Weather Records on 20 April 1957

730 weather records were set or tied worldwide on 20 April 1957. Highest significance: Kottaram, IN.

Key Facts for 20 April 1957

On 20 April 1957, 730 weather records were set or tied at long-record stations worldwide.
462 were record highs and 47 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 25 monthly and 704 daily.
Kottaram set a daily record precipitation of 96.8 mm (3.8 in) on 20 April 1957.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 460 records.

Record Map

730 stations

730 station records on 20 April 1957 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1957: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kottaram	India	Record daily precipitation	96.8 mm (3.8 in)	55 of 100 (Notable)
Mellette 4 W	United States	Record daily precipitation	50.0 mm (2.0 in)	53 of 100 (Notable)
McGregor	United States	Record daily precipitation	199.4 mm (7.9 in)	49 of 100 (Notable)
Baudette	United States	Record daily precipitation	51.8 mm (2.0 in)	47 of 100 (Notable)
Diamantina Lakes	Australia	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Arnett 3NE	United States	Record daily precipitation	60.2 mm (2.4 in)	45 of 100 (Notable)
Wadena 3 S	United States	Record daily precipitation	29.5 mm (1.2 in)	44 of 100 (Notable)
Shawano 2SSW	United States	Record daily precipitation	32.5 mm (1.3 in)	44 of 100 (Notable)
Wheaton	United States	Record daily precipitation	35.6 mm (1.4 in)	43 of 100 (Notable)
Lucknow Station	Australia	Record daily precipitation	28.4 mm (1.1 in)	42 of 100 (Notable)
Sandy Lake Dam Libby	United States	Record daily precipitation	37.8 mm (1.5 in)	40 of 100 (Notable)
Thief River Falls	United States	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Sparta 1 W	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Beardsley	United States	Record daily precipitation	39.4 mm (1.6 in)	38 of 100 (Notable)
Pipestone	United States	Record daily precipitation	42.7 mm (1.7 in)	38 of 100 (Notable)
Post	United States	Record daily precipitation	59.7 mm (2.4 in)	38 of 100 (Notable)
Hobart Muni AP	United States	Record daily precipitation	62.0 mm (2.4 in)	38 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily precipitation	27.7 mm (1.1 in)	37 of 100 (Notable)
Urbana Wrf	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Ganca	Azerbaijan	Record high minimum temperature	15.9 C (60.6 F)	36 of 100 (Notable)
Beatrice	Canada	Record high minimum temperature	11.7 C (53.1 F)	36 of 100 (Notable)
Hamilton	Canada	Record high maximum temperature	27.8 C (82.0 F)	36 of 100 (Notable)
Park Rapids Muni AP	United States	Record daily precipitation	29.5 mm (1.2 in)	36 of 100 (Notable)
Chillicothe	United States	Record daily precipitation	78.7 mm (3.1 in)	35 of 100 (Notable)
Waupaca	United States	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Windorah Post Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	34 of 100 (Routine)
Southampton	Canada	Record high minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Weatherford	United States	Record daily precipitation	55.9 mm (2.2 in)	34 of 100 (Routine)
Ipswich	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Hewitt	United States	Record daily precipitation	82.6 mm (3.3 in)	34 of 100 (Routine)
Viroqua	United States	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Escanaba	United States	Record high maximum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Ignace	Canada	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Lancaster 4 WSW	United States	Record high minimum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
Hillsboro	United States	Record high minimum temperature	18.3 C (64.9 F)	32 of 100 (Routine)
Lake Mills Wwtp	United States	Record high minimum temperature	16.1 C (61.0 F)	32 of 100 (Routine)
Astrakan	Russia	Record high maximum temperature	28.8 C (83.8 F)	31 of 100 (Routine)
Kirksville	United States	Record high minimum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
West Bend	United States	Record high minimum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Aberdeen	United States	Record daily precipitation	34.8 mm (1.4 in)	31 of 100 (Routine)
Tbilisi	Georgia	Record high minimum temperature	14.6 C (58.3 F)	30 of 100 (Routine)
Bradenton Exp STN	United States	Record daily precipitation	45.0 mm (1.8 in)	30 of 100 (Routine)
Marengo	United States	Record high minimum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Lansing	United States	Record daily precipitation	42.2 mm (1.7 in)	30 of 100 (Routine)
Bemidji	United States	Record daily precipitation	26.7 mm (1.1 in)	30 of 100 (Routine)
Beloit	United States	Record high minimum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Neillsville 3ESE	United States	Record daily precipitation	30.0 mm (1.2 in)	30 of 100 (Routine)
Portage Wwtp	United States	Record high minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Wausau Record Herald	United States	Record high minimum temperature	11.1 C (52.0 F)	30 of 100 (Routine)
Monsenhor Tabosa	Brazil	Record daily precipitation	68.5 mm (2.7 in)	29 of 100 (Routine)
Barrie	Canada	Record high minimum temperature	10.6 C (51.1 F)	29 of 100 (Routine)
Parry Sound	Canada	Record high maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Port Dover	Canada	Record high maximum temperature	24.4 C (75.9 F)	29 of 100 (Routine)
Kulasekaram	India	Record daily precipitation	61.0 mm (2.4 in)	29 of 100 (Routine)
Princeton	United States	Record high minimum temperature	20.0 C (68.0 F)	29 of 100 (Routine)
Hale Loud Dam	United States	Record high minimum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Fosston 1 E	United States	Record daily precipitation	32.3 mm (1.3 in)	29 of 100 (Routine)
Smith 1 N	United States	Record daily snowfall	5.1 cm (2.0 in)	29 of 100 (Routine)
Burnett 3 S	United States	Record high minimum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Sucesso	Brazil	Record daily precipitation	67.0 mm (2.6 in)	28 of 100 (Routine)

