Weather Records on 21 April 2018

862 weather records were set or tied worldwide on 21 April 2018. Highest significance: Oconto 4 W, US.

Key Facts for 21 April 2018

On 21 April 2018, 862 weather records were set or tied at long-record stations worldwide.
431 were record highs and 166 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 26 monthly and 836 daily.
Oconto 4 W set a daily record snow depth of 30.5 cm (12.0 in) on 21 April 2018.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

862 stations

862 station records on 21 April 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Oconto 4 W	United States	Record snow depth	30.5 cm (12.0 in)	74 of 100 (Major)
Sturgeon Bay Exp Farm	United States	Record snow depth	30.5 cm (12.0 in)	70 of 100 (Major)
Kewaunee	United States	Record snow depth	17.8 cm (7.0 in)	66 of 100 (Major)
Shawano 2SSW	United States	Record snow depth	27.9 cm (11.0 in)	66 of 100 (Major)
Emmetsburg	United States	Record snow depth	15.2 cm (6.0 in)	63 of 100 (Major)
Winnebago	United States	Record snow depth	12.7 cm (5.0 in)	63 of 100 (Major)
Rainier Paradise Rs	United States	Record daily precipitation	55.9 mm (2.2 in)	60 of 100 (Major)
Vanderbilt 11ENE	United States	Record snow depth	53.3 cm (21.0 in)	57 of 100 (Notable)
Milford 4 NW	United States	Record snow depth	10.2 cm (4.0 in)	53 of 100 (Notable)
Vacoas (Mauritius)	Mauritius	Record daily precipitation	97.0 mm (3.8 in)	52 of 100 (Notable)
Antigo	United States	Record snow depth	22.9 cm (9.0 in)	52 of 100 (Notable)
New London	United States	Record snow depth	35.6 cm (14.0 in)	52 of 100 (Notable)
Waupaca	United States	Record snow depth	30.5 cm (12.0 in)	52 of 100 (Notable)
Spooner Ag Rsch STN	United States	Record snow depth	27.9 cm (11.0 in)	50 of 100 (Notable)
Rosholt	United States	Record snow depth	20.3 cm (8.0 in)	49 of 100 (Notable)
Chengde	China	Record daily precipitation	35.6 mm (1.4 in)	48 of 100 (Notable)
Kremmling	United States	Record daily snowfall	5.6 cm (2.2 in)	47 of 100 (Notable)
Tracy	United States	Record snow depth	35.6 cm (14.0 in)	47 of 100 (Notable)
Spencer 1 N	United States	Record snow depth	15.2 cm (6.0 in)	46 of 100 (Notable)
Akron 4 E	United States	Record daily snowfall	5.1 cm (2.0 in)	44 of 100 (Notable)
Roxboro 7 ESE	United States	Record low minimum temperature	-2.8 C (27.0 F)	44 of 100 (Notable)
Beloit	United States	Record low minimum temperature	-4.4 C (24.1 F)	43 of 100 (Notable)
Newberry-Luce Co Rd Commission	United States	Record snow depth	43.2 cm (17.0 in)	42 of 100 (Notable)
Lake Wilson	United States	Record snow depth	15.2 cm (6.0 in)	42 of 100 (Notable)
Clintonville	United States	Record snow depth	22.9 cm (9.0 in)	42 of 100 (Notable)
Talwood State School	Australia	Record daily precipitation	56.0 mm (2.2 in)	41 of 100 (Notable)
Dover	United States	Record low minimum temperature	-0.6 C (30.9 F)	41 of 100 (Notable)
Northwood	United States	Record low minimum temperature	-8.9 C (16.0 F)	41 of 100 (Notable)
Washington	United States	Record low minimum temperature	-3.9 C (25.0 F)	41 of 100 (Notable)
Mt Sterling	United States	Record low minimum temperature	-2.2 C (28.0 F)	41 of 100 (Notable)
Charlevoix	United States	Record snow depth	38.1 cm (15.0 in)	41 of 100 (Notable)
Appleton	United States	Record low minimum temperature	-4.4 C (24.1 F)	41 of 100 (Notable)
Hardy	United States	Record low minimum temperature	1.7 C (35.1 F)	40 of 100 (Notable)
Spirit Lake	United States	Record low minimum temperature	-3.3 C (26.1 F)	40 of 100 (Notable)
Grand Meadow	United States	Record low minimum temperature	-8.9 C (16.0 F)	40 of 100 (Notable)
Eau Pleine Rsvr	United States	Record snow depth	12.7 cm (5.0 in)	40 of 100 (Notable)
Prairie du Chien	United States	Record low minimum temperature	-4.4 C (24.1 F)	40 of 100 (Notable)
Allison	United States	Record low minimum temperature	-7.2 C (19.0 F)	38 of 100 (Notable)
Albert Lea 3SE	United States	Record low minimum temperature	-5.0 C (23.0 F)	38 of 100 (Notable)
Minneota	United States	Record snow depth	20.3 cm (8.0 in)	38 of 100 (Notable)
Brillion	United States	Record snow depth	20.3 cm (8.0 in)	38 of 100 (Notable)
Mullheim	Germany	Record high maximum temperature	29.3 C (84.7 F)	37 of 100 (Notable)
Liberal	United States	Record daily precipitation	33.0 mm (1.3 in)	37 of 100 (Notable)
Novaja Ladoga	Russia	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Montabaur	Germany	Record high minimum temperature	11.7 C (53.1 F)	34 of 100 (Routine)
Teuschnitz	Germany	Record high minimum temperature	11.9 C (53.4 F)	34 of 100 (Routine)
Izana	Spain	Record low minimum temperature	-5.2 C (22.6 F)	34 of 100 (Routine)
Springhill	United States	Record daily precipitation	53.3 mm (2.1 in)	34 of 100 (Routine)
Manistique Wwtp	United States	Record snow depth	20.3 cm (8.0 in)	34 of 100 (Routine)
Natchez	United States	Record low minimum temperature	3.3 C (37.9 F)	34 of 100 (Routine)
Marion	United States	Record low minimum temperature	-3.9 C (25.0 F)	34 of 100 (Routine)
Wis Rapids Grand Av B	United States	Record snow depth	20.3 cm (8.0 in)	34 of 100 (Routine)
Wamsutter	United States	Record daily snowfall	5.1 cm (2.0 in)	34 of 100 (Routine)
Green Bay	United States	Record snow depth	18.0 cm (7.1 in)	34 of 100 (Routine)
Hill City Muni AP	United States	Record low maximum temperature	8.3 C (46.9 F)	34 of 100 (Routine)
Belle Ile - le Talut	France	Record high minimum temperature	14.1 C (57.4 F)	33 of 100 (Routine)
Geisenheim	Germany	Record high minimum temperature	13.1 C (55.6 F)	33 of 100 (Routine)
Washington Court House	United States	Record low minimum temperature	-5.6 C (21.9 F)	33 of 100 (Routine)
Stratford	United States	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Ridgeland 1NNE	United States	Record snow depth	10.2 cm (4.0 in)	33 of 100 (Routine)

