Weather Records on 18 April 2011

1,122 weather records were set or tied worldwide on 18 April 2011. Highest significance: Arthur 4NW, US.

Key Facts for 18 April 2011

On 18 April 2011, 1,122 weather records were set or tied at long-record stations worldwide.
509 were record highs and 240 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 24 monthly and 1,098 daily.
Arthur 4NW set a monthly record daily precipitation of 47.8 mm (1.9 in) on 18 April 2011.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 463 records.

Record Map

1,122 stations

1,122 station records on 18 April 2011 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 2011: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arthur 4NW	United States	Record daily precipitation	47.8 mm (1.9 in)	78 of 100 (Major)
Dar Es Salaam Airpo	Tanzania	Record daily precipitation	172.2 mm (6.8 in)	60 of 100 (Major)
Mellette 4 W	United States	Record snow depth	20.3 cm (8.0 in)	59 of 100 (Notable)
Verkhneuralsk	Russia	Record daily precipitation	26.7 mm (1.1 in)	56 of 100 (Notable)
Metapa de Dominguez	Mexico	Record daily precipitation	101.9 mm (4.0 in)	54 of 100 (Notable)
Delungra Post Office	Australia	Record daily precipitation	35.0 mm (1.4 in)	53 of 100 (Notable)
Aviemore	Australia	Record daily precipitation	52.0 mm (2.0 in)	51 of 100 (Notable)
Clermont Sirius St	Australia	Record low maximum temperature	16.7 C (62.1 F)	50 of 100 (Notable)
Bowbells	United States	Record daily snowfall	7.6 cm (3.0 in)	50 of 100 (Notable)
Watalgan Winfield Rd	Australia	Record daily precipitation	171.0 mm (6.7 in)	49 of 100 (Notable)
Wando Vale Station	Australia	Record daily precipitation	68.3 mm (2.7 in)	48 of 100 (Notable)
Adrian 2 NNE	United States	Record daily snowfall	5.1 cm (2.0 in)	48 of 100 (Notable)
Zanatepec	Mexico	Record daily precipitation	64.8 mm (2.6 in)	47 of 100 (Notable)
Eau Claire 4 NE	United States	Record daily snowfall	5.6 cm (2.2 in)	46 of 100 (Notable)
North French Creek	United States	Record daily precipitation	50.8 mm (2.0 in)	46 of 100 (Notable)
Yamba Pilot Station	Australia	Record daily precipitation	57.8 mm (2.3 in)	45 of 100 (Notable)
Dorsey Basin	United States	Record daily precipitation	68.6 mm (2.7 in)	45 of 100 (Notable)
Newlyn - Cynthia	Australia	Record daily precipitation	39.0 mm (1.5 in)	44 of 100 (Notable)
Holland Wtp	United States	Record daily precipitation	25.4 mm (1.0 in)	44 of 100 (Notable)
Alkali Lake	United States	Record daily precipitation	25.4 mm (1.0 in)	44 of 100 (Notable)
Coldwater St School	United States	Record daily snowfall	6.4 cm (2.5 in)	43 of 100 (Notable)
Detour Village	United States	Record low maximum temperature	0.0 C (32.0 F)	43 of 100 (Notable)
Tower 2S	United States	Record low maximum temperature	0.6 C (33.1 F)	43 of 100 (Notable)
Watford City	United States	Record daily snowfall	8.9 cm (3.5 in)	43 of 100 (Notable)
Darwin Rch	United States	Record daily precipitation	28.4 mm (1.1 in)	43 of 100 (Notable)
Arcturus Downs	Australia	Record daily precipitation	51.0 mm (2.0 in)	42 of 100 (Notable)
Kalpowar Forestry	Australia	Record daily precipitation	61.0 mm (2.4 in)	41 of 100 (Notable)
Cheesman	United States	Record high minimum temperature	10.0 C (50.0 F)	41 of 100 (Notable)
