Weather Records on 17 September 1963

297 weather records were set or tied worldwide on 17 September 1963. Highest significance: Olowalu 296.1, US.

Key Facts for 17 September 1963

On 17 September 1963, 297 weather records were set or tied at long-record stations worldwide.
55 were record highs and 75 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 6 monthly and 291 daily.
Olowalu 296.1 set a monthly record daily precipitation of 60.5 mm (2.4 in) on 17 September 1963.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 423 records.

Record Map

297 stations

297 station records on 17 September 1963 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1963: highest significance records shown on the map
Station	Country	Type	Value	Significance
Olowalu 296.1	United States	Record daily precipitation	60.5 mm (2.4 in)	65 of 100 (Major)
Kaanapali AP 453.1	United States	Record daily precipitation	48.3 mm (1.9 in)	60 of 100 (Major)
Corona	United States	Record daily precipitation	33.0 mm (1.3 in)	59 of 100 (Notable)
San Sebastian - Igueldo	Spain	Record daily precipitation	149.8 mm (5.9 in)	50 of 100 (Notable)
Guthrie 5S	United States	Record daily precipitation	93.0 mm (3.7 in)	48 of 100 (Notable)
Waikapu 390	United States	Record daily precipitation	44.5 mm (1.8 in)	45 of 100 (Notable)
Lafayette Rgnl AP	United States	Record daily precipitation	150.4 mm (5.9 in)	45 of 100 (Notable)
Maryville 2E	United States	Record daily precipitation	62.7 mm (2.5 in)	43 of 100 (Notable)
Moorestown 4 E	United States	Record daily precipitation	49.0 mm (1.9 in)	42 of 100 (Notable)
Willow City	United States	Record daily precipitation	27.2 mm (1.1 in)	42 of 100 (Notable)
Kahuku 912	United States	Record daily precipitation	29.2 mm (1.1 in)	42 of 100 (Notable)
Riverside Fire STN 3	United States	Record daily precipitation	32.3 mm (1.3 in)	41 of 100 (Notable)
Ewa Plantation 741	United States	Record low maximum temperature	25.0 C (77.0 F)	41 of 100 (Notable)
Newport Beach Harbor	United States	Record daily precipitation	27.7 mm (1.1 in)	39 of 100 (Notable)
San Bernardino F S 226	United States	Record daily precipitation	26.7 mm (1.1 in)	39 of 100 (Notable)
Koloa 936	United States	Record daily precipitation	35.6 mm (1.4 in)	38 of 100 (Notable)
Laguna Beach	United States	Record daily precipitation	29.7 mm (1.2 in)	36 of 100 (Notable)
Lahaina 361	United States	Record daily precipitation	59.7 mm (2.4 in)	36 of 100 (Notable)
Searchlight	United States	Record daily precipitation	26.4 mm (1.0 in)	35 of 100 (Notable)
Big Pines Park Fc83B	United States	Record daily precipitation	41.7 mm (1.6 in)	34 of 100 (Routine)
Tortosa - Observatorio del Ebr	Spain	Record daily precipitation	48.3 mm (1.9 in)	33 of 100 (Routine)
San Jacinto	United States	Record daily precipitation	30.2 mm (1.2 in)	33 of 100 (Routine)
Lytle Creek Rs	United States	Record daily precipitation	57.9 mm (2.3 in)	32 of 100 (Routine)
Honomu Makai 143	United States	Record daily precipitation	66.0 mm (2.6 in)	32 of 100 (Routine)
Pathardi	India	Record daily precipitation	65.5 mm (2.6 in)	29 of 100 (Routine)
Crookston NW Exp STN	United States	Record high minimum temperature	19.4 C (66.9 F)	28 of 100 (Routine)
Freeport 2 NW	United States	Record daily precipitation	83.8 mm (3.3 in)	28 of 100 (Routine)
Hatteras	United States	Record low minimum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Bagdad	United States	Record daily precipitation	41.1 mm (1.6 in)	27 of 100 (Routine)
