Weather Records on 30 September 1921

61 weather records were set or tied worldwide on 30 September 1921. Highest significance: San Diego Wbo, US.

Key Facts for 30 September 1921

On 30 September 1921, 61 weather records were set or tied at long-record stations worldwide.
26 were record highs and 11 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 56 daily.
San Diego Wbo set a monthly record daily precipitation of 31.2 mm (1.2 in) on 30 September 1921.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 442 records.

Record Map

61 stations

61 station records on 30 September 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
San Diego Wbo	United States	Record daily precipitation	31.2 mm (1.2 in)	74 of 100 (Major)
Needles	United States	Record daily precipitation	43.2 mm (1.7 in)	27 of 100 (Routine)
Alice Springs Post Office	Australia	Record low maximum temperature	16.7 C (62.1 F)	26 of 100 (Routine)
Quebec	Canada	Record high minimum temperature	15.0 C (59.0 F)	21 of 100 (Routine)
Texas Station	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Wilcannia (Mena Murtee)	Australia	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Apsley	Australia	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Alice Springs Post Office	Australia	Record daily precipitation	2.5 mm (0.10 in)	20 of 100 (Routine)
Wien	Austria	Record low minimum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Gunnee	Australia	Record daily precipitation	14.2 mm (0.6 in)	19 of 100 (Routine)
Prescott 2 NNW	United States	Record daily precipitation	49.5 mm (1.9 in)	19 of 100 (Routine)
Kristianstad	Sweden	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)
Middletown 4 W	United States	Record high maximum temperature	27.2 C (81.0 F)	17 of 100 (Routine)
Moorestown 4 E	United States	Record high maximum temperature	32.8 C (91.0 F)	17 of 100 (Routine)
Orenburg	Russia	Record daily precipitation	11.5 mm (0.5 in)	16 of 100 (Routine)
Hermannsburg	Australia	Record daily precipitation	2.3 mm (0.09 in)	15 of 100 (Routine)
Beechal	Australia	Record daily precipitation	22.4 mm (0.9 in)	15 of 100 (Routine)
Willow Tree (Valais)	Australia	Record daily precipitation	8.1 mm (0.32 in)	15 of 100 (Routine)
Walgett (Euroka)	Australia	Record daily precipitation	9.4 mm (0.37 in)	14 of 100 (Routine)
Burlington	United States	Record high maximum temperature	27.8 C (82.0 F)	14 of 100 (Routine)
Hatfield (Clare)	Australia	Record daily precipitation	5.1 mm (0.20 in)	13 of 100 (Routine)
Wollun	Australia	Record daily precipitation	21.6 mm (0.9 in)	13 of 100 (Routine)
Coolah (Binnia St)	Australia	Record daily precipitation	10.9 mm (0.4 in)	13 of 100 (Routine)
Ottawa Cda	Canada	Record high minimum temperature	15.6 C (60.1 F)	13 of 100 (Routine)
Renfrew	Canada	Record high minimum temperature	18.3 C (64.9 F)	13 of 100 (Routine)
Halmstad	Sweden	Record low minimum temperature	-1.0 C (30.2 F)	13 of 100 (Routine)
Brome	Canada	Record high maximum temperature	26.7 C (80.1 F)	12 of 100 (Routine)
