Weather Records on 18 April 1971

1,106 weather records were set or tied worldwide on 18 April 1971. Highest significance: Merbein Srwsc, AU.

Key Facts for 18 April 1971

On 18 April 1971, 1,106 weather records were set or tied at long-record stations worldwide.
179 were record highs and 154 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 26 monthly and 1,079 daily.
Merbein Srwsc set a monthly record daily precipitation of 68.3 mm (2.7 in) on 18 April 1971.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 463 records.

Record Map

1,106 stations

1,106 station records on 18 April 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Merbein Srwsc	Australia	Record daily precipitation	68.3 mm (2.7 in)	67 of 100 (Major)
Pentland Post Office	Australia	Record daily precipitation	61.5 mm (2.4 in)	63 of 100 (Major)
Gunnawarra	Australia	Record daily precipitation	45.5 mm (1.8 in)	62 of 100 (Major)
Drung Drung	Australia	Record daily precipitation	42.4 mm (1.7 in)	61 of 100 (Major)
Lake Lonsdale	Australia	Record daily precipitation	38.9 mm (1.5 in)	61 of 100 (Major)
Uil	Kazakhstan	Record daily precipitation	40.5 mm (1.6 in)	60 of 100 (Major)
Birchip (Woodlands)	Australia	Record daily precipitation	32.8 mm (1.3 in)	59 of 100 (Notable)
Moncton	Canada	Record daily precipitation	41.7 mm (1.6 in)	57 of 100 (Notable)
Watchem	Australia	Record daily precipitation	46.0 mm (1.8 in)	56 of 100 (Notable)
Hannah 2 N	United States	Record daily precipitation	41.7 mm (1.6 in)	56 of 100 (Notable)
Narraport	Australia	Record daily precipitation	29.7 mm (1.2 in)	55 of 100 (Notable)
Warmur West	Australia	Record daily precipitation	37.1 mm (1.5 in)	55 of 100 (Notable)
Litchfield	Australia	Record daily precipitation	48.5 mm (1.9 in)	54 of 100 (Notable)
Dunbar Station	Australia	Record daily precipitation	114.3 mm (4.5 in)	53 of 100 (Notable)
Birchip (Marlbed)	Australia	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
West Wyalong (Tallimbalong)	Australia	Record daily precipitation	40.6 mm (1.6 in)	52 of 100 (Notable)
Hillston (Hunthawang)	Australia	Record daily precipitation	35.6 mm (1.4 in)	52 of 100 (Notable)
Brakpan	South Africa	Record daily precipitation	195.6 mm (7.7 in)	52 of 100 (Notable)
Corack East	Australia	Record daily precipitation	35.1 mm (1.4 in)	51 of 100 (Notable)
Sheep Hills	Australia	Record daily precipitation	40.6 mm (1.6 in)	51 of 100 (Notable)
Gisborne	Australia	Record daily precipitation	28.7 mm (1.1 in)	51 of 100 (Notable)
Potchefstroom;Braksp	South Africa	Record daily precipitation	83.0 mm (3.3 in)	51 of 100 (Notable)
Ibapah	United States	Record daily precipitation	25.4 mm (1.0 in)	51 of 100 (Notable)
Roodekop	South Africa	Record daily precipitation	37.5 mm (1.5 in)	50 of 100 (Notable)
Mamagalieskraal Suid(Irr)	South Africa	Record daily precipitation	50.0 mm (2.0 in)	50 of 100 (Notable)
Hughenden Post Office	Australia	Record daily precipitation	56.4 mm (2.2 in)	49 of 100 (Notable)
Cape Nelson Lighthouse Compari	Australia	Record daily precipitation	41.4 mm (1.6 in)	49 of 100 (Notable)
Winnipeg Richardson Int'l A	Canada	Record daily precipitation	30.0 mm (1.2 in)	49 of 100 (Notable)
