Weather Records on 21 March 2018

809 weather records were set or tied worldwide on 21 March 2018. Highest significance: New Park, US.

Key Facts for 21 March 2018

On 21 March 2018, 809 weather records were set or tied at long-record stations worldwide.
139 were record highs and 245 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 7 monthly and 801 daily.
New Park set a daily record snow depth of 30.5 cm (12.0 in) on 21 March 2018.
Across 157 earlier years (1797 to 2026) the same calendar date averaged 481 records.

Record Map

809 stations

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

Weather records on 21 March 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
New Park	United States	Record snow depth	30.5 cm (12.0 in)	69 of 100 (Major)
Joplin	United States	Record snow depth	61.0 cm (24.0 in)	67 of 100 (Major)
Dover	United States	Record daily snowfall	12.7 cm (5.0 in)	63 of 100 (Major)
Islip-Li Macarthur AP	United States	Record daily snowfall	37.8 cm (14.9 in)	60 of 100 (Major)
Sonnette 7 SW	United States	Record snow depth	38.1 cm (15.0 in)	59 of 100 (Notable)
Lakeview	United States	Record daily snowfall	11.4 cm (4.5 in)	57 of 100 (Notable)
Ashland	United States	Record snow depth	10.2 cm (4.0 in)	57 of 100 (Notable)
Allentown Lehigh Vly Intl AP	United States	Record daily snowfall	33.5 cm (13.2 in)	56 of 100 (Notable)
Downieville	United States	Record daily precipitation	89.9 mm (3.5 in)	55 of 100 (Notable)
Lancaster 2 NE Filt Plt	United States	Record snow depth	30.5 cm (12.0 in)	54 of 100 (Notable)
Alderson	United States	Record daily snowfall	16.5 cm (6.5 in)	54 of 100 (Notable)
Jfk Intl AP	United States	Record daily snowfall	21.3 cm (8.4 in)	54 of 100 (Notable)
Staunton Wtp	United States	Record daily snowfall	23.9 cm (9.4 in)	53 of 100 (Notable)
Alderson	United States	Record snow depth	17.8 cm (7.0 in)	53 of 100 (Notable)
Reading Wb City	United States	Record daily snowfall	26.2 cm (10.3 in)	53 of 100 (Notable)
Paso Robles Muni AP	United States	Record daily precipitation	49.5 mm (1.9 in)	53 of 100 (Notable)
Murotomisaki	Japan	Record daily precipitation	103.9 mm (4.1 in)	52 of 100 (Notable)
Brookville	United States	Record daily snowfall	6.4 cm (2.5 in)	52 of 100 (Notable)
Lancaster 2 NE Filt Plt	United States	Record daily snowfall	22.9 cm (9.0 in)	52 of 100 (Notable)
Covington Fltr Plt	United States	Record daily snowfall	15.2 cm (6.0 in)	52 of 100 (Notable)
Greensburg	United States	Record daily snowfall	15.2 cm (6.0 in)	51 of 100 (Notable)
Hagerstown 1E	United States	Record snow depth	22.9 cm (9.0 in)	51 of 100 (Notable)
Hot Springs	United States	Record daily snowfall	17.8 cm (7.0 in)	51 of 100 (Notable)
Nome AP	United States	Record daily snowfall	15.0 cm (5.9 in)	51 of 100 (Notable)
Kota Kinabalu Intl	Malaysia	Record daily precipitation	65.5 mm (2.6 in)	50 of 100 (Notable)
Colgate Powerhouse	United States	Record daily precipitation	73.7 mm (2.9 in)	50 of 100 (Notable)
