Weather Records on 21 August 2023

1,826 weather records were set or tied worldwide on 21 August 2023. Highest significance: Big Tujunga Dam Fc46, US.

Key Facts for 21 August 2023

On 21 August 2023, 1,826 weather records were set or tied at long-record stations worldwide.
1,240 were record highs and 303 were record lows, counting maximum and minimum temperature.
By timescale, 14 were all-time records, 102 monthly and 1,710 daily.
Big Tujunga Dam Fc46 set a monthly record daily precipitation of 122.7 mm (4.8 in) on 21 August 2023.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 442 records.

Record Map

1,826 stations

1,826 station records on 21 August 2023 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 2023: highest significance records shown on the map
Station	Country	Type	Value	Significance
Big Tujunga Dam Fc46	United States	Record daily precipitation	122.7 mm (4.8 in)	83 of 100 (Exceptional)
Trona	United States	Record daily precipitation	88.9 mm (3.5 in)	81 of 100 (Exceptional)
Redlands	United States	Record daily precipitation	39.9 mm (1.6 in)	80 of 100 (Exceptional)
Covina City Yard Fc387B	United States	Record daily precipitation	53.3 mm (2.1 in)	76 of 100 (Major)
Altadena	United States	Record daily precipitation	125.7 mm (4.9 in)	73 of 100 (Major)
Fairmont	United States	Record daily precipitation	99.1 mm (3.9 in)	73 of 100 (Major)
San Gabriel Canyon Ph	United States	Record daily precipitation	113.5 mm (4.5 in)	73 of 100 (Major)
San Gabriel Fire Dept	United States	Record daily precipitation	93.7 mm (3.7 in)	73 of 100 (Major)
Ojai	United States	Record daily precipitation	48.8 mm (1.9 in)	72 of 100 (Major)
Pasadena	United States	Record daily precipitation	86.6 mm (3.4 in)	71 of 100 (Major)
Tejon Rancho	United States	Record daily precipitation	73.7 mm (2.9 in)	71 of 100 (Major)
Pacoima Dam Fc33A-E	United States	Record daily precipitation	142.5 mm (5.6 in)	70 of 100 (Major)
Silverpeak	United States	Record daily precipitation	76.5 mm (3.0 in)	70 of 100 (Major)
Tonopah	United States	Record daily precipitation	65.3 mm (2.6 in)	70 of 100 (Major)
Piru 2 ESE	United States	Record daily precipitation	106.2 mm (4.2 in)	69 of 100 (Major)
Great Basin Np	United States	Record daily precipitation	106.7 mm (4.2 in)	68 of 100 (Major)
McCall	United States	Record daily precipitation	49.8 mm (2.0 in)	67 of 100 (Major)
Aunet	Norway	Record daily precipitation	44.6 mm (1.8 in)	66 of 100 (Major)
Vista	United States	Record daily precipitation	27.2 mm (1.1 in)	65 of 100 (Major)
Dry Tortugas	United States	Record daily precipitation	95.5 mm (3.8 in)	65 of 100 (Major)
Mt Charleston Fire STN	United States	Record daily precipitation	139.7 mm (5.5 in)	64 of 100 (Major)
Baker City AP	United States	Record daily precipitation	35.6 mm (1.4 in)	64 of 100 (Major)
Cuyamaca	United States	Record daily precipitation	101.3 mm (4.0 in)	63 of 100 (Major)
Adin Mtn	United States	Record daily precipitation	35.6 mm (1.4 in)	62 of 100 (Major)
Riverside Fire STN 3	United States	Record daily precipitation	46.0 mm (1.8 in)	61 of 100 (Major)
U C L A	United States	Record daily precipitation	53.8 mm (2.1 in)	61 of 100 (Major)
Kanchanaburi	Thailand	Record daily precipitation	75.9 mm (3.0 in)	60 of 100 (Major)
