Weather Records on 20 September 1929

373 weather records were set or tied worldwide on 20 September 1929. Highest significance: Roto (Coombie), AU.

Key Facts for 20 September 1929

On 20 September 1929, 373 weather records were set or tied at long-record stations worldwide.
27 were record highs and 302 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 4 monthly and 369 daily.
Roto (Coombie) set a daily record precipitation of 32.5 mm (1.3 in) on 20 September 1929.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 443 records.

Record Map

373 stations

373 station records on 20 September 1929 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1929: highest significance records shown on the map
Station	Country	Type	Value	Significance
Roto (Coombie)	Australia	Record daily precipitation	32.5 mm (1.3 in)	48 of 100 (Notable)
Neerim	Australia	Record daily precipitation	46.7 mm (1.8 in)	34 of 100 (Routine)
Haparanda	Sweden	Record daily precipitation	33.3 mm (1.3 in)	34 of 100 (Routine)
Malung	Sweden	Record daily precipitation	39.8 mm (1.6 in)	31 of 100 (Routine)
Stratford	Canada	Record low minimum temperature	-1.1 C (30.0 F)	29 of 100 (Routine)
Portland	United States	Record low minimum temperature	3.3 C (37.9 F)	24 of 100 (Routine)
Ottawa	Canada	Record low minimum temperature	-0.6 C (30.9 F)	23 of 100 (Routine)
Tallahassee	United States	Record low minimum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
McPherson	United States	Record daily precipitation	25.7 mm (1.0 in)	22 of 100 (Routine)
E Tawas	United States	Record low minimum temperature	-2.8 C (27.0 F)	22 of 100 (Routine)
Louisburg	United States	Record low minimum temperature	5.0 C (41.0 F)	22 of 100 (Routine)
Philadelphia City	United States	Record low minimum temperature	8.3 C (46.9 F)	22 of 100 (Routine)
Pembroke Eddy Match	Canada	Record low minimum temperature	-1.7 C (28.9 F)	21 of 100 (Routine)
Visby_Flygplats	Sweden	Record high minimum temperature	13.0 C (55.4 F)	21 of 100 (Routine)
Athens	United States	Record low minimum temperature	8.3 C (46.9 F)	21 of 100 (Routine)
Elko Rgnl AP	United States	Record high minimum temperature	12.8 C (55.0 F)	21 of 100 (Routine)
Soltau	Germany	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Mungindi Post Office	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Winterswijk	Netherlands	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Gallivare_A	Sweden	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
Sable Island East End	Canada	Record daily precipitation	48.0 mm (1.9 in)	20 of 100 (Routine)
Gorlitz	Germany	Record high maximum temperature	23.2 C (73.8 F)	20 of 100 (Routine)
Mexico	United States	Record low maximum temperature	10.0 C (50.0 F)	20 of 100 (Routine)
Santa Fe	United States	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Marion	United States	Record low maximum temperature	18.3 C (64.9 F)	20 of 100 (Routine)
Weissenburg	Germany	Record daily precipitation	15.5 mm (0.6 in)	19 of 100 (Routine)