Counts by Type and Timescale

862 records

Records set or tied on 21 April 2018 by type: Highest daily maximum 245, Lowest daily maximum 62, Highest daily minimum 186, Lowest daily minimum 104, Heaviest daily rainfall 122, Heaviest daily snowfall 15, Deepest snow cover 128.

Records on 21 April 2018 by type
Record type	Records
Highest daily maximum	245
Lowest daily maximum	62
Highest daily minimum	186
Lowest daily minimum	104
Heaviest daily rainfall	122
Heaviest daily snowfall	15
Deepest snow cover	128

Records on 21 April 2018 by timescale: all-time 0, monthly 26, daily 836.

How Much Records Were Beaten By

741 broken records

Margins by which the 741 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 331.0. Ties are not counted.

Top 20 by Significance

21 April 2018

Top 20 records on 21 April 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2018	Oconto 4 W, US	daily snow depth	30.5 cm (12.0 in)	28.0 cm (11.0 in)	80 years	74 of 100 (Major)
21 April 2018	Sturgeon Bay Exp Farm, US	daily snow depth	30.5 cm (12.0 in)	20.3 cm (8.0 in)	108 years	70 of 100 (Major)
21 April 2018	Kewaunee, US	daily snow depth	17.8 cm (7.0 in)	15.3 cm (6.0 in)	80 years	66 of 100 (Major)
21 April 2018	Shawano 2SSW, US	daily snow depth	27.9 cm (11.0 in)	17.7 cm (7.0 in)	93 years	66 of 100 (Major)
21 April 2018	Emmetsburg, US	daily snow depth	15.2 cm (6.0 in)	15.2 cm (6.0 in)	69 years	63 of 100 (Major)
21 April 2018	Winnebago, US	daily snow depth	12.7 cm (5.0 in)	12.7 cm (5.0 in)	101 years	63 of 100 (Major)
21 April 2018	Rainier Paradise Rs, US	daily rain	55.9 mm (2.2 in)	25.4 mm (1.0 in)	96 years	60 of 100 (Major)
21 April 2018	Vanderbilt 11ENE, US	daily snow depth	53.3 cm (21.0 in)	33.0 cm (13.0 in)	95 years	57 of 100 (Notable)
21 April 2018	Milford 4 NW, US	daily snow depth	10.2 cm (4.0 in)	7.7 cm (3.0 in)	91 years	53 of 100 (Notable)
21 April 2018	Vacoas (Mauritius), MU	daily rain	97.0 mm (3.8 in)	52.7 mm (2.1 in)	52 years	52 of 100 (Notable)
21 April 2018	Antigo, US	daily snow depth	22.9 cm (9.0 in)	20.4 cm (8.0 in)	52 years	52 of 100 (Notable)
21 April 2018	New London, US	daily snow depth	35.6 cm (14.0 in)	28.0 cm (11.0 in)	7 years	52 of 100 (Notable)
21 April 2018	Waupaca, US	daily snow depth	30.5 cm (12.0 in)	28.0 cm (11.0 in)	7 years	52 of 100 (Notable)
21 April 2018	Spooner Ag Rsch STN, US	daily snow depth	27.9 cm (11.0 in)	15.2 cm (6.0 in)	93 years	50 of 100 (Notable)
21 April 2018	Rosholt, US	daily snow depth	20.3 cm (8.0 in)	20.3 cm (8.0 in)	68 years	49 of 100 (Notable)
21 April 2018	Chengde, CN	daily rain	35.6 mm (1.4 in)	27.6 mm (1.1 in)	9 years	48 of 100 (Notable)
21 April 2018	Kremmling, US	daily snowfall	5.6 cm (2.2 in)	3.1 cm (1.2 in)	108 years	47 of 100 (Notable)
21 April 2018	Tracy, US	daily snow depth	35.6 cm (14.0 in)	33.1 cm (13.0 in)	29 years	47 of 100 (Notable)
21 April 2018	Spencer 1 N, US	daily snow depth	15.2 cm (6.0 in)	15.2 cm (6.0 in)	122 years	46 of 100 (Notable)
21 April 2018	Akron 4 E, US	daily snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	95 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 2018

Records set or tied on this calendar date in each year from 1793 to 2018. 2018 had 862 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 2018-04-21: 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 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 50	657
50 to 100	44
100 to 150	12
150 to 200	13
200 to 250	6
250 to 300	6
300 to 350	3