Weather Records on 30 September 1991

949 weather records were set or tied worldwide on 30 September 1991. Highest significance: Malung, SE.

Key Facts for 30 September 1991

On 30 September 1991, 949 weather records were set or tied at long-record stations worldwide.
338 were record highs and 248 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 37 monthly and 911 daily.
Malung set a daily record precipitation of 28.1 mm (1.1 in) on 30 September 1991.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 436 records.

Record Map

949 stations

949 station records on 30 September 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Malung	Sweden	Record daily precipitation	28.1 mm (1.1 in)	56 of 100 (Notable)
Quelimane	Mozambique	Record daily precipitation	40.9 mm (1.6 in)	55 of 100 (Notable)
Gustavsfors	Sweden	Record daily precipitation	35.4 mm (1.4 in)	55 of 100 (Notable)
Paso de San Antonio	Mexico	Record daily precipitation	119.9 mm (4.7 in)	52 of 100 (Notable)
Usina Sao Jose	Brazil	Record daily precipitation	90.9 mm (3.6 in)	50 of 100 (Notable)
Engenheiro Maia	Brazil	Record daily precipitation	104.0 mm (4.1 in)	49 of 100 (Notable)
Atibaia	Brazil	Record daily precipitation	51.5 mm (2.0 in)	48 of 100 (Notable)
Itapeva	Brazil	Record daily precipitation	114.5 mm (4.5 in)	48 of 100 (Notable)
Igsi I Hobol	Norway	Record daily precipitation	43.0 mm (1.7 in)	48 of 100 (Notable)
Arcadia	United States	Record high minimum temperature	26.1 C (79.0 F)	48 of 100 (Notable)
Capela Do Alto	Brazil	Record daily precipitation	43.3 mm (1.7 in)	47 of 100 (Notable)
San Lucas Ojitlan	Mexico	Record low minimum temperature	15.6 C (60.1 F)	47 of 100 (Notable)
Mora_A	Sweden	Record daily precipitation	33.6 mm (1.3 in)	47 of 100 (Notable)
Juupajoki Hyytiala	Finland	Record daily precipitation	30.7 mm (1.2 in)	46 of 100 (Notable)
Munkfors	Sweden	Record daily precipitation	30.1 mm (1.2 in)	45 of 100 (Notable)
Red Lake Indian Agcy	United States	Record low minimum temperature	-6.7 C (19.9 F)	44 of 100 (Notable)
Middletown 2 NW	United States	Record low minimum temperature	1.1 C (34.0 F)	44 of 100 (Notable)
Coyame (Cfe)	Mexico	Record daily precipitation	277.4 mm (10.9 in)	43 of 100 (Notable)
Maricopa	United States	Record high maximum temperature	43.3 C (109.9 F)	42 of 100 (Notable)
Kremsmuenster	Austria	Record high minimum temperature	15.0 C (59.0 F)	41 of 100 (Notable)
Mongagua	Brazil	Record daily precipitation	70.2 mm (2.8 in)	41 of 100 (Notable)
Usina Turvinho	Brazil	Record daily precipitation	91.5 mm (3.6 in)	41 of 100 (Notable)
Nord Odal	Norway	Record daily precipitation	32.1 mm (1.3 in)	40 of 100 (Notable)
Pedra Bela	Brazil	Record daily precipitation	51.2 mm (2.0 in)	39 of 100 (Notable)
Gramadinho	Brazil	Record daily precipitation	60.8 mm (2.4 in)	39 of 100 (Notable)
Taquari-Vai	Brazil	Record daily precipitation	94.5 mm (3.7 in)	39 of 100 (Notable)
