Weather Records on 20 May 1975

1,332 weather records were set or tied worldwide on 20 May 1975. Highest significance: Nephi, US.

Key Facts for 20 May 1975

On 20 May 1975, 1,332 weather records were set or tied at long-record stations worldwide.
649 were record highs and 307 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 85 monthly and 1,243 daily.
Nephi set a monthly record daily snowfall of 33.3 cm (13.1 in) on 20 May 1975.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 450 records.

Record Map

1,332 stations

1,332 station records on 20 May 1975 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1975: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nephi	United States	Record daily snowfall	33.3 cm (13.1 in)	73 of 100 (Major)
Soldier Summit	United States	Record daily snowfall	27.9 cm (11.0 in)	70 of 100 (Major)
Spanish Fk Pwr House	United States	Record daily precipitation	72.6 mm (2.9 in)	70 of 100 (Major)
Fillmore	United States	Record daily snowfall	55.4 cm (21.8 in)	69 of 100 (Major)
Richfield Radio Ksvc	United States	Record daily precipitation	26.2 mm (1.0 in)	66 of 100 (Major)
Oak City	United States	Record daily precipitation	73.2 mm (2.9 in)	65 of 100 (Major)
Manti	United States	Record daily precipitation	33.8 mm (1.3 in)	64 of 100 (Major)
Farson 2NNE	United States	Record daily snowfall	20.3 cm (8.0 in)	64 of 100 (Major)
Paulding	United States	Record daily precipitation	79.2 mm (3.1 in)	63 of 100 (Major)
Elberta	United States	Record daily precipitation	48.0 mm (1.9 in)	63 of 100 (Major)
Umea	Sweden	Record daily precipitation	27.5 mm (1.1 in)	60 of 100 (Major)
Tooele	United States	Record daily snowfall	17.8 cm (7.0 in)	60 of 100 (Major)
Rock Springs	United States	Record daily snowfall	25.4 cm (10.0 in)	60 of 100 (Major)
Auburn 2 SSE	United States	Record daily precipitation	42.4 mm (1.7 in)	59 of 100 (Notable)
Eureka	United States	Record daily precipitation	54.4 mm (2.1 in)	58 of 100 (Notable)
Levan	United States	Record daily snowfall	40.6 cm (16.0 in)	58 of 100 (Notable)
Richfield Radio Ksvc	United States	Record daily snowfall	25.4 cm (10.0 in)	58 of 100 (Notable)
Ibapah	United States	Record daily snowfall	15.2 cm (6.0 in)	57 of 100 (Notable)
Minersville	United States	Record daily snowfall	20.3 cm (8.0 in)	57 of 100 (Notable)
Manila	United States	Record daily snowfall	55.9 cm (22.0 in)	56 of 100 (Notable)
Scipio	United States	Record daily precipitation	57.7 mm (2.3 in)	56 of 100 (Notable)
Flin Flon	Canada	Record daily snowfall	18.8 cm (7.4 in)	55 of 100 (Notable)
Snake Creek Powerhouse	United States	Record daily snowfall	22.9 cm (9.0 in)	54 of 100 (Notable)
Kaycee	United States	Record daily snowfall	12.7 cm (5.0 in)	54 of 100 (Notable)
Ishpeming	United States	Record daily precipitation	66.0 mm (2.6 in)	53 of 100 (Notable)
Pioche	United States	Record daily precipitation	35.1 mm (1.4 in)	53 of 100 (Notable)
Eureka	United States	Record daily snowfall	45.7 cm (18.0 in)	53 of 100 (Notable)
Richmond	United States	Record daily snowfall	15.2 cm (6.0 in)	53 of 100 (Notable)
Rock Springs	United States	Record daily precipitation	25.4 mm (1.0 in)	53 of 100 (Notable)
Brady Aznoe	United States	Record daily snowfall	7.6 cm (3.0 in)	52 of 100 (Notable)
Fillmore	United States	Record daily precipitation	52.8 mm (2.1 in)	52 of 100 (Notable)
Moroni	United States	Record daily precipitation	40.1 mm (1.6 in)	52 of 100 (Notable)
Ft Washakie 1 SE	United States	Record daily snowfall	20.3 cm (8.0 in)	52 of 100 (Notable)
Moroni	United States	Record daily snowfall	25.4 cm (10.0 in)	51 of 100 (Notable)
Oak City	United States	Record snow depth	38.1 cm (15.0 in)	50 of 100 (Notable)
Itapage	Brazil	Record daily precipitation	69.2 mm (2.7 in)	49 of 100 (Notable)
Deseret	United States	Record daily snowfall	38.1 cm (15.0 in)	49 of 100 (Notable)
Silver Lake Brighton	United States	Record daily precipitation	52.1 mm (2.1 in)	49 of 100 (Notable)
Spanish Fk Pwr House	United States	Record daily snowfall	12.7 cm (5.0 in)	48 of 100 (Notable)
Casper 2 E	United States	Record daily snowfall	11.7 cm (4.6 in)	48 of 100 (Notable)
Chicago Midway AP 3SW	United States	Record daily precipitation	64.5 mm (2.5 in)	47 of 100 (Notable)
Logan Utah St UNIV	United States	Record daily snowfall	11.2 cm (4.4 in)	47 of 100 (Notable)
Casper 2 E	United States	Record daily precipitation	30.5 mm (1.2 in)	47 of 100 (Notable)
Riverton	United States	Record daily snowfall	12.7 cm (5.0 in)	47 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record high minimum temperature	8.1 C (46.6 F)	46 of 100 (Notable)
Heber	United States	Record daily snowfall	20.3 cm (8.0 in)	46 of 100 (Notable)
Ashton 1N	United States	Record daily snowfall	7.6 cm (3.0 in)	45 of 100 (Notable)
Deseret	United States	Record daily precipitation	48.8 mm (1.9 in)	45 of 100 (Notable)
Breakwater	United States	Record daily precipitation	45.5 mm (1.8 in)	45 of 100 (Notable)
Acude Sao Vicente	Brazil	Record daily precipitation	79.4 mm (3.1 in)	44 of 100 (Notable)
Heber	United States	Record daily precipitation	30.7 mm (1.2 in)	44 of 100 (Notable)
Heber	United States	Record snow depth	10.2 cm (4.0 in)	44 of 100 (Notable)
Santaquin Chlorinator	United States	Record daily snowfall	30.5 cm (12.0 in)	44 of 100 (Notable)
Delta	United States	Record daily snowfall	40.6 cm (16.0 in)	44 of 100 (Notable)
Bannister	Australia	Record daily precipitation	31.2 mm (1.2 in)	43 of 100 (Notable)
Busselton Shire	Australia	Record daily precipitation	41.0 mm (1.6 in)	43 of 100 (Notable)
Echo Dam	United States	Record daily snowfall	15.2 cm (6.0 in)	43 of 100 (Notable)
Fillmore	United States	Record snow depth	38.1 cm (15.0 in)	43 of 100 (Notable)
Garrison	United States	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)
Manila	United States	Record daily precipitation	34.3 mm (1.4 in)	43 of 100 (Notable)

