Weather Records on 20 April 1973

982 weather records were set or tied worldwide on 20 April 1973. Highest significance: Miles City, US.

Key Facts for 20 April 1973

On 20 April 1973, 982 weather records were set or tied at long-record stations worldwide.
342 were record highs and 143 were record lows, counting maximum and minimum temperature.
By timescale, 15 were all-time records, 43 monthly and 924 daily.
Miles City set a daily record precipitation of 32.8 mm (1.3 in) on 20 April 1973.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 459 records.

Record Map

982 stations

982 station records on 20 April 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Miles City	United States	Record daily precipitation	32.8 mm (1.3 in)	71 of 100 (Major)
Kaycee	United States	Record daily precipitation	33.0 mm (1.3 in)	67 of 100 (Major)
Saint Charles	United States	Record daily precipitation	233.2 mm (9.2 in)	66 of 100 (Major)
Bridger 2 N	United States	Record daily snowfall	53.3 cm (21.0 in)	65 of 100 (Major)
Bolivar Wtr Wks	United States	Record daily precipitation	112.3 mm (4.4 in)	64 of 100 (Major)
Jackson Exp STN	United States	Record daily precipitation	129.0 mm (5.1 in)	64 of 100 (Major)
Majors Creek (the Old School)	Australia	Record daily precipitation	66.0 mm (2.6 in)	63 of 100 (Major)
Desterro Do Melo	Brazil	Record daily precipitation	200.5 mm (7.9 in)	63 of 100 (Major)
Amity	United States	Record daily precipitation	112.3 mm (4.4 in)	62 of 100 (Major)
Ft Benton	United States	Record daily precipitation	46.2 mm (1.8 in)	62 of 100 (Major)
Shoshoni	United States	Record daily snowfall	34.3 cm (13.5 in)	61 of 100 (Major)
Great Falls AP	United States	Record daily snowfall	41.9 cm (16.5 in)	61 of 100 (Major)
Golconda River	United States	Record daily precipitation	104.1 mm (4.1 in)	60 of 100 (Major)
Bridger 2 N	United States	Record daily precipitation	52.3 mm (2.1 in)	60 of 100 (Major)
Grass Range	United States	Record daily snowfall	30.5 cm (12.0 in)	60 of 100 (Major)
Crow Agency	United States	Record daily precipitation	67.6 mm (2.7 in)	59 of 100 (Notable)
Huntley Exp STN	United States	Record daily precipitation	28.4 mm (1.1 in)	59 of 100 (Notable)
Melstone	United States	Record daily precipitation	62.2 mm (2.4 in)	58 of 100 (Notable)
Jonesboro 3 SSE	United States	Record daily precipitation	88.9 mm (3.5 in)	57 of 100 (Notable)
Lame Deer	United States	Record daily precipitation	73.7 mm (2.9 in)	57 of 100 (Notable)
Wyola 1 SW	United States	Record daily snowfall	50.8 cm (20.0 in)	57 of 100 (Notable)
Saint Johns	United States	Record daily snowfall	20.3 cm (8.0 in)	56 of 100 (Notable)
Georgetown	United States	Record daily precipitation	105.4 mm (4.1 in)	55 of 100 (Notable)
Columbus	United States	Record daily precipitation	44.5 mm (1.8 in)	55 of 100 (Notable)
Covington 3 SW	United States	Record daily precipitation	142.7 mm (5.6 in)	55 of 100 (Notable)
Nephi	United States	Record daily snowfall	14.0 cm (5.5 in)	55 of 100 (Notable)
