Weather Records on 17 April 1971

924 weather records were set or tied worldwide on 17 April 1971. Highest significance: Glenelg Post Office, AU.

Key Facts for 17 April 1971

On 17 April 1971, 924 weather records were set or tied at long-record stations worldwide.
78 were record highs and 162 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 46 monthly and 877 daily.
Glenelg Post Office set an all-time record daily precipitation of 92.5 mm (3.6 in) on 17 April 1971.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 450 records.

Record Map

924 stations

924 station records on 17 April 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Glenelg Post Office	Australia	Record daily precipitation	92.5 mm (3.6 in)	85 of 100 (Exceptional)
Yanco Glen (Corona Homestead)	Australia	Record daily precipitation	36.6 mm (1.4 in)	74 of 100 (Major)
Terowie	Australia	Record daily precipitation	28.7 mm (1.1 in)	73 of 100 (Major)
Moorna	Australia	Record daily precipitation	37.8 mm (1.5 in)	73 of 100 (Major)
Broken Hill (Patton Street)	Australia	Record daily precipitation	48.3 mm (1.9 in)	65 of 100 (Major)
Deloraine	Canada	Record daily precipitation	37.1 mm (1.5 in)	63 of 100 (Major)
Wentworth (Cuthero)	Australia	Record daily precipitation	69.9 mm (2.8 in)	62 of 100 (Major)
Lorraine	Australia	Record daily precipitation	102.9 mm (4.1 in)	61 of 100 (Major)
Netley	Australia	Record daily precipitation	53.1 mm (2.1 in)	61 of 100 (Major)
Yongala	Australia	Record daily precipitation	32.8 mm (1.3 in)	60 of 100 (Major)
Mundoora	Australia	Record daily precipitation	49.8 mm (2.0 in)	60 of 100 (Major)
Tjamotis	Sweden	Record daily precipitation	29.5 mm (1.2 in)	60 of 100 (Major)
Booleroo (Wimont)	Australia	Record daily precipitation	34.3 mm (1.4 in)	59 of 100 (Notable)
Wentworth (Willow Point)	Australia	Record daily precipitation	62.7 mm (2.5 in)	58 of 100 (Notable)
Bruce	Australia	Record daily precipitation	63.8 mm (2.5 in)	57 of 100 (Notable)
Peterborough	Australia	Record daily precipitation	29.5 mm (1.2 in)	57 of 100 (Notable)
Wentworth (Woodlands)	Australia	Record daily precipitation	69.6 mm (2.7 in)	57 of 100 (Notable)
Hammond	Australia	Record daily precipitation	40.1 mm (1.6 in)	56 of 100 (Notable)
Curnomona (Curnamona)	Australia	Record daily precipitation	38.6 mm (1.5 in)	56 of 100 (Notable)
McKinlay Roadhouse	Australia	Record daily precipitation	102.6 mm (4.0 in)	56 of 100 (Notable)
Podor	Senegal	Record high minimum temperature	31.0 C (87.8 F)	56 of 100 (Notable)
Carrieton (Eurelia)	Australia	Record daily precipitation	29.5 mm (1.2 in)	55 of 100 (Notable)
Orroroo	Australia	Record daily precipitation	29.5 mm (1.2 in)	55 of 100 (Notable)
Silverton Post Office	Australia	Record daily precipitation	48.3 mm (1.9 in)	54 of 100 (Notable)
Umberumberka Reservoir	Australia	Record daily precipitation	44.5 mm (1.8 in)	54 of 100 (Notable)
Merbein Csiro Research Station	Australia	Record daily precipitation	53.3 mm (2.1 in)	54 of 100 (Notable)
Neds Corner	Australia	Record daily precipitation	49.5 mm (1.9 in)	54 of 100 (Notable)
