Weather Records on 20 May 1970

310 weather records were set or tied worldwide on 20 May 1970. Highest significance: Villaflores (Smn), MX.

Key Facts for 20 May 1970

On 20 May 1970, 310 weather records were set or tied at long-record stations worldwide.
180 were record highs and 57 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 305 daily.
Villaflores (Smn) set a daily record low minimum temperature of 10.6 C (51.1 F) on 20 May 1970.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 457 records.

Record Map

310 stations

310 station records on 20 May 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Villaflores (Smn)	Mexico	Record low minimum temperature	10.6 C (51.1 F)	47 of 100 (Notable)
Lloydminster	Canada	Record daily precipitation	35.8 mm (1.4 in)	45 of 100 (Notable)
Brocken	Germany	Record snow depth	95.0 cm (37.4 in)	40 of 100 (Notable)
Kislovodsk	Russia	Record daily precipitation	30.7 mm (1.2 in)	38 of 100 (Notable)
Suldalsvatn	Norway	Record daily precipitation	39.6 mm (1.6 in)	36 of 100 (Notable)
Parvatipur	India	Record daily precipitation	88.0 mm (3.5 in)	33 of 100 (Routine)
Beloit	United States	Record high minimum temperature	21.7 C (71.1 F)	33 of 100 (Routine)
Ness City	United States	Record high minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Kimball 2NE	United States	Record high minimum temperature	13.3 C (55.9 F)	32 of 100 (Routine)
Primghar	United States	Record high minimum temperature	17.2 C (63.0 F)	31 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	9.6 C (49.3 F)	30 of 100 (Routine)
Gudermes	Russia	Record daily precipitation	48.3 mm (1.9 in)	30 of 100 (Routine)
Ft Morgan	United States	Record high minimum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Smith Ctr	United States	Record high minimum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Yirrkala Mission	Australia	Record daily precipitation	77.7 mm (3.1 in)	29 of 100 (Routine)
Cameron Falls	Canada	Record daily precipitation	53.3 mm (2.1 in)	29 of 100 (Routine)
Sibley	United States	Record high minimum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Denton 2 E	United States	Record high minimum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Curtis	United States	Record high minimum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Goodland	United States	Record high minimum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Caledonia	United States	Record high maximum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Minden	United States	Record high minimum temperature	19.4 C (66.9 F)	28 of 100 (Routine)
Hawley 1 E	United States	Record daily precipitation	32.3 mm (1.3 in)	28 of 100 (Routine)
Botnen I Forde	Norway	Record daily precipitation	36.0 mm (1.4 in)	27 of 100 (Routine)
Marshalltown	United States	Record high minimum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Imperial	United States	Record high minimum temperature	16.7 C (62.1 F)	27 of 100 (Routine)
Madison	United States	Record high minimum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Yemassee 1 N	United States	Record low minimum temperature	8.3 C (46.9 F)	27 of 100 (Routine)
Kakabeka Falls	Canada	Record daily precipitation	38.9 mm (1.5 in)	26 of 100 (Routine)
Hovlandsdal	Norway	Record daily precipitation	33.4 mm (1.3 in)	26 of 100 (Routine)
Sand I Ryfylke II	Norway	Record daily precipitation	52.5 mm (2.1 in)	26 of 100 (Routine)
Glenwood 3SW	United States	Record high minimum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Sioux Ctr 2 SE	United States	Record high minimum temperature	17.8 C (64.0 F)	26 of 100 (Routine)
Hugoton	United States	Record high minimum temperature	18.9 C (66.0 F)	26 of 100 (Routine)
Windom	United States	Record high minimum temperature	18.3 C (64.9 F)	26 of 100 (Routine)
Gothenburg	United States	Record high minimum temperature	18.3 C (64.9 F)	26 of 100 (Routine)
N Loup	United States	Record high minimum temperature	18.9 C (66.0 F)	26 of 100 (Routine)
Ures (Smn)	Mexico	Record high minimum temperature	21.1 C (70.0 F)	24 of 100 (Routine)
Hundseid I Vikedal	Norway	Record daily precipitation	44.3 mm (1.7 in)	24 of 100 (Routine)
Weeping Water	United States	Record high minimum temperature	21.1 C (70.0 F)	24 of 100 (Routine)
Louisburg	United States	Record low minimum temperature	6.1 C (43.0 F)	24 of 100 (Routine)
Muskegon Co AP	United States	Record high maximum temperature	28.3 C (82.9 F)	24 of 100 (Routine)
Sattur	India	Record daily precipitation	28.0 mm (1.1 in)	23 of 100 (Routine)
Plainfield	United States	Record daily precipitation	38.1 mm (1.5 in)	23 of 100 (Routine)
Atkinson 3SW	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Zharkent	Kazakhstan	Record high minimum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Grover 10 W	United States	Record high minimum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
Cambridge	United States	Record high minimum temperature	22.8 C (73.0 F)	22 of 100 (Routine)
Mutual	United States	Record high minimum temperature	19.4 C (66.9 F)	22 of 100 (Routine)
Etne	Norway	Record daily precipitation	25.4 mm (1.0 in)	21 of 100 (Routine)
Healy	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Collegeville St John's	United States	Record high maximum temperature	31.7 C (89.1 F)	21 of 100 (Routine)
Central City	United States	Record high minimum temperature	19.4 C (66.9 F)	21 of 100 (Routine)
Tyndall	United States	Record high minimum temperature	20.6 C (69.1 F)	21 of 100 (Routine)
Yellowstone Park Mammoth	United States	Record high minimum temperature	11.7 C (53.1 F)	21 of 100 (Routine)
Aktobe	Kazakhstan	Record daily precipitation	16.4 mm (0.6 in)	20 of 100 (Routine)
Karabutak	Kazakhstan	Record daily precipitation	19.2 mm (0.8 in)	20 of 100 (Routine)
Essej	Russia	Record daily precipitation	5.7 mm (0.22 in)	20 of 100 (Routine)
Ust-Koksa	Russia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Cemal	Russia	Record daily precipitation	24.0 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

