Weather Records on 17 April 1938

564 weather records were set or tied worldwide on 17 April 1938. Highest significance: Old Noarlunga Post Office, AU.

Key Facts for 17 April 1938

On 17 April 1938, 564 weather records were set or tied at long-record stations worldwide.
230 were record highs and 12 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 21 monthly and 538 daily.
Old Noarlunga Post Office set a daily record precipitation of 62.2 mm (2.4 in) on 17 April 1938.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 452 records.

Record Map

564 stations

564 station records on 17 April 1938 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1938: highest significance records shown on the map
Station	Country	Type	Value	Significance
Old Noarlunga Post Office	Australia	Record daily precipitation	62.2 mm (2.4 in)	60 of 100 (Major)
Cape Willoughby	Australia	Record daily precipitation	37.6 mm (1.5 in)	59 of 100 (Notable)
Ashbourne	Australia	Record daily precipitation	57.9 mm (2.3 in)	59 of 100 (Notable)
Beachport	Australia	Record daily precipitation	36.8 mm (1.4 in)	59 of 100 (Notable)
Belair (Kalyra)	Australia	Record daily precipitation	53.8 mm (2.1 in)	55 of 100 (Notable)
Steytlerville (Mag)	South Africa	Record daily precipitation	43.7 mm (1.7 in)	55 of 100 (Notable)
Cape Northumberland	Australia	Record daily precipitation	45.7 mm (1.8 in)	54 of 100 (Notable)
Lake Leake (Kooeeyong)	Australia	Record daily precipitation	37.3 mm (1.5 in)	53 of 100 (Notable)
Brinkley	United States	Record daily precipitation	106.2 mm (4.2 in)	51 of 100 (Notable)
Stockport	Australia	Record daily precipitation	49.5 mm (1.9 in)	50 of 100 (Notable)
Adelaide (Brighton)	Australia	Record daily precipitation	38.6 mm (1.5 in)	49 of 100 (Notable)
Amphitheatre	Australia	Record daily precipitation	28.7 mm (1.1 in)	49 of 100 (Notable)
Dartmoor	Australia	Record daily precipitation	30.5 mm (1.2 in)	49 of 100 (Notable)
Glen Garrie	Australia	Record daily precipitation	38.1 mm (1.5 in)	48 of 100 (Notable)
Tintinara	Australia	Record daily precipitation	45.7 mm (1.8 in)	48 of 100 (Notable)
Lawloit	Australia	Record daily precipitation	33.0 mm (1.3 in)	47 of 100 (Notable)
Victor Harbor Comparison	Australia	Record daily precipitation	32.3 mm (1.3 in)	45 of 100 (Notable)
Biscuit Flat (Woolmit)	Australia	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Aldinga Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Echunga Golf Course	Australia	Record daily precipitation	90.9 mm (3.6 in)	43 of 100 (Notable)
Harrogate	Australia	Record daily precipitation	44.2 mm (1.7 in)	43 of 100 (Notable)
Palmer	Australia	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Casterton (Warrock)	Australia	Record daily precipitation	35.6 mm (1.4 in)	43 of 100 (Notable)
Sterling	South Africa	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
Smith Bay (Smiths Bay)	Australia	Record daily precipitation	30.2 mm (1.2 in)	42 of 100 (Notable)
Birdwood	Australia	Record daily precipitation	93.0 mm (3.7 in)	41 of 100 (Notable)
