Weather Records on 30 December 1917

217 weather records were set or tied worldwide on 30 December 1917. Highest significance: World Trade Ctr, US.

Key Facts for 30 December 1917

On 30 December 1917, 217 weather records were set or tied at long-record stations worldwide.
12 were record highs and 83 were record lows, counting maximum and minimum temperature.
By timescale, 16 were all-time records, 20 monthly and 181 daily.
World Trade Ctr set an all-time record low minimum temperature of -25.0 C (-13.0 F) on 30 December 1917.
Across 154 earlier years (1799 to 2025) the same calendar date averaged 498 records.

Record Map

217 stations

217 station records on 30 December 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 December 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
World Trade Ctr	United States	Record low minimum temperature	-25.0 C (-13.0 F)	43 of 100 (Notable)
Ferntree Gully	Australia	Record daily precipitation	46.5 mm (1.8 in)	42 of 100 (Notable)
Ny City Cntrl Park	United States	Record low minimum temperature	-25.0 C (-13.0 F)	42 of 100 (Notable)
Ny City Cntrl Park	United States	Record low maximum temperature	-16.7 C (1.9 F)	37 of 100 (Notable)
Beatrice	Canada	Record low minimum temperature	-40.0 C (-40.0 F)	34 of 100 (Routine)
Newry	Australia	Record daily precipitation	38.9 mm (1.5 in)	32 of 100 (Routine)
Blue Hill Coop	United States	Record low maximum temperature	-19.4 C (-2.9 F)	32 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	-16.1 C (3.0 F)	31 of 100 (Routine)
Setauket Strong	United States	Record low minimum temperature	-21.7 C (-7.1 F)	31 of 100 (Routine)
Blackwood	Australia	Record daily precipitation	30.0 mm (1.2 in)	30 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	-27.2 C (-17.0 F)	29 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	-18.9 C (-2.0 F)	29 of 100 (Routine)
Wilmington Wb City	United States	Record low minimum temperature	-14.4 C (6.1 F)	29 of 100 (Routine)
State College	United States	Record low minimum temperature	-25.0 C (-13.0 F)	29 of 100 (Routine)
Northfield	United States	Record low minimum temperature	-40.6 C (-41.1 F)	29 of 100 (Routine)
Portland Rfc City	United States	Record high maximum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Portland	United States	Record low minimum temperature	-29.4 C (-20.9 F)	28 of 100 (Routine)
Southampton	Canada	Record low minimum temperature	-27.2 C (-17.0 F)	26 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	-28.9 C (-20.0 F)	26 of 100 (Routine)
Greenville Dwtn AP	United States	Record low minimum temperature	-17.8 C (0.0 F)	25 of 100 (Routine)
Baltimore Customs House	United States	Record low maximum temperature	-12.2 C (10.0 F)	25 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Scotsburn (Mount Boninyong)	Australia	Record daily precipitation	25.4 mm (1.0 in)	24 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	-12.8 C (9.0 F)	24 of 100 (Routine)
Minnedosa	Canada	Record daily snowfall	5.1 cm (2.0 in)	21 of 100 (Routine)
Jacksonville Wb City	United States	Record low maximum temperature	0.6 C (33.1 F)	21 of 100 (Routine)
Clare (Hill River)	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Port Pirie (Valencia)	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Coondambo	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Wandearah North	Australia	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Georgetown	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Port Pirie Nyrstar Comparison	Australia	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Port Germein	Australia	Record daily precipitation	7.6 mm (0.30 in)	20 of 100 (Routine)
Narridy Post Office	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Yardea	Australia	Record daily precipitation	4.3 mm (0.17 in)	20 of 100 (Routine)
Caltowie	Australia	Record daily precipitation	5.6 mm (0.22 in)	20 of 100 (Routine)
Crystal Brook	Australia	Record daily precipitation	10.4 mm (0.4 in)	20 of 100 (Routine)
Gladstone	Australia	Record daily precipitation	7.6 mm (0.30 in)	20 of 100 (Routine)
Yacka	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Minnedosa	Canada	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Brinkworth (Bungaree)	Australia	Record daily precipitation	8.9 mm (0.35 in)	20 of 100 (Routine)
Meadows	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Woodburn	Australia	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Stawell	Australia	Record daily precipitation	7.4 mm (0.29 in)	20 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	7.9 mm (0.31 in)	20 of 100 (Routine)
Toronto	Canada	Record low minimum temperature	-23.9 C (-11.0 F)	20 of 100 (Routine)
Peterborough	Canada	Record low minimum temperature	-32.8 C (-27.0 F)	20 of 100 (Routine)
Northfield	United States	Record low maximum temperature	-24.4 C (-11.9 F)	20 of 100 (Routine)
Moonaree	Australia	Record daily precipitation	2.0 mm (0.08 in)	19 of 100 (Routine)
Hammond	Australia	Record daily precipitation	6.1 mm (0.24 in)	19 of 100 (Routine)
Beales Reservoir	Australia	Record daily precipitation	10.7 mm (0.4 in)	19 of 100 (Routine)
Quebec	Canada	Record low maximum temperature	-27.2 C (-17.0 F)	19 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high minimum temperature	10.6 C (51.1 F)	19 of 100 (Routine)
Morgantown 1	United States	Record low minimum temperature	-25.0 C (-13.0 F)	19 of 100 (Routine)
Stockport	Australia	Record daily precipitation	7.1 mm (0.28 in)	18 of 100 (Routine)
Meningie	Australia	Record daily precipitation	6.1 mm (0.24 in)	18 of 100 (Routine)
Hastings Post Office	Australia	Record daily precipitation	7.6 mm (0.30 in)	18 of 100 (Routine)
Stonecliffe	Canada	Record low maximum temperature	-24.4 C (-11.9 F)	18 of 100 (Routine)
Lucknow	Canada	Record low minimum temperature	-30.6 C (-23.1 F)	18 of 100 (Routine)

