Weather Records on 20 May 1911

82 weather records were set or tied worldwide on 20 May 1911. Highest significance: George Airport, ZA.

Key Facts for 20 May 1911

On 20 May 1911, 82 weather records were set or tied at long-record stations worldwide.
49 were record highs and 0 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 7 monthly and 74 daily.
George Airport set a daily record precipitation of 86.6 mm (3.4 in) on 20 May 1911.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 458 records.

Record Map

82 stations

82 station records on 20 May 1911 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1911: highest significance records shown on the map
Station	Country	Type	Value	Significance
George Airport	South Africa	Record daily precipitation	86.6 mm (3.4 in)	50 of 100 (Notable)
Springbok	South Africa	Record daily precipitation	35.6 mm (1.4 in)	48 of 100 (Notable)
Ladismith (Tnk)	South Africa	Record daily precipitation	103.1 mm (4.1 in)	44 of 100 (Notable)
Barrie	Canada	Record high minimum temperature	17.8 C (64.0 F)	27 of 100 (Routine)
Uniondale (Tnk)	South Africa	Record daily precipitation	33.8 mm (1.3 in)	27 of 100 (Routine)
Stratford	Canada	Record high minimum temperature	19.4 C (66.9 F)	25 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	19.4 C (66.9 F)	24 of 100 (Routine)
Owen Sound	Canada	Record high minimum temperature	21.1 C (70.0 F)	22 of 100 (Routine)
Owen Sound	Canada	Record high maximum temperature	35.6 C (96.1 F)	21 of 100 (Routine)
Brantford	Canada	Record high minimum temperature	19.4 C (66.9 F)	21 of 100 (Routine)
Quebec	Canada	Record high maximum temperature	32.2 C (90.0 F)	21 of 100 (Routine)
Bredasdorp	South Africa	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Willowmore	South Africa	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Sterling	South Africa	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Aberdeen (Tnk)	South Africa	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Warialda Post Office	Australia	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Yallaroi	Australia	Record daily precipitation	8.9 mm (0.35 in)	20 of 100 (Routine)
Portland	Australia	Record daily precipitation	22.6 mm (0.9 in)	20 of 100 (Routine)
Parry Sound	Canada	Record high minimum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Beaufort West (Met)	South Africa	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Buffalo	United States	Record high maximum temperature	31.1 C (88.0 F)	20 of 100 (Routine)
Beatrice	Canada	Record high minimum temperature	17.8 C (64.0 F)	18 of 100 (Routine)
Port Stanley	Canada	Record high maximum temperature	27.2 C (81.0 F)	18 of 100 (Routine)
Welland	Canada	Record high maximum temperature	31.7 C (89.1 F)	18 of 100 (Routine)
Tartu	Estonia	Record daily precipitation	10.2 mm (0.4 in)	18 of 100 (Routine)
Robertson	South Africa	Record daily precipitation	7.1 mm (0.28 in)	18 of 100 (Routine)
Stonecliffe	Canada	Record high maximum temperature	32.2 C (90.0 F)	17 of 100 (Routine)
Beatrice	Canada	Record high maximum temperature	30.6 C (87.1 F)	17 of 100 (Routine)
Southampton	Canada	Record high minimum temperature	18.3 C (64.9 F)	17 of 100 (Routine)
Montreal McGill	Canada	Record high minimum temperature	17.8 C (64.0 F)	17 of 100 (Routine)
Pointe Au Pere	Canada	Record high maximum temperature	23.9 C (75.0 F)	17 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high maximum temperature	31.7 C (89.1 F)	17 of 100 (Routine)
Washington	United States	Record high maximum temperature	35.0 C (95.0 F)	17 of 100 (Routine)
Hill End Post Office	Australia	Record daily precipitation	7.4 mm (0.29 in)	16 of 100 (Routine)
Port Dover	Canada	Record high minimum temperature	16.1 C (61.0 F)	16 of 100 (Routine)
Brantford	Canada	Record high maximum temperature	32.8 C (91.0 F)	16 of 100 (Routine)
Woodstock	Canada	Record high maximum temperature	30.6 C (87.1 F)	16 of 100 (Routine)
Worcester	South Africa	Record daily precipitation	6.3 mm (0.25 in)	16 of 100 (Routine)
Toledo Blade	United States	Record high minimum temperature	21.7 C (71.1 F)	16 of 100 (Routine)
Tenterden	Australia	Record daily precipitation	8.9 mm (0.35 in)	15 of 100 (Routine)
Southampton	Canada	Record high maximum temperature	30.0 C (86.0 F)	15 of 100 (Routine)
Stratford	Canada	Record high maximum temperature	31.1 C (88.0 F)	15 of 100 (Routine)
Jansenville	South Africa	Record daily precipitation	2.5 mm (0.10 in)	15 of 100 (Routine)
Eversleigh	Australia	Record daily precipitation	8.6 mm (0.34 in)	14 of 100 (Routine)
Lakefield	Canada	Record high minimum temperature	18.9 C (66.0 F)	14 of 100 (Routine)
Stellenbosch (Tnk)	South Africa	Record daily precipitation	20.6 mm (0.8 in)	14 of 100 (Routine)
Richmond C/K (Tnk)	South Africa	Record daily precipitation	20.1 mm (0.8 in)	14 of 100 (Routine)
Boorolong	Australia	Record daily precipitation	5.6 mm (0.22 in)	13 of 100 (Routine)
Lindsay	Canada	Record high maximum temperature	32.2 C (90.0 F)	13 of 100 (Routine)
Graaff Reinet	South Africa	Record daily precipitation	7.4 mm (0.29 in)	13 of 100 (Routine)
Gravenhurst	Canada	Record high maximum temperature	30.6 C (87.1 F)	12 of 100 (Routine)
Toronto	Canada	Record high maximum temperature	30.0 C (86.0 F)	12 of 100 (Routine)
Barraba Post Office	Australia	Record daily precipitation	7.9 mm (0.31 in)	11 of 100 (Routine)
Inverell Comparison	Australia	Record daily precipitation	8.1 mm (0.32 in)	10 of 100 (Routine)
Parry Sound	Canada	Record high maximum temperature	31.7 C (89.1 F)	10 of 100 (Routine)
Chicoutimi	Canada	Record high maximum temperature	31.7 C (89.1 F)	10 of 100 (Routine)
Chicoutimi	Canada	Record high minimum temperature	13.3 C (55.9 F)	10 of 100 (Routine)
Dartmouth	Australia	Record daily precipitation	4.1 mm (0.16 in)	9 of 100 (Routine)
Gunnee	Australia	Record daily precipitation	11.4 mm (0.4 in)	8 of 100 (Routine)
Kingston Queens U	Canada	Record high minimum temperature	15.6 C (60.1 F)	8 of 100 (Routine)

