Weather Records on 18 April 1981

708 weather records were set or tied worldwide on 18 April 1981. Highest significance: Progresso, US.

Key Facts for 18 April 1981

On 18 April 1981, 708 weather records were set or tied at long-record stations worldwide.
289 were record highs and 174 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 16 monthly and 692 daily.
Progresso set a monthly record daily precipitation of 36.6 mm (1.4 in) on 18 April 1981.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 466 records.

Record Map

708 stations

708 station records on 18 April 1981 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1981: highest significance records shown on the map
Station	Country	Type	Value	Significance
Progresso	United States	Record daily precipitation	36.6 mm (1.4 in)	69 of 100 (Major)
Hill City 1 W	United States	Record daily precipitation	33.5 mm (1.3 in)	62 of 100 (Major)
Langtry	United States	Record daily precipitation	109.7 mm (4.3 in)	58 of 100 (Notable)
Bairro Alto	Brazil	Record daily precipitation	100.3 mm (3.9 in)	50 of 100 (Notable)
Remanso	Brazil	Record daily precipitation	54.0 mm (2.1 in)	49 of 100 (Notable)
Casa Grande	Brazil	Record daily precipitation	95.2 mm (3.7 in)	48 of 100 (Notable)
Campestre	Brazil	Record daily precipitation	59.2 mm (2.3 in)	48 of 100 (Notable)
Pandale 1 N	United States	Record daily precipitation	63.5 mm (2.5 in)	48 of 100 (Notable)
Pioche	United States	Record daily precipitation	30.5 mm (1.2 in)	43 of 100 (Notable)
Columbus	United States	Record daily precipitation	70.6 mm (2.8 in)	42 of 100 (Notable)
Correntes	Brazil	Record daily precipitation	51.6 mm (2.0 in)	41 of 100 (Notable)
Magdeburg	Germany	Record low minimum temperature	-3.5 C (25.7 F)	40 of 100 (Notable)
Hvar	Croatia	Record low maximum temperature	11.0 C (51.8 F)	40 of 100 (Notable)
Bennetts Brg	United States	Record daily precipitation	38.9 mm (1.5 in)	40 of 100 (Notable)
Stillwater Rsvr	United States	Record daily precipitation	26.7 mm (1.1 in)	39 of 100 (Notable)
Hallettsville 2 N	United States	Record daily precipitation	66.5 mm (2.6 in)	38 of 100 (Notable)
Novosibirsk	Russia	Record daily precipitation	26.9 mm (1.1 in)	36 of 100 (Notable)
Walden	United States	Record high maximum temperature	21.7 C (71.1 F)	36 of 100 (Notable)
Lyons Falls	United States	Record daily precipitation	32.8 mm (1.3 in)	36 of 100 (Notable)
Uman	Ukraine	Record low minimum temperature	-6.2 C (20.8 F)	35 of 100 (Notable)
Jeremiah 1 S	United States	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Vasilevici	Belarus	Record low minimum temperature	-3.8 C (25.2 F)	34 of 100 (Routine)
Steamboat Springs	United States	Record high maximum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Lovelock	United States	Record high minimum temperature	12.8 C (55.0 F)	34 of 100 (Routine)
Hot Springs 2	United States	Record daily precipitation	25.1 mm (1.0 in)	34 of 100 (Routine)
Johnstown	United States	Record high minimum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Panuco (Smn)	Mexico	Record low maximum temperature	15.6 C (60.1 F)	33 of 100 (Routine)
Mina	United States	Record high minimum temperature	11.7 C (53.1 F)	33 of 100 (Routine)
Alice	United States	Record daily precipitation	44.2 mm (1.7 in)	32 of 100 (Routine)
Nis	Serbia	Record daily precipitation	33.2 mm (1.3 in)	31 of 100 (Routine)
Highmarket 2W	United States	Record daily precipitation	38.9 mm (1.5 in)	31 of 100 (Routine)
La Pryor	United States	Record daily precipitation	36.3 mm (1.4 in)	31 of 100 (Routine)
Galdinopolis	Brazil	Record daily precipitation	82.2 mm (3.2 in)	30 of 100 (Routine)
Kjusjur	Russia	Record high minimum temperature	-0.6 C (30.9 F)	30 of 100 (Routine)
Richfield	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
La Plata 1 W	United States	Record high minimum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Lahontan Dam	United States	Record high minimum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Boonville 4 SSW	United States	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Aiken 5SE	United States	Record high maximum temperature	32.8 C (91.0 F)	30 of 100 (Routine)
Junction 4SSW	United States	Record daily precipitation	53.3 mm (2.1 in)	29 of 100 (Routine)
Catucaba	Brazil	Record daily precipitation	31.9 mm (1.3 in)	28 of 100 (Routine)
Bom Conselho	Brazil	Record daily precipitation	73.3 mm (2.9 in)	28 of 100 (Routine)
Tonichi	Mexico	Record high minimum temperature	25.6 C (78.1 F)	28 of 100 (Routine)
Steelville 2 N	United States	Record daily precipitation	47.8 mm (1.9 in)	28 of 100 (Routine)
Buffalo 2 SSW	United States	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Brady	United States	Record daily precipitation	34.8 mm (1.4 in)	28 of 100 (Routine)
Turkey	United States	Record daily precipitation	29.2 mm (1.1 in)	28 of 100 (Routine)
Racine Wwtp	United States	Record high maximum temperature	27.8 C (82.0 F)	28 of 100 (Routine)
Watertown AP	United States	Record daily precipitation	26.7 mm (1.1 in)	28 of 100 (Routine)
Perth Regional Office	Australia	Record high minimum temperature	19.6 C (67.3 F)	27 of 100 (Routine)
Barreiras	Brazil	Record daily precipitation	54.1 mm (2.1 in)	27 of 100 (Routine)
Feira de Santana	Brazil	Record daily precipitation	36.0 mm (1.4 in)	27 of 100 (Routine)
Mazapa	Mexico	Record high minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Szczecin	Poland	Record low minimum temperature	-6.0 C (21.2 F)	27 of 100 (Routine)
Ohotsk	Russia	Record high maximum temperature	7.7 C (45.9 F)	27 of 100 (Routine)
Ft Valley	United States	Record high minimum temperature	4.4 C (39.9 F)	27 of 100 (Routine)
Del Norte 3ENE	United States	Record high minimum temperature	3.3 C (37.9 F)	27 of 100 (Routine)
Falls Village	United States	Record high minimum temperature	12.8 C (55.0 F)	27 of 100 (Routine)
Beaverhead R/S	United States	Record high minimum temperature	6.7 C (44.1 F)	27 of 100 (Routine)
Romney 1 SW	United States	Record high minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)

