Weather Records on 21 September 2024

470 weather records were set or tied worldwide on 21 September 2024. Highest significance: Rothamsted, GB.

Key Facts for 21 September 2024

On 21 September 2024, 470 weather records were set or tied at long-record stations worldwide.
360 were record highs and 35 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 454 daily.
Rothamsted set a daily record precipitation of 28.0 mm (1.1 in) on 21 September 2024.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 451 records.

Record Map

470 stations

470 station records on 21 September 2024 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 2024: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rothamsted	United Kingdom	Record daily precipitation	28.0 mm (1.1 in)	70 of 100 (Major)
Kidman Springs	Australia	Record daily precipitation	72.0 mm (2.8 in)	57 of 100 (Notable)
Qamdo	China	Record daily precipitation	31.5 mm (1.2 in)	56 of 100 (Notable)
Keele	United Kingdom	Record daily precipitation	39.0 mm (1.5 in)	56 of 100 (Notable)
Humpty Doo Collard Road	Australia	Record daily precipitation	68.0 mm (2.7 in)	52 of 100 (Notable)
Big Sandy	United States	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Bechar	Algeria	Record daily precipitation	25.9 mm (1.0 in)	48 of 100 (Notable)
Middletown Harrisburg Intl AP	United States	Record daily precipitation	55.9 mm (2.2 in)	44 of 100 (Notable)
Aibonito 1 S	Puerto Rico [United States]	Record high minimum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Lebanon 2W	United States	Record high maximum temperature	36.1 C (97.0 F)	42 of 100 (Notable)
Doongan	Australia	Record daily precipitation	42.0 mm (1.7 in)	41 of 100 (Notable)
Ashland	United States	Record high maximum temperature	38.9 C (102.0 F)	40 of 100 (Notable)
Enid	United States	Record high maximum temperature	38.3 C (100.9 F)	40 of 100 (Notable)
Craig	United States	Record high minimum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Gage AP	United States	Record daily precipitation	50.3 mm (2.0 in)	40 of 100 (Notable)
Izuhara	Japan	Record daily precipitation	154.9 mm (6.1 in)	39 of 100 (Notable)
Sitiawan	Malaysia	Record high minimum temperature	26.0 C (78.8 F)	39 of 100 (Notable)
Lidkoping	Sweden	Record high maximum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Moosehead	United States	Record high maximum temperature	28.9 C (84.0 F)	39 of 100 (Notable)
Spavinaw	United States	Record high minimum temperature	25.6 C (78.1 F)	39 of 100 (Notable)
Follett	United States	Record high maximum temperature	38.3 C (100.9 F)	39 of 100 (Notable)
Maraza	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	38 of 100 (Notable)
Vryheid	South Africa	Record daily precipitation	29.0 mm (1.1 in)	38 of 100 (Notable)
Sturgeon Bay Exp Farm	United States	Record high minimum temperature	17.8 C (64.0 F)	38 of 100 (Notable)
Calamocha	Spain	Record daily precipitation	55.6 mm (2.2 in)	36 of 100 (Notable)
Boys Rch	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Brassua Dam	United States	Record high maximum temperature	28.3 C (82.9 F)	35 of 100 (Notable)
Norman 3SSE	United States	Record high maximum temperature	38.3 C (100.9 F)	35 of 100 (Notable)
Elk	United States	Record high maximum temperature	32.8 C (91.0 F)	34 of 100 (Routine)
Dibrugarh/Mohanbar	India	Record high minimum temperature	28.3 C (82.9 F)	33 of 100 (Routine)
Two Rivers	United States	Record high maximum temperature	28.3 C (82.9 F)	33 of 100 (Routine)
Cochabamba	Bolivia	Record high minimum temperature	15.4 C (59.7 F)	32 of 100 (Routine)
Bingham 2 NE	United States	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Van Horn	United States	Record high minimum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Waldron	United States	Record high maximum temperature	37.8 C (100.0 F)	31 of 100 (Routine)
McAllen Miller Intl AP	United States	Record daily precipitation	47.2 mm (1.9 in)	31 of 100 (Routine)
Bilbao Aeropuerto	Spain	Record daily precipitation	46.5 mm (1.8 in)	30 of 100 (Routine)
Waynoka	United States	Record high maximum temperature	40.0 C (104.0 F)	30 of 100 (Routine)
Wasola 5N	United States	Record high maximum temperature	35.0 C (95.0 F)	29 of 100 (Routine)
Helena 1 SSE	United States	Record high minimum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Tulia	United States	Record high maximum temperature	36.7 C (98.1 F)	29 of 100 (Routine)
Rosholt	United States	Record high maximum temperature	30.6 C (87.1 F)	29 of 100 (Routine)
Cedara	South Africa	Record low maximum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Buxton	United Kingdom	Record daily precipitation	27.7 mm (1.1 in)	28 of 100 (Routine)
Lead Hill	United States	Record high minimum temperature	21.7 C (71.1 F)	28 of 100 (Routine)
Germantown Wastewater Utility	United States	Record high maximum temperature	30.6 C (87.1 F)	28 of 100 (Routine)
Puerto Montt	Chile	Record daily precipitation	27.7 mm (1.1 in)	27 of 100 (Routine)
Naze	Japan	Record high minimum temperature	27.4 C (81.3 F)	27 of 100 (Routine)
Mtn View	United States	Record high minimum temperature	23.9 C (75.0 F)	27 of 100 (Routine)
Port Huron	United States	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Helena 1 SSE	United States	Record high maximum temperature	39.4 C (102.9 F)	27 of 100 (Routine)
Tulia	United States	Record high minimum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Gladstone Airport	Australia	Record high maximum temperature	33.4 C (92.1 F)	26 of 100 (Routine)
Guiyang	China	Record high maximum temperature	30.8 C (87.4 F)	26 of 100 (Routine)
Nottingham: Watnall	United Kingdom	Record daily precipitation	51.6 mm (2.0 in)	26 of 100 (Routine)
Underwood	United States	Record high maximum temperature	27.8 C (82.0 F)	26 of 100 (Routine)
Beni-Abbes	Algeria	Record low maximum temperature	24.2 C (75.6 F)	25 of 100 (Routine)
Wanyuan	China	Record high maximum temperature	35.4 C (95.7 F)	25 of 100 (Routine)
Cuddalore	India	Record high maximum temperature	38.0 C (100.4 F)	25 of 100 (Routine)
Mombasa	Kenya	Record high minimum temperature	23.7 C (74.7 F)	25 of 100 (Routine)

