Weather Records on 18 March 1943

603 weather records were set or tied worldwide on 18 March 1943. Highest significance: Williston Sloulin Fld, US.

Key Facts for 18 March 1943

On 18 March 1943, 603 weather records were set or tied at long-record stations worldwide.
47 were record highs and 330 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 596 daily.
Williston Sloulin Fld set a daily record snow depth of 33.0 cm (13.0 in) on 18 March 1943.
Across 160 earlier years (1806 to 2026) the same calendar date averaged 476 records.

Record Map

603 stations

603 station records on 18 March 1943 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 March 1943: highest significance records shown on the map
Station	Country	Type	Value	Significance
Williston Sloulin Fld	United States	Record snow depth	33.0 cm (13.0 in)	47 of 100 (Notable)
Springville Tule Hd	United States	Record daily precipitation	104.4 mm (4.1 in)	46 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record daily precipitation	37.1 mm (1.5 in)	40 of 100 (Notable)
Newman	United States	Record daily precipitation	28.2 mm (1.1 in)	40 of 100 (Notable)
Porthill	United States	Record low minimum temperature	-18.3 C (-0.9 F)	39 of 100 (Notable)
Chariton 1 E	United States	Record daily snowfall	12.7 cm (5.0 in)	39 of 100 (Notable)
Britton	United States	Record snow depth	45.7 cm (18.0 in)	39 of 100 (Notable)
Auburn	United States	Record daily precipitation	86.9 mm (3.4 in)	38 of 100 (Notable)
Alliance 1WNW	United States	Record daily snowfall	15.2 cm (6.0 in)	37 of 100 (Notable)
Butte Bert Mooney AP	United States	Record low minimum temperature	-31.7 C (-25.1 F)	37 of 100 (Notable)
Kaslo	Canada	Record low minimum temperature	-13.3 C (8.1 F)	36 of 100 (Notable)
Collbran	United States	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
Dickinson Exp STN	United States	Record snow depth	20.3 cm (8.0 in)	36 of 100 (Notable)
Manhattan	United States	Record snow depth	10.2 cm (4.0 in)	35 of 100 (Notable)
Coffs Harbour	Australia	Record daily precipitation	135.1 mm (5.3 in)	34 of 100 (Routine)
Hankey (Pol)	South Africa	Record daily precipitation	34.3 mm (1.4 in)	34 of 100 (Routine)
Polson	United States	Record low minimum temperature	-16.1 C (3.0 F)	34 of 100 (Routine)
Fortine 1 N	United States	Record low minimum temperature	-26.7 C (-16.1 F)	32 of 100 (Routine)
Waukee	United States	Record daily snowfall	16.5 cm (6.5 in)	31 of 100 (Routine)
Bottineau	United States	Record snow depth	25.4 cm (10.0 in)	30 of 100 (Routine)
Golden A	Canada	Record low minimum temperature	-22.8 C (-9.0 F)	29 of 100 (Routine)
Kimball 2NE	United States	Record snow depth	10.2 cm (4.0 in)	29 of 100 (Routine)
Augusta	United States	Record low minimum temperature	-27.8 C (-18.0 F)	28 of 100 (Routine)
Bozeman Montana State UNIV	United States	Record low minimum temperature	-24.4 C (-11.9 F)	28 of 100 (Routine)
Libby 1 NE Rs	United States	Record low minimum temperature	-20.0 C (-4.0 F)	28 of 100 (Routine)
Mottinger	United States	Record low minimum temperature	-7.2 C (19.0 F)	28 of 100 (Routine)