Deep Canyon Lab	United States	Record daily precipitation	123.4 mm (4.9 in)	60 of 100 (Major)
Victorville	United States	Record daily precipitation	51.1 mm (2.0 in)	59 of 100 (Notable)
Howe	United States	Record daily precipitation	37.3 mm (1.5 in)	59 of 100 (Notable)
Aspendell	United States	Record low maximum temperature	7.8 C (46.0 F)	58 of 100 (Notable)
Palmdale	United States	Record daily precipitation	33.8 mm (1.3 in)	58 of 100 (Notable)
Palomar Mtn Obsy	United States	Record daily precipitation	87.1 mm (3.4 in)	58 of 100 (Notable)
Eureka	United States	Record daily precipitation	29.5 mm (1.2 in)	58 of 100 (Notable)
Pahrump 4 NW	United States	Record daily precipitation	36.8 mm (1.4 in)	58 of 100 (Notable)
Galena Summit	United States	Record daily precipitation	45.7 mm (1.8 in)	58 of 100 (Notable)
Aspendell	United States	Record daily precipitation	36.6 mm (1.4 in)	56 of 100 (Notable)
Mecca Fire STN	United States	Record daily precipitation	63.5 mm (2.5 in)	56 of 100 (Notable)
Secesh Summit	United States	Record daily precipitation	53.3 mm (2.1 in)	56 of 100 (Notable)
Buckskin Lower	United States	Record daily precipitation	30.5 mm (1.2 in)	56 of 100 (Notable)
Granite Peak	United States	Record daily precipitation	35.6 mm (1.4 in)	56 of 100 (Notable)
Snow Mountain	United States	Record daily precipitation	30.5 mm (1.2 in)	56 of 100 (Notable)
Palos Verdes Es Fc43D	United States	Record daily precipitation	70.9 mm (2.8 in)	55 of 100 (Notable)
Quartz Mountain	United States	Record daily precipitation	27.9 mm (1.1 in)	55 of 100 (Notable)
Pearblossom	United States	Record daily precipitation	43.4 mm (1.7 in)	54 of 100 (Notable)
Vienna Mine	United States	Record daily precipitation	53.3 mm (2.1 in)	54 of 100 (Notable)
Henshaw Dam	United States	Record daily precipitation	51.3 mm (2.0 in)	53 of 100 (Notable)
Mina	United States	Record daily precipitation	38.1 mm (1.5 in)	53 of 100 (Notable)
Fallon Naas	United States	Record daily precipitation	26.4 mm (1.0 in)	53 of 100 (Notable)
San Gabriel Dam Fc425B-E	United States	Record daily precipitation	147.3 mm (5.8 in)	51 of 100 (Notable)
Upton	United States	Record high maximum temperature	39.4 C (102.9 F)	51 of 100 (Notable)
Eagle Mtn	United States	Record daily precipitation	30.5 mm (1.2 in)	50 of 100 (Notable)
Aneroid Lake #2	United States	Record daily precipitation	50.8 mm (2.0 in)	50 of 100 (Notable)
Big Creek Sum	United States	Record daily precipitation	35.6 mm (1.4 in)	50 of 100 (Notable)
Lake Creek R.S.	United States	Record daily precipitation	25.4 mm (1.0 in)	50 of 100 (Notable)
Halfway	United States	Record daily precipitation	64.8 mm (2.6 in)	49 of 100 (Notable)
El Dorado	United States	Record high maximum temperature	43.3 C (109.9 F)	48 of 100 (Notable)
Tonopah	United States	Record low maximum temperature	18.3 C (64.9 F)	48 of 100 (Notable)
Kealakekua 26.2	United States	Record low minimum temperature	11.1 C (52.0 F)	48 of 100 (Notable)
Du Quoin 4 SE	United States	Record high minimum temperature	26.7 C (80.1 F)	47 of 100 (Notable)

Counts by Type and Timescale

1,826 records

Records set or tied on 21 August 2023 by type: Highest daily maximum 472, Lowest daily maximum 280, Highest daily minimum 768, Lowest daily minimum 23, Heaviest daily rainfall 283.