Helmond	Netherlands	Record daily precipitation	13.3 mm (0.5 in)	19 of 100 (Routine)
Williamstown	United States	Record low minimum temperature	-1.7 C (28.9 F)	19 of 100 (Routine)
Beaver City	United States	Record low maximum temperature	13.3 C (55.9 F)	19 of 100 (Routine)
Weldon	United States	Record low maximum temperature	20.0 C (68.0 F)	19 of 100 (Routine)
Little Mtn	United States	Record low minimum temperature	5.0 C (41.0 F)	19 of 100 (Routine)
Trenton 1 NNE	United States	Record low minimum temperature	7.2 C (45.0 F)	19 of 100 (Routine)
Port Townsend	United States	Record daily precipitation	20.3 mm (0.8 in)	19 of 100 (Routine)
Jacksonville Wb City	United States	Record low maximum temperature	22.2 C (72.0 F)	19 of 100 (Routine)
Owen Sound	Canada	Record low minimum temperature	0.0 C (32.0 F)	18 of 100 (Routine)
Altastenberg	Germany	Record daily precipitation	22.9 mm (0.9 in)	18 of 100 (Routine)
Arnsberg	Germany	Record daily precipitation	20.2 mm (0.8 in)	18 of 100 (Routine)
Tecumseh 1S	United States	Record low maximum temperature	10.0 C (50.0 F)	18 of 100 (Routine)
Nashua 2 NNW	United States	Record low minimum temperature	-1.7 C (28.9 F)	18 of 100 (Routine)
Buffalo	United States	Record low minimum temperature	2.8 C (37.0 F)	18 of 100 (Routine)
Upper Sandusky	United States	Record low minimum temperature	1.1 C (34.0 F)	18 of 100 (Routine)
Woodstock 2 NE	United States	Record low minimum temperature	-0.6 C (30.9 F)	18 of 100 (Routine)
Atlantic City Marina	United States	Record low maximum temperature	15.6 C (60.1 F)	18 of 100 (Routine)
Barkerville	Canada	Record daily precipitation	20.3 mm (0.8 in)	17 of 100 (Routine)
Guelph Oac	Canada	Record low minimum temperature	-1.7 C (28.9 F)	17 of 100 (Routine)
Alton	Canada	Record low minimum temperature	-2.2 C (28.0 F)	17 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	12.8 C (55.0 F)	17 of 100 (Routine)
Angermunde	Germany	Record daily precipitation	8.0 mm (0.31 in)	17 of 100 (Routine)
Bederkesa	Germany	Record daily precipitation	17.3 mm (0.7 in)	17 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record high minimum temperature	8.0 C (46.4 F)	17 of 100 (Routine)
Blakely	United States	Record low minimum temperature	11.7 C (53.1 F)	17 of 100 (Routine)
North Bridgton	United States	Record low minimum temperature	-1.7 C (28.9 F)	17 of 100 (Routine)
Emmitsburg	United States	Record low maximum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Cheboygan	United States	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)
Syracuse	United States	Record low maximum temperature	11.7 C (53.1 F)	17 of 100 (Routine)
W Pt	United States	Record low maximum temperature	10.6 C (51.1 F)	17 of 100 (Routine)
Battle Mtn	United States	Record daily precipitation	7.6 mm (0.30 in)	17 of 100 (Routine)
Lambertville River	United States	Record low maximum temperature	16.1 C (61.0 F)	17 of 100 (Routine)
Ft Stanton	United States	Record daily precipitation	22.4 mm (0.9 in)	17 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)

