Weather Records on 20 May 1971

653 weather records were set or tied worldwide on 20 May 1971. Highest significance: Chatillon-Sur-Seine, FR.

Key Facts for 20 May 1971

On 20 May 1971, 653 weather records were set or tied at long-record stations worldwide.
149 were record highs and 219 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 12 monthly and 640 daily.
Chatillon-Sur-Seine set a daily record precipitation of 42.6 mm (1.7 in) on 20 May 1971.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 454 records.

Record Map

653 stations

653 station records on 20 May 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Chatillon-Sur-Seine	France	Record daily precipitation	42.6 mm (1.7 in)	60 of 100 (Major)
Taldra	Australia	Record daily precipitation	28.4 mm (1.1 in)	58 of 100 (Notable)
Yuleba Garden St	Australia	Record daily precipitation	61.2 mm (2.4 in)	56 of 100 (Notable)
Portage des Roches	Canada	Record daily precipitation	46.7 mm (1.8 in)	54 of 100 (Notable)
Meribah	Australia	Record daily precipitation	27.2 mm (1.1 in)	51 of 100 (Notable)
Yuleba State Forest	Australia	Record daily precipitation	68.6 mm (2.7 in)	51 of 100 (Notable)
Nossa Senhora Das Dores	Brazil	Record daily precipitation	77.1 mm (3.0 in)	49 of 100 (Notable)
Arvida	Canada	Record daily precipitation	58.4 mm (2.3 in)	47 of 100 (Notable)
Frogmoor	Australia	Record daily precipitation	48.3 mm (1.9 in)	46 of 100 (Notable)
Beachport	Australia	Record daily precipitation	30.2 mm (1.2 in)	45 of 100 (Notable)
Weihenstephan-Durnast	Germany	Record daily precipitation	57.6 mm (2.3 in)	45 of 100 (Notable)
Ft Ripley	United States	Record daily snowfall	7.6 cm (3.0 in)	45 of 100 (Notable)
Carson City	United States	Record daily snowfall	7.6 cm (3.0 in)	45 of 100 (Notable)
Goldfield	United States	Record daily snowfall	10.2 cm (4.0 in)	45 of 100 (Notable)
Paringa (Beardy Park Farm)	Australia	Record daily precipitation	27.9 mm (1.1 in)	44 of 100 (Notable)
Gabriels	United States	Record daily precipitation	67.8 mm (2.7 in)	44 of 100 (Notable)
Mutooroo	Australia	Record daily precipitation	32.0 mm (1.3 in)	43 of 100 (Notable)
Lake Crescent (Serat)	Australia	Record daily precipitation	37.1 mm (1.5 in)	42 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	20.9 C (69.6 F)	41 of 100 (Notable)
Pentland Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	38 of 100 (Notable)
Huntingdon	Canada	Record high minimum temperature	17.8 C (64.0 F)	38 of 100 (Notable)
Reno AP	United States	Record daily snowfall	12.7 cm (5.0 in)	38 of 100 (Notable)
Prairie Post Office	Australia	Record daily precipitation	29.0 mm (1.1 in)	37 of 100 (Notable)
Bustard Head Lighthouse	Australia	Record daily precipitation	54.4 mm (2.1 in)	37 of 100 (Notable)
Huntingdon	Canada	Record high maximum temperature	27.8 C (82.0 F)	37 of 100 (Notable)
Emu Park Hill St	Australia	Record daily precipitation	27.2 mm (1.1 in)	36 of 100 (Notable)
Glenmorgan Post Office	Australia	Record daily precipitation	49.5 mm (1.9 in)	35 of 100 (Notable)
Surat	Australia	Record daily precipitation	45.2 mm (1.8 in)	35 of 100 (Notable)
Geisenheim	Germany	Record high minimum temperature	15.9 C (60.6 F)	35 of 100 (Notable)
Miles Post Office	Australia	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Espanola	United States	Record low minimum temperature	-3.9 C (25.0 F)	34 of 100 (Routine)
Taos	United States	Record low minimum temperature	-3.9 C (25.0 F)	34 of 100 (Routine)
Dardanup East	Australia	Record daily precipitation	46.0 mm (1.8 in)	33 of 100 (Routine)
Peppermint Grove	Australia	Record daily precipitation	32.8 mm (1.3 in)	33 of 100 (Routine)
Wallumbilla Post Office	Australia	Record daily precipitation	51.8 mm (2.0 in)	33 of 100 (Routine)
Dunkirk 19NNE	United States	Record daily snowfall	5.1 cm (2.0 in)	33 of 100 (Routine)
Noggerup	Australia	Record daily precipitation	35.6 mm (1.4 in)	32 of 100 (Routine)
Mingela Post Office	Australia	Record daily precipitation	32.5 mm (1.3 in)	32 of 100 (Routine)
Healdton 3 E	United States	Record low minimum temperature	5.0 C (41.0 F)	32 of 100 (Routine)
Mc Minnville	United States	Record low minimum temperature	-1.1 C (30.0 F)	32 of 100 (Routine)
Wilbur	United States	Record low maximum temperature	8.9 C (48.0 F)	32 of 100 (Routine)
Boyup Brook	Australia	Record daily precipitation	32.0 mm (1.3 in)	31 of 100 (Routine)
Pinnaroo	Australia	Record daily precipitation	31.5 mm (1.2 in)	31 of 100 (Routine)
Woodlea	Australia	Record daily precipitation	46.0 mm (1.8 in)	31 of 100 (Routine)
Beaver	United States	Record low minimum temperature	5.0 C (41.0 F)	31 of 100 (Routine)
Newbicup	Australia	Record daily precipitation	26.7 mm (1.1 in)	30 of 100 (Routine)
Chamingup	Australia	Record daily precipitation	27.2 mm (1.1 in)	30 of 100 (Routine)
Nadda (Zimmerman)	Australia	Record daily precipitation	33.3 mm (1.3 in)	30 of 100 (Routine)
Cotswold	Australia	Record daily precipitation	70.9 mm (2.8 in)	30 of 100 (Routine)
Dulacca Truck Stop	Australia	Record daily precipitation	46.7 mm (1.8 in)	30 of 100 (Routine)
Montreal McGill	Canada	Record high minimum temperature	18.9 C (66.0 F)	30 of 100 (Routine)
Aldersbach-Kriestorf	Germany	Record daily precipitation	30.2 mm (1.2 in)	30 of 100 (Routine)
Nogales	United States	Record low minimum temperature	1.7 C (35.1 F)	30 of 100 (Routine)
Bonners Ferry	United States	Record low maximum temperature	9.4 C (48.9 F)	30 of 100 (Routine)
Aitkin 2E	United States	Record daily precipitation	43.2 mm (1.7 in)	30 of 100 (Routine)
Plattsburgh AFB	United States	Record high minimum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Northfield	United States	Record high maximum temperature	31.7 C (89.1 F)	30 of 100 (Routine)
Rockdale	Australia	Record daily precipitation	48.3 mm (1.9 in)	29 of 100 (Routine)
Ellensburg	United States	Record low maximum temperature	11.7 C (53.1 F)	29 of 100 (Routine)
Wichita Falls Muni AP	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

