Weather Records on 30 December 1940

397 weather records were set or tied worldwide on 30 December 1940. Highest significance: Brocken, DE.

Key Facts for 30 December 1940

On 30 December 1940, 397 weather records were set or tied at long-record stations worldwide.
214 were record highs and 15 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 15 monthly and 382 daily.
Brocken set a monthly record daily precipitation of 88.4 mm (3.5 in) on 30 December 1940.
Across 154 earlier years (1799 to 2025) the same calendar date averaged 496 records.

Record Map

397 stations

397 station records on 30 December 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 December 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brocken	Germany	Record daily precipitation	88.4 mm (3.5 in)	61 of 100 (Major)
Grayling	United States	Record daily snowfall	33.0 cm (13.0 in)	58 of 100 (Notable)
Altastenberg	Germany	Record daily precipitation	42.8 mm (1.7 in)	54 of 100 (Notable)
Woodstock	Canada	Record daily precipitation	27.9 mm (1.1 in)	52 of 100 (Notable)
Payson Rs	United States	Record daily precipitation	48.5 mm (1.9 in)	50 of 100 (Notable)
Zerbst	Germany	Record daily precipitation	25.5 mm (1.0 in)	48 of 100 (Notable)
Brindley Park 2	Australia	Record daily precipitation	55.9 mm (2.2 in)	43 of 100 (Notable)
Artern	Germany	Record daily precipitation	25.7 mm (1.0 in)	43 of 100 (Notable)
Cap Chat	Canada	Record daily snowfall	31.0 cm (12.2 in)	42 of 100 (Notable)
Edgeley 3WNW	United States	Record snow depth	10.2 cm (4.0 in)	42 of 100 (Notable)
Cap Chat	Canada	Record daily precipitation	31.0 mm (1.2 in)	41 of 100 (Notable)
Higgins Lake	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Granite Reef Dam	United States	Record daily precipitation	43.2 mm (1.7 in)	38 of 100 (Notable)
Roosevelt 1 S	United States	Record daily precipitation	59.4 mm (2.3 in)	36 of 100 (Notable)
Premer Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Bad Muskau	Germany	Record daily precipitation	33.7 mm (1.3 in)	34 of 100 (Routine)
Maricopa 9 SSW	United States	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Adelong Post Office	Australia	Record daily precipitation	38.9 mm (1.5 in)	32 of 100 (Routine)
Storlien	Sweden	Record low minimum temperature	-35.4 C (-31.7 F)	32 of 100 (Routine)
Wanaaring Post Office	Australia	Record daily precipitation	41.9 mm (1.6 in)	30 of 100 (Routine)
Mercadool	Australia	Record daily precipitation	64.8 mm (2.6 in)	30 of 100 (Routine)
Woodburn Post Office	Australia	Record daily precipitation	57.9 mm (2.3 in)	30 of 100 (Routine)
Chicoutimi	Canada	Record daily snowfall	20.3 cm (8.0 in)	29 of 100 (Routine)
Chicoutimi	Canada	Record high minimum temperature	-0.6 C (30.9 F)	27 of 100 (Routine)
Scheveningen	Netherlands	Record daily precipitation	28.2 mm (1.1 in)	27 of 100 (Routine)
Rivertree (Myall)	Australia	Record daily precipitation	47.8 mm (1.9 in)	26 of 100 (Routine)
Lakes Entrance Post Office	Australia	Record daily precipitation	36.3 mm (1.4 in)	26 of 100 (Routine)
Altastenberg	Germany	Record snow depth	140.0 cm (55.1 in)	26 of 100 (Routine)
Sturt Creek	Australia	Record daily precipitation	50.8 mm (2.0 in)	25 of 100 (Routine)
Mohawk	United States	Record daily precipitation	44.5 mm (1.8 in)	25 of 100 (Routine)
Lock Haven	United States	Record high maximum temperature	12.8 C (55.0 F)	25 of 100 (Routine)
Rupert 3 WSW	United States	Record daily snowfall	10.2 cm (4.0 in)	24 of 100 (Routine)
Wyanga (Barcoo)	Australia	Record daily precipitation	28.4 mm (1.1 in)	23 of 100 (Routine)
Norwalk Wwtp	United States	Record daily snowfall	12.7 cm (5.0 in)	23 of 100 (Routine)
Aberfoyle	Australia	Record daily precipitation	34.3 mm (1.4 in)	22 of 100 (Routine)
Coldwater	Canada	Record high minimum temperature	1.7 C (35.1 F)	22 of 100 (Routine)
Braunschweig (T.H.)	Germany	Record daily precipitation	26.3 mm (1.0 in)	21 of 100 (Routine)
Vytegra	Russia	Record low minimum temperature	-41.6 C (-42.9 F)	21 of 100 (Routine)
Clifton	United States	Record daily precipitation	33.8 mm (1.3 in)	21 of 100 (Routine)
Silverton	United States	Record high minimum temperature	-3.9 C (25.0 F)	21 of 100 (Routine)
Chama	United States	Record high minimum temperature	-3.3 C (26.1 F)	21 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record daily precipitation	12.0 mm (0.5 in)	20 of 100 (Routine)
Jena Sternwarte	Germany	Record daily precipitation	23.2 mm (0.9 in)	20 of 100 (Routine)
Magdeburg	Germany	Record daily precipitation	16.1 mm (0.6 in)	20 of 100 (Routine)
Garsebach Bei Meissen	Germany	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Chemnitz	Germany	Record daily precipitation	24.3 mm (1.0 in)	20 of 100 (Routine)
Bad Lauchstadt	Germany	Record daily precipitation	13.1 mm (0.5 in)	20 of 100 (Routine)
Doberlug-Kirchhain	Germany	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Casa Grande	United States	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Shearleys Tank	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Halle	Germany	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Wittenberg	Germany	Record daily precipitation	23.8 mm (0.9 in)	20 of 100 (Routine)
Chicoutimi	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Tucson WFO	United States	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Euabalong (Lachlan St)	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Cobar (Tindarey)	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Kazalinsk	Kazakhstan	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Durham	United Kingdom	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Walgett Council Depot	Australia	Record daily precipitation	0.5 mm (0.02 in)	20 of 100 (Routine)
Batlow Post Office	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

