Weather Records on 15 September 1964

839 weather records were set or tied worldwide on 15 September 1964. Highest significance: Mamanguape, BR.

Key Facts for 15 September 1964

On 15 September 1964, 839 weather records were set or tied at long-record stations worldwide.
47 were record highs and 430 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 25 monthly and 814 daily.
Mamanguape set a monthly record daily precipitation of 99.1 mm (3.9 in) on 15 September 1964.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 410 records.

Record Map

839 stations

839 station records on 15 September 1964 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1964: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mamanguape	Brazil	Record daily precipitation	99.1 mm (3.9 in)	65 of 100 (Major)
Manubie (Bos)	South Africa	Record daily precipitation	207.0 mm (8.1 in)	63 of 100 (Major)
Jath	India	Record daily precipitation	146.0 mm (5.7 in)	62 of 100 (Major)
Snowflake	United States	Record daily precipitation	40.6 mm (1.6 in)	58 of 100 (Notable)
Letjiebos (Sar)	South Africa	Record daily precipitation	102.0 mm (4.0 in)	57 of 100 (Notable)
Komga (Pol)	South Africa	Record daily precipitation	54.0 mm (2.1 in)	56 of 100 (Notable)
Sao Miguel Dos Campos	Brazil	Record daily precipitation	48.4 mm (1.9 in)	55 of 100 (Notable)
Beaufort West (Met)	South Africa	Record daily precipitation	58.5 mm (2.3 in)	55 of 100 (Notable)
Kentani (Bos)	South Africa	Record daily precipitation	161.5 mm (6.4 in)	55 of 100 (Notable)
Sindgi	India	Record daily precipitation	88.4 mm (3.5 in)	53 of 100 (Notable)
Rhenostervlei	South Africa	Record daily precipitation	36.0 mm (1.4 in)	51 of 100 (Notable)
Athani	India	Record daily precipitation	100.0 mm (3.9 in)	50 of 100 (Notable)
Mundagod	India	Record daily precipitation	119.4 mm (4.7 in)	50 of 100 (Notable)
Willowvale (Tnk)	South Africa	Record daily precipitation	137.0 mm (5.4 in)	50 of 100 (Notable)
Roosevelt 1 S	United States	Record daily precipitation	37.8 mm (1.5 in)	50 of 100 (Notable)
Gouna (Bos)	South Africa	Record daily precipitation	67.0 mm (2.6 in)	49 of 100 (Notable)
Mesa	United States	Record daily precipitation	30.2 mm (1.2 in)	49 of 100 (Notable)
Kleinfontein	South Africa	Record daily precipitation	65.8 mm (2.6 in)	47 of 100 (Notable)
Eldorado	United States	Record daily precipitation	57.2 mm (2.3 in)	47 of 100 (Notable)
De Hoop	South Africa	Record daily precipitation	43.5 mm (1.7 in)	46 of 100 (Notable)
Indlunkulu (Bos)	South Africa	Record daily precipitation	36.0 mm (1.4 in)	46 of 100 (Notable)
Sierra Ancha	United States	Record daily precipitation	45.0 mm (1.8 in)	46 of 100 (Notable)
Chatillon-Sur-Seine	France	Record daily precipitation	39.8 mm (1.6 in)	45 of 100 (Notable)
Klipbanksfontein	South Africa	Record daily precipitation	77.2 mm (3.0 in)	45 of 100 (Notable)
Hubli	India	Record daily precipitation	64.2 mm (2.5 in)	44 of 100 (Notable)
Woodville (Bos)	South Africa	Record daily precipitation	63.0 mm (2.5 in)	44 of 100 (Notable)
