Weather Records on 17 April 1948

622 weather records were set or tied worldwide on 17 April 1948. Highest significance: Butterworth (Tnk), ZA.

Key Facts for 17 April 1948

On 17 April 1948, 622 weather records were set or tied at long-record stations worldwide.
302 were record highs and 52 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 598 daily.
Butterworth (Tnk) set an all-time record daily precipitation of 192.0 mm (7.6 in) on 17 April 1948.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 451 records.

Record Map

622 stations

622 station records on 17 April 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Butterworth (Tnk)	South Africa	Record daily precipitation	192.0 mm (7.6 in)	71 of 100 (Major)
Jhb-Braamfontein (Cem)	South Africa	Record daily precipitation	80.0 mm (3.1 in)	67 of 100 (Major)
Karratha Station	Australia	Record daily precipitation	55.9 mm (2.2 in)	58 of 100 (Notable)
Newlands	South Africa	Record daily precipitation	29.7 mm (1.2 in)	57 of 100 (Notable)
Grootfontein 11,	South Africa	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Nuwejaarskraal	South Africa	Record daily precipitation	46.2 mm (1.8 in)	47 of 100 (Notable)
Eerstegeluk	South Africa	Record daily precipitation	62.2 mm (2.4 in)	46 of 100 (Notable)
Randfontein (Gm)	South Africa	Record daily precipitation	67.1 mm (2.6 in)	46 of 100 (Notable)
Jhb-Zoological Garden	South Africa	Record daily precipitation	55.6 mm (2.2 in)	46 of 100 (Notable)
Jhb-Norwood	South Africa	Record daily precipitation	51.8 mm (2.0 in)	46 of 100 (Notable)
Klipplaatdrift (Skl)	South Africa	Record daily precipitation	36.8 mm (1.4 in)	45 of 100 (Notable)
Jhb-Vrededorp	South Africa	Record daily precipitation	66.5 mm (2.6 in)	45 of 100 (Notable)
Rienzi	South Africa	Record daily precipitation	38.1 mm (1.5 in)	44 of 100 (Notable)
Boksburg (Mun)	South Africa	Record daily precipitation	36.6 mm (1.4 in)	44 of 100 (Notable)
Nieu-Bethesda (Pol)	South Africa	Record daily precipitation	30.2 mm (1.2 in)	43 of 100 (Notable)
Lowman	United States	Record daily precipitation	25.1 mm (1.0 in)	42 of 100 (Notable)
Walsingham 1	South Africa	Record daily precipitation	76.2 mm (3.0 in)	39 of 100 (Notable)
Gordonville	South Africa	Record daily precipitation	36.1 mm (1.4 in)	39 of 100 (Notable)
Vosburg	South Africa	Record daily precipitation	32.5 mm (1.3 in)	39 of 100 (Notable)
Heidelberg I	South Africa	Record daily precipitation	35.3 mm (1.4 in)	38 of 100 (Notable)
Poortjie	South Africa	Record daily precipitation	33.5 mm (1.3 in)	37 of 100 (Notable)
Smythe	South Africa	Record daily precipitation	43.9 mm (1.7 in)	36 of 100 (Notable)
Nooitgedacht	South Africa	Record daily precipitation	74.9 mm (2.9 in)	36 of 100 (Notable)
Kafferskraal	South Africa	Record daily precipitation	30.5 mm (1.2 in)	36 of 100 (Notable)
Industria	South Africa	Record daily precipitation	58.4 mm (2.3 in)	35 of 100 (Notable)
Grangeville	United States	Record daily precipitation	32.5 mm (1.3 in)	35 of 100 (Notable)
