Weather Records on 30 December 1977

795 weather records were set or tied worldwide on 30 December 1977. Highest significance: Villiers (Pol), ZA.

Key Facts for 30 December 1977

On 30 December 1977, 795 weather records were set or tied at long-record stations worldwide.
139 were record highs and 32 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 39 monthly and 749 daily.
Villiers (Pol) set an all-time record daily precipitation of 224.5 mm (8.8 in) on 30 December 1977.
Across 154 earlier years (1799 to 2025) the same calendar date averaged 494 records.

Record Map

795 stations

795 station records on 30 December 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 December 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Villiers (Pol)	South Africa	Record daily precipitation	224.5 mm (8.8 in)	80 of 100 (Exceptional)
Botanic Gardens - Pmb	South Africa	Record daily precipitation	122.9 mm (4.8 in)	73 of 100 (Major)
Durban-Botanical Gardens	South Africa	Record daily precipitation	108.5 mm (4.3 in)	73 of 100 (Major)
Fort Cunynghame (Bos)	South Africa	Record daily precipitation	84.0 mm (3.3 in)	70 of 100 (Major)
Cwebe	South Africa	Record daily precipitation	179.0 mm (7.0 in)	70 of 100 (Major)
Ritzville 1 SSE	United States	Record daily snowfall	15.0 cm (5.9 in)	68 of 100 (Major)
Bayview Model Basin	United States	Record daily snowfall	50.8 cm (20.0 in)	67 of 100 (Major)
Kieskamahoek (Pol)	South Africa	Record daily precipitation	76.5 mm (3.0 in)	65 of 100 (Major)
Dumure	South Africa	Record daily precipitation	60.0 mm (2.4 in)	62 of 100 (Major)
Kologha (Bos)	South Africa	Record daily precipitation	100.0 mm (3.9 in)	61 of 100 (Major)
Zoetendals Vallei	South Africa	Record daily precipitation	65.0 mm (2.6 in)	60 of 100 (Major)
Rockford	South Africa	Record daily precipitation	108.5 mm (4.3 in)	60 of 100 (Major)
Cathcart	South Africa	Record daily precipitation	79.0 mm (3.1 in)	59 of 100 (Notable)
Trout Lake	United States	Record daily snowfall	58.4 cm (23.0 in)	59 of 100 (Notable)
Caledon (Pol)	South Africa	Record daily precipitation	56.0 mm (2.2 in)	58 of 100 (Notable)
Hopewell	South Africa	Record daily precipitation	87.0 mm (3.4 in)	58 of 100 (Notable)
Oranjeville (Skl)	South Africa	Record daily precipitation	130.0 mm (5.1 in)	58 of 100 (Notable)
Plevna	United States	Record daily snowfall	17.8 cm (7.0 in)	58 of 100 (Notable)
Clifton	South Africa	Record daily precipitation	67.5 mm (2.7 in)	57 of 100 (Notable)
Buxton (Bos)	South Africa	Record daily precipitation	78.0 mm (3.1 in)	57 of 100 (Notable)
Eston	South Africa	Record daily precipitation	53.5 mm (2.1 in)	57 of 100 (Notable)
Cwencwe (Bos)	South Africa	Record daily precipitation	89.0 mm (3.5 in)	56 of 100 (Notable)
Thomas River (Sar)	South Africa	Record daily precipitation	51.0 mm (2.0 in)	56 of 100 (Notable)
Dohne (Sar)	South Africa	Record daily precipitation	93.0 mm (3.7 in)	55 of 100 (Notable)
Turffontein	South Africa	Record daily precipitation	107.5 mm (4.2 in)	55 of 100 (Notable)
Albertvale	South Africa	Record daily precipitation	49.5 mm (1.9 in)	54 of 100 (Notable)
Durban-Cowie Rd. Nursery	South Africa	Record daily precipitation	94.7 mm (3.7 in)	54 of 100 (Notable)
