Weather Records on 31 December 1917

239 weather records were set or tied worldwide on 31 December 1917. Highest significance: Kew, AU.

Key Facts for 31 December 1917

On 31 December 1917, 239 weather records were set or tied at long-record stations worldwide.
11 were record highs and 61 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 8 monthly and 229 daily.
Kew set a daily record precipitation of 56.1 mm (2.2 in) on 31 December 1917.
Across 157 earlier years (1797 to 2025) the same calendar date averaged 488 records.

Record Map

239 stations

239 station records on 31 December 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 December 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kew	Australia	Record daily precipitation	56.1 mm (2.2 in)	54 of 100 (Notable)
Narre Warren North (Narre Warr	Australia	Record daily precipitation	57.7 mm (2.3 in)	50 of 100 (Notable)
Bacchus Marsh	Australia	Record daily precipitation	42.4 mm (1.7 in)	48 of 100 (Notable)
Beenak	Australia	Record daily precipitation	59.4 mm (2.3 in)	47 of 100 (Notable)
Lilydale	Australia	Record daily precipitation	41.7 mm (1.6 in)	46 of 100 (Notable)
Ballan	Australia	Record daily precipitation	37.8 mm (1.5 in)	43 of 100 (Notable)
Whitehead	Canada	Record daily snowfall	45.7 cm (18.0 in)	43 of 100 (Notable)
Beales Reservoir	Australia	Record daily precipitation	39.6 mm (1.6 in)	41 of 100 (Notable)
Rosedale	Australia	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
Murrumbeena Leeds Grove	Australia	Record daily precipitation	49.8 mm (2.0 in)	40 of 100 (Notable)
Wandin (Yallock)	Australia	Record daily precipitation	38.1 mm (1.5 in)	39 of 100 (Notable)
Port Albert	Australia	Record daily precipitation	34.5 mm (1.4 in)	38 of 100 (Notable)
Sydney	Canada	Record daily snowfall	38.1 cm (15.0 in)	37 of 100 (Notable)
Chattanooga Wb City	United States	Record daily snowfall	15.2 cm (6.0 in)	36 of 100 (Notable)
Yan Yean	Australia	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Warburton	Australia	Record daily precipitation	51.1 mm (2.0 in)	34 of 100 (Routine)
Sale Mercury Office	Australia	Record daily precipitation	35.3 mm (1.4 in)	33 of 100 (Routine)
Sale	Australia	Record daily precipitation	34.3 mm (1.4 in)	32 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Little River (Mount Rothwell)	Australia	Record daily precipitation	40.1 mm (1.6 in)	31 of 100 (Routine)
Yarram	Australia	Record daily precipitation	32.8 mm (1.3 in)	30 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	52.8 mm (2.1 in)	30 of 100 (Routine)
Middletown 4 W	United States	Record low maximum temperature	-19.4 C (-2.9 F)	30 of 100 (Routine)
Sunbury (Salesian College )	Australia	Record daily precipitation	71.6 mm (2.8 in)	29 of 100 (Routine)
Coranderrk Badger Weir	Australia	Record daily precipitation	43.2 mm (1.7 in)	28 of 100 (Routine)
Fryerstown	Australia	Record daily precipitation	35.8 mm (1.4 in)	27 of 100 (Routine)
Sable Island East End	Canada	Record daily snowfall	5.1 cm (2.0 in)	27 of 100 (Routine)
Melton	Australia	Record daily precipitation	29.7 mm (1.2 in)	25 of 100 (Routine)
Wilmington Wb City	United States	Record low maximum temperature	-7.8 C (18.0 F)	25 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high maximum temperature	15.6 C (60.1 F)	25 of 100 (Routine)
Officer (Jesmond Dene)	Australia	Record daily precipitation	35.1 mm (1.4 in)	24 of 100 (Routine)
Newlyn Reservoir	Australia	Record daily precipitation	31.5 mm (1.2 in)	24 of 100 (Routine)
New Westminster	Canada	Record high maximum temperature	12.2 C (54.0 F)	24 of 100 (Routine)
Concord	United States	Record low maximum temperature	-15.0 C (5.0 F)	24 of 100 (Routine)
Newark Liberty Intl AP	United States	Record low minimum temperature	-22.8 C (-9.0 F)	24 of 100 (Routine)
Anticosti SW Point	Canada	Record low maximum temperature	-16.7 C (1.9 F)	23 of 100 (Routine)
Portland	United States	Record low minimum temperature	-26.1 C (-15.0 F)	23 of 100 (Routine)
Setauket Strong	United States	Record low minimum temperature	-19.4 C (-2.9 F)	23 of 100 (Routine)
Burlington	United States	Record low maximum temperature	-22.2 C (-8.0 F)	23 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high minimum temperature	10.0 C (50.0 F)	23 of 100 (Routine)
Maffra Shire Hall	Australia	Record daily precipitation	31.8 mm (1.3 in)	22 of 100 (Routine)
Stradbroke Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	22 of 100 (Routine)
Kinglake West (Wallaby Creek)	Australia	Record daily precipitation	30.0 mm (1.2 in)	22 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	-19.4 C (-2.9 F)	22 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	-27.2 C (-17.0 F)	22 of 100 (Routine)
World Trade Ctr	United States	Record low maximum temperature	-14.4 C (6.1 F)	22 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	-13.3 C (8.1 F)	22 of 100 (Routine)
Lancefield	Australia	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	-18.3 C (-0.9 F)	21 of 100 (Routine)
Brinkworth (Bungaree)	Australia	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Wirrabara	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Portland	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Victoria Valley	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Dunkeld	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Gawler Council Depot	Australia	Record daily precipitation	3.6 mm (0.14 in)	20 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Mornington	Australia	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Berrybank	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Rokewood (Kuruc A Ruc)	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Dimboola	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)