Muloorina Station (Muloorina H	Australia	Record daily precipitation	33.5 mm (1.3 in)	53 of 100 (Notable)
Port Broughton	Australia	Record daily precipitation	36.3 mm (1.4 in)	53 of 100 (Notable)
Merrinee	Australia	Record daily precipitation	34.3 mm (1.4 in)	53 of 100 (Notable)
Willah	Australia	Record daily precipitation	28.7 mm (1.1 in)	53 of 100 (Notable)
Cockburn	Australia	Record daily precipitation	51.8 mm (2.0 in)	52 of 100 (Notable)
Hallett (Old Canowie)	Australia	Record daily precipitation	40.6 mm (1.6 in)	52 of 100 (Notable)
Red Cliffs (Post Office)	Australia	Record daily precipitation	35.6 mm (1.4 in)	52 of 100 (Notable)
Booleroo Centre	Australia	Record daily precipitation	39.6 mm (1.6 in)	51 of 100 (Notable)
Cockburn (Tepco)	Australia	Record daily precipitation	47.2 mm (1.9 in)	51 of 100 (Notable)
Brandon Cda	Canada	Record daily precipitation	36.1 mm (1.4 in)	51 of 100 (Notable)
Canobie	Australia	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Wentworth Post Office	Australia	Record daily precipitation	47.8 mm (1.9 in)	50 of 100 (Notable)
Yunta (Paratoo)	Australia	Record daily precipitation	32.3 mm (1.3 in)	49 of 100 (Notable)
Mooleulooloo	Australia	Record daily precipitation	38.4 mm (1.5 in)	49 of 100 (Notable)
Snowtown (Condowie)	Australia	Record daily precipitation	25.4 mm (1.0 in)	49 of 100 (Notable)
Hallett	Australia	Record daily precipitation	33.8 mm (1.3 in)	49 of 100 (Notable)
Pirlta	Australia	Record daily precipitation	34.3 mm (1.4 in)	49 of 100 (Notable)
Itatiba	Brazil	Record daily precipitation	57.0 mm (2.2 in)	49 of 100 (Notable)
Cruz Do Espirito Santo	Brazil	Record daily precipitation	90.2 mm (3.6 in)	48 of 100 (Notable)
Booleroo Centre (Willowie)	Australia	Record daily precipitation	48.0 mm (1.9 in)	47 of 100 (Notable)
Bimbowrie	Australia	Record daily precipitation	36.1 mm (1.4 in)	47 of 100 (Notable)
Goldfield	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Kainaliu 73.2	United States	Record daily precipitation	54.4 mm (2.1 in)	47 of 100 (Notable)
Angorichina Hostel	Australia	Record daily precipitation	27.4 mm (1.1 in)	46 of 100 (Notable)
Tarcowie	Australia	Record daily precipitation	27.2 mm (1.1 in)	45 of 100 (Notable)
Kadina	Australia	Record daily precipitation	56.4 mm (2.2 in)	45 of 100 (Notable)
Bimerah	Australia	Record daily precipitation	25.4 mm (1.0 in)	45 of 100 (Notable)
Adavale Post Office	Australia	Record daily precipitation	29.0 mm (1.1 in)	45 of 100 (Notable)
Jamestown	Australia	Record daily precipitation	34.0 mm (1.3 in)	44 of 100 (Notable)
Alni	Australia	Record daily precipitation	85.1 mm (3.4 in)	44 of 100 (Notable)
Keeroongooloo	Australia	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Beulah	Australia	Record daily precipitation	26.7 mm (1.1 in)	44 of 100 (Notable)
Virden	Canada	Record daily precipitation	29.5 mm (1.2 in)	44 of 100 (Notable)

Counts by Type and Timescale

924 records

Records set or tied on 17 April 1971 by type: Highest daily maximum 27, Lowest daily maximum 75, Highest daily minimum 51, Lowest daily minimum 87, Heaviest daily rainfall 604, Heaviest daily snowfall 65, Deepest snow cover 15.

