Weather Records on 11 August 1964

677 weather records were set or tied worldwide on 11 August 1964. Highest significance: Cottbus, DE.

Key Facts for 11 August 1964

On 11 August 1964, 677 weather records were set or tied at long-record stations worldwide.
142 were record highs and 246 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 14 monthly and 659 daily.
Cottbus set a daily record precipitation of 79.2 mm (3.1 in) on 11 August 1964.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 459 records.

Record Map

677 stations

677 station records on 11 August 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cottbus	Germany	Record daily precipitation	79.2 mm (3.1 in)	61 of 100 (Major)
Montagu (Pol)	South Africa	Record daily precipitation	52.0 mm (2.0 in)	61 of 100 (Major)
Zerbst	Germany	Record daily precipitation	59.0 mm (2.3 in)	58 of 100 (Notable)
Welland	Canada	Record daily precipitation	57.7 mm (2.3 in)	56 of 100 (Notable)
Magdeburg	Germany	Record daily precipitation	48.3 mm (1.9 in)	56 of 100 (Notable)
G. Udayagiri	India	Record daily precipitation	114.3 mm (4.5 in)	56 of 100 (Notable)
Wittenberg	Germany	Record daily precipitation	52.6 mm (2.1 in)	53 of 100 (Notable)
Halle	Germany	Record daily precipitation	51.8 mm (2.0 in)	51 of 100 (Notable)
Korsakov	Russia	Record daily precipitation	32.0 mm (1.3 in)	51 of 100 (Notable)
Aschersleben	Germany	Record daily precipitation	48.7 mm (1.9 in)	50 of 100 (Notable)
Garsebach Bei Meissen	Germany	Record daily precipitation	46.3 mm (1.8 in)	50 of 100 (Notable)
Wolfsburg (Sudwest)	Germany	Record daily precipitation	39.2 mm (1.5 in)	50 of 100 (Notable)
Junagadh	India	Record daily precipitation	125.2 mm (4.9 in)	50 of 100 (Notable)
Rico	United States	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Bad Lauchstadt	Germany	Record daily precipitation	47.2 mm (1.9 in)	48 of 100 (Notable)
Brandenburg-Gorden	Germany	Record daily precipitation	47.9 mm (1.9 in)	48 of 100 (Notable)
Durham	Canada	Record daily precipitation	41.1 mm (1.6 in)	47 of 100 (Notable)
Toronto Agincourt	Canada	Record daily precipitation	59.9 mm (2.4 in)	47 of 100 (Notable)
Bernburg/Saale (Nord)	Germany	Record daily precipitation	55.9 mm (2.2 in)	47 of 100 (Notable)
Potsdam	Germany	Record daily precipitation	41.6 mm (1.6 in)	46 of 100 (Notable)
Matjiesrivier (Skl)	South Africa	Record daily precipitation	47.5 mm (1.9 in)	45 of 100 (Notable)
Palair	India	Record daily precipitation	75.0 mm (3.0 in)	44 of 100 (Notable)
Narsingpur	India	Record daily precipitation	83.8 mm (3.3 in)	44 of 100 (Notable)
Woodstock	Canada	Record daily precipitation	47.5 mm (1.9 in)	43 of 100 (Notable)
Artern	Germany	Record daily precipitation	53.6 mm (2.1 in)	43 of 100 (Notable)
Minas Nuevas	Mexico	Record low minimum temperature	15.0 C (59.0 F)	43 of 100 (Notable)
Niagara Falls Ont Hydro	Canada	Record daily precipitation	49.5 mm (1.9 in)	42 of 100 (Notable)
