Weather Records on 18 May 1947

231 weather records were set or tied worldwide on 18 May 1947. Highest significance: Pearsall, US.

Key Facts for 18 May 1947

On 18 May 1947, 231 weather records were set or tied at long-record stations worldwide.
117 were record highs and 18 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 230 daily.
Pearsall set a daily record precipitation of 82.3 mm (3.2 in) on 18 May 1947.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 444 records.

Record Map

231 stations

231 station records on 18 May 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pearsall	United States	Record daily precipitation	82.3 mm (3.2 in)	53 of 100 (Notable)
Schenley Lock 5	United States	Record daily precipitation	47.0 mm (1.9 in)	51 of 100 (Notable)
Liberty	United States	Record daily precipitation	141.0 mm (5.6 in)	41 of 100 (Notable)
Makaweli 965	United States	Record daily precipitation	36.1 mm (1.4 in)	35 of 100 (Notable)
Selinsgrove 2 S	United States	Record daily precipitation	27.4 mm (1.1 in)	30 of 100 (Routine)
Pertabpur	India	Record daily precipitation	31.0 mm (1.2 in)	29 of 100 (Routine)
Hempstead	United States	Record daily precipitation	78.7 mm (3.1 in)	29 of 100 (Routine)
Irikkur	India	Record daily precipitation	94.0 mm (3.7 in)	27 of 100 (Routine)
Clarion 3 SW	United States	Record daily precipitation	26.7 mm (1.1 in)	27 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record high maximum temperature	24.2 C (75.6 F)	26 of 100 (Routine)
Columbus	United States	Record daily precipitation	34.0 mm (1.3 in)	26 of 100 (Routine)
College Park	United States	Record daily precipitation	33.0 mm (1.3 in)	26 of 100 (Routine)
Red Rvr	United States	Record low minimum temperature	-12.2 C (10.0 F)	25 of 100 (Routine)
Napoleon	United States	Record daily precipitation	35.1 mm (1.4 in)	25 of 100 (Routine)
Cannanore	India	Record daily precipitation	75.2 mm (3.0 in)	24 of 100 (Routine)
Boulia Airport	Australia	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Ucluelet	Canada	Record daily precipitation	50.3 mm (2.0 in)	23 of 100 (Routine)
Wheatfield	United States	Record daily precipitation	37.8 mm (1.5 in)	23 of 100 (Routine)
Waverly	United States	Record high minimum temperature	20.0 C (68.0 F)	23 of 100 (Routine)
Uniontown 1 NE	United States	Record daily precipitation	32.5 mm (1.3 in)	23 of 100 (Routine)
Bluefield 2 NW	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Kahuku 912	United States	Record high maximum temperature	30.0 C (86.0 F)	23 of 100 (Routine)
Houston Wb City	United States	Record daily precipitation	81.5 mm (3.2 in)	23 of 100 (Routine)
Lancaster 2 NW	United States	Record daily precipitation	41.9 mm (1.6 in)	22 of 100 (Routine)
Sealy	United States	Record daily precipitation	54.6 mm (2.1 in)	22 of 100 (Routine)
Point Pleasant	United States	Record high minimum temperature	20.0 C (68.0 F)	22 of 100 (Routine)
Cobar Post Office	Australia	Record high minimum temperature	16.7 C (62.1 F)	21 of 100 (Routine)
Millen 4 N	United States	Record high maximum temperature	35.6 C (96.1 F)	21 of 100 (Routine)
Altoona Horseshoe Curv	United States	Record daily precipitation	32.5 mm (1.3 in)	21 of 100 (Routine)
Schwerin	Germany	Record daily precipitation	14.1 mm (0.6 in)	20 of 100 (Routine)
Nikolskoye/Beringa Ostrov	Russia	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Grove Farm 1021	United States	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Vytegra	Russia	Record daily precipitation	7.8 mm (0.31 in)	20 of 100 (Routine)
Montreal McGill	Canada	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Greensburg 2 S	United States	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Przhevalsk	Kyrgyzstan	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Coen Post Office	Australia	Record daily precipitation	2.0 mm (0.08 in)	20 of 100 (Routine)
New Westminster	Canada	Record daily precipitation	32.3 mm (1.3 in)	20 of 100 (Routine)
Frankfort Downtown	United States	Record high minimum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Maysville Wwtp	United States	Record high minimum temperature	19.4 C (66.9 F)	20 of 100 (Routine)
St John Bethlehem Aca	United States	Record high minimum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Waxahachie	United States	Record high minimum temperature	22.8 C (73.0 F)	20 of 100 (Routine)
Shawano 2SSW	United States	Record high maximum temperature	26.7 C (80.1 F)	20 of 100 (Routine)
Geraldton Town	Australia	Record low minimum temperature	3.7 C (38.7 F)	19 of 100 (Routine)
Kuranda Railway Station	Australia	Record daily precipitation	38.1 mm (1.5 in)	19 of 100 (Routine)
Cooyar Post Office	Australia	Record daily precipitation	9.9 mm (0.39 in)	19 of 100 (Routine)
Nicholson (Yendalock)	Australia	Record daily precipitation	14.0 mm (0.6 in)	19 of 100 (Routine)
Sherbrooke	Canada	Record daily precipitation	18.5 mm (0.7 in)	19 of 100 (Routine)
Paud	India	Record daily precipitation	23.9 mm (0.9 in)	19 of 100 (Routine)
Jejuri	India	Record daily precipitation	5.1 mm (0.20 in)	19 of 100 (Routine)
Ketty	India	Record daily precipitation	34.3 mm (1.4 in)	19 of 100 (Routine)
Newman	United States	Record high maximum temperature	37.2 C (99.0 F)	19 of 100 (Routine)
Brownwood 2NE	United States	Record daily precipitation	53.3 mm (2.1 in)	19 of 100 (Routine)
Lufkin Angelina Co AP	United States	Record daily precipitation	61.0 mm (2.4 in)	19 of 100 (Routine)
Tashkent	Uzbekistan	Record low maximum temperature	20.5 C (68.9 F)	19 of 100 (Routine)
Hagerstown 1E	United States	Record daily precipitation	18.5 mm (0.7 in)	18 of 100 (Routine)
Monroe	United States	Record daily precipitation	21.8 mm (0.9 in)	18 of 100 (Routine)
Summerfield 2 NE	United States	Record daily precipitation	31.0 mm (1.2 in)	18 of 100 (Routine)
Conway	United States	Record high maximum temperature	35.0 C (95.0 F)	18 of 100 (Routine)
Encinal	United States	Record daily precipitation	45.2 mm (1.8 in)	18 of 100 (Routine)

