Weather Records on 18 April 1938

711 weather records were set or tied worldwide on 18 April 1938. Highest significance: Ararat Post Office, AU.

Key Facts for 18 April 1938

On 18 April 1938, 711 weather records were set or tied at long-record stations worldwide.
230 were record highs and 31 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 23 monthly and 686 daily.
Ararat Post Office set a daily record precipitation of 46.2 mm (1.8 in) on 18 April 1938.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 466 records.

Record Map

711 stations

711 station records on 18 April 1938 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1938: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ararat Post Office	Australia	Record daily precipitation	46.2 mm (1.8 in)	64 of 100 (Major)
Frances	Australia	Record daily precipitation	34.5 mm (1.4 in)	58 of 100 (Notable)
Scotsburn (Mount Boninyong)	Australia	Record daily precipitation	42.9 mm (1.7 in)	57 of 100 (Notable)
Lyonville	Australia	Record daily precipitation	69.6 mm (2.7 in)	57 of 100 (Notable)
Ardrossan	Australia	Record daily precipitation	41.1 mm (1.6 in)	56 of 100 (Notable)
Woodside	Australia	Record daily precipitation	110.7 mm (4.4 in)	56 of 100 (Notable)
Nhill	Australia	Record daily precipitation	35.1 mm (1.4 in)	56 of 100 (Notable)
Adelaide (Glen Osmond)	Australia	Record daily precipitation	66.3 mm (2.6 in)	55 of 100 (Notable)
Mount Lofty Summit	Australia	Record daily precipitation	122.9 mm (4.8 in)	55 of 100 (Notable)
Ballarat Botanical Gardens	Australia	Record daily precipitation	52.6 mm (2.1 in)	55 of 100 (Notable)
Smythesdale	Australia	Record daily precipitation	78.7 mm (3.1 in)	55 of 100 (Notable)
Mitcham Post Office	Australia	Record daily precipitation	64.0 mm (2.5 in)	54 of 100 (Notable)
Ruffy	Australia	Record daily precipitation	41.9 mm (1.6 in)	54 of 100 (Notable)
Gumeracha	Australia	Record daily precipitation	56.9 mm (2.2 in)	53 of 100 (Notable)
Naracoorte	Australia	Record daily precipitation	36.1 mm (1.4 in)	53 of 100 (Notable)
Jeparit	Australia	Record daily precipitation	31.0 mm (1.2 in)	53 of 100 (Notable)
Nqamakwe (Tnk)	South Africa	Record daily precipitation	59.2 mm (2.3 in)	53 of 100 (Notable)
Minlaton	Australia	Record daily precipitation	35.3 mm (1.4 in)	52 of 100 (Notable)
Angaston	Australia	Record daily precipitation	41.4 mm (1.6 in)	51 of 100 (Notable)
Strathbogie North	Australia	Record daily precipitation	66.0 mm (2.6 in)	51 of 100 (Notable)
Whitfield	Australia	Record daily precipitation	55.9 mm (2.2 in)	51 of 100 (Notable)
Casterton Post Office	Australia	Record daily precipitation	46.0 mm (1.8 in)	51 of 100 (Notable)
Diapur	Australia	Record daily precipitation	33.0 mm (1.3 in)	50 of 100 (Notable)
Dandongadale (Mountain View)	Australia	Record daily precipitation	55.9 mm (2.2 in)	50 of 100 (Notable)
Penola Post Office	Australia	Record daily precipitation	34.5 mm (1.4 in)	49 of 100 (Notable)
Lancefield	Australia	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Boonara	Australia	Record daily precipitation	54.6 mm (2.1 in)	47 of 100 (Notable)
Harrietville	Australia	Record daily precipitation	53.3 mm (2.1 in)	47 of 100 (Notable)
Jamieson	Australia	Record daily precipitation	46.2 mm (1.8 in)	47 of 100 (Notable)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Coliban Upper	Australia	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Daylesford	Australia	Record daily precipitation	70.4 mm (2.8 in)	47 of 100 (Notable)
Kinglake West (Wallaby Creek)	Australia	Record daily precipitation	66.3 mm (2.6 in)	47 of 100 (Notable)
Redbank	Australia	Record daily precipitation	37.1 mm (1.5 in)	46 of 100 (Notable)
Beales Reservoir	Australia	Record daily precipitation	47.0 mm (1.9 in)	46 of 100 (Notable)
Keith	Australia	Record daily precipitation	39.6 mm (1.6 in)	45 of 100 (Notable)
Warracknabeal Post Office	Australia	Record daily precipitation	26.4 mm (1.0 in)	45 of 100 (Notable)
Wilsons Reservoir	Australia	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Dunkeld	Australia	Record daily precipitation	33.3 mm (1.3 in)	45 of 100 (Notable)
Ballarat Mount Pleasant Obs.	Australia	Record daily precipitation	56.6 mm (2.2 in)	45 of 100 (Notable)
Tyrendarra (Ellangowan)	Australia	Record daily precipitation	27.4 mm (1.1 in)	45 of 100 (Notable)
Linton Post Office	Australia	Record daily precipitation	46.0 mm (1.8 in)	44 of 100 (Notable)
Heywood Post Office	Australia	Record daily precipitation	38.9 mm (1.5 in)	44 of 100 (Notable)
Princetown (Rivernook)	Australia	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Adelaide (Salisbury Bowling Cl	Australia	Record daily precipitation	47.0 mm (1.9 in)	42 of 100 (Notable)
Douglas	Australia	Record daily precipitation	30.0 mm (1.2 in)	42 of 100 (Notable)
Lake Eildon	Australia	Record daily precipitation	33.5 mm (1.3 in)	42 of 100 (Notable)
Leslie Manor (Boolarra)	Australia	Record daily precipitation	34.8 mm (1.4 in)	42 of 100 (Notable)
Cofimvaba (Tnk)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	42 of 100 (Notable)
Alexandra (Post Office)	Australia	Record daily precipitation	31.5 mm (1.2 in)	41 of 100 (Notable)
Expedition Pass Reservoir	Australia	Record daily precipitation	33.8 mm (1.3 in)	41 of 100 (Notable)
Nairne	Australia	Record daily precipitation	73.4 mm (2.9 in)	40 of 100 (Notable)
Woods Point	Australia	Record daily precipitation	83.1 mm (3.3 in)	40 of 100 (Notable)
Yea	Australia	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Hamley Bridge	Australia	Record daily precipitation	36.6 mm (1.4 in)	39 of 100 (Notable)
Ashton 1	Australia	Record daily precipitation	41.4 mm (1.6 in)	39 of 100 (Notable)
Elaine (Larundel)	Australia	Record daily precipitation	28.2 mm (1.1 in)	39 of 100 (Notable)
Barkers Creek Reservoir	Australia	Record daily precipitation	28.7 mm (1.1 in)	39 of 100 (Notable)
Balfour (Pol)	South Africa	Record daily precipitation	36.8 mm (1.4 in)	39 of 100 (Notable)
Lake Charles Chenault	United States	Record daily precipitation	88.4 mm (3.5 in)	39 of 100 (Notable)

