Weather Records on 21 August 1947

954 weather records were set or tied worldwide on 21 August 1947. Highest significance: Porbandar, IN.

Key Facts for 21 August 1947

On 21 August 1947, 954 weather records were set or tied at long-record stations worldwide.
571 were record highs and 207 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 12 monthly and 941 daily.
Porbandar set a monthly record daily precipitation of 254.5 mm (10.0 in) on 21 August 1947.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 447 records.

Record Map

954 stations

954 station records on 21 August 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Porbandar	India	Record daily precipitation	254.5 mm (10.0 in)	67 of 100 (Major)
Veraval	India	Record daily precipitation	196.3 mm (7.7 in)	57 of 100 (Notable)
Addanki	India	Record daily precipitation	129.0 mm (5.1 in)	55 of 100 (Notable)
Dhoraji	India	Record daily precipitation	141.2 mm (5.6 in)	55 of 100 (Notable)
Clear Spring 1 ENE	United States	Record daily precipitation	53.3 mm (2.1 in)	48 of 100 (Notable)
Ratnagiri	India	Record daily precipitation	134.6 mm (5.3 in)	47 of 100 (Notable)
Anjar	India	Record daily precipitation	108.0 mm (4.3 in)	44 of 100 (Notable)
Gondal	India	Record daily precipitation	90.4 mm (3.6 in)	44 of 100 (Notable)
Mummidivaram	India	Record daily precipitation	143.5 mm (5.6 in)	43 of 100 (Notable)
Gudauri	Georgia	Record daily precipitation	53.4 mm (2.1 in)	42 of 100 (Notable)
Calliope Post Office	Australia	Record daily precipitation	31.5 mm (1.2 in)	41 of 100 (Notable)
New Castle 1 N	United States	Record daily precipitation	47.8 mm (1.9 in)	41 of 100 (Notable)
Shahabad	India	Record daily precipitation	108.0 mm (4.3 in)	39 of 100 (Notable)
Avon	United States	Record daily precipitation	47.5 mm (1.9 in)	36 of 100 (Notable)
Bustard Head Lighthouse	Australia	Record daily precipitation	31.8 mm (1.3 in)	35 of 100 (Notable)
Williams	United States	Record daily precipitation	44.5 mm (1.8 in)	34 of 100 (Routine)
Austin #2	United States	Record low maximum temperature	16.7 C (62.1 F)	34 of 100 (Routine)
Tropic	United States	Record low maximum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Eumundi - Crescent Rd	Australia	Record daily precipitation	39.1 mm (1.5 in)	33 of 100 (Routine)
Britton	United States	Record high minimum temperature	25.0 C (77.0 F)	33 of 100 (Routine)
Raglan	Australia	Record daily precipitation	32.8 mm (1.3 in)	32 of 100 (Routine)
Redding Fire STN 2	United States	Record low maximum temperature	22.2 C (72.0 F)	31 of 100 (Routine)
Belle Fourche	United States	Record high minimum temperature	23.3 C (73.9 F)	31 of 100 (Routine)
Peddapuram	India	Record daily precipitation	76.2 mm (3.0 in)	30 of 100 (Routine)
Wadhwan	India	Record daily precipitation	76.5 mm (3.0 in)	30 of 100 (Routine)
Tamarack	United States	Record low maximum temperature	7.8 C (46.0 F)	30 of 100 (Routine)
Aberdeen	United States	Record high minimum temperature	24.4 C (75.9 F)	30 of 100 (Routine)
Le Bourget	France	Record daily precipitation	33.5 mm (1.3 in)	29 of 100 (Routine)
Lake Konomoc	United States	Record daily precipitation	43.2 mm (1.7 in)	29 of 100 (Routine)
Long Prairie	United States	Record high maximum temperature	36.1 C (97.0 F)	29 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high minimum temperature	22.2 C (72.0 F)	29 of 100 (Routine)
Ft Yates 4 SW	United States	Record high maximum temperature	41.1 C (106.0 F)	29 of 100 (Routine)
Huron Rgnl AP	United States	Record high minimum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Jafrabad	India	Record daily precipitation	45.0 mm (1.8 in)	28 of 100 (Routine)
Upper Lake 2 N	United States	Record low minimum temperature	2.2 C (36.0 F)	28 of 100 (Routine)
Huntingdon	United States	Record daily precipitation	35.3 mm (1.4 in)	28 of 100 (Routine)
Blanding	United States	Record daily precipitation	38.4 mm (1.5 in)	28 of 100 (Routine)
Port Townsend	United States	Record low minimum temperature	4.4 C (39.9 F)	28 of 100 (Routine)
Owen Sound	Canada	Record high minimum temperature	21.1 C (70.0 F)	27 of 100 (Routine)
Pilot Rock 1 SE	United States	Record low maximum temperature	20.0 C (68.0 F)	27 of 100 (Routine)
Forestburg 4 NNE	United States	Record high minimum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Petropavlovskij Majak	Russia	Record daily precipitation	36.3 mm (1.4 in)	26 of 100 (Routine)
Petropavlovsk-Kamchatskij	Russia	Record daily precipitation	36.3 mm (1.4 in)	26 of 100 (Routine)
Dudleys	United States	Record low maximum temperature	20.6 C (69.1 F)	26 of 100 (Routine)
Upper Lake 2 N	United States	Record low maximum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Visalia	United States	Record low maximum temperature	27.2 C (81.0 F)	26 of 100 (Routine)
Astoria	United States	Record low minimum temperature	7.2 C (45.0 F)	26 of 100 (Routine)
Eureka	United States	Record high minimum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Faulkton	United States	Record high minimum temperature	26.1 C (79.0 F)	26 of 100 (Routine)
Midland 4 ENE	United States	Record low minimum temperature	12.2 C (54.0 F)	26 of 100 (Routine)
Manitowoc	United States	Record daily precipitation	27.7 mm (1.1 in)	26 of 100 (Routine)
Tewantin Post Office	Australia	Record daily precipitation	27.7 mm (1.1 in)	25 of 100 (Routine)
Bannockburn	Australia	Record daily precipitation	25.4 mm (1.0 in)	25 of 100 (Routine)
Barkerville	Canada	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Mistassini Post	Canada	Record high minimum temperature	22.2 C (72.0 F)	25 of 100 (Routine)
Gisela	United States	Record daily precipitation	31.2 mm (1.2 in)	25 of 100 (Routine)
Redding Fire STN 2	United States	Record low minimum temperature	11.1 C (52.0 F)	25 of 100 (Routine)
Sanborn	United States	Record high minimum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
Harrisville	United States	Record daily precipitation	40.1 mm (1.6 in)	25 of 100 (Routine)
Hillsdale	United States	Record high minimum temperature	23.9 C (75.0 F)	25 of 100 (Routine)