Doornhoek	South Africa	Record daily precipitation	78.0 mm (3.1 in)	54 of 100 (Notable)
Port Alfred	South Africa	Record daily precipitation	45.0 mm (1.8 in)	53 of 100 (Notable)
Dohne	South Africa	Record daily precipitation	100.8 mm (4.0 in)	53 of 100 (Notable)
Little Harmony, Rich	South Africa	Record daily precipitation	85.1 mm (3.4 in)	53 of 100 (Notable)
Reitz 36	South Africa	Record daily precipitation	77.5 mm (3.1 in)	53 of 100 (Notable)
Davenport	United States	Record daily snowfall	26.7 cm (10.5 in)	53 of 100 (Notable)
Hofmeyer (Mun)	South Africa	Record daily precipitation	40.4 mm (1.6 in)	52 of 100 (Notable)
Grahamstown	South Africa	Record daily precipitation	64.0 mm (2.5 in)	51 of 100 (Notable)
Mbulu (Bos)	South Africa	Record daily precipitation	52.5 mm (2.1 in)	51 of 100 (Notable)
Alexandria (Pol)	South Africa	Record daily precipitation	60.0 mm (2.4 in)	50 of 100 (Notable)
Silverdales	South Africa	Record daily precipitation	68.0 mm (2.7 in)	50 of 100 (Notable)
Cradock	South Africa	Record daily precipitation	46.0 mm (1.8 in)	50 of 100 (Notable)
Huxley	South Africa	Record daily precipitation	95.2 mm (3.7 in)	50 of 100 (Notable)
Baynesfield Estate	South Africa	Record daily precipitation	51.5 mm (2.0 in)	50 of 100 (Notable)
Twyfelspoort	South Africa	Record daily precipitation	95.0 mm (3.7 in)	50 of 100 (Notable)
Forsyth 6 NNW	United States	Record daily precipitation	53.3 mm (2.1 in)	50 of 100 (Notable)
Emblem	United States	Record daily snowfall	12.7 cm (5.0 in)	50 of 100 (Notable)
Willowvale (Tnk)	South Africa	Record daily precipitation	95.0 mm (3.7 in)	49 of 100 (Notable)
Nieuwejaarsfontein	South Africa	Record daily precipitation	57.5 mm (2.3 in)	49 of 100 (Notable)
Brady Aznoe	United States	Record daily snowfall	12.7 cm (5.0 in)	49 of 100 (Notable)
Dunkirk 19NNE	United States	Record daily snowfall	15.2 cm (6.0 in)	49 of 100 (Notable)
Catarina	Brazil	Record daily precipitation	160.0 mm (6.3 in)	48 of 100 (Notable)
Bredasdorp	South Africa	Record daily precipitation	43.5 mm (1.7 in)	48 of 100 (Notable)
Umzonia (Rsv)	South Africa	Record daily precipitation	60.2 mm (2.4 in)	48 of 100 (Notable)
Sawoti	South Africa	Record daily precipitation	152.0 mm (6.0 in)	48 of 100 (Notable)
Windy Hill No.2	South Africa	Record daily precipitation	73.5 mm (2.9 in)	48 of 100 (Notable)
Goldbutte 7 N	United States	Record daily snowfall	12.7 cm (5.0 in)	48 of 100 (Notable)
Leliekloof	South Africa	Record daily precipitation	37.5 mm (1.5 in)	47 of 100 (Notable)
Rietfontein	South Africa	Record daily precipitation	92.5 mm (3.6 in)	47 of 100 (Notable)
Lenoir	United States	Record daily snowfall	6.4 cm (2.5 in)	47 of 100 (Notable)
Alicedale	South Africa	Record daily precipitation	48.2 mm (1.9 in)	46 of 100 (Notable)
Glen Roy	South Africa	Record daily precipitation	43.5 mm (1.7 in)	46 of 100 (Notable)
Kentani (Bos)	South Africa	Record daily precipitation	79.0 mm (3.1 in)	46 of 100 (Notable)

Counts by Type and Timescale

795 records

Records set or tied on 30 December 1977 by type: Highest daily maximum 39, Lowest daily maximum 12, Highest daily minimum 100, Lowest daily minimum 20, Heaviest daily rainfall 494, Heaviest daily snowfall 102, Deepest snow cover 28.