Counts by Type and Timescale

708 records

Records set or tied on 18 April 1981 by type: Highest daily maximum 95, Lowest daily maximum 42, Highest daily minimum 194, Lowest daily minimum 132, Heaviest daily rainfall 243, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 18 April 1981 by type
Record type	Records
Highest daily maximum	95
Lowest daily maximum	42
Highest daily minimum	194
Lowest daily minimum	132
Heaviest daily rainfall	243
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 18 April 1981 by timescale: all-time 0, monthly 16, daily 692.

How Much Records Were Beaten By

563 broken records

Margins by which the 563 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 63.7. Ties are not counted.

Top 20 by Significance

18 April 1981

Top 20 records on 18 April 1981 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1981	Progresso, US	monthly rain	36.6 mm (1.4 in)	17.5 mm (0.7 in)	47 years	69 of 100 (Major)
18 April 1981	Hill City 1 W, US	daily rain	33.5 mm (1.3 in)	25.1 mm (1.0 in)	55 years	62 of 100 (Major)
18 April 1981	Langtry, US	monthly rain	109.7 mm (4.3 in)	63.7 mm (2.5 in)	0 years	58 of 100 (Notable)
18 April 1981	Bairro Alto, BR	monthly rain	100.3 mm (3.9 in)	24.5 mm (1.0 in)	24 years	50 of 100 (Notable)
18 April 1981	Remanso, BR	daily rain	54.0 mm (2.1 in)	38.9 mm (1.5 in)	64 years	49 of 100 (Notable)
18 April 1981	Casa Grande, BR	daily rain	95.2 mm (3.7 in)	54.9 mm (2.2 in)	36 years	48 of 100 (Notable)
18 April 1981	Campestre, BR	daily rain	59.2 mm (2.3 in)	47.1 mm (1.9 in)	31 years	48 of 100 (Notable)
18 April 1981	Pandale 1 N, US	daily rain	63.5 mm (2.5 in)	56.4 mm (2.2 in)	15 years	48 of 100 (Notable)
18 April 1981	Pioche, US	daily rain	30.5 mm (1.2 in)	20.1 mm (0.8 in)	8 years	43 of 100 (Notable)
18 April 1981	Columbus, US	daily rain	70.6 mm (2.8 in)	35.8 mm (1.4 in)	12 years	42 of 100 (Notable)
18 April 1981	Correntes, BR	daily rain	51.6 mm (2.0 in)	34.0 mm (1.3 in)	16 years	41 of 100 (Notable)
18 April 1981	Magdeburg, DE	daily low min	-3.5 C (25.7 F)	0.5 C (0.9 F)	96 years	40 of 100 (Notable)
18 April 1981	Hvar, HR	daily low max	11.0 C (51.8 F)	1.9 C (3.4 F)	78 years	40 of 100 (Notable)
18 April 1981	Bennetts Brg, US	daily rain	38.9 mm (1.5 in)	23.4 mm (0.9 in)	18 years	40 of 100 (Notable)
18 April 1981	Stillwater Rsvr, US	daily rain	26.7 mm (1.1 in)	12.7 mm (0.5 in)	52 years	39 of 100 (Notable)
18 April 1981	Hallettsville 2 N, US	daily rain	66.5 mm (2.6 in)	9.6 mm (0.38 in)	87 years	38 of 100 (Notable)
18 April 1981	Novosibirsk, RU	monthly rain	26.9 mm (1.1 in)	2.9 mm (0.11 in)	33 years	36 of 100 (Notable)
18 April 1981	Walden, US	daily high max	21.7 C (71.1 F)	1.7 C (3.1 F)	83 years	36 of 100 (Notable)
18 April 1981	Lyons Falls, US	daily rain	32.8 mm (1.3 in)	16.3 mm (0.6 in)	42 years	36 of 100 (Notable)
18 April 1981	Uman, UA	daily low min	-6.2 C (20.8 F)	0.6 C (1.1 F)	85 years	35 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 1981

Records set or tied on this calendar date in each year from 1793 to 1981. 1981 had 708 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 1981-04-18: 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 2026-10-16 (16 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).

Margin	Records
0 to 10	494
10 to 20	42
20 to 30	18
30 to 40	5
40 to 50	1
50 to 60	2
60 to 70	1