Records on 17 April 1971 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	75
Highest daily minimum	51
Lowest daily minimum	87
Heaviest daily rainfall	604
Heaviest daily snowfall	65
Deepest snow cover	15

Records on 17 April 1971 by timescale: all-time 1, monthly 46, daily 877.

How Much Records Were Beaten By

828 broken records

Margins by which the 828 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 432.0. Ties are not counted.

Top 20 by Significance

17 April 1971

Top 20 records on 17 April 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1971	Glenelg Post Office, AU	all-time rain	92.5 mm (3.6 in)	30.3 mm (1.2 in)	58 years	85 of 100 (Exceptional)
17 April 1971	Yanco Glen (Corona Homestead), AU	daily rain	36.6 mm (1.4 in)	36.6 mm (1.4 in)	85 years	74 of 100 (Major)
17 April 1971	Terowie, AU	daily rain	28.7 mm (1.1 in)	23.6 mm (0.9 in)	81 years	73 of 100 (Major)
17 April 1971	Moorna, AU	daily rain	37.8 mm (1.5 in)	32.0 mm (1.3 in)	81 years	73 of 100 (Major)
17 April 1971	Broken Hill (Patton Street), AU	daily rain	48.3 mm (1.9 in)	37.9 mm (1.5 in)	62 years	65 of 100 (Major)
17 April 1971	Deloraine, CA	daily rain	37.1 mm (1.5 in)	36.8 mm (1.4 in)	56 years	63 of 100 (Major)
17 April 1971	Wentworth (Cuthero), AU	monthly rain	69.9 mm (2.8 in)	26.7 mm (1.1 in)	42 years	62 of 100 (Major)
17 April 1971	Lorraine, AU	daily rain	102.9 mm (4.1 in)	97.6 mm (3.8 in)	60 years	61 of 100 (Major)
17 April 1971	Netley, AU	daily rain	53.1 mm (2.1 in)	32.8 mm (1.3 in)	62 years	61 of 100 (Major)
17 April 1971	Yongala, AU	daily rain	32.8 mm (1.3 in)	17.6 mm (0.7 in)	81 years	60 of 100 (Major)
17 April 1971	Mundoora, AU	daily rain	49.8 mm (2.0 in)	20.6 mm (0.8 in)	81 years	60 of 100 (Major)
17 April 1971	Tjamotis, SE	monthly rain	29.5 mm (1.2 in)	14.7 mm (0.6 in)	18 years	60 of 100 (Major)
17 April 1971	Booleroo (Wimont), AU	daily rain	34.3 mm (1.4 in)	18.8 mm (0.7 in)	81 years	59 of 100 (Notable)
17 April 1971	Wentworth (Willow Point), AU	monthly rain	62.7 mm (2.5 in)	28.4 mm (1.1 in)	16 years	58 of 100 (Notable)
17 April 1971	Bruce, AU	monthly rain	63.8 mm (2.5 in)	16.0 mm (0.6 in)	50 years	57 of 100 (Notable)
17 April 1971	Peterborough, AU	daily rain	29.5 mm (1.2 in)	21.4 mm (0.8 in)	29 years	57 of 100 (Notable)
17 April 1971	Wentworth (Woodlands), AU	monthly rain	69.6 mm (2.7 in)	31.2 mm (1.2 in)	7 years	57 of 100 (Notable)
17 April 1971	Hammond, AU	daily rain	40.1 mm (1.6 in)	29.7 mm (1.2 in)	29 years	56 of 100 (Notable)
17 April 1971	Curnomona (Curnamona), AU	daily rain	38.6 mm (1.5 in)	25.9 mm (1.0 in)	75 years	56 of 100 (Notable)
17 April 1971	McKinlay Roadhouse, AU	monthly rain	102.6 mm (4.0 in)	45.4 mm (1.8 in)	21 years	56 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 1971

Records set or tied on this calendar date in each year from 1799 to 1971. 1971 had 924 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 1971-04-17: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 100	820
100 to 200	4
200 to 300	1
300 to 400	1
400 to 500	2