Weather Records on 17 March 1973

943 weather records were set or tied worldwide on 17 March 1973. Highest significance: Ann Arbor U of Mich, US.

Key Facts for 17 March 1973

On 17 March 1973, 943 weather records were set or tied at long-record stations worldwide.
206 were record highs and 55 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 30 monthly and 909 daily.
Ann Arbor U of Mich set a daily record snowfall of 31.5 cm (12.4 in) on 17 March 1973.
Across 161 earlier years (1825 to 2026) the same calendar date averaged 472 records.

Record Map

943 stations

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

Weather records on 17 March 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ann Arbor U of Mich	United States	Record daily snowfall	31.5 cm (12.4 in)	68 of 100 (Major)
Bloomfield	Canada	Record daily precipitation	33.8 mm (1.3 in)	63 of 100 (Major)
Saginaw Mbs Intl AP	United States	Record daily precipitation	51.8 mm (2.0 in)	63 of 100 (Major)
Kosciusko	United States	Record daily precipitation	119.4 mm (4.7 in)	62 of 100 (Major)
Belair (State Flora Nursery)	Australia	Record daily precipitation	29.2 mm (1.1 in)	60 of 100 (Major)
Cooya Pooya	Australia	Record daily precipitation	163.8 mm (6.4 in)	59 of 100 (Notable)
Chickamauga 2 SW	United States	Record daily precipitation	136.4 mm (5.4 in)	59 of 100 (Notable)
Corinth 5 WSW	United States	Record daily precipitation	86.1 mm (3.4 in)	58 of 100 (Notable)
Old Forge	United States	Record daily precipitation	39.6 mm (1.6 in)	57 of 100 (Notable)
Lucknow	Canada	Record daily snowfall	20.3 cm (8.0 in)	56 of 100 (Notable)
St Charles de Mandeville	Canada	Record daily precipitation	44.7 mm (1.8 in)	56 of 100 (Notable)
Adrian 2 NNE	United States	Record snow depth	30.5 cm (12.0 in)	56 of 100 (Notable)
Avon	United States	Record daily precipitation	48.3 mm (1.9 in)	56 of 100 (Notable)
Port Hope	Canada	Record daily precipitation	27.9 mm (1.1 in)	55 of 100 (Notable)
Ft Washakie 1 SE	United States	Record snow depth	50.8 cm (20.0 in)	55 of 100 (Notable)
Adrian 2 NNE	United States	Record daily snowfall	29.2 cm (11.5 in)	53 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily snowfall	54.1 cm (21.3 in)	53 of 100 (Notable)
Huntington	United States	Record daily snowfall	25.4 cm (10.0 in)	52 of 100 (Notable)
London Int'l Airport	Canada	Record daily precipitation	33.0 mm (1.3 in)	51 of 100 (Notable)
Idlewild	United States	Record daily precipitation	90.9 mm (3.6 in)	51 of 100 (Notable)
Mitchell Dam	United States	Record daily precipitation	94.5 mm (3.7 in)	50 of 100 (Notable)
Canton	United States	Record daily precipitation	73.7 mm (2.9 in)	50 of 100 (Notable)
Brucefield	Canada	Record daily snowfall	17.8 cm (7.0 in)	49 of 100 (Notable)
Trenton A	Canada	Record daily precipitation	49.3 mm (1.9 in)	49 of 100 (Notable)
Verma	Norway	Record daily precipitation	25.0 mm (1.0 in)	49 of 100 (Notable)
Hastings	United States	Record daily snowfall	30.5 cm (12.0 in)	49 of 100 (Notable)