Crow Agency	United States	Record snow depth	48.3 cm (19.0 in)	54 of 100 (Notable)
Billings Wtp	United States	Record daily precipitation	30.5 mm (1.2 in)	53 of 100 (Notable)
Marble Hill	United States	Record daily precipitation	79.8 mm (3.1 in)	52 of 100 (Notable)
Sheridan Fld STN	United States	Record daily snowfall	25.4 cm (10.0 in)	52 of 100 (Notable)
Stuttgart 9 ESE	United States	Record daily precipitation	108.0 mm (4.3 in)	51 of 100 (Notable)
Cascade 5 S	United States	Record daily snowfall	43.2 cm (17.0 in)	51 of 100 (Notable)
Flatwillow 4 ENE	United States	Record daily snowfall	25.4 cm (10.0 in)	50 of 100 (Notable)
Winifred	United States	Record daily precipitation	45.0 mm (1.8 in)	49 of 100 (Notable)
Milan Exp STN	United States	Record daily precipitation	104.1 mm (4.1 in)	49 of 100 (Notable)
Midwest	United States	Record daily snowfall	40.6 cm (16.0 in)	49 of 100 (Notable)
Hernando	United States	Record daily precipitation	90.9 mm (3.6 in)	48 of 100 (Notable)
Kaycee	United States	Record daily snowfall	45.7 cm (18.0 in)	48 of 100 (Notable)
Brady Aznoe	United States	Record daily snowfall	25.4 cm (10.0 in)	47 of 100 (Notable)
Forsyth 2 E	United States	Record daily precipitation	36.1 mm (1.4 in)	47 of 100 (Notable)
Melstone	United States	Record snow depth	33.0 cm (13.0 in)	47 of 100 (Notable)
Boughton	United States	Record daily precipitation	104.1 mm (4.1 in)	46 of 100 (Notable)
Ft Benton	United States	Record daily snowfall	43.2 cm (17.0 in)	46 of 100 (Notable)
Mildred	United States	Record daily precipitation	40.1 mm (1.6 in)	46 of 100 (Notable)
Norris Madison Pwr House	United States	Record snow depth	68.6 cm (27.0 in)	46 of 100 (Notable)
Bowman	United States	Record daily precipitation	32.8 mm (1.3 in)	46 of 100 (Notable)
Sarah 3 SE	United States	Record daily precipitation	135.9 mm (5.4 in)	45 of 100 (Notable)
Big Sandy	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Red Lodge	United States	Record snow depth	91.4 cm (36.0 in)	45 of 100 (Notable)
Wimbledon	South Africa	Record daily precipitation	28.5 mm (1.1 in)	44 of 100 (Notable)
Sweet Springs	United States	Record daily precipitation	82.3 mm (3.2 in)	44 of 100 (Notable)
Conrad	United States	Record daily snowfall	10.2 cm (4.0 in)	44 of 100 (Notable)
Roy 8 NE	United States	Record daily precipitation	48.0 mm (1.9 in)	44 of 100 (Notable)
Great Falls AP	United States	Record daily precipitation	42.9 mm (1.7 in)	44 of 100 (Notable)
Hughton	Canada	Record daily snowfall	12.7 cm (5.0 in)	43 of 100 (Notable)
Brookport Dam 52	United States	Record daily precipitation	87.9 mm (3.5 in)	43 of 100 (Notable)
Kaycee	United States	Record snow depth	50.8 cm (20.0 in)	43 of 100 (Notable)
Klintonel	Canada	Record daily snowfall	30.5 cm (12.0 in)	42 of 100 (Notable)
Port Stanley	Canada	Record high minimum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Rooipoort	South Africa	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)