Counts by Type and Timescale

82 records

Records set or tied on 20 May 1911 by type: Highest daily maximum 24, Highest daily minimum 25, Heaviest daily rainfall 33.

Records on 20 May 1911 by type
Record type	Records
Highest daily maximum	24
Lowest daily maximum	0
Highest daily minimum	25
Lowest daily minimum	0
Heaviest daily rainfall	33
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 May 1911 by timescale: all-time 1, monthly 7, daily 74.

How Much Records Were Beaten By

70 broken records

Margins by which the 70 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 74.1. Ties are not counted.

Top 20 by Significance

20 May 1911

Top 20 records on 20 May 1911 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1911	George Airport, ZA	daily rain	86.6 mm (3.4 in)	74.1 mm (2.9 in)	23 years	50 of 100 (Notable)
20 May 1911	Springbok, ZA	daily rain	35.6 mm (1.4 in)	33.1 mm (1.3 in)	18 years	48 of 100 (Notable)
20 May 1911	Ladismith (Tnk), ZA	all-time rain	103.1 mm (4.1 in)	16.7 mm (0.7 in)	17 years	44 of 100 (Notable)
20 May 1911	Barrie, CA	daily high min	17.8 C (64.0 F)	6.1 C (11.0 F)	33 years	27 of 100 (Routine)
20 May 1911	Uniondale (Tnk), ZA	daily rain	33.8 mm (1.3 in)	20.3 mm (0.8 in)	18 years	27 of 100 (Routine)
20 May 1911	Stratford, CA	daily high min	19.4 C (66.9 F)	5.5 C (9.9 F)	33 years	25 of 100 (Routine)
20 May 1911	Woodstock, CA	daily high min	19.4 C (66.9 F)	5.5 C (9.9 F)	30 years	24 of 100 (Routine)
20 May 1911	Owen Sound, CA	monthly high min	21.1 C (70.0 F)	1.7 C (3.1 F)	22 years	22 of 100 (Routine)
20 May 1911	Owen Sound, CA	daily high max	35.6 C (96.1 F)	6.2 C (11.2 F)	31 years	21 of 100 (Routine)
20 May 1911	Brantford, CA	daily high min	19.4 C (66.9 F)	3.8 C (6.8 F)	33 years	21 of 100 (Routine)
20 May 1911	Quebec, CA	monthly high max	32.2 C (90.0 F)	1.1 C (2.0 F)	22 years	21 of 100 (Routine)
20 May 1911	Bredasdorp, ZA	daily rain	19.1 mm (0.8 in)	14.0 mm (0.6 in)	20 years	20 of 100 (Routine)
20 May 1911	Willowmore, ZA	daily rain	11.4 mm (0.4 in)	11.4 mm (0.4 in)	32 years	20 of 100 (Routine)
20 May 1911	Sterling, ZA	daily rain	12.7 mm (0.5 in)	12.4 mm (0.5 in)	32 years	20 of 100 (Routine)
20 May 1911	Aberdeen (Tnk), ZA	daily rain	12.7 mm (0.5 in)	12.7 mm (0.5 in)	29 years	20 of 100 (Routine)
20 May 1911	Warialda Post Office, AU	daily rain	13.7 mm (0.5 in)	12.9 mm (0.5 in)	31 years	20 of 100 (Routine)
20 May 1911	Yallaroi, AU	daily rain	8.9 mm (0.35 in)	8.9 mm (0.35 in)	30 years	20 of 100 (Routine)
20 May 1911	Portland, AU	daily rain	22.6 mm (0.9 in)	3.5 mm (0.14 in)	33 years	20 of 100 (Routine)
20 May 1911	Parry Sound, CA	monthly high min	18.9 C (66.0 F)	1.7 C (3.1 F)	16 years	20 of 100 (Routine)
20 May 1911	Beaufort West (Met), ZA	daily rain	17.3 mm (0.7 in)	11.2 mm (0.4 in)	18 years	20 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 1911

Records set or tied on this calendar date in each year from 1802 to 1911. 1911 had 82 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 1911-05-20: 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	60
10 to 20	7
20 to 30	1
30 to 40	1
40 to 50	0
50 to 60	0
60 to 70	0
70 to 80	1