Counts by Type and Timescale

217 records

Records set or tied on 30 December 1917 by type: Highest daily maximum 8, Lowest daily maximum 41, Highest daily minimum 4, Lowest daily minimum 42, Heaviest daily rainfall 120, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 30 December 1917 by type
Record type	Records
Highest daily maximum	8
Lowest daily maximum	41
Highest daily minimum	4
Lowest daily minimum	42
Heaviest daily rainfall	120
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 30 December 1917 by timescale: all-time 16, monthly 20, daily 181.

How Much Records Were Beaten By

188 broken records

Margins by which the 188 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

30 December 1917

Top 20 records on 30 December 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1917	World Trade Ctr, US	all-time low min	-25.0 C (-13.0 F)	3.9 C (7.0 F)	42 years	43 of 100 (Notable)
30 December 1917	Ferntree Gully, AU	daily rain	46.5 mm (1.8 in)	33.0 mm (1.3 in)	28 years	42 of 100 (Notable)
30 December 1917	Ny City Cntrl Park, US	all-time low min	-25.0 C (-13.0 F)	3.9 C (7.0 F)	36 years	42 of 100 (Notable)
30 December 1917	Ny City Cntrl Park, US	all-time low max	-16.7 C (1.9 F)	1.1 C (2.0 F)	36 years	37 of 100 (Notable)
30 December 1917	Beatrice, CA	all-time low min	-40.0 C (-40.0 F)	0.6 C (1.1 F)	35 years	34 of 100 (Routine)
30 December 1917	Newry, AU	daily rain	38.9 mm (1.5 in)	21.1 mm (0.8 in)	23 years	32 of 100 (Routine)
30 December 1917	Blue Hill Coop, US	all-time low max	-19.4 C (-2.9 F)	1.1 C (2.0 F)	29 years	32 of 100 (Routine)
30 December 1917	Setauket Strong, US	all-time low max	-16.1 C (3.0 F)	1.7 C (3.1 F)	18 years	31 of 100 (Routine)
30 December 1917	Setauket Strong, US	all-time low min	-21.7 C (-7.1 F)	1.1 C (2.0 F)	21 years	31 of 100 (Routine)
30 December 1917	Blackwood, AU	daily rain	30.0 mm (1.2 in)	18.3 mm (0.7 in)	24 years	30 of 100 (Routine)
30 December 1917	Blue Hill Coop, US	all-time low min	-27.2 C (-17.0 F)	0.5 C (0.9 F)	21 years	29 of 100 (Routine)
30 December 1917	Cape May 2 NW, US	monthly low min	-18.9 C (-2.0 F)	2.2 C (4.0 F)	36 years	29 of 100 (Routine)
30 December 1917	Wilmington Wb City, US	monthly low min	-14.4 C (6.1 F)	2.2 C (4.0 F)	36 years	29 of 100 (Routine)
30 December 1917	State College, US	monthly low min	-25.0 C (-13.0 F)	4.4 C (7.9 F)	33 years	29 of 100 (Routine)