Rust-En-Vrede	South Africa	Record daily precipitation	41.1 mm (1.6 in)	42 of 100 (Notable)
St Catharines Cda	Canada	Record daily precipitation	45.7 mm (1.8 in)	40 of 100 (Notable)
Campbellford	Canada	Record daily precipitation	45.0 mm (1.8 in)	40 of 100 (Notable)
Gorlitz	Germany	Record daily precipitation	56.7 mm (2.2 in)	40 of 100 (Notable)
Leipzig-Holzhausen	Germany	Record daily precipitation	43.1 mm (1.7 in)	40 of 100 (Notable)
Lichtentanne	Germany	Record low maximum temperature	14.1 C (57.4 F)	40 of 100 (Notable)
Wara	India	Record daily precipitation	72.3 mm (2.8 in)	40 of 100 (Notable)
Itchapuram	India	Record daily precipitation	112.4 mm (4.4 in)	40 of 100 (Notable)
Wien	Austria	Record low maximum temperature	15.3 C (59.5 F)	39 of 100 (Notable)
Praha-Klementinum	Czech Republic	Record low maximum temperature	16.0 C (60.8 F)	39 of 100 (Notable)
Yellapur	India	Record daily precipitation	134.6 mm (5.3 in)	39 of 100 (Notable)
Bateman Rch	United States	Record daily precipitation	47.0 mm (1.9 in)	39 of 100 (Notable)
St Catharines	Canada	Record daily precipitation	42.4 mm (1.7 in)	38 of 100 (Notable)
Belleville	Canada	Record daily precipitation	48.0 mm (1.9 in)	38 of 100 (Notable)
Bucuresti Filaret	Romania	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Wilsons Promontory Lighthouse	Australia	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Huntingdon	Canada	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
Lindenberg	Germany	Record daily precipitation	30.9 mm (1.2 in)	36 of 100 (Notable)
Monroe	United States	Record daily precipitation	53.8 mm (2.1 in)	36 of 100 (Notable)
Batesville	United States	Record daily precipitation	95.3 mm (3.8 in)	36 of 100 (Notable)
Batesburg	United States	Record daily precipitation	41.4 mm (1.6 in)	36 of 100 (Notable)
Kotarh	India	Record daily precipitation	68.6 mm (2.7 in)	35 of 100 (Notable)
Ambalapuza	India	Record daily precipitation	89.4 mm (3.5 in)	35 of 100 (Notable)
Wetumpka	United States	Record daily precipitation	99.6 mm (3.9 in)	35 of 100 (Notable)
Foster (Post Office)	Australia	Record daily precipitation	31.8 mm (1.3 in)	34 of 100 (Routine)
Ponce 4 E	Puerto Rico [United States]	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Healdton 3 E	United States	Record high minimum temperature	28.3 C (82.9 F)	34 of 100 (Routine)
Trenton Ont Hydro	Canada	Record daily precipitation	53.8 mm (2.1 in)	33 of 100 (Routine)
Doberlug-Kirchhain	Germany	Record daily precipitation	62.4 mm (2.5 in)	33 of 100 (Routine)
Phulbani	India	Record daily precipitation	69.0 mm (2.7 in)	33 of 100 (Routine)
Riversdale	South Africa	Record daily precipitation	31.0 mm (1.2 in)	33 of 100 (Routine)
Lumpkin 2 SE	United States	Record daily precipitation	31.8 mm (1.3 in)	33 of 100 (Routine)
Pundi	India	Record daily precipitation	53.3 mm (2.1 in)	32 of 100 (Routine)