Bowbells	United States	Record daily precipitation	33.0 mm (1.3 in)	49 of 100 (Notable)
Wagga Wagga (Kooringal)	Australia	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Balliang East (Chesney)	Australia	Record daily precipitation	32.0 mm (1.3 in)	48 of 100 (Notable)
Pearshape	Australia	Record daily precipitation	45.7 mm (1.8 in)	48 of 100 (Notable)
Kareepoort (Irr)	South Africa	Record daily precipitation	49.0 mm (1.9 in)	48 of 100 (Notable)
Paragonah	United States	Record daily snowfall	15.2 cm (6.0 in)	48 of 100 (Notable)
Homestead Post Office	Australia	Record daily precipitation	45.5 mm (1.8 in)	47 of 100 (Notable)
Bangerang North	Australia	Record daily precipitation	27.2 mm (1.1 in)	47 of 100 (Notable)
Balliang East	Australia	Record daily precipitation	32.0 mm (1.3 in)	47 of 100 (Notable)
Strathmore	Australia	Record daily precipitation	66.0 mm (2.6 in)	46 of 100 (Notable)
Ivanhoe (Wokabity)	Australia	Record daily precipitation	25.7 mm (1.0 in)	46 of 100 (Notable)
Meilman	Australia	Record daily precipitation	37.6 mm (1.5 in)	46 of 100 (Notable)
Hopetoun	Australia	Record daily precipitation	29.2 mm (1.1 in)	46 of 100 (Notable)
Kolora (Wooriwyrite)	Australia	Record daily precipitation	32.3 mm (1.3 in)	46 of 100 (Notable)
Portage la Prairie	Canada	Record daily precipitation	33.8 mm (1.3 in)	46 of 100 (Notable)
Verwoedburg-Mu"Lytteltn"	South Africa	Record daily precipitation	32.5 mm (1.3 in)	46 of 100 (Notable)
Westhope	United States	Record daily precipitation	28.7 mm (1.1 in)	46 of 100 (Notable)
Eversley	Australia	Record daily precipitation	33.5 mm (1.3 in)	45 of 100 (Notable)
Pilger	Canada	Record daily precipitation	25.4 mm (1.0 in)	45 of 100 (Notable)
Rolla 1NE	United States	Record daily precipitation	27.2 mm (1.1 in)	45 of 100 (Notable)
Mornington Island	Australia	Record daily precipitation	77.5 mm (3.1 in)	44 of 100 (Notable)
Trida (Willandra National Park	Australia	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Durdidwarrah	Australia	Record daily precipitation	34.0 mm (1.3 in)	44 of 100 (Notable)
Klipfontein	South Africa	Record daily precipitation	48.8 mm (1.9 in)	44 of 100 (Notable)
Kameeldrift-Irr	South Africa	Record daily precipitation	40.0 mm (1.6 in)	44 of 100 (Notable)
Chasm Falls	United States	Record snow depth	81.3 cm (32.0 in)	44 of 100 (Notable)
Lake Victoria Storage	Australia	Record daily precipitation	29.5 mm (1.2 in)	43 of 100 (Notable)
Ouyen (Post Office)	Australia	Record daily precipitation	26.2 mm (1.0 in)	43 of 100 (Notable)
Woornack	Australia	Record daily precipitation	25.1 mm (1.0 in)	43 of 100 (Notable)
Wooroonook	Australia	Record daily precipitation	28.4 mm (1.1 in)	43 of 100 (Notable)
Potchefstroom	South Africa	Record daily precipitation	45.5 mm (1.8 in)	43 of 100 (Notable)
Mamogaleskraal	South Africa	Record daily precipitation	47.0 mm (1.9 in)	43 of 100 (Notable)

Counts by Type and Timescale

1,106 records

Records set or tied on 18 April 1971 by type: Highest daily maximum 38, Lowest daily maximum 92, Highest daily minimum 141, Lowest daily minimum 62, Heaviest daily rainfall 737, Heaviest daily snowfall 23, Deepest snow cover 13.