Tapoco	United States	Record daily precipitation	86.1 mm (3.4 in)	49 of 100 (Notable)
Toronto Lester B. Pearson Int'	Canada	Record daily precipitation	39.6 mm (1.6 in)	48 of 100 (Notable)
Coldwater St School	United States	Record snow depth	27.9 cm (11.0 in)	48 of 100 (Notable)
Milford Gm Proving Ground	United States	Record daily snowfall	22.9 cm (9.0 in)	48 of 100 (Notable)
Defiance	United States	Record daily precipitation	41.9 mm (1.6 in)	48 of 100 (Notable)
Pulaski 2 E	United States	Record daily precipitation	67.3 mm (2.6 in)	48 of 100 (Notable)
Port Stanley	Canada	Record daily snowfall	12.7 cm (5.0 in)	47 of 100 (Notable)
Anderson	United States	Record daily precipitation	83.3 mm (3.3 in)	47 of 100 (Notable)
Maysville	United States	Record daily precipitation	87.6 mm (3.4 in)	46 of 100 (Notable)
Harrow Cda	Canada	Record daily snowfall	20.8 cm (8.2 in)	45 of 100 (Notable)
Nicolet	Canada	Record daily precipitation	41.1 mm (1.6 in)	45 of 100 (Notable)
Lumpkin 2 SE	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Ann Arbor U of Mich	United States	Record daily precipitation	38.4 mm (1.5 in)	45 of 100 (Notable)
Ionia 2SSW	United States	Record daily snowfall	26.2 cm (10.3 in)	45 of 100 (Notable)
Laurens	United States	Record daily precipitation	73.2 mm (2.9 in)	45 of 100 (Notable)
Darrington Rs	United States	Record daily snowfall	15.2 cm (6.0 in)	45 of 100 (Notable)
Terra Roxa	Brazil	Record daily precipitation	90.8 mm (3.6 in)	44 of 100 (Notable)
London Int'l Airport	Canada	Record daily snowfall	23.6 cm (9.3 in)	44 of 100 (Notable)
Cumming 2N	United States	Record daily precipitation	80.0 mm (3.1 in)	44 of 100 (Notable)
Albion	United States	Record snow depth	38.1 cm (15.0 in)	44 of 100 (Notable)
Glendale Springs	United States	Record daily precipitation	87.1 mm (3.4 in)	44 of 100 (Notable)
Midland Water Pollution Contro	Canada	Record daily snowfall	22.9 cm (9.0 in)	43 of 100 (Notable)
Barrage Angliers	Canada	Record daily snowfall	20.8 cm (8.2 in)	43 of 100 (Notable)
Rochester	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Charlotte	United States	Record daily precipitation	45.2 mm (1.8 in)	43 of 100 (Notable)
Jefferson 2 E	United States	Record daily precipitation	65.8 mm (2.6 in)	43 of 100 (Notable)
Findlay Wpcc	United States	Record daily snowfall	12.7 cm (5.0 in)	43 of 100 (Notable)
Ft Wayne Intl AP	United States	Record daily snowfall	24.1 cm (9.5 in)	43 of 100 (Notable)
Minderoo	Australia	Record daily precipitation	114.8 mm (4.5 in)	42 of 100 (Notable)
Muskoka A	Canada	Record daily precipitation	32.5 mm (1.3 in)	42 of 100 (Notable)
Huberdeau	Canada	Record daily precipitation	27.2 mm (1.1 in)	42 of 100 (Notable)
Beaverdale 1 E	United States	Record daily precipitation	85.1 mm (3.4 in)	42 of 100 (Notable)
Marion 2 N	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Ann Arbor U of Mich	United States	Record snow depth	30.5 cm (12.0 in)	42 of 100 (Notable)