Counts by Type and Timescale

711 records

Records set or tied on 18 April 1938 by type: Highest daily maximum 64, Lowest daily maximum 8, Highest daily minimum 166, Lowest daily minimum 23, Heaviest daily rainfall 450.

Records on 18 April 1938 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	8
Highest daily minimum	166
Lowest daily minimum	23
Heaviest daily rainfall	450
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 April 1938 by timescale: all-time 2, monthly 23, daily 686.

How Much Records Were Beaten By

623 broken records

Margins by which the 623 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 66.0. Ties are not counted.

Top 20 by Significance

18 April 1938

Top 20 records on 18 April 1938 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1938	Ararat Post Office, AU	daily rain	46.2 mm (1.8 in)	31.0 mm (1.2 in)	59 years	64 of 100 (Major)
18 April 1938	Frances, AU	daily rain	34.5 mm (1.4 in)	24.6 mm (1.0 in)	45 years	58 of 100 (Notable)
18 April 1938	Scotsburn (Mount Boninyong), AU	daily rain	42.9 mm (1.7 in)	32.7 mm (1.3 in)	45 years	57 of 100 (Notable)
18 April 1938	Lyonville, AU	daily rain	69.6 mm (2.7 in)	35.3 mm (1.4 in)	52 years	57 of 100 (Notable)
18 April 1938	Ardrossan, AU	daily rain	41.1 mm (1.6 in)	25.9 mm (1.0 in)	39 years	56 of 100 (Notable)
18 April 1938	Woodside, AU	all-time rain	110.7 mm (4.4 in)	22.3 mm (0.9 in)	28 years	56 of 100 (Notable)
18 April 1938	Nhill, AU	daily rain	35.1 mm (1.4 in)	25.7 mm (1.0 in)	45 years	56 of 100 (Notable)
18 April 1938	Adelaide (Glen Osmond), AU	daily rain	66.3 mm (2.6 in)	39.6 mm (1.6 in)	33 years	55 of 100 (Notable)
18 April 1938	Mount Lofty Summit, AU	all-time rain	122.9 mm (4.8 in)	24.3 mm (1.0 in)	28 years	55 of 100 (Notable)
18 April 1938	Ballarat Botanical Gardens, AU	daily rain	52.6 mm (2.1 in)	32.5 mm (1.3 in)	33 years	55 of 100 (Notable)
18 April 1938	Smythesdale, AU	monthly rain	78.7 mm (3.1 in)	48.2 mm (1.9 in)	9 years	55 of 100 (Notable)
18 April 1938	Mitcham Post Office, AU	daily rain	64.0 mm (2.5 in)	33.5 mm (1.3 in)	39 years	54 of 100 (Notable)
18 April 1938	Ruffy, AU	daily rain	41.9 mm (1.6 in)	31.7 mm (1.2 in)	43 years	54 of 100 (Notable)
18 April 1938	Gumeracha, AU	daily rain	56.9 mm (2.2 in)	40.4 mm (1.6 in)	24 years	53 of 100 (Notable)
18 April 1938	Naracoorte, AU	daily rain	36.1 mm (1.4 in)	25.9 mm (1.0 in)	33 years	53 of 100 (Notable)
18 April 1938	Jeparit, AU	daily rain	31.0 mm (1.2 in)	27.2 mm (1.1 in)	31 years	53 of 100 (Notable)
18 April 1938	Nqamakwe (Tnk), ZA	daily rain	59.2 mm (2.3 in)	43.7 mm (1.7 in)	37 years	53 of 100 (Notable)
18 April 1938	Minlaton, AU	daily rain	35.3 mm (1.4 in)	26.2 mm (1.0 in)	24 years	52 of 100 (Notable)
18 April 1938	Angaston, AU	daily rain	41.4 mm (1.6 in)	29.2 mm (1.1 in)	48 years	51 of 100 (Notable)
18 April 1938	Strathbogie North, AU	daily rain	66.0 mm (2.6 in)	48.2 mm (1.9 in)	43 years	51 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 1938

Records set or tied on this calendar date in each year from 1793 to 1938. 1938 had 711 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 1938-04-18: 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 10	448
10 to 20	105
20 to 30	41
30 to 40	17
40 to 50	10
50 to 60	1
60 to 70	1