Counts by Type and Timescale

231 records

Records set or tied on 18 May 1947 by type: Highest daily maximum 46, Lowest daily maximum 7, Highest daily minimum 71, Lowest daily minimum 11, Heaviest daily rainfall 96.

Records on 18 May 1947 by type
Record type	Records
Highest daily maximum	46
Lowest daily maximum	7
Highest daily minimum	71
Lowest daily minimum	11
Heaviest daily rainfall	96
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 May 1947 by timescale: all-time 0, monthly 1, daily 230.

How Much Records Were Beaten By

159 broken records

Margins by which the 159 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 78.8. Ties are not counted.

Top 20 by Significance

18 May 1947

Top 20 records on 18 May 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1947	Pearsall, US	daily rain	82.3 mm (3.2 in)	71.1 mm (2.8 in)	32 years	53 of 100 (Notable)
18 May 1947	Schenley Lock 5, US	daily rain	47.0 mm (1.9 in)	26.4 mm (1.0 in)	52 years	51 of 100 (Notable)
18 May 1947	Liberty, US	daily rain	141.0 mm (5.6 in)	78.8 mm (3.1 in)	30 years	41 of 100 (Notable)
18 May 1947	Makaweli 965, US	daily rain	36.1 mm (1.4 in)	18.3 mm (0.7 in)	36 years	35 of 100 (Notable)
18 May 1947	Selinsgrove 2 S, US	daily rain	27.4 mm (1.1 in)	12.7 mm (0.5 in)	47 years	30 of 100 (Routine)
18 May 1947	Pertabpur, IN	daily rain	31.0 mm (1.2 in)	17.0 mm (0.7 in)	21 years	29 of 100 (Routine)
18 May 1947	Hempstead, US	daily rain	78.7 mm (3.1 in)	45.2 mm (1.8 in)	17 years	29 of 100 (Routine)
18 May 1947	Irikkur, IN	daily rain	94.0 mm (3.7 in)	32.5 mm (1.3 in)	42 years	27 of 100 (Routine)
18 May 1947	Clarion 3 SW, US	daily rain	26.7 mm (1.1 in)	6.4 mm (0.25 in)	47 years	27 of 100 (Routine)
18 May 1947	Sydney (Observatory Hill), AU	daily high max	24.2 C (75.6 F)	0.1 C (0.2 F)	60 years	26 of 100 (Routine)
18 May 1947	Columbus, US	daily rain	34.0 mm (1.3 in)	13.2 mm (0.5 in)	26 years	26 of 100 (Routine)
18 May 1947	College Park, US	daily rain	33.0 mm (1.3 in)	7.6 mm (0.30 in)	47 years	26 of 100 (Routine)
18 May 1947	Red Rvr, US	daily low min	-12.2 C (10.0 F)	5.5 C (9.9 F)	16 years	25 of 100 (Routine)
18 May 1947	Napoleon, US	daily rain	35.1 mm (1.4 in)	17.3 mm (0.7 in)	8 years	25 of 100 (Routine)
18 May 1947	Cannanore, IN	daily rain	75.2 mm (3.0 in)	27.2 mm (1.1 in)	42 years	24 of 100 (Routine)
18 May 1947	Boulia Airport, AU	daily high min	22.8 C (73.0 F)	3.4 C (6.1 F)	32 years	23 of 100 (Routine)
18 May 1947	Ucluelet, CA	daily rain	50.3 mm (2.0 in)	21.9 mm (0.9 in)	12 years	23 of 100 (Routine)
18 May 1947	Wheatfield, US	daily rain	37.8 mm (1.5 in)	11.9 mm (0.5 in)	26 years	23 of 100 (Routine)
18 May 1947	Waverly, US	daily high min	20.0 C (68.0 F)	1.7 C (3.1 F)	52 years	23 of 100 (Routine)
18 May 1947	Uniontown 1 NE, US	daily rain	32.5 mm (1.3 in)	5.1 mm (0.20 in)	42 years	23 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

1796 to 1947

Records set or tied on this calendar date in each year from 1796 to 1947. 1947 had 231 records.

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

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 1947-05-18: 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	136
10 to 20	14
20 to 30	5
30 to 40	1
40 to 50	1
50 to 60	0
60 to 70	0
70 to 80	2