Weather Records on 18 September 1946

576 weather records were set or tied worldwide on 18 September 1946. Highest significance: Gammon Ranges (Wooltana), AU.

Key Facts for 18 September 1946

On 18 September 1946, 576 weather records were set or tied at long-record stations worldwide.
134 were record highs and 156 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 42 monthly and 530 daily.
Gammon Ranges (Wooltana) set a monthly record daily precipitation of 68.6 mm (2.7 in) on 18 September 1946.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 420 records.

Record Map

576 stations

576 station records on 18 September 1946 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1946: highest significance records shown on the map
Station	Country	Type	Value	Significance
Gammon Ranges (Wooltana)	Australia	Record daily precipitation	68.6 mm (2.7 in)	69 of 100 (Major)
Hay Springs	United States	Record daily precipitation	85.3 mm (3.4 in)	67 of 100 (Major)
Ajo	United States	Record daily precipitation	105.4 mm (4.1 in)	64 of 100 (Major)
Edgeley 3WNW	United States	Record daily precipitation	110.2 mm (4.3 in)	63 of 100 (Major)
Jamestown State Hosp	United States	Record daily precipitation	48.8 mm (1.9 in)	58 of 100 (Notable)
Chatra	India	Record daily precipitation	223.8 mm (8.8 in)	57 of 100 (Notable)
Bhabua	India	Record daily precipitation	132.1 mm (5.2 in)	55 of 100 (Notable)
Manoharpur	India	Record daily precipitation	190.5 mm (7.5 in)	54 of 100 (Notable)
Koath	India	Record daily precipitation	114.3 mm (4.5 in)	52 of 100 (Notable)
Chandauli	India	Record daily precipitation	192.0 mm (7.6 in)	52 of 100 (Notable)
Alliance 1WNW	United States	Record daily precipitation	32.5 mm (1.3 in)	52 of 100 (Notable)
Lila Lower	Australia	Record daily precipitation	70.1 mm (2.8 in)	51 of 100 (Notable)
Netarhat	India	Record daily precipitation	181.6 mm (7.1 in)	51 of 100 (Notable)
Arrah Obsy Sr	India	Record daily precipitation	171.5 mm (6.8 in)	51 of 100 (Notable)
Cumbres	United States	Record daily precipitation	68.6 mm (2.7 in)	51 of 100 (Notable)
Grafton	United States	Record daily precipitation	64.5 mm (2.5 in)	51 of 100 (Notable)
Pembina	United States	Record daily precipitation	63.0 mm (2.5 in)	51 of 100 (Notable)
Tibooburra (Olive Downs)	Australia	Record daily precipitation	29.2 mm (1.1 in)	50 of 100 (Notable)
Nabinagar	India	Record daily precipitation	208.3 mm (8.2 in)	50 of 100 (Notable)
Sikraul	India	Record daily precipitation	130.8 mm (5.1 in)	50 of 100 (Notable)
Bandwan	India	Record daily precipitation	101.6 mm (4.0 in)	50 of 100 (Notable)
Gann Valley 4NW	United States	Record daily precipitation	47.0 mm (1.9 in)	49 of 100 (Notable)
Byrock Post Office	Australia	Record daily precipitation	26.7 mm (1.1 in)	48 of 100 (Notable)
Hunterganj	India	Record daily precipitation	305.8 mm (12.0 in)	48 of 100 (Notable)
Butte	United States	Record daily precipitation	52.6 mm (2.1 in)	48 of 100 (Notable)
