Weather Records on 30 September 1987

649 weather records were set or tied worldwide on 30 September 1987. Highest significance: Deming, US.

Key Facts for 30 September 1987

On 30 September 1987, 649 weather records were set or tied at long-record stations worldwide.
328 were record highs and 115 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 29 monthly and 620 daily.
Deming set a daily record precipitation of 27.9 mm (1.1 in) on 30 September 1987.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 438 records.

Record Map

649 stations

649 station records on 30 September 1987 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1987: highest significance records shown on the map
Station	Country	Type	Value	Significance
Deming	United States	Record daily precipitation	27.9 mm (1.1 in)	56 of 100 (Notable)
Nevada City	United States	Record high minimum temperature	17.8 C (64.0 F)	54 of 100 (Notable)
Vestervig	Denmark	Record low maximum temperature	7.0 C (44.6 F)	53 of 100 (Notable)
Boorara	Australia	Record daily precipitation	40.0 mm (1.6 in)	52 of 100 (Notable)
Houston	United States	Record low minimum temperature	-5.0 C (23.0 F)	51 of 100 (Notable)
Tranebjerg	Denmark	Record low maximum temperature	7.6 C (45.7 F)	50 of 100 (Notable)
Palermo	Italy	Record daily precipitation	50.6 mm (2.0 in)	49 of 100 (Notable)
Grand Marais 2 E	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
La Villita	Mexico	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Bokfontein, Franklin	South Africa	Record daily precipitation	61.7 mm (2.4 in)	47 of 100 (Notable)
Tlacotepec	Mexico	Record daily precipitation	54.9 mm (2.2 in)	46 of 100 (Notable)
Penjamo	Mexico	Record daily precipitation	43.4 mm (1.7 in)	45 of 100 (Notable)
Tihoreck	Russia	Record daily precipitation	35.1 mm (1.4 in)	45 of 100 (Notable)
Biskra	Algeria	Record high minimum temperature	27.9 C (82.2 F)	44 of 100 (Notable)
Knysna (Tnk)	South Africa	Record daily precipitation	25.0 mm (1.0 in)	44 of 100 (Notable)
Nordby (Fano)	Denmark	Record low maximum temperature	6.7 C (44.1 F)	43 of 100 (Notable)
Presa Malpais	Mexico	Record daily precipitation	45.5 mm (1.8 in)	42 of 100 (Notable)
Inverness 3 SE	United States	Record daily precipitation	43.7 mm (1.7 in)	42 of 100 (Notable)
Huatusco de Chicuellar	Mexico	Record daily precipitation	75.9 mm (3.0 in)	41 of 100 (Notable)
Eagle Pass 3N	United States	Record daily precipitation	56.4 mm (2.2 in)	41 of 100 (Notable)
Atequiza	Mexico	Record daily precipitation	94.7 mm (3.7 in)	40 of 100 (Notable)
Tucson Camp Ave Exp	United States	Record high minimum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Kailiili 436	United States	Record daily precipitation	210.1 mm (8.3 in)	38 of 100 (Notable)
Nueva Esperanza	Mexico	Record high minimum temperature	26.7 C (80.1 F)	37 of 100 (Notable)
Tenosique (Smn)	Mexico	Record high minimum temperature	25.0 C (77.0 F)	36 of 100 (Notable)
Ph Wainiha 1115	United States	Record daily precipitation	63.5 mm (2.5 in)	36 of 100 (Notable)
Sheffield	United Kingdom	Record low minimum temperature	2.7 C (36.9 F)	35 of 100 (Notable)
Forest Grove	United States	Record high maximum temperature	32.2 C (90.0 F)	35 of 100 (Notable)
Clearbrook	United States	Record high maximum temperature	27.2 C (81.0 F)	35 of 100 (Notable)
Olga 2 SE	United States	Record high maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Beaver Falls	United States	Record daily precipitation	139.7 mm (5.5 in)	35 of 100 (Notable)
Slavjansk-Na-Kubani	Russia	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Caballo Dam	United States	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Inverness 3 SE	United States	Record low maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)
Cedar Lake	United States	Record high maximum temperature	28.3 C (82.9 F)	33 of 100 (Routine)
Centralia	United States	Record high maximum temperature	30.6 C (87.1 F)	33 of 100 (Routine)
Cacequi	Brazil	Record daily precipitation	70.0 mm (2.8 in)	32 of 100 (Routine)
Ameca	Mexico	Record daily precipitation	46.5 mm (1.8 in)	32 of 100 (Routine)
Celina	Russia	Record daily precipitation	38.4 mm (1.5 in)	32 of 100 (Routine)
Ocala	United States	Record daily precipitation	54.1 mm (2.1 in)	32 of 100 (Routine)
Erfurt-Bindersleben	Germany	Record low minimum temperature	-0.6 C (30.9 F)	31 of 100 (Routine)
Durango (Dge)	Mexico	Record low maximum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Buffelsnek (Bos)	South Africa	Record daily precipitation	39.6 mm (1.6 in)	31 of 100 (Routine)
Linesville 1 S	United States	Record daily precipitation	28.7 mm (1.1 in)	31 of 100 (Routine)
Vancouver 4 NNE	United States	Record high maximum temperature	31.1 C (88.0 F)	31 of 100 (Routine)
Lake Yellowstone	United States	Record high maximum temperature	22.8 C (73.0 F)	31 of 100 (Routine)
Carnarvon Airport	Australia	Record high maximum temperature	34.9 C (94.8 F)	30 of 100 (Routine)
Turgaj	Kazakhstan	Record high maximum temperature	28.2 C (82.8 F)	30 of 100 (Routine)
Comondu	Mexico	Record high maximum temperature	42.8 C (109.0 F)	30 of 100 (Routine)
Presa Hurtado	Mexico	Record daily precipitation	56.4 mm (2.2 in)	30 of 100 (Routine)
Vanersborg	Sweden	Record low minimum temperature	-0.5 C (31.1 F)	30 of 100 (Routine)
Casa Grande Nm	United States	Record high minimum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Corvallis State UNIV	United States	Record high maximum temperature	31.1 C (88.0 F)	30 of 100 (Routine)
Woodstock	United States	Record high maximum temperature	27.2 C (81.0 F)	30 of 100 (Routine)
Port Townsend	United States	Record high maximum temperature	23.9 C (75.0 F)	30 of 100 (Routine)
Dailey 1 SE	United States	Record daily precipitation	29.2 mm (1.1 in)	30 of 100 (Routine)
Hilo Intl AP 87	United States	Record daily precipitation	59.4 mm (2.3 in)	30 of 100 (Routine)
Zapaluta	Mexico	Record daily precipitation	41.9 mm (1.6 in)	29 of 100 (Routine)
Sacaton	United States	Record high minimum temperature	22.8 C (73.0 F)	29 of 100 (Routine)
Kern River Ph 1	United States	Record high minimum temperature	25.6 C (78.1 F)	29 of 100 (Routine)

