Weather Records on 18 May 1970

703 weather records were set or tied worldwide on 18 May 1970. Highest significance: Sivaganga, IN.

Key Facts for 18 May 1970

On 18 May 1970, 703 weather records were set or tied at long-record stations worldwide.
330 were record highs and 237 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 693 daily.
Sivaganga set a daily record precipitation of 60.0 mm (2.4 in) on 18 May 1970.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 441 records.

Record Map

703 stations

703 station records on 18 May 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sivaganga	India	Record daily precipitation	60.0 mm (2.4 in)	55 of 100 (Notable)
Alger-Dar El Beida	Algeria	Record daily precipitation	50.0 mm (2.0 in)	50 of 100 (Notable)
Dunderlandsdalen	Norway	Record daily precipitation	28.7 mm (1.1 in)	49 of 100 (Notable)
Port Aux Basques	Canada	Record daily precipitation	39.1 mm (1.5 in)	46 of 100 (Notable)
Moosehead	United States	Record daily precipitation	46.0 mm (1.8 in)	45 of 100 (Notable)
Southbridge 3 SW	United States	Record daily precipitation	46.2 mm (1.8 in)	45 of 100 (Notable)
Zhitckovichi	Belarus	Record daily precipitation	31.2 mm (1.2 in)	44 of 100 (Notable)
Morekulam	India	Record daily precipitation	70.4 mm (2.8 in)	44 of 100 (Notable)
Krasnaja_Gora	Russia	Record daily precipitation	25.7 mm (1.0 in)	44 of 100 (Notable)
Pinkham Notch	United States	Record daily precipitation	49.8 mm (2.0 in)	43 of 100 (Notable)
Brocken	Germany	Record snow depth	120.0 cm (47.2 in)	42 of 100 (Notable)
Hardwick	United States	Record daily precipitation	44.5 mm (1.8 in)	42 of 100 (Notable)
Petersham 3 N	United States	Record daily precipitation	47.0 mm (1.9 in)	42 of 100 (Notable)
Keene	United States	Record daily precipitation	38.4 mm (1.5 in)	42 of 100 (Notable)
Ellsworth	United States	Record daily precipitation	59.4 mm (2.3 in)	41 of 100 (Notable)
Lakeport 2	United States	Record daily precipitation	45.0 mm (1.8 in)	41 of 100 (Notable)
Ramanathapuram	India	Record daily precipitation	54.6 mm (2.1 in)	40 of 100 (Notable)
Blue Hill Coop	United States	Record daily precipitation	49.3 mm (1.9 in)	39 of 100 (Notable)
Newburyport	United States	Record daily precipitation	45.5 mm (1.8 in)	39 of 100 (Notable)
Marquette	United States	Record high minimum temperature	12.2 C (54.0 F)	38 of 100 (Notable)
Bulken	Norway	Record daily precipitation	31.8 mm (1.3 in)	36 of 100 (Notable)
Nord-Rana	Norway	Record daily precipitation	35.7 mm (1.4 in)	36 of 100 (Notable)
Orono	United States	Record daily precipitation	40.4 mm (1.6 in)	36 of 100 (Notable)
Mansfield	United States	Record daily precipitation	37.3 mm (1.5 in)	36 of 100 (Notable)
Mission 4 W	United States	Record low minimum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Middleton	United States	Record daily precipitation	46.2 mm (1.8 in)	35 of 100 (Notable)
Raleigh State UNIV	United States	Record low minimum temperature	7.8 C (46.0 F)	35 of 100 (Notable)
Tenosique (Smn)	Mexico	Record low minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)
Groton	United States	Record daily precipitation	33.0 mm (1.3 in)	34 of 100 (Routine)
Clinton 2 S	United States	Record low minimum temperature	6.1 C (43.0 F)	33 of 100 (Routine)
Ashland	United States	Record low minimum temperature	3.3 C (37.9 F)	32 of 100 (Routine)
Middlesboro Fire Dept	United States	Record low minimum temperature	2.2 C (36.0 F)	32 of 100 (Routine)
Whiteville	United States	Record low minimum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Brady	United States	Record low minimum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Middletown 4 W	United States	Record daily precipitation	26.7 mm (1.1 in)	31 of 100 (Routine)
Louisville 1 E	United States	Record low minimum temperature	10.0 C (50.0 F)	31 of 100 (Routine)
Franklin	United States	Record daily precipitation	36.3 mm (1.4 in)	31 of 100 (Routine)
Lampasas	United States	Record low minimum temperature	6.7 C (44.1 F)	31 of 100 (Routine)
Flagstaff AP	United States	Record high maximum temperature	27.8 C (82.0 F)	31 of 100 (Routine)
Oberon (Gingkin)	Australia	Record daily precipitation	37.1 mm (1.5 in)	30 of 100 (Routine)
Leoti	United States	Record high maximum temperature	37.2 C (99.0 F)	30 of 100 (Routine)
Chestnut Hill	United States	Record low maximum temperature	12.2 C (54.0 F)	30 of 100 (Routine)
Pembroke	United States	Record daily precipitation	42.4 mm (1.7 in)	30 of 100 (Routine)
Springfield	United States	Record low maximum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Tashkent	Uzbekistan	Record high maximum temperature	37.3 C (99.1 F)	30 of 100 (Routine)
Pamban	India	Record daily precipitation	49.0 mm (1.9 in)	29 of 100 (Routine)
Tiruppuvanam	India	Record daily precipitation	54.0 mm (2.1 in)	29 of 100 (Routine)
Hatchville	United States	Record daily precipitation	36.8 mm (1.4 in)	29 of 100 (Routine)
Ipswich	United States	Record daily precipitation	38.9 mm (1.5 in)	29 of 100 (Routine)
Milford	United States	Record daily precipitation	31.0 mm (1.2 in)	29 of 100 (Routine)
Grand Junction Walker Fld	United States	Record high maximum temperature	32.8 C (91.0 F)	29 of 100 (Routine)
Iramuco	Mexico	Record low minimum temperature	2.2 C (36.0 F)	28 of 100 (Routine)
Brekke I Sogn	Norway	Record daily precipitation	46.9 mm (1.8 in)	28 of 100 (Routine)
Oktjabrskij-Gorodok	Russia	Record low maximum temperature	12.9 C (55.2 F)	28 of 100 (Routine)
Torrevieja	Spain	Record low minimum temperature	9.0 C (48.2 F)	28 of 100 (Routine)
Valley Head	United States	Record low minimum temperature	2.8 C (37.0 F)	28 of 100 (Routine)
Athens	United States	Record low minimum temperature	8.3 C (46.9 F)	28 of 100 (Routine)
Newnan 7 WNW	United States	Record low minimum temperature	7.8 C (46.0 F)	28 of 100 (Routine)
Middleboro	United States	Record daily precipitation	38.4 mm (1.5 in)	28 of 100 (Routine)
Spot Pond	United States	Record daily precipitation	36.8 mm (1.4 in)	28 of 100 (Routine)

