Weather Records on 18 August 1946

416 weather records were set or tied worldwide on 18 August 1946. Highest significance: Jacksonville Wb City, US.

Key Facts for 18 August 1946

On 18 August 1946, 416 weather records were set or tied at long-record stations worldwide.
101 were record highs and 102 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 11 monthly and 404 daily.
Jacksonville Wb City set a daily record precipitation of 82.8 mm (3.3 in) on 18 August 1946.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 441 records.

Record Map

416 stations

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

Weather records on 18 August 1946: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jacksonville Wb City	United States	Record daily precipitation	82.8 mm (3.3 in)	58 of 100 (Notable)
Altoona Horseshoe Curv	United States	Record daily precipitation	57.4 mm (2.3 in)	54 of 100 (Notable)
Putten (Gld)	Netherlands	Record daily precipitation	46.4 mm (1.8 in)	50 of 100 (Notable)
Bridgeton 1 NE	United States	Record daily precipitation	99.6 mm (3.9 in)	49 of 100 (Notable)
Portland	Australia	Record daily precipitation	25.7 mm (1.0 in)	46 of 100 (Notable)
Ishpeming	United States	Record daily precipitation	46.5 mm (1.8 in)	43 of 100 (Notable)
G. Udayagiri	India	Record daily precipitation	115.1 mm (4.5 in)	41 of 100 (Notable)
Pasamonte	United States	Record daily precipitation	46.5 mm (1.8 in)	41 of 100 (Notable)
Armagh	United Kingdom	Record low maximum temperature	13.1 C (55.6 F)	40 of 100 (Notable)
Forrest State Forest	Australia	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Grand Meadow	United States	Record daily precipitation	50.8 mm (2.0 in)	38 of 100 (Notable)
Mt Carmel	United States	Record daily precipitation	94.0 mm (3.7 in)	37 of 100 (Notable)
Farrell Sharon	United States	Record daily precipitation	53.3 mm (2.1 in)	37 of 100 (Notable)
1 N McLeansboro	United States	Record daily precipitation	73.4 mm (2.9 in)	36 of 100 (Notable)
De Bilt	Netherlands	Record daily precipitation	34.2 mm (1.3 in)	35 of 100 (Notable)
Abbott 1 SE	United States	Record daily precipitation	57.9 mm (2.3 in)	35 of 100 (Notable)
Roy	United States	Record daily precipitation	34.3 mm (1.4 in)	35 of 100 (Notable)
Ust Tzilma	Russia	Record daily precipitation	37.6 mm (1.5 in)	34 of 100 (Routine)
Chatham 2	Canada	Record daily precipitation	64.8 mm (2.6 in)	33 of 100 (Routine)
Uman	Ukraine	Record high maximum temperature	36.7 C (98.1 F)	33 of 100 (Routine)
Munising	United States	Record daily precipitation	35.6 mm (1.4 in)	33 of 100 (Routine)
Red Rvr	United States	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)
Mt Carmel 4 NW	United States	Record daily precipitation	94.0 mm (3.7 in)	32 of 100 (Routine)
Chapple Vale	Australia	Record daily precipitation	25.1 mm (1.0 in)	31 of 100 (Routine)
North Lake	United States	Record daily precipitation	31.0 mm (1.2 in)	31 of 100 (Routine)
Two Buttes	United States	Record low minimum temperature	6.1 C (43.0 F)	31 of 100 (Routine)
Grenola 1 N	United States	Record daily precipitation	43.7 mm (1.7 in)	31 of 100 (Routine)
Ottapalam	India	Record daily precipitation	88.9 mm (3.5 in)	30 of 100 (Routine)
Palo Verde (1)	United States	Record daily precipitation	30.5 mm (1.2 in)	30 of 100 (Routine)
Saltsburg	United States	Record daily precipitation	39.9 mm (1.6 in)	29 of 100 (Routine)
Nayagarh	India	Record daily precipitation	69.9 mm (2.8 in)	28 of 100 (Routine)
Girona (Antic Institut)	Spain	Record daily precipitation	56.6 mm (2.2 in)	28 of 100 (Routine)
Anna 4 N	United States	Record daily precipitation	46.7 mm (1.8 in)	28 of 100 (Routine)
Schenley Lock 5	United States	Record daily precipitation	51.6 mm (2.0 in)	28 of 100 (Routine)
Mt Clemens Ang Base	United States	Record daily precipitation	37.6 mm (1.5 in)	28 of 100 (Routine)
Steppes (Old Post Office)	Australia	Record daily precipitation	47.2 mm (1.9 in)	27 of 100 (Routine)
Col du Grand St-Bernard	Switzerland	Record daily precipitation	50.0 mm (2.0 in)	27 of 100 (Routine)
University	United States	Record daily precipitation	42.9 mm (1.7 in)	27 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	32.2 C (90.0 F)	27 of 100 (Routine)
Gore Bay	Canada	Record daily precipitation	39.4 mm (1.6 in)	26 of 100 (Routine)
Athens	United States	Record high minimum temperature	23.9 C (75.0 F)	26 of 100 (Routine)
Clarion 3 SW	United States	Record daily precipitation	44.7 mm (1.8 in)	26 of 100 (Routine)
Zagreb-Gric	Croatia	Record high maximum temperature	36.0 C (96.8 F)	25 of 100 (Routine)
Rewari	India	Record daily precipitation	57.7 mm (2.3 in)	25 of 100 (Routine)
Udaipur	India	Record daily precipitation	46.2 mm (1.8 in)	25 of 100 (Routine)
Sheffield	United Kingdom	Record low minimum temperature	7.8 C (46.0 F)	25 of 100 (Routine)
Poltava	Ukraine	Record high maximum temperature	36.3 C (97.3 F)	25 of 100 (Routine)
Newport	United States	Record high minimum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Olean	United States	Record daily precipitation	26.9 mm (1.1 in)	25 of 100 (Routine)
Charleston 1	United States	Record daily precipitation	37.6 mm (1.5 in)	25 of 100 (Routine)
Otto FAA AP	United States	Record daily precipitation	32.8 mm (1.3 in)	25 of 100 (Routine)
Pecs Pogany	Hungary	Record high maximum temperature	39.2 C (102.6 F)	24 of 100 (Routine)
Manantoddy	India	Record daily precipitation	112.3 mm (4.4 in)	24 of 100 (Routine)
Boras	Sweden	Record daily precipitation	25.7 mm (1.0 in)	24 of 100 (Routine)
Hull	United Kingdom	Record low minimum temperature	6.7 C (44.1 F)	24 of 100 (Routine)
Pratt 3NW	United States	Record daily precipitation	32.8 mm (1.3 in)	24 of 100 (Routine)
Frankfort Downtown	United States	Record daily precipitation	42.9 mm (1.7 in)	24 of 100 (Routine)
Henderson 8 SSW	United States	Record daily precipitation	46.2 mm (1.8 in)	24 of 100 (Routine)
Towson	United States	Record daily precipitation	68.6 mm (2.7 in)	24 of 100 (Routine)
Claude	United States	Record daily precipitation	30.2 mm (1.2 in)	24 of 100 (Routine)

