Weather Records on 21 October 1917

208 weather records were set or tied worldwide on 21 October 1917. Highest significance: Chiltern (Post Office), AU.

Key Facts for 21 October 1917

On 21 October 1917, 208 weather records were set or tied at long-record stations worldwide.
3 were record highs and 9 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 200 daily.
Chiltern (Post Office) set a daily record precipitation of 46.0 mm (1.8 in) on 21 October 1917.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 421 records.

Record Map

208 stations

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

Weather records on 21 October 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chiltern (Post Office)	Australia	Record daily precipitation	46.0 mm (1.8 in)	51 of 100 (Notable)
Lake Rowan (Bungeet)	Australia	Record daily precipitation	33.0 mm (1.3 in)	50 of 100 (Notable)
Howlong Post Office	Australia	Record daily precipitation	44.5 mm (1.8 in)	49 of 100 (Notable)
Violet Town	Australia	Record daily precipitation	43.2 mm (1.7 in)	48 of 100 (Notable)
Kyamba	Australia	Record daily precipitation	45.7 mm (1.8 in)	47 of 100 (Notable)
Tarcutta	Australia	Record daily precipitation	45.5 mm (1.8 in)	47 of 100 (Notable)
Tumut (Red Hill Station)	Australia	Record daily precipitation	58.7 mm (2.3 in)	47 of 100 (Notable)
Numurkah Post Office	Australia	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Boxwood	Australia	Record daily precipitation	34.0 mm (1.3 in)	47 of 100 (Notable)
Adelong Post Office	Australia	Record daily precipitation	44.7 mm (1.8 in)	44 of 100 (Notable)
Deniliquin (Wilkinson St)	Australia	Record daily precipitation	38.9 mm (1.5 in)	44 of 100 (Notable)
Winbar	Australia	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)
Rushworth	Australia	Record daily precipitation	25.9 mm (1.0 in)	43 of 100 (Notable)
Woods Point	Australia	Record daily precipitation	56.1 mm (2.2 in)	43 of 100 (Notable)
Albury	Australia	Record daily precipitation	40.1 mm (1.6 in)	41 of 100 (Notable)
Jamieson	Australia	Record daily precipitation	47.0 mm (1.9 in)	41 of 100 (Notable)
Steam Plains 1	Australia	Record daily precipitation	27.4 mm (1.1 in)	40 of 100 (Notable)
Yielima Post Office	Australia	Record daily precipitation	35.3 mm (1.4 in)	40 of 100 (Notable)
Boomanoomana	Australia	Record daily precipitation	34.3 mm (1.4 in)	39 of 100 (Notable)
Wanganella (Zara)	Australia	Record daily precipitation	31.5 mm (1.2 in)	39 of 100 (Notable)
Round Hill	Australia	Record daily precipitation	54.6 mm (2.1 in)	38 of 100 (Notable)
Moolpa	Australia	Record daily precipitation	27.2 mm (1.1 in)	38 of 100 (Notable)
Barmah East	Australia	Record daily precipitation	33.5 mm (1.3 in)	38 of 100 (Notable)
Beechworth Composite	Australia	Record daily precipitation	75.2 mm (3.0 in)	38 of 100 (Notable)
Walwa	Australia	Record daily precipitation	62.2 mm (2.4 in)	38 of 100 (Notable)
Kyabram Post Office	Australia	Record daily precipitation	29.5 mm (1.2 in)	37 of 100 (Notable)
Wangaratta	Australia	Record daily precipitation	45.2 mm (1.8 in)	37 of 100 (Notable)
Rutherglen Netherby Wine	Australia	Record daily precipitation	42.4 mm (1.7 in)	36 of 100 (Notable)
Yellowin	Australia	Record daily precipitation	50.3 mm (2.0 in)	35 of 100 (Notable)
Kaarimba	Australia	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Moama	Australia	Record daily precipitation	30.2 mm (1.2 in)	34 of 100 (Routine)
Madowla Park	Australia	Record daily precipitation	32.0 mm (1.3 in)	34 of 100 (Routine)
Kergunyah South	Australia	Record daily precipitation	52.8 mm (2.1 in)	34 of 100 (Routine)
Mallan (Niemur Valley)	Australia	Record daily precipitation	26.7 mm (1.1 in)	33 of 100 (Routine)
Wargam	Australia	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Tumut (Wattle Cres)	Australia	Record daily precipitation	40.4 mm (1.6 in)	32 of 100 (Routine)
Tatura Post Office	Australia	Record daily precipitation	29.5 mm (1.2 in)	32 of 100 (Routine)
Dunlop	Australia	Record daily precipitation	30.5 mm (1.2 in)	31 of 100 (Routine)
Batlow Post Office	Australia	Record daily precipitation	63.5 mm (2.5 in)	31 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record daily precipitation	36.8 mm (1.4 in)	31 of 100 (Routine)
Coronga Downs	Australia	Record daily precipitation	30.7 mm (1.2 in)	30 of 100 (Routine)
Nymagee (Pyramid)	Australia	Record daily precipitation	29.7 mm (1.2 in)	30 of 100 (Routine)
Talmalmo	Australia	Record daily precipitation	54.4 mm (2.1 in)	30 of 100 (Routine)
Mundarlo (Yabtree)	Australia	Record daily precipitation	34.3 mm (1.4 in)	30 of 100 (Routine)
Gobarralong	Australia	Record daily precipitation	32.5 mm (1.3 in)	28 of 100 (Routine)
Mulwala Homestead	Australia	Record daily precipitation	30.0 mm (1.2 in)	28 of 100 (Routine)
Urana Post Office	Australia	Record daily precipitation	27.4 mm (1.1 in)	28 of 100 (Routine)
Outtrim	Australia	Record daily precipitation	32.0 mm (1.3 in)	28 of 100 (Routine)
Grong Grong (Berembed)	Australia	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Goulburn River @ Shepparton	Australia	Record daily precipitation	35.1 mm (1.4 in)	27 of 100 (Routine)
Jerilderie (Yanko Station)	Australia	Record daily precipitation	26.2 mm (1.0 in)	26 of 100 (Routine)
Mathoura (Mathoura Station)	Australia	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Puckawidgee Back	Australia	Record daily precipitation	29.2 mm (1.1 in)	26 of 100 (Routine)
Echuca Aerodrome	Australia	Record daily precipitation	28.7 mm (1.1 in)	26 of 100 (Routine)
Yanco (Billinbah East)	Australia	Record daily precipitation	26.9 mm (1.1 in)	25 of 100 (Routine)
Colinroobie	Australia	Record daily precipitation	28.4 mm (1.1 in)	25 of 100 (Routine)
Bright Post Office	Australia	Record daily precipitation	73.9 mm (2.9 in)	25 of 100 (Routine)
Nariel Creek (Simpson)	Australia	Record daily precipitation	46.5 mm (1.8 in)	24 of 100 (Routine)
Sandy Creek Tank	Australia	Record daily precipitation	29.2 mm (1.1 in)	23 of 100 (Routine)
Tumbarumba 1	Australia	Record daily precipitation	63.5 mm (2.5 in)	23 of 100 (Routine)

