Weather Records on 20 May 1947

358 weather records were set or tied worldwide on 20 May 1947. Highest significance: Houston Wb City, US.

Key Facts for 20 May 1947

On 20 May 1947, 358 weather records were set or tied at long-record stations worldwide.
155 were record highs and 32 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 8 monthly and 350 daily.
Houston Wb City set a daily record precipitation of 105.9 mm (4.2 in) on 20 May 1947.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 456 records.

Record Map

358 stations

358 station records on 20 May 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Houston Wb City	United States	Record daily precipitation	105.9 mm (4.2 in)	55 of 100 (Notable)
Altus Irig Rsch STN	United States	Record daily precipitation	66.3 mm (2.6 in)	41 of 100 (Notable)
Raquette Lake	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Paris Stp	United States	Record daily precipitation	47.8 mm (1.9 in)	33 of 100 (Routine)
Haraiya	India	Record daily precipitation	114.3 mm (4.5 in)	32 of 100 (Routine)
Fredonia	United States	Record daily precipitation	37.3 mm (1.5 in)	31 of 100 (Routine)
Hico	United States	Record daily precipitation	64.8 mm (2.6 in)	30 of 100 (Routine)
Sarita 7 E	United States	Record daily precipitation	77.5 mm (3.1 in)	30 of 100 (Routine)
Sagunbari	India	Record daily precipitation	56.4 mm (2.2 in)	29 of 100 (Routine)
Ghazipur	India	Record daily precipitation	27.4 mm (1.1 in)	29 of 100 (Routine)
Steffenville	United States	Record daily precipitation	71.1 mm (2.8 in)	29 of 100 (Routine)
Cananeia G4-001	Brazil	Record daily precipitation	88.2 mm (3.5 in)	28 of 100 (Routine)
Ricardo	United States	Record daily precipitation	68.8 mm (2.7 in)	27 of 100 (Routine)
Islampur	India	Record daily precipitation	38.1 mm (1.5 in)	26 of 100 (Routine)
Tiger Creek Ph	United States	Record high maximum temperature	33.9 C (93.0 F)	26 of 100 (Routine)
Moran	United States	Record daily precipitation	43.7 mm (1.7 in)	26 of 100 (Routine)
Wayne	United States	Record daily precipitation	47.8 mm (1.9 in)	26 of 100 (Routine)
Mt Clemens Ang Base	United States	Record daily precipitation	34.5 mm (1.4 in)	26 of 100 (Routine)
Cheyenne Wells 2NE	United States	Record daily precipitation	27.9 mm (1.1 in)	25 of 100 (Routine)
Cuero	United States	Record daily precipitation	41.1 mm (1.6 in)	25 of 100 (Routine)
Goilkera	India	Record daily precipitation	27.4 mm (1.1 in)	24 of 100 (Routine)
Muhammadabad	India	Record daily precipitation	47.8 mm (1.9 in)	24 of 100 (Routine)
San Carlos Rsvr	United States	Record high minimum temperature	19.4 C (66.9 F)	24 of 100 (Routine)
Houma	United States	Record daily precipitation	90.9 mm (3.6 in)	24 of 100 (Routine)
Westminster 2 SSE	United States	Record daily precipitation	29.7 mm (1.2 in)	24 of 100 (Routine)
Rosedale	United States	Record daily precipitation	50.8 mm (2.0 in)	24 of 100 (Routine)
North Lake	United States	Record daily precipitation	33.3 mm (1.3 in)	24 of 100 (Routine)
Carthage	United States	Record daily precipitation	41.1 mm (1.6 in)	24 of 100 (Routine)
Rio Grande City	United States	Record daily precipitation	25.9 mm (1.0 in)	24 of 100 (Routine)
Bundaberg Post Office	Australia	Record high minimum temperature	20.7 C (69.3 F)	23 of 100 (Routine)
Newman	United States	Record high maximum temperature	40.0 C (104.0 F)	23 of 100 (Routine)
Wellington	United States	Record daily precipitation	48.3 mm (1.9 in)	23 of 100 (Routine)
Banner Elk	United States	Record high minimum temperature	18.3 C (64.9 F)	23 of 100 (Routine)
Weldon	United States	Record high minimum temperature	21.7 C (71.1 F)	23 of 100 (Routine)
Tishomingo Natl Wr	United States	Record daily precipitation	49.5 mm (1.9 in)	23 of 100 (Routine)
Phaltan	India	Record daily precipitation	29.5 mm (1.2 in)	22 of 100 (Routine)
Appleton City	United States	Record daily precipitation	39.4 mm (1.6 in)	22 of 100 (Routine)
Ashland	United States	Record high minimum temperature	21.7 C (71.1 F)	22 of 100 (Routine)
Pachamba	India	Record daily precipitation	28.7 mm (1.1 in)	21 of 100 (Routine)
Ranchi	India	Record daily precipitation	26.7 mm (1.1 in)	21 of 100 (Routine)
Karanjia	India	Record daily precipitation	41.4 mm (1.6 in)	21 of 100 (Routine)
Oroville 1 N	United States	Record high maximum temperature	38.9 C (102.0 F)	21 of 100 (Routine)
Franklin 3 NW	United States	Record daily precipitation	104.6 mm (4.1 in)	21 of 100 (Routine)
Williamstown	United States	Record high minimum temperature	16.7 C (62.1 F)	21 of 100 (Routine)
Lamar 7N	United States	Record low maximum temperature	16.1 C (61.0 F)	21 of 100 (Routine)
Hanover	United States	Record daily precipitation	45.0 mm (1.8 in)	21 of 100 (Routine)
Graham	United States	Record daily precipitation	25.4 mm (1.0 in)	21 of 100 (Routine)
Lafayette Rgnl AP	United States	Record daily precipitation	79.5 mm (3.1 in)	21 of 100 (Routine)
Rasra	India	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Nogales	United States	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Pakribarwan	India	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Deogaon Lalganj	India	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Sandy Cape Lighthouse	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Pinsk	Belarus	Record daily precipitation	13.3 mm (0.5 in)	20 of 100 (Routine)
Maple Creek	Canada	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Patna Obsy	India	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Ageon	India	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Neshaminy Falls	United States	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Woodford Post Office	Australia	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Bella Coola	Canada	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)

