Weather Records on 21 September 1955

752 weather records were set or tied worldwide on 21 September 1955. Highest significance: Nangeenan, AU.

Key Facts for 21 September 1955

On 21 September 1955, 752 weather records were set or tied at long-record stations worldwide.
197 were record highs and 163 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 30 monthly and 722 daily.
Nangeenan set a monthly record daily precipitation of 48.3 mm (1.9 in) on 21 September 1955.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 449 records.

Record Map

752 stations

752 station records on 21 September 1955 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1955: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nangeenan	Australia	Record daily precipitation	48.3 mm (1.9 in)	65 of 100 (Major)
Merredin	Australia	Record daily precipitation	44.7 mm (1.8 in)	63 of 100 (Major)
Merredin Research Station	Australia	Record daily precipitation	41.1 mm (1.6 in)	62 of 100 (Major)
Limoeiro de Anadia	Brazil	Record daily precipitation	43.5 mm (1.7 in)	55 of 100 (Notable)
Pallinup	Australia	Record daily precipitation	26.2 mm (1.0 in)	54 of 100 (Notable)
Tacaratu	Brazil	Record daily precipitation	54.0 mm (2.1 in)	53 of 100 (Notable)
Palmeiro Dos Indios	Brazil	Record daily precipitation	39.1 mm (1.5 in)	53 of 100 (Notable)
Ashland #2	United States	Record daily precipitation	69.9 mm (2.8 in)	53 of 100 (Notable)
Myrup	Australia	Record daily precipitation	29.0 mm (1.1 in)	52 of 100 (Notable)
Tammin	Australia	Record daily precipitation	40.6 mm (1.6 in)	52 of 100 (Notable)
Gnowangerup	Australia	Record daily precipitation	28.4 mm (1.1 in)	52 of 100 (Notable)
Lake Carmody	Australia	Record daily precipitation	33.8 mm (1.3 in)	52 of 100 (Notable)
Chirelillup	Australia	Record daily precipitation	35.1 mm (1.4 in)	51 of 100 (Notable)
Aguas Belas	Brazil	Record daily precipitation	30.3 mm (1.2 in)	51 of 100 (Notable)
Aiea Fld 764A	United States	Record daily precipitation	52.3 mm (2.1 in)	51 of 100 (Notable)
Weeping Water	United States	Record daily precipitation	67.3 mm (2.6 in)	50 of 100 (Notable)
Fraser Range	Australia	Record daily precipitation	37.1 mm (1.5 in)	48 of 100 (Notable)
Cunderdin	Australia	Record daily precipitation	28.7 mm (1.1 in)	47 of 100 (Notable)
Nyabing	Australia	Record daily precipitation	47.0 mm (1.9 in)	47 of 100 (Notable)
Agua Branca	Brazil	Record daily precipitation	33.9 mm (1.3 in)	47 of 100 (Notable)
Doongin Peak	Australia	Record daily precipitation	36.8 mm (1.4 in)	46 of 100 (Notable)
Vicosa	Brazil	Record daily precipitation	44.5 mm (1.8 in)	46 of 100 (Notable)
Washburn	United States	Record daily precipitation	39.1 mm (1.5 in)	46 of 100 (Notable)
Anadia	Brazil	Record daily precipitation	33.7 mm (1.3 in)	45 of 100 (Notable)
Itaporanga Dajuda	Brazil	Record daily precipitation	57.8 mm (2.3 in)	44 of 100 (Notable)
Richardton Abbey	United States	Record daily precipitation	42.9 mm (1.7 in)	44 of 100 (Notable)
