Weather Records on 18 May 1973

1,233 weather records were set or tied worldwide on 18 May 1973. Highest significance: Zinapecuaro, MX.

Key Facts for 18 May 1973

On 18 May 1973, 1,233 weather records were set or tied at long-record stations worldwide.
273 were record highs and 797 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 23 monthly and 1,209 daily.
Zinapecuaro set an all-time record daily precipitation of 125.0 mm (4.9 in) on 18 May 1973.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

1,233 stations

1,233 station records on 18 May 1973 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1973: highest significance records shown on the map
Station	Country	Type	Value	Significance
Zinapecuaro	Mexico	Record daily precipitation	125.0 mm (4.9 in)	65 of 100 (Major)
Blagovescensk	Russia	Record daily precipitation	25.2 mm (1.0 in)	58 of 100 (Notable)
Lagarto	Brazil	Record daily precipitation	64.0 mm (2.5 in)	54 of 100 (Notable)
Cooperstown	United States	Record daily snowfall	12.7 cm (5.0 in)	54 of 100 (Notable)
Windham 3 E	United States	Record daily precipitation	44.5 mm (1.8 in)	52 of 100 (Notable)
Haleakala Exp Farm 434	United States	Record daily precipitation	53.3 mm (2.1 in)	47 of 100 (Notable)
Apatzingan (Smn)	Mexico	Record daily precipitation	34.8 mm (1.4 in)	46 of 100 (Notable)
Baltimore Customs House	United States	Record low minimum temperature	5.0 C (41.0 F)	46 of 100 (Notable)
Bainbridge 2 E	United States	Record daily snowfall	15.2 cm (6.0 in)	44 of 100 (Notable)
Highmarket 2W	United States	Record daily snowfall	12.7 cm (5.0 in)	44 of 100 (Notable)
Wanakena Rngr School	United States	Record daily snowfall	10.2 cm (4.0 in)	44 of 100 (Notable)
Montrose	United States	Record daily snowfall	11.4 cm (4.5 in)	43 of 100 (Notable)
Atlantic City Marina	United States	Record low minimum temperature	5.0 C (41.0 F)	42 of 100 (Notable)
Apatzingan (Smn)	Mexico	Record high minimum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Shelby 2 NW	United States	Record low minimum temperature	2.2 C (36.0 F)	41 of 100 (Notable)
Tkvarcheli	Georgia	Record daily precipitation	73.6 mm (2.9 in)	40 of 100 (Notable)
Little Falls City Rsch	United States	Record daily precipitation	50.8 mm (2.0 in)	40 of 100 (Notable)
Stillwater Rsvr	United States	Record daily snowfall	12.7 cm (5.0 in)	40 of 100 (Notable)
Greensboro	United States	Record low minimum temperature	7.8 C (46.0 F)	39 of 100 (Notable)
Rocklin	United States	Record high minimum temperature	20.0 C (68.0 F)	39 of 100 (Notable)
Asheville	United States	Record low minimum temperature	1.1 C (34.0 F)	39 of 100 (Notable)
St Tite	Canada	Record daily precipitation	37.3 mm (1.5 in)	38 of 100 (Notable)
Alcove Dam	United States	Record daily precipitation	41.9 mm (1.6 in)	38 of 100 (Notable)
Northville	United States	Record daily precipitation	34.8 mm (1.4 in)	38 of 100 (Notable)
Old Forge	United States	Record low maximum temperature	2.2 C (36.0 F)	38 of 100 (Notable)
Salisbury	United States	Record low minimum temperature	2.2 C (36.0 F)	38 of 100 (Notable)
Hawley 1 E	United States	Record daily precipitation	37.1 mm (1.5 in)	38 of 100 (Notable)
Schenectady	United States	Record low maximum temperature	7.8 C (46.0 F)	38 of 100 (Notable)
Ny City Cntrl Park	United States	Record low minimum temperature	5.0 C (41.0 F)	38 of 100 (Notable)
Uruapan (Smn)	Mexico	Record daily precipitation	38.9 mm (1.5 in)	37 of 100 (Notable)
Florence	United States	Record low minimum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Moncure 3 SE	United States	Record low minimum temperature	1.1 C (34.0 F)	37 of 100 (Notable)
Madison 3NNW	United States	Record low maximum temperature	14.4 C (57.9 F)	37 of 100 (Notable)
Gorlitz	Germany	Record low minimum temperature	1.1 C (34.0 F)	36 of 100 (Notable)
Vladivostok	Russia	Record daily precipitation	41.7 mm (1.6 in)	36 of 100 (Notable)
Lozova	Ukraine	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Monticello	United States	Record low minimum temperature	4.4 C (39.9 F)	36 of 100 (Notable)
Rome	United States	Record low minimum temperature	3.9 C (39.0 F)	36 of 100 (Notable)
Blackleaf	United States	Record high minimum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Canajoharie	United States	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Cooperstown	United States	Record daily precipitation	42.2 mm (1.7 in)	36 of 100 (Notable)
Blowing Rock 1NW	United States	Record low maximum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Monroe 2 SE	United States	Record low minimum temperature	2.2 C (36.0 F)	36 of 100 (Notable)
Charleston 1	United States	Record low maximum temperature	13.3 C (55.9 F)	36 of 100 (Notable)
Morgantown Muni AP	United States	Record low maximum temperature	15.6 C (60.1 F)	36 of 100 (Notable)
Bathurst Gaol	Australia	Record low minimum temperature	-4.8 C (23.4 F)	35 of 100 (Notable)
Livingston	United States	Record low minimum temperature	5.6 C (42.1 F)	35 of 100 (Notable)
Clayton 1 SSW	United States	Record low minimum temperature	-1.1 C (30.0 F)	35 of 100 (Notable)
Tuscola	United States	Record low minimum temperature	1.7 C (35.1 F)	35 of 100 (Notable)
Chinook	United States	Record high minimum temperature	17.2 C (63.0 F)	35 of 100 (Notable)
Peterboro 2 S	United States	Record low maximum temperature	8.3 C (46.9 F)	35 of 100 (Notable)
Indian Mills 2 W	United States	Record low maximum temperature	13.9 C (57.0 F)	35 of 100 (Notable)
Lawrenceville 2 S	United States	Record low maximum temperature	9.4 C (48.9 F)	35 of 100 (Notable)
State College	United States	Record low minimum temperature	0.0 C (32.0 F)	35 of 100 (Notable)
Santuck	United States	Record low minimum temperature	5.0 C (41.0 F)	35 of 100 (Notable)
Murfreesboro 5 N	United States	Record low minimum temperature	2.8 C (37.0 F)	35 of 100 (Notable)
Logan	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Durham	Canada	Record low maximum temperature	7.2 C (45.0 F)	34 of 100 (Routine)
Scottsboro	United States	Record low minimum temperature	2.8 C (37.0 F)	34 of 100 (Routine)
Norfolk 2 SW	United States	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)