30 December 1917	Northfield, US	all-time low min	-40.6 C (-41.1 F)	3.4 C (6.1 F)	9 years	29 of 100 (Routine)
30 December 1917	Portland Rfc City, US	daily high max	16.1 C (61.0 F)	5.0 C (9.0 F)	40 years	29 of 100 (Routine)
30 December 1917	Portland, US	all-time low min	-29.4 C (-20.9 F)	2.2 C (4.0 F)	3 years	28 of 100 (Routine)
30 December 1917	Southampton, CA	monthly low min	-27.2 C (-17.0 F)	2.2 C (4.0 F)	33 years	26 of 100 (Routine)
30 December 1917	Middletown 4 W, US	all-time low min	-28.9 C (-20.0 F)	0.6 C (1.1 F)	5 years	26 of 100 (Routine)
30 December 1917	Greenville Dwtn AP, US	monthly low min	-17.8 C (0.0 F)	3.9 C (7.0 F)	16 years	25 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

1799 to 1917

Records set or tied on this calendar date in each year from 1799 to 1917. 1917 had 217 records.

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

Records on 12-30 in each year
Year	Records
1799	2
1835	1
1850	1
1853	1
1856	1
1859	1
1863	1
1868	1
1870	4
1872	3
1874	2
1875	2
1876	3
1878	1
1880	5
1881	3
1882	3
1884	2
1888	2
1889	2
1890	7
1891	1
1892	1
1893	3
1895	6
1896	3
1897	7
1898	6
1899	3
1900	5
1901	8
1902	2
1903	8
1904	12
1905	10
1906	11
1907	26
1908	17
1909	13
1910	18
1911	20
1912	37
1913	32
1914	47
1915	62
1916	45
1917	217
1918	25
1919	82
1920	84
1921	111
1922	227
1923	223
1924	65
1925	184
1926	63
1927	290
1928	31
1929	382
1930	71
1931	509
1932	407
1933	279
1934	206
1935	202
1936	931
1937	234
1938	208
1939	237
1940	397
1941	149
1942	584
1943	165
1944	137
1945	251
1946	584
1947	317
1948	760
1949	206
1950	479
1951	955
1952	334
1953	399
1954	538
1955	254
1956	556
1957	443
1958	525
1959	216
1960	345
1961	389
1962	671
1963	567
1964	537
1965	1,122
1966	403
1967	760
1968	1,391
1969	817
1970	571
1971	1,122
1972	1,052
1973	1,262
1974	564
1975	703
1976	981
1977	795
1978	1,930
1979	427
1980	1,560
1981	684
1982	630
1983	2,765
1984	1,834
1985	568
1986	852
1987	1,270
1988	755
1989	528
1990	3,065
1991	525
1992	1,210
1993	865
1994	642
1995	1,455
1996	1,620
1997	1,384
1998	801
1999	838
2000	1,377
2001	651
2002	1,034
2003	661
2004	974
2005	928
2006	1,779
2007	748
2008	653
2009	933
2010	1,200
2011	782
2012	676
2013	642
2014	660
2015	820
2016	706
2017	1,324
2018	284
2019	1,131
2020	604
2021	1,455
2022	909
2023	726
2024	638
2025	325

Download the Data

Data for records on 1917-12-30: 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	148
5 to 10	28
10 to 15	6
15 to 20	3
20 to 25	1
25 to 30	1
30 to 35	1