Counts by Type and Timescale

358 records

Records set or tied on 20 May 1947 by type: Highest daily maximum 64, Lowest daily maximum 22, Highest daily minimum 91, Lowest daily minimum 10, Heaviest daily rainfall 171.

Records on 20 May 1947 by type
Record type	Records
Highest daily maximum	64
Lowest daily maximum	22
Highest daily minimum	91
Lowest daily minimum	10
Heaviest daily rainfall	171
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 May 1947 by timescale: all-time 0, monthly 8, daily 350.

How Much Records Were Beaten By

310 broken records

Margins by which the 310 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 71.6. Ties are not counted.

Top 20 by Significance

20 May 1947

Top 20 records on 20 May 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1947	Houston Wb City, US	daily rain	105.9 mm (4.2 in)	71.6 mm (2.8 in)	61 years	55 of 100 (Notable)
20 May 1947	Altus Irig Rsch STN, US	daily rain	66.3 mm (2.6 in)	37.6 mm (1.5 in)	32 years	41 of 100 (Notable)
20 May 1947	Raquette Lake, US	monthly rain	50.8 mm (2.0 in)	8.1 mm (0.32 in)	37 years	37 of 100 (Notable)
20 May 1947	Paris Stp, US	daily rain	47.8 mm (1.9 in)	26.0 mm (1.0 in)	28 years	33 of 100 (Routine)
20 May 1947	Haraiya, IN	monthly rain	114.3 mm (4.5 in)	17.3 mm (0.7 in)	20 years	32 of 100 (Routine)
20 May 1947	Fredonia, US	daily rain	37.3 mm (1.5 in)	19.5 mm (0.8 in)	44 years	31 of 100 (Routine)
20 May 1947	Hico, US	daily rain	64.8 mm (2.6 in)	33.6 mm (1.3 in)	29 years	30 of 100 (Routine)
20 May 1947	Sarita 7 E, US	daily rain	77.5 mm (3.1 in)	36.9 mm (1.5 in)	36 years	30 of 100 (Routine)
20 May 1947	Sagunbari, IN	daily rain	56.4 mm (2.2 in)	35.1 mm (1.4 in)	0 years	29 of 100 (Routine)
20 May 1947	Ghazipur, IN	daily rain	27.4 mm (1.1 in)	15.2 mm (0.6 in)	33 years	29 of 100 (Routine)
20 May 1947	Steffenville, US	daily rain	71.1 mm (2.8 in)	13.7 mm (0.5 in)	47 years	29 of 100 (Routine)
20 May 1947	Cananeia G4-001, BR	monthly rain	88.2 mm (3.5 in)	8.0 mm (0.31 in)	27 years	28 of 100 (Routine)
20 May 1947	Ricardo, US	daily rain	68.8 mm (2.7 in)	53.6 mm (2.1 in)	22 years	27 of 100 (Routine)
20 May 1947	Islampur, IN	daily rain	38.1 mm (1.5 in)	27.9 mm (1.1 in)	32 years	26 of 100 (Routine)
20 May 1947	Tiger Creek Ph, US	monthly high max	33.9 C (93.0 F)	0.6 C (1.1 F)	36 years	26 of 100 (Routine)
20 May 1947	Moran, US	daily rain	43.7 mm (1.7 in)	18.3 mm (0.7 in)	36 years	26 of 100 (Routine)
20 May 1947	Wayne, US	daily rain	47.8 mm (1.9 in)	19.6 mm (0.8 in)	0 years	26 of 100 (Routine)
20 May 1947	Mt Clemens Ang Base, US	daily rain	34.5 mm (1.4 in)	13.9 mm (0.5 in)	24 years	26 of 100 (Routine)
20 May 1947	Cheyenne Wells 2NE, US	daily rain	27.9 mm (1.1 in)	10.1 mm (0.4 in)	37 years	25 of 100 (Routine)
20 May 1947	Cuero, US	daily rain	41.1 mm (1.6 in)	22.3 mm (0.9 in)	36 years	25 of 100 (Routine)

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

1802 to 1947

Records set or tied on this calendar date in each year from 1802 to 1947. 1947 had 358 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1947-05-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	242
10 to 20	48
20 to 30	12
30 to 40	6
40 to 50	0
50 to 60	1
60 to 70	0
70 to 80	1