Weather Records on 17 December 1921

94 weather records were set or tied worldwide on 17 December 1921. Highest significance: Southampton, CA.

Key Facts for 17 December 1921

On 17 December 1921, 94 weather records were set or tied at long-record stations worldwide.
43 were record highs and 3 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 91 daily.
Southampton set a daily record precipitation of 27.4 mm (1.1 in) on 17 December 1921.
Across 160 earlier years (1793 to 2025) the same calendar date averaged 465 records.

Record Map

94 stations

94 station records on 17 December 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 December 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Southampton	Canada	Record daily precipitation	27.4 mm (1.1 in)	49 of 100 (Notable)
Wiarton	Canada	Record daily precipitation	45.0 mm (1.8 in)	46 of 100 (Notable)
Port Dover	Canada	Record daily precipitation	38.1 mm (1.5 in)	45 of 100 (Notable)
Guelph Oac	Canada	Record daily precipitation	28.2 mm (1.1 in)	39 of 100 (Notable)
London South	Canada	Record daily precipitation	47.5 mm (1.9 in)	24 of 100 (Routine)
Port Stanley	Canada	Record daily precipitation	40.6 mm (1.6 in)	23 of 100 (Routine)
Montreal McGill	Canada	Record daily snowfall	12.7 cm (5.0 in)	23 of 100 (Routine)
Welland	Canada	Record high maximum temperature	11.1 C (52.0 F)	21 of 100 (Routine)
Stockholm	Sweden	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Uppsala_Aut	Sweden	Record daily precipitation	15.9 mm (0.6 in)	20 of 100 (Routine)
Holmogadd A	Sweden	Record daily precipitation	22.3 mm (0.9 in)	20 of 100 (Routine)
Georgetown	Canada	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Svenska Hogarna	Sweden	Record daily precipitation	13.8 mm (0.5 in)	20 of 100 (Routine)
Toronto	Canada	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Vasteras-Hasslo	Sweden	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Gysinge	Sweden	Record daily precipitation	12.1 mm (0.5 in)	20 of 100 (Routine)
Peterborough	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Lindsay	Canada	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Ottawa Cda	Canada	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Malung	Sweden	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Clontarf	Canada	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Montreal McGill	Canada	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Southampton	Canada	Record high maximum temperature	8.9 C (48.0 F)	20 of 100 (Routine)
Paris	Canada	Record daily precipitation	27.9 mm (1.1 in)	20 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high maximum temperature	14.4 C (57.9 F)	20 of 100 (Routine)
Ottawa	Canada	Record high maximum temperature	3.9 C (39.0 F)	19 of 100 (Routine)
Ottawa Cda	Canada	Record daily snowfall	12.7 cm (5.0 in)	19 of 100 (Routine)
Owen Sound	Canada	Record high maximum temperature	10.6 C (51.1 F)	19 of 100 (Routine)
Chatham 2	Canada	Record daily precipitation	34.0 mm (1.3 in)	19 of 100 (Routine)
Lakefield	Canada	Record daily precipitation	26.4 mm (1.0 in)	19 of 100 (Routine)
Beatrice	Canada	Record high maximum temperature	5.6 C (42.1 F)	18 of 100 (Routine)
Brantford	Canada	Record high maximum temperature	10.6 C (51.1 F)	18 of 100 (Routine)
Brantford	Canada	Record daily precipitation	24.1 mm (0.9 in)	18 of 100 (Routine)
Stratford	Canada	Record high maximum temperature	10.0 C (50.0 F)	18 of 100 (Routine)
Gotska Sandon	Sweden	Record daily precipitation	11.0 mm (0.4 in)	18 of 100 (Routine)
Medicine Hat A	Canada	Record daily precipitation	1.0 mm (0.04 in)	17 of 100 (Routine)
Medicine Hat A	Canada	Record daily snowfall	1.0 cm (0.4 in)	17 of 100 (Routine)
London South	Canada	Record high maximum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Lindsay	Canada	Record high maximum temperature	7.2 C (45.0 F)	17 of 100 (Routine)
Alma	United States	Record daily precipitation	34.8 mm (1.4 in)	17 of 100 (Routine)
Cambridge Downs Station	Australia	Record daily precipitation	21.8 mm (0.9 in)	16 of 100 (Routine)
Barrie	Canada	Record high minimum temperature	0.0 C (32.0 F)	16 of 100 (Routine)
Welland	Canada	Record high minimum temperature	4.4 C (39.9 F)	16 of 100 (Routine)
Bancroft	Canada	Record high minimum temperature	3.3 C (37.9 F)	16 of 100 (Routine)
Parnu	Estonia	Record daily precipitation	8.5 mm (0.33 in)	16 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	12.8 C (55.0 F)	16 of 100 (Routine)
Buffalo	United States	Record high minimum temperature	6.1 C (43.0 F)	16 of 100 (Routine)
Harrisburg - Coop	United States	Record high maximum temperature	13.3 C (55.9 F)	16 of 100 (Routine)
Lucknow	Canada	Record high maximum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Port Dover	Canada	Record high minimum temperature	2.8 C (37.0 F)	15 of 100 (Routine)
Stratford	Canada	Record daily precipitation	16.5 mm (0.6 in)	15 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	2.8 C (37.0 F)	15 of 100 (Routine)
Haliburton A	Canada	Record high minimum temperature	2.8 C (37.0 F)	15 of 100 (Routine)
Stoney Creek	Canada	Record high minimum temperature	3.3 C (37.9 F)	14 of 100 (Routine)
Stoney Creek	Canada	Record daily precipitation	17.0 mm (0.7 in)	14 of 100 (Routine)
Landsort	Sweden	Record daily precipitation	10.2 mm (0.4 in)	14 of 100 (Routine)
Stoney Creek	Canada	Record high maximum temperature	10.6 C (51.1 F)	13 of 100 (Routine)
Vestervig	Denmark	Record high maximum temperature	10.8 C (51.4 F)	13 of 100 (Routine)
Jakutsk	Russia	Record low minimum temperature	-54.2 C (-65.6 F)	13 of 100 (Routine)
London South	Canada	Record high minimum temperature	2.8 C (37.0 F)	12 of 100 (Routine)