Records on 30 December 1977 by type
Record type	Records
Highest daily maximum	39
Lowest daily maximum	12
Highest daily minimum	100
Lowest daily minimum	20
Heaviest daily rainfall	494
Heaviest daily snowfall	102
Deepest snow cover	28

Records on 30 December 1977 by timescale: all-time 7, monthly 39, daily 749.

How Much Records Were Beaten By

696 broken records

Margins by which the 696 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 305.0. Ties are not counted.

Top 20 by Significance

30 December 1977

Top 20 records on 30 December 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 December 1977	Villiers (Pol), ZA	all-time rain	224.5 mm (8.8 in)	53.0 mm (2.1 in)	43 years	80 of 100 (Exceptional)
30 December 1977	Botanic Gardens - Pmb, ZA	monthly rain	122.9 mm (4.8 in)	43.7 mm (1.7 in)	56 years	73 of 100 (Major)
30 December 1977	Durban-Botanical Gardens, ZA	daily rain	108.5 mm (4.3 in)	69.6 mm (2.7 in)	77 years	73 of 100 (Major)
30 December 1977	Fort Cunynghame (Bos), ZA	monthly rain	84.0 mm (3.3 in)	29.4 mm (1.2 in)	69 years	70 of 100 (Major)
30 December 1977	Cwebe, ZA	monthly rain	179.0 mm (7.0 in)	61.9 mm (2.4 in)	44 years	70 of 100 (Major)
30 December 1977	Ritzville 1 SSE, US	daily snowfall	15.0 cm (5.9 in)	11.2 cm (4.4 in)	71 years	68 of 100 (Major)
30 December 1977	Bayview Model Basin, US	all-time snowfall	50.8 cm (20.0 in)	22.9 cm (9.0 in)	16 years	67 of 100 (Major)
30 December 1977	Kieskamahoek (Pol), ZA	daily rain	76.5 mm (3.0 in)	43.5 mm (1.7 in)	80 years	65 of 100 (Major)
30 December 1977	Dumure, ZA	monthly rain	60.0 mm (2.4 in)	31.5 mm (1.2 in)	24 years	62 of 100 (Major)
30 December 1977	Kologha (Bos), ZA	daily rain	100.0 mm (3.9 in)	56.8 mm (2.2 in)	40 years	61 of 100 (Major)
30 December 1977	Zoetendals Vallei, ZA	daily rain	65.0 mm (2.6 in)	38.1 mm (1.5 in)	48 years	60 of 100 (Major)
30 December 1977	Rockford, ZA	daily rain	108.5 mm (4.3 in)	68.6 mm (2.7 in)	47 years	60 of 100 (Major)
30 December 1977	Cathcart, ZA	daily rain	79.0 mm (3.1 in)	40.4 mm (1.6 in)	60 years	59 of 100 (Notable)
30 December 1977	Trout Lake, US	daily snowfall	58.4 cm (23.0 in)	30.5 cm (12.0 in)	54 years	59 of 100 (Notable)
30 December 1977	Caledon (Pol), ZA	daily rain	56.0 mm (2.2 in)	32.1 mm (1.3 in)	46 years	58 of 100 (Notable)
30 December 1977	Hopewell, ZA	daily rain	87.0 mm (3.4 in)	48.1 mm (1.9 in)	40 years	58 of 100 (Notable)
30 December 1977	Oranjeville (Skl), ZA	all-time rain	130.0 mm (5.1 in)	30.9 mm (1.2 in)	32 years	58 of 100 (Notable)
30 December 1977	Plevna, US	daily snowfall	17.8 cm (7.0 in)	12.5 cm (4.9 in)	59 years	58 of 100 (Notable)
30 December 1977	Clifton, ZA	daily rain	67.5 mm (2.7 in)	45.9 mm (1.8 in)	48 years	57 of 100 (Notable)
30 December 1977	Buxton (Bos), ZA	daily rain	78.0 mm (3.1 in)	42.7 mm (1.7 in)	44 years	57 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

1799 to 1977

Records set or tied on this calendar date in each year from 1799 to 1977. 1977 had 795 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 1977-12-30: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 50	636
50 to 100	39
100 to 150	13
150 to 200	4
200 to 250	3
250 to 300	0
300 to 350	1