Siljansfors	Sweden	Record daily precipitation	34.4 mm (1.4 in)	39 of 100 (Notable)
Colonia Do Piagui	Brazil	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Pedro Beicht	Brazil	Record daily precipitation	45.2 mm (1.8 in)	38 of 100 (Notable)
Kisinev	Moldova	Record high minimum temperature	15.5 C (59.9 F)	38 of 100 (Notable)
Corrales	Mexico	Record low maximum temperature	16.1 C (61.0 F)	38 of 100 (Notable)
Torsby	Sweden	Record daily precipitation	28.4 mm (1.1 in)	38 of 100 (Notable)
Skattungbyn	Sweden	Record daily precipitation	30.4 mm (1.2 in)	38 of 100 (Notable)
Bolivar	United States	Record low minimum temperature	-5.0 C (23.0 F)	38 of 100 (Notable)
Mt Morris 2W	United States	Record low minimum temperature	-2.2 C (28.0 F)	38 of 100 (Notable)
Wien	Austria	Record high minimum temperature	19.3 C (66.7 F)	37 of 100 (Notable)
Shumilovka	Russia	Record daily precipitation	25.2 mm (1.0 in)	37 of 100 (Notable)
Solleron	Sweden	Record daily precipitation	32.0 mm (1.3 in)	37 of 100 (Notable)
Laforsen	Sweden	Record daily precipitation	25.1 mm (1.0 in)	37 of 100 (Notable)
Dushanbe	Tajikistan	Record low maximum temperature	13.8 C (56.8 F)	37 of 100 (Notable)
Mendonca	Brazil	Record daily precipitation	52.4 mm (2.1 in)	36 of 100 (Notable)
Caucaia Do Alto	Brazil	Record daily precipitation	39.0 mm (1.5 in)	36 of 100 (Notable)
Huittinen Lauttakyla	Finland	Record daily precipitation	27.1 mm (1.1 in)	36 of 100 (Notable)
Oje_D	Sweden	Record daily precipitation	29.4 mm (1.2 in)	36 of 100 (Notable)
Mae Sot	Thailand	Record daily precipitation	66.0 mm (2.6 in)	36 of 100 (Notable)
Bosque del Apache	United States	Record high maximum temperature	36.1 C (97.0 F)	36 of 100 (Notable)
Instituto Biologico	Brazil	Record daily precipitation	40.9 mm (1.6 in)	35 of 100 (Notable)
Mairinque	Brazil	Record daily precipitation	48.3 mm (1.9 in)	35 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	22.8 C (73.0 F)	35 of 100 (Notable)
Szombathely	Hungary	Record high minimum temperature	15.1 C (59.2 F)	35 of 100 (Notable)
Calarasi	Romania	Record high maximum temperature	34.0 C (93.2 F)	35 of 100 (Notable)
Menza	Russia	Record daily precipitation	28.6 mm (1.1 in)	35 of 100 (Notable)
Lugano	Switzerland	Record daily precipitation	79.2 mm (3.1 in)	35 of 100 (Notable)
Grafton	United States	Record low minimum temperature	-4.4 C (24.1 F)	35 of 100 (Notable)
Alfred	United States	Record low minimum temperature	-6.7 C (19.9 F)	35 of 100 (Notable)
Eleuterio	Brazil	Record daily precipitation	44.4 mm (1.7 in)	34 of 100 (Routine)
Sarutaia (US.Boa Vista-Clfsc)	Brazil	Record daily precipitation	64.3 mm (2.5 in)	34 of 100 (Routine)
Guanhanha	Brazil	Record daily precipitation	32.7 mm (1.3 in)	34 of 100 (Routine)
Narva	Estonia	Record daily precipitation	26.1 mm (1.0 in)	34 of 100 (Routine)
Lisse	Netherlands	Record daily precipitation	29.4 mm (1.2 in)	34 of 100 (Routine)