Dover	United States	Record snow depth	12.7 cm (5.0 in)	50 of 100 (Notable)
Lewisburg 3 N	United States	Record daily snowfall	14.7 cm (5.8 in)	50 of 100 (Notable)
Louisville Intl AP	United States	Record snow depth	15.0 cm (5.9 in)	50 of 100 (Notable)
Spring Grove	United States	Record daily snowfall	20.3 cm (8.0 in)	49 of 100 (Notable)
Sakai	Japan	Record daily precipitation	53.1 mm (2.1 in)	48 of 100 (Notable)
Jalapa Ver.	Mexico	Record daily precipitation	48.3 mm (1.9 in)	48 of 100 (Notable)
Santa Barbara	United States	Record daily precipitation	51.1 mm (2.0 in)	48 of 100 (Notable)
Bucyrus	United States	Record snow depth	17.8 cm (7.0 in)	48 of 100 (Notable)
Covington Fltr Plt	United States	Record snow depth	15.2 cm (6.0 in)	48 of 100 (Notable)
Piqua	United States	Record daily snowfall	12.7 cm (5.0 in)	47 of 100 (Notable)
Makaweli 965	United States	Record low maximum temperature	21.7 C (71.1 F)	47 of 100 (Notable)
Hodgenville Lincoln P	United States	Record daily precipitation	76.2 mm (3.0 in)	46 of 100 (Notable)
Royal Oak 2 SSW	United States	Record snow depth	12.7 cm (5.0 in)	46 of 100 (Notable)
Belltower	United States	Record snow depth	30.5 cm (12.0 in)	46 of 100 (Notable)
Van Wert 1 S	United States	Record snow depth	10.2 cm (4.0 in)	46 of 100 (Notable)
Bear Gap	United States	Record daily snowfall	27.9 cm (11.0 in)	46 of 100 (Notable)
Allardt	United States	Record daily snowfall	11.9 cm (4.7 in)	46 of 100 (Notable)
Mill Gap	United States	Record snow depth	22.9 cm (9.0 in)	46 of 100 (Notable)
Camarillo AP	United States	Record daily precipitation	42.7 mm (1.7 in)	46 of 100 (Notable)
Pt Mugu Nf	United States	Record daily precipitation	46.7 mm (1.8 in)	46 of 100 (Notable)
Pittsburgh ASOS	United States	Record daily snowfall	22.1 cm (8.7 in)	46 of 100 (Notable)
Berne Wwtp	United States	Record daily snowfall	8.1 cm (3.2 in)	45 of 100 (Notable)
Lebanon 2 W	United States	Record snow depth	25.4 cm (10.0 in)	45 of 100 (Notable)
Montgomery L&D	United States	Record daily snowfall	11.7 cm (4.6 in)	45 of 100 (Notable)
Rocky Mt	United States	Record daily snowfall	6.4 cm (2.5 in)	45 of 100 (Notable)
White Sulphur Springs	United States	Record daily snowfall	17.8 cm (7.0 in)	45 of 100 (Notable)
Strawberry Valley 2	United States	Record daily precipitation	124.5 mm (4.9 in)	44 of 100 (Notable)
Woodstock 2 NE	United States	Record low maximum temperature	-0.6 C (30.9 F)	44 of 100 (Notable)
Atlantic City Intl AP	United States	Record daily snowfall	14.5 cm (5.7 in)	44 of 100 (Notable)
Saco 1 NNW	United States	Record snow depth	38.1 cm (15.0 in)	43 of 100 (Notable)
Chambersburg 1 ESE	United States	Record low maximum temperature	-0.6 C (30.9 F)	43 of 100 (Notable)
Octoraro Lake	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Free Union	United States	Record snow depth	15.2 cm (6.0 in)	43 of 100 (Notable)
New Castle	United States	Record daily snowfall	16.5 cm (6.5 in)	43 of 100 (Notable)

