Weather Records on 20 September 1951

267 weather records were set or tied worldwide on 20 September 1951. Highest significance: Caguas, PR.

Key Facts for 20 September 1951

On 20 September 1951, 267 weather records were set or tied at long-record stations worldwide.
133 were record highs and 47 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 264 daily.
Caguas set a daily record precipitation of 76.2 mm (3.0 in) on 20 September 1951.
Across 156 earlier years (1812 to 2026) the same calendar date averaged 443 records.

Record Map

267 stations

267 station records on 20 September 1951 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 September 1951: highest significance records shown on the map
Station	Country	Type	Value	Significance
Caguas	Puerto Rico [United States]	Record daily precipitation	76.2 mm (3.0 in)	49 of 100 (Notable)
Odesa	Ukraine	Record daily precipitation	36.5 mm (1.4 in)	48 of 100 (Notable)
Koolau Dam 833	United States	Record daily precipitation	78.0 mm (3.1 in)	48 of 100 (Notable)
Cramond, Albert Fall	South Africa	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Boyatup	Australia	Record daily precipitation	37.3 mm (1.5 in)	43 of 100 (Notable)
Mount Browne	Australia	Record daily precipitation	33.8 mm (1.3 in)	43 of 100 (Notable)
Izana	Spain	Record daily precipitation	62.7 mm (2.5 in)	43 of 100 (Notable)
Murtajapur	India	Record daily precipitation	57.7 mm (2.3 in)	37 of 100 (Notable)
Kursk	Russia	Record daily precipitation	46.8 mm (1.8 in)	36 of 100 (Notable)
Babb 6 NE	United States	Record daily precipitation	28.7 mm (1.1 in)	35 of 100 (Notable)
Adel	United States	Record daily precipitation	45.7 mm (1.8 in)	33 of 100 (Routine)
Ft Bayard 4W	United States	Record high maximum temperature	36.1 C (97.0 F)	33 of 100 (Routine)
Lares	Puerto Rico [United States]	Record low maximum temperature	26.7 C (80.1 F)	27 of 100 (Routine)
Soldier Summit	United States	Record high maximum temperature	29.4 C (84.9 F)	26 of 100 (Routine)
Yellapur	India	Record daily precipitation	29.7 mm (1.2 in)	25 of 100 (Routine)
Poretskoye	Russia	Record high minimum temperature	14.8 C (58.6 F)	25 of 100 (Routine)
Tomsk	Russia	Record high minimum temperature	11.7 C (53.1 F)	25 of 100 (Routine)
Nagpur (Mayo Hospit	India	Record daily precipitation	48.3 mm (1.9 in)	24 of 100 (Routine)
Walterboro 1 SW	United States	Record low minimum temperature	11.7 C (53.1 F)	24 of 100 (Routine)
Marietta 3 NNW	United States	Record high maximum temperature	27.8 C (82.0 F)	24 of 100 (Routine)
Green Rvr	United States	Record high minimum temperature	13.3 C (55.9 F)	24 of 100 (Routine)
Roswell Muni AP	United States	Record high maximum temperature	36.1 C (97.0 F)	23 of 100 (Routine)
Estes Park	United States	Record high minimum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
Montello 2NE	United States	Record high minimum temperature	13.3 C (55.9 F)	22 of 100 (Routine)
Eutawville	United States	Record low minimum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Blaine	United States	Record high maximum temperature	24.4 C (75.9 F)	22 of 100 (Routine)
Caldwell	Canada	Record daily precipitation	25.9 mm (1.0 in)	21 of 100 (Routine)
Qu'appelle	Canada	Record low maximum temperature	5.6 C (42.1 F)	21 of 100 (Routine)
Devikulam	India	Record daily precipitation	51.1 mm (2.0 in)	21 of 100 (Routine)
Socorro	United States	Record high maximum temperature	36.1 C (97.0 F)	21 of 100 (Routine)
Sedro-Woolley	United States	Record high maximum temperature	28.3 C (82.9 F)	21 of 100 (Routine)
Bower	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Kisinev	Moldova	Record daily precipitation	24.7 mm (1.0 in)	20 of 100 (Routine)
Uman	Ukraine	Record daily precipitation	19.5 mm (0.8 in)	20 of 100 (Routine)
Browning	United States	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Camp Crook	United States	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Nikolaev	Ukraine	Record daily precipitation	21.0 mm (0.8 in)	20 of 100 (Routine)
Burra (Poonunda)	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Lilydale	Australia	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Hallett (Ketchowla)	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Terowie	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Whyalla (Norrie)	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Hallett (Ulooloo Railway Sidin	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Bull Harbour	Canada	Record high maximum temperature	19.4 C (66.9 F)	20 of 100 (Routine)
Stewart	Canada	Record low minimum temperature	-2.8 C (27.0 F)	20 of 100 (Routine)
Kazan	Russia	Record high maximum temperature	24.1 C (75.4 F)	20 of 100 (Routine)
Winkelman 6 S	United States	Record high maximum temperature	37.2 C (99.0 F)	20 of 100 (Routine)
Upper Lake 2 N	United States	Record high minimum temperature	18.3 C (64.9 F)	20 of 100 (Routine)
Mc Intosh 6 SE	United States	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Olga 2 SE	United States	Record low minimum temperature	2.8 C (37.0 F)	20 of 100 (Routine)
Chilliwack	Canada	Record high maximum temperature	27.2 C (81.0 F)	19 of 100 (Routine)
Indian Head Cda	Canada	Record low maximum temperature	6.1 C (43.0 F)	19 of 100 (Routine)
Strehla	South Africa	Record daily precipitation	7.1 mm (0.28 in)	19 of 100 (Routine)
Meadowlands 9 S	United States	Record daily precipitation	17.3 mm (0.7 in)	19 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record daily precipitation	17.8 mm (0.7 in)	19 of 100 (Routine)
Ballantine	United States	Record daily precipitation	15.7 mm (0.6 in)	19 of 100 (Routine)
Bellingham 2 N	United States	Record high maximum temperature	27.2 C (81.0 F)	19 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record high maximum temperature	30.6 C (87.1 F)	19 of 100 (Routine)
Ravensthorpe	Australia	Record daily precipitation	7.4 mm (0.29 in)	18 of 100 (Routine)
Point Lowly Lighthouse	Australia	Record daily precipitation	16.3 mm (0.6 in)	18 of 100 (Routine)

