Weather Records on 20 May 1931

451 weather records were set or tied worldwide on 20 May 1931. Highest significance: Zuerich/Fluntern, CH.

Key Facts for 20 May 1931

On 20 May 1931, 451 weather records were set or tied at long-record stations worldwide.
92 were record highs and 267 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 5 monthly and 445 daily.
Zuerich/Fluntern set an all-time record daily precipitation of 90.1 mm (3.5 in) on 20 May 1931.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 456 records.

Record Map

451 stations

451 station records on 20 May 1931 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1931: highest significance records shown on the map
Station	Country	Type	Value	Significance
Zuerich/Fluntern	Switzerland	Record daily precipitation	90.1 mm (3.5 in)	67 of 100 (Major)
Ulm	Germany	Record daily precipitation	42.9 mm (1.7 in)	53 of 100 (Notable)
Ohringen	Germany	Record daily precipitation	28.5 mm (1.1 in)	42 of 100 (Notable)
Avon Park 2 W	United States	Record daily precipitation	85.6 mm (3.4 in)	38 of 100 (Notable)
Rothenburg Ob der Tauber	Germany	Record daily precipitation	45.0 mm (1.8 in)	36 of 100 (Notable)
Port Gibson 1 NE	United States	Record daily precipitation	71.1 mm (2.8 in)	35 of 100 (Notable)
Masset Airport	Canada	Record daily precipitation	48.8 mm (1.9 in)	34 of 100 (Routine)
Guntur	India	Record daily precipitation	54.6 mm (2.1 in)	34 of 100 (Routine)
Weimar	Germany	Record daily precipitation	27.8 mm (1.1 in)	32 of 100 (Routine)
Highland Home	United States	Record daily precipitation	72.1 mm (2.8 in)	32 of 100 (Routine)
Oran-Hopital Militaire	Algeria	Record high minimum temperature	18.0 C (64.4 F)	31 of 100 (Routine)
Yeeda	Australia	Record daily precipitation	56.4 mm (2.2 in)	31 of 100 (Routine)
Kempten	Germany	Record daily precipitation	33.8 mm (1.3 in)	30 of 100 (Routine)
Raton	United States	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Chugwater	United States	Record low minimum temperature	-11.7 C (10.9 F)	30 of 100 (Routine)
Jackson 4 NW	United States	Record daily precipitation	78.7 mm (3.1 in)	30 of 100 (Routine)
Schreiber	Canada	Record daily snowfall	7.6 cm (3.0 in)	29 of 100 (Routine)
Berkeley	United States	Record high minimum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Centre Hall	United States	Record daily precipitation	69.9 mm (2.8 in)	29 of 100 (Routine)
Napa State Hospital	United States	Record high minimum temperature	21.1 C (70.0 F)	27 of 100 (Routine)
Crystal Springs Exp STN	United States	Record daily precipitation	62.2 mm (2.4 in)	27 of 100 (Routine)
Romney 1 SW	United States	Record daily precipitation	28.4 mm (1.1 in)	27 of 100 (Routine)
Freiburg	Germany	Record daily precipitation	41.2 mm (1.6 in)	26 of 100 (Routine)
Natchez	United States	Record daily precipitation	101.6 mm (4.0 in)	26 of 100 (Routine)
Franklin	United States	Record low minimum temperature	-1.7 C (28.9 F)	26 of 100 (Routine)
McPherson	United States	Record low minimum temperature	0.0 C (32.0 F)	25 of 100 (Routine)
Lake	United States	Record daily precipitation	50.8 mm (2.0 in)	25 of 100 (Routine)
Crow Agency	United States	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Rison	United States	Record daily precipitation	42.2 mm (1.7 in)	24 of 100 (Routine)
Dresden	United States	Record low minimum temperature	-2.8 C (27.0 F)	24 of 100 (Routine)
Batesville	United States	Record daily precipitation	76.2 mm (3.0 in)	24 of 100 (Routine)
Kukrahati	India	Record daily precipitation	38.1 mm (1.5 in)	23 of 100 (Routine)
Horton	United States	Record low minimum temperature	1.1 C (34.0 F)	23 of 100 (Routine)
Phillipsburg 1 SSE	United States	Record low minimum temperature	-2.2 C (28.0 F)	23 of 100 (Routine)
Water Valley	United States	Record daily precipitation	33.0 mm (1.3 in)	23 of 100 (Routine)
Caguas	Puerto Rico [United States]	Record daily precipitation	37.3 mm (1.5 in)	22 of 100 (Routine)
San Diego Wbo	United States	Record high minimum temperature	16.7 C (62.1 F)	22 of 100 (Routine)
Curtis	United States	Record low minimum temperature	-5.0 C (23.0 F)	22 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record low maximum temperature	3.9 C (39.0 F)	21 of 100 (Routine)
Sydney	Canada	Record high maximum temperature	28.3 C (82.9 F)	21 of 100 (Routine)
Stuttgart	Germany	Record daily precipitation	25.3 mm (1.0 in)	21 of 100 (Routine)
Crescent City 3 NNW	United States	Record high maximum temperature	26.7 C (80.1 F)	21 of 100 (Routine)
Oakland	United States	Record high minimum temperature	18.3 C (64.9 F)	21 of 100 (Routine)
Wray	United States	Record low minimum temperature	-5.6 C (21.9 F)	21 of 100 (Routine)
Brookhaven City	United States	Record daily precipitation	64.8 mm (2.6 in)	21 of 100 (Routine)
Enterprise	United States	Record daily precipitation	43.2 mm (1.7 in)	21 of 100 (Routine)
Conception	United States	Record low minimum temperature	0.6 C (33.1 F)	21 of 100 (Routine)
Bridgeport	United States	Record low minimum temperature	-6.7 C (19.9 F)	21 of 100 (Routine)
David City 4E	United States	Record low minimum temperature	-1.1 C (30.0 F)	21 of 100 (Routine)
Lodgepole	United States	Record low minimum temperature	-7.2 C (19.0 F)	21 of 100 (Routine)
New Orleans Audubon	United States	Record daily precipitation	30.5 mm (1.2 in)	21 of 100 (Routine)
Sacramento 5 ESE	United States	Record high minimum temperature	19.4 C (66.9 F)	21 of 100 (Routine)
Pommelsbrunn	Germany	Record daily precipitation	22.3 mm (0.9 in)	20 of 100 (Routine)
Kunzelsau	Germany	Record daily precipitation	23.3 mm (0.9 in)	20 of 100 (Routine)
Kenora	Canada	Record daily snowfall	2.5 cm (1.0 in)	20 of 100 (Routine)
Lawrence	United States	Record low minimum temperature	3.9 C (39.0 F)	20 of 100 (Routine)
Minden	United States	Record low minimum temperature	-1.1 C (30.0 F)	20 of 100 (Routine)
Charlottetown	Canada	Record high minimum temperature	11.7 C (53.1 F)	19 of 100 (Routine)
Arhangelsk	Russia	Record high minimum temperature	14.0 C (57.2 F)	19 of 100 (Routine)
El Cajon 2 E	United States	Record high maximum temperature	33.3 C (91.9 F)	19 of 100 (Routine)

