Weather Records on 30 September 2009

826 weather records were set or tied worldwide on 30 September 2009. Highest significance: Bozeman Montana State UNIV, US.

Key Facts for 30 September 2009

On 30 September 2009, 826 weather records were set or tied at long-record stations worldwide.
410 were record highs and 230 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 33 monthly and 792 daily.
Bozeman Montana State UNIV set a daily record snowfall of 14.0 cm (5.5 in) on 30 September 2009.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 437 records.

Record Map

826 stations

826 station records on 30 September 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bozeman Montana State UNIV	United States	Record daily snowfall	14.0 cm (5.5 in)	62 of 100 (Major)
Spanish Fk Pwr House	United States	Record daily precipitation	37.1 mm (1.5 in)	57 of 100 (Notable)
Lima	United States	Record daily snowfall	14.0 cm (5.5 in)	56 of 100 (Notable)
Mariupol'	Ukraine	Record daily precipitation	41.9 mm (1.6 in)	52 of 100 (Notable)
Wilsall 8 ENE	United States	Record daily snowfall	25.4 cm (10.0 in)	52 of 100 (Notable)
Zinapecuaro	Mexico	Record daily precipitation	67.8 mm (2.7 in)	51 of 100 (Notable)
Smith & Morehouse	United States	Record daily precipitation	25.4 mm (1.0 in)	51 of 100 (Notable)
Chalk Creek #1	United States	Record daily precipitation	30.5 mm (1.2 in)	49 of 100 (Notable)
Tahiti-Faaa	French Polynesia	Record daily precipitation	53.1 mm (2.1 in)	45 of 100 (Notable)
Gyshgy	Turkmenistan	Record high minimum temperature	16.9 C (62.4 F)	44 of 100 (Notable)
Keams Canyon	United States	Record high minimum temperature	12.8 C (55.0 F)	44 of 100 (Notable)
Bremerton	United States	Record low minimum temperature	1.7 C (35.1 F)	44 of 100 (Notable)
Dillon AP	United States	Record daily precipitation	26.4 mm (1.0 in)	44 of 100 (Notable)
Siwa	Egypt	Record high maximum temperature	41.7 C (107.1 F)	43 of 100 (Notable)
Dulce	United States	Record high minimum temperature	11.7 C (53.1 F)	43 of 100 (Notable)
Newport	United States	Record low maximum temperature	3.9 C (39.0 F)	42 of 100 (Notable)
Newport	United States	Record low minimum temperature	-9.4 C (15.1 F)	42 of 100 (Notable)
Dry Bread Pond	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Fort Huachuca	United States	Record high minimum temperature	18.9 C (66.0 F)	42 of 100 (Notable)
Red Pine Ridge	United States	Record daily precipitation	30.5 mm (1.2 in)	41 of 100 (Notable)
Taylor Park	United States	Record high minimum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Grangeville	United States	Record low maximum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Banner Elk	United States	Record low maximum temperature	8.3 C (46.9 F)	40 of 100 (Notable)
Anacortes	United States	Record high maximum temperature	25.6 C (78.1 F)	40 of 100 (Notable)
Ratnagiri	India	Record daily precipitation	141.0 mm (5.6 in)	39 of 100 (Notable)
Ola	United States	Record low minimum temperature	-8.3 C (17.1 F)	39 of 100 (Notable)
Lewistown 11 SSE	United States	Record daily snowfall	13.5 cm (5.3 in)	39 of 100 (Notable)
Bosque del Apache	United States	Record low minimum temperature	-1.1 C (30.0 F)	39 of 100 (Notable)
Ketchikan AP	United States	Record low maximum temperature	7.8 C (46.0 F)	39 of 100 (Notable)
N'Guigni	Niger	Record high minimum temperature	28.4 C (83.1 F)	38 of 100 (Notable)
Dillon U of Montana Western	United States	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Mansfield 5 W	United States	Record low maximum temperature	6.7 C (44.1 F)	38 of 100 (Notable)
Oak City	United States	Record low maximum temperature	8.9 C (48.0 F)	38 of 100 (Notable)
Bria	Central African Republic	Record low maximum temperature	23.5 C (74.3 F)	37 of 100 (Notable)
Tacambaro	Mexico	Record high maximum temperature	33.9 C (93.0 F)	37 of 100 (Notable)
Borinquen AP	Puerto Rico [United States]	Record high minimum temperature	26.7 C (80.1 F)	37 of 100 (Notable)
Ubon Ratchathani	Thailand	Record daily precipitation	79.0 mm (3.1 in)	36 of 100 (Notable)
Green Rvr	United States	Record low maximum temperature	7.8 C (46.0 F)	36 of 100 (Notable)
Tanquian de Escobedo	Mexico	Record daily precipitation	200.7 mm (7.9 in)	35 of 100 (Notable)
Paradise	United States	Record high maximum temperature	32.2 C (90.0 F)	35 of 100 (Notable)
Cascade 5 S	United States	Record daily precipitation	31.8 mm (1.3 in)	35 of 100 (Notable)
Meekatharra Airport	Australia	Record low maximum temperature	13.7 C (56.7 F)	34 of 100 (Routine)
Litchfield Park	United States	Record high minimum temperature	26.1 C (79.0 F)	34 of 100 (Routine)
Concrete Ppl Fish STN	United States	Record low maximum temperature	10.6 C (51.1 F)	34 of 100 (Routine)
Black Mtn	United States	Record daily snowfall	8.9 cm (3.5 in)	34 of 100 (Routine)
Gadag	India	Record low maximum temperature	22.7 C (72.9 F)	33 of 100 (Routine)
Santa Maria di Leuc	Italy	Record daily precipitation	61.0 mm (2.4 in)	33 of 100 (Routine)
Kanab	United States	Record high minimum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Cedar Lake	United States	Record low maximum temperature	8.3 C (46.9 F)	33 of 100 (Routine)
Quilcene 2 SW	United States	Record low maximum temperature	12.2 C (54.0 F)	33 of 100 (Routine)
Guayama 1SW	Puerto Rico [United States]	Record high minimum temperature	26.7 C (80.1 F)	32 of 100 (Routine)
Hanty-Mansijsk	Russia	Record high minimum temperature	11.3 C (52.3 F)	32 of 100 (Routine)
Lima	United States	Record snow depth	15.2 cm (6.0 in)	32 of 100 (Routine)
Escalante	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Afton	United States	Record daily snowfall	6.4 cm (2.5 in)	32 of 100 (Routine)
Alta 1 NNW	United States	Record snow depth	15.2 cm (6.0 in)	32 of 100 (Routine)
Evanston 1 E	United States	Record daily precipitation	33.0 mm (1.3 in)	32 of 100 (Routine)
Daly Waters AWS	Australia	Record low minimum temperature	11.8 C (53.2 F)	31 of 100 (Routine)
Mt Hebron Rs	United States	Record low minimum temperature	-7.8 C (18.0 F)	31 of 100 (Routine)
Seligman	United States	Record high minimum temperature	15.0 C (59.0 F)	30 of 100 (Routine)

