Weather Records on 17 April 1973

589 weather records were set or tied worldwide on 17 April 1973. Highest significance: Harnosand, SE.

Key Facts for 17 April 1973

On 17 April 1973, 589 weather records were set or tied at long-record stations worldwide.
261 were record highs and 79 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 581 daily.
Harnosand set a daily record precipitation of 45.8 mm (1.8 in) on 17 April 1973.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 452 records.

Record Map

589 stations

589 station records on 17 April 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Harnosand	Sweden	Record daily precipitation	45.8 mm (1.8 in)	80 of 100 (Exceptional)
Lady Barron (Franklin Parade)	Australia	Record daily precipitation	52.8 mm (2.1 in)	61 of 100 (Major)
Flinders Island Airport	Australia	Record daily precipitation	65.0 mm (2.6 in)	59 of 100 (Notable)
Heber	United States	Record daily precipitation	26.9 mm (1.1 in)	58 of 100 (Notable)
Franklin 3 NW	United States	Record daily precipitation	146.1 mm (5.8 in)	55 of 100 (Notable)
Houma	United States	Record daily precipitation	149.6 mm (5.9 in)	52 of 100 (Notable)
Paradis 7 S	United States	Record daily precipitation	118.1 mm (4.6 in)	52 of 100 (Notable)
Thule	Australia	Record daily precipitation	73.2 mm (2.9 in)	49 of 100 (Notable)
Poplarville Exp STN	United States	Record daily precipitation	77.7 mm (3.1 in)	48 of 100 (Notable)
Morgan City	United States	Record daily precipitation	127.8 mm (5.0 in)	47 of 100 (Notable)
Winton	South Africa	Record daily precipitation	75.0 mm (3.0 in)	45 of 100 (Notable)
Ilyinskiy	Russia	Record daily precipitation	29.5 mm (1.2 in)	44 of 100 (Notable)
St Hyacinthe	Canada	Record high minimum temperature	13.9 C (57.0 F)	43 of 100 (Notable)
Podor	Senegal	Record low maximum temperature	31.9 C (89.4 F)	43 of 100 (Notable)
Jennings	United States	Record daily precipitation	87.4 mm (3.4 in)	41 of 100 (Notable)
New Orleans WSO City	United States	Record daily precipitation	109.7 mm (4.3 in)	38 of 100 (Notable)
Biskra	Algeria	Record low maximum temperature	17.0 C (62.6 F)	37 of 100 (Notable)
Fajardo	Puerto Rico [United States]	Record high maximum temperature	36.1 C (97.0 F)	37 of 100 (Notable)
Oaknolia 2N	United States	Record daily precipitation	100.3 mm (3.9 in)	37 of 100 (Notable)
Farmington	United States	Record high maximum temperature	24.4 C (75.9 F)	37 of 100 (Notable)
Runge	United States	Record daily precipitation	64.8 mm (2.6 in)	37 of 100 (Notable)
Sidsjo	Sweden	Record daily precipitation	25.5 mm (1.0 in)	36 of 100 (Notable)
Alton	United States	Record snow depth	25.4 cm (10.0 in)	36 of 100 (Notable)
Houston Wb City	United States	Record daily precipitation	42.2 mm (1.7 in)	36 of 100 (Notable)
Ft Valley	United States	Record snow depth	43.2 cm (17.0 in)	35 of 100 (Notable)
Baton Rouge Metro AP	United States	Record daily precipitation	75.2 mm (3.0 in)	35 of 100 (Notable)
Salgadalia	Brazil	Record daily precipitation	42.0 mm (1.7 in)	34 of 100 (Routine)
Warren 2 S	United States	Record daily precipitation	70.4 mm (2.8 in)	34 of 100 (Routine)
Martiros	Armenia	Record daily precipitation	32.6 mm (1.3 in)	33 of 100 (Routine)
Dayton 1 N	United States	Record daily precipitation	73.9 mm (2.9 in)	33 of 100 (Routine)
Pine Grove Fire Twr	United States	Record daily precipitation	98.8 mm (3.9 in)	33 of 100 (Routine)
Hanover	United States	Record high minimum temperature	11.1 C (52.0 F)	33 of 100 (Routine)
Hallettsville 2 N	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Dixon	United States	Record daily snowfall	25.4 cm (10.0 in)	33 of 100 (Routine)
Chicoutimi	Canada	Record high minimum temperature	9.4 C (48.9 F)	32 of 100 (Routine)
Astana	Kazakhstan	Record high minimum temperature	8.4 C (47.1 F)	32 of 100 (Routine)
Storrs	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Hammond	United States	Record daily precipitation	124.2 mm (4.9 in)	32 of 100 (Routine)
Comanche	United States	Record daily precipitation	43.4 mm (1.7 in)	32 of 100 (Routine)
Cape Barren Island (Cape Barre	Australia	Record daily precipitation	41.4 mm (1.6 in)	31 of 100 (Routine)
Garrison	United States	Record high minimum temperature	8.3 C (46.9 F)	31 of 100 (Routine)
Walgett Council Depot	Australia	Record high maximum temperature	34.5 C (94.1 F)	30 of 100 (Routine)
Perpignan	France	Record low minimum temperature	3.8 C (38.8 F)	30 of 100 (Routine)
Jakutsk	Russia	Record low minimum temperature	-28.9 C (-20.0 F)	30 of 100 (Routine)
Donaldsonville 4 SW	United States	Record daily precipitation	76.2 mm (3.0 in)	30 of 100 (Routine)
Jeanerette 5 NW	United States	Record daily precipitation	96.3 mm (3.8 in)	30 of 100 (Routine)
Edinburg	United States	Record daily precipitation	78.7 mm (3.1 in)	30 of 100 (Routine)
Brackettville	United States	Record daily precipitation	30.5 mm (1.2 in)	30 of 100 (Routine)
Perm	Russia	Record high maximum temperature	23.5 C (74.3 F)	29 of 100 (Routine)
Palmyra	South Africa	Record daily precipitation	32.0 mm (1.3 in)	29 of 100 (Routine)
Oujda	Morocco	Record low maximum temperature	9.0 C (48.2 F)	28 of 100 (Routine)
Huatusco de Chicuellar	Mexico	Record daily precipitation	34.8 mm (1.4 in)	28 of 100 (Routine)
Kurgan	Russia	Record high minimum temperature	7.9 C (46.2 F)	28 of 100 (Routine)
Novorossijsk	Russia	Record daily precipitation	27.7 mm (1.1 in)	28 of 100 (Routine)
Ljubljana Bezigrad	Slovenia	Record low minimum temperature	-0.3 C (31.5 F)	28 of 100 (Routine)
Dialville 2 W	United States	Record daily precipitation	66.0 mm (2.6 in)	28 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record daily precipitation	41.9 mm (1.6 in)	28 of 100 (Routine)
Collegeville	Canada	Record high maximum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Nappan Cda	Canada	Record high maximum temperature	18.9 C (66.0 F)	27 of 100 (Routine)
Madison	United States	Record high maximum temperature	25.0 C (77.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

