Weather Records on 18 April 1939

525 weather records were set or tied worldwide on 18 April 1939. Highest significance: Dhamtari, IN.

Key Facts for 18 April 1939

On 18 April 1939, 525 weather records were set or tied at long-record stations worldwide.
78 were record highs and 216 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 516 daily.
Dhamtari set a monthly record daily precipitation of 81.3 mm (3.2 in) on 18 April 1939.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 467 records.

Record Map

525 stations

525 station records on 18 April 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dhamtari	India	Record daily precipitation	81.3 mm (3.2 in)	61 of 100 (Major)
Algona	United States	Record snow depth	50.8 cm (20.0 in)	57 of 100 (Notable)
Rockwell City	United States	Record snow depth	50.8 cm (20.0 in)	57 of 100 (Notable)
Webster City	United States	Record snow depth	68.6 cm (27.0 in)	57 of 100 (Notable)
Wondai Post Office	Australia	Record daily precipitation	51.8 mm (2.0 in)	49 of 100 (Notable)
Forest City 2 NNE	United States	Record daily snowfall	10.2 cm (4.0 in)	46 of 100 (Notable)
Ft Dodge 5NNW	United States	Record daily snowfall	12.7 cm (5.0 in)	46 of 100 (Notable)
Sirpur	India	Record daily precipitation	29.5 mm (1.2 in)	44 of 100 (Notable)
Queenton	Australia	Record daily precipitation	51.3 mm (2.0 in)	43 of 100 (Notable)
Tangorin	Australia	Record daily precipitation	63.5 mm (2.5 in)	42 of 100 (Notable)
Grand Meadow	United States	Record daily snowfall	10.2 cm (4.0 in)	42 of 100 (Notable)
Mason City	United States	Record snow depth	25.4 cm (10.0 in)	41 of 100 (Notable)
Markland Dam 39	United States	Record daily precipitation	101.6 mm (4.0 in)	40 of 100 (Notable)
Huntly	Australia	Record daily precipitation	40.1 mm (1.6 in)	39 of 100 (Notable)
Rocky Mt	United States	Record daily precipitation	53.8 mm (2.1 in)	39 of 100 (Notable)
Plymouth-Kingston	United States	Record daily precipitation	58.4 mm (2.3 in)	38 of 100 (Notable)
Lochnagar	Australia	Record daily precipitation	44.2 mm (1.7 in)	37 of 100 (Notable)
Estherville 4E	United States	Record daily snowfall	12.7 cm (5.0 in)	37 of 100 (Notable)
Scotland Neck	United States	Record daily precipitation	40.1 mm (1.6 in)	37 of 100 (Notable)
Alta	United States	Record daily snowfall	12.7 cm (5.0 in)	36 of 100 (Notable)
Taroom Post Office	Australia	Record daily precipitation	41.4 mm (1.6 in)	35 of 100 (Notable)
Dullabcherra	India	Record daily precipitation	146.1 mm (5.8 in)	35 of 100 (Notable)
Kingaroy Prince Street	Australia	Record daily precipitation	43.7 mm (1.7 in)	34 of 100 (Routine)
Murgon Post Office	Australia	Record daily precipitation	51.1 mm (2.0 in)	34 of 100 (Routine)
Sac City	United States	Record daily snowfall	8.9 cm (3.5 in)	34 of 100 (Routine)
Miles Post Office	Australia	Record daily precipitation	43.2 mm (1.7 in)	33 of 100 (Routine)
Yemassee 1 N	United States	Record daily precipitation	47.0 mm (1.9 in)	33 of 100 (Routine)
Eidsvold Post Office	Australia	Record daily precipitation	59.2 mm (2.3 in)	32 of 100 (Routine)
Victoria Downs	Australia	Record daily precipitation	30.5 mm (1.2 in)	32 of 100 (Routine)
Webster City	United States	Record daily snowfall	7.6 cm (3.0 in)	32 of 100 (Routine)
Gayndah Post Office	Australia	Record daily precipitation	61.0 mm (2.4 in)	31 of 100 (Routine)
Balfes Creek Post Office	Australia	Record daily precipitation	46.5 mm (1.8 in)	30 of 100 (Routine)
Alice Post Office	Australia	Record daily precipitation	37.1 mm (1.5 in)	30 of 100 (Routine)
Nanango Wills St	Australia	Record daily precipitation	39.9 mm (1.6 in)	30 of 100 (Routine)
Willard 4 SW	United States	Record daily precipitation	33.8 mm (1.3 in)	30 of 100 (Routine)
Cheraw	United States	Record daily precipitation	39.4 mm (1.6 in)	30 of 100 (Routine)
Barcaldine Post Office	Australia	Record daily precipitation	25.7 mm (1.0 in)	28 of 100 (Routine)
Brisbane Regional Office	Australia	Record low maximum temperature	16.9 C (62.4 F)	28 of 100 (Routine)
Dalby Post Office	Australia	Record low maximum temperature	15.2 C (59.4 F)	28 of 100 (Routine)
Iowa Falls	United States	Record daily snowfall	7.6 cm (3.0 in)	28 of 100 (Routine)
Kinston 7 SE	United States	Record daily precipitation	39.9 mm (1.6 in)	28 of 100 (Routine)
Peak Downs	Australia	Record daily precipitation	46.2 mm (1.8 in)	27 of 100 (Routine)
Port Arthur	Canada	Record daily snowfall	5.1 cm (2.0 in)	27 of 100 (Routine)
Carroll	United States	Record daily snowfall	7.6 cm (3.0 in)	27 of 100 (Routine)
Rockwell City	United States	Record daily snowfall	10.2 cm (4.0 in)	27 of 100 (Routine)
Bird Island	United States	Record daily snowfall	10.2 cm (4.0 in)	27 of 100 (Routine)
Warra Post Office	Australia	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Independence	United States	Record daily precipitation	28.4 mm (1.1 in)	26 of 100 (Routine)
Mason City	United States	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
Waukee	United States	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
West Bend	United States	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
Moncure 3 SE	United States	Record daily precipitation	32.0 mm (1.3 in)	26 of 100 (Routine)
Rockingham	United States	Record daily precipitation	52.8 mm (2.1 in)	26 of 100 (Routine)
Kingston	United States	Record daily precipitation	33.0 mm (1.3 in)	25 of 100 (Routine)
Marshall	United States	Record low maximum temperature	14.4 C (57.9 F)	25 of 100 (Routine)
Cape Leeuwin	Australia	Record high maximum temperature	29.7 C (85.5 F)	24 of 100 (Routine)
Bowen Downs	Australia	Record daily precipitation	33.8 mm (1.3 in)	24 of 100 (Routine)
Goombungee Post Office	Australia	Record daily precipitation	34.3 mm (1.4 in)	24 of 100 (Routine)
Umzimkulu (Tnk)	South Africa	Record daily precipitation	61.0 mm (2.4 in)	24 of 100 (Routine)
Milan Exp STN	United States	Record daily precipitation	38.1 mm (1.5 in)	24 of 100 (Routine)