Counts by Type and Timescale

954 records

Records set or tied on 21 August 1947 by type: Highest daily maximum 213, Lowest daily maximum 128, Highest daily minimum 358, Lowest daily minimum 79, Heaviest daily rainfall 176.

Records on 21 August 1947 by type
Record type	Records
Highest daily maximum	213
Lowest daily maximum	128
Highest daily minimum	358
Lowest daily minimum	79
Heaviest daily rainfall	176
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1947 by timescale: all-time 1, monthly 12, daily 941.

How Much Records Were Beaten By

738 broken records

Margins by which the 738 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 177.0. Ties are not counted.

Top 20 by Significance

21 August 1947

Top 20 records on 21 August 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1947	Porbandar, IN	monthly rain	254.5 mm (10.0 in)	124.2 mm (4.9 in)	44 years	67 of 100 (Major)
21 August 1947	Veraval, IN	daily rain	196.3 mm (7.7 in)	177.0 mm (7.0 in)	44 years	57 of 100 (Notable)
21 August 1947	Addanki, IN	daily rain	129.0 mm (5.1 in)	100.8 mm (4.0 in)	36 years	55 of 100 (Notable)
21 August 1947	Dhoraji, IN	daily rain	141.2 mm (5.6 in)	93.4 mm (3.7 in)	38 years	55 of 100 (Notable)
21 August 1947	Clear Spring 1 ENE, US	daily rain	53.3 mm (2.1 in)	36.8 mm (1.4 in)	46 years	48 of 100 (Notable)
21 August 1947	Ratnagiri, IN	daily rain	134.6 mm (5.3 in)	64.2 mm (2.5 in)	44 years	47 of 100 (Notable)
21 August 1947	Anjar, IN	daily rain	108.0 mm (4.3 in)	89.5 mm (3.5 in)	1 year	44 of 100 (Notable)
21 August 1947	Gondal, IN	daily rain	90.4 mm (3.6 in)	68.0 mm (2.7 in)	0 years	44 of 100 (Notable)
21 August 1947	Mummidivaram, IN	daily rain	143.5 mm (5.6 in)	63.2 mm (2.5 in)	33 years	43 of 100 (Notable)
21 August 1947	Gudauri, GE	daily rain	53.4 mm (2.1 in)	25.2 mm (1.0 in)	48 years	42 of 100 (Notable)
21 August 1947	Calliope Post Office, AU	daily rain	31.5 mm (1.2 in)	27.2 mm (1.1 in)	13 years	41 of 100 (Notable)
21 August 1947	New Castle 1 N, US	daily rain	47.8 mm (1.9 in)	28.7 mm (1.1 in)	34 years	41 of 100 (Notable)
21 August 1947	Shahabad, IN	daily rain	108.0 mm (4.3 in)	60.0 mm (2.4 in)	30 years	39 of 100 (Notable)
21 August 1947	Avon, US	daily rain	47.5 mm (1.9 in)	31.5 mm (1.2 in)	20 years	36 of 100 (Notable)
21 August 1947	Bustard Head Lighthouse, AU	daily rain	31.8 mm (1.3 in)	15.5 mm (0.6 in)	52 years	35 of 100 (Notable)
21 August 1947	Williams, US	daily rain	44.5 mm (1.8 in)	25.2 mm (1.0 in)	0 years	34 of 100 (Routine)
21 August 1947	Austin #2, US	daily low max	16.7 C (62.1 F)	5.0 C (9.0 F)	46 years	34 of 100 (Routine)
21 August 1947	Tropic, US	daily low max	17.8 C (64.0 F)	5.5 C (9.9 F)	40 years	34 of 100 (Routine)
21 August 1947	Eumundi - Crescent Rd, AU	daily rain	39.1 mm (1.5 in)	20.0 mm (0.8 in)	30 years	33 of 100 (Routine)
21 August 1947	Britton, US	daily high min	25.0 C (77.0 F)	5.6 C (10.1 F)	53 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

1800 to 1947

Records set or tied on this calendar date in each year from 1800 to 1947. 1947 had 954 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 1947-08-21: 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 25	715
25 to 50	14
50 to 75	4
75 to 100	2
100 to 125	2
125 to 150	0
150 to 175	0
175 to 200	1