Weather Records on 30 September 1946

320 weather records were set or tied worldwide on 30 September 1946. Highest significance: Yercaud, IN.

Key Facts for 30 September 1946

On 30 September 1946, 320 weather records were set or tied at long-record stations worldwide.
135 were record highs and 47 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 304 daily.
Yercaud set a monthly record daily precipitation of 239.3 mm (9.4 in) on 30 September 1946.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 440 records.

Record Map

320 stations

320 station records on 30 September 1946 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1946: highest significance records shown on the map
Station	Country	Type	Value	Significance
Yercaud	India	Record daily precipitation	239.3 mm (9.4 in)	58 of 100 (Notable)
Chicoutimi	Canada	Record daily precipitation	64.5 mm (2.5 in)	54 of 100 (Notable)
La Pocatiere Cda	Canada	Record daily precipitation	124.5 mm (4.9 in)	53 of 100 (Notable)
Manchester	United States	Record daily precipitation	85.9 mm (3.4 in)	49 of 100 (Notable)
Shikarpur	India	Record daily precipitation	63.5 mm (2.5 in)	45 of 100 (Notable)
Babuskin	Russia	Record daily precipitation	37.5 mm (1.5 in)	43 of 100 (Notable)
North Bridgton	United States	Record daily precipitation	103.1 mm (4.1 in)	41 of 100 (Notable)
Lake Megantic	Canada	Record daily precipitation	51.1 mm (2.0 in)	39 of 100 (Notable)
Grand Canyon HQ	United States	Record daily precipitation	36.1 mm (1.4 in)	37 of 100 (Notable)
Groton	United States	Record daily precipitation	48.8 mm (1.9 in)	36 of 100 (Notable)
Framingham	United States	Record daily precipitation	81.8 mm (3.2 in)	35 of 100 (Notable)
Mina	United States	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Auburn	United States	Record daily precipitation	52.1 mm (2.1 in)	34 of 100 (Routine)
Mickleham	Australia	Record daily precipitation	33.5 mm (1.3 in)	33 of 100 (Routine)
Ashland	United States	Record daily precipitation	79.0 mm (3.1 in)	33 of 100 (Routine)
Brenham	United States	Record daily precipitation	35.3 mm (1.4 in)	33 of 100 (Routine)
Avalon Pleasure Pier	United States	Record high maximum temperature	32.8 C (91.0 F)	32 of 100 (Routine)
Middleboro	United States	Record daily precipitation	40.4 mm (1.6 in)	32 of 100 (Routine)
Sherburne	United States	Record daily precipitation	34.5 mm (1.4 in)	32 of 100 (Routine)
Bartow 1SE	United States	Record daily precipitation	66.0 mm (2.6 in)	31 of 100 (Routine)
Potkabari	India	Record daily precipitation	47.8 mm (1.9 in)	30 of 100 (Routine)
Rumford	United States	Record daily precipitation	95.8 mm (3.8 in)	30 of 100 (Routine)
Spot Pond	United States	Record daily precipitation	64.8 mm (2.6 in)	30 of 100 (Routine)
Chatham	Canada	Record high maximum temperature	24.4 C (75.9 F)	29 of 100 (Routine)
Idaho Springs	United States	Record low minimum temperature	-6.1 C (21.0 F)	28 of 100 (Routine)
Freehold-Marlboro	United States	Record daily precipitation	39.4 mm (1.6 in)	28 of 100 (Routine)
Harlingen	United States	Record daily precipitation	77.5 mm (3.1 in)	28 of 100 (Routine)
Turners Falls	United States	Record daily precipitation	41.7 mm (1.6 in)	26 of 100 (Routine)
Baldwinsville	United States	Record daily precipitation	26.4 mm (1.0 in)	26 of 100 (Routine)
Bedford Hills	United States	Record daily precipitation	88.9 mm (3.5 in)	26 of 100 (Routine)
Cortland	United States	Record daily precipitation	40.1 mm (1.6 in)	26 of 100 (Routine)
Watertown	United States	Record daily precipitation	46.5 mm (1.8 in)	26 of 100 (Routine)
Hanksville	United States	Record high minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
La Tuque	Canada	Record daily precipitation	42.4 mm (1.7 in)	25 of 100 (Routine)
Lawrence	United States	Record daily precipitation	61.0 mm (2.4 in)	25 of 100 (Routine)
Allakaket	United States	Record low minimum temperature	-18.3 C (-0.9 F)	24 of 100 (Routine)
Ft Yukon	United States	Record low maximum temperature	-2.8 C (27.0 F)	24 of 100 (Routine)
Stewart	Canada	Record low maximum temperature	7.2 C (45.0 F)	23 of 100 (Routine)
Sherbrooke	Canada	Record daily precipitation	37.1 mm (1.5 in)	23 of 100 (Routine)
Thirthahalli	India	Record daily precipitation	57.2 mm (2.3 in)	23 of 100 (Routine)
Casa Grande	United States	Record low maximum temperature	25.6 C (78.1 F)	23 of 100 (Routine)
Tupper Lake Sunmount	United States	Record daily precipitation	30.0 mm (1.2 in)	23 of 100 (Routine)
Beaver	United States	Record high minimum temperature	12.8 C (55.0 F)	23 of 100 (Routine)
Kennecott	United States	Record low minimum temperature	-8.3 C (17.1 F)	23 of 100 (Routine)
Channel	Canada	Record high minimum temperature	13.3 C (55.9 F)	22 of 100 (Routine)
Blue Hill Coop	United States	Record daily precipitation	43.9 mm (1.7 in)	22 of 100 (Routine)
Brownsville	United States	Record daily precipitation	69.6 mm (2.7 in)	22 of 100 (Routine)
Roberval Nord	Canada	Record daily precipitation	62.2 mm (2.4 in)	21 of 100 (Routine)
Belle Isle	Canada	Record high maximum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Junnar	India	Record daily precipitation	72.1 mm (2.8 in)	21 of 100 (Routine)
Meeker	United States	Record high maximum temperature	27.2 C (81.0 F)	21 of 100 (Routine)
Bothwell (Cluny)	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Tahoe City	United States	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Lara Lake	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Palm Springs	United States	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Keilor (Arundel)	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Lovely Banks (Reservoir)	Australia	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Les Cedres	Canada	Record daily snowfall	1.3 cm (0.5 in)	20 of 100 (Routine)
Grand View 4 NW	United States	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Carson City	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)