Happy Valley Reservoir	Australia	Record daily precipitation	62.0 mm (2.4 in)	41 of 100 (Notable)
Second Valley (Poolamacca)	Australia	Record daily precipitation	36.3 mm (1.4 in)	40 of 100 (Notable)
Stonyfell	Australia	Record daily precipitation	56.6 mm (2.2 in)	40 of 100 (Notable)
Mount McIntyre	Australia	Record daily precipitation	40.6 mm (1.6 in)	40 of 100 (Notable)
Puralka	Australia	Record daily precipitation	25.4 mm (1.0 in)	40 of 100 (Notable)
Goroke (Post Office)	Australia	Record daily precipitation	26.9 mm (1.1 in)	39 of 100 (Notable)
Fulham Park	Australia	Record daily precipitation	38.9 mm (1.5 in)	38 of 100 (Notable)
Portland	Australia	Record daily precipitation	29.2 mm (1.1 in)	38 of 100 (Notable)
Koffiefontein (Pol)	South Africa	Record daily precipitation	36.8 mm (1.4 in)	38 of 100 (Notable)
Roodepoort (Mun)	South Africa	Record daily precipitation	26.7 mm (1.1 in)	38 of 100 (Notable)
North Adelaide	Australia	Record daily precipitation	61.2 mm (2.4 in)	37 of 100 (Notable)
Cherry Gardens	Australia	Record daily precipitation	112.0 mm (4.4 in)	37 of 100 (Notable)
Harrow (Pine Hills)	Australia	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Moonambel	Australia	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Pipestone	United States	Record daily precipitation	35.6 mm (1.4 in)	37 of 100 (Notable)
Mount Barker	Australia	Record daily precipitation	77.7 mm (3.1 in)	36 of 100 (Notable)
Mooralla (Woodleigh)	Australia	Record daily precipitation	29.7 mm (1.2 in)	36 of 100 (Notable)
Bridgewater	Australia	Record daily precipitation	93.2 mm (3.7 in)	35 of 100 (Notable)
Finniss	Australia	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Karnak (Rosedale)	Australia	Record daily precipitation	25.1 mm (1.0 in)	35 of 100 (Notable)
Princetown	Australia	Record daily precipitation	30.5 mm (1.2 in)	35 of 100 (Notable)
Durban Roodepoort Deep Gm	South Africa	Record daily precipitation	36.6 mm (1.4 in)	35 of 100 (Notable)
Portsmouth-Sciotoville	United States	Record daily precipitation	41.4 mm (1.6 in)	35 of 100 (Notable)
Casterton (Roseneath)	Australia	Record daily precipitation	32.5 mm (1.3 in)	34 of 100 (Routine)
Macclesfield	Australia	Record daily precipitation	66.3 mm (2.6 in)	32 of 100 (Routine)
Huntsville	Canada	Record daily precipitation	41.1 mm (1.6 in)	32 of 100 (Routine)
Kanmantoo	Australia	Record daily precipitation	50.8 mm (2.0 in)	31 of 100 (Routine)
Goroke (Kangawall)	Australia	Record daily precipitation	27.7 mm (1.1 in)	31 of 100 (Routine)
Coromandel Valley (Branden)	Australia	Record daily precipitation	65.8 mm (2.6 in)	30 of 100 (Routine)
Lucindale Post Office	Australia	Record daily precipitation	36.3 mm (1.4 in)	30 of 100 (Routine)
Wyalong Post Office	Australia	Record daily precipitation	31.8 mm (1.3 in)	29 of 100 (Routine)
Eagle Pass 3N	United States	Record daily precipitation	50.8 mm (2.0 in)	29 of 100 (Routine)
Hondo	United States	Record daily precipitation	64.3 mm (2.5 in)	29 of 100 (Routine)
Dergholm (Hillgrove)	Australia	Record daily precipitation	29.7 mm (1.2 in)	28 of 100 (Routine)

