Weather Records on 31 August 1921

86 weather records were set or tied worldwide on 31 August 1921. Highest significance: Barcaldine Post Office, AU.

Key Facts for 31 August 1921

On 31 August 1921, 86 weather records were set or tied at long-record stations worldwide.
34 were record highs and 17 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 75 daily.
Barcaldine Post Office set a daily record precipitation of 33.5 mm (1.3 in) on 31 August 1921.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

86 stations

86 station records on 31 August 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Barcaldine Post Office	Australia	Record daily precipitation	33.5 mm (1.3 in)	52 of 100 (Notable)
Aramac Post Office	Australia	Record daily precipitation	31.8 mm (1.3 in)	44 of 100 (Notable)
Rockhampton Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	43 of 100 (Notable)
Springsure Comet St	Australia	Record daily precipitation	61.7 mm (2.4 in)	31 of 100 (Routine)
Uccle	Belgium	Record low minimum temperature	5.8 C (42.4 F)	31 of 100 (Routine)
Pacific Heights	Australia	Record daily precipitation	55.9 mm (2.2 in)	28 of 100 (Routine)
Tambo Post Office	Australia	Record daily precipitation	40.1 mm (1.6 in)	26 of 100 (Routine)
Blackall Township	Australia	Record daily precipitation	56.4 mm (2.2 in)	26 of 100 (Routine)
Alice Post Office	Australia	Record daily precipitation	43.2 mm (1.7 in)	25 of 100 (Routine)
Arnsberg	Germany	Record low minimum temperature	3.5 C (38.3 F)	25 of 100 (Routine)
Tashkent	Uzbekistan	Record low maximum temperature	22.5 C (72.5 F)	25 of 100 (Routine)
Alpha Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	23 of 100 (Routine)
Cet Central England	United Kingdom	Record low minimum temperature	3.8 C (38.8 F)	23 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	34.4 C (93.9 F)	22 of 100 (Routine)
Emu Park Hill St	Australia	Record daily precipitation	30.5 mm (1.2 in)	21 of 100 (Routine)
Baltimore Customs House	United States	Record high minimum temperature	23.9 C (75.0 F)	21 of 100 (Routine)
Muttaburra	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Ulan-Ude	Russia	Record daily precipitation	24.7 mm (1.0 in)	20 of 100 (Routine)
Pentland Post Office	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Little Rock St Capitol	United States	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Algiers-Ville/Universite	Algeria	Record daily precipitation	1.7 mm (0.07 in)	20 of 100 (Routine)
Bogantungan Post Office	Australia	Record daily precipitation	54.9 mm (2.2 in)	20 of 100 (Routine)
Weldon	United States	Record high maximum temperature	37.2 C (99.0 F)	19 of 100 (Routine)
Rolleston	Australia	Record daily precipitation	19.1 mm (0.8 in)	18 of 100 (Routine)
Isisford Post Office	Australia	Record daily precipitation	5.6 mm (0.22 in)	18 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	18.8 mm (0.7 in)	17 of 100 (Routine)
Lowell	United States	Record high maximum temperature	33.3 C (91.9 F)	17 of 100 (Routine)
Emerald Post Office	Australia	Record daily precipitation	15.2 mm (0.6 in)	16 of 100 (Routine)
Eulo Post Office	Australia	Record daily precipitation	20.1 mm (0.8 in)	16 of 100 (Routine)
Heinersreuth-Vollhof	Germany	Record low minimum temperature	3.9 C (39.0 F)	16 of 100 (Routine)
Stockholm	Sweden	Record low maximum temperature	11.0 C (51.8 F)	16 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	12.5 C (54.5 F)	15 of 100 (Routine)
Minnedosa	Canada	Record high minimum temperature	19.4 C (66.9 F)	14 of 100 (Routine)
St Albans	Canada	Record high maximum temperature	37.2 C (99.0 F)	14 of 100 (Routine)
Plymouth	United States	Record high minimum temperature	17.8 C (64.0 F)	14 of 100 (Routine)
Syktyvkar	Russia	Record daily precipitation	9.6 mm (0.38 in)	13 of 100 (Routine)
Sandy Cape Lighthouse	Australia	Record daily precipitation	29.7 mm (1.2 in)	12 of 100 (Routine)
Bancroft	Canada	Record high minimum temperature	13.9 C (57.0 F)	12 of 100 (Routine)
Muenster	Germany	Record low minimum temperature	5.1 C (41.2 F)	12 of 100 (Routine)
Cottbus	Germany	Record low minimum temperature	6.6 C (43.9 F)	12 of 100 (Routine)
Newport	United States	Record high minimum temperature	23.9 C (75.0 F)	12 of 100 (Routine)
Harrisburg - Coop	United States	Record high minimum temperature	23.3 C (73.9 F)	12 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	23.9 C (75.0 F)	12 of 100 (Routine)
Forest Vale	Australia	Record daily precipitation	14.5 mm (0.6 in)	11 of 100 (Routine)
Enisejsk	Russia	Record low minimum temperature	0.0 C (32.0 F)	11 of 100 (Routine)
Lake Cochituate	United States	Record high maximum temperature	33.3 C (91.9 F)	11 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	32.2 C (90.0 F)	11 of 100 (Routine)
Haparanda	Sweden	Record daily precipitation	13.7 mm (0.5 in)	10 of 100 (Routine)
Newport	United States	Record daily precipitation	7.4 mm (0.29 in)	10 of 100 (Routine)
Lowell	United States	Record high minimum temperature	20.6 C (69.1 F)	10 of 100 (Routine)
Crookston NW Exp STN	United States	Record high maximum temperature	33.9 C (93.0 F)	10 of 100 (Routine)
Cardwell Marine Pde	Australia	Record daily precipitation	5.8 mm (0.23 in)	9 of 100 (Routine)
St Lawrence Post Office	Australia	Record daily precipitation	11.4 mm (0.4 in)	9 of 100 (Routine)
Bamberg	Germany	Record low minimum temperature	3.6 C (38.5 F)	9 of 100 (Routine)
Alma	United States	Record high minimum temperature	19.4 C (66.9 F)	9 of 100 (Routine)
Hillgrove (Hillview)	Australia	Record daily precipitation	10.4 mm (0.4 in)	8 of 100 (Routine)
Battleford	Canada	Record high maximum temperature	32.2 C (90.0 F)	8 of 100 (Routine)
Vestervig	Denmark	Record low maximum temperature	13.1 C (55.6 F)	8 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record high maximum temperature	34.4 C (93.9 F)	7 of 100 (Routine)
Alton	Canada	Record high minimum temperature	16.1 C (61.0 F)	7 of 100 (Routine)

