Weather Records on 21 April 2017

797 weather records were set or tied worldwide on 21 April 2017. Highest significance: Walpeup, AU.

Key Facts for 21 April 2017

On 21 April 2017, 797 weather records were set or tied at long-record stations worldwide.
216 were record highs and 130 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 37 monthly and 758 daily.
Walpeup set a daily record precipitation of 57.8 mm (2.3 in) on 21 April 2017.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

797 stations

797 station records on 21 April 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Walpeup	Australia	Record daily precipitation	57.8 mm (2.3 in)	80 of 100 (Exceptional)
Kaniva	Australia	Record daily precipitation	55.4 mm (2.2 in)	80 of 100 (Exceptional)
Natimuk	Australia	Record daily precipitation	41.4 mm (1.6 in)	80 of 100 (Exceptional)
Kerang (Meran Downs)	Australia	Record daily precipitation	65.2 mm (2.6 in)	80 of 100 (Exceptional)
Kisinev	Moldova	Record daily precipitation	39.9 mm (1.6 in)	80 of 100 (Exceptional)
Parilla	Australia	Record daily precipitation	69.8 mm (2.7 in)	78 of 100 (Major)
Wentworth (Burtundy)	Australia	Record daily precipitation	58.2 mm (2.3 in)	78 of 100 (Major)
Sea Lake (Post Office)	Australia	Record daily precipitation	53.6 mm (2.1 in)	77 of 100 (Major)
Berriwillock	Australia	Record daily precipitation	52.4 mm (2.1 in)	74 of 100 (Major)
Birchip (Woodlands)	Australia	Record daily precipitation	55.4 mm (2.2 in)	74 of 100 (Major)
Woomelang	Australia	Record daily precipitation	103.2 mm (4.1 in)	74 of 100 (Major)
Portageville 1N	United States	Record daily precipitation	49.5 mm (1.9 in)	73 of 100 (Major)
Kingston on Murray	Australia	Record daily precipitation	37.2 mm (1.5 in)	72 of 100 (Major)
Loxton (Pyap)	Australia	Record daily precipitation	54.6 mm (2.1 in)	72 of 100 (Major)
Nhill (Woorak)	Australia	Record daily precipitation	34.6 mm (1.4 in)	71 of 100 (Major)
Beulah	Australia	Record daily precipitation	41.0 mm (1.6 in)	70 of 100 (Major)
Mincha	Australia	Record daily precipitation	40.6 mm (1.6 in)	70 of 100 (Major)
Gunbower Gee Tee Stud	Australia	Record daily precipitation	32.8 mm (1.3 in)	69 of 100 (Major)
Kerang	Australia	Record daily precipitation	44.6 mm (1.8 in)	69 of 100 (Major)
Moulamein Post Office	Australia	Record daily precipitation	39.4 mm (1.6 in)	68 of 100 (Major)
Canary Island	Australia	Record daily precipitation	45.0 mm (1.8 in)	68 of 100 (Major)
Ceahlau Toaca	Romania	Record daily precipitation	62.4 mm (2.5 in)	67 of 100 (Major)
Werrimull	Australia	Record daily precipitation	27.2 mm (1.1 in)	66 of 100 (Major)
Avon	United States	Record daily precipitation	57.2 mm (2.3 in)	66 of 100 (Major)
Rosedale (Turretfield Research	Australia	Record daily precipitation	32.0 mm (1.3 in)	65 of 100 (Major)
Pinnaroo	Australia	Record daily precipitation	56.0 mm (2.2 in)	65 of 100 (Major)
Paruna	Australia	Record daily precipitation	31.2 mm (1.2 in)	64 of 100 (Major)
Warracknabeal (Earlstan)	Australia	Record daily precipitation	32.8 mm (1.3 in)	64 of 100 (Major)
Clear Lake	Australia	Record daily precipitation	36.4 mm (1.4 in)	64 of 100 (Major)
