Weather Records on 21 December 1975

548 weather records were set or tied worldwide on 21 December 1975. Highest significance: Pentland Post Office, AU.

Key Facts for 21 December 1975

On 21 December 1975, 548 weather records were set or tied at long-record stations worldwide.
76 were record highs and 106 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 19 monthly and 528 daily.
Pentland Post Office set a daily record precipitation of 119.4 mm (4.7 in) on 21 December 1975.
Across 158 earlier years (1793 to 2025) the same calendar date averaged 489 records.

Record Map

548 stations

548 station records on 21 December 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 December 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pentland Post Office	Australia	Record daily precipitation	119.4 mm (4.7 in)	65 of 100 (Major)
Fernlees Post Office	Australia	Record daily precipitation	216.0 mm (8.5 in)	64 of 100 (Major)
Ljungdalen	Sweden	Record daily precipitation	31.8 mm (1.3 in)	62 of 100 (Major)
Westgrove	Australia	Record daily precipitation	71.0 mm (2.8 in)	61 of 100 (Major)
St Lawrence Post Office	Australia	Record daily precipitation	143.0 mm (5.6 in)	60 of 100 (Major)
Orion	Australia	Record daily precipitation	84.0 mm (3.3 in)	58 of 100 (Notable)
Lethebrook	Australia	Record daily precipitation	138.6 mm (5.5 in)	56 of 100 (Notable)
Bruksvallarna	Sweden	Record daily precipitation	44.4 mm (1.7 in)	56 of 100 (Notable)
Bulken	Norway	Record daily precipitation	69.2 mm (2.7 in)	55 of 100 (Notable)
Peakvale Station	Australia	Record daily precipitation	94.0 mm (3.7 in)	53 of 100 (Notable)
Meruoca	Brazil	Record daily precipitation	87.2 mm (3.4 in)	52 of 100 (Notable)
Willowvale	Australia	Record daily precipitation	65.0 mm (2.6 in)	51 of 100 (Notable)
Tylden "Tulden"	South Africa	Record daily precipitation	50.0 mm (2.0 in)	51 of 100 (Notable)
Mazelspoort Dam	South Africa	Record daily precipitation	43.5 mm (1.7 in)	51 of 100 (Notable)
Roros	Norway	Record daily precipitation	26.0 mm (1.0 in)	49 of 100 (Notable)
Bradford Cntrl Fs	United States	Record daily snowfall	25.4 cm (10.0 in)	49 of 100 (Notable)
Rolleston	Australia	Record daily precipitation	91.0 mm (3.6 in)	48 of 100 (Notable)
Tonteldoos	South Africa	Record daily precipitation	99.0 mm (3.9 in)	46 of 100 (Notable)
Merlin Station	Australia	Record daily precipitation	71.4 mm (2.8 in)	45 of 100 (Notable)
Boatman Station	Australia	Record daily precipitation	45.6 mm (1.8 in)	45 of 100 (Notable)
Agterkop	South Africa	Record daily precipitation	29.0 mm (1.1 in)	45 of 100 (Notable)
Sacaton	United States	Record daily precipitation	38.6 mm (1.5 in)	45 of 100 (Notable)
Pleystowe Sugar Mill	Australia	Record daily precipitation	134.0 mm (5.3 in)	44 of 100 (Notable)
Yarmouth A	Canada	Record daily snowfall	21.3 cm (8.4 in)	44 of 100 (Notable)
Ulcanbah	Australia	Record daily precipitation	80.0 mm (3.1 in)	43 of 100 (Notable)
Maryland	Australia	Record daily precipitation	49.6 mm (2.0 in)	43 of 100 (Notable)