Counts by Type and Timescale

94 records

Records set or tied on 17 December 1921 by type: Highest daily maximum 27, Lowest daily maximum 1, Highest daily minimum 16, Lowest daily minimum 2, Heaviest daily rainfall 42, Heaviest daily snowfall 6.

Records on 17 December 1921 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	1
Highest daily minimum	16
Lowest daily minimum	2
Heaviest daily rainfall	42
Heaviest daily snowfall	6
Deepest snow cover	0

Records on 17 December 1921 by timescale: all-time 0, monthly 3, daily 91.

How Much Records Were Beaten By

83 broken records

Margins by which the 83 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 51.0. Ties are not counted.

Top 20 by Significance

17 December 1921

Top 20 records on 17 December 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 1921	Southampton, CA	daily rain	27.4 mm (1.1 in)	17.2 mm (0.7 in)	36 years	49 of 100 (Notable)
17 December 1921	Wiarton, CA	daily rain	45.0 mm (1.8 in)	37.4 mm (1.5 in)	11 years	46 of 100 (Notable)
17 December 1921	Port Dover, CA	daily rain	38.1 mm (1.5 in)	24.1 mm (0.9 in)	6 years	45 of 100 (Notable)
17 December 1921	Guelph Oac, CA	daily rain	28.2 mm (1.1 in)	21.8 mm (0.9 in)	6 years	39 of 100 (Notable)
17 December 1921	London South, CA	monthly rain	47.5 mm (1.9 in)	1.0 mm (0.04 in)	34 years	24 of 100 (Routine)
17 December 1921	Port Stanley, CA	monthly rain	40.6 mm (1.6 in)	2.8 mm (0.11 in)	15 years	23 of 100 (Routine)
17 December 1921	Montreal McGill, CA	daily snowfall	12.7 cm (5.0 in)	3.3 cm (1.3 in)	45 years	23 of 100 (Routine)
17 December 1921	Welland, CA	daily high max	11.1 C (52.0 F)	2.2 C (4.0 F)	43 years	21 of 100 (Routine)
17 December 1921	Stockholm, SE	daily rain	18.8 mm (0.7 in)	12.4 mm (0.5 in)	21 years	20 of 100 (Routine)
17 December 1921	Uppsala_Aut, SE	daily rain	15.9 mm (0.6 in)	2.5 mm (0.10 in)	79 years	20 of 100 (Routine)
17 December 1921	Holmogadd A, SE	monthly rain	22.3 mm (0.9 in)	4.1 mm (0.16 in)	30 years	20 of 100 (Routine)
17 December 1921	Georgetown, CA	daily rain	24.9 mm (1.0 in)	13.2 mm (0.5 in)	23 years	20 of 100 (Routine)
17 December 1921	Svenska Hogarna, SE	daily rain	13.8 mm (0.5 in)	6.3 mm (0.25 in)	19 years	20 of 100 (Routine)
17 December 1921	Toronto, CA	daily rain	22.9 mm (0.9 in)	6.4 mm (0.25 in)	44 years	20 of 100 (Routine)
17 December 1921	Vasteras-Hasslo, SE	daily rain	13.0 mm (0.5 in)	6.5 mm (0.26 in)	11 years	20 of 100 (Routine)