Counts by Type and Timescale

416 records

Records set or tied on 18 August 1946 by type: Highest daily maximum 49, Lowest daily maximum 24, Highest daily minimum 52, Lowest daily minimum 78, Heaviest daily rainfall 213.

Records on 18 August 1946 by type
Record type	Records
Highest daily maximum	49
Lowest daily maximum	24
Highest daily minimum	52
Lowest daily minimum	78
Heaviest daily rainfall	213
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 1946 by timescale: all-time 1, monthly 11, daily 404.

How Much Records Were Beaten By

348 broken records

Margins by which the 348 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.4. Ties are not counted.

Top 20 by Significance

18 August 1946

Top 20 records on 18 August 1946 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 1946	Jacksonville Wb City, US	daily rain	82.8 mm (3.3 in)	55.4 mm (2.2 in)	51 years	58 of 100 (Notable)
18 August 1946	Altoona Horseshoe Curv, US	daily rain	57.4 mm (2.3 in)	41.9 mm (1.6 in)	44 years	54 of 100 (Notable)
18 August 1946	Putten (Gld), NL	daily rain	46.4 mm (1.8 in)	24.4 mm (1.0 in)	21 years	50 of 100 (Notable)
18 August 1946	Bridgeton 1 NE, US	daily rain	99.6 mm (3.9 in)	67.8 mm (2.7 in)	19 years	49 of 100 (Notable)
18 August 1946	Portland, AU	daily rain	25.7 mm (1.0 in)	10.2 mm (0.4 in)	71 years	46 of 100 (Notable)
18 August 1946	Ishpeming, US	daily rain	46.5 mm (1.8 in)	24.9 mm (1.0 in)	44 years	43 of 100 (Notable)
18 August 1946	G. Udayagiri, IN	daily rain	115.1 mm (4.5 in)	70.4 mm (2.8 in)	17 years	41 of 100 (Notable)
18 August 1946	Pasamonte, US	daily rain	46.5 mm (1.8 in)	34.8 mm (1.4 in)	19 years	41 of 100 (Notable)
18 August 1946	Armagh, GB	daily low max	13.1 C (55.6 F)	1.1 C (2.0 F)	89 years	40 of 100 (Notable)
18 August 1946	Forrest State Forest, AU	daily rain	30.0 mm (1.2 in)	16.0 mm (0.6 in)	45 years	38 of 100 (Notable)
18 August 1946	Grand Meadow, US	daily rain	50.8 mm (2.0 in)	39.6 mm (1.6 in)	32 years	38 of 100 (Notable)
18 August 1946	Mt Carmel, US	monthly rain	94.0 mm (3.7 in)	18.3 mm (0.7 in)	26 years	37 of 100 (Notable)
18 August 1946	Farrell Sharon, US	daily rain	53.3 mm (2.1 in)	39.1 mm (1.5 in)	24 years	37 of 100 (Notable)
18 August 1946	1 N McLeansboro, US	daily rain	73.4 mm (2.9 in)	37.1 mm (1.5 in)	17 years	36 of 100 (Notable)
18 August 1946	De Bilt, NL	daily rain	34.2 mm (1.3 in)	16.4 mm (0.6 in)	21 years	35 of 100 (Notable)
18 August 1946	Abbott 1 SE, US	daily rain	57.9 mm (2.3 in)	34.0 mm (1.3 in)	3 years	35 of 100 (Notable)
18 August 1946	Roy, US	daily rain	34.3 mm (1.4 in)	19.1 mm (0.8 in)	23 years	35 of 100 (Notable)
18 August 1946	Ust Tzilma, RU	daily rain	37.6 mm (1.5 in)	14.0 mm (0.6 in)	11 years	34 of 100 (Routine)
18 August 1946	Chatham 2, CA	daily rain	64.8 mm (2.6 in)	30.5 mm (1.2 in)	5 years	33 of 100 (Routine)
18 August 1946	Uman, UA	monthly high max	36.7 C (98.1 F)	0.8 C (1.4 F)	55 years	33 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

1797 to 1946

Records set or tied on this calendar date in each year from 1797 to 1946. 1946 had 416 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 1946-08-18: 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 10	278
10 to 20	43
20 to 30	15
30 to 40	7
40 to 50	2
50 to 60	1
60 to 70	1
70 to 80	1