Weather Records on 20 August 1973

490 weather records were set or tied worldwide on 20 August 1973. Highest significance: Westfield 2 SSE, US.

Key Facts for 20 August 1973

On 20 August 1973, 490 weather records were set or tied at long-record stations worldwide.
168 were record highs and 140 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 12 monthly and 477 daily.
Westfield 2 SSE set a daily record precipitation of 59.2 mm (2.3 in) on 20 August 1973.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 455 records.

Record Map

490 stations

490 station records on 20 August 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Westfield 2 SSE	United States	Record daily precipitation	59.2 mm (2.3 in)	61 of 100 (Major)
Lilydale	Australia	Record daily precipitation	29.0 mm (1.1 in)	57 of 100 (Notable)
Monte Santo	Brazil	Record daily precipitation	95.0 mm (3.7 in)	56 of 100 (Notable)
El Carmen (Smn)	Mexico	Record daily precipitation	161.8 mm (6.4 in)	54 of 100 (Notable)
Blagodarnyj	Russia	Record daily precipitation	36.6 mm (1.4 in)	53 of 100 (Notable)
Foleyet	Canada	Record daily precipitation	37.8 mm (1.5 in)	50 of 100 (Notable)
Champoton (Smn)	Mexico	Record daily precipitation	87.9 mm (3.5 in)	48 of 100 (Notable)
Cicero Dantas	Brazil	Record daily precipitation	49.0 mm (1.9 in)	47 of 100 (Notable)
Semijarka	Kazakhstan	Record daily precipitation	26.9 mm (1.1 in)	47 of 100 (Notable)
Chaplyne	Ukraine	Record daily precipitation	73.5 mm (2.9 in)	47 of 100 (Notable)
Seymour (Mag)	South Africa	Record daily precipitation	28.5 mm (1.1 in)	43 of 100 (Notable)
Laborare	South Africa	Record daily precipitation	27.5 mm (1.1 in)	43 of 100 (Notable)
Kenton	United States	Record daily precipitation	35.3 mm (1.4 in)	43 of 100 (Notable)
Tobias Barreto	Brazil	Record daily precipitation	28.0 mm (1.1 in)	40 of 100 (Notable)
Euclides da Cunha (Cumbe)	Brazil	Record daily precipitation	35.2 mm (1.4 in)	39 of 100 (Notable)
Niagara Falls	Canada	Record daily precipitation	37.8 mm (1.5 in)	39 of 100 (Notable)
Sredny Vasjugan	Russia	Record daily precipitation	41.3 mm (1.6 in)	39 of 100 (Notable)
Illahe	United States	Record low minimum temperature	1.7 C (35.1 F)	39 of 100 (Notable)
Holland Wtp	United States	Record daily precipitation	57.7 mm (2.3 in)	37 of 100 (Notable)
Freiburg	Germany	Record high minimum temperature	21.5 C (70.7 F)	36 of 100 (Notable)
Gyshgy	Turkmenistan	Record high minimum temperature	24.4 C (75.9 F)	36 of 100 (Notable)
Walterboro 1 SW	United States	Record daily precipitation	46.5 mm (1.8 in)	35 of 100 (Notable)
Frei Paulo	Brazil	Record daily precipitation	37.6 mm (1.5 in)	34 of 100 (Routine)
Entrance	Canada	Record low minimum temperature	-4.4 C (24.1 F)	34 of 100 (Routine)
Barrage Angliers	Canada	Record daily precipitation	63.0 mm (2.5 in)	34 of 100 (Routine)
Parabel'	Russia	Record daily precipitation	32.3 mm (1.3 in)	34 of 100 (Routine)
Jemez Springs	United States	Record low minimum temperature	4.4 C (39.9 F)	34 of 100 (Routine)
Mirandela	Brazil	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Britannia Beach Furry Cr	Canada	Record low minimum temperature	5.6 C (42.1 F)	33 of 100 (Routine)
Bloomingdale	United States	Record daily precipitation	48.0 mm (1.9 in)	33 of 100 (Routine)
Holy Cross	United States	Record daily precipitation	26.7 mm (1.1 in)	33 of 100 (Routine)
El-Golea	Algeria	Record low minimum temperature	19.3 C (66.7 F)	32 of 100 (Routine)
Pacatuba (Pacatiba)	Brazil	Record daily precipitation	43.5 mm (1.7 in)	32 of 100 (Routine)
Deloraine	Canada	Record daily precipitation	44.5 mm (1.8 in)	32 of 100 (Routine)
Virtsu	Estonia	Record daily precipitation	26.9 mm (1.1 in)	32 of 100 (Routine)
San Andres	Mexico	Record daily precipitation	129.3 mm (5.1 in)	32 of 100 (Routine)
Lumpkin 2 SE	United States	Record low minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Aquidaba	Brazil	Record daily precipitation	25.0 mm (1.0 in)	31 of 100 (Routine)
Claremont Pomona Clg	United States	Record high minimum temperature	21.7 C (71.1 F)	31 of 100 (Routine)
Oelrichs	United States	Record high maximum temperature	40.6 C (105.1 F)	31 of 100 (Routine)
New Liskeard	Canada	Record daily precipitation	36.3 mm (1.4 in)	30 of 100 (Routine)
Vernal	United States	Record high maximum temperature	35.0 C (95.0 F)	30 of 100 (Routine)
Ocosingo	Mexico	Record daily precipitation	96.8 mm (3.8 in)	29 of 100 (Routine)
Kolpasevo	Russia	Record daily precipitation	51.9 mm (2.0 in)	29 of 100 (Routine)
Nizhni Sirohozy	Ukraine	Record daily precipitation	25.1 mm (1.0 in)	29 of 100 (Routine)
Cottonwood 2 E	United States	Record high maximum temperature	42.8 C (109.0 F)	29 of 100 (Routine)
Kemmerer 2N	United States	Record high maximum temperature	30.0 C (86.0 F)	29 of 100 (Routine)
Yatchaw (Amaroo)	Australia	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Las Vigas	Mexico	Record daily precipitation	54.9 mm (2.2 in)	28 of 100 (Routine)
Sheffield	United Kingdom	Record low maximum temperature	14.0 C (57.2 F)	28 of 100 (Routine)
Ignacio 1 N	United States	Record high maximum temperature	35.6 C (96.1 F)	28 of 100 (Routine)
Tanana AP	United States	Record high minimum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
San Pedro Chenalho (Smn)	Mexico	Record daily precipitation	48.8 mm (1.9 in)	27 of 100 (Routine)
Hillsboro	United States	Record high minimum temperature	24.4 C (75.9 F)	27 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	35.0 C (95.0 F)	27 of 100 (Routine)
Stuttgart-Stadt	Germany	Record high minimum temperature	20.0 C (68.0 F)	26 of 100 (Routine)
Kr. Ravensburg Weingarten	Germany	Record daily precipitation	48.6 mm (1.9 in)	26 of 100 (Routine)
Champoton (Smn)	Mexico	Record low maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Allegan 5NE	United States	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Hilland 2 NW	United States	Record high maximum temperature	40.6 C (105.1 F)	26 of 100 (Routine)