17 December 1921	Gysinge, SE	daily rain	12.1 mm (0.5 in)	5.9 mm (0.23 in)	24 years	20 of 100 (Routine)
17 December 1921	Peterborough, CA	daily rain	20.3 mm (0.8 in)	10.1 mm (0.4 in)	23 years	20 of 100 (Routine)
17 December 1921	Lindsay, CA	daily rain	21.8 mm (0.9 in)	7.8 mm (0.31 in)	23 years	20 of 100 (Routine)
17 December 1921	Ottawa Cda, CA	daily rain	16.3 mm (0.6 in)	8.7 mm (0.34 in)	23 years	20 of 100 (Routine)
17 December 1921	Malung, SE	daily rain	12.7 mm (0.5 in)	5.6 mm (0.22 in)	14 years	20 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 1921

Records set or tied on this calendar date in each year from 1793 to 1921. 1921 had 94 records.

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

Records on 12-17 in each year
Year	Records
1793	2
1796	1
1806	2
1808	2
1814	1
1815	1
1839	1
1845	1
1846	4
1847	1
1848	1
1859	3
1866	1
1867	1
1868	1
1869	2
1873	2
1876	3
1877	2
1878	1
1879	2
1881	2
1885	1
1886	1
1888	2
1889	2
1890	4
1892	4
1893	2
1894	4
1895	3
1896	4
1897	4
1898	2
1899	1
1900	6
1901	5
1902	47
1903	2
1904	14
1905	2
1906	17
1907	9
1908	13
1909	5
1910	37
1911	12
1912	15
1913	21
1914	17
1915	31
1916	21
1917	21
1918	21
1919	109
1920	97
1921	94
1922	120
1923	170
1924	505
1925	79
1926	172
1927	143
1928	359
1929	221
1930	362
1931	217
1932	684
1933	710
1934	200
1935	87
1936	504
1937	379
1938	118
1939	1,126
1940	248
1941	261
1942	507
1943	444
1944	189
1945	621
1946	207
1947	258
1948	316
1949	296
1950	294
1951	773
1952	277
1953	283
1954	409
1955	419
1956	448
1957	686
1958	540
1959	548
1960	492
1961	911
1962	676
1963	531
1964	1,239
1965	482
1966	516
1967	1,121
1968	338
1969	238
1970	820
1971	781
1972	601
1973	1,016
1974	390
1975	474
1976	507
1977	1,024
1978	710
1979	951
1980	1,116
1981	1,354
1982	569
1983	1,264
1984	1,618
1985	1,210
1986	743
1987	1,191
1988	481
1989	2,905
1990	866
1991	577
1992	1,461
1993	761
1994	685
1995	956
1996	1,212
1997	1,279
1998	695
1999	901
2000	1,566
2001	1,262
2002	858
2003	751
2004	554
2005	806
2006	1,307
2007	1,100
2008	1,354
2009	926
2010	1,405
2011	430
2012	942
2013	718
2014	370
2015	1,378
2016	1,521
2017	408
2018	498
2019	917
2020	768
2021	908
2022	595
2023	931
2024	560
2025	1,198

Download the Data

Data for records on 1921-12-17: 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	70
10 to 20	8
20 to 30	2
30 to 40	2
40 to 50	0
50 to 60	1