589 records

Records set or tied on 17 April 1973 by type: Highest daily maximum 138, Lowest daily maximum 41, Highest daily minimum 123, Lowest daily minimum 38, Heaviest daily rainfall 234, Heaviest daily snowfall 11, Deepest snow cover 4.

Records on 17 April 1973 by type
Record type	Records
Highest daily maximum	138
Lowest daily maximum	41
Highest daily minimum	123
Lowest daily minimum	38
Heaviest daily rainfall	234
Heaviest daily snowfall	11
Deepest snow cover	4

Records on 17 April 1973 by timescale: all-time 0, monthly 8, daily 581.

How Much Records Were Beaten By

507 broken records

Margins by which the 507 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 305.0. Ties are not counted.

Top 20 by Significance

17 April 1973

Top 20 records on 17 April 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1973	Harnosand, SE	daily rain	45.8 mm (1.8 in)	23.7 mm (0.9 in)	113 years	80 of 100 (Exceptional)
17 April 1973	Lady Barron (Franklin Parade), AU	daily rain	52.8 mm (2.1 in)	39.3 mm (1.5 in)	52 years	61 of 100 (Major)
17 April 1973	Flinders Island Airport, AU	monthly rain	65.0 mm (2.6 in)	26.6 mm (1.0 in)	23 years	59 of 100 (Notable)
17 April 1973	Heber, US	daily rain	26.9 mm (1.1 in)	14.2 mm (0.6 in)	67 years	58 of 100 (Notable)
17 April 1973	Franklin 3 NW, US	daily rain	146.1 mm (5.8 in)	94.8 mm (3.7 in)	43 years	55 of 100 (Notable)
17 April 1973	Houma, US	daily rain	149.6 mm (5.9 in)	99.8 mm (3.9 in)	28 years	52 of 100 (Notable)
17 April 1973	Paradis 7 S, US	daily rain	118.1 mm (4.6 in)	86.9 mm (3.4 in)	28 years	52 of 100 (Notable)
17 April 1973	Thule, AU	daily rain	73.2 mm (2.9 in)	24.7 mm (1.0 in)	40 years	49 of 100 (Notable)
17 April 1973	Poplarville Exp STN, US	daily rain	77.7 mm (3.1 in)	53.3 mm (2.1 in)	50 years	48 of 100 (Notable)
17 April 1973	Morgan City, US	daily rain	127.8 mm (5.0 in)	80.6 mm (3.2 in)	43 years	47 of 100 (Notable)
17 April 1973	Winton, ZA	monthly rain	75.0 mm (3.0 in)	26.5 mm (1.0 in)	13 years	45 of 100 (Notable)
17 April 1973	Ilyinskiy, RU	daily rain	29.5 mm (1.2 in)	22.7 mm (0.9 in)	20 years	44 of 100 (Notable)
17 April 1973	St Hyacinthe, CA	monthly high min	13.9 C (57.0 F)	1.1 C (2.0 F)	78 years	43 of 100 (Notable)
17 April 1973	Podor, SN	daily low max	31.9 C (89.4 F)	1.1 C (2.0 F)	115 years	43 of 100 (Notable)
17 April 1973	Jennings, US	daily rain	87.4 mm (3.4 in)	43.2 mm (1.7 in)	60 years	41 of 100 (Notable)
17 April 1973	New Orleans WSO City, US	daily rain	109.7 mm (4.3 in)	65.0 mm (2.6 in)	16 years	38 of 100 (Notable)
17 April 1973	Biskra, DZ	daily low max	17.0 C (62.6 F)	0.8 C (1.4 F)	87 years	37 of 100 (Notable)
17 April 1973	Fajardo, PR	daily high max	36.1 C (97.0 F)	3.3 C (5.9 F)	42 years	37 of 100 (Notable)
17 April 1973	Oaknolia 2N, US	daily rain	100.3 mm (3.9 in)	63.5 mm (2.5 in)	30 years	37 of 100 (Notable)
17 April 1973	Farmington, US	daily high max	24.4 C (75.9 F)	3.8 C (6.8 F)	78 years	37 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 1973

Records set or tied on this calendar date in each year from 1799 to 1973. 1973 had 589 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 1973-04-17: 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 50	493
50 to 100	10
100 to 150	1
150 to 200	1
200 to 250	0
250 to 300	1
300 to 350	1