Weather Records on 30 September 1974

742 weather records were set or tied worldwide on 30 September 1974. Highest significance: Atlin, CA.

Key Facts for 30 September 1974

On 30 September 1974, 742 weather records were set or tied at long-record stations worldwide.
123 were record highs and 425 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 65 monthly and 676 daily.
Atlin set a monthly record daily snowfall of 21.6 cm (8.5 in) on 30 September 1974.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 438 records.

Record Map

742 stations

742 station records on 30 September 1974 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1974: highest significance records shown on the map
Station	Country	Type	Value	Significance
Atlin	Canada	Record daily snowfall	21.6 cm (8.5 in)	72 of 100 (Major)
Oestersund-Froesoen	Sweden	Record daily precipitation	27.8 mm (1.1 in)	59 of 100 (Notable)
Hakea	Australia	Record daily precipitation	25.4 mm (1.0 in)	57 of 100 (Notable)
Nitchequon	Canada	Record daily snowfall	28.2 cm (11.1 in)	56 of 100 (Notable)
Ruhnu	Latvia	Record daily precipitation	33.6 mm (1.3 in)	51 of 100 (Notable)
Tallinn	Estonia	Record daily precipitation	30.0 mm (1.2 in)	49 of 100 (Notable)
Philadelphia Polisie	South Africa	Record daily precipitation	28.0 mm (1.1 in)	48 of 100 (Notable)
Nitchequon	Canada	Record daily precipitation	54.9 mm (2.2 in)	46 of 100 (Notable)
Kihnu	Estonia	Record daily precipitation	33.1 mm (1.3 in)	46 of 100 (Notable)
Grenfell	Canada	Record daily snowfall	5.1 cm (2.0 in)	45 of 100 (Notable)
Ilyinskiy	Russia	Record daily precipitation	52.2 mm (2.1 in)	44 of 100 (Notable)
Morozovsk	Russia	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Langgewens (Wrs)	South Africa	Record daily precipitation	33.0 mm (1.3 in)	43 of 100 (Notable)
Nepabunna Mission	Australia	Record daily precipitation	27.6 mm (1.1 in)	41 of 100 (Notable)
Atlin	Canada	Record low maximum temperature	-2.2 C (28.0 F)	40 of 100 (Notable)
The Towers	South Africa	Record daily precipitation	28.0 mm (1.1 in)	38 of 100 (Notable)
Coimbra	Portugal	Record low minimum temperature	5.6 C (42.1 F)	37 of 100 (Notable)
Tempe Downs	Australia	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Coniston	Canada	Record daily snowfall	5.1 cm (2.0 in)	36 of 100 (Notable)
Kuusiku	Estonia	Record daily precipitation	32.3 mm (1.3 in)	36 of 100 (Notable)
Tuba City	United States	Record low minimum temperature	-5.6 C (21.9 F)	36 of 100 (Notable)
Delta	United States	Record low minimum temperature	-3.3 C (26.1 F)	36 of 100 (Notable)
Ellendale	United States	Record low minimum temperature	-8.9 C (16.0 F)	36 of 100 (Notable)
Parnu	Estonia	Record daily precipitation	31.5 mm (1.2 in)	35 of 100 (Notable)
St. Petersburg	Russia	Record high maximum temperature	18.8 C (65.8 F)	35 of 100 (Notable)
Washburn	United States	Record low minimum temperature	-7.8 C (18.0 F)	35 of 100 (Notable)
Eureka	United States	Record low minimum temperature	-9.4 C (15.1 F)	35 of 100 (Notable)
Carcross	Canada	Record low maximum temperature	-2.8 C (27.0 F)	34 of 100 (Routine)
