)
Alagoinhas (Vfflb)	Brazil	Record daily precipitation	31.0 mm (1.2 in)	34 of 100 (Routine)
Freiburg	Germany	Record high minimum temperature	19.0 C (66.2 F)	34 of 100 (Routine)
San Pedro Chenalho (Smn)	Mexico	Record daily precipitation	69.3 mm (2.7 in)	34 of 100 (Routine)
Mason City	United States	Record daily precipitation	34.8 mm (1.4 in)	34 of 100 (Routine)
Morozovsk	Russia	Record daily precipitation	29.9 mm (1.2 in)	33 of 100 (Routine)
Escondido	United States	Record high minimum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Everglades	United States	Record low maximum temperature	28.9 C (84.0 F)	33 of 100 (Routine)
Hatteras	United States	Record low minimum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Tenosique (Smn)	Mexico	Record low maximum temperature	25.0 C (77.0 F)	32 of 100 (Routine)
Nizhny-Chir	Russia	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Longmont 2 ESE	United States	Record high maximum temperature	35.6 C (96.1 F)	32 of 100 (Routine)
Naples	United States	Record low minimum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
La Plata 1 W	United States	Record daily precipitation	80.3 mm (3.2 in)	32 of 100 (Routine)
New Castle 1 N	United States	Record low maximum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Walkerton 2 NW	United States	Record daily precipitation	85.3 mm (3.4 in)	32 of 100 (Routine)
Willapa Harbor	United States	Record low minimum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Wellsburg Wtr Trmt Pl	United States	Record low maximum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Vienna	United States	Record daily precipitation	82.6 mm (3.3 in)	31 of 100 (Routine)
Fort Resolution A	Canada	Record low minimum temperature	-0.6 C (30.9 F)	30 of 100 (Routine)
Soledad de Doblado	Mexico	Record low maximum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Warren 3 S	United States	Record low maximum temperature	20.0 C (68.0 F)	30 of 100 (Routine)
Atzalan	Mexico	Record low maximum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Malaga Aeropuerto	Spain	Record daily precipitation	26.0 mm (1.0 in)	29 of 100 (Routine)
Chula Vista	United States	Record high maximum temperature	27.8 C (82.0 F)	29 of 100 (Routine)
Homestead Exp STN	United States	Record low maximum temperature	27.8 C (82.0 F)	29 of 100 (Routine)
Minatitlan	Mexico	Record daily precipitation	62.5 mm (2.5 in)	28 of 100 (Routine)
Tryvasshogda	Norway	Record low minimum temperature	-0.1 C (31.8 F)	28 of 100 (Routine)
Wooster Exp STN	United States	Record low maximum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Riverton	United States	Record high minimum temperature	14.4 C (57.9 F)	28 of 100 (Routine)
Britannia Beach Furry Cr	Canada	Record low minimum temperature	6.1 C (43.0 F)	27 of 100 (Routine)
Craig	United States	Record high minimum temperature	15.0 C (59.0 F)	27 of 100 (Routine)
Grapeview 3 SW	United States	Record low minimum temperature	6.1 C (43.0 F)	27 of 100 (Routine)
Ingenio Tamazula	Mexico	Record low minimum temperature	13.9 C (57.0 F)	26 of 100 (Routine)
Glacier Rs	United States	Record low minimum temperature	3.3 C (37.9 F)	26 of 100 (Routine)
Cowichan Bay Cherry Point	Canada	Record low minimum temperature	7.8 C (46.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

438 records

Records set or tied on 21 August 1973 by type: Highest daily maximum 41, Lowest daily maximum 91, Highest daily minimum 77, Lowest daily minimum 96, Heaviest daily rainfall 133.

Records on 21 August 1973 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	91
Highest daily minimum	77
Lowest daily minimum	96
Heaviest daily rainfall	133
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1973 by timescale: all-time 0, monthly 10, daily 428.

How Much Records Were Beaten By

341 broken records

Margins by which the 341 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 135.4. Ties are not counted.

Top 20 by Significance

21 August 1973

Top 20 records on 21 August 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1973	Solomons, US	daily rain	108.5 mm (4.3 in)	68.9 mm (2.7 in)	38 years	59 of 100 (Notable)
21 August 1973	Tenosique (Smn), MX	daily rain	166.4 mm (6.6 in)	135.4 mm (5.3 in)	46 years	58 of 100 (Notable)
21 August 1973	Jaguarari, BR	monthly rain	44.1 mm (1.7 in)	16.1 mm (0.6 in)	38 years	54 of 100 (Notable)
21 August 1973	Heber, US	daily rain	26.4 mm (1.0 in)	17.3 mm (0.7 in)	26 years	51 of 100 (Notable)
21 August 1973	Irara, BR	daily rain	40.0 mm (1.6 in)	19.4 mm (0.8 in)	14 years	49 of 100 (Notable)
21 August 1973	Vjazemskaja, RU	daily rain	69.3 mm (2.7 in)	56.1 mm (2.2 in)	20 years	49 of 100 (Notable)
21 August 1973	Kasilof 3 NW, US	daily rain	31.5 mm (1.2 in)	19.3 mm (0.8 in)	28 years	48 of 100 (Notable)
21 August 1973	Joinville (Rvpsc), BR	daily rain	51.0 mm (2.0 in)	42.6 mm (1.7 in)	30 years	47 of 100 (Notable)
21 August 1973	Villahermosa (Smn), MX	daily rain	95.8 mm (3.8 in)	55.9 mm (2.2 in)	44 years	46 of 100 (Notable)
21 August 1973	Elko Rgnl AP, US	monthly high min	20.0 C (68.0 F)	0.6 C (1.1 F)	84 years	44 of 100 (Notable)
21 August 1973	Talkeetna AP, US	daily rain	47.5 mm (1.9 in)	24.1 mm (0.9 in)	44 years	44 of 100 (Notable)
21 August 1973	Jacobina, BR	daily rain	46.8 mm (1.8 in)	33.1 mm (1.3 in)	2 years	43 of 100 (Notable)
21 August 1973	Tierra Amarilla 4 N, US	daily rain	36.1 mm (1.4 in)	26.2 mm (1.0 in)	22 years	43 of 100 (Notable)
21 August 1973	Quantico 1 S, US	daily rain	64.0 mm (2.5 in)	32.2 mm (1.3 in)	67 years	43 of 100 (Notable)
21 August 1973	Kendall 2 E, US	daily rain	73.7 mm (2.9 in)	48.3 mm (1.9 in)	12 years	39 of 100 (Notable)
21 August 1973	Jacobina, BR	monthly rain	47.4 mm (1.9 in)	4.5 mm (0.18 in)	49 years	38 of 100 (Notable)
21 August 1973	Ft Pierce, US	daily low max	28.3 C (82.9 F)	1.7 C (3.1 F)	72 years	38 of 100 (Notable)
21 August 1973	El Salto (Smn), MX	daily high min	15.6 C (60.1 F)	3.9 C (7.0 F)	42 years	37 of 100 (Notable)
21 August 1973	Kotel'nikovo, RU	daily rain	31.2 mm (1.2 in)	20.4 mm (0.8 in)	19 years	37 of 100 (Notable)
21 August 1973	Ft Ross, US	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	74 years	37 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

1800 to 1973

Records set or tied on this calendar date in each year from 1800 to 1973. 1973 had 438 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1973-08-21: 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	321
20 to 40	12
40 to 60	6
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	1