Counts by Type and Timescale

1,332 records

Records set or tied on 20 May 1975 by type: Highest daily maximum 247, Lowest daily maximum 156, Highest daily minimum 402, Lowest daily minimum 151, Heaviest daily rainfall 272, Heaviest daily snowfall 80, Deepest snow cover 24.

Records on 20 May 1975 by type
Record type	Records
Highest daily maximum	247
Lowest daily maximum	156
Highest daily minimum	402
Lowest daily minimum	151
Heaviest daily rainfall	272
Heaviest daily snowfall	80
Deepest snow cover	24

Records on 20 May 1975 by timescale: all-time 4, monthly 85, daily 1,243.

How Much Records Were Beaten By

1,039 broken records

Margins by which the 1,039 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 406.0. Ties are not counted.

Top 20 by Significance

20 May 1975

Top 20 records on 20 May 1975 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1975	Nephi, US	monthly snowfall	33.3 cm (13.1 in)	18.1 cm (7.1 in)	67 years	73 of 100 (Major)
20 May 1975	Soldier Summit, US	daily snowfall	27.9 cm (11.0 in)	22.8 cm (9.0 in)	75 years	70 of 100 (Major)
20 May 1975	Spanish Fk Pwr House, US	monthly rain	72.6 mm (2.9 in)	32.2 mm (1.3 in)	49 years	70 of 100 (Major)
20 May 1975	Fillmore, US	monthly snowfall	55.4 cm (21.8 in)	24.9 cm (9.8 in)	42 years	69 of 100 (Major)
20 May 1975	Richfield Radio Ksvc, US	daily rain	26.2 mm (1.0 in)	18.6 mm (0.7 in)	60 years	66 of 100 (Major)
20 May 1975	Oak City, US	all-time rain	73.2 mm (2.9 in)	15.5 mm (0.6 in)	45 years	65 of 100 (Major)
20 May 1975	Manti, US	daily rain	33.8 mm (1.3 in)	19.6 mm (0.8 in)	57 years	64 of 100 (Major)
20 May 1975	Farson 2NNE, US	daily snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	60 years	64 of 100 (Major)
20 May 1975	Paulding, US	daily rain	79.2 mm (3.1 in)	49.5 mm (1.9 in)	57 years	63 of 100 (Major)
20 May 1975	Elberta, US	monthly rain	48.0 mm (1.9 in)	17.5 mm (0.7 in)	37 years	63 of 100 (Major)
20 May 1975	Umea, SE	daily rain	27.5 mm (1.1 in)	12.1 mm (0.5 in)	90 years	60 of 100 (Major)
20 May 1975	Tooele, US	daily snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	58 years	60 of 100 (Major)
20 May 1975	Rock Springs, US	monthly snowfall	25.4 cm (10.0 in)	12.7 cm (5.0 in)	11 years	60 of 100 (Major)
20 May 1975	Auburn 2 SSE, US	daily rain	42.4 mm (1.7 in)	33.8 mm (1.3 in)	70 years	59 of 100 (Notable)
20 May 1975	Eureka, US	monthly rain	54.4 mm (2.1 in)	20.9 mm (0.8 in)	28 years	58 of 100 (Notable)
20 May 1975	Levan, US	monthly snowfall	40.6 cm (16.0 in)	15.2 cm (6.0 in)	34 years	58 of 100 (Notable)
20 May 1975	Richfield Radio Ksvc, US	monthly snowfall	25.4 cm (10.0 in)	15.2 cm (6.0 in)	34 years	58 of 100 (Notable)
20 May 1975	Ibapah, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	69 years	57 of 100 (Notable)
20 May 1975	Minersville, US	monthly snowfall	20.3 cm (8.0 in)	10.1 cm (4.0 in)	68 years	57 of 100 (Notable)
20 May 1975	Manila, US	monthly snowfall	55.9 cm (22.0 in)	30.5 cm (12.0 in)	0 years	56 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

1802 to 1975

Records set or tied on this calendar date in each year from 1802 to 1975. 1975 had 1,332 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 1975-05-20: 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).

Histogram of margins by which records were beaten on 20 May 1975
Margin	Records
0 to 100	998
100 to 200	30
200 to 300	7
300 to 400	3
400 to 500	1