Counts by Type and Timescale

943 records

Records set or tied on 17 March 1973 by type: Highest daily maximum 54, Lowest daily maximum 32, Highest daily minimum 152, Lowest daily minimum 23, Heaviest daily rainfall 503, Heaviest daily snowfall 149, Deepest snow cover 30.

Records on 17 March 1973 by type
Record type	Records
Highest daily maximum	54
Lowest daily maximum	32
Highest daily minimum	152
Lowest daily minimum	23
Heaviest daily rainfall	503
Heaviest daily snowfall	149
Deepest snow cover	30

Records on 17 March 1973 by timescale: all-time 4, monthly 30, daily 909.

How Much Records Were Beaten By

832 broken records

Margins by which the 832 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 356.0. Ties are not counted.

Top 20 by Significance

17 March 1973

Top 20 records on 17 March 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 March 1973	Ann Arbor U of Mich, US	daily snowfall	31.5 cm (12.4 in)	18.3 cm (7.2 in)	68 years	68 of 100 (Major)
17 March 1973	Bloomfield, CA	daily rain	33.8 mm (1.3 in)	22.6 mm (0.9 in)	74 years	63 of 100 (Major)
17 March 1973	Saginaw Mbs Intl AP, US	daily rain	51.8 mm (2.0 in)	28.7 mm (1.1 in)	54 years	63 of 100 (Major)
17 March 1973	Kosciusko, US	daily rain	119.4 mm (4.7 in)	68.3 mm (2.7 in)	54 years	62 of 100 (Major)
17 March 1973	Belair (State Flora Nursery), AU	daily rain	29.2 mm (1.1 in)	23.4 mm (0.9 in)	78 years	60 of 100 (Major)
17 March 1973	Cooya Pooya, AU	daily rain	163.8 mm (6.4 in)	142.7 mm (5.6 in)	56 years	59 of 100 (Notable)
17 March 1973	Chickamauga 2 SW, US	daily rain	136.4 mm (5.4 in)	88.1 mm (3.5 in)	36 years	59 of 100 (Notable)
17 March 1973	Corinth 5 WSW, US	daily rain	86.1 mm (3.4 in)	60.2 mm (2.4 in)	36 years	58 of 100 (Notable)
17 March 1973	Old Forge, US	daily rain	39.6 mm (1.6 in)	26.9 mm (1.1 in)	64 years	57 of 100 (Notable)
17 March 1973	Lucknow, CA	daily snowfall	20.3 cm (8.0 in)	11.4 cm (4.5 in)	67 years	56 of 100 (Notable)
17 March 1973	St Charles de Mandeville, CA	daily rain	44.7 mm (1.8 in)	27.7 mm (1.1 in)	36 years	56 of 100 (Notable)
17 March 1973	Adrian 2 NNE, US	daily snow depth	30.5 cm (12.0 in)	20.3 cm (8.0 in)	72 years	56 of 100 (Notable)
17 March 1973	Avon, US	daily rain	48.3 mm (1.9 in)	26.2 mm (1.0 in)	36 years	56 of 100 (Notable)
17 March 1973	Port Hope, CA	daily rain	27.9 mm (1.1 in)	17.7 mm (0.7 in)	68 years	55 of 100 (Notable)
17 March 1973	Ft Washakie 1 SE, US	daily snow depth	50.8 cm (20.0 in)	35.6 cm (14.0 in)	39 years	55 of 100 (Notable)
17 March 1973	Adrian 2 NNE, US	daily snowfall	29.2 cm (11.5 in)	20.3 cm (8.0 in)	16 years	53 of 100 (Notable)
17 March 1973	Saginaw Mbs Intl AP, US	all-time snowfall	54.1 cm (21.3 in)	11.2 cm (4.4 in)	6 years	53 of 100 (Notable)
17 March 1973	Huntington, US	daily snowfall	25.4 cm (10.0 in)	21.3 cm (8.4 in)	14 years	52 of 100 (Notable)
17 March 1973	London Int'l Airport, CA	daily rain	33.0 mm (1.3 in)	25.6 mm (1.0 in)	28 years	51 of 100 (Notable)
17 March 1973	Idlewild, US	daily rain	90.9 mm (3.6 in)	59.4 mm (2.3 in)	30 years	51 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

1825 to 1973

Records set or tied on this calendar date in each year from 1825 to 1973. 1973 had 943 records.

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

Records on 03-17 in each year
Year	Records
1825	2
1839	1
1845	1
1850	2
1852	1
1853	1
1856	1
1857	1
1863	1
1866	2
1867	1
1869	1
1870	1
1872	1
1874	3
1876	1
1877	2
1878	3
1879	1
1881	1
1882	4
1883	1
1884	3
1885	3
1886	1
1887	3
1888	2
1889	3
1890	2
1892	1
1895	5
1896	2
1897	9
1898	14
1899	5
1900	5
1901	4
1902	16
1903	10
1904	11
1905	10
1906	15
1907	14
1908	20
1909	20
1910	17
1911	7
1912	7
1913	31
1914	28
1915	22
1916	40
1917	52
1918	26
1919	86
1920	50
1921	96
1922	49
1923	130
1924	78
1925	143
1926	185
1927	369
1928	230
1929	85
1930	306
1931	124
1932	484
1933	198
1934	368
1935	259
1936	601
1937	455
1938	394
1939	583
1940	250
1941	689
1942	783
1943	500
1944	288
1945	1,345
1946	810
1947	332
1948	340
1949	178
1950	1,105
1951	489
1952	527
1953	236
1954	365
1955	385
1956	573
1957	327
1958	535
1959	471
1960	814
1961	679
1962	321
1963	738
1964	241
1965	1,115
1966	970
1967	856
1968	849
1969	651
1970	768
1971	361
1972	1,013
1973	943
1974	837
1975	475
1976	534
1977	479
1978	787
1979	507
1980	658
1981	679
1982	1,315
1983	912
1984	599
1985	662
1986	551
1987	1,362
1988	1,325
1989	1,082
1990	1,916
1991	756
1992	740
1993	1,608
1994	822
1995	989
1996	689
1997	895
1998	972
1999	688
2000	792
2001	1,349
2002	1,210
2003	1,244
2004	1,406
2005	1,475
2006	579
2007	1,470
2008	955
2009	717
2010	584
2011	926
2012	2,715
2013	723
2014	1,039
2015	1,145
2016	545
2017	847
2018	891
2019	738
2020	454
2021	502
2022	452
2023	875
2024	668
2025	722
2026	2,522

Download the Data

Data for records on 1973-03-17: 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	731
50 to 100	64
100 to 150	22
150 to 200	10
200 to 250	4
250 to 300	0
300 to 350	0
350 to 400	1