Counts by Type and Timescale

809 records

Records set or tied on 21 March 2018 by type: Highest daily maximum 71, Lowest daily maximum 109, Highest daily minimum 68, Lowest daily minimum 136, Heaviest daily rainfall 146, Heaviest daily snowfall 145, Deepest snow cover 134.

Records on 21 March 2018 by type
Record type	Records
Highest daily maximum	71
Lowest daily maximum	109
Highest daily minimum	68
Lowest daily minimum	136
Heaviest daily rainfall	146
Heaviest daily snowfall	145
Deepest snow cover	134

Records on 21 March 2018 by timescale: all-time 1, monthly 7, daily 801.

How Much Records Were Beaten By

690 broken records

Margins by which the 690 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 635.0. Ties are not counted.

Top 20 by Significance

21 March 2018

Top 20 records on 21 March 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 March 2018	New Park, US	daily snow depth	30.5 cm (12.0 in)	30.5 cm (12.0 in)	68 years	69 of 100 (Major)
21 March 2018	Joplin, US	daily snow depth	61.0 cm (24.0 in)	43.2 cm (17.0 in)	65 years	67 of 100 (Major)
21 March 2018	Dover, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	121 years	63 of 100 (Major)
21 March 2018	Islip-Li Macarthur AP, US	daily snowfall	37.8 cm (14.9 in)	32.7 cm (12.9 in)	51 years	60 of 100 (Major)
21 March 2018	Sonnette 7 SW, US	daily snow depth	38.1 cm (15.0 in)	33.0 cm (13.0 in)	48 years	59 of 100 (Notable)
21 March 2018	Lakeview, US	daily snowfall	11.4 cm (4.5 in)	9.4 cm (3.7 in)	60 years	57 of 100 (Notable)
21 March 2018	Ashland, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	101 years	57 of 100 (Notable)
21 March 2018	Allentown Lehigh Vly Intl AP, US	daily snowfall	33.5 cm (13.2 in)	22.6 cm (8.9 in)	53 years	56 of 100 (Notable)
21 March 2018	Downieville, US	daily rain	89.9 mm (3.5 in)	37.1 mm (1.5 in)	97 years	55 of 100 (Notable)
21 March 2018	Lancaster 2 NE Filt Plt, US	daily snow depth	30.5 cm (12.0 in)	28.0 cm (11.0 in)	24 years	54 of 100 (Notable)
21 March 2018	Alderson, US	daily snowfall	16.5 cm (6.5 in)	13.2 cm (5.2 in)	60 years	54 of 100 (Notable)
21 March 2018	Jfk Intl AP, US	daily snowfall	21.3 cm (8.4 in)	19.3 cm (7.6 in)	24 years	54 of 100 (Notable)
21 March 2018	Staunton Wtp, US	daily snowfall	23.9 cm (9.4 in)	11.2 cm (4.4 in)	108 years	53 of 100 (Notable)
21 March 2018	Alderson, US	daily snow depth	17.8 cm (7.0 in)	17.8 cm (7.0 in)	68 years	53 of 100 (Notable)
21 March 2018	Reading Wb City, US	daily snowfall	26.2 cm (10.3 in)	15.5 cm (6.1 in)	53 years	53 of 100 (Notable)
21 March 2018	Paso Robles Muni AP, US	daily rain	49.5 mm (1.9 in)	33.0 mm (1.3 in)	60 years	53 of 100 (Notable)
21 March 2018	Murotomisaki, JP	daily rain	103.9 mm (4.1 in)	62.4 mm (2.5 in)	29 years	52 of 100 (Notable)
21 March 2018	Brookville, US	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	92 years	52 of 100 (Notable)
21 March 2018	Lancaster 2 NE Filt Plt, US	daily snowfall	22.9 cm (9.0 in)	22.9 cm (9.0 in)	40 years	52 of 100 (Notable)
21 March 2018	Covington Fltr Plt, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	56 years	52 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

1797 to 2018

Records set or tied on this calendar date in each year from 1797 to 2018. 2018 had 809 records.

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

Records on 03-21 in each year
Year	Records
1797	2
1805	1
1806	1
1822	1
1830	1
1836	1
1837	1
1845	1
1846	1
1850	1
1852	2
1857	1
1865	7
1874	1
1877	1
1880	1
1881	1
1883	2
1884	1
1885	5
1886	2
1888	1
1890	3
1892	1
1893	1
1894	1
1895	1
1896	2
1897	2
1898	3
1899	4
1900	4
1901	9
1902	18
1903	23
1904	17
1905	6
1906	3
1907	14
1908	3
1909	11
1910	10
1911	10
1912	36
1913	97
1914	71
1915	27
1916	44
1917	43
1918	43
1919	29
1920	90
1921	96
1922	50
1923	72
1924	96
1925	141
1926	282
1927	179
1928	293
1929	104
1930	99
1931	638
1932	305
1933	235
1934	114
1935	675
1936	225
1937	172
1938	783
1939	280
1940	366
1941	311
1942	330
1943	217
1944	556
1945	294
1946	570
1947	192
1948	948
1949	330
1950	398
1951	779
1952	689
1953	342
1954	211
1955	1,124
1956	686
1957	373
1958	619
1959	230
1960	892
1961	268
1962	548
1963	298
1964	333
1965	1,961
1966	464
1967	487
1968	798
1969	219
1970	612
1971	358
1972	519
1973	385
1974	1,097
1975	751
1976	710
1977	376
1978	838
1979	656
1980	775
1981	676
1982	850
1983	1,673
1984	835
1985	503
1986	1,170
1987	948
1988	1,155
1989	1,396
1990	1,380
1991	1,446
1992	877
1993	687
1994	684
1995	1,141
1996	1,119
1997	1,670
1998	935
1999	1,044
2000	802
2001	1,342
2002	1,593
2003	1,073
2004	1,511
2005	649
2006	1,417
2007	1,220
2008	734
2009	558
2010	1,134
2011	1,451
2012	2,854
2013	727
2014	639
2015	568
2016	553
2017	1,117
2018	809
2019	649
2020	445
2021	489
2022	615
2023	815
2024	432
2025	845
2026	2,615

Download the Data

Data for records on 2018-03-21: 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 2026-10-13 (13 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 100	628
100 to 200	46
200 to 300	10
300 to 400	4
400 to 500	1
500 to 600	0
600 to 700	1