Records on 18 April 1971 by type
Record type	Records
Highest daily maximum	38
Lowest daily maximum	92
Highest daily minimum	141
Lowest daily minimum	62
Heaviest daily rainfall	737
Heaviest daily snowfall	23
Deepest snow cover	13

Records on 18 April 1971 by timescale: all-time 1, monthly 26, daily 1,079.

How Much Records Were Beaten By

996 broken records

Margins by which the 996 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 432.0. Ties are not counted.

Top 20 by Significance

18 April 1971

Top 20 records on 18 April 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1971	Merbein Srwsc, AU	monthly rain	68.3 mm (2.7 in)	34.5 mm (1.4 in)	40 years	67 of 100 (Major)
18 April 1971	Pentland Post Office, AU	daily rain	61.5 mm (2.4 in)	52.1 mm (2.1 in)	76 years	63 of 100 (Major)
18 April 1971	Gunnawarra, AU	daily rain	45.5 mm (1.8 in)	39.9 mm (1.6 in)	46 years	62 of 100 (Major)
18 April 1971	Drung Drung, AU	daily rain	42.4 mm (1.7 in)	27.2 mm (1.1 in)	57 years	61 of 100 (Major)
18 April 1971	Lake Lonsdale, AU	daily rain	38.9 mm (1.5 in)	26.5 mm (1.0 in)	56 years	61 of 100 (Major)
18 April 1971	Uil, KZ	monthly rain	40.5 mm (1.6 in)	14.5 mm (0.6 in)	21 years	60 of 100 (Major)
18 April 1971	Birchip (Woodlands), AU	daily rain	32.8 mm (1.3 in)	22.1 mm (0.9 in)	78 years	59 of 100 (Notable)
18 April 1971	Moncton, CA	daily rain	41.7 mm (1.6 in)	21.9 mm (0.9 in)	71 years	57 of 100 (Notable)
18 April 1971	Watchem, AU	daily rain	46.0 mm (1.8 in)	37.1 mm (1.5 in)	32 years	56 of 100 (Notable)
18 April 1971	Hannah 2 N, US	daily rain	41.7 mm (1.6 in)	28.0 mm (1.1 in)	45 years	56 of 100 (Notable)
18 April 1971	Narraport, AU	daily rain	29.7 mm (1.2 in)	18.3 mm (0.7 in)	78 years	55 of 100 (Notable)
18 April 1971	Warmur West, AU	daily rain	37.1 mm (1.5 in)	26.7 mm (1.1 in)	32 years	55 of 100 (Notable)
18 April 1971	Litchfield, AU	daily rain	48.5 mm (1.9 in)	32.2 mm (1.3 in)	32 years	54 of 100 (Notable)
18 April 1971	Dunbar Station, AU	daily rain	114.3 mm (4.5 in)	106.7 mm (4.2 in)	32 years	53 of 100 (Notable)
18 April 1971	Birchip (Marlbed), AU	daily rain	33.0 mm (1.3 in)	24.4 mm (1.0 in)	56 years	53 of 100 (Notable)
18 April 1971	West Wyalong (Tallimbalong), AU	daily rain	40.6 mm (1.6 in)	16.0 mm (0.6 in)	90 years	52 of 100 (Notable)
18 April 1971	Hillston (Hunthawang), AU	daily rain	35.6 mm (1.4 in)	20.1 mm (0.8 in)	76 years	52 of 100 (Notable)
18 April 1971	Brakpan, ZA	all-time rain	195.6 mm (7.7 in)	40.7 mm (1.6 in)	2 years	52 of 100 (Notable)
18 April 1971	Corack East, AU	daily rain	35.1 mm (1.4 in)	16.6 mm (0.7 in)	66 years	51 of 100 (Notable)
18 April 1971	Sheep Hills, AU	daily rain	40.6 mm (1.6 in)	33.2 mm (1.3 in)	14 years	51 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 1971

Records set or tied on this calendar date in each year from 1793 to 1971. 1971 had 1,106 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1971-04-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Histogram of margins by which records were beaten on 18 April 1971
Margin	Records
0 to 100	983
100 to 200	9
200 to 300	2
300 to 400	1
400 to 500	1