Counts by Type and Timescale

470 records

Records set or tied on 21 September 2024 by type: Highest daily maximum 175, Lowest daily maximum 18, Highest daily minimum 185, Lowest daily minimum 17, Heaviest daily rainfall 75.

Records on 21 September 2024 by type
Record type	Records
Highest daily maximum	175
Lowest daily maximum	18
Highest daily minimum	185
Lowest daily minimum	17
Heaviest daily rainfall	75
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 2024 by timescale: all-time 1, monthly 15, daily 454.

How Much Records Were Beaten By

334 broken records

Margins by which the 334 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 48.0. Ties are not counted.

Top 20 by Significance

21 September 2024

Top 20 records on 21 September 2024 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 2024	Rothamsted, GB	daily rain	28.0 mm (1.1 in)	17.6 mm (0.7 in)	106 years	70 of 100 (Major)
21 September 2024	Kidman Springs, AU	monthly rain	72.0 mm (2.8 in)	48.0 mm (1.9 in)	8 years	57 of 100 (Notable)
21 September 2024	Qamdo, CN	daily rain	31.5 mm (1.2 in)	18.5 mm (0.7 in)	57 years	56 of 100 (Notable)
21 September 2024	Keele, GB	daily rain	39.0 mm (1.5 in)	22.2 mm (0.9 in)	41 years	56 of 100 (Notable)
21 September 2024	Humpty Doo Collard Road, AU	monthly rain	68.0 mm (2.7 in)	25.0 mm (1.0 in)	32 years	52 of 100 (Notable)
21 September 2024	Big Sandy, US	monthly rain	43.2 mm (1.7 in)	1.3 mm (0.05 in)	94 years	49 of 100 (Notable)
21 September 2024	Bechar, DZ	daily rain	25.9 mm (1.0 in)	22.9 mm (0.9 in)	16 years	48 of 100 (Notable)
21 September 2024	Middletown Harrisburg Intl AP, US	daily rain	55.9 mm (2.2 in)	34.1 mm (1.3 in)	66 years	44 of 100 (Notable)
21 September 2024	Aibonito 1 S, PR	daily high min	21.7 C (71.1 F)	0.6 C (1.1 F)	115 years	42 of 100 (Notable)
21 September 2024	Lebanon 2W, US	daily high max	36.1 C (97.0 F)	1.1 C (2.0 F)	130 years	42 of 100 (Notable)
21 September 2024	Doongan, AU	monthly rain	42.0 mm (1.7 in)	16.5 mm (0.6 in)	13 years	41 of 100 (Notable)
21 September 2024	Ashland, US	daily high max	38.9 C (102.0 F)	0.6 C (1.1 F)	98 years	40 of 100 (Notable)
21 September 2024	Enid, US	daily high max	38.3 C (100.9 F)	0.5 C (0.9 F)	114 years	40 of 100 (Notable)
21 September 2024	Craig, US	daily high min	14.4 C (57.9 F)	2.2 C (4.0 F)	77 years	40 of 100 (Notable)
21 September 2024	Gage AP, US	daily rain	50.3 mm (2.0 in)	23.1 mm (0.9 in)	34 years	40 of 100 (Notable)
21 September 2024	Izuhara, JP	daily rain	154.9 mm (6.1 in)	42.0 mm (1.7 in)	68 years	39 of 100 (Notable)
21 September 2024	Sitiawan, MY	monthly high min	26.0 C (78.8 F)	0.7 C (1.3 F)	51 years	39 of 100 (Notable)
21 September 2024	Lidkoping, SE	daily high max	21.7 C (71.1 F)	3.8 C (6.8 F)	66 years	39 of 100 (Notable)
21 September 2024	Moosehead, US	daily high max	28.9 C (84.0 F)	3.3 C (5.9 F)	78 years	39 of 100 (Notable)
21 September 2024	Spavinaw, US	daily high min	25.6 C (78.1 F)	1.2 C (2.2 F)	93 years	39 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 2024

Records set or tied on this calendar date in each year from 1805 to 2024. 2024 had 470 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	591
2026	478

Download the Data

Data for records on 2024-09-21: 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 2026-10-15 (15 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 10	307
10 to 20	13
20 to 30	8
30 to 40	3
40 to 50	3