Weather Records on 18 May 1966

438 weather records were set or tied worldwide on 18 May 1966. Highest significance: Aracaju, BR.

Key Facts for 18 May 1966

On 18 May 1966, 438 weather records were set or tied at long-record stations worldwide.
158 were record highs and 124 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 428 daily.
Aracaju set a daily record precipitation of 124.5 mm (4.9 in) on 18 May 1966.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 442 records.

Record Map

438 stations

438 station records on 18 May 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Aracaju	Brazil	Record daily precipitation	124.5 mm (4.9 in)	58 of 100 (Notable)
Perpignan	France	Record daily precipitation	58.1 mm (2.3 in)	56 of 100 (Notable)
Pontiac	United States	Record daily precipitation	105.4 mm (4.1 in)	54 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	83.8 mm (3.3 in)	51 of 100 (Notable)
Limoeiro de Anadia	Brazil	Record daily precipitation	70.2 mm (2.8 in)	50 of 100 (Notable)
Soltau	Germany	Record daily precipitation	29.1 mm (1.1 in)	42 of 100 (Notable)
Golconda River	United States	Record daily precipitation	47.0 mm (1.9 in)	42 of 100 (Notable)
Weissenburg	Germany	Record daily precipitation	35.9 mm (1.4 in)	41 of 100 (Notable)
Uppsala_Aut	Sweden	Record high maximum temperature	24.8 C (76.6 F)	40 of 100 (Notable)
Batesville	United States	Record daily precipitation	49.5 mm (1.9 in)	40 of 100 (Notable)
Hohenpeissenberg	Germany	Record daily precipitation	40.3 mm (1.6 in)	39 of 100 (Notable)
Nuwara Eliya	Sri Lanka	Record high maximum temperature	27.3 C (81.1 F)	38 of 100 (Notable)
Edwardsville 2 W	United States	Record daily precipitation	66.8 mm (2.6 in)	38 of 100 (Notable)
Estancia	Brazil	Record daily precipitation	100.3 mm (3.9 in)	37 of 100 (Notable)
Bajramaly	Turkmenistan	Record low maximum temperature	18.6 C (65.5 F)	37 of 100 (Notable)
Kirchdorf/Poel	Germany	Record high minimum temperature	15.5 C (59.9 F)	36 of 100 (Notable)
Niederstotzingen	Germany	Record daily precipitation	51.9 mm (2.0 in)	36 of 100 (Notable)
Paripiranga	Brazil	Record daily precipitation	61.0 mm (2.4 in)	35 of 100 (Notable)
Schwerin	Germany	Record high minimum temperature	15.9 C (60.6 F)	35 of 100 (Notable)
Kaiserslautern	Germany	Record daily precipitation	32.1 mm (1.3 in)	34 of 100 (Routine)
Almaty	Kazakhstan	Record low maximum temperature	5.4 C (41.7 F)	33 of 100 (Routine)
Visby_Flygplats	Sweden	Record high maximum temperature	26.0 C (78.8 F)	33 of 100 (Routine)
Jonkoping	Sweden	Record high maximum temperature	25.7 C (78.3 F)	33 of 100 (Routine)
Macon	United States	Record daily precipitation	28.2 mm (1.1 in)	33 of 100 (Routine)
Cairo River	United States	Record daily precipitation	32.5 mm (1.3 in)	32 of 100 (Routine)
Brownwood 2NE	United States	Record high maximum temperature	40.0 C (104.0 F)	32 of 100 (Routine)
Itaporanga Dajuda	Brazil	Record daily precipitation	65.8 mm (2.6 in)	31 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	29.0 mm (1.1 in)	31 of 100 (Routine)
Ebrach	Germany	Record daily precipitation	26.6 mm (1.0 in)	31 of 100 (Routine)
Laurel 3 W	United States	Record daily precipitation	29.2 mm (1.1 in)	31 of 100 (Routine)
Corinth 5 WSW	United States	Record daily precipitation	41.9 mm (1.6 in)	31 of 100 (Routine)
Lampasas	United States	Record high minimum temperature	23.9 C (75.0 F)	31 of 100 (Routine)
Acu	Brazil	Record daily precipitation	64.2 mm (2.5 in)	30 of 100 (Routine)
Bolton	United States	Record daily precipitation	32.0 mm (1.3 in)	30 of 100 (Routine)
Dialville 2 W	United States	Record high minimum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Temple	United States	Record high minimum temperature	23.9 C (75.0 F)	30 of 100 (Routine)
Frei Paulo	Brazil	Record daily precipitation	40.0 mm (1.6 in)	29 of 100 (Routine)
Vestervig	Denmark	Record high minimum temperature	14.0 C (57.2 F)	29 of 100 (Routine)
Koebenhavn: Landbohojskolen-1	Denmark	Record high minimum temperature	13.2 C (55.8 F)	29 of 100 (Routine)
Augsburg (Sankt Stephan)	Germany	Record daily precipitation	38.9 mm (1.5 in)	29 of 100 (Routine)
Alexandria	United States	Record high minimum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Healdton 3 E	United States	Record high maximum temperature	33.9 C (93.0 F)	29 of 100 (Routine)
Ashwood	United States	Record daily precipitation	25.7 mm (1.0 in)	29 of 100 (Routine)
Dublin 2SE	United States	Record high maximum temperature	37.8 C (100.0 F)	29 of 100 (Routine)
Greenville Kgvl Radio	United States	Record high minimum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Gaddede	Sweden	Record high minimum temperature	8.0 C (46.4 F)	28 of 100 (Routine)
Port Gibson 1 NE	United States	Record high minimum temperature	21.1 C (70.0 F)	28 of 100 (Routine)
Union City	United States	Record daily precipitation	57.9 mm (2.3 in)	28 of 100 (Routine)
Conroe	United States	Record high minimum temperature	23.3 C (73.9 F)	28 of 100 (Routine)
Kerrville	United States	Record high minimum temperature	23.9 C (75.0 F)	28 of 100 (Routine)
Sulphur Springs	United States	Record high minimum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Border 3 N	United States	Record low minimum temperature	-6.7 C (19.9 F)	28 of 100 (Routine)
Cordova AP	United States	Record low maximum temperature	3.9 C (39.0 F)	28 of 100 (Routine)
Peterborough	Canada	Record daily precipitation	31.0 mm (1.2 in)	27 of 100 (Routine)
Bishkek	Kyrgyzstan	Record low maximum temperature	6.8 C (44.2 F)	27 of 100 (Routine)
Decatur	United States	Record daily precipitation	27.2 mm (1.1 in)	27 of 100 (Routine)
Waynesboro 2 S	United States	Record low maximum temperature	21.1 C (70.0 F)	27 of 100 (Routine)
Kellogg	United States	Record low minimum temperature	-2.2 C (28.0 F)	27 of 100 (Routine)
Pana	United States	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
Bolivar Wtr Wks	United States	Record daily precipitation	30.7 mm (1.2 in)	27 of 100 (Routine)