Middletown 4 W	United States	Record high minimum temperature	18.3 C (64.9 F)	12 of 100 (Routine)
Weldon	United States	Record high maximum temperature	33.9 C (93.0 F)	12 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	30.6 C (87.1 F)	12 of 100 (Routine)
Kingston SE	Australia	Record daily precipitation	7.1 mm (0.28 in)	11 of 100 (Routine)
Maragle Station	Australia	Record daily precipitation	12.7 mm (0.5 in)	11 of 100 (Routine)
Bird Rocks	Canada	Record high minimum temperature	12.8 C (55.0 F)	11 of 100 (Routine)
Lake Cochituate	United States	Record high minimum temperature	18.9 C (66.0 F)	11 of 100 (Routine)
Williamstown	United States	Record high minimum temperature	16.1 C (61.0 F)	11 of 100 (Routine)
Setauket Strong	United States	Record high minimum temperature	17.8 C (64.0 F)	11 of 100 (Routine)
Vanersborg	Sweden	Record low minimum temperature	0.0 C (32.0 F)	10 of 100 (Routine)
Vineland	United States	Record high maximum temperature	31.7 C (89.1 F)	10 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	27.2 C (81.0 F)	10 of 100 (Routine)
Pine Bluff	United States	Record daily precipitation	31.0 mm (1.2 in)	9 of 100 (Routine)
Jumping Sand Hill Well	Australia	Record daily precipitation	10.7 mm (0.4 in)	8 of 100 (Routine)
Vestervig	Denmark	Record low minimum temperature	2.1 C (35.8 F)	8 of 100 (Routine)
Freiburg	Germany	Record low minimum temperature	1.9 C (35.4 F)	8 of 100 (Routine)
Barraba (Mount Lindsay)	Australia	Record daily precipitation	11.4 mm (0.4 in)	7 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record high maximum temperature	23.8 C (74.8 F)	7 of 100 (Routine)
Lowell	United States	Record high minimum temperature	18.3 C (64.9 F)	7 of 100 (Routine)
Belton (Shadow Vale)	Australia	Record daily precipitation	4.6 mm (0.18 in)	6 of 100 (Routine)
Carrieton (Yackara)	Australia	Record daily precipitation	7.4 mm (0.29 in)	6 of 100 (Routine)
Pointe Au Pere	Canada	Record high maximum temperature	27.8 C (82.0 F)	5 of 100 (Routine)
Needles	United States	Record low maximum temperature	23.3 C (73.9 F)	5 of 100 (Routine)
Lowell	United States	Record high maximum temperature	27.8 C (82.0 F)	5 of 100 (Routine)
Ottawa	Canada	Record high maximum temperature	26.7 C (80.1 F)	4 of 100 (Routine)
Pointe Au Pere	Canada	Record high minimum temperature	10.0 C (50.0 F)	4 of 100 (Routine)
Quebec	Canada	Record high maximum temperature	25.6 C (78.1 F)	3 of 100 (Routine)
Sfax El-Maou	Tunisia	Record low minimum temperature	10.0 C (50.0 F)	3 of 100 (Routine)
Orleansville (Chlef)	Algeria	Record low minimum temperature	12.0 C (53.6 F)	2 of 100 (Routine)
Sedan (Sandleton)	Australia	Record daily precipitation	5.3 mm (0.21 in)	2 of 100 (Routine)
Paris	Canada	Record low minimum temperature	0.0 C (32.0 F)	2 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	28.9 C (84.0 F)	2 of 100 (Routine)
Sydney	Canada	Record high maximum temperature	23.9 C (75.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