Rapalle	India	Record daily precipitation	76.2 mm (3.0 in)	43 of 100 (Notable)
Invergwali	South Africa	Record daily precipitation	27.3 mm (1.1 in)	43 of 100 (Notable)
Heavitree, Estcourt	South Africa	Record daily precipitation	39.9 mm (1.6 in)	43 of 100 (Notable)
Belleville	Canada	Record low minimum temperature	1.7 C (35.1 F)	41 of 100 (Notable)
Deuselbach	Germany	Record daily precipitation	29.3 mm (1.2 in)	41 of 100 (Notable)
Sampagaon-Bailh	India	Record daily precipitation	58.0 mm (2.3 in)	41 of 100 (Notable)
Ganado	United States	Record daily precipitation	27.7 mm (1.1 in)	41 of 100 (Notable)
Pembroke Eddy Match	Canada	Record low maximum temperature	11.1 C (52.0 F)	40 of 100 (Notable)
Roermond	Netherlands	Record daily precipitation	32.6 mm (1.3 in)	40 of 100 (Notable)
Grootfontein	South Africa	Record daily precipitation	26.0 mm (1.0 in)	40 of 100 (Notable)
Natal	Brazil	Record daily precipitation	28.6 mm (1.1 in)	39 of 100 (Notable)
Bernkastel-Kues	Germany	Record daily precipitation	27.0 mm (1.1 in)	39 of 100 (Notable)
Raibag	India	Record daily precipitation	62.5 mm (2.5 in)	39 of 100 (Notable)
Bapatla	India	Record daily precipitation	105.0 mm (4.1 in)	38 of 100 (Notable)
Dulce	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Knysna (Tnk)	South Africa	Record daily precipitation	56.0 mm (2.2 in)	37 of 100 (Notable)
George Airport	South Africa	Record daily precipitation	64.5 mm (2.5 in)	37 of 100 (Notable)
Fort Frances	Canada	Record low minimum temperature	-3.9 C (25.0 F)	36 of 100 (Notable)
Zeekoevlei	South Africa	Record daily precipitation	45.5 mm (1.8 in)	36 of 100 (Notable)
Stephens Rch	United States	Record daily precipitation	45.0 mm (1.8 in)	36 of 100 (Notable)
Trier-Zewen	Germany	Record daily precipitation	31.3 mm (1.2 in)	35 of 100 (Notable)
Lakenvlei	South Africa	Record daily precipitation	30.5 mm (1.2 in)	35 of 100 (Notable)
Beatrice	Canada	Record low minimum temperature	-2.8 C (27.0 F)	34 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record low maximum temperature	15.5 C (59.9 F)	34 of 100 (Routine)
Phoenix Indian School	United States	Record daily precipitation	37.6 mm (1.5 in)	34 of 100 (Routine)
Ashland	United States	Record low minimum temperature	0.0 C (32.0 F)	34 of 100 (Routine)
Hereford	United States	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Skovorodino	Russia	Record daily precipitation	33.0 mm (1.3 in)	33 of 100 (Routine)
Concordia (Bos)	South Africa	Record daily precipitation	51.5 mm (2.0 in)	33 of 100 (Routine)
Lottering (Bos)	South Africa	Record daily precipitation	75.0 mm (3.0 in)	33 of 100 (Routine)
Cegcuana (Bos)	South Africa	Record daily precipitation	63.5 mm (2.5 in)	33 of 100 (Routine)
Glen Alphen	South Africa	Record daily precipitation	26.5 mm (1.0 in)	33 of 100 (Routine)
Elsinore	United States	Record low minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Del Norte 3ENE	United States	Record low maximum temperature	13.9 C (57.0 F)	33 of 100 (Routine)