Lismore (Centre Street)	Australia	Record daily precipitation	69.6 mm (2.7 in)	42 of 100 (Notable)
Einasleigh Township	Australia	Record daily precipitation	87.4 mm (3.4 in)	41 of 100 (Notable)
Mirtna	Australia	Record daily precipitation	90.0 mm (3.5 in)	41 of 100 (Notable)
Lawrence	United States	Record snow depth	20.3 cm (8.0 in)	41 of 100 (Notable)
Kuttabul Post Office	Australia	Record daily precipitation	130.0 mm (5.1 in)	39 of 100 (Notable)
Club Crocodile Resort	Australia	Record daily precipitation	161.0 mm (6.3 in)	39 of 100 (Notable)
Nimbin Post Office	Australia	Record daily precipitation	72.8 mm (2.9 in)	39 of 100 (Notable)
Kon-Kolodez	Russia	Record low minimum temperature	-28.7 C (-19.7 F)	39 of 100 (Notable)
Cambooya Post Office	Australia	Record daily precipitation	58.6 mm (2.3 in)	38 of 100 (Notable)
Planet Downs	Australia	Record daily precipitation	100.0 mm (3.9 in)	37 of 100 (Notable)
Marnhull	Australia	Record daily precipitation	37.6 mm (1.5 in)	37 of 100 (Notable)
Dohne	South Africa	Record daily precipitation	40.0 mm (1.6 in)	37 of 100 (Notable)
Jamestown	South Africa	Record daily precipitation	27.0 mm (1.1 in)	37 of 100 (Notable)
Fitchburg 4 SE	United States	Record daily snowfall	20.1 cm (7.9 in)	37 of 100 (Notable)
Heath	United States	Record daily snowfall	24.1 cm (9.5 in)	37 of 100 (Notable)
Frecheirinha	Brazil	Record daily precipitation	72.8 mm (2.9 in)	36 of 100 (Notable)
Ecum Secum	Canada	Record daily snowfall	25.4 cm (10.0 in)	36 of 100 (Notable)
Zametchino	Russia	Record low minimum temperature	-30.2 C (-22.4 F)	36 of 100 (Notable)
W Otis	United States	Record daily snowfall	16.0 cm (6.3 in)	36 of 100 (Notable)
Fruitland	United States	Record daily snowfall	10.2 cm (4.0 in)	36 of 100 (Notable)
Woorarra	Australia	Record daily precipitation	64.0 mm (2.5 in)	35 of 100 (Notable)
Langmorn	Australia	Record daily precipitation	86.0 mm (3.4 in)	35 of 100 (Notable)
Old Koreelah (McPherson)	Australia	Record daily precipitation	55.0 mm (2.2 in)	35 of 100 (Notable)
Port Hastings	Canada	Record daily precipitation	35.1 mm (1.4 in)	35 of 100 (Notable)
Milray Station Wrc	Australia	Record daily precipitation	129.2 mm (5.1 in)	34 of 100 (Routine)
Malmagen	Sweden	Record daily precipitation	27.7 mm (1.1 in)	34 of 100 (Routine)
Nogales	United States	Record high minimum temperature	8.9 C (48.0 F)	34 of 100 (Routine)
Westfield	United States	Record daily snowfall	20.3 cm (8.0 in)	34 of 100 (Routine)
Nashua 2 NNW	United States	Record daily snowfall	30.5 cm (12.0 in)	34 of 100 (Routine)
Lyons Falls	United States	Record daily snowfall	24.9 cm (9.8 in)	34 of 100 (Routine)
La Ringo	Australia	Record daily precipitation	90.0 mm (3.5 in)	33 of 100 (Routine)
Lansdowne Station	Australia	Record daily precipitation	41.0 mm (1.6 in)	33 of 100 (Routine)
Cooyar Post Office	Australia	Record daily precipitation	52.6 mm (2.1 in)	33 of 100 (Routine)
West Haldon	Australia	Record daily precipitation	39.6 mm (1.6 in)	33 of 100 (Routine)

