Weather Records on 15 December 1917

40 weather records were set or tied worldwide on 15 December 1917. Highest significance: Mackay Post Office, AU.

Key Facts for 15 December 1917

On 15 December 1917, 40 weather records were set or tied at long-record stations worldwide.
2 were record highs and 24 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 38 daily.
Mackay Post Office set a daily record precipitation of 119.4 mm (4.7 in) on 15 December 1917.
Across 168 earlier years (1793 to 2025) the same calendar date averaged 458 records.

Record Map

40 stations

40 station records on 15 December 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 December 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mackay Post Office	Australia	Record daily precipitation	119.4 mm (4.7 in)	40 of 100 (Notable)
Cairns Post Office	Australia	Record daily precipitation	84.3 mm (3.3 in)	37 of 100 (Notable)
Burdekin Shire Council	Australia	Record daily precipitation	48.8 mm (1.9 in)	31 of 100 (Routine)
Gorki	Belarus	Record daily precipitation	28.5 mm (1.1 in)	28 of 100 (Routine)
Bowen Post Office	Australia	Record daily precipitation	188.0 mm (7.4 in)	23 of 100 (Routine)
Morpeth Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	21 of 100 (Routine)
Brisbane Regional Office	Australia	Record low maximum temperature	25.4 C (77.7 F)	17 of 100 (Routine)
New Westminster	Canada	Record daily precipitation	32.8 mm (1.3 in)	16 of 100 (Routine)
Parry Sound	Canada	Record low maximum temperature	-15.6 C (3.9 F)	16 of 100 (Routine)
Lindsay	Canada	Record low minimum temperature	-25.6 C (-14.1 F)	15 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	-17.8 C (0.0 F)	14 of 100 (Routine)
Buffalo	United States	Record low maximum temperature	-10.0 C (14.0 F)	12 of 100 (Routine)
Wilmington Wb City	United States	Record low minimum temperature	-6.1 C (21.0 F)	12 of 100 (Routine)
Darwin Post Office	Australia	Record low maximum temperature	27.8 C (82.0 F)	10 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	-11.1 C (12.0 F)	10 of 100 (Routine)
Port Stanley	Canada	Record low maximum temperature	-10.0 C (14.0 F)	9 of 100 (Routine)
Welland	Canada	Record low minimum temperature	-19.4 C (-2.9 F)	9 of 100 (Routine)
St Albans	Canada	Record low minimum temperature	-32.8 C (-27.0 F)	8 of 100 (Routine)
Nicosia	Cyprus	Record low minimum temperature	-0.6 C (30.9 F)	8 of 100 (Routine)
Dubuque River	United States	Record low minimum temperature	-25.6 C (-14.1 F)	8 of 100 (Routine)
Thornborough	Australia	Record daily precipitation	26.4 mm (1.0 in)	7 of 100 (Routine)
Steynsburg	South Africa	Record daily precipitation	5.1 mm (0.20 in)	5 of 100 (Routine)
Nebo	Australia	Record daily precipitation	7.6 mm (0.30 in)	3 of 100 (Routine)
Parry Sound	Canada	Record low minimum temperature	-26.7 C (-16.1 F)	3 of 100 (Routine)
Southampton	Canada	Record low maximum temperature	-10.0 C (14.0 F)	3 of 100 (Routine)
Cap Madeleine	Canada	Record daily precipitation	20.3 mm (0.8 in)	3 of 100 (Routine)
Cap Madeleine	Canada	Record daily snowfall	20.3 cm (8.0 in)	3 of 100 (Routine)
Perth Regional Office	Australia	Record daily precipitation	2.8 mm (0.11 in)	2 of 100 (Routine)
Wychitella South	Australia	Record daily precipitation	13.2 mm (0.5 in)	2 of 100 (Routine)
Peterborough	Canada	Record low maximum temperature	-12.2 C (10.0 F)	2 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	-6.7 C (19.9 F)	2 of 100 (Routine)
Concord	United States	Record low maximum temperature	-6.7 C (19.9 F)	2 of 100 (Routine)
Vineland	United States	Record low maximum temperature	-4.4 C (24.1 F)	2 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high minimum temperature	8.9 C (48.0 F)	2 of 100 (Routine)
Port Stanley	Canada	Record low minimum temperature	-17.2 C (1.0 F)	1 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	-11.1 C (12.0 F)	1 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	-8.9 C (16.0 F)	1 of 100 (Routine)
Buffalo	United States	Record low minimum temperature	-15.0 C (5.0 F)	1 of 100 (Routine)
Wilmington Wb City	United States	Record low maximum temperature	1.7 C (35.1 F)	1 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	-3.9 C (25.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

40 records

Records set or tied on 15 December 1917 by type: Lowest daily maximum 15, Highest daily minimum 2, Lowest daily minimum 9, Heaviest daily rainfall 13, Heaviest daily snowfall 1.

Records on 15 December 1917 by type
Record type	Records
Highest daily maximum	0
Lowest daily maximum	15
Highest daily minimum	2
Lowest daily minimum	9
Heaviest daily rainfall	13
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 15 December 1917 by timescale: all-time 0, monthly 2, daily 38.

How Much Records Were Beaten By

22 broken records

Margins by which the 22 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.4. Ties are not counted.