Yarima	South Africa	Record daily precipitation	40.9 mm (1.6 in)	34 of 100 (Routine)
Mmabatho Arpt	South Africa	Record daily precipitation	49.0 mm (1.9 in)	34 of 100 (Routine)
Sandpoint Exp STN	United States	Record daily precipitation	28.4 mm (1.1 in)	34 of 100 (Routine)
Butchers Ridge Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	33 of 100 (Routine)
Porto Real Do Colegio	Brazil	Record daily precipitation	41.0 mm (1.6 in)	33 of 100 (Routine)
Reddersburg (Pol)	South Africa	Record daily precipitation	38.1 mm (1.5 in)	33 of 100 (Routine)
Potchefstroom Agr.	South Africa	Record daily precipitation	39.4 mm (1.6 in)	32 of 100 (Routine)
Roodekop	South Africa	Record daily precipitation	38.4 mm (1.5 in)	32 of 100 (Routine)
Krugersdorp	South Africa	Record daily precipitation	73.7 mm (2.9 in)	32 of 100 (Routine)
Klipspruit (Pur)	South Africa	Record daily precipitation	42.9 mm (1.7 in)	32 of 100 (Routine)
Dinokana	South Africa	Record daily precipitation	90.2 mm (3.6 in)	32 of 100 (Routine)
Santa Fe	United States	Record high maximum temperature	26.1 C (79.0 F)	32 of 100 (Routine)
Albany	Australia	Record daily precipitation	26.7 mm (1.1 in)	30 of 100 (Routine)
Barkly West (Tnk)	South Africa	Record daily precipitation	26.7 mm (1.1 in)	30 of 100 (Routine)
Potchefstroom;Braksp	South Africa	Record daily precipitation	25.4 mm (1.0 in)	30 of 100 (Routine)
Springkell	South Africa	Record daily precipitation	36.3 mm (1.4 in)	30 of 100 (Routine)
Twyfelspoort	South Africa	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Avalon Pleasure Pier	United States	Record high maximum temperature	29.4 C (84.9 F)	30 of 100 (Routine)
Quincy	United States	Record daily precipitation	33.3 mm (1.3 in)	30 of 100 (Routine)
Den Helder	Netherlands	Record high maximum temperature	18.5 C (65.3 F)	29 of 100 (Routine)
Thornlea	South Africa	Record daily precipitation	58.4 mm (2.3 in)	29 of 100 (Routine)
Khosis	South Africa	Record daily precipitation	35.1 mm (1.4 in)	29 of 100 (Routine)
Vryburg (Pol)	South Africa	Record daily precipitation	25.7 mm (1.0 in)	29 of 100 (Routine)
Slurry	South Africa	Record daily precipitation	29.2 mm (1.1 in)	29 of 100 (Routine)
Greeley	United States	Record high minimum temperature	14.4 C (57.9 F)	29 of 100 (Routine)
Clontarf	Canada	Record low minimum temperature	-12.2 C (10.0 F)	28 of 100 (Routine)
Den Helder-1	Netherlands	Record high maximum temperature	19.1 C (66.4 F)	28 of 100 (Routine)
Zamenkomst	South Africa	Record daily precipitation	26.9 mm (1.1 in)	28 of 100 (Routine)
Anchorage Merrill Fld	United States	Record low maximum temperature	-3.9 C (25.0 F)	28 of 100 (Routine)
Fredericton Unb	Canada	Record low maximum temperature	0.6 C (33.1 F)	27 of 100 (Routine)
Zugspitze	Germany	Record snow depth	600.0 cm (236.2 in)	27 of 100 (Routine)
Wexford	South Africa	Record daily precipitation	44.2 mm (1.7 in)	27 of 100 (Routine)
Ottosdal	South Africa	Record daily precipitation	38.1 mm (1.5 in)	27 of 100 (Routine)
Vlakfontein	South Africa	Record daily precipitation	27.7 mm (1.1 in)	27 of 100 (Routine)