Wolseley	Australia	Record daily precipitation	36.0 mm (1.4 in)	63 of 100 (Major)
Bronzewing	Australia	Record daily precipitation	56.4 mm (2.2 in)	63 of 100 (Major)
Lalbert	Australia	Record daily precipitation	50.6 mm (2.0 in)	63 of 100 (Major)
Hemlock	United States	Record daily precipitation	40.6 mm (1.6 in)	62 of 100 (Major)
Clare (Calcannia)	Australia	Record daily precipitation	45.0 mm (1.8 in)	61 of 100 (Major)
Brinkworth (Bungaree)	Australia	Record daily precipitation	54.4 mm (2.1 in)	60 of 100 (Major)
Williamstown	Australia	Record daily precipitation	48.2 mm (1.9 in)	59 of 100 (Notable)
Williamstown (Glen Gillian)	Australia	Record daily precipitation	49.4 mm (1.9 in)	59 of 100 (Notable)
Lyrup	Australia	Record daily precipitation	35.0 mm (1.4 in)	58 of 100 (Notable)
Manangatang (Eureka East)	Australia	Record daily precipitation	47.0 mm (1.9 in)	58 of 100 (Notable)
Birchip (Marlbed)	Australia	Record daily precipitation	60.0 mm (2.4 in)	58 of 100 (Notable)
Balmoral (Post Office)	Australia	Record daily precipitation	32.0 mm (1.3 in)	58 of 100 (Notable)
Roseworthy	Australia	Record daily precipitation	44.0 mm (1.7 in)	57 of 100 (Notable)
Lowaldie (Carramar Stud)	Australia	Record daily precipitation	75.6 mm (3.0 in)	56 of 100 (Notable)
Durham Ox	Australia	Record daily precipitation	41.4 mm (1.6 in)	56 of 100 (Notable)
Overland Corner	Australia	Record daily precipitation	28.0 mm (1.1 in)	55 of 100 (Notable)
Gladfield Hopefield Estate	Australia	Record daily precipitation	42.0 mm (1.7 in)	55 of 100 (Notable)
Geary	United States	Record daily precipitation	79.0 mm (3.1 in)	55 of 100 (Notable)
Jamestown Dpi	Australia	Record daily precipitation	26.0 mm (1.0 in)	54 of 100 (Notable)
Wycheproof (Post Office)	Australia	Record daily precipitation	38.4 mm (1.5 in)	54 of 100 (Notable)
Kerang Model Farm	Australia	Record daily precipitation	54.0 mm (2.1 in)	54 of 100 (Notable)
Merino	Australia	Record daily precipitation	35.8 mm (1.4 in)	54 of 100 (Notable)
Longerenong	Australia	Record daily precipitation	51.6 mm (2.0 in)	53 of 100 (Notable)
Murtoa	Australia	Record daily precipitation	31.0 mm (1.2 in)	52 of 100 (Notable)
Ithaca Cornell UNIV	United States	Record daily precipitation	42.2 mm (1.7 in)	52 of 100 (Notable)
Dutton	Australia	Record daily precipitation	27.8 mm (1.1 in)	51 of 100 (Notable)
Wentworth (Wamberra Station)	Australia	Record daily precipitation	51.0 mm (2.0 in)	51 of 100 (Notable)
Drung Drung	Australia	Record daily precipitation	28.6 mm (1.1 in)	51 of 100 (Notable)
Cape Bridgewater	Australia	Record daily precipitation	30.8 mm (1.2 in)	51 of 100 (Notable)
Perryton 11 WNW	United States	Record daily precipitation	53.3 mm (2.1 in)	51 of 100 (Notable)
Nyah (Yarraby Tank)	Australia	Record daily precipitation	50.0 mm (2.0 in)	50 of 100 (Notable)

Counts by Type and Timescale

797 records

Records set or tied on 21 April 2017 by type: Highest daily maximum 71, Lowest daily maximum 48, Highest daily minimum 145, Lowest daily minimum 82, Heaviest daily rainfall 442, Heaviest daily snowfall 5, Deepest snow cover 4.

