Weather Records on 21 September 1929

232 weather records were set or tied worldwide on 21 September 1929. Highest significance: Raton, US.

Key Facts for 21 September 1929

On 21 September 1929, 232 weather records were set or tied at long-record stations worldwide.
27 were record highs and 172 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 228 daily.
Raton set a daily record precipitation of 72.4 mm (2.9 in) on 21 September 1929.
Across 155 earlier years (1805 to 2026) the same calendar date averaged 452 records.

Record Map

232 stations

232 station records on 21 September 1929 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 September 1929: highest significance records shown on the map
Station	Country	Type	Value	Significance
Raton	United States	Record daily precipitation	72.4 mm (2.9 in)	45 of 100 (Notable)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	28.0 mm (1.1 in)	40 of 100 (Notable)
Santa Fe	United States	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Parks Spring Rch	United States	Record daily precipitation	33.0 mm (1.3 in)	32 of 100 (Routine)
Edenton	United States	Record low maximum temperature	18.3 C (64.9 F)	25 of 100 (Routine)
Pembroke Eddy Match	Canada	Record low minimum temperature	-3.3 C (26.1 F)	24 of 100 (Routine)
Welland	Canada	Record low maximum temperature	10.0 C (50.0 F)	23 of 100 (Routine)
Williamstown	United States	Record low minimum temperature	-1.7 C (28.9 F)	23 of 100 (Routine)
Northfield	United States	Record low minimum temperature	-5.6 C (21.9 F)	23 of 100 (Routine)
Gallivare_A	Sweden	Record high minimum temperature	8.4 C (47.1 F)	22 of 100 (Routine)
Elsinore	United States	Record low maximum temperature	23.3 C (73.9 F)	22 of 100 (Routine)
Cowles	United States	Record daily precipitation	30.7 mm (1.2 in)	22 of 100 (Routine)
Port Jervis	United States	Record low minimum temperature	-1.7 C (28.9 F)	22 of 100 (Routine)
Susendal	Norway	Record daily precipitation	36.5 mm (1.4 in)	21 of 100 (Routine)
Karesuando	Sweden	Record high minimum temperature	8.5 C (47.3 F)	21 of 100 (Routine)
Middletown 4 W	United States	Record low maximum temperature	15.0 C (59.0 F)	21 of 100 (Routine)
Worcester	United States	Record low minimum temperature	0.0 C (32.0 F)	21 of 100 (Routine)
Nashua 2 NNW	United States	Record low minimum temperature	-1.1 C (30.0 F)	21 of 100 (Routine)
Hemlock	United States	Record low minimum temperature	-1.1 C (30.0 F)	21 of 100 (Routine)
Tarnaby	Sweden	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Kiruna	Sweden	Record daily precipitation	23.7 mm (0.9 in)	20 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Gallivare_A	Sweden	Record daily precipitation	18.6 mm (0.7 in)	20 of 100 (Routine)
Haparanda	Sweden	Record daily precipitation	22.0 mm (0.9 in)	20 of 100 (Routine)
Kenhardt (Pol)	South Africa	Record daily precipitation	3.9 mm (0.15 in)	20 of 100 (Routine)
Austin #2	United States	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Minsk	Belarus	Record daily precipitation	14.8 mm (0.6 in)	20 of 100 (Routine)
Gannapan	South Africa	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Dillon U of Montana Western	United States	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Yarra Junction (Gilderoy)	Australia	Record daily precipitation	28.4 mm (1.1 in)	20 of 100 (Routine)
St Augustine	United States	Record low maximum temperature	23.9 C (75.0 F)	20 of 100 (Routine)
Wappingers Falls	United States	Record low minimum temperature	0.0 C (32.0 F)	20 of 100 (Routine)
Saint John	Canada	Record low minimum temperature	2.8 C (37.0 F)	19 of 100 (Routine)
Jokkmokk	Sweden	Record high minimum temperature	8.5 C (47.3 F)	19 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	1.7 C (35.1 F)	19 of 100 (Routine)
Plymouth	United States	Record low minimum temperature	-3.3 C (26.1 F)	19 of 100 (Routine)
Brome	Canada	Record low minimum temperature	-6.1 C (21.0 F)	18 of 100 (Routine)
Hamburg Fuhlsbuettel	Germany	Record daily precipitation	19.9 mm (0.8 in)	18 of 100 (Routine)
Kissimmee	United States	Record low maximum temperature	24.4 C (75.9 F)	18 of 100 (Routine)
Hanover	United States	Record low minimum temperature	-2.2 C (28.0 F)	18 of 100 (Routine)
Addison	United States	Record low minimum temperature	-2.2 C (28.0 F)	18 of 100 (Routine)
Cooperstown	United States	Record low minimum temperature	-1.1 C (30.0 F)	18 of 100 (Routine)
Gloversville	United States	Record low minimum temperature	-2.2 C (28.0 F)	18 of 100 (Routine)
West Berne	United States	Record low minimum temperature	-3.3 C (26.1 F)	18 of 100 (Routine)
Jim Thorpe	United States	Record low minimum temperature	-1.1 C (30.0 F)	18 of 100 (Routine)
Towanda 1 S	United States	Record low minimum temperature	-0.6 C (30.9 F)	18 of 100 (Routine)
Lyrup	Australia	Record daily precipitation	4.6 mm (0.18 in)	17 of 100 (Routine)
Clontarf	Canada	Record low minimum temperature	-4.4 C (24.1 F)	17 of 100 (Routine)
Junsele	Sweden	Record daily precipitation	18.1 mm (0.7 in)	17 of 100 (Routine)
Redlands	United States	Record low maximum temperature	21.7 C (71.1 F)	17 of 100 (Routine)
Riverside Fire STN 3	United States	Record low maximum temperature	22.8 C (73.0 F)	17 of 100 (Routine)
Colchester 2 W	United States	Record low minimum temperature	0.6 C (33.1 F)	17 of 100 (Routine)
New London	United States	Record low minimum temperature	4.4 C (39.9 F)	17 of 100 (Routine)
Payette	United States	Record low maximum temperature	16.1 C (61.0 F)	17 of 100 (Routine)
Concord	United States	Record low minimum temperature	-0.6 C (30.9 F)	17 of 100 (Routine)
Durham	United States	Record low minimum temperature	0.6 C (33.1 F)	17 of 100 (Routine)
Glens Falls Fire STN	United States	Record low minimum temperature	-0.6 C (30.9 F)	17 of 100 (Routine)
Salisbury	United States	Record low minimum temperature	-2.8 C (27.0 F)	17 of 100 (Routine)
Greensboro	United States	Record low maximum temperature	17.8 C (64.0 F)	17 of 100 (Routine)
Lawrenceville 2 S	United States	Record low minimum temperature	-2.2 C (28.0 F)	17 of 100 (Routine)

