Weather Records on 12 September 1991

672 weather records were set or tied worldwide on 12 September 1991. Highest significance: Genoa, IT.

Key Facts for 12 September 1991

On 12 September 1991, 672 weather records were set or tied at long-record stations worldwide.
318 were record highs and 175 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 18 monthly and 653 daily.
Genoa set a daily record precipitation of 192.2 mm (7.6 in) on 12 September 1991.
Across 164 earlier years (1793 to 2026) the same calendar date averaged 412 records.

Record Map

672 stations

672 station records on 12 September 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 September 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Genoa	Italy	Record daily precipitation	192.2 mm (7.6 in)	62 of 100 (Major)
Novosibirsk	Russia	Record daily precipitation	34.0 mm (1.3 in)	62 of 100 (Major)
Lansing	United States	Record daily precipitation	48.5 mm (1.9 in)	60 of 100 (Major)
Prairie du Chien	United States	Record daily precipitation	85.6 mm (3.4 in)	59 of 100 (Notable)
Kolyvan	Russia	Record daily precipitation	33.6 mm (1.3 in)	58 of 100 (Notable)
Tomsk	Russia	Record daily precipitation	38.4 mm (1.5 in)	56 of 100 (Notable)
Pohnpei WSO	Federated States of Micronesia	Record daily precipitation	201.4 mm (7.9 in)	55 of 100 (Notable)
Bendoc Park	Australia	Record daily precipitation	41.8 mm (1.6 in)	54 of 100 (Notable)
Watertown Wwtp	United States	Record daily precipitation	103.9 mm (4.1 in)	52 of 100 (Notable)
Northwood	United States	Record daily precipitation	68.6 mm (2.7 in)	51 of 100 (Notable)
Villa Obregon	Mexico	Record daily precipitation	149.9 mm (5.9 in)	48 of 100 (Notable)
Kocenevo	Russia	Record daily precipitation	26.1 mm (1.0 in)	48 of 100 (Notable)
Flagstaff (Tnk)	South Africa	Record daily precipitation	39.4 mm (1.6 in)	46 of 100 (Notable)
Bindi	Australia	Record daily precipitation	27.4 mm (1.1 in)	45 of 100 (Notable)
Sym	Russia	Record daily precipitation	26.8 mm (1.1 in)	45 of 100 (Notable)
Durham	United Kingdom	Record low minimum temperature	-0.5 C (31.1 F)	45 of 100 (Notable)
Marseille Obs. Palais-Lonchamp	France	Record daily precipitation	59.6 mm (2.3 in)	43 of 100 (Notable)
Racine Wwtp	United States	Record daily precipitation	100.8 mm (4.0 in)	43 of 100 (Notable)
Decorah	United States	Record daily precipitation	40.9 mm (1.6 in)	42 of 100 (Notable)
Cowra Ag Research Station	Australia	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Naranjal (Cfe)	Mexico	Record daily precipitation	116.1 mm (4.6 in)	41 of 100 (Notable)
Sinton	United States	Record daily precipitation	147.3 mm (5.8 in)	41 of 100 (Notable)
Lynxville Dam 9	United States	Record daily precipitation	72.1 mm (2.8 in)	41 of 100 (Notable)
Lajas Substn	Puerto Rico [United States]	Record high maximum temperature	34.4 C (93.9 F)	40 of 100 (Notable)
Osage	United States	Record daily precipitation	48.3 mm (1.9 in)	40 of 100 (Notable)