Counts by Type and Timescale

949 records

Records set or tied on 30 September 1991 by type: Highest daily maximum 176, Lowest daily maximum 99, Highest daily minimum 162, Lowest daily minimum 149, Heaviest daily rainfall 357, Heaviest daily snowfall 4, Deepest snow cover 2.

Records on 30 September 1991 by type
Record type	Records
Highest daily maximum	176
Lowest daily maximum	99
Highest daily minimum	162
Lowest daily minimum	149
Heaviest daily rainfall	357
Heaviest daily snowfall	4
Deepest snow cover	2

Records on 30 September 1991 by timescale: all-time 1, monthly 37, daily 911.

How Much Records Were Beaten By

773 broken records

Margins by which the 773 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 168.9. Ties are not counted.

Top 20 by Significance

30 September 1991

Top 20 records on 30 September 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1991	Malung, SE	daily rain	28.1 mm (1.1 in)	11.9 mm (0.5 in)	93 years	56 of 100 (Notable)
30 September 1991	Quelimane, MZ	daily rain	40.9 mm (1.6 in)	33.5 mm (1.3 in)	36 years	55 of 100 (Notable)
30 September 1991	Gustavsfors, SE	daily rain	35.4 mm (1.4 in)	26.0 mm (1.0 in)	37 years	55 of 100 (Notable)
30 September 1991	Paso de San Antonio, MX	daily rain	119.9 mm (4.7 in)	85.6 mm (3.4 in)	36 years	52 of 100 (Notable)
30 September 1991	Usina Sao Jose, BR	daily rain	90.9 mm (3.6 in)	47.9 mm (1.9 in)	18 years	50 of 100 (Notable)
30 September 1991	Engenheiro Maia, BR	daily rain	104.0 mm (4.1 in)	61.9 mm (2.4 in)	16 years	49 of 100 (Notable)
30 September 1991	Atibaia, BR	daily rain	51.5 mm (2.0 in)	35.5 mm (1.4 in)	44 years	48 of 100 (Notable)
30 September 1991	Itapeva, BR	monthly rain	114.5 mm (4.5 in)	33.3 mm (1.3 in)	28 years	48 of 100 (Notable)
30 September 1991	Igsi I Hobol, NO	daily rain	43.0 mm (1.7 in)	29.0 mm (1.1 in)	24 years	48 of 100 (Notable)
30 September 1991	Arcadia, US	daily high min	26.1 C (79.0 F)	2.2 C (4.0 F)	88 years	48 of 100 (Notable)
30 September 1991	Capela Do Alto, BR	daily rain	43.3 mm (1.7 in)	35.8 mm (1.4 in)	30 years	47 of 100 (Notable)
30 September 1991	San Lucas Ojitlan, MX	daily low min	15.6 C (60.1 F)	4.4 C (7.9 F)	40 years	47 of 100 (Notable)
30 September 1991	Mora_A, SE	daily rain	33.6 mm (1.3 in)	22.7 mm (0.9 in)	25 years	47 of 100 (Notable)
30 September 1991	Juupajoki Hyytiala, FI	daily rain	30.7 mm (1.2 in)	23.1 mm (0.9 in)	10 years	46 of 100 (Notable)
30 September 1991	Munkfors, SE	daily rain	30.1 mm (1.2 in)	19.0 mm (0.7 in)	37 years	45 of 100 (Notable)
30 September 1991	Red Lake Indian Agcy, US	monthly low min	-6.7 C (19.9 F)	1.1 C (2.0 F)	78 years	44 of 100 (Notable)
30 September 1991	Middletown 2 NW, US	daily low min	1.1 C (34.0 F)	2.8 C (5.0 F)	97 years	44 of 100 (Notable)
30 September 1991	Coyame (Cfe), MX	daily rain	277.4 mm (10.9 in)	168.9 mm (6.6 in)	16 years	43 of 100 (Notable)
30 September 1991	Maricopa, US	daily high max	43.3 C (109.9 F)	5.5 C (9.9 F)	73 years	42 of 100 (Notable)
30 September 1991	Kremsmuenster, AT	daily high min	15.0 C (59.0 F)	0.5 C (0.9 F)	104 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

1806 to 1991

Records set or tied on this calendar date in each year from 1806 to 1991. 1991 had 949 records.

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

Records on 09-30 in each year
Year	Records
1806	1
1813	1
1817	1
1819	2
1834	1
1841	1
1842	1
1847	1
1853	1
1854	1
1855	1
1861	1
1862	1
1866	1
1868	2
1869	3
1870	1
1874	1
1877	1
1878	1
1881	5
1883	2
1885	1
1886	3
1887	1
1888	4
1889	1
1892	2
1893	3
1894	8
1895	5
1896	2
1897	3
1898	3
1899	12
1900	4
1901	11
1902	7
1903	9
1904	14
1905	25
1906	14
1907	16
1908	18
1909	10
1910	5
1911	47
1912	47
1913	10
1914	33
1915	84
1916	209
1917	19
1918	45
1919	28
1920	71
1921	61
1922	71
1923	183
1924	243
1925	211
1926	194
1927	486
1928	560
1929	181
1930	110
1931	225
1932	363
1933	437
1934	398
1935	209
1936	432
1937	417
1938	428
1939	371
1940	316
1941	482
1942	405
1943	404
1944	369
1945	889
1946	320
1947	433
1948	267
1949	366
1950	731
1951	597
1952	504
1953	1,136
1954	1,059
1955	406
1956	350
1957	663
1958	442
1959	1,159
1960	161
1961	618
1962	202
1963	818
1964	332
1965	459
1966	592
1967	859
1968	449
1969	465
1970	334
1971	1,359
1972	676
1973	407
1974	742
1975	686
1976	775
1977	870
1978	399
1979	479
1980	832
1981	688
1982	806
1983	1,102
1984	1,267
1985	1,892
1986	1,805
1987	649
1988	453
1989	713
1990	665
1991	949
1992	980
1993	988
1994	816
1995	1,061
1996	1,396
1997	729
1998	1,206
1999	1,144
2000	887
2001	699
2002	677
2003	1,079
2004	573
2005	761
2006	617
2007	841
2008	585
2009	826
2010	1,059
2011	1,258
2012	637
2013	634
2014	529
2015	997
2016	746
2017	404
2018	717
2019	2,192
2020	554
2021	823
2022	563
2023	1,012
2024	948
2025	559
2026	529

Download the Data

Data for records on 1991-09-30: 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 25	743
25 to 50	26
50 to 75	2
75 to 100	1
100 to 125	0
125 to 150	0
150 to 175	1