Honokohua 493	United States	Record daily precipitation	30.5 mm (1.2 in)	27 of 100 (Routine)
Kapalama 773	United States	Record daily precipitation	39.6 mm (1.6 in)	27 of 100 (Routine)
Rio Grande (Smn)	Mexico	Record low minimum temperature	1.7 C (35.1 F)	26 of 100 (Routine)
Union City 3 SE	United States	Record daily precipitation	40.1 mm (1.6 in)	26 of 100 (Routine)
Ipswich	United States	Record high minimum temperature	17.8 C (64.0 F)	26 of 100 (Routine)
Weyerhaeuser 1N	United States	Record daily precipitation	28.2 mm (1.1 in)	26 of 100 (Routine)
Palakonda	India	Record daily precipitation	58.0 mm (2.3 in)	25 of 100 (Routine)
Wellton	United States	Record daily precipitation	25.7 mm (1.0 in)	25 of 100 (Routine)
Barstow	United States	Record low maximum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Redlands	United States	Record low maximum temperature	18.9 C (66.0 F)	25 of 100 (Routine)
Yorba Linda	United States	Record daily precipitation	25.4 mm (1.0 in)	25 of 100 (Routine)
Morgan City	United States	Record daily precipitation	73.9 mm (2.9 in)	25 of 100 (Routine)
New Iberia AP - Acadiana Rgnl	United States	Record daily precipitation	114.3 mm (4.5 in)	25 of 100 (Routine)
Oregon	United States	Record daily precipitation	40.6 mm (1.6 in)	25 of 100 (Routine)
Grand Forks UNIV (NWS)	United States	Record high minimum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Mayville	United States	Record high minimum temperature	16.7 C (62.1 F)	25 of 100 (Routine)
Dialville 2 W	United States	Record low maximum temperature	21.7 C (71.1 F)	25 of 100 (Routine)
Longview	United States	Record low maximum temperature	23.3 C (73.9 F)	25 of 100 (Routine)
Mana 1026	United States	Record high minimum temperature	22.8 C (73.0 F)	25 of 100 (Routine)
Waimanalo 794	United States	Record daily precipitation	28.2 mm (1.1 in)	25 of 100 (Routine)
Island Falls	Canada	Record daily snowfall	5.8 cm (2.3 in)	24 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record high maximum temperature	23.4 C (74.1 F)	24 of 100 (Routine)
Amalapuram	India	Record daily precipitation	61.5 mm (2.4 in)	24 of 100 (Routine)
Haringhata	India	Record daily precipitation	38.1 mm (1.5 in)	24 of 100 (Routine)
Uruapan (Smn)	Mexico	Record daily precipitation	62.5 mm (2.5 in)	23 of 100 (Routine)
Elsinore	United States	Record daily precipitation	32.8 mm (1.3 in)	23 of 100 (Routine)
Squirrel Inn 1	United States	Record daily precipitation	31.2 mm (1.2 in)	23 of 100 (Routine)
Grand Coteau	United States	Record daily precipitation	74.7 mm (2.9 in)	23 of 100 (Routine)
New Iberia AP - Acadiana Rgnl	United States	Record low maximum temperature	25.0 C (77.0 F)	23 of 100 (Routine)
Angus 1 N	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Makapuu Point 724	United States	Record daily precipitation	30.2 mm (1.2 in)	23 of 100 (Routine)

Counts by Type and Timescale

297 records

Records set or tied on 17 September 1963 by type: Highest daily maximum 17, Lowest daily maximum 64, Highest daily minimum 38, Lowest daily minimum 11, Heaviest daily rainfall 166, Heaviest daily snowfall 1.

Records on 17 September 1963 by type
Record type	Records
Highest daily maximum	17
Lowest daily maximum	64
Highest daily minimum	38
Lowest daily minimum	11
Heaviest daily rainfall	166
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 17 September 1963 by timescale: all-time 0, monthly 6, daily 291.