Beaverlodge Cda	Canada	Record low minimum temperature	-11.7 C (10.9 F)	34 of 100 (Routine)
Cayo Arenas	Mexico	Record daily precipitation	61.5 mm (2.4 in)	34 of 100 (Routine)
Ashley	United States	Record low minimum temperature	-10.6 C (12.9 F)	34 of 100 (Routine)
Huron Rgnl AP	United States	Record low minimum temperature	-7.2 C (19.0 F)	34 of 100 (Routine)
Tapalpa (Smn)	Mexico	Record daily precipitation	34.5 mm (1.4 in)	33 of 100 (Routine)
Kjobli I Snaasa	Norway	Record daily precipitation	26.1 mm (1.0 in)	33 of 100 (Routine)
Poretskoye	Russia	Record high maximum temperature	24.0 C (75.2 F)	33 of 100 (Routine)
Winterset 4N	United States	Record low minimum temperature	-3.3 C (26.1 F)	33 of 100 (Routine)
Iron River	Canada	Record daily snowfall	6.6 cm (2.6 in)	32 of 100 (Routine)
Mistassini Post	Canada	Record low maximum temperature	0.0 C (32.0 F)	32 of 100 (Routine)
Fruitland	United States	Record low minimum temperature	-2.2 C (28.0 F)	32 of 100 (Routine)
Mandan Exp STN	United States	Record low minimum temperature	-10.0 C (14.0 F)	32 of 100 (Routine)
Towner 2 NE	United States	Record low minimum temperature	-11.1 C (12.0 F)	32 of 100 (Routine)
Kennebec	United States	Record low minimum temperature	-6.1 C (21.0 F)	32 of 100 (Routine)
Bayfield 6 N	United States	Record low maximum temperature	7.2 C (45.0 F)	32 of 100 (Routine)
Langara	Canada	Record daily precipitation	36.8 mm (1.4 in)	31 of 100 (Routine)
Meanook	Canada	Record low minimum temperature	-10.0 C (14.0 F)	31 of 100 (Routine)
Syktyvkar	Russia	Record high maximum temperature	20.6 C (69.1 F)	31 of 100 (Routine)
Springview 2NW	United States	Record low minimum temperature	-4.4 C (24.1 F)	31 of 100 (Routine)
Bottineau	United States	Record low maximum temperature	2.2 C (36.0 F)	31 of 100 (Routine)
Faulkton	United States	Record low minimum temperature	-8.9 C (16.0 F)	31 of 100 (Routine)
St. Petersburg	Russia	Record high minimum temperature	14.1 C (57.4 F)	30 of 100 (Routine)
Pogranichnyj	Russia	Record high minimum temperature	11.6 C (52.9 F)	30 of 100 (Routine)
Deland 1 SSE	United States	Record low minimum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Wadena 3 S	United States	Record low minimum temperature	-8.3 C (17.1 F)	30 of 100 (Routine)
Gann Valley 4NW	United States	Record low minimum temperature	-7.8 C (18.0 F)	30 of 100 (Routine)
Teslin A	Canada	Record low maximum temperature	-2.8 C (27.0 F)	29 of 100 (Routine)
Hay River A	Canada	Record low minimum temperature	-11.7 C (10.9 F)	29 of 100 (Routine)
Dundurn	Canada	Record low maximum temperature	-1.1 C (30.0 F)	29 of 100 (Routine)
Elsenburg	South Africa	Record daily precipitation	26.6 mm (1.0 in)	29 of 100 (Routine)
Tortosa - Observatorio del Ebr	Spain	Record low minimum temperature	8.7 C (47.7 F)	29 of 100 (Routine)
Ainsworth	United States	Record low minimum temperature	-3.3 C (26.1 F)	29 of 100 (Routine)

Counts by Type and Timescale

742 records

Records set or tied on 30 September 1974 by type: Highest daily maximum 66, Lowest daily maximum 175, Highest daily minimum 57, Lowest daily minimum 250, Heaviest daily rainfall 154, Heaviest daily snowfall 40.

