Weather Records on 18 September 1949

356 weather records were set or tied worldwide on 18 September 1949. Highest significance: Le Roy, US.

Key Facts for 18 September 1949

On 18 September 1949, 356 weather records were set or tied at long-record stations worldwide.
86 were record highs and 66 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 347 daily.
Le Roy set a daily record precipitation of 112.5 mm (4.4 in) on 18 September 1949.
Across 163 earlier years (1803 to 2026) the same calendar date averaged 422 records.

Record Map

356 stations

356 station records on 18 September 1949 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 September 1949: highest significance records shown on the map
Station	Country	Type	Value	Significance
Le Roy	United States	Record daily precipitation	112.5 mm (4.4 in)	54 of 100 (Notable)
Howell Wwtp	United States	Record daily precipitation	52.6 mm (2.1 in)	51 of 100 (Notable)
Hardoi	India	Record daily precipitation	190.5 mm (7.5 in)	50 of 100 (Notable)
Columbus	United States	Record daily precipitation	72.4 mm (2.9 in)	49 of 100 (Notable)
Seymour 1 NNW	United States	Record daily precipitation	70.4 mm (2.8 in)	47 of 100 (Notable)
Jalaun	India	Record daily precipitation	106.2 mm (4.2 in)	46 of 100 (Notable)
Bharthana	India	Record daily precipitation	81.8 mm (3.2 in)	45 of 100 (Notable)
Shahjahanpur	India	Record daily precipitation	170.2 mm (6.7 in)	42 of 100 (Notable)
Kheri	India	Record daily precipitation	114.6 mm (4.5 in)	41 of 100 (Notable)
Mainpuri	India	Record daily precipitation	95.0 mm (3.7 in)	41 of 100 (Notable)
Simcoe	Canada	Record daily precipitation	44.5 mm (1.8 in)	40 of 100 (Notable)
Walnut 4S	United States	Record daily precipitation	69.9 mm (2.8 in)	40 of 100 (Notable)
Goderich Township	Canada	Record daily precipitation	34.8 mm (1.4 in)	39 of 100 (Notable)
Bilgram	India	Record daily precipitation	119.6 mm (4.7 in)	39 of 100 (Notable)
Orai	India	Record daily precipitation	81.3 mm (3.2 in)	39 of 100 (Notable)
Dumas	United States	Record daily precipitation	69.9 mm (2.8 in)	38 of 100 (Notable)
Bhognipur	India	Record daily precipitation	155.2 mm (6.1 in)	37 of 100 (Notable)
Brucefield	Canada	Record daily precipitation	28.2 mm (1.1 in)	36 of 100 (Notable)
Bilhaur	India	Record daily precipitation	155.2 mm (6.1 in)	36 of 100 (Notable)
Jalesar	India	Record daily precipitation	166.9 mm (6.6 in)	35 of 100 (Notable)
Fayetteville Exp STN	United States	Record daily precipitation	117.9 mm (4.6 in)	35 of 100 (Notable)
Warsaw 1	United States	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Naraingarh	India	Record daily precipitation	138.9 mm (5.5 in)	34 of 100 (Routine)
Union	United States	Record daily precipitation	52.6 mm (2.1 in)	34 of 100 (Routine)
Deols Chateauroux Aerodrome de	France	Record daily precipitation	37.4 mm (1.5 in)	33 of 100 (Routine)
Auraiya	India	Record daily precipitation	112.5 mm (4.4 in)	33 of 100 (Routine)
Mainpuri	India	Record daily precipitation	94.5 mm (3.7 in)	33 of 100 (Routine)
Grenola 1 N	United States	Record daily precipitation	64.0 mm (2.5 in)	33 of 100 (Routine)
Middlesboro Fire Dept	United States	Record daily precipitation	42.2 mm (1.7 in)	33 of 100 (Routine)
Murphy 4ESE	United States	Record daily precipitation	32.3 mm (1.3 in)	33 of 100 (Routine)
Howard 2SE	United States	Record daily precipitation	73.9 mm (2.9 in)	32 of 100 (Routine)
Mt Clemens Ang Base	United States	Record daily precipitation	49.8 mm (2.0 in)	32 of 100 (Routine)
Mohanlalganj	India	Record daily precipitation	97.3 mm (3.8 in)	31 of 100 (Routine)
Neosho	United States	Record daily precipitation	54.9 mm (2.2 in)	31 of 100 (Routine)
Wallaceburg	Canada	Record daily precipitation	33.8 mm (1.3 in)	30 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record low minimum temperature	-10.6 C (12.9 F)	30 of 100 (Routine)
Bjuraker	Sweden	Record high minimum temperature	13.6 C (56.5 F)	30 of 100 (Routine)
Eureka Springs 3 WNW	United States	Record daily precipitation	37.6 mm (1.5 in)	30 of 100 (Routine)
Bah	India	Record daily precipitation	66.8 mm (2.6 in)	29 of 100 (Routine)
Jefferson City Wtp	United States	Record daily precipitation	42.7 mm (1.7 in)	29 of 100 (Routine)
Shimla	India	Record daily precipitation	77.2 mm (3.0 in)	28 of 100 (Routine)
Dholpur	India	Record daily precipitation	101.6 mm (4.0 in)	28 of 100 (Routine)
Garotha	India	Record daily precipitation	59.2 mm (2.3 in)	28 of 100 (Routine)
Valparaiso Wtr Wks	United States	Record daily precipitation	69.1 mm (2.7 in)	28 of 100 (Routine)
Narsingarh	India	Record daily precipitation	82.0 mm (3.2 in)	27 of 100 (Routine)
Tot-Ma	Russia	Record low minimum temperature	-4.6 C (23.7 F)	27 of 100 (Routine)
Gravette	United States	Record daily precipitation	44.5 mm (1.8 in)	27 of 100 (Routine)
Warsaw 2	United States	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	35.1 mm (1.4 in)	26 of 100 (Routine)
Farrukhabad	India	Record daily precipitation	56.4 mm (2.2 in)	26 of 100 (Routine)
Albion	United States	Record daily precipitation	47.5 mm (1.9 in)	26 of 100 (Routine)
Albion	United States	Record daily precipitation	52.3 mm (2.1 in)	26 of 100 (Routine)
Valley Park	United States	Record daily precipitation	44.5 mm (1.8 in)	26 of 100 (Routine)
Bremen-Seefahrtschule	Germany	Record daily precipitation	25.1 mm (1.0 in)	25 of 100 (Routine)
Churu	India	Record daily precipitation	50.8 mm (2.0 in)	25 of 100 (Routine)
Sirkali	India	Record daily precipitation	58.7 mm (2.3 in)	25 of 100 (Routine)
Tarabganj	India	Record daily precipitation	65.5 mm (2.6 in)	25 of 100 (Routine)
Khutar	India	Record daily precipitation	73.7 mm (2.9 in)	25 of 100 (Routine)
Hasanganj	India	Record daily precipitation	121.4 mm (4.8 in)	25 of 100 (Routine)
Fayetteville	United States	Record daily precipitation	119.9 mm (4.7 in)	25 of 100 (Routine)

