Weather Records on 21 November 1917

248 weather records were set or tied worldwide on 21 November 1917. Highest significance: Blackall Township, AU.

Key Facts for 21 November 1917

On 21 November 1917, 248 weather records were set or tied at long-record stations worldwide.
34 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 15 monthly and 233 daily.
Blackall Township set a monthly record daily precipitation of 109.7 mm (4.3 in) on 21 November 1917.
Across 159 earlier years (1803 to 2025) the same calendar date averaged 451 records.

Record Map

248 stations

248 station records on 21 November 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 November 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Blackall Township	Australia	Record daily precipitation	109.7 mm (4.3 in)	61 of 100 (Major)
Karumba Pilot Station	Australia	Record daily precipitation	133.4 mm (5.3 in)	52 of 100 (Notable)
Ooma	Australia	Record daily precipitation	47.0 mm (1.9 in)	49 of 100 (Notable)
Moolpa	Australia	Record daily precipitation	31.2 mm (1.2 in)	46 of 100 (Notable)
Adelaide (Tea Tree Gully Counc	Australia	Record daily precipitation	34.3 mm (1.4 in)	45 of 100 (Notable)
Mallan (Niemur Valley)	Australia	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Clare (Hill River)	Australia	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Clermont Sirius St	Australia	Record daily precipitation	49.8 mm (2.0 in)	42 of 100 (Notable)
Boola Boolka	Australia	Record daily precipitation	39.1 mm (1.5 in)	40 of 100 (Notable)
Neba Coonamble	Australia	Record daily precipitation	52.1 mm (2.1 in)	38 of 100 (Notable)
Morven Post Office	Australia	Record daily precipitation	49.5 mm (1.9 in)	37 of 100 (Notable)
Dandaloo (Tyrie Homestead)	Australia	Record daily precipitation	45.7 mm (1.8 in)	37 of 100 (Notable)
Sedan (Sandleton)	Australia	Record daily precipitation	29.2 mm (1.1 in)	36 of 100 (Notable)
Pooncarie (Moorara)	Australia	Record daily precipitation	30.5 mm (1.2 in)	36 of 100 (Notable)
Euston Post Office	Australia	Record daily precipitation	31.5 mm (1.2 in)	35 of 100 (Notable)
Oxford	United Kingdom	Record high minimum temperature	11.3 C (52.3 F)	34 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high maximum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Cultowa	Australia	Record daily precipitation	47.8 mm (1.9 in)	33 of 100 (Routine)
Warren (Haddon Rig)	Australia	Record daily precipitation	46.2 mm (1.8 in)	33 of 100 (Routine)
Nelgowrie	Australia	Record daily precipitation	59.7 mm (2.4 in)	31 of 100 (Routine)
Mandamar	Australia	Record daily precipitation	39.4 mm (1.6 in)	31 of 100 (Routine)
Coonamble (Nardoo)	Australia	Record daily precipitation	37.6 mm (1.5 in)	30 of 100 (Routine)
Watervale	Australia	Record daily precipitation	29.2 mm (1.1 in)	29 of 100 (Routine)
Alpha Post Office	Australia	Record daily precipitation	79.2 mm (3.1 in)	28 of 100 (Routine)
Pooncarie Mail Agency	Australia	Record daily precipitation	50.0 mm (2.0 in)	28 of 100 (Routine)
Dumble	Australia	Record daily precipitation	49.3 mm (1.9 in)	27 of 100 (Routine)
Bindara (Netley)	Australia	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
New Westminster	Canada	Record high maximum temperature	14.4 C (57.9 F)	26 of 100 (Routine)
Sedan	Australia	Record daily precipitation	42.7 mm (1.7 in)	25 of 100 (Routine)
Aramac Post Office	Australia	Record daily precipitation	95.8 mm (3.8 in)	25 of 100 (Routine)
Tambo Post Office	Australia	Record daily precipitation	30.2 mm (1.2 in)	24 of 100 (Routine)
Pooncarie (Tarcoola)	Australia	Record daily precipitation	44.5 mm (1.8 in)	24 of 100 (Routine)
Weilmoringle	Australia	Record daily precipitation	51.8 mm (2.0 in)	24 of 100 (Routine)
Menindee Post Office	Australia	Record daily precipitation	27.4 mm (1.1 in)	23 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record low maximum temperature	17.8 C (64.0 F)	23 of 100 (Routine)
Astoria	United States	Record high maximum temperature	19.4 C (66.9 F)	23 of 100 (Routine)
Arumpo	Australia	Record daily precipitation	43.7 mm (1.7 in)	22 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high minimum temperature	11.7 C (53.1 F)	22 of 100 (Routine)
Hoyleton	Australia	Record daily precipitation	44.7 mm (1.8 in)	21 of 100 (Routine)
Muttaburra	Australia	Record daily precipitation	30.7 mm (1.2 in)	21 of 100 (Routine)
Broken Hill (Glen Lyon)	Australia	Record daily precipitation	49.5 mm (1.9 in)	21 of 100 (Routine)
Yardea	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Hohenpeissenberg	Germany	Record daily precipitation	22.8 mm (0.9 in)	20 of 100 (Routine)
Gorki	Belarus	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Blyth	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Adelaide (Pooraka)	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Yudnapinna	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Whittata	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Brinkworth (Anama Park)	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Angaston	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Truro	Australia	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Innamincka Police Camp	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Mount Wedge	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Clare Post Office	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Bute (Ninnes)	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Tarlee	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Eudunda	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Wanaaring (Urisino)	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Adelaide (Salisbury Bowling Cl	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Nuriootpa	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