Bowdle	United States	Record daily precipitation	49.8 mm (2.0 in)	48 of 100 (Notable)
Gammon Ranges (Wertaloona)	Australia	Record daily precipitation	49.5 mm (1.9 in)	47 of 100 (Notable)
Sherghati	India	Record daily precipitation	250.2 mm (9.9 in)	47 of 100 (Notable)
Garhwa	India	Record daily precipitation	132.1 mm (5.2 in)	47 of 100 (Notable)
Patan	India	Record daily precipitation	148.6 mm (5.9 in)	47 of 100 (Notable)
Bassawan	India	Record daily precipitation	142.2 mm (5.6 in)	47 of 100 (Notable)
Gila Bend 2SE	United States	Record daily precipitation	64.0 mm (2.5 in)	47 of 100 (Notable)
Natural Brg	United States	Record daily precipitation	77.0 mm (3.0 in)	47 of 100 (Notable)
Roosevelt 1 S	United States	Record daily precipitation	86.4 mm (3.4 in)	47 of 100 (Notable)
Ashley	United States	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Steele 4N	United States	Record daily precipitation	40.9 mm (1.6 in)	47 of 100 (Notable)
Snowflake	United States	Record daily precipitation	47.0 mm (1.9 in)	46 of 100 (Notable)
Angus 1 N	United States	Record daily precipitation	46.0 mm (1.8 in)	46 of 100 (Notable)
Maricopa 9 SSW	United States	Record daily precipitation	68.3 mm (2.7 in)	45 of 100 (Notable)
Merriman	United States	Record daily precipitation	30.5 mm (1.2 in)	45 of 100 (Notable)
Miller	United States	Record daily precipitation	49.0 mm (1.9 in)	45 of 100 (Notable)
Aurangabad	India	Record daily precipitation	222.3 mm (8.8 in)	44 of 100 (Notable)
Pollock	United States	Record daily precipitation	50.0 mm (2.0 in)	43 of 100 (Notable)
Glenelg	Australia	Record daily precipitation	41.9 mm (1.6 in)	42 of 100 (Notable)
Tibooburra Post Office	Australia	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Fort Bourke	Australia	Record daily precipitation	55.9 mm (2.2 in)	42 of 100 (Notable)
Ranka	India	Record daily precipitation	120.7 mm (4.8 in)	42 of 100 (Notable)
Ipswich	United States	Record daily precipitation	43.2 mm (1.7 in)	41 of 100 (Notable)
Hallock	United States	Record daily precipitation	57.2 mm (2.3 in)	39 of 100 (Notable)
Black Rock	United States	Record daily precipitation	30.7 mm (1.2 in)	39 of 100 (Notable)
Sitka Magnetic Obsy	United States	Record daily precipitation	83.8 mm (3.3 in)	39 of 100 (Notable)
Latehar	India	Record daily precipitation	102.6 mm (4.0 in)	38 of 100 (Notable)
Daltonganj	India	Record daily precipitation	187.5 mm (7.4 in)	38 of 100 (Notable)
Jalalpur	India	Record daily precipitation	90.7 mm (3.6 in)	38 of 100 (Notable)
White Lake	United States	Record daily precipitation	33.3 mm (1.3 in)	38 of 100 (Notable)
Chenari	India	Record daily precipitation	127.0 mm (5.0 in)	37 of 100 (Notable)
Intake	United States	Record daily precipitation	63.5 mm (2.5 in)	37 of 100 (Notable)
Lakin	United States	Record daily precipitation	32.0 mm (1.3 in)	37 of 100 (Notable)
Hillsboro 3 N	United States	Record daily precipitation	44.5 mm (1.8 in)	36 of 100 (Notable)
Wood	United States	Record daily precipitation	33.3 mm (1.3 in)	36 of 100 (Notable)

