Weather Records on 11 May 1963

984 weather records were set or tied worldwide on 11 May 1963. Highest significance: Grassmere, AU.

Key Facts for 11 May 1963

On 11 May 1963, 984 weather records were set or tied at long-record stations worldwide.
425 were record highs and 195 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 29 monthly and 955 daily.
Grassmere set a daily record precipitation of 80.5 mm (3.2 in) on 11 May 1963.
Across 156 earlier years (1814 to 2026) the same calendar date averaged 460 records.

Record Map

984 stations

984 station records on 11 May 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 May 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Grassmere	Australia	Record daily precipitation	80.5 mm (3.2 in)	61 of 100 (Major)
Hasanganj	India	Record daily precipitation	37.1 mm (1.5 in)	55 of 100 (Notable)
Sable Island	Canada	Record daily snowfall	12.7 cm (5.0 in)	53 of 100 (Notable)
Bar Harbor 3 NW	United States	Record daily snowfall	15.2 cm (6.0 in)	53 of 100 (Notable)
Purwa	India	Record daily precipitation	27.9 mm (1.1 in)	50 of 100 (Notable)
King River	Australia	Record daily precipitation	45.5 mm (1.8 in)	49 of 100 (Notable)
Montreal McGill	Canada	Record daily snowfall	19.6 cm (7.7 in)	49 of 100 (Notable)
Penugonda	India	Record daily precipitation	48.3 mm (1.9 in)	48 of 100 (Notable)
Sandila	India	Record daily precipitation	31.5 mm (1.2 in)	48 of 100 (Notable)
Berlin	United States	Record daily snowfall	15.2 cm (6.0 in)	47 of 100 (Notable)
Towanda 1 S	United States	Record daily precipitation	36.3 mm (1.4 in)	46 of 100 (Notable)
Dunkeld	South Africa	Record daily precipitation	41.0 mm (1.6 in)	44 of 100 (Notable)
Martinsdale 3 NNW	United States	Record daily precipitation	30.0 mm (1.2 in)	43 of 100 (Notable)
Angamacutiro	Mexico	Record low maximum temperature	22.8 C (73.0 F)	41 of 100 (Notable)
Verkeerdevlei (Pol)	South Africa	Record daily precipitation	28.5 mm (1.1 in)	41 of 100 (Notable)
Middelweg	South Africa	Record daily precipitation	55.0 mm (2.2 in)	41 of 100 (Notable)
Huntingdon	Canada	Record low maximum temperature	5.0 C (41.0 F)	40 of 100 (Notable)
Adilabad	India	Record daily precipitation	40.0 mm (1.6 in)	40 of 100 (Notable)
Sydney (Observatory Hill)	Australia	Record high minimum temperature	16.6 C (61.9 F)	39 of 100 (Notable)
Lamoille Ph	United States	Record daily precipitation	34.5 mm (1.4 in)	39 of 100 (Notable)
Nornalup	Australia	Record daily precipitation	71.1 mm (2.8 in)	38 of 100 (Notable)
Bharthana	India	Record daily precipitation	25.7 mm (1.0 in)	37 of 100 (Notable)
Yarima	South Africa	Record daily precipitation	31.0 mm (1.2 in)	36 of 100 (Notable)
Sac City	United States	Record daily precipitation	42.9 mm (1.7 in)	36 of 100 (Notable)
Port Hastings	Canada	Record low minimum temperature	-1.7 C (28.9 F)	35 of 100 (Notable)
Driefontein	South Africa	Record daily precipitation	37.5 mm (1.5 in)	35 of 100 (Notable)
Lewiston	United States	Record low maximum temperature	2.8 C (37.0 F)	35 of 100 (Notable)