Counts by Type and Timescale

451 records

Records set or tied on 20 May 1931 by type: Highest daily maximum 36, Lowest daily maximum 118, Highest daily minimum 56, Lowest daily minimum 149, Heaviest daily rainfall 86, Heaviest daily snowfall 6.

Records on 20 May 1931 by type
Record type	Records
Highest daily maximum	36
Lowest daily maximum	118
Highest daily minimum	56
Lowest daily minimum	149
Heaviest daily rainfall	86
Heaviest daily snowfall	6
Deepest snow cover	0

Records on 20 May 1931 by timescale: all-time 1, monthly 5, daily 445.

How Much Records Were Beaten By

388 broken records

Margins by which the 388 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.0. Ties are not counted.

Top 20 by Significance

20 May 1931

Top 20 records on 20 May 1931 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1931	Zuerich/Fluntern, CH	all-time rain	90.1 mm (3.5 in)	28.5 mm (1.1 in)	18 years	67 of 100 (Major)
20 May 1931	Ulm, DE	daily rain	42.9 mm (1.7 in)	30.8 mm (1.2 in)	35 years	53 of 100 (Notable)
20 May 1931	Ohringen, DE	daily rain	28.5 mm (1.1 in)	18.5 mm (0.7 in)	31 years	42 of 100 (Notable)
20 May 1931	Avon Park 2 W, US	daily rain	85.6 mm (3.4 in)	57.7 mm (2.3 in)	0 years	38 of 100 (Notable)
20 May 1931	Rothenburg Ob der Tauber, DE	monthly rain	45.0 mm (1.8 in)	6.5 mm (0.26 in)	33 years	36 of 100 (Notable)
20 May 1931	Port Gibson 1 NE, US	daily rain	71.1 mm (2.8 in)	55.9 mm (2.2 in)	20 years	35 of 100 (Notable)
20 May 1931	Masset Airport, CA	monthly rain	48.8 mm (1.9 in)	10.4 mm (0.4 in)	22 years	34 of 100 (Routine)
20 May 1931	Guntur, IN	daily rain	54.6 mm (2.1 in)	37.3 mm (1.5 in)	21 years	34 of 100 (Routine)
20 May 1931	Weimar, DE	daily rain	27.8 mm (1.1 in)	11.1 mm (0.4 in)	31 years	32 of 100 (Routine)
20 May 1931	Highland Home, US	daily rain	72.1 mm (2.8 in)	38.8 mm (1.5 in)	2 years	32 of 100 (Routine)
20 May 1931	Oran-Hopital Militaire, DZ	daily high min	18.0 C (64.4 F)	1.0 C (1.8 F)	64 years	31 of 100 (Routine)
20 May 1931	Yeeda, AU	monthly rain	56.4 mm (2.2 in)	13.2 mm (0.5 in)	16 years	31 of 100 (Routine)
20 May 1931	Kempten, DE	daily rain	33.8 mm (1.3 in)	14.1 mm (0.6 in)	33 years	30 of 100 (Routine)
20 May 1931	Raton, US	daily rain	38.1 mm (1.5 in)	23.4 mm (0.9 in)	21 years	30 of 100 (Routine)
20 May 1931	Chugwater, US	daily low min	-11.7 C (10.9 F)	7.8 C (14.0 F)	28 years	30 of 100 (Routine)
20 May 1931	Jackson 4 NW, US	daily rain	78.7 mm (3.1 in)	40.3 mm (1.6 in)	20 years	30 of 100 (Routine)
20 May 1931	Schreiber, CA	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	37 years	29 of 100 (Routine)
20 May 1931	Berkeley, US	daily high min	17.2 C (63.0 F)	3.3 C (5.9 F)	33 years	29 of 100 (Routine)
20 May 1931	Centre Hall, US	daily rain	69.9 mm (2.8 in)	33.1 mm (1.3 in)	8 years	29 of 100 (Routine)
20 May 1931	Napa State Hospital, US	daily high min	21.1 C (70.0 F)	7.2 C (13.0 F)	5 years	27 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 1931

Records set or tied on this calendar date in each year from 1802 to 1931. 1931 had 451 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 1931-05-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	343
10 to 20	23
20 to 30	7
30 to 40	10
40 to 50	2
50 to 60	2
60 to 70	0
70 to 80	1