Top 20 by Significance

15 December 1917

Top 20 records on 15 December 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 December 1917	Mackay Post Office, AU	daily rain	119.4 mm (4.7 in)	104.4 mm (4.1 in)	25 years	40 of 100 (Notable)
15 December 1917	Cairns Post Office, AU	daily rain	84.3 mm (3.3 in)	75.2 mm (3.0 in)	29 years	37 of 100 (Notable)
15 December 1917	Burdekin Shire Council, AU	daily rain	48.8 mm (1.9 in)	43.2 mm (1.7 in)	10 years	31 of 100 (Routine)
15 December 1917	Gorki, BY	monthly rain	28.5 mm (1.1 in)	3.5 mm (0.14 in)	10 years	28 of 100 (Routine)
15 December 1917	Bowen Post Office, AU	monthly rain	188.0 mm (7.4 in)	18.3 mm (0.7 in)	8 years	23 of 100 (Routine)
15 December 1917	Morpeth Post Office, AU	daily rain	38.1 mm (1.5 in)	26.7 mm (1.1 in)	2 years	21 of 100 (Routine)
15 December 1917	Brisbane Regional Office, AU	daily low max	25.4 C (77.7 F)	1.8 C (3.2 F)	29 years	17 of 100 (Routine)
15 December 1917	New Westminster, CA	daily rain	32.8 mm (1.3 in)	10.7 mm (0.4 in)	11 years	16 of 100 (Routine)
15 December 1917	Parry Sound, CA	daily low max	-15.6 C (3.9 F)	1.2 C (2.2 F)	33 years	16 of 100 (Routine)
15 December 1917	Lindsay, CA	daily low min	-25.6 C (-14.1 F)	1.7 C (3.1 F)	33 years	15 of 100 (Routine)
15 December 1917	Lakefield, CA	daily low max	-17.8 C (0.0 F)	3.9 C (7.0 F)	16 years	14 of 100 (Routine)
15 December 1917	Buffalo, US	daily low max	-10.0 C (14.0 F)	2.2 C (4.0 F)	16 years	12 of 100 (Routine)
15 December 1917	Wilmington Wb City, US	daily low min	-6.1 C (21.0 F)	1.7 C (3.1 F)	18 years	12 of 100 (Routine)
15 December 1917	Darwin Post Office, AU	daily low max	27.8 C (82.0 F)	0.5 C (0.9 F)	19 years	10 of 100 (Routine)
15 December 1917	Port Dover, CA	daily low max	-11.1 C (12.0 F)	1.1 C (2.0 F)	14 years	10 of 100 (Routine)
15 December 1917	Port Stanley, CA	daily low max	-10.0 C (14.0 F)	0.6 C (1.1 F)	14 years	9 of 100 (Routine)
15 December 1917	Welland, CA	daily low min	-19.4 C (-2.9 F)	1.6 C (2.9 F)	12 years	9 of 100 (Routine)
15 December 1917	St Albans, CA	daily low min	-32.8 C (-27.0 F)	1.1 C (2.0 F)	16 years	8 of 100 (Routine)
15 December 1917	Nicosia, CY	daily low min	-0.6 C (30.9 F)	1.2 C (2.2 F)	7 years	8 of 100 (Routine)
15 December 1917	Dubuque River, US	daily low min	-25.6 C (-14.1 F)	0.6 C (1.1 F)	16 years	8 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

1793 to 1917

Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 40 records.

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

Records on 12-15 in each year
Year	Records
1793	1
1796	1
1798	1
1800	1
1808	3
1810	1
1814	3
1815	1
1825	1
1831	1
1840	2
1844	2
1846	3
1847	1
1854	3
1859	2
1863	1
1864	1
1866	1
1867	2
1868	1
1869	1
1870	1
1873	1
1874	1
1878	4
1879	2
1880	2
1881	3
1882	2
1883	1
1885	1
1886	1
1889	3
1890	1
1891	2
1892	4
1893	1
1894	4
1895	1
1896	5
1897	2
1899	12
1900	5
1901	21
1902	3
1903	7
1904	9
1905	6
1906	9
1907	10
1908	5
1909	5
1910	4
1911	23
1912	42
1913	13
1914	239
1915	180
1916	40
1917	40
1918	54
1919	28
1920	35
1921	26
1922	65
1923	132
1924	358
1925	187
1926	226
1927	235
1928	388
1929	500
1930	160
1931	284
1932	385
1933	796
1934	199
1935	140
1936	286
1937	310
1938	100
1939	637
1940	464
1941	373
1942	385
1943	486
1944	281
1945	420
1946	521
1947	634
1948	1,239
1949	135
1950	292
1951	962
1952	367
1953	270
1954	413
1955	371
1956	531
1957	304
1958	531
1959	560
1960	313
1961	883
1962	979
1963	670
1964	371
1965	759
1966	275
1967	948
1968	510
1969	352
1970	215
1971	1,739
1972	1,159
1973	615
1974	511
1975	1,230
1976	349
1977	963
1978	499
1979	560
1980	1,085
1981	1,243
1982	831
1983	1,229
1984	1,397
1985	1,077
1986	502
1987	1,740
1988	519
1989	2,753
1990	846
1991	636
1992	1,263
1993	734
1994	676
1995	848
1996	727
1997	1,521
1998	1,216
1999	621
2000	1,154
2001	1,026
2002	831
2003	846
2004	795
2005	953
2006	1,491
2007	973
2008	1,789
2009	930
2010	1,705
2011	780
2012	1,058
2013	701
2014	1,045
2015	1,398
2016	1,024
2017	332
2018	539
2019	547
2020	400
2021	1,182
2022	1,057
2023	794
2024	369
2025	2,115

Download the Data

Data for records on 1917-12-15: 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 20	18
20 to 40	1
40 to 60	1
60 to 80	1
80 to 100	0
100 to 120	1