Louwsburg (Mag)	South Africa	Record daily precipitation	25.5 mm (1.0 in)	39 of 100 (Notable)
Pocahontas 1	United States	Record high minimum temperature	22.2 C (72.0 F)	39 of 100 (Notable)
Newton	United States	Record high minimum temperature	21.7 C (71.1 F)	39 of 100 (Notable)
Mattoon	United States	Record high maximum temperature	34.4 C (93.9 F)	38 of 100 (Notable)
Cresco 1 NE	United States	Record daily precipitation	56.4 mm (2.2 in)	38 of 100 (Notable)
Keosauqua	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Princeton	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Dodgeville Wwtp	United States	Record daily precipitation	88.9 mm (3.5 in)	38 of 100 (Notable)
Palmerville	Australia	Record low minimum temperature	13.0 C (55.4 F)	37 of 100 (Notable)
Tengchong	China	Record daily precipitation	49.0 mm (1.9 in)	37 of 100 (Notable)
Tlapa (Cfe)	Mexico	Record daily precipitation	48.8 mm (1.9 in)	36 of 100 (Notable)
Pervomajskoe	Russia	Record daily precipitation	30.4 mm (1.2 in)	36 of 100 (Notable)
Paraiso	Mexico	Record low minimum temperature	16.7 C (62.1 F)	35 of 100 (Notable)
Falfurrias	United States	Record daily precipitation	88.1 mm (3.5 in)	35 of 100 (Notable)
Saltville 1N	United States	Record daily precipitation	49.0 mm (1.9 in)	35 of 100 (Notable)
Toguchin	Russia	Record daily precipitation	39.0 mm (1.5 in)	34 of 100 (Routine)
Cengcane (Bos)	South Africa	Record daily precipitation	35.5 mm (1.4 in)	34 of 100 (Routine)
Dorchester	United States	Record daily precipitation	53.3 mm (2.1 in)	34 of 100 (Routine)
Harmony	United States	Record daily precipitation	51.6 mm (2.0 in)	34 of 100 (Routine)
Rockford Gtr Rockford AP	United States	Record daily precipitation	71.6 mm (2.8 in)	34 of 100 (Routine)
Motul	Mexico	Record low maximum temperature	25.6 C (78.1 F)	33 of 100 (Routine)
Moskovo	Russia	Record daily precipitation	34.6 mm (1.4 in)	33 of 100 (Routine)
Geneseo	United States	Record high maximum temperature	34.4 C (93.9 F)	33 of 100 (Routine)
Walterboro 1 SW	United States	Record high minimum temperature	23.9 C (75.0 F)	33 of 100 (Routine)
Kozevnikovo	Russia	Record daily precipitation	39.6 mm (1.6 in)	32 of 100 (Routine)
Lindenberg	Germany	Record low minimum temperature	5.2 C (41.4 F)	31 of 100 (Routine)
Vojsko	Slovenia	Record daily precipitation	83.2 mm (3.3 in)	31 of 100 (Routine)
Ust-Ozernoe	Russia	Record daily precipitation	27.8 mm (1.1 in)	30 of 100 (Routine)
Waukon 3NNE	United States	Record daily precipitation	59.7 mm (2.4 in)	30 of 100 (Routine)
Narbethong	Australia	Record daily precipitation	37.0 mm (1.5 in)	29 of 100 (Routine)
Alpine	United States	Record high minimum temperature	12.2 C (54.0 F)	29 of 100 (Routine)
Espoey	France	Record daily precipitation	27.3 mm (1.1 in)	28 of 100 (Routine)
Nogliki	Russia	Record daily precipitation	31.6 mm (1.2 in)	28 of 100 (Routine)
Simusir	Russia	Record daily precipitation	43.0 mm (1.7 in)	28 of 100 (Routine)
Tsolo	South Africa	Record daily precipitation	29.0 mm (1.1 in)	28 of 100 (Routine)

