Weather Records on 18 August 1949

393 weather records were set or tied worldwide on 18 August 1949. Highest significance: Mainpuri, IN.

Key Facts for 18 August 1949

On 18 August 1949, 393 weather records were set or tied at long-record stations worldwide.
79 were record highs and 114 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 8 monthly and 379 daily.
Mainpuri set an all-time record daily precipitation of 256.3 mm (10.1 in) on 18 August 1949.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 441 records.

Record Map

393 stations

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

Weather records on 18 August 1949: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mainpuri	India	Record daily precipitation	256.3 mm (10.1 in)	72 of 100 (Major)
Mainpuri	India	Record daily precipitation	256.3 mm (10.1 in)	64 of 100 (Major)
Araria	India	Record daily precipitation	228.9 mm (9.0 in)	56 of 100 (Notable)
Watertown	United States	Record daily precipitation	123.4 mm (4.9 in)	54 of 100 (Notable)
Etawah	India	Record daily precipitation	264.9 mm (10.4 in)	53 of 100 (Notable)
Budaun	India	Record daily precipitation	143.0 mm (5.6 in)	52 of 100 (Notable)
Kaimganj	India	Record daily precipitation	164.6 mm (6.5 in)	52 of 100 (Notable)
Caguas	Puerto Rico [United States]	Record daily precipitation	81.3 mm (3.2 in)	50 of 100 (Notable)
Wolfville	Canada	Record daily precipitation	57.2 mm (2.3 in)	48 of 100 (Notable)
Charlottetown Cda	Canada	Record daily precipitation	42.4 mm (1.7 in)	48 of 100 (Notable)
Odesa	Ukraine	Record daily precipitation	53.5 mm (2.1 in)	48 of 100 (Notable)
Koolau Dam 833	United States	Record daily precipitation	55.9 mm (2.2 in)	48 of 100 (Notable)
Bhikapur	India	Record daily precipitation	177.8 mm (7.0 in)	46 of 100 (Notable)
Chhibramau	India	Record daily precipitation	170.4 mm (6.7 in)	46 of 100 (Notable)
Karhal	India	Record daily precipitation	146.3 mm (5.8 in)	46 of 100 (Notable)
Bharthana	India	Record daily precipitation	205.0 mm (8.1 in)	45 of 100 (Notable)
Raquette Lake	United States	Record daily precipitation	64.5 mm (2.5 in)	44 of 100 (Notable)
Kanpur	India	Record daily precipitation	101.1 mm (4.0 in)	40 of 100 (Notable)
Ulricehamn	Sweden	Record low minimum temperature	1.4 C (34.5 F)	39 of 100 (Notable)
Wood	United States	Record daily precipitation	46.5 mm (1.8 in)	39 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record high minimum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Chambers	United States	Record daily precipitation	68.6 mm (2.7 in)	38 of 100 (Notable)
Bah	India	Record daily precipitation	87.6 mm (3.4 in)	36 of 100 (Notable)
Dataganj	India	Record daily precipitation	85.9 mm (3.4 in)	35 of 100 (Notable)
Indian Lake 2SW	United States	Record daily precipitation	77.0 mm (3.0 in)	35 of 100 (Notable)
Ann Arbor U of Mich	United States	Record daily precipitation	28.4 mm (1.1 in)	34 of 100 (Routine)