61 records

Records set or tied on 30 September 1921 by type: Highest daily maximum 16, Lowest daily maximum 2, Highest daily minimum 10, Lowest daily minimum 9, Heaviest daily rainfall 24.

Records on 30 September 1921 by type
Record type	Records
Highest daily maximum	16
Lowest daily maximum	2
Highest daily minimum	10
Lowest daily minimum	9
Heaviest daily rainfall	24
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 September 1921 by timescale: all-time 0, monthly 5, daily 56.

How Much Records Were Beaten By

49 broken records

Margins by which the 49 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 21.0. Ties are not counted.

Top 20 by Significance

30 September 1921

Top 20 records on 30 September 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1921	San Diego Wbo, US	monthly rain	31.2 mm (1.2 in)	21.0 mm (0.8 in)	58 years	74 of 100 (Major)
30 September 1921	Needles, US	monthly rain	43.2 mm (1.7 in)	8.4 mm (0.33 in)	13 years	27 of 100 (Routine)
30 September 1921	Alice Springs Post Office, AU	daily low max	16.7 C (62.1 F)	5.0 C (9.0 F)	41 years	26 of 100 (Routine)
30 September 1921	Quebec, CA	daily high min	15.0 C (59.0 F)	2.2 C (4.0 F)	41 years	21 of 100 (Routine)
30 September 1921	Texas Station, AU	daily rain	21.1 mm (0.8 in)	18.6 mm (0.7 in)	14 years	20 of 100 (Routine)
30 September 1921	Wilcannia (Mena Murtee), AU	daily rain	6.4 mm (0.25 in)	6.4 mm (0.25 in)	41 years	20 of 100 (Routine)
30 September 1921	Apsley, AU	daily rain	14.2 mm (0.6 in)	6.3 mm (0.25 in)	30 years	20 of 100 (Routine)
30 September 1921	Alice Springs Post Office, AU	daily rain	2.5 mm (0.10 in)	2.5 mm (0.10 in)	47 years	20 of 100 (Routine)
30 September 1921	Wien, AT	daily low min	2.2 C (36.0 F)	0.5 C (0.9 F)	43 years	20 of 100 (Routine)
30 September 1921	Gunnee, AU	daily rain	14.2 mm (0.6 in)	6.1 mm (0.24 in)	32 years	19 of 100 (Routine)
30 September 1921	Prescott 2 NNW, US	daily rain	49.5 mm (1.9 in)	19.0 mm (0.7 in)	20 years	19 of 100 (Routine)
30 September 1921	Kristianstad, SE	daily low min	0.0 C (32.0 F)	2.0 C (3.6 F)	24 years	17 of 100 (Routine)
30 September 1921	Middletown 4 W, US	daily high max	27.2 C (81.0 F)	0.5 C (0.9 F)	41 years	17 of 100 (Routine)
30 September 1921	Moorestown 4 E, US	daily high max	32.8 C (91.0 F)	3.4 C (6.1 F)	22 years	17 of 100 (Routine)
30 September 1921	Orenburg, RU	daily rain	11.5 mm (0.5 in)	2.6 mm (0.10 in)	22 years	16 of 100 (Routine)
30 September 1921	Hermannsburg, AU	daily rain	2.3 mm (0.09 in)	2.3 mm (0.09 in)	32 years	15 of 100 (Routine)
30 September 1921	Beechal, AU	daily rain	22.4 mm (0.9 in)	3.9 mm (0.15 in)	25 years	15 of 100 (Routine)
30 September 1921	Willow Tree (Valais), AU	daily rain	8.1 mm (0.32 in)	3.3 mm (0.13 in)	28 years	15 of 100 (Routine)
30 September 1921	Walgett (Euroka), AU	daily rain	9.4 mm (0.37 in)	6.6 mm (0.26 in)	15 years	14 of 100 (Routine)
30 September 1921	Burlington, US	daily high max	27.8 C (82.0 F)	2.2 C (4.0 F)	24 years	14 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

1806 to 1921

Records set or tied on this calendar date in each year from 1806 to 1921. 1921 had 61 records.

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

Records on 09-30 in each year
Year	Records
1806	1
1813	1
1817	1
1819	2
1834	1
1841	1
1842	1
1847	1
1853	1
1854	1
1855	1
1861	1
1862	1
1866	1
1868	2
1869	3
1870	1
1874	1
1877	1
1878	1
1881	5
1883	2
1885	1
1886	3
1887	1
1888	4
1889	1
1892	2
1893	3
1894	8
1895	5
1896	2
1897	3
1898	3
1899	12
1900	4
1901	11
1902	7
1903	9
1904	14
1905	25
1906	14
1907	16
1908	18
1909	10
1910	5
1911	47
1912	47
1913	10
1914	33
1915	84
1916	209
1917	19
1918	45
1919	28
1920	71
1921	61
1922	71
1923	183
1924	243
1925	211
1926	194
1927	486
1928	560
1929	181
1930	110
1931	225
1932	363
1933	437
1934	398
1935	209
1936	432
1937	417
1938	428
1939	371
1940	316
1941	482
1942	405
1943	404
1944	369
1945	889
1946	320
1947	433
1948	267
1949	366
1950	731
1951	597
1952	504
1953	1,136
1954	1,059
1955	406
1956	350
1957	663
1958	442
1959	1,159
1960	161
1961	618
1962	202
1963	818
1964	332
1965	459
1966	592
1967	859
1968	449
1969	465
1970	334
1971	1,359
1972	676
1973	407
1974	742
1975	686
1976	775
1977	870
1978	399
1979	479
1980	832
1981	688
1982	806
1983	1,102
1984	1,267
1985	1,892
1986	1,805
1987	649
1988	453
1989	713
1990	665
1991	949
1992	980
1993	988
1994	816
1995	1,061
1996	1,396
1997	729
1998	1,206
1999	1,144
2000	887
2001	699
2002	677
2003	1,079
2004	573
2005	761
2006	617
2007	841
2008	585
2009	826
2010	1,059
2011	1,258
2012	637
2013	634
2014	529
2015	997
2016	746
2017	404
2018	717
2019	2,192
2020	554
2021	823
2022	563
2023	1,012
2024	948
2025	559
2026	523

Download the Data

Data for records on 1921-09-30: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 5	40
5 to 10	6
10 to 15	0
15 to 20	2
20 to 25	1