Weather Records on 29 December 1917

145 weather records were set or tied worldwide on 29 December 1917. Highest significance: Quebec, CA.

Key Facts for 29 December 1917

On 29 December 1917, 145 weather records were set or tied at long-record stations worldwide.
12 were record highs and 101 were record lows, counting maximum and minimum temperature.
By timescale, 10 were all-time records, 24 monthly and 111 daily.
Quebec set an all-time record low maximum temperature of -30.0 C (-22.0 F) on 29 December 1917.
Across 161 earlier years (1799 to 2025) the same calendar date averaged 485 records.

Record Map

145 stations

145 station records on 29 December 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 29 December 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Quebec	Canada	Record low maximum temperature	-30.0 C (-22.0 F)	38 of 100 (Notable)
Toronto	Canada	Record low minimum temperature	-27.2 C (-17.0 F)	34 of 100 (Routine)
Owen Sound	Canada	Record low maximum temperature	-20.0 C (-4.0 F)	33 of 100 (Routine)
Portland	United States	Record low maximum temperature	-19.4 C (-2.9 F)	33 of 100 (Routine)
Toronto	Canada	Record low maximum temperature	-19.4 C (-2.9 F)	32 of 100 (Routine)
Ottawa	Canada	Record low maximum temperature	-25.0 C (-13.0 F)	30 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	-16.7 C (1.9 F)	29 of 100 (Routine)
Montreal McGill	Canada	Record low maximum temperature	-28.9 C (-20.0 F)	29 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	-17.8 C (0.0 F)	28 of 100 (Routine)
Buffalo	United States	Record low maximum temperature	-17.8 C (0.0 F)	28 of 100 (Routine)
Newark Liberty Intl AP	United States	Record low minimum temperature	-18.9 C (-2.0 F)	28 of 100 (Routine)
Concord	United States	Record low maximum temperature	-20.6 C (-5.1 F)	27 of 100 (Routine)
Minnedosa	Canada	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
Kingston Queens U	Canada	Record low maximum temperature	-23.3 C (-9.9 F)	26 of 100 (Routine)
Stonecliffe	Canada	Record low maximum temperature	-27.8 C (-18.0 F)	26 of 100 (Routine)
Beatrice	Canada	Record low minimum temperature	-38.9 C (-38.0 F)	26 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	-18.3 C (-0.9 F)	26 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	-18.3 C (-0.9 F)	26 of 100 (Routine)
Lindsay	Canada	Record low maximum temperature	-24.4 C (-11.9 F)	26 of 100 (Routine)
Algiers-Ville/Universite	Algeria	Record low maximum temperature	7.0 C (44.6 F)	25 of 100 (Routine)
Beatrice	Canada	Record low maximum temperature	-24.4 C (-11.9 F)	25 of 100 (Routine)
Alton	Canada	Record low maximum temperature	-18.9 C (-2.0 F)	25 of 100 (Routine)
Quebec	Canada	Record low minimum temperature	-35.0 C (-31.0 F)	25 of 100 (Routine)
Burlington	United States	Record low maximum temperature	-26.7 C (-16.1 F)	25 of 100 (Routine)
Northfield	United States	Record low maximum temperature	-26.1 C (-15.0 F)	25 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	13.9 C (57.0 F)	25 of 100 (Routine)