Counts by Type and Timescale

208 records

Records set or tied on 21 October 1917 by type: Highest daily maximum 3, Lowest daily maximum 3, Lowest daily minimum 6, Heaviest daily rainfall 190, Heaviest daily snowfall 6.

Records on 21 October 1917 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	3
Highest daily minimum	0
Lowest daily minimum	6
Heaviest daily rainfall	190
Heaviest daily snowfall	6
Deepest snow cover	0

Records on 21 October 1917 by timescale: all-time 0, monthly 8, daily 200.

How Much Records Were Beaten By

197 broken records

Margins by which the 197 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 64.0. Ties are not counted.

Top 20 by Significance

21 October 1917

Top 20 records on 21 October 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1917	Chiltern (Post Office), AU	daily rain	46.0 mm (1.8 in)	33.8 mm (1.3 in)	26 years	51 of 100 (Notable)
21 October 1917	Lake Rowan (Bungeet), AU	daily rain	33.0 mm (1.3 in)	28.4 mm (1.1 in)	23 years	50 of 100 (Notable)
21 October 1917	Howlong Post Office, AU	daily rain	44.5 mm (1.8 in)	30.0 mm (1.2 in)	32 years	49 of 100 (Notable)
21 October 1917	Violet Town, AU	daily rain	43.2 mm (1.7 in)	31.3 mm (1.2 in)	33 years	48 of 100 (Notable)
21 October 1917	Kyamba, AU	daily rain	45.7 mm (1.8 in)	37.1 mm (1.5 in)	16 years	47 of 100 (Notable)
21 October 1917	Tarcutta, AU	daily rain	45.5 mm (1.8 in)	26.4 mm (1.0 in)	42 years	47 of 100 (Notable)
21 October 1917	Tumut (Red Hill Station), AU	daily rain	58.7 mm (2.3 in)	47.3 mm (1.9 in)	16 years	47 of 100 (Notable)
21 October 1917	Numurkah Post Office, AU	daily rain	41.4 mm (1.6 in)	30.7 mm (1.2 in)	16 years	47 of 100 (Notable)
21 October 1917	Boxwood, AU	daily rain	34.0 mm (1.3 in)	26.6 mm (1.0 in)	32 years	47 of 100 (Notable)
21 October 1917	Adelong Post Office, AU	daily rain	44.7 mm (1.8 in)	29.0 mm (1.1 in)	33 years	44 of 100 (Notable)
21 October 1917	Deniliquin (Wilkinson St), AU	daily rain	38.9 mm (1.5 in)	23.9 mm (0.9 in)	26 years	44 of 100 (Notable)
21 October 1917	Winbar, AU	daily rain	34.3 mm (1.4 in)	31.8 mm (1.3 in)	16 years	43 of 100 (Notable)
21 October 1917	Rushworth, AU	daily rain	25.9 mm (1.0 in)	25.9 mm (1.0 in)	29 years	43 of 100 (Notable)
21 October 1917	Woods Point, AU	daily rain	56.1 mm (2.2 in)	34.5 mm (1.4 in)	32 years	43 of 100 (Notable)
21 October 1917	Albury, AU	daily rain	40.1 mm (1.6 in)	27.4 mm (1.1 in)	32 years	41 of 100 (Notable)
21 October 1917	Jamieson, AU	daily rain	47.0 mm (1.9 in)	28.7 mm (1.1 in)	32 years	41 of 100 (Notable)
21 October 1917	Steam Plains 1, AU	daily rain	27.4 mm (1.1 in)	16.7 mm (0.7 in)	32 years	40 of 100 (Notable)
21 October 1917	Yielima Post Office, AU	daily rain	35.3 mm (1.4 in)	22.6 mm (0.9 in)	26 years	40 of 100 (Notable)
21 October 1917	Boomanoomana, AU	daily rain	34.3 mm (1.4 in)	18.8 mm (0.7 in)	33 years	39 of 100 (Notable)
21 October 1917	Wanganella (Zara), AU	daily rain	31.5 mm (1.2 in)	18.8 mm (0.7 in)	33 years	39 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

1795 to 1917

Records set or tied on this calendar date in each year from 1795 to 1917. 1917 had 208 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1917-10-21: 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 10	117
10 to 20	50
20 to 30	18
30 to 40	9
40 to 50	1
50 to 60	1
60 to 70	1