How Much Records Were Beaten By

243 broken records

Margins by which the 243 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 97.2. Ties are not counted.

Top 20 by Significance

17 September 1963

Top 20 records on 17 September 1963 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1963	Olowalu 296.1, US	monthly rain	60.5 mm (2.4 in)	36.4 mm (1.4 in)	38 years	65 of 100 (Major)
17 September 1963	Kaanapali AP 453.1, US	daily rain	48.3 mm (1.9 in)	44.5 mm (1.8 in)	52 years	60 of 100 (Major)
17 September 1963	Corona, US	daily rain	33.0 mm (1.3 in)	33.0 mm (1.3 in)	53 years	59 of 100 (Notable)
17 September 1963	San Sebastian - Igueldo, ES	daily rain	149.8 mm (5.9 in)	97.2 mm (3.8 in)	20 years	50 of 100 (Notable)
17 September 1963	Guthrie 5S, US	daily rain	93.0 mm (3.7 in)	68.4 mm (2.7 in)	24 years	48 of 100 (Notable)
17 September 1963	Waikapu 390, US	daily rain	44.5 mm (1.8 in)	40.9 mm (1.6 in)	5 years	45 of 100 (Notable)
17 September 1963	Lafayette Rgnl AP, US	monthly rain	150.4 mm (5.9 in)	21.1 mm (0.8 in)	53 years	45 of 100 (Notable)
17 September 1963	Maryville 2E, US	daily rain	62.7 mm (2.5 in)	39.3 mm (1.5 in)	40 years	43 of 100 (Notable)
17 September 1963	Moorestown 4 E, US	daily rain	49.0 mm (1.9 in)	19.0 mm (0.7 in)	79 years	42 of 100 (Notable)
17 September 1963	Willow City, US	daily rain	27.2 mm (1.1 in)	21.9 mm (0.9 in)	40 years	42 of 100 (Notable)
17 September 1963	Kahuku 912, US	daily rain	29.2 mm (1.1 in)	21.3 mm (0.8 in)	18 years	42 of 100 (Notable)
17 September 1963	Riverside Fire STN 3, US	daily rain	32.3 mm (1.3 in)	19.1 mm (0.8 in)	33 years	41 of 100 (Notable)
17 September 1963	Ewa Plantation 741, US	monthly low max	25.0 C (77.0 F)	1.1 C (2.0 F)	51 years	41 of 100 (Notable)
17 September 1963	Newport Beach Harbor, US	daily rain	27.7 mm (1.1 in)	26.2 mm (1.0 in)	40 years	39 of 100 (Notable)
17 September 1963	San Bernardino F S 226, US	daily rain	26.7 mm (1.1 in)	24.4 mm (1.0 in)	16 years	39 of 100 (Notable)
17 September 1963	Koloa 936, US	daily rain	35.6 mm (1.4 in)	17.8 mm (0.7 in)	52 years	38 of 100 (Notable)
17 September 1963	Laguna Beach, US	daily rain	29.7 mm (1.2 in)	28.4 mm (1.1 in)	18 years	36 of 100 (Notable)
17 September 1963	Lahaina 361, US	monthly rain	59.7 mm (2.4 in)	14.5 mm (0.6 in)	22 years	36 of 100 (Notable)
17 September 1963	Searchlight, US	daily rain	26.4 mm (1.0 in)	26.4 mm (1.0 in)	48 years	35 of 100 (Notable)
17 September 1963	Big Pines Park Fc83B, US	daily rain	41.7 mm (1.6 in)	39.7 mm (1.6 in)	24 years	34 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

1796 to 1963

Records set or tied on this calendar date in each year from 1796 to 1963. 1963 had 297 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1963-09-17: 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	206
20 to 40	30
40 to 60	5
60 to 80	1
80 to 100	1