Counts by Type and Timescale

1,233 records

Records set or tied on 18 May 1973 by type: Highest daily maximum 111, Lowest daily maximum 249, Highest daily minimum 162, Lowest daily minimum 548, Heaviest daily rainfall 136, Heaviest daily snowfall 21, Deepest snow cover 6.

Records on 18 May 1973 by type
Record type	Records
Highest daily maximum	111
Lowest daily maximum	249
Highest daily minimum	162
Lowest daily minimum	548
Heaviest daily rainfall	136
Heaviest daily snowfall	21
Deepest snow cover	6

Records on 18 May 1973 by timescale: all-time 1, monthly 23, daily 1,209.

How Much Records Were Beaten By

1,017 broken records

Margins by which the 1,017 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

18 May 1973

Top 20 records on 18 May 1973 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1973	Zinapecuaro, MX	all-time rain	125.0 mm (4.9 in)	39.1 mm (1.5 in)	0 years	65 of 100 (Major)
18 May 1973	Blagovescensk, RU	daily rain	25.2 mm (1.0 in)	15.2 mm (0.6 in)	88 years	58 of 100 (Notable)
18 May 1973	Lagarto, BR	daily rain	64.0 mm (2.5 in)	46.0 mm (1.8 in)	32 years	54 of 100 (Notable)
18 May 1973	Cooperstown, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	72 years	54 of 100 (Notable)
18 May 1973	Windham 3 E, US	daily rain	44.5 mm (1.8 in)	19.1 mm (0.8 in)	72 years	52 of 100 (Notable)
18 May 1973	Haleakala Exp Farm 434, US	daily rain	53.3 mm (2.1 in)	44.2 mm (1.7 in)	34 years	47 of 100 (Notable)
18 May 1973	Apatzingan (Smn), MX	daily rain	34.8 mm (1.4 in)	29.5 mm (1.2 in)	34 years	46 of 100 (Notable)
18 May 1973	Baltimore Customs House, US	daily low min	5.0 C (41.0 F)	2.8 C (5.0 F)	97 years	46 of 100 (Notable)
18 May 1973	Bainbridge 2 E, US	monthly snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	28 years	44 of 100 (Notable)
18 May 1973	Highmarket 2W, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	48 years	44 of 100 (Notable)
18 May 1973	Wanakena Rngr School, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	62 years	44 of 100 (Notable)
18 May 1973	Montrose, US	monthly snowfall	11.4 cm (4.5 in)	6.3 cm (2.5 in)	47 years	43 of 100 (Notable)
18 May 1973	Atlantic City Marina, US	daily low min	5.0 C (41.0 F)	1.1 C (2.0 F)	97 years	42 of 100 (Notable)
18 May 1973	Apatzingan (Smn), MX	daily high min	33.3 C (91.9 F)	6.1 C (11.0 F)	44 years	41 of 100 (Notable)
18 May 1973	Shelby 2 NW, US	daily low min	2.2 C (36.0 F)	4.5 C (8.1 F)	77 years	41 of 100 (Notable)
18 May 1973	Tkvarcheli, GE	daily rain	73.6 mm (2.9 in)	37.6 mm (1.5 in)	36 years	40 of 100 (Notable)
18 May 1973	Little Falls City Rsch, US	daily rain	50.8 mm (2.0 in)	19.6 mm (0.8 in)	28 years	40 of 100 (Notable)
18 May 1973	Stillwater Rsvr, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	38 years	40 of 100 (Notable)
18 May 1973	Greensboro, US	daily low min	7.8 C (46.0 F)	3.3 C (5.9 F)	78 years	39 of 100 (Notable)
18 May 1973	Rocklin, US	daily high min	20.0 C (68.0 F)	5.6 C (10.1 F)	52 years	39 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

1796 to 1973

Records set or tied on this calendar date in each year from 1796 to 1973. 1973 had 1,233 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 1973-05-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	982
20 to 40	19
40 to 60	7
60 to 80	1
80 to 100	0
100 to 120	4
120 to 140	4