Counts by Type and Timescale

232 records

Records set or tied on 21 September 1929 by type: Highest daily maximum 1, Lowest daily maximum 63, Highest daily minimum 26, Lowest daily minimum 109, Heaviest daily rainfall 33.

Records on 21 September 1929 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	63
Highest daily minimum	26
Lowest daily minimum	109
Heaviest daily rainfall	33
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 September 1929 by timescale: all-time 0, monthly 4, daily 228.

How Much Records Were Beaten By

186 broken records

Margins by which the 186 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.1. Ties are not counted.

Top 20 by Significance

21 September 1929

Top 20 records on 21 September 1929 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 September 1929	Raton, US	daily rain	72.4 mm (2.9 in)	68.1 mm (2.7 in)	8 years	45 of 100 (Notable)
21 September 1929	Kvikkjokk-Arrenjarka, SE	daily rain	28.0 mm (1.1 in)	16.5 mm (0.6 in)	10 years	40 of 100 (Notable)
21 September 1929	Santa Fe, US	daily rain	34.3 mm (1.4 in)	3.8 mm (0.15 in)	79 years	36 of 100 (Notable)
21 September 1929	Parks Spring Rch, US	daily rain	33.0 mm (1.3 in)	23.6 mm (0.9 in)	19 years	32 of 100 (Routine)
21 September 1929	Edenton, US	daily low max	18.3 C (64.9 F)	5.0 C (9.0 F)	32 years	25 of 100 (Routine)
21 September 1929	Pembroke Eddy Match, CA	daily low min	-3.3 C (26.1 F)	0.5 C (0.9 F)	57 years	24 of 100 (Routine)
21 September 1929	Welland, CA	daily low max	10.0 C (50.0 F)	1.1 C (2.0 F)	53 years	23 of 100 (Routine)
21 September 1929	Williamstown, US	daily low min	-1.7 C (28.9 F)	3.4 C (6.1 F)	42 years	23 of 100 (Routine)
21 September 1929	Northfield, US	daily low min	-5.6 C (21.9 F)	4.5 C (8.1 F)	36 years	23 of 100 (Routine)
21 September 1929	Gallivare_A, SE	daily high min	8.4 C (47.1 F)	3.4 C (6.1 F)	31 years	22 of 100 (Routine)
21 September 1929	Elsinore, US	daily low max	23.3 C (73.9 F)	5.6 C (10.1 F)	24 years	22 of 100 (Routine)
21 September 1929	Cowles, US	daily rain	30.7 mm (1.2 in)	7.6 mm (0.30 in)	27 years	22 of 100 (Routine)
21 September 1929	Port Jervis, US	daily low min	-1.7 C (28.9 F)	5.0 C (9.0 F)	30 years	22 of 100 (Routine)
21 September 1929	Susendal, NO	monthly rain	36.5 mm (1.4 in)	2.5 mm (0.10 in)	13 years	21 of 100 (Routine)
21 September 1929	Karesuando, SE	daily high min	8.5 C (47.3 F)	2.0 C (3.6 F)	40 years	21 of 100 (Routine)
21 September 1929	Middletown 4 W, US	daily low max	15.0 C (59.0 F)	0.3 C (0.5 F)	53 years	21 of 100 (Routine)
21 September 1929	Worcester, US	daily low min	0.0 C (32.0 F)	4.4 C (7.9 F)	28 years	21 of 100 (Routine)
21 September 1929	Nashua 2 NNW, US	daily low min	-1.1 C (30.0 F)	2.8 C (5.0 F)	42 years	21 of 100 (Routine)
21 September 1929	Hemlock, US	daily low min	-1.1 C (30.0 F)	5.5 C (9.9 F)	24 years	21 of 100 (Routine)
21 September 1929	Tarnaby, SE	daily rain	23.9 mm (0.9 in)	10.9 mm (0.4 in)	35 years	20 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 1929

Records set or tied on this calendar date in each year from 1805 to 1929. 1929 had 232 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 1929-09-21: 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 10	178
10 to 20	6
20 to 30	1
30 to 40	0
40 to 50	0
50 to 60	0
60 to 70	1