Counts by Type and Timescale

677 records

Records set or tied on 11 August 1964 by type: Highest daily maximum 36, Lowest daily maximum 137, Highest daily minimum 106, Lowest daily minimum 109, Heaviest daily rainfall 289.

Records on 11 August 1964 by type
Record type	Records
Highest daily maximum	36
Lowest daily maximum	137
Highest daily minimum	106
Lowest daily minimum	109
Heaviest daily rainfall	289
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 August 1964 by timescale: all-time 4, monthly 14, daily 659.

How Much Records Were Beaten By

532 broken records

Margins by which the 532 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 89.6. Ties are not counted.

Top 20 by Significance

11 August 1964

Top 20 records on 11 August 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 1964	Cottbus, DE	daily rain	79.2 mm (3.1 in)	35.4 mm (1.4 in)	47 years	61 of 100 (Major)
11 August 1964	Montagu (Pol), ZA	daily rain	52.0 mm (2.0 in)	37.3 mm (1.5 in)	64 years	61 of 100 (Major)
11 August 1964	Zerbst, DE	daily rain	59.0 mm (2.3 in)	45.5 mm (1.8 in)	37 years	58 of 100 (Notable)
11 August 1964	Welland, CA	daily rain	57.7 mm (2.3 in)	34.6 mm (1.4 in)	46 years	56 of 100 (Notable)
11 August 1964	Magdeburg, DE	daily rain	48.3 mm (1.9 in)	20.6 mm (0.8 in)	37 years	56 of 100 (Notable)
11 August 1964	G. Udayagiri, IN	daily rain	114.3 mm (4.5 in)	86.4 mm (3.4 in)	39 years	56 of 100 (Notable)
11 August 1964	Wittenberg, DE	daily rain	52.6 mm (2.1 in)	43.0 mm (1.7 in)	21 years	53 of 100 (Notable)
11 August 1964	Halle, DE	daily rain	51.8 mm (2.0 in)	36.7 mm (1.4 in)	19 years	51 of 100 (Notable)
11 August 1964	Korsakov, RU	daily rain	32.0 mm (1.3 in)	24.9 mm (1.0 in)	65 years	51 of 100 (Notable)
11 August 1964	Aschersleben, DE	daily rain	48.7 mm (1.9 in)	22.7 mm (0.9 in)	37 years	50 of 100 (Notable)
11 August 1964	Garsebach Bei Meissen, DE	daily rain	46.3 mm (1.8 in)	23.0 mm (0.9 in)	39 years	50 of 100 (Notable)
11 August 1964	Wolfsburg (Sudwest), DE	daily rain	39.2 mm (1.5 in)	32.7 mm (1.3 in)	26 years	50 of 100 (Notable)
11 August 1964	Junagadh, IN	daily rain	125.2 mm (4.9 in)	89.6 mm (3.5 in)	16 years	50 of 100 (Notable)
11 August 1964	Rico, US	daily rain	38.1 mm (1.5 in)	22.9 mm (0.9 in)	18 years	50 of 100 (Notable)
11 August 1964	Bad Lauchstadt, DE	daily rain	47.2 mm (1.9 in)	30.5 mm (1.2 in)	6 years	48 of 100 (Notable)
11 August 1964	Brandenburg-Gorden, DE	daily rain	47.9 mm (1.9 in)	37.3 mm (1.5 in)	10 years	48 of 100 (Notable)
11 August 1964	Durham, CA	daily rain	41.1 mm (1.6 in)	22.0 mm (0.9 in)	67 years	47 of 100 (Notable)
11 August 1964	Toronto Agincourt, CA	daily rain	59.9 mm (2.4 in)	37.0 mm (1.5 in)	29 years	47 of 100 (Notable)
11 August 1964	Bernburg/Saale (Nord), DE	monthly rain	55.9 mm (2.2 in)	11.2 mm (0.4 in)	49 years	47 of 100 (Notable)
11 August 1964	Potsdam, DE	daily rain	41.6 mm (1.6 in)	19.6 mm (0.8 in)	37 years	46 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

1793 to 1964

Records set or tied on this calendar date in each year from 1793 to 1964. 1964 had 677 records.

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

Records on 08-11 in each year
Year	Records
1793	1
1796	1
1811	1
1815	2
1838	1
1839	1
1841	1
1851	1
1855	1
1858	1
1861	2
1862	1
1863	1
1864	6
1865	1
1866	6
1869	4
1871	1
1875	1
1879	2
1881	1
1883	1
1885	1
1888	1
1889	4
1890	4
1891	1
1892	4
1893	1
1894	1
1895	2
1896	5
1897	3
1898	2
1899	3
1900	4
1901	4
1902	13
1903	12
1904	19
1905	9
1906	6
1907	8
1908	10
1909	41
1910	9
1911	24
1912	46
1913	43
1914	26
1915	27
1916	64
1917	217
1918	29
1919	18
1920	54
1921	201
1922	98
1923	80
1924	149
1925	219
1926	140
1927	190
1928	174
1929	354
1930	471
1931	453
1932	281
1933	416
1934	620
1935	499
1936	541
1937	356
1938	315
1939	389
1940	359
1941	807
1942	390
1943	345
1944	936
1945	401
1946	419
1947	709
1948	306
1949	471
1950	320
1951	296
1952	417
1953	283
1954	536
1955	319
1956	457
1957	305
1958	494
1959	337
1960	461
1961	429
1962	662
1963	493
1964	677
1965	793
1966	1,037
1967	1,071
1968	619
1969	533
1970	526
1971	711
1972	823
1973	451
1974	596
1975	753
1976	529
1977	845
1978	433
1979	797
1980	929
1981	645
1982	1,232
1983	1,095
1984	822
1985	804
1986	563
1987	885
1988	1,119
1989	983
1990	760
1991	822
1992	928
1993	840
1994	1,173
1995	1,324
1996	1,147
1997	1,512
1998	1,232
1999	1,152
2000	924
2001	811
2002	1,152
2003	1,601
2004	1,478
2005	1,031
2006	896
2007	1,428
2008	945
2009	836
2010	2,289
2011	1,106
2012	953
2013	470
2014	556
2015	696
2016	1,340
2017	619
2018	861
2019	758
2020	688
2021	834
2022	661
2023	757
2024	643
2025	722
2026	765

Download the Data

Data for records on 1964-08-11: 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	473
20 to 40	48
40 to 60	7
60 to 80	2
80 to 100	2