Counts by Type and Timescale

320 records

Records set or tied on 30 September 1946 by type: Highest daily maximum 77, Lowest daily maximum 20, Highest daily minimum 58, Lowest daily minimum 27, Heaviest daily rainfall 135, Heaviest daily snowfall 3.

Records on 30 September 1946 by type
Record type	Records
Highest daily maximum	77
Lowest daily maximum	20
Highest daily minimum	58
Lowest daily minimum	27
Heaviest daily rainfall	135
Heaviest daily snowfall	3
Deepest snow cover	0

Records on 30 September 1946 by timescale: all-time 1, monthly 15, daily 304.

How Much Records Were Beaten By

248 broken records

Margins by which the 248 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 88.9. Ties are not counted.

Top 20 by Significance

30 September 1946

Top 20 records on 30 September 1946 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1946	Yercaud, IN	monthly rain	239.3 mm (9.4 in)	88.9 mm (3.5 in)	15 years	58 of 100 (Notable)
30 September 1946	Chicoutimi, CA	monthly rain	64.5 mm (2.5 in)	16.2 mm (0.6 in)	54 years	54 of 100 (Notable)
30 September 1946	La Pocatiere Cda, CA	all-time rain	124.5 mm (4.9 in)	31.5 mm (1.2 in)	4 years	53 of 100 (Notable)
30 September 1946	Manchester, US	daily rain	85.9 mm (3.4 in)	68.9 mm (2.7 in)	12 years	49 of 100 (Notable)
30 September 1946	Shikarpur, IN	daily rain	63.5 mm (2.5 in)	40.6 mm (1.6 in)	8 years	45 of 100 (Notable)
30 September 1946	Babuskin, RU	daily rain	37.5 mm (1.5 in)	27.7 mm (1.1 in)	21 years	43 of 100 (Notable)
30 September 1946	North Bridgton, US	daily rain	103.1 mm (4.1 in)	41.4 mm (1.6 in)	25 years	41 of 100 (Notable)
30 September 1946	Lake Megantic, CA	daily rain	51.1 mm (2.0 in)	28.2 mm (1.1 in)	28 years	39 of 100 (Notable)
30 September 1946	Grand Canyon HQ, US	daily rain	36.1 mm (1.4 in)	22.1 mm (0.9 in)	35 years	37 of 100 (Notable)
30 September 1946	Groton, US	daily rain	48.8 mm (1.9 in)	26.7 mm (1.1 in)	50 years	36 of 100 (Notable)
30 September 1946	Framingham, US	daily rain	81.8 mm (3.2 in)	44.5 mm (1.8 in)	25 years	35 of 100 (Notable)
30 September 1946	Mina, US	monthly rain	27.9 mm (1.1 in)	5.0 mm (0.20 in)	42 years	34 of 100 (Routine)
30 September 1946	Auburn, US	daily rain	52.1 mm (2.1 in)	23.4 mm (0.9 in)	21 years	34 of 100 (Routine)
30 September 1946	Mickleham, AU	daily rain	33.5 mm (1.3 in)	15.2 mm (0.6 in)	35 years	33 of 100 (Routine)
30 September 1946	Ashland, US	daily rain	79.0 mm (3.1 in)	43.4 mm (1.7 in)	25 years	33 of 100 (Routine)
30 September 1946	Brenham, US	daily rain	35.3 mm (1.4 in)	23.9 mm (0.9 in)	24 years	33 of 100 (Routine)
30 September 1946	Avalon Pleasure Pier, US	daily high max	32.8 C (91.0 F)	5.0 C (9.0 F)	36 years	32 of 100 (Routine)
30 September 1946	Middleboro, US	daily rain	40.4 mm (1.6 in)	24.1 mm (0.9 in)	49 years	32 of 100 (Routine)
30 September 1946	Sherburne, US	daily rain	34.5 mm (1.4 in)	23.8 mm (0.9 in)	29 years	32 of 100 (Routine)
30 September 1946	Bartow 1SE, US	daily rain	66.0 mm (2.6 in)	38.1 mm (1.5 in)	28 years	31 of 100 (Routine)

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 1946

Records set or tied on this calendar date in each year from 1806 to 1946. 1946 had 320 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	523

Download the Data

Data for records on 1946-09-30: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 20	224
20 to 40	17
40 to 60	5
60 to 80	1
80 to 100	1