Counts by Type and Timescale

239 records

Records set or tied on 31 December 1917 by type: Highest daily maximum 7, Lowest daily maximum 36, Highest daily minimum 4, Lowest daily minimum 25, Heaviest daily rainfall 161, Heaviest daily snowfall 6.

Records on 31 December 1917 by type
Record type	Records
Highest daily maximum	7
Lowest daily maximum	36
Highest daily minimum	4
Lowest daily minimum	25
Heaviest daily rainfall	161
Heaviest daily snowfall	6
Deepest snow cover	0

Records on 31 December 1917 by timescale: all-time 2, monthly 8, daily 229.

How Much Records Were Beaten By

223 broken records

Margins by which the 223 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 165.0. Ties are not counted.

Top 20 by Significance

31 December 1917

Top 20 records on 31 December 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 December 1917	Kew, AU	daily rain	56.1 mm (2.2 in)	50.5 mm (2.0 in)	34 years	54 of 100 (Notable)
31 December 1917	Narre Warren North (Narre Warr, AU	daily rain	57.7 mm (2.3 in)	43.5 mm (1.7 in)	19 years	50 of 100 (Notable)
31 December 1917	Bacchus Marsh, AU	daily rain	42.4 mm (1.7 in)	32.5 mm (1.3 in)	28 years	48 of 100 (Notable)
31 December 1917	Beenak, AU	daily rain	59.4 mm (2.3 in)	42.9 mm (1.7 in)	34 years	47 of 100 (Notable)
31 December 1917	Lilydale, AU	daily rain	41.7 mm (1.6 in)	36.1 mm (1.4 in)	16 years	46 of 100 (Notable)
31 December 1917	Ballan, AU	daily rain	37.8 mm (1.5 in)	25.1 mm (1.0 in)	28 years	43 of 100 (Notable)
31 December 1917	Whitehead, CA	monthly snowfall	45.7 cm (18.0 in)	16.5 cm (6.5 in)	16 years	43 of 100 (Notable)
31 December 1917	Beales Reservoir, AU	daily rain	39.6 mm (1.6 in)	28.9 mm (1.1 in)	16 years	41 of 100 (Notable)
31 December 1917	Rosedale, AU	daily rain	43.2 mm (1.7 in)	26.2 mm (1.0 in)	24 years	40 of 100 (Notable)
31 December 1917	Murrumbeena Leeds Grove, AU	daily rain	49.8 mm (2.0 in)	34.8 mm (1.4 in)	4 years	40 of 100 (Notable)
31 December 1917	Wandin (Yallock), AU	daily rain	38.1 mm (1.5 in)	31.7 mm (1.2 in)	28 years	39 of 100 (Notable)
31 December 1917	Port Albert, AU	daily rain	34.5 mm (1.4 in)	21.3 mm (0.8 in)	24 years	38 of 100 (Notable)
31 December 1917	Sydney, CA	daily snowfall	38.1 cm (15.0 in)	14.0 cm (5.5 in)	39 years	37 of 100 (Notable)
31 December 1917	Chattanooga Wb City, US	daily snowfall	15.2 cm (6.0 in)	14.4 cm (5.7 in)	22 years	36 of 100 (Notable)