310 records

Records set or tied on 20 May 1970 by type: Highest daily maximum 44, Lowest daily maximum 7, Highest daily minimum 136, Lowest daily minimum 50, Heaviest daily rainfall 71, Deepest snow cover 2.

Records on 20 May 1970 by type
Record type	Records
Highest daily maximum	44
Lowest daily maximum	7
Highest daily minimum	136
Lowest daily minimum	50
Heaviest daily rainfall	71
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 20 May 1970 by timescale: all-time 0, monthly 5, daily 305.

How Much Records Were Beaten By

230 broken records

Margins by which the 230 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 700.0. Ties are not counted.

Top 20 by Significance

20 May 1970

Top 20 records on 20 May 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1970	Villaflores (Smn), MX	daily low min	10.6 C (51.1 F)	7.2 C (13.0 F)	32 years	47 of 100 (Notable)
20 May 1970	Lloydminster, CA	daily rain	35.8 mm (1.4 in)	29.4 mm (1.2 in)	8 years	45 of 100 (Notable)
20 May 1970	Brocken, DE	daily snow depth	95.0 cm (37.4 in)	70.0 cm (27.6 in)	35 years	40 of 100 (Notable)
20 May 1970	Kislovodsk, RU	daily rain	30.7 mm (1.2 in)	4.0 mm (0.16 in)	83 years	38 of 100 (Notable)
20 May 1970	Suldalsvatn, NO	daily rain	39.6 mm (1.6 in)	20.2 mm (0.8 in)	4 years	36 of 100 (Notable)
20 May 1970	Parvatipur, IN	daily rain	88.0 mm (3.5 in)	27.0 mm (1.1 in)	33 years	33 of 100 (Routine)
20 May 1970	Beloit, US	daily high min	21.7 C (71.1 F)	2.8 C (5.0 F)	72 years	33 of 100 (Routine)
20 May 1970	Ness City, US	daily high min	20.0 C (68.0 F)	3.3 C (5.9 F)	61 years	32 of 100 (Routine)
20 May 1970	Kimball 2NE, US	daily high min	13.3 C (55.9 F)	1.6 C (2.9 F)	72 years	32 of 100 (Routine)
20 May 1970	Primghar, US	daily high min	17.2 C (63.0 F)	2.2 C (4.0 F)	68 years	31 of 100 (Routine)
20 May 1970	Irkutsk, RU	daily high min	9.6 C (49.3 F)	1.7 C (3.1 F)	61 years	30 of 100 (Routine)
20 May 1970	Gudermes, RU	daily rain	48.3 mm (1.9 in)	21.5 mm (0.8 in)	13 years	30 of 100 (Routine)
20 May 1970	Ft Morgan, US	daily high min	14.4 C (57.9 F)	1.1 C (2.0 F)	72 years	30 of 100 (Routine)
20 May 1970	Smith Ctr, US	daily high min	21.7 C (71.1 F)	4.5 C (8.1 F)	56 years	30 of 100 (Routine)
20 May 1970	Yirrkala Mission, AU	daily rain	77.7 mm (3.1 in)	63.2 mm (2.5 in)	1 year	29 of 100 (Routine)
20 May 1970	Cameron Falls, CA	monthly rain	53.3 mm (2.1 in)	1.7 mm (0.07 in)	44 years	29 of 100 (Routine)
20 May 1970	Sibley, US	daily high min	18.3 C (64.9 F)	3.3 C (5.9 F)	56 years	29 of 100 (Routine)
20 May 1970	Denton 2 E, US	daily high min	19.4 C (66.9 F)	0.5 C (0.9 F)	71 years	29 of 100 (Routine)
20 May 1970	Curtis, US	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	72 years	29 of 100 (Routine)
20 May 1970	Goodland, US	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	72 years	29 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 1970

Records set or tied on this calendar date in each year from 1802 to 1970. 1970 had 310 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 1970-05-20: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 100	228
100 to 200	1
200 to 300	0
300 to 400	0
400 to 500	0
500 to 600	0
600 to 700	1