Counts by Type and Timescale

86 records

Records set or tied on 31 August 1921 by type: Highest daily maximum 15, Lowest daily maximum 4, Highest daily minimum 19, Lowest daily minimum 13, Heaviest daily rainfall 35.

Records on 31 August 1921 by type
Record type	Records
Highest daily maximum	15
Lowest daily maximum	4
Highest daily minimum	19
Lowest daily minimum	13
Heaviest daily rainfall	35
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 1921 by timescale: all-time 0, monthly 11, daily 75.

How Much Records Were Beaten By

73 broken records

Margins by which the 73 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 33.0. Ties are not counted.

Top 20 by Significance

31 August 1921

Top 20 records on 31 August 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1921	Barcaldine Post Office, AU	daily rain	33.5 mm (1.3 in)	33.0 mm (1.3 in)	31 years	52 of 100 (Notable)
31 August 1921	Aramac Post Office, AU	daily rain	31.8 mm (1.3 in)	31.0 mm (1.2 in)	20 years	44 of 100 (Notable)
31 August 1921	Rockhampton Post Office, AU	daily rain	40.6 mm (1.6 in)	29.9 mm (1.2 in)	20 years	43 of 100 (Notable)
31 August 1921	Springsure Comet St, AU	monthly rain	61.7 mm (2.4 in)	10.1 mm (0.4 in)	28 years	31 of 100 (Routine)
31 August 1921	Uccle, BE	daily low min	5.8 C (42.4 F)	0.5 C (0.9 F)	70 years	31 of 100 (Routine)
31 August 1921	Pacific Heights, AU	daily rain	55.9 mm (2.2 in)	30.5 mm (1.2 in)	11 years	28 of 100 (Routine)
31 August 1921	Tambo Post Office, AU	monthly rain	40.1 mm (1.6 in)	3.5 mm (0.14 in)	28 years	26 of 100 (Routine)
31 August 1921	Blackall Township, AU	monthly rain	56.4 mm (2.2 in)	9.7 mm (0.38 in)	6 years	26 of 100 (Routine)
31 August 1921	Alice Post Office, AU	monthly rain	43.2 mm (1.7 in)	9.4 mm (0.37 in)	4 years	25 of 100 (Routine)
31 August 1921	Arnsberg, DE	monthly low min	3.5 C (38.3 F)	0.3 C (0.5 F)	34 years	25 of 100 (Routine)
31 August 1921	Tashkent, UZ	monthly low max	22.5 C (72.5 F)	1.3 C (2.3 F)	26 years	25 of 100 (Routine)
31 August 1921	Alpha Post Office, AU	monthly rain	40.6 mm (1.6 in)	0.7 mm (0.03 in)	34 years	23 of 100 (Routine)
31 August 1921	Cet Central England, GB	monthly low min	3.8 C (38.8 F)	0.1 C (0.2 F)	31 years	23 of 100 (Routine)
31 August 1921	Cape May 2 NW, US	daily high max	34.4 C (93.9 F)	3.3 C (5.9 F)	20 years	22 of 100 (Routine)
31 August 1921	Emu Park Hill St, AU	daily rain	30.5 mm (1.2 in)	12.5 mm (0.5 in)	20 years	21 of 100 (Routine)
31 August 1921	Baltimore Customs House, US	daily high min	23.9 C (75.0 F)	1.1 C (2.0 F)	43 years	21 of 100 (Routine)
31 August 1921	Muttaburra, AU	daily rain	18.3 mm (0.7 in)	16.8 mm (0.7 in)	31 years	20 of 100 (Routine)
31 August 1921	Ulan-Ude, RU	daily rain	24.7 mm (1.0 in)	15.6 mm (0.6 in)	23 years	20 of 100 (Routine)
31 August 1921	Pentland Post Office, AU	daily rain	15.0 mm (0.6 in)	15.0 mm (0.6 in)	35 years	20 of 100 (Routine)
31 August 1921	Little Rock St Capitol, US	daily rain	24.1 mm (0.9 in)	15.0 mm (0.6 in)	32 years	20 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

1796 to 1921

Records set or tied on this calendar date in each year from 1796 to 1921. 1921 had 86 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 1921-08-31: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 5	53
5 to 10	10
10 to 15	2
15 to 20	4
20 to 25	0
25 to 30	1
30 to 35	3