Weather Records on 21 September 1948

301 weather records were set or tied worldwide on 21 September 1948. Highest significance: Karimnagar, IN.

Key Facts for 21 September 1948

On 21 September 1948, 301 weather records were set or tied at long-record stations worldwide.
103 were record highs and 42 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 298 daily.
Karimnagar set a daily record precipitation of 158.8 mm (6.3 in) on 21 September 1948.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 452 records.

Record Map

301 stations

301 station records on 21 September 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Karimnagar	India	Record daily precipitation	158.8 mm (6.3 in)	55 of 100 (Notable)
Ft Myers Page Fld AP	United States	Record daily precipitation	126.7 mm (5.0 in)	52 of 100 (Notable)
Polavaram	India	Record daily precipitation	97.8 mm (3.9 in)	50 of 100 (Notable)
Homestead Exp STN	United States	Record daily precipitation	101.6 mm (4.0 in)	46 of 100 (Notable)
Nanded	India	Record daily precipitation	130.8 mm (5.1 in)	43 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record high minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Bidar	India	Record daily precipitation	111.8 mm (4.4 in)	41 of 100 (Notable)
Dunoon	Australia	Record daily precipitation	31.8 mm (1.3 in)	36 of 100 (Notable)
Prathipadu	India	Record daily precipitation	101.6 mm (4.0 in)	36 of 100 (Notable)
Poonampet	India	Record daily precipitation	47.8 mm (1.9 in)	35 of 100 (Notable)
Grootvlei (Pol)	South Africa	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Farmersburg	United States	Record daily precipitation	87.6 mm (3.4 in)	34 of 100 (Routine)
Milbank 4 NW	United States	Record daily precipitation	40.4 mm (1.6 in)	31 of 100 (Routine)
Devgad	India	Record daily precipitation	78.7 mm (3.1 in)	30 of 100 (Routine)
Tiruvur(Tiruvvru)	India	Record daily precipitation	80.8 mm (3.2 in)	29 of 100 (Routine)
Banff	Canada	Record high minimum temperature	11.7 C (53.1 F)	28 of 100 (Routine)
Sholapur	India	Record daily precipitation	104.4 mm (4.1 in)	28 of 100 (Routine)
Buxton	United Kingdom	Record low maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Grantsville	United States	Record daily precipitation	40.4 mm (1.6 in)	27 of 100 (Routine)
Creston	United States	Record daily precipitation	35.6 mm (1.4 in)	27 of 100 (Routine)
Gyshgy	Turkmenistan	Record high minimum temperature	19.0 C (66.2 F)	26 of 100 (Routine)
Delphi 2 N	United States	Record daily precipitation	52.1 mm (2.1 in)	26 of 100 (Routine)
Monticello	United States	Record daily precipitation	32.3 mm (1.3 in)	26 of 100 (Routine)
Little Falls 2NNE	United States	Record daily precipitation	30.7 mm (1.2 in)	26 of 100 (Routine)
Piedmont	United States	Record daily precipitation	41.1 mm (1.6 in)	26 of 100 (Routine)
Anticosti SW Point	Canada	Record daily precipitation	33.8 mm (1.3 in)	25 of 100 (Routine)
Salur	India	Record daily precipitation	38.1 mm (1.5 in)	25 of 100 (Routine)