397 records

Records set or tied on 30 December 1940 by type: Highest daily maximum 24, Lowest daily maximum 6, Highest daily minimum 190, Lowest daily minimum 9, Heaviest daily rainfall 141, Heaviest daily snowfall 22, Deepest snow cover 5.

Records on 30 December 1940 by type
Record type	Records
Highest daily maximum	24
Lowest daily maximum	6
Highest daily minimum	190
Lowest daily minimum	9
Heaviest daily rainfall	141
Heaviest daily snowfall	22
Deepest snow cover	5

Records on 30 December 1940 by timescale: all-time 0, monthly 15, daily 382.

How Much Records Were Beaten By

312 broken records

Margins by which the 312 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 230.0. Ties are not counted.

Top 20 by Significance

30 December 1940

Top 20 records on 30 December 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1940	Brocken, DE	monthly rain	88.4 mm (3.5 in)	35.6 mm (1.4 in)	24 years	61 of 100 (Major)
30 December 1940	Grayling, US	daily snowfall	33.0 cm (13.0 in)	20.3 cm (8.0 in)	44 years	58 of 100 (Notable)
30 December 1940	Altastenberg, DE	daily rain	42.8 mm (1.7 in)	19.2 mm (0.8 in)	44 years	54 of 100 (Notable)
30 December 1940	Woodstock, CA	daily rain	27.9 mm (1.1 in)	27.4 mm (1.1 in)	52 years	52 of 100 (Notable)
30 December 1940	Payson Rs, US	daily rain	48.5 mm (1.9 in)	39.1 mm (1.5 in)	22 years	50 of 100 (Notable)
30 December 1940	Zerbst, DE	monthly rain	25.5 mm (1.0 in)	6.5 mm (0.26 in)	40 years	48 of 100 (Notable)
30 December 1940	Brindley Park 2, AU	daily rain	55.9 mm (2.2 in)	46.5 mm (1.8 in)	19 years	43 of 100 (Notable)
30 December 1940	Artern, DE	monthly rain	25.7 mm (1.0 in)	4.7 mm (0.19 in)	40 years	43 of 100 (Notable)
30 December 1940	Cap Chat, CA	daily snowfall	31.0 cm (12.2 in)	18.3 cm (7.2 in)	11 years	42 of 100 (Notable)
30 December 1940	Edgeley 3WNW, US	daily snow depth	10.2 cm (4.0 in)	7.7 cm (3.0 in)	38 years	42 of 100 (Notable)
30 December 1940	Cap Chat, CA	daily rain	31.0 mm (1.2 in)	18.3 mm (0.7 in)	11 years	41 of 100 (Notable)
30 December 1940	Higgins Lake, US	monthly rain	33.0 mm (1.3 in)	7.6 mm (0.30 in)	31 years	39 of 100 (Notable)
30 December 1940	Granite Reef Dam, US	daily rain	43.2 mm (1.7 in)	29.0 mm (1.1 in)	25 years	38 of 100 (Notable)
30 December 1940	Roosevelt 1 S, US	daily rain	59.4 mm (2.3 in)	36.3 mm (1.4 in)	6 years	36 of 100 (Notable)
30 December 1940	Premer Post Office, AU	daily rain	40.6 mm (1.6 in)	21.0 mm (0.8 in)	52 years	35 of 100 (Notable)
30 December 1940	Bad Muskau, DE	monthly rain	33.7 mm (1.3 in)	6.4 mm (0.25 in)	1 year	34 of 100 (Routine)
30 December 1940	Maricopa 9 SSW, US	daily rain	30.5 mm (1.2 in)	24.1 mm (0.9 in)	15 years	34 of 100 (Routine)
30 December 1940	Adelong Post Office, AU	daily rain	38.9 mm (1.5 in)	12.7 mm (0.5 in)	49 years	32 of 100 (Routine)
30 December 1940	Storlien, SE	monthly low min	-35.4 C (-31.7 F)	1.4 C (2.5 F)	55 years	32 of 100 (Routine)
30 December 1940	Wanaaring Post Office, AU	daily rain	41.9 mm (1.6 in)	29.2 mm (1.1 in)	15 years	30 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 1940

Records set or tied on this calendar date in each year from 1799 to 1940. 1940 had 397 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 1940-12-30: 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 50	303
50 to 100	5
100 to 150	0
150 to 200	1
200 to 250	3