Records on 30 September 1974 by type
Record type	Records
Highest daily maximum	66
Lowest daily maximum	175
Highest daily minimum	57
Lowest daily minimum	250
Heaviest daily rainfall	154
Heaviest daily snowfall	40
Deepest snow cover	0

Records on 30 September 1974 by timescale: all-time 1, monthly 65, daily 676.

How Much Records Were Beaten By

595 broken records

Margins by which the 595 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 107.0. Ties are not counted.

Top 20 by Significance

30 September 1974

Top 20 records on 30 September 1974 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1974	Atlin, CA	monthly snowfall	21.6 cm (8.5 in)	10.7 cm (4.2 in)	51 years	72 of 100 (Major)
30 September 1974	Oestersund-Froesoen, SE	daily rain	27.8 mm (1.1 in)	15.1 mm (0.6 in)	65 years	59 of 100 (Notable)
30 September 1974	Hakea, AU	daily rain	25.4 mm (1.0 in)	19.0 mm (0.7 in)	37 years	57 of 100 (Notable)
30 September 1974	Nitchequon, CA	monthly snowfall	28.2 cm (11.1 in)	10.2 cm (4.0 in)	32 years	56 of 100 (Notable)
30 September 1974	Ruhnu, LV	daily rain	33.6 mm (1.3 in)	17.9 mm (0.7 in)	37 years	51 of 100 (Notable)
30 September 1974	Tallinn, EE	daily rain	30.0 mm (1.2 in)	11.6 mm (0.5 in)	61 years	49 of 100 (Notable)
30 September 1974	Philadelphia Polisie, ZA	daily rain	28.0 mm (1.1 in)	19.1 mm (0.8 in)	24 years	48 of 100 (Notable)
30 September 1974	Nitchequon, CA	monthly rain	54.9 mm (2.2 in)	18.6 mm (0.7 in)	7 years	46 of 100 (Notable)
30 September 1974	Kihnu, EE	daily rain	33.1 mm (1.3 in)	17.3 mm (0.7 in)	35 years	46 of 100 (Notable)
30 September 1974	Grenfell, CA	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	89 years	45 of 100 (Notable)
30 September 1974	Ilyinskiy, RU	daily rain	52.2 mm (2.1 in)	44.3 mm (1.7 in)	4 years	44 of 100 (Notable)
30 September 1974	Morozovsk, RU	daily rain	33.0 mm (1.3 in)	21.9 mm (0.9 in)	5 years	44 of 100 (Notable)
30 September 1974	Langgewens (Wrs), ZA	daily rain	33.0 mm (1.3 in)	21.1 mm (0.8 in)	24 years	43 of 100 (Notable)
30 September 1974	Nepabunna Mission, AU	daily rain	27.6 mm (1.1 in)	27.6 mm (1.1 in)	35 years	41 of 100 (Notable)
30 September 1974	Atlin, CA	monthly low max	-2.2 C (28.0 F)	3.3 C (5.9 F)	51 years	40 of 100 (Notable)
30 September 1974	The Towers, ZA	daily rain	28.0 mm (1.1 in)	8.2 mm (0.32 in)	60 years	38 of 100 (Notable)
30 September 1974	Coimbra, PT	daily low min	5.6 C (42.1 F)	2.6 C (4.7 F)	68 years	37 of 100 (Notable)
30 September 1974	Tempe Downs, AU	daily rain	30.0 mm (1.2 in)	16.3 mm (0.6 in)	28 years	36 of 100 (Notable)
30 September 1974	Coniston, CA	monthly snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	49 years	36 of 100 (Notable)
30 September 1974	Kuusiku, EE	daily rain	32.3 mm (1.3 in)	16.7 mm (0.7 in)	7 years	36 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 1974

Records set or tied on this calendar date in each year from 1806 to 1974. 1974 had 742 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 1974-09-30: 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 20	569
20 to 40	18
40 to 60	3
60 to 80	2
80 to 100	1
100 to 120	2