Stanford	United States	Record daily precipitation	26.2 mm (1.0 in)	35 of 100 (Notable)
Gunnedah Pool	Australia	Record high minimum temperature	15.0 C (59.0 F)	34 of 100 (Routine)
Ouricuri	Brazil	Record daily precipitation	50.0 mm (2.0 in)	34 of 100 (Routine)
Port Hastings	Canada	Record low maximum temperature	3.3 C (37.9 F)	34 of 100 (Routine)
Schoongezicht	South Africa	Record daily precipitation	41.5 mm (1.6 in)	34 of 100 (Routine)
Unnao	India	Record daily precipitation	31.5 mm (1.2 in)	33 of 100 (Routine)
Celaya (Smn)	Mexico	Record low maximum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
Irapuato	Mexico	Record low maximum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Orland	United States	Record low maximum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Greenville Muni AP	United States	Record daily snowfall	13.0 cm (5.1 in)	33 of 100 (Routine)
Cascade 5 S	United States	Record daily precipitation	32.3 mm (1.3 in)	33 of 100 (Routine)
Honomu Mauka 138	United States	Record daily precipitation	143.8 mm (5.7 in)	33 of 100 (Routine)
Albany	Australia	Record daily precipitation	49.5 mm (1.9 in)	32 of 100 (Routine)
Woodfort	South Africa	Record daily precipitation	26.5 mm (1.0 in)	32 of 100 (Routine)
Saranac Lake	United States	Record low maximum temperature	2.8 C (37.0 F)	32 of 100 (Routine)
Northcliffe	Australia	Record daily precipitation	68.3 mm (2.7 in)	31 of 100 (Routine)
Roodepoort	South Africa	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Kafferskraal	South Africa	Record daily precipitation	25.0 mm (1.0 in)	31 of 100 (Routine)
Rooijantjiesfontein	South Africa	Record daily precipitation	31.7 mm (1.2 in)	31 of 100 (Routine)
East Park Rsvr	United States	Record low maximum temperature	10.0 C (50.0 F)	31 of 100 (Routine)
Grafton	United States	Record low maximum temperature	3.9 C (39.0 F)	31 of 100 (Routine)
Crosbyton	United States	Record high minimum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Cornwall	United States	Record low maximum temperature	6.1 C (43.0 F)	31 of 100 (Routine)
Lewistown AP	United States	Record daily precipitation	25.9 mm (1.0 in)	31 of 100 (Routine)
Steynsrus (Mun)	South Africa	Record daily precipitation	28.0 mm (1.1 in)	30 of 100 (Routine)
Lanquedoc	South Africa	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Potchefstroom;Braksp	South Africa	Record daily precipitation	37.0 mm (1.5 in)	30 of 100 (Routine)
Castle Rock	United States	Record high minimum temperature	13.9 C (57.0 F)	30 of 100 (Routine)
Lamar	United States	Record high minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Scott City	United States	Record high minimum temperature	19.4 C (66.9 F)	30 of 100 (Routine)
White Lake	United States	Record daily precipitation	27.4 mm (1.1 in)	30 of 100 (Routine)
Inverell Comparison	Australia	Record high maximum temperature	26.1 C (79.0 F)	29 of 100 (Routine)
Ventersburg (Mag)	South Africa	Record daily precipitation	33.5 mm (1.3 in)	29 of 100 (Routine)