Lagarto	Brazil	Record daily precipitation	47.4 mm (1.9 in)	43 of 100 (Notable)
Nossa Senhora Das Dores	Brazil	Record daily precipitation	49.3 mm (1.9 in)	43 of 100 (Notable)
Carlyle	Canada	Record daily precipitation	33.3 mm (1.3 in)	43 of 100 (Notable)
Turtle Lake	United States	Record daily precipitation	32.0 mm (1.3 in)	43 of 100 (Notable)
Tangi	India	Record daily precipitation	177.8 mm (7.0 in)	42 of 100 (Notable)
Portal	United States	Record daily precipitation	25.1 mm (1.0 in)	42 of 100 (Notable)
Vulcan	Canada	Record daily snowfall	25.4 cm (10.0 in)	41 of 100 (Notable)
Vega 2NW	United States	Record daily precipitation	54.1 mm (2.1 in)	40 of 100 (Notable)
Sorab	India	Record daily precipitation	74.9 mm (2.9 in)	38 of 100 (Notable)
Ft Robinson	United States	Record daily precipitation	27.9 mm (1.1 in)	38 of 100 (Notable)
Newell	United States	Record daily precipitation	50.0 mm (2.0 in)	38 of 100 (Notable)
Syracuse	United States	Record daily precipitation	56.6 mm (2.2 in)	37 of 100 (Notable)
Vulcan	Canada	Record daily precipitation	25.4 mm (1.0 in)	36 of 100 (Notable)
The Pines	Australia	Record daily precipitation	26.7 mm (1.1 in)	35 of 100 (Notable)
Walgett (Euroka)	Australia	Record daily precipitation	50.3 mm (2.0 in)	35 of 100 (Notable)
David City 4E	United States	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)
Glenmaggie (the Laurels)	Australia	Record daily precipitation	39.9 mm (1.6 in)	34 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high minimum temperature	13.3 C (55.9 F)	34 of 100 (Routine)
Glenwood 3SW	United States	Record daily precipitation	53.3 mm (2.1 in)	34 of 100 (Routine)
Waiawa 943	United States	Record daily precipitation	31.0 mm (1.2 in)	34 of 100 (Routine)
Mundaring	Australia	Record daily precipitation	33.0 mm (1.3 in)	33 of 100 (Routine)
Carson	United States	Record daily precipitation	45.2 mm (1.8 in)	33 of 100 (Routine)
Larimore 4SW	United States	Record daily precipitation	38.1 mm (1.5 in)	33 of 100 (Routine)
Adelaide West Terrace	Australia	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
St Andrews	Canada	Record low maximum temperature	11.7 C (53.1 F)	32 of 100 (Routine)
Gokak	India	Record daily precipitation	38.1 mm (1.5 in)	32 of 100 (Routine)
Roseau	United States	Record daily precipitation	35.3 mm (1.4 in)	32 of 100 (Routine)
Big Timber	United States	Record daily precipitation	27.7 mm (1.1 in)	32 of 100 (Routine)
Dickinson Exp STN	United States	Record daily precipitation	36.8 mm (1.4 in)	32 of 100 (Routine)
Cincinnati Abbe Wsmo	United States	Record daily precipitation	59.2 mm (2.3 in)	32 of 100 (Routine)
Triunfo	Brazil	Record daily precipitation	25.5 mm (1.0 in)	31 of 100 (Routine)
Aracaju	Brazil	Record daily precipitation	36.8 mm (1.4 in)	31 of 100 (Routine)
Hubbard	Canada	Record daily precipitation	25.4 mm (1.0 in)	31 of 100 (Routine)
Bolgarh	India	Record daily precipitation	85.1 mm (3.4 in)	31 of 100 (Routine)