Counts by Type and Timescale

622 records

Records set or tied on 17 April 1948 by type: Highest daily maximum 210, Lowest daily maximum 17, Highest daily minimum 92, Lowest daily minimum 35, Heaviest daily rainfall 261, Heaviest daily snowfall 6, Deepest snow cover 1.

Records on 17 April 1948 by type
Record type	Records
Highest daily maximum	210
Lowest daily maximum	17
Highest daily minimum	92
Lowest daily minimum	35
Heaviest daily rainfall	261
Heaviest daily snowfall	6
Deepest snow cover	1

Records on 17 April 1948 by timescale: all-time 1, monthly 23, daily 598.

How Much Records Were Beaten By

500 broken records

Margins by which the 500 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1500.0. Ties are not counted.

Top 20 by Significance

17 April 1948

Top 20 records on 17 April 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1948	Butterworth (Tnk), ZA	all-time rain	192.0 mm (7.6 in)	65.3 mm (2.6 in)	16 years	71 of 100 (Major)
17 April 1948	Jhb-Braamfontein (Cem), ZA	monthly rain	80.0 mm (3.1 in)	32.5 mm (1.3 in)	45 years	67 of 100 (Major)
17 April 1948	Karratha Station, AU	daily rain	55.9 mm (2.2 in)	55.9 mm (2.2 in)	47 years	58 of 100 (Notable)
17 April 1948	Newlands, ZA	daily rain	29.7 mm (1.2 in)	23.3 mm (0.9 in)	62 years	57 of 100 (Notable)
17 April 1948	Grootfontein 11,, ZA	daily rain	35.1 mm (1.4 in)	32.3 mm (1.3 in)	14 years	47 of 100 (Notable)
17 April 1948	Nuwejaarskraal, ZA	daily rain	46.2 mm (1.8 in)	27.1 mm (1.1 in)	40 years	47 of 100 (Notable)
17 April 1948	Eerstegeluk, ZA	monthly rain	62.2 mm (2.4 in)	26.1 mm (1.0 in)	10 years	46 of 100 (Notable)
17 April 1948	Randfontein (Gm), ZA	daily rain	67.1 mm (2.6 in)	58.5 mm (2.3 in)	8 years	46 of 100 (Notable)
17 April 1948	Jhb-Zoological Garden, ZA	daily rain	55.6 mm (2.2 in)	50.3 mm (2.0 in)	10 years	46 of 100 (Notable)
17 April 1948	Jhb-Norwood, ZA	daily rain	51.8 mm (2.0 in)	41.1 mm (1.6 in)	10 years	46 of 100 (Notable)
17 April 1948	Klipplaatdrift (Skl), ZA	daily rain	36.8 mm (1.4 in)	34.8 mm (1.4 in)	17 years	45 of 100 (Notable)
17 April 1948	Jhb-Vrededorp, ZA	monthly rain	66.5 mm (2.6 in)	19.8 mm (0.8 in)	17 years	45 of 100 (Notable)
17 April 1948	Rienzi, ZA	daily rain	38.1 mm (1.5 in)	30.2 mm (1.2 in)	23 years	44 of 100 (Notable)
17 April 1948	Boksburg (Mun), ZA	daily rain	36.6 mm (1.4 in)	24.2 mm (1.0 in)	40 years	44 of 100 (Notable)
17 April 1948	Nieu-Bethesda (Pol), ZA	daily rain	30.2 mm (1.2 in)	18.3 mm (0.7 in)	37 years	43 of 100 (Notable)
17 April 1948	Lowman, US	daily rain	25.1 mm (1.0 in)	17.5 mm (0.7 in)	23 years	42 of 100 (Notable)
17 April 1948	Walsingham 1, ZA	monthly rain	76.2 mm (3.0 in)	8.6 mm (0.34 in)	41 years	39 of 100 (Notable)
17 April 1948	Gordonville, ZA	daily rain	36.1 mm (1.4 in)	21.9 mm (0.9 in)	40 years	39 of 100 (Notable)
17 April 1948	Vosburg, ZA	daily rain	32.5 mm (1.3 in)	17.3 mm (0.7 in)	41 years	39 of 100 (Notable)
17 April 1948	Heidelberg I, ZA	daily rain	35.3 mm (1.4 in)	19.0 mm (0.7 in)	36 years	38 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 1948

Records set or tied on this calendar date in each year from 1799 to 1948. 1948 had 622 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 1948-04-17: 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 200	499
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	0
1200 to 1400	0
1400 to 1600	1