Counts by Type and Timescale

548 records

Records set or tied on 21 December 1975 by type: Highest daily maximum 36, Lowest daily maximum 62, Highest daily minimum 40, Lowest daily minimum 44, Heaviest daily rainfall 268, Heaviest daily snowfall 85, Deepest snow cover 13.

Records on 21 December 1975 by type
Record type	Records
Highest daily maximum	36
Lowest daily maximum	62
Highest daily minimum	40
Lowest daily minimum	44
Heaviest daily rainfall	268
Heaviest daily snowfall	85
Deepest snow cover	13

Records on 21 December 1975 by timescale: all-time 1, monthly 19, daily 528.

How Much Records Were Beaten By

470 broken records

Margins by which the 470 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

21 December 1975

Top 20 records on 21 December 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 December 1975	Pentland Post Office, AU	daily rain	119.4 mm (4.7 in)	71.4 mm (2.8 in)	65 years	65 of 100 (Major)
21 December 1975	Fernlees Post Office, AU	all-time rain	216.0 mm (8.5 in)	37.7 mm (1.5 in)	57 years	64 of 100 (Major)
21 December 1975	Ljungdalen, SE	monthly rain	31.8 mm (1.3 in)	13.0 mm (0.5 in)	30 years	62 of 100 (Major)
21 December 1975	Westgrove, AU	daily rain	71.0 mm (2.8 in)	43.8 mm (1.7 in)	68 years	61 of 100 (Major)
21 December 1975	St Lawrence Post Office, AU	daily rain	143.0 mm (5.6 in)	84.3 mm (3.3 in)	52 years	60 of 100 (Major)
21 December 1975	Orion, AU	daily rain	84.0 mm (3.3 in)	51.5 mm (2.0 in)	73 years	58 of 100 (Notable)
21 December 1975	Lethebrook, AU	daily rain	138.6 mm (5.5 in)	89.3 mm (3.5 in)	52 years	56 of 100 (Notable)
21 December 1975	Bruksvallarna, SE	monthly rain	44.4 mm (1.7 in)	25.3 mm (1.0 in)	11 years	56 of 100 (Notable)
21 December 1975	Bulken, NO	daily rain	69.2 mm (2.7 in)	30.8 mm (1.2 in)	62 years	55 of 100 (Notable)
21 December 1975	Peakvale Station, AU	daily rain	94.0 mm (3.7 in)	68.6 mm (2.7 in)	34 years	53 of 100 (Notable)
21 December 1975	Meruoca, BR	daily rain	87.2 mm (3.4 in)	57.1 mm (2.2 in)	26 years	52 of 100 (Notable)
21 December 1975	Willowvale, AU	daily rain	65.0 mm (2.6 in)	39.6 mm (1.6 in)	48 years	51 of 100 (Notable)
21 December 1975	Tylden "Tulden", ZA	daily rain	50.0 mm (2.0 in)	27.1 mm (1.1 in)	66 years	51 of 100 (Notable)
21 December 1975	Mazelspoort Dam, ZA	daily rain	43.5 mm (1.7 in)	25.0 mm (1.0 in)	53 years	51 of 100 (Notable)
21 December 1975	Roros, NO	monthly rain	26.0 mm (1.0 in)	2.6 mm (0.10 in)	70 years	49 of 100 (Notable)
21 December 1975	Bradford Cntrl Fs, US	daily snowfall	25.4 cm (10.0 in)	15.2 cm (6.0 in)	14 years	49 of 100 (Notable)
21 December 1975	Rolleston, AU	daily rain	91.0 mm (3.6 in)	27.5 mm (1.1 in)	76 years	48 of 100 (Notable)
21 December 1975	Tonteldoos, ZA	daily rain	99.0 mm (3.9 in)	45.5 mm (1.8 in)	20 years	46 of 100 (Notable)
21 December 1975	Merlin Station, AU	daily rain	71.4 mm (2.8 in)	32.0 mm (1.3 in)	60 years	45 of 100 (Notable)
21 December 1975	Boatman Station, AU	daily rain	45.6 mm (1.8 in)	39.0 mm (1.5 in)	36 years	45 of 100 (Notable)

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 1975

Records set or tied on this calendar date in each year from 1793 to 1975. 1975 had 548 records.

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

Records on 12-21 in each year
Year	Records
1793	1
1794	1
1799	1
1801	2
1808	3
1825	1
1828	1
1839	1
1846	1
1850	1
1855	7
1859	1
1860	1
1868	1
1870	1
1871	2
1874	2
1875	3
1876	1
1877	1
1878	1
1879	1
1880	1
1884	1
1886	3
1889	1
1890	4
1893	4
1894	1
1895	5
1896	3
1897	3
1898	1
1900	8
1901	15
1902	5
1903	25
1904	3
1905	15
1906	15
1907	17
1908	19
1909	20
1910	29
1911	36
1912	23
1913	11
1914	107
1915	43
1916	40
1917	18
1918	41
1919	57
1920	30
1921	104
1922	34
1923	323
1924	377
1925	120
1926	178
1927	147
1928	70
1929	156
1930	66
1931	556
1932	150
1933	581
1934	230
1935	398
1936	323
1937	189
1938	145
1939	140
1940	622
1941	651
1942	968
1943	148
1944	762
1945	396
1946	495
1947	700
1948	297
1949	1,281
1950	504
1951	1,061
1952	197
1953	256
1954	444
1955	888
1956	672
1957	846
1958	516
1959	272
1960	585
1961	254
1962	563
1963	1,137
1964	613
1965	247
1966	400
1967	1,923
1968	818
1969	828
1970	547
1971	680
1972	651
1973	1,292
1974	374
1975	548
1976	446
1977	470
1978	517
1979	558
1980	726
1981	1,476
1982	702
1983	3,324
1984	1,012
1985	979
1986	404
1987	775
1988	717
1989	3,203
1990	2,701
1991	1,125
1992	751
1993	967
1994	793
1995	878
1996	1,114
1997	810
1998	1,142
1999	851
2000	944
2001	650
2002	579
2003	1,103
2004	675
2005	606
2006	1,443
2007	946
2008	1,062
2009	1,097
2010	2,039
2011	653
2012	759
2013	1,029
2014	878
2015	1,173
2016	543
2017	459
2018	742
2019	755
2020	965
2021	323
2022	528
2023	1,170
2024	778
2025	1,099

Download the Data

Data for records on 1975-12-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 50	412
50 to 100	37
100 to 150	13
150 to 200	7
200 to 250	1