Records on 21 April 2017 by type
Record type	Records
Highest daily maximum	71
Lowest daily maximum	48
Highest daily minimum	145
Lowest daily minimum	82
Heaviest daily rainfall	442
Heaviest daily snowfall	5
Deepest snow cover	4

Records on 21 April 2017 by timescale: all-time 2, monthly 37, daily 758.

How Much Records Were Beaten By

718 broken records

Margins by which the 718 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 130.0. Ties are not counted.

Top 20 by Significance

21 April 2017

Top 20 records on 21 April 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2017	Walpeup, AU	daily rain	57.8 mm (2.3 in)	38.7 mm (1.5 in)	103 years	80 of 100 (Exceptional)
21 April 2017	Kaniva, AU	daily rain	55.4 mm (2.2 in)	32.5 mm (1.3 in)	121 years	80 of 100 (Exceptional)
21 April 2017	Natimuk, AU	daily rain	41.4 mm (1.6 in)	25.9 mm (1.0 in)	103 years	80 of 100 (Exceptional)
21 April 2017	Kerang (Meran Downs), AU	daily rain	65.2 mm (2.6 in)	39.8 mm (1.6 in)	103 years	80 of 100 (Exceptional)
21 April 2017	Kisinev, MD	daily rain	39.9 mm (1.6 in)	24.6 mm (1.0 in)	100 years	80 of 100 (Exceptional)
21 April 2017	Parilla, AU	monthly rain	69.8 mm (2.7 in)	29.2 mm (1.1 in)	63 years	78 of 100 (Major)
21 April 2017	Wentworth (Burtundy), AU	monthly rain	58.2 mm (2.3 in)	21.9 mm (0.9 in)	120 years	78 of 100 (Major)
21 April 2017	Sea Lake (Post Office), AU	daily rain	53.6 mm (2.1 in)	25.7 mm (1.0 in)	103 years	77 of 100 (Major)
21 April 2017	Berriwillock, AU	daily rain	52.4 mm (2.1 in)	26.0 mm (1.0 in)	103 years	74 of 100 (Major)
21 April 2017	Birchip (Woodlands), AU	daily rain	55.4 mm (2.2 in)	25.9 mm (1.0 in)	103 years	74 of 100 (Major)
21 April 2017	Woomelang, AU	monthly rain	103.2 mm (4.1 in)	22.4 mm (0.9 in)	91 years	74 of 100 (Major)
21 April 2017	Portageville 1N, US	daily rain	49.5 mm (1.9 in)	23.6 mm (0.9 in)	112 years	73 of 100 (Major)
21 April 2017	Kingston on Murray, AU	daily rain	37.2 mm (1.5 in)	27.5 mm (1.1 in)	75 years	72 of 100 (Major)
21 April 2017	Loxton (Pyap), AU	monthly rain	54.6 mm (2.1 in)	15.0 mm (0.6 in)	91 years	72 of 100 (Major)
21 April 2017	Nhill (Woorak), AU	daily rain	34.6 mm (1.4 in)	21.4 mm (0.8 in)	103 years	71 of 100 (Major)
21 April 2017	Beulah, AU	daily rain	41.0 mm (1.6 in)	18.9 mm (0.7 in)	103 years	70 of 100 (Major)
21 April 2017	Mincha, AU	daily rain	40.6 mm (1.6 in)	20.8 mm (0.8 in)	103 years	70 of 100 (Major)
21 April 2017	Gunbower Gee Tee Stud, AU	daily rain	32.8 mm (1.3 in)	20.9 mm (0.8 in)	103 years	69 of 100 (Major)
21 April 2017	Kerang, AU	daily rain	44.6 mm (1.8 in)	22.2 mm (0.9 in)	103 years	69 of 100 (Major)
21 April 2017	Moulamein Post Office, AU	daily rain	39.4 mm (1.6 in)	23.4 mm (0.9 in)	103 years	68 of 100 (Major)

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 2017

Records set or tied on this calendar date in each year from 1793 to 2017. 2017 had 797 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 2017-04-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 20	641
20 to 40	65
40 to 60	8
60 to 80	2
80 to 100	1
100 to 120	0
120 to 140	1