Madhubani	India	Record daily precipitation	152.4 mm (6.0 in)	33 of 100 (Routine)
Bilgram	India	Record daily precipitation	90.9 mm (3.6 in)	33 of 100 (Routine)
Kanpur	India	Record daily precipitation	90.4 mm (3.6 in)	33 of 100 (Routine)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	53.3 mm (2.1 in)	33 of 100 (Routine)
Purdum	United States	Record daily precipitation	43.2 mm (1.7 in)	33 of 100 (Routine)
Letchworth Park	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Etah	India	Record daily precipitation	69.6 mm (2.7 in)	32 of 100 (Routine)
Cambridge	United States	Record daily precipitation	30.5 mm (1.2 in)	32 of 100 (Routine)
Montpelier	United States	Record daily precipitation	65.3 mm (2.6 in)	32 of 100 (Routine)
Pertabpur	India	Record daily precipitation	76.2 mm (3.0 in)	31 of 100 (Routine)
Coloso	Puerto Rico [United States]	Record low minimum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Karlstad	Sweden	Record low minimum temperature	2.8 C (37.0 F)	31 of 100 (Routine)
Newport	United States	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Aliganj	India	Record daily precipitation	143.0 mm (5.6 in)	30 of 100 (Routine)
Vasteras-Hasslo	Sweden	Record low maximum temperature	12.3 C (54.1 F)	30 of 100 (Routine)
Tombstone	United States	Record high minimum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Tribune 1W	United States	Record daily precipitation	36.1 mm (1.4 in)	30 of 100 (Routine)
Gospic	Croatia	Record low maximum temperature	14.6 C (58.3 F)	29 of 100 (Routine)
Shikohabad	India	Record daily precipitation	92.2 mm (3.6 in)	29 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low maximum temperature	13.5 C (56.3 F)	29 of 100 (Routine)
Nappan Cda	Canada	Record daily precipitation	33.0 mm (1.3 in)	28 of 100 (Routine)
Falun	Sweden	Record low maximum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Orebro	Sweden	Record low minimum temperature	4.0 C (39.2 F)	28 of 100 (Routine)
Annapolis US Naval Aca	United States	Record daily precipitation	48.0 mm (1.9 in)	28 of 100 (Routine)
Butte	United States	Record daily precipitation	37.1 mm (1.5 in)	28 of 100 (Routine)
Springview 2NW	United States	Record daily precipitation	53.8 mm (2.1 in)	28 of 100 (Routine)
Lake Placid 2 S	United States	Record daily precipitation	34.5 mm (1.4 in)	28 of 100 (Routine)
Gavle	Sweden	Record low maximum temperature	11.6 C (52.9 F)	27 of 100 (Routine)
Freeport	United States	Record daily precipitation	27.9 mm (1.1 in)	27 of 100 (Routine)
Parnu	Estonia	Record low minimum temperature	6.0 C (42.8 F)	26 of 100 (Routine)
Zagreb-Gric	Croatia	Record low maximum temperature	18.1 C (64.6 F)	26 of 100 (Routine)
Hvar	Croatia	Record low minimum temperature	11.0 C (51.8 F)	26 of 100 (Routine)
Bhagaon Bhogaon	India	Record daily precipitation	156.7 mm (6.2 in)	26 of 100 (Routine)
Brewster	United States	Record daily precipitation	40.6 mm (1.6 in)	26 of 100 (Routine)