Counts by Type and Timescale

752 records

Records set or tied on 21 September 1955 by type: Highest daily maximum 142, Lowest daily maximum 85, Highest daily minimum 55, Lowest daily minimum 78, Heaviest daily rainfall 381, Heaviest daily snowfall 11.

Records on 21 September 1955 by type
Record type	Records
Highest daily maximum	142
Lowest daily maximum	85
Highest daily minimum	55
Lowest daily minimum	78
Heaviest daily rainfall	381
Heaviest daily snowfall	11
Deepest snow cover	0

Records on 21 September 1955 by timescale: all-time 0, monthly 30, daily 722.

How Much Records Were Beaten By

609 broken records

Margins by which the 609 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 104.0. Ties are not counted.

Top 20 by Significance

21 September 1955

Top 20 records on 21 September 1955 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1955	Nangeenan, AU	monthly rain	48.3 mm (1.9 in)	26.2 mm (1.0 in)	35 years	65 of 100 (Major)
21 September 1955	Merredin, AU	monthly rain	44.7 mm (1.8 in)	15.2 mm (0.6 in)	28 years	63 of 100 (Major)
21 September 1955	Merredin Research Station, AU	monthly rain	41.1 mm (1.6 in)	21.8 mm (0.9 in)	28 years	62 of 100 (Major)
21 September 1955	Limoeiro de Anadia, BR	daily rain	43.5 mm (1.7 in)	31.5 mm (1.2 in)	36 years	55 of 100 (Notable)
21 September 1955	Pallinup, AU	daily rain	26.2 mm (1.0 in)	20.6 mm (0.8 in)	26 years	54 of 100 (Notable)
21 September 1955	Tacaratu, BR	monthly rain	54.0 mm (2.1 in)	19.5 mm (0.8 in)	11 years	53 of 100 (Notable)
21 September 1955	Palmeiro Dos Indios, BR	daily rain	39.1 mm (1.5 in)	31.9 mm (1.3 in)	32 years	53 of 100 (Notable)
21 September 1955	Ashland #2, US	daily rain	69.9 mm (2.8 in)	59.5 mm (2.3 in)	24 years	53 of 100 (Notable)
21 September 1955	Myrup, AU	daily rain	29.0 mm (1.1 in)	23.2 mm (0.9 in)	28 years	52 of 100 (Notable)
21 September 1955	Tammin, AU	monthly rain	40.6 mm (1.6 in)	10.6 mm (0.4 in)	35 years	52 of 100 (Notable)
21 September 1955	Gnowangerup, AU	daily rain	28.4 mm (1.1 in)	25.4 mm (1.0 in)	26 years	52 of 100 (Notable)
21 September 1955	Lake Carmody, AU	daily rain	33.8 mm (1.3 in)	21.1 mm (0.8 in)	26 years	52 of 100 (Notable)
21 September 1955	Chirelillup, AU	daily rain	35.1 mm (1.4 in)	31.8 mm (1.3 in)	24 years	51 of 100 (Notable)
21 September 1955	Aguas Belas, BR	daily rain	30.3 mm (1.2 in)	17.8 mm (0.7 in)	32 years	51 of 100 (Notable)
21 September 1955	Aiea Fld 764A, US	daily rain	52.3 mm (2.1 in)	27.4 mm (1.1 in)	32 years	51 of 100 (Notable)
21 September 1955	Weeping Water, US	daily rain	67.3 mm (2.6 in)	55.1 mm (2.2 in)	22 years	50 of 100 (Notable)
21 September 1955	Fraser Range, AU	daily rain	37.1 mm (1.5 in)	27.7 mm (1.1 in)	12 years	48 of 100 (Notable)
21 September 1955	Cunderdin, AU	daily rain	28.7 mm (1.1 in)	24.4 mm (1.0 in)	12 years	47 of 100 (Notable)
21 September 1955	Nyabing, AU	monthly rain	47.0 mm (1.9 in)	15.2 mm (0.6 in)	6 years	47 of 100 (Notable)
21 September 1955	Agua Branca, BR	daily rain	33.9 mm (1.3 in)	25.7 mm (1.0 in)	28 years	47 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

1805 to 1955

Records set or tied on this calendar date in each year from 1805 to 1955. 1955 had 752 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 1955-09-21: 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	553
20 to 40	46
40 to 60	8
60 to 80	1
80 to 100	0
100 to 120	1