Counts by Type and Timescale

649 records

Records set or tied on 30 September 1987 by type: Highest daily maximum 171, Lowest daily maximum 60, Highest daily minimum 157, Lowest daily minimum 55, Heaviest daily rainfall 206.

Records on 30 September 1987 by type
Record type	Records
Highest daily maximum	171
Lowest daily maximum	60
Highest daily minimum	157
Lowest daily minimum	55
Heaviest daily rainfall	206
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 September 1987 by timescale: all-time 0, monthly 29, daily 620.

How Much Records Were Beaten By

509 broken records

Margins by which the 509 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 63.0. Ties are not counted.

Top 20 by Significance

30 September 1987

Top 20 records on 30 September 1987 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1987	Deming, US	daily rain	27.9 mm (1.1 in)	19.0 mm (0.7 in)	91 years	56 of 100 (Notable)
30 September 1987	Nevada City, US	daily high min	17.8 C (64.0 F)	6.1 C (11.0 F)	91 years	54 of 100 (Notable)
30 September 1987	Vestervig, DK	monthly low max	7.0 C (44.6 F)	0.9 C (1.6 F)	110 years	53 of 100 (Notable)
30 September 1987	Boorara, AU	monthly rain	40.0 mm (1.6 in)	5.2 mm (0.20 in)	84 years	52 of 100 (Notable)
30 September 1987	Houston, US	monthly low min	-5.0 C (23.0 F)	3.3 C (5.9 F)	87 years	51 of 100 (Notable)
30 September 1987	Tranebjerg, DK	monthly low max	7.6 C (45.7 F)	0.1 C (0.2 F)	110 years	50 of 100 (Notable)
30 September 1987	Palermo, IT	daily rain	50.6 mm (2.0 in)	28.6 mm (1.1 in)	32 years	49 of 100 (Notable)
30 September 1987	Grand Marais 2 E, US	daily rain	50.8 mm (2.0 in)	33.0 mm (1.3 in)	25 years	49 of 100 (Notable)
30 September 1987	La Villita, MX	daily rain	50.8 mm (2.0 in)	42.4 mm (1.7 in)	18 years	48 of 100 (Notable)
30 September 1987	Bokfontein, Franklin, ZA	daily rain	61.7 mm (2.4 in)	42.4 mm (1.7 in)	9 years	47 of 100 (Notable)
30 September 1987	Tlacotepec, MX	daily rain	54.9 mm (2.2 in)	35.6 mm (1.4 in)	36 years	46 of 100 (Notable)
30 September 1987	Penjamo, MX	daily rain	43.4 mm (1.7 in)	33.5 mm (1.3 in)	34 years	45 of 100 (Notable)
30 September 1987	Tihoreck, RU	daily rain	35.1 mm (1.4 in)	21.1 mm (0.8 in)	6 years	45 of 100 (Notable)
30 September 1987	Biskra, DZ	daily high min	27.9 C (82.2 F)	3.9 C (7.0 F)	73 years	44 of 100 (Notable)
30 September 1987	Knysna (Tnk), ZA	daily rain	25.0 mm (1.0 in)	5.9 mm (0.23 in)	106 years	44 of 100 (Notable)
30 September 1987	Nordby (Fano), DK	monthly low max	6.7 C (44.1 F)	0.9 C (1.6 F)	68 years	43 of 100 (Notable)
30 September 1987	Presa Malpais, MX	daily rain	45.5 mm (1.8 in)	20.4 mm (0.8 in)	42 years	42 of 100 (Notable)
30 September 1987	Inverness 3 SE, US	daily rain	43.7 mm (1.7 in)	18.3 mm (0.7 in)	81 years	42 of 100 (Notable)
30 September 1987	Huatusco de Chicuellar, MX	daily rain	75.9 mm (3.0 in)	24.8 mm (1.0 in)	74 years	41 of 100 (Notable)
30 September 1987	Eagle Pass 3N, US	daily rain	56.4 mm (2.2 in)	25.7 mm (1.0 in)	65 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 1987

Records set or tied on this calendar date in each year from 1806 to 1987. 1987 had 649 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 1987-09-30: 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 10	449
10 to 20	34
20 to 30	15
30 to 40	7
40 to 50	2
50 to 60	1
60 to 70	1