Counts by Type and Timescale

576 records

Records set or tied on 18 September 1946 by type: Highest daily maximum 88, Lowest daily maximum 116, Highest daily minimum 46, Lowest daily minimum 40, Heaviest daily rainfall 286.

Records on 18 September 1946 by type
Record type	Records
Highest daily maximum	88
Lowest daily maximum	116
Highest daily minimum	46
Lowest daily minimum	40
Heaviest daily rainfall	286
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1946 by timescale: all-time 4, monthly 42, daily 530.

How Much Records Were Beaten By

499 broken records

Margins by which the 499 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 211.3. Ties are not counted.

Top 20 by Significance

18 September 1946

Top 20 records on 18 September 1946 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1946	Gammon Ranges (Wooltana), AU	monthly rain	68.6 mm (2.7 in)	36.8 mm (1.4 in)	43 years	69 of 100 (Major)
18 September 1946	Hay Springs, US	monthly rain	85.3 mm (3.4 in)	34.5 mm (1.4 in)	42 years	67 of 100 (Major)
18 September 1946	Ajo, US	all-time rain	105.4 mm (4.1 in)	24.9 mm (1.0 in)	23 years	64 of 100 (Major)
18 September 1946	Edgeley 3WNW, US	monthly rain	110.2 mm (4.3 in)	54.3 mm (2.1 in)	33 years	63 of 100 (Major)
18 September 1946	Jamestown State Hosp, US	daily rain	48.8 mm (1.9 in)	34.3 mm (1.4 in)	40 years	58 of 100 (Notable)
18 September 1946	Chatra, IN	daily rain	223.8 mm (8.8 in)	197.9 mm (7.8 in)	44 years	57 of 100 (Notable)
18 September 1946	Bhabua, IN	daily rain	132.1 mm (5.2 in)	111.3 mm (4.4 in)	36 years	55 of 100 (Notable)
18 September 1946	Manoharpur, IN	daily rain	190.5 mm (7.5 in)	151.9 mm (6.0 in)	35 years	54 of 100 (Notable)
18 September 1946	Koath, IN	daily rain	114.3 mm (4.5 in)	88.9 mm (3.5 in)	28 years	52 of 100 (Notable)
18 September 1946	Chandauli, IN	daily rain	192.0 mm (7.6 in)	170.7 mm (6.7 in)	28 years	52 of 100 (Notable)
18 September 1946	Alliance 1WNW, US	daily rain	32.5 mm (1.3 in)	24.1 mm (0.9 in)	49 years	52 of 100 (Notable)
18 September 1946	Lila Lower, AU	monthly rain	70.1 mm (2.8 in)	20.3 mm (0.8 in)	43 years	51 of 100 (Notable)
18 September 1946	Netarhat, IN	monthly rain	181.6 mm (7.1 in)	70.6 mm (2.8 in)	2 years	51 of 100 (Notable)
18 September 1946	Arrah Obsy Sr, IN	daily rain	171.5 mm (6.8 in)	148.9 mm (5.9 in)	24 years	51 of 100 (Notable)
18 September 1946	Cumbres, US	daily rain	68.6 mm (2.7 in)	40.4 mm (1.6 in)	23 years	51 of 100 (Notable)
18 September 1946	Grafton, US	daily rain	64.5 mm (2.5 in)	47.2 mm (1.9 in)	20 years	51 of 100 (Notable)
18 September 1946	Pembina, US	daily rain	63.0 mm (2.5 in)	47.8 mm (1.9 in)	24 years	51 of 100 (Notable)
18 September 1946	Tibooburra (Olive Downs), AU	daily rain	29.2 mm (1.1 in)	23.6 mm (0.9 in)	43 years	50 of 100 (Notable)
18 September 1946	Nabinagar, IN	daily rain	208.3 mm (8.2 in)	116.9 mm (4.6 in)	20 years	50 of 100 (Notable)
18 September 1946	Sikraul, IN	daily rain	130.8 mm (5.1 in)	105.4 mm (4.1 in)	20 years	50 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

1803 to 1946

Records set or tied on this calendar date in each year from 1803 to 1946. 1946 had 576 records.

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

Records on 09-18 in each year
Year	Records
1803	1
1811	1
1814	1
1819	1
1829	1
1832	1
1834	1
1835	1
1837	2
1847	2
1848	1
1849	1
1851	4
1859	1
1861	1
1865	1
1869	1
1871	1
1875	1
1876	2
1877	1
1879	1
1880	1
1881	1
1882	1
1885	1
1886	4
1889	6
1890	1
1891	1
1893	4
1894	2
1895	2
1896	4
1897	3
1898	5
1899	3
1900	2
1901	10
1902	8
1903	58
1904	6
1905	22
1906	16
1907	4
1908	11
1909	17
1910	5
1911	8
1912	43
1913	44
1914	56
1915	41
1916	58
1917	99
1918	57
1919	48
1920	56
1921	213
1922	45
1923	114
1924	62
1925	269
1926	205
1927	189
1928	114
1929	309
1930	124
1931	429
1932	226
1933	370
1934	188
1935	281
1936	155
1937	422
1938	373
1939	190
1940	402
1941	318
1942	1,001
1943	624
1944	503
1945	732
1946	576
1947	927
1948	427
1949	356
1950	370
1951	320
1952	340
1953	245
1954	446
1955	672
1956	587
1957	429
1958	491
1959	829
1960	351
1961	478
1962	360
1963	453
1964	282
1965	1,172
1966	498
1967	357
1968	763
1969	424
1970	377
1971	1,245
1972	691
1973	593
1974	559
1975	976
1976	615
1977	619
1978	1,162
1979	709
1980	652
1981	1,671
1982	603
1983	936
1984	951
1985	636
1986	730
1987	1,244
1988	997
1989	778
1990	904
1991	1,377
1992	821
1993	747
1994	852
1995	935
1996	1,237
1997	935
1998	1,038
1999	583
2000	1,146
2001	993
2002	828
2003	815
2004	1,027
2005	781
2006	1,309
2007	670
2008	697
2009	692
2010	1,040
2011	1,050
2012	922
2013	666
2014	682
2015	934
2016	893
2017	518
2018	1,200
2019	768
2020	682
2021	582
2022	613
2023	639
2024	687
2025	471
2026	864

Download the Data

Data for records on 1946-09-18: 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 50	469
50 to 100	19
100 to 150	7
150 to 200	3
200 to 250	1