Weather Records on 1 December 1930

128 weather records were set or tied worldwide on 1 December 1930. Highest significance: Bologna, IT.

Key Facts for 1 December 1930

On 1 December 1930, 128 weather records were set or tied at long-record stations worldwide.
30 were record highs and 49 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 123 daily.
Bologna set a monthly record high minimum temperature of 11.5 C (52.7 F) on 1 December 1930.
Across 162 earlier years (1797 to 2025) the same calendar date averaged 486 records.

Record Map

128 stations

128 station records on 1 December 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 December 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bologna	Italy	Record high minimum temperature	11.5 C (52.7 F)	52 of 100 (Notable)
Warren	United States	Record daily precipitation	50.0 mm (2.0 in)	46 of 100 (Notable)
Yarmouth	Canada	Record daily precipitation	49.3 mm (1.9 in)	40 of 100 (Notable)
Effingham	United States	Record daily precipitation	40.9 mm (1.6 in)	40 of 100 (Notable)
Sussex	Canada	Record daily precipitation	41.1 mm (1.6 in)	34 of 100 (Routine)
Setif	Algeria	Record high minimum temperature	11.0 C (51.8 F)	31 of 100 (Routine)
Halifax	Canada	Record daily precipitation	46.7 mm (1.8 in)	29 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	-11.1 C (12.0 F)	25 of 100 (Routine)
Saint John	Canada	Record daily precipitation	34.8 mm (1.4 in)	23 of 100 (Routine)
Wilmington Wb City	United States	Record daily precipitation	25.9 mm (1.0 in)	23 of 100 (Routine)
Ft Duchesne	United States	Record low minimum temperature	-22.2 C (-8.0 F)	23 of 100 (Routine)
Biskra	Algeria	Record high minimum temperature	13.0 C (55.4 F)	22 of 100 (Routine)
Emu Park Hill St	Australia	Record daily precipitation	66.0 mm (2.6 in)	22 of 100 (Routine)
Parry Sound	Canada	Record low maximum temperature	-12.2 C (10.0 F)	22 of 100 (Routine)
Wolfville	Canada	Record daily precipitation	37.8 mm (1.5 in)	22 of 100 (Routine)
Harrisville	United States	Record low minimum temperature	-21.1 C (-6.0 F)	22 of 100 (Routine)
Orleansville (Chlef)	Algeria	Record high maximum temperature	23.0 C (73.4 F)	21 of 100 (Routine)
Coldwater	Canada	Record daily snowfall	16.5 cm (6.5 in)	21 of 100 (Routine)
Louisburg	United States	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Coldwater	Canada	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Geryville (El-Bayadh)	Algeria	Record daily precipitation	21.0 mm (0.8 in)	20 of 100 (Routine)
Manilla Post Office	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Darlington	United States	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Eastport	United States	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Kremsmuenster	Austria	Record high minimum temperature	5.2 C (41.4 F)	20 of 100 (Routine)
Moncton	Canada	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Farmington	United States	Record low maximum temperature	-2.8 C (27.0 F)	20 of 100 (Routine)