Counts by Type and Timescale

730 records

Records set or tied on 20 April 1957 by type: Highest daily maximum 117, Lowest daily maximum 39, Highest daily minimum 345, Lowest daily minimum 8, Heaviest daily rainfall 219, Heaviest daily snowfall 2.

Records on 20 April 1957 by type
Record type	Records
Highest daily maximum	117
Lowest daily maximum	39
Highest daily minimum	345
Lowest daily minimum	8
Heaviest daily rainfall	219
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 20 April 1957 by timescale: all-time 1, monthly 25, daily 704.

How Much Records Were Beaten By

595 broken records

Margins by which the 595 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 72.7. Ties are not counted.

Top 20 by Significance

20 April 1957

Top 20 records on 20 April 1957 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1957	Kottaram, IN	daily rain	96.8 mm (3.8 in)	72.7 mm (2.9 in)	36 years	55 of 100 (Notable)
20 April 1957	Mellette 4 W, US	daily rain	50.0 mm (2.0 in)	34.5 mm (1.4 in)	36 years	53 of 100 (Notable)
20 April 1957	McGregor, US	all-time rain	199.4 mm (7.9 in)	33.5 mm (1.3 in)	23 years	49 of 100 (Notable)
20 April 1957	Baudette, US	monthly rain	51.8 mm (2.0 in)	15.5 mm (0.6 in)	19 years	47 of 100 (Notable)
20 April 1957	Diamantina Lakes, AU	daily rain	33.0 mm (1.3 in)	32.2 mm (1.3 in)	65 years	45 of 100 (Notable)
20 April 1957	Arnett 3NE, US	daily rain	60.2 mm (2.4 in)	46.7 mm (1.8 in)	4 years	45 of 100 (Notable)
20 April 1957	Wadena 3 S, US	daily rain	29.5 mm (1.2 in)	25.2 mm (1.0 in)	28 years	44 of 100 (Notable)
20 April 1957	Shawano 2SSW, US	daily rain	32.5 mm (1.3 in)	19.3 mm (0.8 in)	60 years	44 of 100 (Notable)
20 April 1957	Wheaton, US	daily rain	35.6 mm (1.4 in)	21.9 mm (0.9 in)	40 years	43 of 100 (Notable)
20 April 1957	Lucknow Station, AU	daily rain	28.4 mm (1.1 in)	25.9 mm (1.0 in)	36 years	42 of 100 (Notable)
20 April 1957	Sandy Lake Dam Libby, US	daily rain	37.8 mm (1.5 in)	12.9 mm (0.5 in)	63 years	40 of 100 (Notable)
20 April 1957	Thief River Falls, US	daily rain	27.9 mm (1.1 in)	17.2 mm (0.7 in)	36 years	39 of 100 (Notable)
20 April 1957	Sparta 1 W, US	monthly high min	22.8 C (73.0 F)	1.7 C (3.1 F)	64 years	38 of 100 (Notable)
20 April 1957	Beardsley, US	daily rain	39.4 mm (1.6 in)	18.1 mm (0.7 in)	40 years	38 of 100 (Notable)
20 April 1957	Pipestone, US	daily rain	42.7 mm (1.7 in)	21.1 mm (0.8 in)	16 years	38 of 100 (Notable)
20 April 1957	Post, US	daily rain	59.7 mm (2.4 in)	36.8 mm (1.4 in)	34 years	38 of 100 (Notable)
20 April 1957	Hobart Muni AP, US	daily rain	62.0 mm (2.4 in)	37.6 mm (1.5 in)	20 years	38 of 100 (Notable)
20 April 1957	Detroit Lakes 1 NNE, US	daily rain	27.7 mm (1.1 in)	14.5 mm (0.6 in)	40 years	37 of 100 (Notable)
20 April 1957	Urbana Wrf, US	monthly high min	20.0 C (68.0 F)	1.7 C (3.1 F)	61 years	37 of 100 (Notable)
20 April 1957	Ganca, AZ	daily high min	15.9 C (60.6 F)	2.4 C (4.3 F)	74 years	36 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 1957

Records set or tied on this calendar date in each year from 1807 to 1957. 1957 had 730 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 1957-04-20: 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 10	528
10 to 20	40
20 to 30	14
30 to 40	9
40 to 50	2
50 to 60	1
60 to 70	0
70 to 80	1