Springfield Mad Rvr St	United States	Record daily precipitation	45.7 mm (1.8 in)	25 of 100 (Routine)
Newrybar	Australia	Record daily precipitation	28.7 mm (1.1 in)	24 of 100 (Routine)
Lowestoft	United Kingdom	Record low maximum temperature	12.8 C (55.0 F)	24 of 100 (Routine)
Greencastle 1 W	United States	Record daily precipitation	27.4 mm (1.1 in)	24 of 100 (Routine)
Jackson 3 NW	United States	Record daily precipitation	35.6 mm (1.4 in)	24 of 100 (Routine)
Kodiak	United States	Record low maximum temperature	5.0 C (41.0 F)	24 of 100 (Routine)
Coffs Harbour	Australia	Record daily precipitation	27.4 mm (1.1 in)	23 of 100 (Routine)
Corning	United States	Record high maximum temperature	35.0 C (95.0 F)	23 of 100 (Routine)
Minneapolis Wb Dwtn	United States	Record daily precipitation	34.8 mm (1.4 in)	23 of 100 (Routine)
Wheaton	United States	Record daily precipitation	33.5 mm (1.3 in)	23 of 100 (Routine)
Alexandria 4 WSW	United States	Record daily precipitation	28.4 mm (1.1 in)	23 of 100 (Routine)
Cloud Chief 2 SE	United States	Record high minimum temperature	23.3 C (73.9 F)	23 of 100 (Routine)
Kothapeta	India	Record daily precipitation	52.3 mm (2.1 in)	22 of 100 (Routine)
Akalkot	India	Record daily precipitation	105.4 mm (4.1 in)	22 of 100 (Routine)
Pottangi	India	Record daily precipitation	58.4 mm (2.3 in)	22 of 100 (Routine)
Hull	United Kingdom	Record low maximum temperature	10.0 C (50.0 F)	22 of 100 (Routine)
Collegeville St Joe AP	United States	Record daily precipitation	36.6 mm (1.4 in)	22 of 100 (Routine)
Albia 3 NNE	United States	Record daily precipitation	57.9 mm (2.3 in)	22 of 100 (Routine)
Emporia 1 S	United States	Record high maximum temperature	35.0 C (95.0 F)	22 of 100 (Routine)
Montevideo 1SW	United States	Record daily precipitation	53.8 mm (2.1 in)	22 of 100 (Routine)
Oakville	United States	Record daily precipitation	29.2 mm (1.1 in)	22 of 100 (Routine)
Cairo 3 S	United States	Record daily precipitation	51.1 mm (2.0 in)	22 of 100 (Routine)
Srungavarapukota	India	Record daily precipitation	38.9 mm (1.5 in)	21 of 100 (Routine)
Cannanore	India	Record daily precipitation	44.5 mm (1.8 in)	21 of 100 (Routine)
Ekimchan	Russia	Record daily precipitation	25.0 mm (1.0 in)	21 of 100 (Routine)
Ukiah	United States	Record low maximum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Burlington	United States	Record high maximum temperature	35.0 C (95.0 F)	21 of 100 (Routine)
Ashland	United States	Record daily precipitation	43.7 mm (1.7 in)	21 of 100 (Routine)
Lismore (Centre Street)	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
S Bend AP	United States	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Emba	Kazakhstan	Record daily precipitation	10.5 mm (0.4 in)	20 of 100 (Routine)
Beerlaagte	South Africa	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Mullumbimby (Fairview Farm)	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