Salzburg	Austria	Record high minimum temperature	4.7 C (40.5 F)	19 of 100 (Routine)
Ocala	United States	Record daily precipitation	67.3 mm (2.6 in)	19 of 100 (Routine)
Logan Utah St UNIV	United States	Record low maximum temperature	-5.0 C (23.0 F)	19 of 100 (Routine)
Tooele	United States	Record low maximum temperature	-4.4 C (24.1 F)	19 of 100 (Routine)
Tooele	United States	Record low minimum temperature	-12.8 C (9.0 F)	19 of 100 (Routine)
Pointe Riche	Canada	Record daily precipitation	20.6 mm (0.8 in)	18 of 100 (Routine)
Eutawville	United States	Record daily precipitation	41.1 mm (1.6 in)	18 of 100 (Routine)
Constantine	Algeria	Record high minimum temperature	9.0 C (48.2 F)	17 of 100 (Routine)
Masset Airport	Canada	Record high minimum temperature	7.2 C (45.0 F)	17 of 100 (Routine)
Drobeta Turnu Severin	Romania	Record high maximum temperature	18.2 C (64.8 F)	17 of 100 (Routine)
Bajramaly	Turkmenistan	Record daily precipitation	9.3 mm (0.37 in)	17 of 100 (Routine)
Albany 3 SE	United States	Record daily precipitation	30.5 mm (1.2 in)	17 of 100 (Routine)
Calumet	United States	Record low maximum temperature	-15.0 C (5.0 F)	17 of 100 (Routine)
Calumet	United States	Record low minimum temperature	-20.6 C (-5.1 F)	17 of 100 (Routine)
Mackinaw City 2	United States	Record low minimum temperature	-15.6 C (3.9 F)	17 of 100 (Routine)
Duck Hill	United States	Record daily precipitation	27.9 mm (1.1 in)	17 of 100 (Routine)
Romney 1 SW	United States	Record daily precipitation	5.3 mm (0.21 in)	17 of 100 (Routine)
Mirani Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	16 of 100 (Routine)
Coldwater	Canada	Record low maximum temperature	-11.1 C (12.0 F)	16 of 100 (Routine)
Blackfoot Fire Dept	United States	Record low maximum temperature	-4.4 C (24.1 F)	16 of 100 (Routine)
Fillmore	United States	Record low maximum temperature	-3.9 C (25.0 F)	16 of 100 (Routine)
Ft Duchesne	United States	Record low maximum temperature	-6.7 C (19.9 F)	16 of 100 (Routine)
Salem AP (McNary Field)	United States	Record low minimum temperature	-4.4 C (24.1 F)	16 of 100 (Routine)
Alice Springs Post Office	Australia	Record low maximum temperature	22.2 C (72.0 F)	15 of 100 (Routine)
White River	Canada	Record low maximum temperature	-22.8 C (-9.0 F)	15 of 100 (Routine)
Marseille Obs. Palais-Lonchamp	France	Record high maximum temperature	20.7 C (69.3 F)	15 of 100 (Routine)
Storrs	United States	Record daily precipitation	19.1 mm (0.8 in)	15 of 100 (Routine)
Tampa	United States	Record daily precipitation	25.7 mm (1.0 in)	15 of 100 (Routine)
Blackville 3 W	United States	Record daily precipitation	24.1 mm (0.9 in)	15 of 100 (Routine)
Deseret	United States	Record low maximum temperature	-5.0 C (23.0 F)	15 of 100 (Routine)
Orleansville (Chlef)	Algeria	Record high minimum temperature	13.0 C (55.4 F)	14 of 100 (Routine)
Old Halls Creek	Australia	Record daily precipitation	29.2 mm (1.1 in)	14 of 100 (Routine)
Halifax Macrossan St	Australia	Record daily precipitation	25.7 mm (1.0 in)	14 of 100 (Routine)