Counts by Type and Timescale

267 records

Records set or tied on 20 September 1951 by type: Highest daily maximum 77, Lowest daily maximum 22, Highest daily minimum 56, Lowest daily minimum 25, Heaviest daily rainfall 85, Heaviest daily snowfall 2.

Records on 20 September 1951 by type
Record type	Records
Highest daily maximum	77
Lowest daily maximum	22
Highest daily minimum	56
Lowest daily minimum	25
Heaviest daily rainfall	85
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 20 September 1951 by timescale: all-time 0, monthly 3, daily 264.

How Much Records Were Beaten By

191 broken records

Margins by which the 191 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 54.6. Ties are not counted.

Top 20 by Significance

20 September 1951

Top 20 records on 20 September 1951 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 September 1951	Caguas, PR	daily rain	76.2 mm (3.0 in)	54.6 mm (2.1 in)	45 years	49 of 100 (Notable)
20 September 1951	Odesa, UA	daily rain	36.5 mm (1.4 in)	21.0 mm (0.8 in)	42 years	48 of 100 (Notable)
20 September 1951	Koolau Dam 833, US	daily rain	78.0 mm (3.1 in)	43.2 mm (1.7 in)	20 years	48 of 100 (Notable)
20 September 1951	Cramond, Albert Fall, ZA	daily rain	50.8 mm (2.0 in)	36.3 mm (1.4 in)	6 years	45 of 100 (Notable)
20 September 1951	Boyatup, AU	daily rain	37.3 mm (1.5 in)	23.3 mm (0.9 in)	24 years	43 of 100 (Notable)
20 September 1951	Mount Browne, AU	daily rain	33.8 mm (1.3 in)	28.2 mm (1.1 in)	4 years	43 of 100 (Notable)
20 September 1951	Izana, ES	monthly rain	62.7 mm (2.5 in)	22.8 mm (0.9 in)	2 years	43 of 100 (Notable)
20 September 1951	Murtajapur, IN	daily rain	57.7 mm (2.3 in)	35.6 mm (1.4 in)	44 years	37 of 100 (Notable)
20 September 1951	Kursk, RU	monthly rain	46.8 mm (1.8 in)	6.7 mm (0.26 in)	28 years	36 of 100 (Notable)
20 September 1951	Babb 6 NE, US	daily rain	28.7 mm (1.1 in)	24.1 mm (0.9 in)	16 years	35 of 100 (Notable)
20 September 1951	Adel, US	daily rain	45.7 mm (1.8 in)	24.1 mm (0.9 in)	9 years	33 of 100 (Routine)
20 September 1951	Ft Bayard 4W, US	daily high max	36.1 C (97.0 F)	5.0 C (9.0 F)	40 years	33 of 100 (Routine)
20 September 1951	Lares, PR	daily low max	26.7 C (80.1 F)	3.3 C (5.9 F)	1 year	27 of 100 (Routine)
20 September 1951	Soldier Summit, US	daily high max	29.4 C (84.9 F)	2.7 C (4.9 F)	53 years	26 of 100 (Routine)
20 September 1951	Yellapur, IN	daily rain	29.7 mm (1.2 in)	6.8 mm (0.27 in)	48 years	25 of 100 (Routine)
20 September 1951	Poretskoye, RU	daily high min	14.8 C (58.6 F)	1.8 C (3.2 F)	51 years	25 of 100 (Routine)
20 September 1951	Tomsk, RU	daily high min	11.7 C (53.1 F)	0.8 C (1.4 F)	58 years	25 of 100 (Routine)
20 September 1951	Nagpur (Mayo Hospit, IN	daily rain	48.3 mm (1.9 in)	12.0 mm (0.5 in)	44 years	24 of 100 (Routine)
20 September 1951	Walterboro 1 SW, US	daily low min	11.7 C (53.1 F)	2.2 C (4.0 F)	48 years	24 of 100 (Routine)
20 September 1951	Marietta 3 NNW, US	daily high max	27.8 C (82.0 F)	3.9 C (7.0 F)	34 years	24 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 1951

Records set or tied on this calendar date in each year from 1812 to 1951. 1951 had 267 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 1951-09-20: 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 10	167
10 to 20	12
20 to 30	7
30 to 40	2
40 to 50	1
50 to 60	2