Counts by Type and Timescale

826 records

Records set or tied on 30 September 2009 by type: Highest daily maximum 152, Lowest daily maximum 117, Highest daily minimum 258, Lowest daily minimum 113, Heaviest daily rainfall 162, Heaviest daily snowfall 15, Deepest snow cover 9.

Records on 30 September 2009 by type
Record type	Records
Highest daily maximum	152
Lowest daily maximum	117
Highest daily minimum	258
Lowest daily minimum	113
Heaviest daily rainfall	162
Heaviest daily snowfall	15
Deepest snow cover	9

Records on 30 September 2009 by timescale: all-time 1, monthly 33, daily 792.

How Much Records Were Beaten By

591 broken records

Margins by which the 591 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 216.0. Ties are not counted.

Top 20 by Significance

30 September 2009

Top 20 records on 30 September 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 2009	Bozeman Montana State UNIV, US	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	96 years	62 of 100 (Major)
30 September 2009	Spanish Fk Pwr House, US	daily rain	37.1 mm (1.5 in)	16.5 mm (0.6 in)	83 years	57 of 100 (Notable)
30 September 2009	Lima, US	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	108 years	56 of 100 (Notable)
30 September 2009	Mariupol', UA	daily rain	41.9 mm (1.6 in)	31.5 mm (1.2 in)	48 years	52 of 100 (Notable)
30 September 2009	Wilsall 8 ENE, US	daily snowfall	25.4 cm (10.0 in)	21.6 cm (8.5 in)	50 years	52 of 100 (Notable)
30 September 2009	Zinapecuaro, MX	daily rain	67.8 mm (2.7 in)	40.9 mm (1.6 in)	11 years	51 of 100 (Notable)
30 September 2009	Smith & Morehouse, US	daily rain	25.4 mm (1.0 in)	25.4 mm (1.0 in)	30 years	51 of 100 (Notable)
30 September 2009	Chalk Creek #1, US	daily rain	30.5 mm (1.2 in)	30.5 mm (1.2 in)	30 years	49 of 100 (Notable)
30 September 2009	Tahiti-Faaa, PF	daily rain	53.1 mm (2.1 in)	48.0 mm (1.9 in)	20 years	45 of 100 (Notable)
30 September 2009	Gyshgy, TM	daily high min	16.9 C (62.4 F)	2.3 C (4.1 F)	94 years	44 of 100 (Notable)
30 September 2009	Keams Canyon, US	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	103 years	44 of 100 (Notable)
30 September 2009	Bremerton, US	daily low min	1.7 C (35.1 F)	1.1 C (2.0 F)	108 years	44 of 100 (Notable)
30 September 2009	Dillon AP, US	daily rain	26.4 mm (1.0 in)	9.6 mm (0.38 in)	60 years	44 of 100 (Notable)
30 September 2009	Siwa, EG	daily high max	41.7 C (107.1 F)	1.7 C (3.1 F)	96 years	43 of 100 (Notable)
30 September 2009	Dulce, US	daily high min	11.7 C (53.1 F)	1.7 C (3.1 F)	98 years	43 of 100 (Notable)
30 September 2009	Newport, US	monthly low max	3.9 C (39.0 F)	0.5 C (0.9 F)	75 years	42 of 100 (Notable)
30 September 2009	Newport, US	daily low min	-9.4 C (15.1 F)	2.2 C (4.0 F)	90 years	42 of 100 (Notable)
30 September 2009	Dry Bread Pond, US	daily rain	25.4 mm (1.0 in)	25.4 mm (1.0 in)	30 years	42 of 100 (Notable)
30 September 2009	Fort Huachuca, US	daily high min	18.9 C (66.0 F)	0.6 C (1.1 F)	103 years	42 of 100 (Notable)
30 September 2009	Red Pine Ridge, US	daily rain	30.5 mm (1.2 in)	22.9 mm (0.9 in)	26 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 2009

Records set or tied on this calendar date in each year from 1806 to 2009. 2009 had 826 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 2009-09-30: 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 50	581
50 to 100	7
100 to 150	2
150 to 200	0
200 to 250	1