Counts by Type and Timescale

564 records

Records set or tied on 17 April 1938 by type: Highest daily maximum 41, Lowest daily maximum 7, Highest daily minimum 189, Lowest daily minimum 5, Heaviest daily rainfall 322.

Records on 17 April 1938 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	7
Highest daily minimum	189
Lowest daily minimum	5
Heaviest daily rainfall	322
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 April 1938 by timescale: all-time 5, monthly 21, daily 538.

How Much Records Were Beaten By

481 broken records

Margins by which the 481 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.8. Ties are not counted.

Top 20 by Significance

17 April 1938

Top 20 records on 17 April 1938 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1938	Old Noarlunga Post Office, AU	daily rain	62.2 mm (2.4 in)	41.9 mm (1.6 in)	48 years	60 of 100 (Major)
17 April 1938	Cape Willoughby, AU	daily rain	37.6 mm (1.5 in)	29.5 mm (1.2 in)	48 years	59 of 100 (Notable)
17 April 1938	Ashbourne, AU	daily rain	57.9 mm (2.3 in)	35.8 mm (1.4 in)	48 years	59 of 100 (Notable)
17 April 1938	Beachport, AU	daily rain	36.8 mm (1.4 in)	26.6 mm (1.0 in)	48 years	59 of 100 (Notable)
17 April 1938	Belair (Kalyra), AU	daily rain	53.8 mm (2.1 in)	33.5 mm (1.3 in)	39 years	55 of 100 (Notable)
17 April 1938	Steytlerville (Mag), ZA	daily rain	43.7 mm (1.7 in)	42.4 mm (1.7 in)	39 years	55 of 100 (Notable)
17 April 1938	Cape Northumberland, AU	daily rain	45.7 mm (1.8 in)	24.1 mm (0.9 in)	25 years	54 of 100 (Notable)
17 April 1938	Lake Leake (Kooeeyong), AU	daily rain	37.3 mm (1.5 in)	24.1 mm (0.9 in)	39 years	53 of 100 (Notable)
17 April 1938	Brinkley, US	daily rain	106.2 mm (4.2 in)	82.8 mm (3.3 in)	20 years	51 of 100 (Notable)
17 April 1938	Stockport, AU	daily rain	49.5 mm (1.9 in)	44.4 mm (1.7 in)	16 years	50 of 100 (Notable)
17 April 1938	Adelaide (Brighton), AU	daily rain	38.6 mm (1.5 in)	27.4 mm (1.1 in)	16 years	49 of 100 (Notable)
17 April 1938	Amphitheatre, AU	daily rain	28.7 mm (1.1 in)	22.6 mm (0.9 in)	44 years	49 of 100 (Notable)
17 April 1938	Dartmoor, AU	daily rain	30.5 mm (1.2 in)	20.8 mm (0.8 in)	48 years	49 of 100 (Notable)
17 April 1938	Glen Garrie, AU	daily rain	38.1 mm (1.5 in)	35.1 mm (1.4 in)	16 years	48 of 100 (Notable)
17 April 1938	Tintinara, AU	daily rain	45.7 mm (1.8 in)	38.8 mm (1.5 in)	16 years	48 of 100 (Notable)
17 April 1938	Lawloit, AU	daily rain	33.0 mm (1.3 in)	22.3 mm (0.9 in)	16 years	47 of 100 (Notable)
17 April 1938	Victor Harbor Comparison, AU	daily rain	32.3 mm (1.3 in)	20.6 mm (0.8 in)	39 years	45 of 100 (Notable)
17 April 1938	Biscuit Flat (Woolmit), AU	daily rain	35.6 mm (1.4 in)	22.9 mm (0.9 in)	9 years	45 of 100 (Notable)
17 April 1938	Aldinga Post Office, AU	daily rain	31.0 mm (1.2 in)	20.3 mm (0.8 in)	25 years	44 of 100 (Notable)
17 April 1938	Echunga Golf Course, AU	monthly rain	90.9 mm (3.6 in)	12.7 mm (0.5 in)	48 years	43 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

1799 to 1938

Records set or tied on this calendar date in each year from 1799 to 1938. 1938 had 564 records.

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

Records on 04-17 in each year
Year	Records
1799	1
1807	1
1808	1
1815	1
1817	1
1818	1
1819	1
1823	1
1825	1
1830	1
1835	3
1837	1
1845	1
1847	2
1851	1
1852	3
1853	1
1854	1
1855	1
1857	1
1858	1
1862	1
1865	2
1868	1
1873	4
1874	1
1875	3
1877	4
1878	2
1880	2
1889	1
1890	2
1891	2
1892	4
1894	5
1895	1
1896	5
1897	6
1898	3
1899	1
1900	2
1901	4
1902	4
1903	5
1904	19
1905	11
1906	14
1907	16
1908	38
1909	7
1910	29
1911	33
1912	27
1913	20
1914	83
1915	30
1916	30
1917	32
1918	35
1919	39
1920	87
1921	148
1922	96
1923	71
1924	74
1925	103
1926	140
1927	256
1928	308
1929	145
1930	238
1931	216
1932	615
1933	261
1934	234
1935	374
1936	308
1937	439
1938	564
1939	618
1940	337
1941	460
1942	415
1943	285
1944	334
1945	475
1946	492
1947	461
1948	622
1949	439
1950	293
1951	441
1952	529
1953	818
1954	650
1955	394
1956	486
1957	277
1958	702
1959	434
1960	553
1961	667
1962	597
1963	702
1964	766
1965	411
1966	409
1967	935
1968	745
1969	728
1970	547
1971	924
1972	546
1973	589
1974	244
1975	666
1976	1,630
1977	906
1978	620
1979	810
1980	675
1981	621
1982	965
1983	1,365
1984	720
1985	917
1986	997
1987	960
1988	1,082
1989	638
1990	1,065
1991	614
1992	1,105
1993	847
1994	1,047
1995	1,211
1996	1,044
1997	889
1998	1,795
1999	1,730
2000	1,082
2001	1,013
2002	2,284
2003	1,037
2004	761
2005	572
2006	1,430
2007	863
2008	842
2009	779
2010	606
2011	982
2012	920
2013	1,796
2014	913
2015	813
2016	977
2017	469
2018	1,585
2019	458
2020	1,165
2021	701
2022	831
2023	628
2024	690
2025	1,058
2026	838

Download the Data

Data for records on 1938-04-17: 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 20	444
20 to 40	33
40 to 60	3
60 to 80	0
80 to 100	1