Counts by Type and Timescale

672 records

Records set or tied on 12 September 1991 by type: Highest daily maximum 148, Lowest daily maximum 64, Highest daily minimum 170, Lowest daily minimum 111, Heaviest daily rainfall 179.

Records on 12 September 1991 by type
Record type	Records
Highest daily maximum	148
Lowest daily maximum	64
Highest daily minimum	170
Lowest daily minimum	111
Heaviest daily rainfall	179
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 September 1991 by timescale: all-time 1, monthly 18, daily 653.

How Much Records Were Beaten By

488 broken records

Margins by which the 488 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 148.2. Ties are not counted.

Top 20 by Significance

12 September 1991

Top 20 records on 12 September 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 September 1991	Genoa, IT	daily rain	192.2 mm (7.6 in)	148.2 mm (5.8 in)	42 years	62 of 100 (Major)
12 September 1991	Novosibirsk, RU	daily rain	34.0 mm (1.3 in)	22.8 mm (0.9 in)	44 years	62 of 100 (Major)
12 September 1991	Lansing, US	daily rain	48.5 mm (1.9 in)	30.2 mm (1.2 in)	90 years	60 of 100 (Major)
12 September 1991	Prairie du Chien, US	daily rain	85.6 mm (3.4 in)	50.0 mm (2.0 in)	44 years	59 of 100 (Notable)
12 September 1991	Kolyvan, RU	daily rain	33.6 mm (1.3 in)	15.9 mm (0.6 in)	48 years	58 of 100 (Notable)
12 September 1991	Tomsk, RU	monthly rain	38.4 mm (1.5 in)	4.7 mm (0.19 in)	83 years	56 of 100 (Notable)
12 September 1991	Pohnpei WSO, FM	daily rain	201.4 mm (7.9 in)	94.5 mm (3.7 in)	36 years	55 of 100 (Notable)
12 September 1991	Bendoc Park, AU	daily rain	41.8 mm (1.6 in)	14.9 mm (0.6 in)	76 years	54 of 100 (Notable)
12 September 1991	Watertown Wwtp, US	daily rain	103.9 mm (4.1 in)	81.5 mm (3.2 in)	12 years	52 of 100 (Notable)
12 September 1991	Northwood, US	daily rain	68.6 mm (2.7 in)	40.4 mm (1.6 in)	58 years	51 of 100 (Notable)
12 September 1991	Villa Obregon, MX	monthly rain	149.9 mm (5.9 in)	35.1 mm (1.4 in)	0 years	48 of 100 (Notable)
12 September 1991	Kocenevo, RU	daily rain	26.1 mm (1.0 in)	16.4 mm (0.6 in)	14 years	48 of 100 (Notable)
12 September 1991	Flagstaff (Tnk), ZA	daily rain	39.4 mm (1.6 in)	21.4 mm (0.8 in)	85 years	46 of 100 (Notable)
12 September 1991	Bindi, AU	daily rain	27.4 mm (1.1 in)	11.1 mm (0.4 in)	70 years	45 of 100 (Notable)
12 September 1991	Sym, RU	daily rain	26.8 mm (1.1 in)	18.8 mm (0.7 in)	8 years	45 of 100 (Notable)
12 September 1991	Durham, GB	daily low min	-0.5 C (31.1 F)	1.6 C (2.9 F)	108 years	45 of 100 (Notable)
12 September 1991	Marseille Obs. Palais-Lonchamp, FR	daily rain	59.6 mm (2.3 in)	15.2 mm (0.6 in)	81 years	43 of 100 (Notable)
12 September 1991	Racine Wwtp, US	daily rain	100.8 mm (4.0 in)	42.4 mm (1.7 in)	12 years	43 of 100 (Notable)
12 September 1991	Decorah, US	daily rain	40.9 mm (1.6 in)	13.5 mm (0.5 in)	81 years	42 of 100 (Notable)
12 September 1991	Cowra Ag Research Station, AU	daily rain	35.0 mm (1.4 in)	10.4 mm (0.4 in)	66 years	41 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

1793 to 1991

Records set or tied on this calendar date in each year from 1793 to 1991. 1991 had 672 records.

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

Records on 09-12 in each year
Year	Records
1793	2
1809	1
1813	1
1814	2
1834	1
1837	2
1839	1
1847	1
1848	1
1854	4
1859	2
1860	2
1865	2
1866	1
1867	1
1868	2
1869	1
1872	2
1876	1
1878	1
1880	1
1881	1
1882	1
1884	2
1885	2
1886	1
1887	2
1888	2
1889	1
1891	4
1892	1
1893	4
1894	1
1895	5
1896	2
1897	3
1898	3
1899	4
1900	1
1901	5
1902	11
1903	18
1904	7
1905	8
1906	24
1907	11
1908	12
1909	11
1910	4
1911	15
1912	20
1913	12
1914	49
1915	71
1916	21
1917	231
1918	42
1919	69
1920	49
1921	60
1922	136
1923	33
1924	177
1925	443
1926	89
1927	339
1928	155
1929	118
1930	198
1931	648
1932	199
1933	360
1934	176
1935	441
1936	515
1937	318
1938	332
1939	702
1940	891
1941	172
1942	337
1943	544
1944	393
1945	414
1946	302
1947	596
1948	292
1949	512
1950	578
1951	399
1952	575
1953	515
1954	313
1955	457
1956	389
1957	727
1958	783
1959	536
1960	772
1961	750
1962	407
1963	466
1964	836
1965	459
1966	416
1967	510
1968	428
1969	558
1970	619
1971	593
1972	430
1973	588
1974	575
1975	1,102
1976	539
1977	524
1978	952
1979	765
1980	511
1981	424
1982	993
1983	915
1984	700
1985	876
1986	787
1987	686
1988	997
1989	1,313
1990	1,001
1991	672
1992	767
1993	798
1994	550
1995	532
1996	1,014
1997	737
1998	1,770
1999	938
2000	1,188
2001	797
2002	883
2003	830
2004	653
2005	1,032
2006	963
2007	776
2008	1,213
2009	876
2010	939
2011	988
2012	639
2013	1,066
2014	1,374
2015	704
2016	748
2017	1,114
2018	595
2019	884
2020	566
2021	513
2022	739
2023	844
2024	1,009
2025	433
2026	627

Download the Data

Data for records on 1991-09-12: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	458
20 to 40	20
40 to 60	4
60 to 80	2
80 to 100	3
100 to 120	0
120 to 140	0
140 to 160	1