31 December 1917	Yan Yean, AU	daily rain	35.6 mm (1.4 in)	23.9 mm (0.9 in)	4 years	35 of 100 (Notable)
31 December 1917	Warburton, AU	daily rain	51.1 mm (2.0 in)	26.5 mm (1.0 in)	34 years	34 of 100 (Routine)
31 December 1917	Sale Mercury Office, AU	daily rain	35.3 mm (1.4 in)	20.6 mm (0.8 in)	24 years	33 of 100 (Routine)
31 December 1917	Sale, AU	daily rain	34.3 mm (1.4 in)	20.8 mm (0.8 in)	24 years	32 of 100 (Routine)
31 December 1917	Portland Rfc City, US	daily high min	12.8 C (55.0 F)	5.6 C (10.1 F)	42 years	32 of 100 (Routine)
31 December 1917	Little River (Mount Rothwell), AU	daily rain	40.1 mm (1.6 in)	19.8 mm (0.8 in)	28 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

1797 to 1917

Records set or tied on this calendar date in each year from 1797 to 1917. 1917 had 239 records.

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

Records on 12-31 in each year
Year	Records
1797	1
1799	2
1826	1
1836	1
1842	2
1850	3
1853	1
1854	1
1859	1
1860	1
1867	1
1870	2
1872	2
1874	4
1875	2
1876	2
1878	2
1879	2
1880	2
1882	1
1884	2
1885	1
1886	3
1887	1
1888	2
1890	2
1891	8
1892	4
1895	4
1897	6
1898	5
1899	4
1900	3
1901	16
1902	3
1903	3
1904	11
1905	9
1906	31
1907	11
1908	7
1909	5
1910	25
1911	14
1912	17
1913	46
1914	34
1915	32
1916	25
1917	239
1918	24
1919	38
1920	64
1921	130
1922	83
1923	280
1924	113
1925	183
1926	77
1927	491
1928	53
1929	224
1930	58
1931	543
1932	394
1933	409
1934	181
1935	309
1936	567
1937	500
1938	247
1939	298
1940	467
1941	159
1942	352
1943	159
1944	259
1945	210
1946	707
1947	461
1948	591
1949	384
1950	310
1951	1,421
1952	377
1953	410
1954	286
1955	429
1956	216
1957	724
1958	584
1959	414
1960	389
1961	309
1962	810
1963	1,015
1964	388
1965	1,371
1966	326
1967	1,023
1968	1,371
1969	825
1970	579
1971	568
1972	836
1973	1,370
1974	590
1975	791
1976	1,306
1977	641
1978	2,791
1979	448
1980	1,448
1981	786
1982	639
1983	2,220
1984	942
1985	593
1986	616
1987	845
1988	600
1989	506
1990	1,379
1991	703
1992	1,062
1993	718
1994	878
1995	1,151
1996	2,202
1997	988
1998	739
1999	524
2000	1,575
2001	748
2002	1,232
2003	523
2004	1,278
2005	959
2006	2,089
2007	652
2008	656
2009	867
2010	1,544
2011	739
2012	803
2013	606
2014	903
2015	748
2016	678
2017	1,589
2018	620
2019	593
2020	489
2021	1,739
2022	1,497
2023	474
2024	460
2025	760

Download the Data

Data for records on 1917-12-31: 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 25	206
25 to 50	12
50 to 75	2
75 to 100	0
100 to 125	0
125 to 150	2
150 to 175	1