Counts by Type and Timescale

373 records

Records set or tied on 20 September 1929 by type: Highest daily maximum 1, Lowest daily maximum 144, Highest daily minimum 26, Lowest daily minimum 158, Heaviest daily rainfall 44.

Records on 20 September 1929 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	144
Highest daily minimum	26
Lowest daily minimum	158
Heaviest daily rainfall	44
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 September 1929 by timescale: all-time 0, monthly 4, daily 369.

How Much Records Were Beaten By

296 broken records

Margins by which the 296 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 29.2. Ties are not counted.

Top 20 by Significance

20 September 1929

Top 20 records on 20 September 1929 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1929	Roto (Coombie), AU	daily rain	32.5 mm (1.3 in)	29.2 mm (1.1 in)	20 years	48 of 100 (Notable)
20 September 1929	Neerim, AU	daily rain	46.7 mm (1.8 in)	21.3 mm (0.8 in)	28 years	34 of 100 (Routine)
20 September 1929	Haparanda, SE	daily rain	33.3 mm (1.3 in)	14.7 mm (0.6 in)	10 years	34 of 100 (Routine)
20 September 1929	Malung, SE	monthly rain	39.8 mm (1.6 in)	2.2 mm (0.09 in)	46 years	31 of 100 (Routine)
20 September 1929	Stratford, CA	daily low min	-1.1 C (30.0 F)	3.3 C (5.9 F)	57 years	29 of 100 (Routine)
20 September 1929	Portland, US	daily low min	3.3 C (37.9 F)	1.1 C (2.0 F)	53 years	24 of 100 (Routine)
20 September 1929	Ottawa, CA	daily low min	-0.6 C (30.9 F)	2.3 C (4.1 F)	43 years	23 of 100 (Routine)
20 September 1929	Tallahassee, US	daily low min	12.8 C (55.0 F)	2.8 C (5.0 F)	28 years	22 of 100 (Routine)
20 September 1929	McPherson, US	daily rain	25.7 mm (1.0 in)	17.6 mm (0.7 in)	24 years	22 of 100 (Routine)
20 September 1929	E Tawas, US	daily low min	-2.8 C (27.0 F)	5.0 C (9.0 F)	31 years	22 of 100 (Routine)
20 September 1929	Louisburg, US	daily low min	5.0 C (41.0 F)	5.0 C (9.0 F)	28 years	22 of 100 (Routine)
20 September 1929	Philadelphia City, US	daily low min	8.3 C (46.9 F)	0.6 C (1.1 F)	53 years	22 of 100 (Routine)
20 September 1929	Pembroke Eddy Match, CA	daily low min	-1.7 C (28.9 F)	1.1 C (2.0 F)	44 years	21 of 100 (Routine)
20 September 1929	Visby_Flygplats, SE	daily high min	13.0 C (55.4 F)	2.0 C (3.6 F)	35 years	21 of 100 (Routine)
20 September 1929	Athens, US	daily low min	8.3 C (46.9 F)	1.1 C (2.0 F)	39 years	21 of 100 (Routine)
20 September 1929	Elko Rgnl AP, US	daily high min	12.8 C (55.0 F)	7.2 C (13.0 F)	2 years	21 of 100 (Routine)
20 September 1929	Soltau, DE	daily rain	17.0 mm (0.7 in)	7.7 mm (0.30 in)	36 years	20 of 100 (Routine)
20 September 1929	Mungindi Post Office, AU	daily rain	18.3 mm (0.7 in)	13.7 mm (0.5 in)	29 years	20 of 100 (Routine)
20 September 1929	Winterswijk, NL	daily rain	18.0 mm (0.7 in)	8.1 mm (0.32 in)	20 years	20 of 100 (Routine)
20 September 1929	Gallivare_A, SE	daily rain	22.4 mm (0.9 in)	8.4 mm (0.33 in)	11 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

1812 to 1929

Records set or tied on this calendar date in each year from 1812 to 1929. 1929 had 373 records.

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

Records on 09-20 in each year
Year	Records
1812	1
1837	1
1840	1
1844	1
1848	2
1851	1
1852	1
1854	2
1855	1
1856	2
1859	2
1860	1
1862	1
1870	1
1871	2
1882	2
1883	1
1884	1
1886	2
1887	1
1888	2
1889	8
1891	4
1893	5
1894	1
1895	2
1896	1
1897	16
1898	4
1899	1
1900	2
1901	3
1902	3
1903	3
1904	12
1905	8
1906	22
1907	11
1908	24
1909	10
1910	8
1911	21
1912	34
1913	48
1914	28
1915	239
1916	28
1917	100
1918	59
1919	55
1920	64
1921	40
1922	52
1923	249
1924	329
1925	330
1926	129
1927	169
1928	144
1929	373
1930	102
1931	564
1932	270
1933	223
1934	349
1935	201
1936	133
1937	385
1938	506
1939	312
1940	591
1941	582
1942	436
1943	419
1944	466
1945	406
1946	766
1947	460
1948	454
1949	268
1950	435
1951	267
1952	434
1953	479
1954	628
1955	625
1956	985
1957	514
1958	410
1959	489
1960	352
1961	384
1962	707
1963	290
1964	482
1965	1,180
1966	414
1967	449
1968	617
1969	604
1970	591
1971	884
1972	582
1973	569
1974	771
1975	527
1976	375
1977	776
1978	1,216
1979	767
1980	567
1981	979
1982	911
1983	1,958
1984	895
1985	730
1986	743
1987	856
1988	698
1989	968
1990	743
1991	1,835
1992	718
1993	1,031
1994	788
1995	1,374
1996	1,077
1997	1,282
1998	1,157
1999	923
2000	908
2001	821
2002	845
2003	910
2004	1,156
2005	960
2006	732
2007	645
2008	648
2009	715
2010	1,497
2011	650
2012	549
2013	595
2014	577
2015	439
2016	778
2017	920
2018	1,020
2019	835
2020	630
2021	565
2022	786
2023	482
2024	596
2025	877
2026	682

Download the Data

Data for records on 1929-09-20: 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	269
5 to 10	19
10 to 15	5
15 to 20	1
20 to 25	1
25 to 30	1