Counts by Type and Timescale

438 records

Records set or tied on 18 May 1966 by type: Highest daily maximum 74, Lowest daily maximum 32, Highest daily minimum 84, Lowest daily minimum 92, Heaviest daily rainfall 155, Heaviest daily snowfall 1.

Records on 18 May 1966 by type
Record type	Records
Highest daily maximum	74
Lowest daily maximum	32
Highest daily minimum	84
Lowest daily minimum	92
Heaviest daily rainfall	155
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 18 May 1966 by timescale: all-time 0, monthly 10, daily 428.

How Much Records Were Beaten By

353 broken records

Margins by which the 353 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 95.3. Ties are not counted.

Top 20 by Significance

18 May 1966

Top 20 records on 18 May 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1966	Aracaju, BR	daily rain	124.5 mm (4.9 in)	95.3 mm (3.8 in)	44 years	58 of 100 (Notable)
18 May 1966	Perpignan, FR	daily rain	58.1 mm (2.3 in)	28.5 mm (1.1 in)	52 years	56 of 100 (Notable)
18 May 1966	Pontiac, US	daily rain	105.4 mm (4.1 in)	41.6 mm (1.6 in)	39 years	54 of 100 (Notable)
18 May 1966	Hillsboro, US	daily rain	83.8 mm (3.3 in)	47.5 mm (1.9 in)	23 years	51 of 100 (Notable)
18 May 1966	Limoeiro de Anadia, BR	daily rain	70.2 mm (2.8 in)	42.9 mm (1.7 in)	53 years	50 of 100 (Notable)
18 May 1966	Soltau, DE	daily rain	29.1 mm (1.1 in)	13.7 mm (0.5 in)	28 years	42 of 100 (Notable)
18 May 1966	Golconda River, US	daily rain	47.0 mm (1.9 in)	22.1 mm (0.9 in)	57 years	42 of 100 (Notable)
18 May 1966	Weissenburg, DE	daily rain	35.9 mm (1.4 in)	20.3 mm (0.8 in)	0 years	41 of 100 (Notable)
18 May 1966	Uppsala_Aut, SE	daily high max	24.8 C (76.6 F)	0.5 C (0.9 F)	103 years	40 of 100 (Notable)
18 May 1966	Batesville, US	daily rain	49.5 mm (1.9 in)	17.7 mm (0.7 in)	74 years	40 of 100 (Notable)
18 May 1966	Hohenpeissenberg, DE	daily rain	40.3 mm (1.6 in)	11.2 mm (0.4 in)	55 years	39 of 100 (Notable)
18 May 1966	Nuwara Eliya, LK	daily high max	27.3 C (81.1 F)	1.6 C (2.9 F)	73 years	38 of 100 (Notable)
18 May 1966	Edwardsville 2 W, US	daily rain	66.8 mm (2.6 in)	33.8 mm (1.3 in)	23 years	38 of 100 (Notable)
18 May 1966	Estancia, BR	daily rain	100.3 mm (3.9 in)	33.5 mm (1.3 in)	44 years	37 of 100 (Notable)
18 May 1966	Bajramaly, TM	daily low max	18.6 C (65.5 F)	7.5 C (13.5 F)	53 years	37 of 100 (Notable)
18 May 1966	Kirchdorf/Poel, DE	daily high min	15.5 C (59.9 F)	1.6 C (2.9 F)	77 years	36 of 100 (Notable)
18 May 1966	Niederstotzingen, DE	monthly rain	51.9 mm (2.0 in)	7.8 mm (0.31 in)	33 years	36 of 100 (Notable)
18 May 1966	Paripiranga, BR	daily rain	61.0 mm (2.4 in)	31.9 mm (1.3 in)	5 years	35 of 100 (Notable)
18 May 1966	Schwerin, DE	daily high min	15.9 C (60.6 F)	2.4 C (4.3 F)	72 years	35 of 100 (Notable)
18 May 1966	Kaiserslautern, DE	daily rain	32.1 mm (1.3 in)	12.9 mm (0.5 in)	7 years	34 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 1966

Records set or tied on this calendar date in each year from 1796 to 1966. 1966 had 438 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 1966-05-18: 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	335
20 to 40	14
40 to 60	3
60 to 80	0
80 to 100	1