Records on 21 August 2023 by type
Record type	Records
Highest daily maximum	472
Lowest daily maximum	280
Highest daily minimum	768
Lowest daily minimum	23
Heaviest daily rainfall	283
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 2023 by timescale: all-time 14, monthly 102, daily 1,710.

How Much Records Were Beaten By

1,489 broken records

Margins by which the 1,489 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 93.7. Ties are not counted.

Top 20 by Significance

21 August 2023

Top 20 records on 21 August 2023 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 2023	Big Tujunga Dam Fc46, US	monthly rain	122.7 mm (4.8 in)	90.9 mm (3.6 in)	81 years	83 of 100 (Exceptional)
21 August 2023	Trona, US	all-time rain	88.9 mm (3.5 in)	31.7 mm (1.2 in)	39 years	81 of 100 (Exceptional)
21 August 2023	Redlands, US	daily rain	39.9 mm (1.6 in)	33.5 mm (1.3 in)	109 years	80 of 100 (Exceptional)
21 August 2023	Covina City Yard Fc387B, US	daily rain	53.3 mm (2.1 in)	53.3 mm (2.1 in)	92 years	76 of 100 (Major)
21 August 2023	Altadena, US	monthly rain	125.7 mm (4.9 in)	68.0 mm (2.7 in)	46 years	73 of 100 (Major)
21 August 2023	Fairmont, US	monthly rain	99.1 mm (3.9 in)	62.0 mm (2.4 in)	46 years	73 of 100 (Major)
21 August 2023	San Gabriel Canyon Ph, US	monthly rain	113.5 mm (4.5 in)	51.3 mm (2.0 in)	46 years	73 of 100 (Major)
21 August 2023	San Gabriel Fire Dept, US	daily rain	93.7 mm (3.7 in)	93.7 mm (3.7 in)	84 years	73 of 100 (Major)
21 August 2023	Ojai, US	monthly rain	48.8 mm (1.9 in)	24.2 mm (1.0 in)	40 years	72 of 100 (Major)
21 August 2023	Pasadena, US	monthly rain	86.6 mm (3.4 in)	31.7 mm (1.2 in)	46 years	71 of 100 (Major)
21 August 2023	Tejon Rancho, US	monthly rain	73.7 mm (2.9 in)	39.7 mm (1.6 in)	40 years	71 of 100 (Major)
21 August 2023	Pacoima Dam Fc33A-E, US	monthly rain	142.5 mm (5.6 in)	88.1 mm (3.5 in)	40 years	70 of 100 (Major)
21 August 2023	Silverpeak, US	all-time rain	76.5 mm (3.0 in)	19.3 mm (0.8 in)	48 years	70 of 100 (Major)
21 August 2023	Tonopah, US	all-time rain	65.3 mm (2.6 in)	25.9 mm (1.0 in)	7 years	70 of 100 (Major)
21 August 2023	Piru 2 ESE, US	monthly rain	106.2 mm (4.2 in)	67.3 mm (2.6 in)	46 years	69 of 100 (Major)
21 August 2023	Great Basin Np, US	all-time rain	106.7 mm (4.2 in)	58.4 mm (2.3 in)	18 years	68 of 100 (Major)
21 August 2023	McCall, US	monthly rain	49.8 mm (2.0 in)	10.2 mm (0.4 in)	97 years	67 of 100 (Major)
21 August 2023	Aunet, NO	daily rain	44.6 mm (1.8 in)	17.7 mm (0.7 in)	116 years	66 of 100 (Major)
21 August 2023	Vista, US	daily rain	27.2 mm (1.1 in)	27.2 mm (1.1 in)	65 years	65 of 100 (Major)
21 August 2023	Dry Tortugas, US	daily rain	95.5 mm (3.8 in)	61.5 mm (2.4 in)	60 years	65 of 100 (Major)

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 2023

Records set or tied on this calendar date in each year from 1800 to 2023. 2023 had 1,826 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	1,290

Download the Data

Data for records on 2023-08-21: 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 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Histogram of margins by which records were beaten on 21 August 2023
Margin	Records
0 to 20	1,430
20 to 40	39
40 to 60	12
60 to 80	5
80 to 100	3