Counts by Type and Timescale

982 records

Records set or tied on 20 April 1973 by type: Highest daily maximum 95, Lowest daily maximum 104, Highest daily minimum 247, Lowest daily minimum 39, Heaviest daily rainfall 409, Heaviest daily snowfall 68, Deepest snow cover 20.

Records on 20 April 1973 by type
Record type	Records
Highest daily maximum	95
Lowest daily maximum	104
Highest daily minimum	247
Lowest daily minimum	39
Heaviest daily rainfall	409
Heaviest daily snowfall	68
Deepest snow cover	20

Records on 20 April 1973 by timescale: all-time 15, monthly 43, daily 924.

How Much Records Were Beaten By

803 broken records

Margins by which the 803 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 483.0. Ties are not counted.

Top 20 by Significance

20 April 1973

Top 20 records on 20 April 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1973	Miles City, US	daily rain	32.8 mm (1.3 in)	25.2 mm (1.0 in)	77 years	71 of 100 (Major)
20 April 1973	Kaycee, US	daily rain	33.0 mm (1.3 in)	23.1 mm (0.9 in)	68 years	67 of 100 (Major)
20 April 1973	Saint Charles, US	all-time rain	233.2 mm (9.2 in)	81.3 mm (3.2 in)	7 years	66 of 100 (Major)
20 April 1973	Bridger 2 N, US	all-time snowfall	53.3 cm (21.0 in)	20.3 cm (8.0 in)	17 years	65 of 100 (Major)
20 April 1973	Bolivar Wtr Wks, US	daily rain	112.3 mm (4.4 in)	74.7 mm (2.9 in)	55 years	64 of 100 (Major)
20 April 1973	Jackson Exp STN, US	daily rain	129.0 mm (5.1 in)	92.2 mm (3.6 in)	55 years	64 of 100 (Major)
20 April 1973	Majors Creek (the Old School), AU	daily rain	66.0 mm (2.6 in)	52.8 mm (2.1 in)	60 years	63 of 100 (Major)
20 April 1973	Desterro Do Melo, BR	all-time rain	200.5 mm (7.9 in)	71.5 mm (2.8 in)	0 years	63 of 100 (Major)
20 April 1973	Amity, US	daily rain	112.3 mm (4.4 in)	72.9 mm (2.9 in)	56 years	62 of 100 (Major)
20 April 1973	Ft Benton, US	monthly rain	46.2 mm (1.8 in)	16.2 mm (0.6 in)	29 years	62 of 100 (Major)
20 April 1973	Shoshoni, US	all-time snowfall	34.3 cm (13.5 in)	14.0 cm (5.5 in)	32 years	61 of 100 (Major)
20 April 1973	Great Falls AP, US	all-time snowfall	41.9 cm (16.5 in)	14.0 cm (5.5 in)	22 years	61 of 100 (Major)
20 April 1973	Golconda River, US	daily rain	104.1 mm (4.1 in)	44.9 mm (1.8 in)	64 years	60 of 100 (Major)
20 April 1973	Bridger 2 N, US	daily rain	52.3 mm (2.1 in)	43.9 mm (1.7 in)	44 years	60 of 100 (Major)
20 April 1973	Grass Range, US	daily snowfall	30.5 cm (12.0 in)	30.5 cm (12.0 in)	58 years	60 of 100 (Major)
20 April 1973	Crow Agency, US	daily rain	67.6 mm (2.7 in)	57.4 mm (2.3 in)	40 years	59 of 100 (Notable)
20 April 1973	Huntley Exp STN, US	daily rain	28.4 mm (1.1 in)	20.0 mm (0.8 in)	52 years	59 of 100 (Notable)
20 April 1973	Melstone, US	monthly rain	62.2 mm (2.4 in)	35.5 mm (1.4 in)	8 years	58 of 100 (Notable)
20 April 1973	Jonesboro 3 SSE, US	daily rain	88.9 mm (3.5 in)	46.5 mm (1.8 in)	56 years	57 of 100 (Notable)
20 April 1973	Lame Deer, US	monthly rain	73.7 mm (2.9 in)	34.8 mm (1.4 in)	0 years	57 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

1807 to 1973

Records set or tied on this calendar date in each year from 1807 to 1973. 1973 had 982 records.

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

Records on 04-20 in each year
Year	Records
1807	3
1817	1
1838	1
1849	2
1851	1
1852	4
1854	1
1858	1
1860	1
1864	1
1865	3
1868	1
1869	1
1870	1
1872	1
1874	3
1875	4
1876	1
1878	2
1880	2
1881	2
1884	1
1885	1
1886	2
1889	1
1891	2
1892	1
1893	6
1894	8
1895	7
1896	3
1897	6
1898	1
1899	1
1901	8
1902	3
1903	14
1904	31
1905	9
1906	12
1907	18
1908	14
1909	22
1910	25
1911	18
1912	12
1913	19
1914	46
1915	45
1916	19
1917	33
1918	42
1919	17
1920	49
1921	27
1922	40
1923	157
1924	113
1925	169
1926	310
1927	442
1928	212
1929	182
1930	87
1931	255
1932	166
1933	279
1934	384
1935	384
1936	311
1937	427
1938	339
1939	158
1940	519
1941	558
1942	223
1943	670
1944	304
1945	391
1946	395
1947	308
1948	493
1949	477
1950	329
1951	690
1952	552
1953	1,071
1954	377
1955	623
1956	384
1957	730
1958	327
1959	563
1960	472
1961	1,078
1962	487
1963	595
1964	749
1965	724
1966	1,174
1967	864
1968	975
1969	382
1970	948
1971	765
1972	531
1973	982
1974	673
1975	344
1976	661
1977	693
1978	800
1979	495
1980	1,539
1981	706
1982	906
1983	1,844
1984	922
1985	1,140
1986	770
1987	1,447
1988	1,144
1989	1,187
1990	1,495
1991	1,075
1992	1,009
1993	772
1994	756
1995	1,351
1996	970
1997	833
1998	1,490
1999	674
2000	931
2001	752
2002	1,081
2003	758
2004	567
2005	707
2006	859
2007	582
2008	1,110
2009	845
2010	693
2011	1,477
2012	726
2013	1,520
2014	384
2015	702
2016	650
2017	734
2018	1,309
2019	1,019
2020	449
2021	1,215
2022	596
2023	828
2024	673
2025	836
2026	533

Download the Data

Data for records on 1973-04-20: 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	776
100 to 200	13
200 to 300	8
300 to 400	3
400 to 500	3