Parry Sound	Canada	Record low minimum temperature	-36.7 C (-34.1 F)	24 of 100 (Routine)
Southampton	Canada	Record low minimum temperature	-24.4 C (-11.9 F)	24 of 100 (Routine)
Bad Muskau	Germany	Record snow depth	15.0 cm (5.9 in)	24 of 100 (Routine)
Fort National	Algeria	Record low maximum temperature	0.0 C (32.0 F)	23 of 100 (Routine)
Lakefield	Canada	Record low minimum temperature	-32.8 C (-27.0 F)	23 of 100 (Routine)
Setauket Strong	United States	Record low minimum temperature	-18.9 C (-2.0 F)	23 of 100 (Routine)
Olympia Priest Pt Park	United States	Record high minimum temperature	12.2 C (54.0 F)	23 of 100 (Routine)
Atlantic City Marina	United States	Record low minimum temperature	-18.3 C (-0.9 F)	23 of 100 (Routine)
Cape May 2 NW	United States	Record low minimum temperature	-15.6 C (3.9 F)	22 of 100 (Routine)
World Trade Ctr	United States	Record low maximum temperature	-13.3 C (8.1 F)	22 of 100 (Routine)
Ottawa	Canada	Record low minimum temperature	-32.8 C (-27.0 F)	21 of 100 (Routine)
Parry Sound	Canada	Record low maximum temperature	-23.9 C (-11.0 F)	21 of 100 (Routine)
Peterborough	Canada	Record low minimum temperature	-32.8 C (-27.0 F)	21 of 100 (Routine)
Jena Sternwarte	Germany	Record snow depth	15.0 cm (5.9 in)	21 of 100 (Routine)
Freiburg	Germany	Record low minimum temperature	-18.6 C (-1.5 F)	21 of 100 (Routine)
Minnedosa	Canada	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Hamilton	Canada	Record low minimum temperature	-24.4 C (-11.9 F)	20 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	-23.3 C (-9.9 F)	20 of 100 (Routine)
Baltimore Customs House	United States	Record low maximum temperature	-10.6 C (12.9 F)	20 of 100 (Routine)
Philadelphia City	United States	Record low minimum temperature	-18.3 C (-0.9 F)	20 of 100 (Routine)
Algiers-Ville/Universite	Algeria	Record low minimum temperature	1.0 C (33.8 F)	19 of 100 (Routine)
Gorki	Belarus	Record daily precipitation	8.3 mm (0.33 in)	19 of 100 (Routine)
Owen Sound	Canada	Record low minimum temperature	-23.9 C (-11.0 F)	19 of 100 (Routine)
Southampton	Canada	Record low maximum temperature	-17.2 C (1.0 F)	19 of 100 (Routine)
Port Stanley	Canada	Record low maximum temperature	-12.2 C (10.0 F)	19 of 100 (Routine)
London South	Canada	Record low maximum temperature	-13.3 C (8.1 F)	19 of 100 (Routine)
Halifax	Canada	Record low minimum temperature	-18.3 C (-0.9 F)	19 of 100 (Routine)
Sydney	Canada	Record daily snowfall	16.5 cm (6.5 in)	19 of 100 (Routine)
Portland	United States	Record low minimum temperature	-24.4 C (-11.9 F)	19 of 100 (Routine)
Welland	Canada	Record low maximum temperature	-16.1 C (3.0 F)	18 of 100 (Routine)
Lindsay	Canada	Record low minimum temperature	-33.9 C (-29.0 F)	18 of 100 (Routine)
Huron Rgnl AP	United States	Record low minimum temperature	-36.1 C (-33.0 F)	18 of 100 (Routine)
Moose Factory	Canada	Record low maximum temperature	-28.9 C (-20.0 F)	17 of 100 (Routine)
Pointe Au Pere	Canada	Record low minimum temperature	-28.9 C (-20.0 F)	17 of 100 (Routine)