Dunderlandsdalen	Norway	Record snow depth	230.0 cm (90.6 in)	27 of 100 (Routine)
Tarnaby	Sweden	Record snow depth	176.0 cm (69.3 in)	27 of 100 (Routine)
Ft Deposit	United States	Record daily precipitation	75.2 mm (3.0 in)	27 of 100 (Routine)
Holyoke	United States	Record daily snowfall	5.1 cm (2.0 in)	27 of 100 (Routine)
Meeker	United States	Record daily snowfall	13.2 cm (5.2 in)	27 of 100 (Routine)
Alton 1 W	United States	Record daily snowfall	7.6 cm (3.0 in)	27 of 100 (Routine)
Jeanerette 5 NW	United States	Record daily precipitation	46.2 mm (1.8 in)	27 of 100 (Routine)
Heron 2 NW	United States	Record low minimum temperature	-21.7 C (-7.1 F)	27 of 100 (Routine)
Purdum	United States	Record daily snowfall	12.7 cm (5.0 in)	27 of 100 (Routine)
Milan Exp STN	United States	Record daily precipitation	52.1 mm (2.1 in)	27 of 100 (Routine)
Cascade	United States	Record daily snowfall	43.2 cm (17.0 in)	26 of 100 (Routine)
Ft Collins	United States	Record daily snowfall	16.5 cm (6.5 in)	26 of 100 (Routine)
Lamoni	United States	Record daily snowfall	10.2 cm (4.0 in)	26 of 100 (Routine)
Emmett	United States	Record daily snowfall	13.2 cm (5.2 in)	26 of 100 (Routine)
Big Timber	United States	Record low minimum temperature	-28.9 C (-20.0 F)	26 of 100 (Routine)
Canyon Ferry	United States	Record low minimum temperature	-25.0 C (-13.0 F)	26 of 100 (Routine)
Ekalaka	United States	Record low minimum temperature	-25.0 C (-13.0 F)	26 of 100 (Routine)
Kahuku 912	United States	Record daily precipitation	38.6 mm (1.5 in)	26 of 100 (Routine)
Portland Rfc City	United States	Record low minimum temperature	-0.6 C (30.9 F)	26 of 100 (Routine)
Armstrong	Canada	Record low minimum temperature	-13.9 C (7.0 F)	25 of 100 (Routine)
Glacier	Canada	Record low minimum temperature	-18.9 C (-2.0 F)	25 of 100 (Routine)
Gunnison 3SW	United States	Record daily snowfall	14.0 cm (5.5 in)	25 of 100 (Routine)
Hawkinsville	United States	Record daily precipitation	64.8 mm (2.6 in)	25 of 100 (Routine)
Wallace	United States	Record low minimum temperature	-16.1 C (3.0 F)	25 of 100 (Routine)
Manhattan	United States	Record daily snowfall	10.7 cm (4.2 in)	25 of 100 (Routine)
Huntley Exp STN	United States	Record low minimum temperature	-26.1 C (-15.0 F)	25 of 100 (Routine)
Livingston	United States	Record low minimum temperature	-26.1 C (-15.0 F)	25 of 100 (Routine)
Trinidad 2 SSE	United States	Record low minimum temperature	-6.1 C (21.0 F)	25 of 100 (Routine)
Havre Wb City	United States	Record low minimum temperature	-24.4 C (-11.9 F)	25 of 100 (Routine)
Creston	Canada	Record low maximum temperature	-2.2 C (28.0 F)	24 of 100 (Routine)
Cascade	United States	Record daily precipitation	39.4 mm (1.6 in)	24 of 100 (Routine)
Glenwood Spgs #2	United States	Record daily snowfall	18.3 cm (7.2 in)	24 of 100 (Routine)
Montezuma 2 NW	United States	Record daily precipitation	55.4 mm (2.2 in)	24 of 100 (Routine)
Talbotton	United States	Record daily precipitation	27.9 mm (1.1 in)	24 of 100 (Routine)