Counts by Type and Timescale

839 records

Records set or tied on 15 September 1964 by type: Highest daily maximum 12, Lowest daily maximum 104, Highest daily minimum 35, Lowest daily minimum 326, Heaviest daily rainfall 361, Deepest snow cover 1.

Records on 15 September 1964 by type
Record type	Records
Highest daily maximum	12
Lowest daily maximum	104
Highest daily minimum	35
Lowest daily minimum	326
Heaviest daily rainfall	361
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 15 September 1964 by timescale: all-time 0, monthly 25, daily 814.

How Much Records Were Beaten By

716 broken records

Margins by which the 716 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 86.1. Ties are not counted.

Top 20 by Significance

15 September 1964

Top 20 records on 15 September 1964 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1964	Mamanguape, BR	monthly rain	99.1 mm (3.9 in)	36.6 mm (1.4 in)	35 years	65 of 100 (Major)
15 September 1964	Manubie (Bos), ZA	monthly rain	207.0 mm (8.1 in)	76.7 mm (3.0 in)	34 years	63 of 100 (Major)
15 September 1964	Jath, IN	daily rain	146.0 mm (5.7 in)	86.1 mm (3.4 in)	56 years	62 of 100 (Major)
15 September 1964	Snowflake, US	daily rain	40.6 mm (1.6 in)	35.3 mm (1.4 in)	53 years	58 of 100 (Notable)
15 September 1964	Letjiebos (Sar), ZA	monthly rain	102.0 mm (4.0 in)	58.5 mm (2.3 in)	7 years	57 of 100 (Notable)
15 September 1964	Komga (Pol), ZA	daily rain	54.0 mm (2.1 in)	35.2 mm (1.4 in)	63 years	56 of 100 (Notable)
15 September 1964	Sao Miguel Dos Campos, BR	daily rain	48.4 mm (1.9 in)	32.9 mm (1.3 in)	39 years	55 of 100 (Notable)
15 September 1964	Beaufort West (Met), ZA	daily rain	58.5 mm (2.3 in)	24.0 mm (0.9 in)	81 years	55 of 100 (Notable)
15 September 1964	Kentani (Bos), ZA	monthly rain	161.5 mm (6.4 in)	57.4 mm (2.3 in)	11 years	55 of 100 (Notable)
15 September 1964	Sindgi, IN	daily rain	88.4 mm (3.5 in)	52.3 mm (2.1 in)	61 years	53 of 100 (Notable)
15 September 1964	Rhenostervlei, ZA	daily rain	36.0 mm (1.4 in)	33.0 mm (1.3 in)	29 years	51 of 100 (Notable)
15 September 1964	Athani, IN	daily rain	100.0 mm (3.9 in)	64.2 mm (2.5 in)	36 years	50 of 100 (Notable)
15 September 1964	Mundagod, IN	monthly rain	119.4 mm (4.7 in)	21.4 mm (0.8 in)	37 years	50 of 100 (Notable)
15 September 1964	Willowvale (Tnk), ZA	monthly rain	137.0 mm (5.4 in)	22.7 mm (0.9 in)	67 years	50 of 100 (Notable)
15 September 1964	Roosevelt 1 S, US	daily rain	37.8 mm (1.5 in)	37.0 mm (1.5 in)	33 years	50 of 100 (Notable)
15 September 1964	Gouna (Bos), ZA	daily rain	67.0 mm (2.6 in)	43.9 mm (1.7 in)	32 years	49 of 100 (Notable)
15 September 1964	Mesa, US	daily rain	30.2 mm (1.2 in)	26.6 mm (1.0 in)	62 years	49 of 100 (Notable)
15 September 1964	Kleinfontein, ZA	daily rain	65.8 mm (2.6 in)	40.9 mm (1.6 in)	17 years	47 of 100 (Notable)
15 September 1964	Eldorado, US	daily rain	57.2 mm (2.3 in)	47.0 mm (1.9 in)	6 years	47 of 100 (Notable)
15 September 1964	De Hoop, ZA	monthly rain	43.5 mm (1.7 in)	18.1 mm (0.7 in)	14 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

1797 to 1964

Records set or tied on this calendar date in each year from 1797 to 1964. 1964 had 839 records.

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

Records on 09-15 in each year
Year	Records
1797	1
1803	1
1806	2
1810	1
1816	1
1818	1
1823	2
1833	1
1836	1
1837	2
1839	1
1841	1
1848	1
1850	1
1851	1
1854	2
1856	1
1857	1
1859	1
1864	1
1865	2
1866	1
1867	2
1868	1
1869	1
1872	1
1873	2
1876	2
1877	2
1880	1
1881	1
1882	6
1884	3
1885	4
1886	2
1887	3
1888	1
1889	5
1890	1
1894	4
1895	1
1897	1
1898	3
1899	3
1900	1
1901	12
1902	7
1903	31
1904	30
1905	16
1906	6
1907	7
1908	16
1909	16
1910	2
1911	40
1912	64
1913	43
1914	18
1915	94
1916	44
1917	50
1918	50
1919	52
1920	164
1921	122
1922	53
1923	193
1924	103
1925	112
1926	134
1927	539
1928	86
1929	99
1930	235
1931	422
1932	295
1933	322
1934	351
1935	463
1936	460
1937	337
1938	247
1939	1,098
1940	181
1941	276
1942	278
1943	360
1944	396
1945	418
1946	411
1947	621
1948	557
1949	523
1950	750
1951	283
1952	455
1953	400
1954	518
1955	532
1956	646
1957	449
1958	294
1959	844
1960	410
1961	586
1962	557
1963	455
1964	839
1965	614
1966	534
1967	578
1968	429
1969	362
1970	1,157
1971	598
1972	356
1973	774
1974	386
1975	739
1976	667
1977	400
1978	628
1979	1,022
1980	563
1981	613
1982	1,315
1983	756
1984	766
1985	764
1986	928
1987	719
1988	818
1989	955
1990	911
1991	1,165
1992	919
1993	2,227
1994	1,363
1995	723
1996	1,212
1997	1,177
1998	1,768
1999	858
2000	1,175
2001	837
2002	1,212
2003	855
2004	893
2005	1,123
2006	1,042
2007	946
2008	1,153
2009	773
2010	913
2011	1,170
2012	568
2013	854
2014	443
2015	997
2016	988
2017	825
2018	874
2019	538
2020	785
2021	467
2022	392
2023	507
2024	681
2025	503
2026	779

Download the Data

Data for records on 1964-09-15: 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 2026-10-18. Last revised 18 October 2026 (2026-10-18).

Margin	Records
0 to 20	660
20 to 40	42
40 to 60	11
60 to 80	2
80 to 100	1