653 records

Records set or tied on 20 May 1971 by type: Highest daily maximum 65, Lowest daily maximum 83, Highest daily minimum 84, Lowest daily minimum 136, Heaviest daily rainfall 264, Heaviest daily snowfall 17, Deepest snow cover 4.

Records on 20 May 1971 by type
Record type	Records
Highest daily maximum	65
Lowest daily maximum	83
Highest daily minimum	84
Lowest daily minimum	136
Heaviest daily rainfall	264
Heaviest daily snowfall	17
Deepest snow cover	4

Records on 20 May 1971 by timescale: all-time 1, monthly 12, daily 640.

How Much Records Were Beaten By

540 broken records

Margins by which the 540 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

20 May 1971

Top 20 records on 20 May 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1971	Chatillon-Sur-Seine, FR	daily rain	42.6 mm (1.7 in)	21.9 mm (0.9 in)	53 years	60 of 100 (Major)
20 May 1971	Taldra, AU	daily rain	28.4 mm (1.1 in)	22.6 mm (0.9 in)	46 years	58 of 100 (Notable)
20 May 1971	Yuleba Garden St, AU	daily rain	61.2 mm (2.4 in)	40.1 mm (1.6 in)	60 years	56 of 100 (Notable)
20 May 1971	Portage des Roches, CA	daily rain	46.7 mm (1.8 in)	25.1 mm (1.0 in)	34 years	54 of 100 (Notable)
20 May 1971	Meribah, AU	daily rain	27.2 mm (1.1 in)	17.0 mm (0.7 in)	46 years	51 of 100 (Notable)
20 May 1971	Yuleba State Forest, AU	daily rain	68.6 mm (2.7 in)	61.7 mm (2.4 in)	25 years	51 of 100 (Notable)
20 May 1971	Nossa Senhora Das Dores, BR	daily rain	77.1 mm (3.0 in)	46.5 mm (1.8 in)	44 years	49 of 100 (Notable)
20 May 1971	Arvida, CA	monthly rain	58.4 mm (2.3 in)	15.0 mm (0.6 in)	31 years	47 of 100 (Notable)
20 May 1971	Frogmoor, AU	daily rain	48.3 mm (1.9 in)	46.8 mm (1.8 in)	20 years	46 of 100 (Notable)
20 May 1971	Beachport, AU	daily rain	30.2 mm (1.2 in)	11.1 mm (0.4 in)	68 years	45 of 100 (Notable)
20 May 1971	Weihenstephan-Durnast, DE	daily rain	57.6 mm (2.3 in)	26.4 mm (1.0 in)	21 years	45 of 100 (Notable)
20 May 1971	Ft Ripley, US	daily snowfall	7.6 cm (3.0 in)	7.3 cm (2.9 in)	78 years	45 of 100 (Notable)
20 May 1971	Carson City, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	76 years	45 of 100 (Notable)
20 May 1971	Goldfield, US	daily snowfall	10.2 cm (4.0 in)	10.2 cm (4.0 in)	64 years	45 of 100 (Notable)
20 May 1971	Paringa (Beardy Park Farm), AU	daily rain	27.9 mm (1.1 in)	19.0 mm (0.7 in)	21 years	44 of 100 (Notable)
20 May 1971	Gabriels, US	monthly rain	67.8 mm (2.7 in)	8.1 mm (0.32 in)	55 years	44 of 100 (Notable)
20 May 1971	Mutooroo, AU	daily rain	32.0 mm (1.3 in)	28.2 mm (1.1 in)	21 years	43 of 100 (Notable)
20 May 1971	Lake Crescent (Serat), AU	daily rain	37.1 mm (1.5 in)	22.9 mm (0.9 in)	42 years	42 of 100 (Notable)
20 May 1971	Hvar, HR	daily high min	20.9 C (69.6 F)	1.6 C (2.9 F)	87 years	41 of 100 (Notable)
20 May 1971	Pentland Post Office, AU	daily rain	31.0 mm (1.2 in)	21.3 mm (0.8 in)	49 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

1802 to 1971

Records set or tied on this calendar date in each year from 1802 to 1971. 1971 had 653 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 1971-05-20: 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 50	531
50 to 100	6
100 to 150	2
150 to 200	0
200 to 250	0
250 to 300	1