Counts by Type and Timescale

145 records

Records set or tied on 29 December 1917 by type: Highest daily maximum 9, Lowest daily maximum 46, Highest daily minimum 3, Lowest daily minimum 55, Heaviest daily rainfall 20, Heaviest daily snowfall 9, Deepest snow cover 3.

Records on 29 December 1917 by type
Record type	Records
Highest daily maximum	9
Lowest daily maximum	46
Highest daily minimum	3
Lowest daily minimum	55
Heaviest daily rainfall	20
Heaviest daily snowfall	9
Deepest snow cover	3

Records on 29 December 1917 by timescale: all-time 10, monthly 24, daily 111.

How Much Records Were Beaten By

125 broken records

Margins by which the 125 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.0. Ties are not counted.

Top 20 by Significance

29 December 1917

Top 20 records on 29 December 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 December 1917	Quebec, CA	all-time low max	-30.0 C (-22.0 F)	3.3 C (5.9 F)	33 years	38 of 100 (Notable)
29 December 1917	Toronto, CA	daily low min	-27.2 C (-17.0 F)	5.0 C (9.0 F)	63 years	34 of 100 (Routine)
29 December 1917	Owen Sound, CA	monthly low max	-20.0 C (-4.0 F)	4.4 C (7.9 F)	36 years	33 of 100 (Routine)
29 December 1917	Portland, US	all-time low max	-19.4 C (-2.9 F)	2.2 C (4.0 F)	22 years	33 of 100 (Routine)
29 December 1917	Toronto, CA	monthly low max	-19.4 C (-2.9 F)	0.5 C (0.9 F)	50 years	32 of 100 (Routine)
29 December 1917	Ottawa, CA	daily low max	-25.0 C (-13.0 F)	8.3 C (14.9 F)	44 years	30 of 100 (Routine)
29 December 1917	Hamilton, CA	monthly low max	-16.7 C (1.9 F)	1.7 C (3.1 F)	36 years	29 of 100 (Routine)
29 December 1917	Montreal McGill, CA	all-time low max	-28.9 C (-20.0 F)	2.8 C (5.0 F)	3 years	29 of 100 (Routine)
29 December 1917	Port Dover, CA	monthly low max	-17.8 C (0.0 F)	1.7 C (3.1 F)	36 years	28 of 100 (Routine)
29 December 1917	Buffalo, US	monthly low max	-17.8 C (0.0 F)	2.2 C (4.0 F)	36 years	28 of 100 (Routine)
29 December 1917	Newark Liberty Intl AP, US	daily low min	-18.9 C (-2.0 F)	2.2 C (4.0 F)	57 years	28 of 100 (Routine)
29 December 1917	Concord, US	all-time low max	-20.6 C (-5.1 F)	0.6 C (1.1 F)	3 years	27 of 100 (Routine)
29 December 1917	Minnedosa, CA	daily snowfall	5.1 cm (2.0 in)	4.6 cm (1.8 in)	16 years	26 of 100 (Routine)
29 December 1917	Kingston Queens U, CA	all-time low max	-23.3 C (-9.9 F)	1.1 C (2.0 F)	3 years	26 of 100 (Routine)
29 December 1917	Stonecliffe, CA	monthly low max	-27.8 C (-18.0 F)	2.2 C (4.0 F)	33 years	26 of 100 (Routine)
29 December 1917	Beatrice, CA	monthly low min	-38.9 C (-38.0 F)	2.8 C (5.0 F)	33 years	26 of 100 (Routine)
29 December 1917	Lucknow, CA	monthly low max	-18.3 C (-0.9 F)	4.4 C (7.9 F)	17 years	26 of 100 (Routine)
29 December 1917	Guelph Oac, CA	monthly low max	-18.3 C (-0.9 F)	2.2 C (4.0 F)	33 years	26 of 100 (Routine)
29 December 1917	Lindsay, CA	daily low max	-24.4 C (-11.9 F)	7.2 C (13.0 F)	36 years	26 of 100 (Routine)
29 December 1917	Algiers-Ville/Universite, DZ	daily low max	7.0 C (44.6 F)	4.4 C (7.9 F)	22 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 145 records.

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

Records on 12-29 in each year
Year	Records
1799	1
1810	1
1824	1
1829	1
1839	2
1853	2
1864	1
1865	1
1866	1
1867	1
1868	2
1870	1
1871	1
1872	2
1873	1
1874	2
1876	2
1877	2
1878	1
1880	6
1881	4
1882	2
1884	1
1885	1
1886	1
1887	3
1889	2
1890	7
1891	3
1893	2
1894	3
1895	1
1896	1
1897	8
1898	7
1899	4
1900	1
1901	18
1902	8
1903	10
1904	16
1905	19
1906	14
1907	10
1908	21
1909	18
1910	7
1911	6
1912	52
1913	12
1914	46
1915	47
1916	69
1917	145
1918	33
1919	157
1920	68
1921	60
1922	42
1923	126
1924	119
1925	209
1926	117
1927	350
1928	93
1929	262
1930	96
1931	363
1932	192
1933	479
1934	406
1935	392
1936	552
1937	280
1938	178
1939	272
1940	648
1941	110
1942	458
1943	232
1944	226
1945	497
1946	1,122
1947	310
1948	711
1949	217
1950	286
1951	571
1952	156
1953	205
1954	955
1955	373
1956	563
1957	527
1958	442
1959	251
1960	404
1961	525
1962	754
1963	285
1964	533
1965	634
1966	719
1967	867
1968	1,028
1969	964
1970	694
1971	660
1972	1,001
1973	674
1974	719
1975	646
1976	748
1977	656
1978	1,349
1979	830
1980	959
1981	713
1982	1,565
1983	2,576
1984	2,687
1985	551
1986	752
1987	1,484
1988	1,082
1989	633
1990	1,861
1991	630
1992	1,099
1993	905
1994	965
1995	1,202
1996	2,213
1997	1,114
1998	783
1999	1,207
2000	1,677
2001	599
2002	959
2003	951
2004	909
2005	858
2006	1,219
2007	1,046
2008	753
2009	1,027
2010	1,308
2011	748
2012	805
2013	714
2014	506
2015	1,440
2016	620
2017	1,559
2018	440
2019	1,471
2020	504
2021	1,098
2022	516
2023	900
2024	931
2025	637

Download the Data

Data for records on 1917-12-29: 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 10	115
10 to 20	6
20 to 30	1
30 to 40	0
40 to 50	1
50 to 60	0
60 to 70	2