301 records

Records set or tied on 21 September 1948 by type: Highest daily maximum 50, Lowest daily maximum 33, Highest daily minimum 53, Lowest daily minimum 9, Heaviest daily rainfall 156.

Records on 21 September 1948 by type
Record type	Records
Highest daily maximum	50
Lowest daily maximum	33
Highest daily minimum	53
Lowest daily minimum	9
Heaviest daily rainfall	156
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 1948 by timescale: all-time 0, monthly 3, daily 298.

How Much Records Were Beaten By

238 broken records

Margins by which the 238 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.9. Ties are not counted.

Top 20 by Significance

21 September 1948

Top 20 records on 21 September 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1948	Karimnagar, IN	daily rain	158.8 mm (6.3 in)	87.4 mm (3.4 in)	38 years	55 of 100 (Notable)
21 September 1948	Ft Myers Page Fld AP, US	daily rain	126.7 mm (5.0 in)	72.6 mm (2.9 in)	39 years	52 of 100 (Notable)
21 September 1948	Polavaram, IN	daily rain	97.8 mm (3.9 in)	64.0 mm (2.5 in)	27 years	50 of 100 (Notable)
21 September 1948	Homestead Exp STN, US	daily rain	101.6 mm (4.0 in)	79.8 mm (3.1 in)	19 years	46 of 100 (Notable)
21 September 1948	Nanded, IN	daily rain	130.8 mm (5.1 in)	91.9 mm (3.6 in)	3 years	43 of 100 (Notable)
21 September 1948	Cape Otway Lighthouse, AU	daily high min	16.7 C (62.1 F)	2.8 C (5.0 F)	71 years	41 of 100 (Notable)
21 September 1948	Bidar, IN	daily rain	111.8 mm (4.4 in)	59.0 mm (2.3 in)	30 years	41 of 100 (Notable)
21 September 1948	Dunoon, AU	daily rain	31.8 mm (1.3 in)	20.1 mm (0.8 in)	48 years	36 of 100 (Notable)
21 September 1948	Prathipadu, IN	daily rain	101.6 mm (4.0 in)	39.9 mm (1.6 in)	37 years	36 of 100 (Notable)
21 September 1948	Poonampet, IN	daily rain	47.8 mm (1.9 in)	27.5 mm (1.1 in)	29 years	35 of 100 (Notable)
21 September 1948	Grootvlei (Pol), ZA	daily rain	27.4 mm (1.1 in)	19.8 mm (0.8 in)	41 years	35 of 100 (Notable)
21 September 1948	Farmersburg, US	daily rain	87.6 mm (3.4 in)	45.9 mm (1.8 in)	1 year	34 of 100 (Routine)
21 September 1948	Milbank 4 NW, US	daily rain	40.4 mm (1.6 in)	20.6 mm (0.8 in)	24 years	31 of 100 (Routine)
21 September 1948	Devgad, IN	daily rain	78.7 mm (3.1 in)	38.1 mm (1.5 in)	32 years	30 of 100 (Routine)
21 September 1948	Tiruvur(Tiruvvru), IN	daily rain	80.8 mm (3.2 in)	23.6 mm (0.9 in)	46 years	29 of 100 (Routine)
21 September 1948	Banff, CA	daily high min	11.7 C (53.1 F)	3.9 C (7.0 F)	40 years	28 of 100 (Routine)
21 September 1948	Sholapur, IN	daily rain	104.4 mm (4.1 in)	45.7 mm (1.8 in)	1 year	28 of 100 (Routine)
21 September 1948	Buxton, GB	daily low max	8.9 C (48.0 F)	1.3 C (2.3 F)	58 years	28 of 100 (Routine)
21 September 1948	Grantsville, US	daily rain	40.4 mm (1.6 in)	12.5 mm (0.5 in)	35 years	27 of 100 (Routine)
21 September 1948	Creston, US	daily rain	35.6 mm (1.4 in)	15.3 mm (0.6 in)	24 years	27 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

1805 to 1948

Records set or tied on this calendar date in each year from 1805 to 1948. 1948 had 301 records.

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

Records on 09-21 in each year
Year	Records
1805	1
1812	1
1825	2
1840	1
1841	1
1842	1
1848	1
1854	1
1856	2
1868	1
1872	2
1873	1
1877	1
1878	1
1881	1
1882	1
1884	1
1886	1
1888	2
1889	1
1891	10
1892	1
1893	10
1894	2
1895	3
1896	2
1897	6
1898	6
1899	3
1900	2
1901	5
1902	5
1903	8
1904	20
1905	12
1906	17
1907	10
1908	17
1909	10
1910	8
1911	18
1912	26
1913	37
1914	29
1915	34
1916	48
1917	28
1918	43
1919	54
1920	29
1921	64
1922	35
1923	232
1924	291
1925	278
1926	178
1927	165
1928	81
1929	232
1930	82
1931	681
1932	242
1933	193
1934	492
1935	199
1936	329
1937	487
1938	508
1939	308
1940	908
1941	416
1942	291
1943	407
1944	413
1945	507
1946	176
1947	534
1948	301
1949	298
1950	334
1951	241
1952	430
1953	382
1954	453
1955	752
1956	1,100
1957	366
1958	588
1959	513
1960	418
1961	441
1962	1,085
1963	306
1964	374
1965	1,088
1966	565
1967	577
1968	790
1969	593
1970	708
1971	645
1972	599
1973	421
1974	652
1975	528
1976	694
1977	918
1978	818
1979	736
1980	990
1981	696
1982	1,484
1983	2,207
1984	707
1985	796
1986	671
1987	965
1988	557
1989	1,002
1990	716
1991	1,021
1992	752
1993	911
1994	713
1995	2,002
1996	1,233
1997	1,112
1998	1,481
1999	1,025
2000	884
2001	718
2002	696
2003	959
2004	888
2005	1,143
2006	920
2007	742
2008	740
2009	715
2010	1,290
2011	542
2012	595
2013	769
2014	716
2015	565
2016	989
2017	1,178
2018	1,051
2019	833
2020	580
2021	465
2022	1,049
2023	783
2024	470
2025	588
2026	469

Download the Data

Data for records on 1948-09-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 20	219
20 to 40	11
40 to 60	3
60 to 80	3
80 to 100	2