Counts by Type and Timescale

128 records

Records set or tied on 1 December 1930 by type: Highest daily maximum 9, Lowest daily maximum 19, Highest daily minimum 21, Lowest daily minimum 30, Heaviest daily rainfall 43, Heaviest daily snowfall 5, Deepest snow cover 1.

Records on 1 December 1930 by type
Record type	Records
Highest daily maximum	9
Lowest daily maximum	19
Highest daily minimum	21
Lowest daily minimum	30
Heaviest daily rainfall	43
Heaviest daily snowfall	5
Deepest snow cover	1

Records on 1 December 1930 by timescale: all-time 0, monthly 5, daily 123.

How Much Records Were Beaten By

108 broken records

Margins by which the 108 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 57.9. Ties are not counted.

Top 20 by Significance

1 December 1930

Top 20 records on 1 December 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 December 1930	Bologna, IT	monthly high min	11.5 C (52.7 F)	0.9 C (1.6 F)	104 years	52 of 100 (Notable)
1 December 1930	Warren, US	daily rain	50.0 mm (2.0 in)	32.2 mm (1.3 in)	12 years	46 of 100 (Notable)
1 December 1930	Yarmouth, CA	daily rain	49.3 mm (1.9 in)	28.7 mm (1.1 in)	7 years	40 of 100 (Notable)
1 December 1930	Effingham, US	daily rain	40.9 mm (1.6 in)	30.7 mm (1.2 in)	28 years	40 of 100 (Notable)
1 December 1930	Sussex, CA	daily rain	41.1 mm (1.6 in)	27.1 mm (1.1 in)	20 years	34 of 100 (Routine)
1 December 1930	Setif, DZ	monthly high min	11.0 C (51.8 F)	1.0 C (1.8 F)	43 years	31 of 100 (Routine)
1 December 1930	Halifax, CA	daily rain	46.7 mm (1.8 in)	13.4 mm (0.5 in)	39 years	29 of 100 (Routine)
1 December 1930	Guelph Oac, CA	daily low max	-11.1 C (12.0 F)	4.4 C (7.9 F)	42 years	25 of 100 (Routine)
1 December 1930	Saint John, CA	daily rain	34.8 mm (1.4 in)	3.0 mm (0.12 in)	48 years	23 of 100 (Routine)
1 December 1930	Wilmington Wb City, US	daily rain	25.9 mm (1.0 in)	0.8 mm (0.03 in)	58 years	23 of 100 (Routine)
1 December 1930	Ft Duchesne, US	daily low min	-22.2 C (-8.0 F)	4.9 C (8.8 F)	42 years	23 of 100 (Routine)
1 December 1930	Biskra, DZ	daily high min	13.0 C (55.4 F)	1.0 C (1.8 F)	48 years	22 of 100 (Routine)
1 December 1930	Emu Park Hill St, AU	daily rain	66.0 mm (2.6 in)	57.9 mm (2.3 in)	7 years	22 of 100 (Routine)
1 December 1930	Parry Sound, CA	daily low max	-12.2 C (10.0 F)	1.1 C (2.0 F)	53 years	22 of 100 (Routine)
1 December 1930	Wolfville, CA	daily rain	37.8 mm (1.5 in)	7.3 mm (0.29 in)	27 years	22 of 100 (Routine)
1 December 1930	Harrisville, US	daily low min	-21.1 C (-6.0 F)	5.0 C (9.0 F)	33 years	22 of 100 (Routine)
1 December 1930	Orleansville (Chlef), DZ	daily high max	23.0 C (73.4 F)	3.0 C (5.4 F)	21 years	21 of 100 (Routine)
1 December 1930	Coldwater, CA	daily snowfall	16.5 cm (6.5 in)	5.1 cm (2.0 in)	32 years	21 of 100 (Routine)
1 December 1930	Louisburg, US	daily rain	18.8 mm (0.7 in)	18.8 mm (0.7 in)	36 years	20 of 100 (Routine)
1 December 1930	Coldwater, CA	daily rain	16.5 mm (0.6 in)	4.8 mm (0.19 in)	46 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

1797 to 1930

Records set or tied on this calendar date in each year from 1797 to 1930. 1930 had 128 records.

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

Records on 12-01 in each year
Year	Records
1797	1
1805	1
1807	2
1810	1
1817	2
1821	1
1823	2
1831	1
1849	1
1856	3
1857	1
1858	1
1861	1
1863	1
1869	2
1871	1
1872	3
1873	6
1875	8
1876	4
1877	1
1879	7
1884	3
1885	3
1886	1
1887	2
1888	3
1889	2
1890	6
1891	1
1892	2
1893	1
1894	1
1895	4
1896	4
1897	10
1898	5
1899	4
1901	5
1902	7
1903	13
1904	4
1905	11
1906	3
1907	8
1908	40
1909	64
1910	39
1911	45
1912	37
1913	53
1914	142
1915	23
1916	29
1917	52
1918	32
1919	78
1920	192
1921	55
1922	85
1923	70
1924	135
1925	145
1926	115
1927	271
1928	85
1929	515
1930	128
1931	337
1932	383
1933	656
1934	667
1935	164
1936	433
1937	238
1938	159
1939	346
1940	300
1941	391
1942	424
1943	93
1944	478
1945	259
1946	224
1947	392
1948	252
1949	313
1950	437
1951	585
1952	762
1953	283
1954	308
1955	624
1956	338
1957	295
1958	531
1959	355
1960	258
1961	373
1962	1,073
1963	282
1964	1,181
1965	598
1966	995
1967	601
1968	883
1969	673
1970	1,299
1971	574
1972	843
1973	888
1974	1,339
1975	1,007
1976	1,294
1977	1,166
1978	777
1979	874
1980	1,019
1981	1,320
1982	1,759
1983	1,275
1984	513
1985	3,874
1986	803
1987	1,020
1988	538
1989	822
1990	514
1991	2,124
1992	552
1993	597
1994	717
1995	1,386
1996	1,448
1997	736
1998	1,698
1999	790
2000	777
2001	1,211
2002	637
2003	627
2004	1,033
2005	815
2006	2,866
2007	1,427
2008	879
2009	927
2010	1,991
2011	947
2012	1,027
2013	400
2014	677
2015	850
2016	384
2017	496
2018	807
2019	803
2020	567
2021	2,030
2022	584
2023	609
2024	636
2025	679

Download the Data

Data for records on 1930-12-01: 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).

Histogram of margins by which records were beaten on 1 December 1930
Margin	Records
0 to 10	87
10 to 20	11
20 to 30	5
30 to 40	2
40 to 50	1
50 to 60	2