Counts by Type and Timescale

984 records

Records set or tied on 11 May 1963 by type: Highest daily maximum 230, Lowest daily maximum 162, Highest daily minimum 195, Lowest daily minimum 33, Heaviest daily rainfall 336, Heaviest daily snowfall 25, Deepest snow cover 3.

Records on 11 May 1963 by type
Record type	Records
Highest daily maximum	230
Lowest daily maximum	162
Highest daily minimum	195
Lowest daily minimum	33
Heaviest daily rainfall	336
Heaviest daily snowfall	25
Deepest snow cover	3

Records on 11 May 1963 by timescale: all-time 0, monthly 29, daily 955.

How Much Records Were Beaten By

801 broken records

Margins by which the 801 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 153.0. Ties are not counted.

Top 20 by Significance

11 May 1963

Top 20 records on 11 May 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 May 1963	Grassmere, AU	daily rain	80.5 mm (3.2 in)	39.1 mm (1.5 in)	53 years	61 of 100 (Major)
11 May 1963	Hasanganj, IN	daily rain	37.1 mm (1.5 in)	33.5 mm (1.3 in)	44 years	55 of 100 (Notable)
11 May 1963	Sable Island, CA	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	71 years	53 of 100 (Notable)
11 May 1963	Bar Harbor 3 NW, US	monthly snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	56 years	53 of 100 (Notable)
11 May 1963	Purwa, IN	daily rain	27.9 mm (1.1 in)	22.1 mm (0.9 in)	36 years	50 of 100 (Notable)
11 May 1963	King River, AU	daily rain	45.5 mm (1.8 in)	24.4 mm (1.0 in)	48 years	49 of 100 (Notable)
11 May 1963	Montreal McGill, CA	monthly snowfall	19.6 cm (7.7 in)	15.3 cm (6.0 in)	0 years	49 of 100 (Notable)
11 May 1963	Penugonda, IN	daily rain	48.3 mm (1.9 in)	42.5 mm (1.7 in)	44 years	48 of 100 (Notable)
11 May 1963	Sandila, IN	daily rain	31.5 mm (1.2 in)	28.5 mm (1.1 in)	45 years	48 of 100 (Notable)
11 May 1963	Berlin, US	monthly snowfall	15.2 cm (6.0 in)	12.7 cm (5.0 in)	17 years	47 of 100 (Notable)
11 May 1963	Towanda 1 S, US	daily rain	36.3 mm (1.4 in)	22.8 mm (0.9 in)	42 years	46 of 100 (Notable)
11 May 1963	Dunkeld, ZA	daily rain	41.0 mm (1.6 in)	31.6 mm (1.2 in)	12 years	44 of 100 (Notable)
11 May 1963	Martinsdale 3 NNW, US	daily rain	30.0 mm (1.2 in)	17.3 mm (0.7 in)	60 years	43 of 100 (Notable)
11 May 1963	Angamacutiro, MX	daily low max	22.8 C (73.0 F)	7.2 C (13.0 F)	28 years	41 of 100 (Notable)
11 May 1963	Verkeerdevlei (Pol), ZA	daily rain	28.5 mm (1.1 in)	21.4 mm (0.8 in)	28 years	41 of 100 (Notable)
11 May 1963	Middelweg, ZA	daily rain	55.0 mm (2.2 in)	39.0 mm (1.5 in)	12 years	41 of 100 (Notable)
11 May 1963	Huntingdon, CA	daily low max	5.0 C (41.0 F)	3.9 C (7.0 F)	84 years	40 of 100 (Notable)
11 May 1963	Adilabad, IN	daily rain	40.0 mm (1.6 in)	40.0 mm (1.6 in)	30 years	40 of 100 (Notable)
11 May 1963	Sydney (Observatory Hill), AU	daily high min	16.6 C (61.9 F)	1.3 C (2.3 F)	81 years	39 of 100 (Notable)
11 May 1963	Lamoille Ph, US	daily rain	34.5 mm (1.4 in)	19.8 mm (0.8 in)	29 years	39 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

1814 to 1963

Records set or tied on this calendar date in each year from 1814 to 1963. 1963 had 984 records.

Counts for years before the ledger starts come from the same station rules.

Records on 05-11 in each year
Year	Records
1814	3
1832	1
1836	3
1837	1
1838	1
1848	2
1856	1
1860	2
1865	1
1867	1
1869	1
1872	1
1874	2
1879	2
1880	1
1881	5
1883	3
1884	2
1885	1
1886	2
1887	1
1888	1
1889	2
1892	1
1893	3
1894	2
1895	4
1896	3
1897	6
1898	5
1900	7
1901	9
1902	6
1903	7
1904	6
1905	12
1906	21
1907	44
1908	9
1909	12
1910	16
1911	99
1912	21
1913	20
1914	20
1915	16
1916	22
1917	40
1918	54
1919	56
1920	181
1921	58
1922	61
1923	111
1924	239
1925	410
1926	472
1927	318
1928	252
1929	126
1930	380
1931	254
1932	170
1933	429
1934	332
1935	276
1936	363
1937	170
1938	141
1939	213
1940	340
1941	411
1942	389
1943	646
1944	408
1945	483
1946	747
1947	480
1948	407
1949	451
1950	285
1951	395
1952	629
1953	686
1954	492
1955	235
1956	942
1957	439
1958	499
1959	575
1960	809
1961	663
1962	670
1963	984
1964	299
1965	356
1966	992
1967	974
1968	909
1969	349
1970	764
1971	565
1972	673
1973	429
1974	795
1975	383
1976	509
1977	836
1978	1,070
1979	1,239
1980	693
1981	1,298
1982	624
1983	930
1984	666
1985	835
1986	684
1987	1,247
1988	485
1989	952
1990	935
1991	990
1992	728
1993	1,088
1994	633
1995	1,244
1996	1,088
1997	1,033
1998	1,315
1999	1,052
2000	1,286
2001	848
2002	845
2003	1,321
2004	834
2005	944
2006	822
2007	833
2008	1,015
2009	605
2010	1,292
2011	1,414
2012	1,181
2013	615
2014	662
2015	1,038
2016	497
2017	546
2018	988
2019	915
2020	1,068
2021	590
2022	1,470
2023	390
2024	579
2025	1,104
2026	797

Download the Data

Data for records on 1963-05-11: 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 20	759
20 to 40	32
40 to 60	5
60 to 80	1
80 to 100	0
100 to 120	1
120 to 140	2
140 to 160	1