Counts by Type and Timescale

356 records

Records set or tied on 18 September 1949 by type: Highest daily maximum 21, Lowest daily maximum 14, Highest daily minimum 65, Lowest daily minimum 52, Heaviest daily rainfall 204.

Records on 18 September 1949 by type
Record type	Records
Highest daily maximum	21
Lowest daily maximum	14
Highest daily minimum	65
Lowest daily minimum	52
Heaviest daily rainfall	204
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 September 1949 by timescale: all-time 0, monthly 9, daily 347.

How Much Records Were Beaten By

289 broken records

Margins by which the 289 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 99.5. Ties are not counted.

Top 20 by Significance

18 September 1949

Top 20 records on 18 September 1949 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 September 1949	Le Roy, US	daily rain	112.5 mm (4.4 in)	99.5 mm (3.9 in)	34 years	54 of 100 (Notable)
18 September 1949	Howell Wwtp, US	daily rain	52.6 mm (2.1 in)	33.5 mm (1.3 in)	49 years	51 of 100 (Notable)
18 September 1949	Hardoi, IN	daily rain	190.5 mm (7.5 in)	97.8 mm (3.9 in)	35 years	50 of 100 (Notable)
18 September 1949	Columbus, US	daily rain	72.4 mm (2.9 in)	54.1 mm (2.1 in)	52 years	49 of 100 (Notable)
18 September 1949	Seymour 1 NNW, US	daily rain	70.4 mm (2.8 in)	44.5 mm (1.8 in)	47 years	47 of 100 (Notable)
18 September 1949	Jalaun, IN	daily rain	106.2 mm (4.2 in)	89.7 mm (3.5 in)	8 years	46 of 100 (Notable)
18 September 1949	Bharthana, IN	daily rain	81.8 mm (3.2 in)	57.2 mm (2.3 in)	39 years	45 of 100 (Notable)
18 September 1949	Shahjahanpur, IN	daily rain	170.2 mm (6.7 in)	98.6 mm (3.9 in)	4 years	42 of 100 (Notable)
18 September 1949	Kheri, IN	daily rain	114.6 mm (4.5 in)	74.7 mm (2.9 in)	44 years	41 of 100 (Notable)
18 September 1949	Mainpuri, IN	daily rain	95.0 mm (3.7 in)	56.4 mm (2.2 in)	38 years	41 of 100 (Notable)
18 September 1949	Simcoe, CA	daily rain	44.5 mm (1.8 in)	31.8 mm (1.3 in)	4 years	40 of 100 (Notable)
18 September 1949	Walnut 4S, US	daily rain	69.9 mm (2.8 in)	47.3 mm (1.9 in)	44 years	40 of 100 (Notable)
18 September 1949	Goderich Township, CA	daily rain	34.8 mm (1.4 in)	24.1 mm (0.9 in)	36 years	39 of 100 (Notable)
18 September 1949	Bilgram, IN	daily rain	119.6 mm (4.7 in)	56.9 mm (2.2 in)	32 years	39 of 100 (Notable)
18 September 1949	Orai, IN	daily rain	81.3 mm (3.2 in)	46.8 mm (1.8 in)	39 years	39 of 100 (Notable)
18 September 1949	Dumas, US	daily rain	69.9 mm (2.8 in)	40.7 mm (1.6 in)	34 years	38 of 100 (Notable)
18 September 1949	Bhognipur, IN	daily rain	155.2 mm (6.1 in)	58.4 mm (2.3 in)	39 years	37 of 100 (Notable)
18 September 1949	Brucefield, CA	daily rain	28.2 mm (1.1 in)	17.8 mm (0.7 in)	36 years	36 of 100 (Notable)
18 September 1949	Bilhaur, IN	daily rain	155.2 mm (6.1 in)	61.2 mm (2.4 in)	34 years	36 of 100 (Notable)
18 September 1949	Jalesar, IN	monthly rain	166.9 mm (6.6 in)	21.9 mm (0.9 in)	37 years	35 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 1949

Records set or tied on this calendar date in each year from 1803 to 1949. 1949 had 356 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 1949-09-18: 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 20	222
20 to 40	41
40 to 60	19
60 to 80	3
80 to 100	4