Fessenden	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Stehekin 4 NW	United States	Record low maximum temperature	3.9 C (39.0 F)	41 of 100 (Notable)
Delungra (Pearsby Hall)	Australia	Record daily precipitation	30.0 mm (1.2 in)	40 of 100 (Notable)
Mayville	United States	Record low maximum temperature	1.1 C (34.0 F)	40 of 100 (Notable)
Steele 4N	United States	Record low maximum temperature	-0.6 C (30.9 F)	40 of 100 (Notable)
Croppa Creek (Krui Plains)	Australia	Record daily precipitation	37.4 mm (1.5 in)	39 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record low minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Piedmont Lake	United States	Record daily precipitation	30.2 mm (1.2 in)	39 of 100 (Notable)
Clinton Wwtp	United States	Record daily snowfall	7.6 cm (3.0 in)	39 of 100 (Notable)
Harwood Island (Harwood Sugar	Australia	Record daily precipitation	51.8 mm (2.0 in)	38 of 100 (Notable)
Munising	United States	Record low maximum temperature	-2.2 C (28.0 F)	38 of 100 (Notable)
Hungry Horse Dam	United States	Record daily snowfall	10.2 cm (4.0 in)	38 of 100 (Notable)
Republic	United States	Record low maximum temperature	5.6 C (42.1 F)	38 of 100 (Notable)
Mandan Exp STN	United States	Record daily snowfall	11.4 cm (4.5 in)	37 of 100 (Notable)
Richmond	United States	Record daily precipitation	27.7 mm (1.1 in)	37 of 100 (Notable)
Springsure Comet St	Australia	Record low maximum temperature	17.4 C (63.3 F)	36 of 100 (Notable)
Battle Creek 5NW	United States	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Gaylord	United States	Record low maximum temperature	-1.1 C (30.0 F)	36 of 100 (Notable)
Wisley	United Kingdom	Record high maximum temperature	24.4 C (75.9 F)	35 of 100 (Notable)
Greer	United States	Record high minimum temperature	4.4 C (39.9 F)	35 of 100 (Notable)
Pomona/Fairplex	United States	Record high minimum temperature	13.9 C (57.0 F)	35 of 100 (Notable)
Anakie Richardson St	Australia	Record daily precipitation	32.8 mm (1.3 in)	34 of 100 (Routine)
Comet Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	34 of 100 (Routine)
South West Rocks (Smoky Cape L	Australia	Record daily precipitation	39.6 mm (1.6 in)	34 of 100 (Routine)
Wishek	United States	Record snow depth	25.4 cm (10.0 in)	34 of 100 (Routine)
Lamance Creek	United States	Record daily precipitation	35.6 mm (1.4 in)	34 of 100 (Routine)
Tiree	Australia	Record daily precipitation	38.8 mm (1.5 in)	33 of 100 (Routine)
West Pennant Hills (Cumberland	Australia	Record daily precipitation	61.0 mm (2.4 in)	33 of 100 (Routine)
Simojovel (Dge)	Mexico	Record daily precipitation	40.1 mm (1.6 in)	33 of 100 (Routine)
Presa Colorines (Cfe)	Mexico	Record low maximum temperature	21.7 C (71.1 F)	33 of 100 (Routine)
Ann Arbor U of Mich	United States	Record daily snowfall	6.1 cm (2.4 in)	33 of 100 (Routine)
Watersmeet	United States	Record daily snowfall	7.6 cm (3.0 in)	33 of 100 (Routine)

Counts by Type and Timescale

1,122 records

Records set or tied on 18 April 2011 by type: Highest daily maximum 255, Lowest daily maximum 172, Highest daily minimum 254, Lowest daily minimum 68, Heaviest daily rainfall 231, Heaviest daily snowfall 90, Deepest snow cover 52.