Counts by Type and Timescale

525 records

Records set or tied on 18 April 1939 by type: Highest daily maximum 52, Lowest daily maximum 199, Highest daily minimum 26, Lowest daily minimum 17, Heaviest daily rainfall 201, Heaviest daily snowfall 23, Deepest snow cover 7.

Records on 18 April 1939 by type
Record type	Records
Highest daily maximum	52
Lowest daily maximum	199
Highest daily minimum	26
Lowest daily minimum	17
Heaviest daily rainfall	201
Heaviest daily snowfall	23
Deepest snow cover	7

Records on 18 April 1939 by timescale: all-time 0, monthly 9, daily 516.

How Much Records Were Beaten By

445 broken records

Margins by which the 445 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 686.0. Ties are not counted.

Top 20 by Significance

18 April 1939

Top 20 records on 18 April 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1939	Dhamtari, IN	monthly rain	81.3 mm (3.2 in)	45.7 mm (1.8 in)	29 years	61 of 100 (Major)
18 April 1939	Algona, US	daily snow depth	50.8 cm (20.0 in)	50.8 cm (20.0 in)	45 years	57 of 100 (Notable)
18 April 1939	Rockwell City, US	daily snow depth	50.8 cm (20.0 in)	50.8 cm (20.0 in)	44 years	57 of 100 (Notable)
18 April 1939	Webster City, US	daily snow depth	68.6 cm (27.0 in)	68.6 cm (27.0 in)	45 years	57 of 100 (Notable)
18 April 1939	Wondai Post Office, AU	daily rain	51.8 mm (2.0 in)	45.4 mm (1.8 in)	26 years	49 of 100 (Notable)
18 April 1939	Forest City 2 NNE, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	42 years	46 of 100 (Notable)
18 April 1939	Ft Dodge 5NNW, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	38 years	46 of 100 (Notable)
18 April 1939	Sirpur, IN	daily rain	29.5 mm (1.2 in)	27.0 mm (1.1 in)	32 years	44 of 100 (Notable)
18 April 1939	Queenton, AU	daily rain	51.3 mm (2.0 in)	38.6 mm (1.5 in)	20 years	43 of 100 (Notable)
18 April 1939	Tangorin, AU	daily rain	63.5 mm (2.5 in)	47.2 mm (1.9 in)	44 years	42 of 100 (Notable)
18 April 1939	Grand Meadow, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	45 years	42 of 100 (Notable)
18 April 1939	Mason City, US	daily snow depth	25.4 cm (10.0 in)	25.4 cm (10.0 in)	42 years	41 of 100 (Notable)
18 April 1939	Markland Dam 39, US	monthly rain	101.6 mm (4.0 in)	25.4 mm (1.0 in)	18 years	40 of 100 (Notable)
18 April 1939	Huntly, AU	daily rain	40.1 mm (1.6 in)	40.1 mm (1.6 in)	42 years	39 of 100 (Notable)
18 April 1939	Rocky Mt, US	daily rain	53.8 mm (2.1 in)	36.8 mm (1.4 in)	13 years	39 of 100 (Notable)
18 April 1939	Plymouth-Kingston, US	daily rain	58.4 mm (2.3 in)	44.2 mm (1.7 in)	28 years	38 of 100 (Notable)
18 April 1939	Lochnagar, AU	daily rain	44.2 mm (1.7 in)	43.4 mm (1.7 in)	36 years	37 of 100 (Notable)
18 April 1939	Estherville 4E, US	daily snowfall	12.7 cm (5.0 in)	10.2 cm (4.0 in)	40 years	37 of 100 (Notable)
18 April 1939	Scotland Neck, US	daily rain	40.1 mm (1.6 in)	29.2 mm (1.1 in)	28 years	37 of 100 (Notable)
18 April 1939	Alta, US	daily snowfall	12.7 cm (5.0 in)	11.4 cm (4.5 in)	28 years	36 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 1939

Records set or tied on this calendar date in each year from 1793 to 1939. 1939 had 525 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 1939-04-18: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 100	436
100 to 200	5
200 to 300	1
300 to 400	0
400 to 500	0
500 to 600	2
600 to 700	1