248 records

Records set or tied on 21 November 1917 by type: Highest daily maximum 14, Lowest daily maximum 5, Highest daily minimum 20, Heaviest daily rainfall 208, Heaviest daily snowfall 1.

Records on 21 November 1917 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	5
Highest daily minimum	20
Lowest daily minimum	0
Heaviest daily rainfall	208
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 November 1917 by timescale: all-time 0, monthly 15, daily 233.

How Much Records Were Beaten By

240 broken records

Margins by which the 240 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 107.2. Ties are not counted.

Top 20 by Significance

21 November 1917

Top 20 records on 21 November 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 November 1917	Blackall Township, AU	monthly rain	109.7 mm (4.3 in)	50.8 mm (2.0 in)	29 years	61 of 100 (Major)
21 November 1917	Karumba Pilot Station, AU	daily rain	133.4 mm (5.3 in)	107.2 mm (4.2 in)	27 years	52 of 100 (Notable)
21 November 1917	Ooma, AU	daily rain	47.0 mm (1.9 in)	36.8 mm (1.4 in)	24 years	49 of 100 (Notable)
21 November 1917	Moolpa, AU	daily rain	31.2 mm (1.2 in)	29.7 mm (1.2 in)	24 years	46 of 100 (Notable)
21 November 1917	Adelaide (Tea Tree Gully Counc, AU	daily rain	34.3 mm (1.4 in)	29.2 mm (1.1 in)	8 years	45 of 100 (Notable)
21 November 1917	Mallan (Niemur Valley), AU	daily rain	31.0 mm (1.2 in)	28.0 mm (1.1 in)	24 years	44 of 100 (Notable)
21 November 1917	Clare (Hill River), AU	daily rain	33.0 mm (1.3 in)	26.9 mm (1.1 in)	11 years	42 of 100 (Notable)
21 November 1917	Clermont Sirius St, AU	daily rain	49.8 mm (2.0 in)	39.4 mm (1.6 in)	25 years	42 of 100 (Notable)
21 November 1917	Boola Boolka, AU	daily rain	39.1 mm (1.5 in)	31.0 mm (1.2 in)	0 years	40 of 100 (Notable)
21 November 1917	Neba Coonamble, AU	daily rain	52.1 mm (2.1 in)	31.8 mm (1.3 in)	12 years	38 of 100 (Notable)
21 November 1917	Morven Post Office, AU	daily rain	49.5 mm (1.9 in)	44.4 mm (1.7 in)	6 years	37 of 100 (Notable)
21 November 1917	Dandaloo (Tyrie Homestead), AU	daily rain	45.7 mm (1.8 in)	34.3 mm (1.4 in)	8 years	37 of 100 (Notable)
21 November 1917	Sedan (Sandleton), AU	daily rain	29.2 mm (1.1 in)	24.1 mm (0.9 in)	8 years	36 of 100 (Notable)
21 November 1917	Pooncarie (Moorara), AU	daily rain	30.5 mm (1.2 in)	28.0 mm (1.1 in)	0 years	36 of 100 (Notable)
21 November 1917	Euston Post Office, AU	daily rain	31.5 mm (1.2 in)	20.1 mm (0.8 in)	34 years	35 of 100 (Notable)
21 November 1917	Oxford, GB	daily high min	11.3 C (52.3 F)	1.1 C (2.0 F)	73 years	34 of 100 (Routine)
21 November 1917	Olympia Priest Pt Park, US	daily high max	20.6 C (69.1 F)	6.2 C (11.2 F)	38 years	34 of 100 (Routine)
21 November 1917	Cultowa, AU	monthly rain	47.8 mm (1.9 in)	12.2 mm (0.5 in)	21 years	33 of 100 (Routine)
21 November 1917	Warren (Haddon Rig), AU	daily rain	46.2 mm (1.8 in)	23.3 mm (0.9 in)	34 years	33 of 100 (Routine)
21 November 1917	Nelgowrie, AU	daily rain	59.7 mm (2.4 in)	33.0 mm (1.3 in)	0 years	31 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