Counts by Type and Timescale

603 records

Records set or tied on 18 March 1943 by type: Highest daily maximum 26, Lowest daily maximum 156, Highest daily minimum 21, Lowest daily minimum 174, Heaviest daily rainfall 140, Heaviest daily snowfall 59, Deepest snow cover 27.

Records on 18 March 1943 by type
Record type	Records
Highest daily maximum	26
Lowest daily maximum	156
Highest daily minimum	21
Lowest daily minimum	174
Heaviest daily rainfall	140
Heaviest daily snowfall	59
Deepest snow cover	27

Records on 18 March 1943 by timescale: all-time 0, monthly 7, daily 596.

How Much Records Were Beaten By

497 broken records

Margins by which the 497 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 490.0. Ties are not counted.

Top 20 by Significance

18 March 1943

Top 20 records on 18 March 1943 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 March 1943	Williston Sloulin Fld, US	daily snow depth	33.0 cm (13.0 in)	33.0 cm (13.0 in)	32 years	47 of 100 (Notable)
18 March 1943	Springville Tule Hd, US	daily rain	104.4 mm (4.1 in)	55.9 mm (2.2 in)	24 years	46 of 100 (Notable)
18 March 1943	Guayama 1SW, PR	daily rain	37.1 mm (1.5 in)	28.2 mm (1.1 in)	13 years	40 of 100 (Notable)
18 March 1943	Newman, US	daily rain	28.2 mm (1.1 in)	20.6 mm (0.8 in)	29 years	40 of 100 (Notable)
18 March 1943	Porthill, US	daily low min	-18.3 C (-0.9 F)	9.4 C (16.9 F)	41 years	39 of 100 (Notable)
18 March 1943	Chariton 1 E, US	daily snowfall	12.7 cm (5.0 in)	8.9 cm (3.5 in)	46 years	39 of 100 (Notable)
18 March 1943	Britton, US	daily snow depth	45.7 cm (18.0 in)	43.2 cm (17.0 in)	20 years	39 of 100 (Notable)
18 March 1943	Auburn, US	daily rain	86.9 mm (3.4 in)	63.0 mm (2.5 in)	9 years	38 of 100 (Notable)
18 March 1943	Alliance 1WNW, US	daily snowfall	15.2 cm (6.0 in)	12.7 cm (5.0 in)	12 years	37 of 100 (Notable)
18 March 1943	Butte Bert Mooney AP, US	daily low min	-31.7 C (-25.1 F)	13.4 C (24.1 F)	36 years	37 of 100 (Notable)
18 March 1943	Kaslo, CA	daily low min	-13.3 C (8.1 F)	8.3 C (14.9 F)	29 years	36 of 100 (Notable)
18 March 1943	Collbran, US	daily rain	25.4 mm (1.0 in)	14.0 mm (0.6 in)	12 years	36 of 100 (Notable)
18 March 1943	Dickinson Exp STN, US	daily snow depth	20.3 cm (8.0 in)	12.7 cm (5.0 in)	36 years	36 of 100 (Notable)
18 March 1943	Manhattan, US	monthly snow depth	10.2 cm (4.0 in)	5.1 cm (2.0 in)	50 years	35 of 100 (Notable)
18 March 1943	Coffs Harbour, AU	daily rain	135.1 mm (5.3 in)	79.5 mm (3.1 in)	13 years	34 of 100 (Routine)
18 March 1943	Hankey (Pol), ZA	daily rain	34.3 mm (1.4 in)	27.9 mm (1.1 in)	10 years	34 of 100 (Routine)
18 March 1943	Polson, US	daily low min	-16.1 C (3.0 F)	9.4 C (16.9 F)	33 years	34 of 100 (Routine)
18 March 1943	Fortine 1 N, US	daily low min	-26.7 C (-16.1 F)	11.7 C (21.1 F)	29 years	32 of 100 (Routine)
18 March 1943	Waukee, US	daily snowfall	16.5 cm (6.5 in)	6.3 cm (2.5 in)	36 years	31 of 100 (Routine)
18 March 1943	Bottineau, US	monthly snow depth	25.4 cm (10.0 in)	7.6 cm (3.0 in)	2 years	30 of 100 (Routine)

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

1806 to 1943

Records set or tied on this calendar date in each year from 1806 to 1943. 1943 had 603 records.

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

Records on 03-18 in each year
Year	Records
1806	1
1807	1
1808	1
1810	1
1814	1
1831	1
1836	1
1839	1
1845	1
1849	1
1850	5
1853	2
1859	1
1863	1
1865	2
1867	1
1868	3
1876	1
1881	1
1882	3
1884	3
1885	1
1887	1
1888	4
1890	3
1891	3
1892	2
1893	1
1894	1
1895	2
1896	10
1897	14
1898	5
1899	8
1900	14
1901	2
1902	9
1903	22
1904	9
1905	19
1906	13
1907	11
1908	8
1909	9
1910	12
1911	17
1912	16
1913	24
1914	32
1915	30
1916	73
1917	45
1918	32
1919	25
1920	39
1921	66
1922	39
1923	262
1924	96
1925	145
1926	251
1927	376
1928	301
1929	106
1930	261
1931	167
1932	212
1933	244
1934	375
1935	87
1936	699
1937	296
1938	304
1939	750
1940	444
1941	954
1942	382
1943	603
1944	321
1945	751
1946	492
1947	328
1948	296
1949	292
1950	1,042
1951	582
1952	474
1953	218
1954	355
1955	469
1956	363
1957	374
1958	347
1959	392
1960	585
1961	579
1962	284
1963	665
1964	348
1965	1,584
1966	540
1967	1,396
1968	915
1969	601
1970	533
1971	405
1972	1,028
1973	716
1974	694
1975	614
1976	538
1977	684
1978	1,003
1979	894
1980	588
1981	570
1982	1,284
1983	1,225
1984	446
1985	731
1986	626
1987	933
1988	1,001
1989	1,147
1990	1,478
1991	706
1992	789
1993	1,683
1994	960
1995	833
1996	518
1997	1,024
1998	1,144
1999	1,051
2000	524
2001	841
2002	1,562
2003	1,425
2004	1,232
2005	1,178
2006	551
2007	1,330
2008	1,066
2009	776
2010	678
2011	993
2012	3,348
2013	783
2014	701
2015	943
2016	675
2017	1,183
2018	921
2019	666
2020	672
2021	562
2022	476
2023	890
2024	843
2025	728
2026	2,870

Download the Data

Data for records on 1943-03-18: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 100	484
100 to 200	9
200 to 300	1
300 to 400	1
400 to 500	2