Counts by Type and Timescale

393 records

Records set or tied on 18 August 1949 by type: Highest daily maximum 14, Lowest daily maximum 38, Highest daily minimum 65, Lowest daily minimum 76, Heaviest daily rainfall 200.

Records on 18 August 1949 by type
Record type	Records
Highest daily maximum	14
Lowest daily maximum	38
Highest daily minimum	65
Lowest daily minimum	76
Heaviest daily rainfall	200
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1949 by timescale: all-time 6, monthly 8, daily 379.

How Much Records Were Beaten By

323 broken records

Margins by which the 323 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 180.6. Ties are not counted.

Top 20 by Significance

18 August 1949

Top 20 records on 18 August 1949 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1949	Mainpuri, IN	all-time rain	256.3 mm (10.1 in)	78.0 mm (3.1 in)	45 years	72 of 100 (Major)
18 August 1949	Mainpuri, IN	all-time rain	256.3 mm (10.1 in)	69.9 mm (2.8 in)	17 years	64 of 100 (Major)
18 August 1949	Araria, IN	daily rain	228.9 mm (9.0 in)	180.6 mm (7.1 in)	43 years	56 of 100 (Notable)
18 August 1949	Watertown, US	all-time rain	123.4 mm (4.9 in)	14.7 mm (0.6 in)	55 years	54 of 100 (Notable)
18 August 1949	Etawah, IN	all-time rain	264.9 mm (10.4 in)	46.5 mm (1.8 in)	25 years	53 of 100 (Notable)
18 August 1949	Budaun, IN	daily rain	143.0 mm (5.6 in)	113.0 mm (4.4 in)	28 years	52 of 100 (Notable)
18 August 1949	Kaimganj, IN	daily rain	164.6 mm (6.5 in)	131.6 mm (5.2 in)	28 years	52 of 100 (Notable)
18 August 1949	Caguas, PR	daily rain	81.3 mm (3.2 in)	45.7 mm (1.8 in)	40 years	50 of 100 (Notable)
18 August 1949	Wolfville, CA	daily rain	57.2 mm (2.3 in)	45.3 mm (1.8 in)	12 years	48 of 100 (Notable)
18 August 1949	Charlottetown Cda, CA	daily rain	42.4 mm (1.7 in)	33.8 mm (1.3 in)	28 years	48 of 100 (Notable)
18 August 1949	Odesa, UA	daily rain	53.5 mm (2.1 in)	34.6 mm (1.4 in)	12 years	48 of 100 (Notable)
18 August 1949	Koolau Dam 833, US	daily rain	55.9 mm (2.2 in)	44.2 mm (1.7 in)	18 years	48 of 100 (Notable)
18 August 1949	Bhikapur, IN	daily rain	177.8 mm (7.0 in)	114.3 mm (4.5 in)	7 years	46 of 100 (Notable)
18 August 1949	Chhibramau, IN	daily rain	170.4 mm (6.7 in)	125.4 mm (4.9 in)	8 years	46 of 100 (Notable)
18 August 1949	Karhal, IN	daily rain	146.3 mm (5.8 in)	79.0 mm (3.1 in)	23 years	46 of 100 (Notable)
18 August 1949	Bharthana, IN	all-time rain	205.0 mm (8.1 in)	38.9 mm (1.5 in)	4 years	45 of 100 (Notable)
18 August 1949	Raquette Lake, US	daily rain	64.5 mm (2.5 in)	36.6 mm (1.4 in)	11 years	44 of 100 (Notable)
18 August 1949	Kanpur, IN	daily rain	101.1 mm (4.0 in)	60.7 mm (2.4 in)	35 years	40 of 100 (Notable)
18 August 1949	Ulricehamn, SE	daily low min	1.4 C (34.5 F)	4.6 C (8.3 F)	55 years	39 of 100 (Notable)
18 August 1949	Wood, US	daily rain	46.5 mm (1.8 in)	34.6 mm (1.4 in)	23 years	39 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

1797 to 1949

Records set or tied on this calendar date in each year from 1797 to 1949. 1949 had 393 records.

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

Records on 08-18 in each year
Year	Records
1797	2
1805	1
1816	1
1827	1
1829	1
1830	1
1833	1
1841	1
1844	1
1845	3
1846	1
1847	1
1849	1
1851	1
1852	1
1853	1
1854	2
1855	1
1856	1
1861	1
1864	2
1866	1
1868	2
1869	1
1870	2
1872	1
1873	1
1875	3
1876	1
1878	1
1879	2
1883	3
1885	3
1886	3
1887	3
1888	2
1889	1
1890	1
1891	2
1892	6
1893	4
1894	4
1895	1
1898	4
1899	6
1900	2
1901	10
1902	8
1903	6
1904	8
1905	10
1906	40
1907	7
1908	21
1909	24
1910	16
1911	11
1912	21
1913	43
1914	37
1915	60
1916	71
1917	70
1918	53
1919	34
1920	51
1921	39
1922	129
1923	90
1924	225
1925	300
1926	168
1927	269
1928	141
1929	181
1930	150
1931	241
1932	382
1933	431
1934	638
1935	424
1936	766
1937	308
1938	243
1939	381
1940	434
1941	467
1942	333
1943	738
1944	325
1945	400
1946	416
1947	958
1948	315
1949	393
1950	683
1951	355
1952	405
1953	323
1954	622
1955	795
1956	580
1957	380
1958	580
1959	537
1960	599
1961	415
1962	428
1963	760
1964	443
1965	525
1966	573
1967	623
1968	795
1969	530
1970	597
1971	381
1972	493
1973	734
1974	639
1975	844
1976	917
1977	1,112
1978	854
1979	1,309
1980	771
1981	1,386
1982	563
1983	1,420
1984	600
1985	765
1986	861
1987	1,609
1988	1,351
1989	952
1990	920
1991	533
1992	1,497
1993	706
1994	1,027
1995	1,882
1996	760
1997	1,191
1998	923
1999	888
2000	1,183
2001	1,036
2002	1,306
2003	860
2004	1,050
2005	865
2006	842
2007	1,116
2008	1,265
2009	839
2010	1,167
2011	1,239
2012	1,247
2013	752
2014	751
2015	880
2016	704
2017	565
2018	462
2019	615
2020	1,541
2021	1,118
2022	1,237
2023	1,094
2024	696
2025	455
2026	545

Download the Data

Data for records on 1949-08-18: 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 25	283
25 to 50	29
50 to 75	4
75 to 100	2
100 to 125	2
125 to 150	2
150 to 175	0
175 to 200	1