Counts by Type and Timescale

703 records

Records set or tied on 18 May 1970 by type: Highest daily maximum 240, Lowest daily maximum 42, Highest daily minimum 90, Lowest daily minimum 195, Heaviest daily rainfall 132, Heaviest daily snowfall 2, Deepest snow cover 2.

Records on 18 May 1970 by type
Record type	Records
Highest daily maximum	240
Lowest daily maximum	42
Highest daily minimum	90
Lowest daily minimum	195
Heaviest daily rainfall	132
Heaviest daily snowfall	2
Deepest snow cover	2

Records on 18 May 1970 by timescale: all-time 0, monthly 10, daily 693.

How Much Records Were Beaten By

506 broken records

Margins by which the 506 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 980.0. Ties are not counted.

Top 20 by Significance

18 May 1970

Top 20 records on 18 May 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1970	Sivaganga, IN	daily rain	60.0 mm (2.4 in)	46.5 mm (1.8 in)	64 years	55 of 100 (Notable)
18 May 1970	Alger-Dar El Beida, DZ	daily rain	50.0 mm (2.0 in)	40.5 mm (1.6 in)	24 years	50 of 100 (Notable)
18 May 1970	Dunderlandsdalen, NO	daily rain	28.7 mm (1.1 in)	14.3 mm (0.6 in)	56 years	49 of 100 (Notable)
18 May 1970	Port Aux Basques, CA	daily rain	39.1 mm (1.5 in)	24.4 mm (1.0 in)	44 years	46 of 100 (Notable)
18 May 1970	Moosehead, US	daily rain	46.0 mm (1.8 in)	28.0 mm (1.1 in)	4 years	45 of 100 (Notable)
18 May 1970	Southbridge 3 SW, US	daily rain	46.2 mm (1.8 in)	33.2 mm (1.3 in)	27 years	45 of 100 (Notable)
18 May 1970	Zhitckovichi, BY	daily rain	31.2 mm (1.2 in)	25.1 mm (1.0 in)	5 years	44 of 100 (Notable)
18 May 1970	Morekulam, IN	daily rain	70.4 mm (2.8 in)	56.4 mm (2.2 in)	12 years	44 of 100 (Notable)
18 May 1970	Krasnaja_Gora, RU	daily rain	25.7 mm (1.0 in)	21.0 mm (0.8 in)	12 years	44 of 100 (Notable)
18 May 1970	Pinkham Notch, US	daily rain	49.8 mm (2.0 in)	33.3 mm (1.3 in)	24 years	43 of 100 (Notable)
18 May 1970	Brocken, DE	daily snow depth	120.0 cm (47.2 in)	98.0 cm (38.6 in)	8 years	42 of 100 (Notable)
18 May 1970	Hardwick, US	daily rain	44.5 mm (1.8 in)	28.5 mm (1.1 in)	24 years	42 of 100 (Notable)
18 May 1970	Petersham 3 N, US	daily rain	47.0 mm (1.9 in)	23.6 mm (0.9 in)	51 years	42 of 100 (Notable)
18 May 1970	Keene, US	daily rain	38.4 mm (1.5 in)	11.7 mm (0.5 in)	69 years	42 of 100 (Notable)
18 May 1970	Ellsworth, US	daily rain	59.4 mm (2.3 in)	28.4 mm (1.1 in)	24 years	41 of 100 (Notable)
18 May 1970	Lakeport 2, US	daily rain	45.0 mm (1.8 in)	27.7 mm (1.1 in)	24 years	41 of 100 (Notable)
18 May 1970	Ramanathapuram, IN	daily rain	54.6 mm (2.1 in)	21.1 mm (0.8 in)	67 years	40 of 100 (Notable)
18 May 1970	Blue Hill Coop, US	daily rain	49.3 mm (1.9 in)	25.2 mm (1.0 in)	24 years	39 of 100 (Notable)
18 May 1970	Newburyport, US	daily rain	45.5 mm (1.8 in)	9.4 mm (0.37 in)	76 years	39 of 100 (Notable)
18 May 1970	Marquette, US	daily high min	12.2 C (54.0 F)	1.1 C (2.0 F)	87 years	38 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 1970

Records set or tied on this calendar date in each year from 1796 to 1970. 1970 had 703 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 1970-05-18: 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 200	505
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	1