Counts by Type and Timescale

490 records

Records set or tied on 20 August 1973 by type: Highest daily maximum 76, Lowest daily maximum 43, Highest daily minimum 92, Lowest daily minimum 97, Heaviest daily rainfall 182.

Records on 20 August 1973 by type
Record type	Records
Highest daily maximum	76
Lowest daily maximum	43
Highest daily minimum	92
Lowest daily minimum	97
Heaviest daily rainfall	182
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1973 by timescale: all-time 1, monthly 12, daily 477.

How Much Records Were Beaten By

380 broken records

Margins by which the 380 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 108.0. Ties are not counted.

Top 20 by Significance

20 August 1973

Top 20 records on 20 August 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1973	Westfield 2 SSE, US	daily rain	59.2 mm (2.3 in)	43.2 mm (1.7 in)	72 years	61 of 100 (Major)
20 August 1973	Lilydale, AU	daily rain	29.0 mm (1.1 in)	19.9 mm (0.8 in)	43 years	57 of 100 (Notable)
20 August 1973	Monte Santo, BR	monthly rain	95.0 mm (3.7 in)	38.0 mm (1.5 in)	0 years	56 of 100 (Notable)
20 August 1973	El Carmen (Smn), MX	daily rain	161.8 mm (6.4 in)	108.0 mm (4.3 in)	35 years	54 of 100 (Notable)
20 August 1973	Blagodarnyj, RU	daily rain	36.6 mm (1.4 in)	31.0 mm (1.2 in)	35 years	53 of 100 (Notable)
20 August 1973	Foleyet, CA	daily rain	37.8 mm (1.5 in)	27.6 mm (1.1 in)	28 years	50 of 100 (Notable)
20 August 1973	Champoton (Smn), MX	daily rain	87.9 mm (3.5 in)	63.0 mm (2.5 in)	22 years	48 of 100 (Notable)
20 August 1973	Cicero Dantas, BR	daily rain	49.0 mm (1.9 in)	22.7 mm (0.9 in)	40 years	47 of 100 (Notable)
20 August 1973	Semijarka, KZ	daily rain	26.9 mm (1.1 in)	17.0 mm (0.7 in)	35 years	47 of 100 (Notable)
20 August 1973	Chaplyne, UA	daily rain	73.5 mm (2.9 in)	68.5 mm (2.7 in)	15 years	47 of 100 (Notable)
20 August 1973	Seymour (Mag), ZA	daily rain	28.5 mm (1.1 in)	10.7 mm (0.4 in)	81 years	43 of 100 (Notable)
20 August 1973	Laborare, ZA	daily rain	27.5 mm (1.1 in)	15.8 mm (0.6 in)	56 years	43 of 100 (Notable)
20 August 1973	Kenton, US	daily rain	35.3 mm (1.4 in)	17.5 mm (0.7 in)	68 years	43 of 100 (Notable)
20 August 1973	Tobias Barreto, BR	daily rain	28.0 mm (1.1 in)	11.6 mm (0.5 in)	40 years	40 of 100 (Notable)
20 August 1973	Euclides da Cunha (Cumbe), BR	daily rain	35.2 mm (1.4 in)	12.2 mm (0.5 in)	40 years	39 of 100 (Notable)
20 August 1973	Niagara Falls, CA	daily rain	37.8 mm (1.5 in)	20.0 mm (0.8 in)	59 years	39 of 100 (Notable)
20 August 1973	Sredny Vasjugan, RU	daily rain	41.3 mm (1.6 in)	20.3 mm (0.8 in)	8 years	39 of 100 (Notable)
20 August 1973	Illahe, US	daily low min	1.7 C (35.1 F)	6.1 C (11.0 F)	30 years	39 of 100 (Notable)
20 August 1973	Holland Wtp, US	daily rain	57.7 mm (2.3 in)	24.4 mm (1.0 in)	36 years	37 of 100 (Notable)
20 August 1973	Freiburg, DE	daily high min	21.5 C (70.7 F)	1.2 C (2.2 F)	79 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

1797 to 1973

Records set or tied on this calendar date in each year from 1797 to 1973. 1973 had 490 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 1973-08-20: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	360
20 to 40	14
40 to 60	3
60 to 80	2
80 to 100	0
100 to 120	1