1803 to 1917

Records set or tied on this calendar date in each year from 1803 to 1917. 1917 had 248 records.

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

Records on 11-21 in each year
Year	Records
1803	1
1816	2
1821	2
1829	1
1835	1
1839	1
1844	1
1847	1
1855	1
1856	1
1857	1
1858	4
1866	1
1868	1
1870	2
1871	2
1872	1
1873	2
1874	1
1876	2
1879	4
1880	4
1881	1
1882	1
1883	3
1887	3
1889	1
1890	7
1893	1
1894	4
1896	1
1897	4
1898	3
1899	4
1900	7
1901	5
1902	7
1903	5
1904	9
1905	3
1906	14
1907	7
1908	9
1909	18
1910	23
1911	19
1912	14
1913	79
1914	51
1915	21
1916	66
1917	248
1918	12
1919	22
1920	36
1921	96
1922	42
1923	27
1924	104
1925	73
1926	420
1927	108
1928	109
1929	467
1930	243
1931	682
1932	162
1933	381
1934	578
1935	62
1936	192
1937	1,309
1938	119
1939	303
1940	337
1941	329
1942	662
1943	212
1944	250
1945	308
1946	604
1947	540
1948	414
1949	588
1950	904
1951	605
1952	424
1953	408
1954	927
1955	419
1956	624
1957	442
1958	407
1959	460
1960	691
1961	738
1962	524
1963	601
1964	1,014
1965	448
1966	589
1967	336
1968	358
1969	611
1970	400
1971	514
1972	735
1973	1,100
1974	809
1975	548
1976	315
1977	1,313
1978	1,034
1979	1,409
1980	805
1981	939
1982	807
1983	1,066
1984	525
1985	1,808
1986	815
1987	949
1988	928
1989	797
1990	1,337
1991	944
1992	1,375
1993	1,413
1994	1,179
1995	1,084
1996	1,882
1997	449
1998	1,312
1999	920
2000	1,191
2001	811
2002	847
2003	1,007
2004	873
2005	491
2006	1,181
2007	936
2008	1,079
2009	1,131
2010	894
2011	944
2012	792
2013	543
2014	815
2015	785
2016	1,000
2017	687
2018	391
2019	653
2020	421
2021	296
2022	824
2023	584
2024	519
2025	745

Download the Data

Data for records on 1917-11-21: 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	217
20 to 40	20
40 to 60	2
60 to 80	0
80 to 100	0
100 to 120	1