Records on 18 April 2011 by type
Record type	Records
Highest daily maximum	255
Lowest daily maximum	172
Highest daily minimum	254
Lowest daily minimum	68
Heaviest daily rainfall	231
Heaviest daily snowfall	90
Deepest snow cover	52

Records on 18 April 2011 by timescale: all-time 0, monthly 24, daily 1,098.

How Much Records Were Beaten By

870 broken records

Margins by which the 870 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 229.0. Ties are not counted.

Top 20 by Significance

18 April 2011

Top 20 records on 18 April 2011 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 2011	Arthur 4NW, US	monthly rain	47.8 mm (1.9 in)	14.8 mm (0.6 in)	99 years	78 of 100 (Major)
18 April 2011	Dar Es Salaam Airpo, TZ	daily rain	172.2 mm (6.8 in)	138.2 mm (5.4 in)	52 years	60 of 100 (Major)
18 April 2011	Mellette 4 W, US	daily snow depth	20.3 cm (8.0 in)	15.2 cm (6.0 in)	100 years	59 of 100 (Notable)
18 April 2011	Verkhneuralsk, RU	daily rain	26.7 mm (1.1 in)	20.9 mm (0.8 in)	24 years	56 of 100 (Notable)
18 April 2011	Metapa de Dominguez, MX	daily rain	101.9 mm (4.0 in)	64.1 mm (2.5 in)	62 years	54 of 100 (Notable)
18 April 2011	Delungra Post Office, AU	daily rain	35.0 mm (1.4 in)	24.8 mm (1.0 in)	78 years	53 of 100 (Notable)
18 April 2011	Aviemore, AU	daily rain	52.0 mm (2.0 in)	51.5 mm (2.0 in)	32 years	51 of 100 (Notable)
18 April 2011	Clermont Sirius St, AU	daily low max	16.7 C (62.1 F)	9.0 C (16.2 F)	48 years	50 of 100 (Notable)
18 April 2011	Bowbells, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	97 years	50 of 100 (Notable)
18 April 2011	Watalgan Winfield Rd, AU	daily rain	171.0 mm (6.7 in)	151.0 mm (5.9 in)	4 years	49 of 100 (Notable)
18 April 2011	Wando Vale Station, AU	daily rain	68.3 mm (2.7 in)	36.0 mm (1.4 in)	40 years	48 of 100 (Notable)
18 April 2011	Adrian 2 NNE, US	daily snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	109 years	48 of 100 (Notable)
18 April 2011	Zanatepec, MX	daily rain	64.8 mm (2.6 in)	63.5 mm (2.5 in)	16 years	47 of 100 (Notable)
18 April 2011	Eau Claire 4 NE, US	daily snowfall	5.6 cm (2.2 in)	5.6 cm (2.2 in)	84 years	46 of 100 (Notable)
18 April 2011	North French Creek, US	daily rain	50.8 mm (2.0 in)	25.4 mm (1.0 in)	17 years	46 of 100 (Notable)
18 April 2011	Yamba Pilot Station, AU	daily rain	57.8 mm (2.3 in)	12.1 mm (0.5 in)	97 years	45 of 100 (Notable)
18 April 2011	Dorsey Basin, US	daily rain	68.6 mm (2.7 in)	43.2 mm (1.7 in)	6 years	45 of 100 (Notable)
18 April 2011	Newlyn - Cynthia, AU	daily rain	39.0 mm (1.5 in)	32.9 mm (1.3 in)	40 years	44 of 100 (Notable)
18 April 2011	Holland Wtp, US	daily rain	25.4 mm (1.0 in)	6.3 mm (0.25 in)	93 years	44 of 100 (Notable)
18 April 2011	Alkali Lake, US	daily rain	25.4 mm (1.0 in)	18.8 mm (0.7 in)	10 years	44 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 2011

Records set or tied on this calendar date in each year from 1793 to 2011. 2011 had 1,122 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 2011-04-18: 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).

Margin	Records
0 to 50	835
50 to 100	25
100 to 150	5
150 to 200	4
200 to 250	1