Weather Records on 20 August 2018

657 weather records were set or tied worldwide on 20 August 2018. Highest significance: Atlantic 1 NE, US.

Key Facts for 20 August 2018

On 20 August 2018, 657 weather records were set or tied at long-record stations worldwide.
265 were record highs and 205 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 643 daily.
Atlantic 1 NE set a daily record precipitation of 105.4 mm (4.1 in) on 20 August 2018.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 454 records.

Record Map

657 stations

657 station records on 20 August 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Atlantic 1 NE	United States	Record daily precipitation	105.4 mm (4.1 in)	74 of 100 (Major)
Oakland	United States	Record daily precipitation	164.1 mm (6.5 in)	70 of 100 (Major)
Corning	United States	Record daily precipitation	108.5 mm (4.3 in)	69 of 100 (Major)
Omaha Eppley Airfield	United States	Record daily precipitation	156.7 mm (6.2 in)	61 of 100 (Major)
Sarh	Chad	Record low minimum temperature	16.0 C (60.8 F)	60 of 100 (Major)
Hillsborough Rvr Sp	United States	Record daily precipitation	90.9 mm (3.6 in)	57 of 100 (Notable)
Logan 1 WNW	United States	Record daily precipitation	180.3 mm (7.1 in)	56 of 100 (Notable)
Trenton Falls	United States	Record daily precipitation	56.6 mm (2.2 in)	54 of 100 (Notable)
Denison	United States	Record daily precipitation	68.3 mm (2.7 in)	53 of 100 (Notable)
Albany	United States	Record daily precipitation	94.0 mm (3.7 in)	53 of 100 (Notable)
Raleigh State UNIV	United States	Record daily precipitation	114.3 mm (4.5 in)	53 of 100 (Notable)
Kairouan	Tunisia	Record daily precipitation	32.0 mm (1.3 in)	51 of 100 (Notable)
Clinton	United States	Record daily precipitation	125.2 mm (4.9 in)	51 of 100 (Notable)
Lamoni	United States	Record daily precipitation	88.9 mm (3.5 in)	51 of 100 (Notable)
Audubon	United States	Record daily precipitation	78.7 mm (3.1 in)	50 of 100 (Notable)
Beaconsfield 3N	United States	Record daily precipitation	80.3 mm (3.2 in)	50 of 100 (Notable)
Massena	United States	Record daily precipitation	98.6 mm (3.9 in)	50 of 100 (Notable)
Adel	United States	Record low maximum temperature	11.7 C (53.1 F)	50 of 100 (Notable)
Clermont 9 S	United States	Record daily precipitation	85.9 mm (3.4 in)	49 of 100 (Notable)
Mapleton No.2	United States	Record daily precipitation	59.4 mm (2.3 in)	48 of 100 (Notable)
Alexandra (Post Office)	Australia	Record daily precipitation	25.6 mm (1.0 in)	47 of 100 (Notable)
Onamia Rs	United States	Record daily precipitation	94.2 mm (3.7 in)	47 of 100 (Notable)
David City 4E	United States	Record daily precipitation	50.3 mm (2.0 in)	47 of 100 (Notable)
Wiggins	United States	Record daily precipitation	78.7 mm (3.1 in)	46 of 100 (Notable)
Marion	United States	Record daily precipitation	55.1 mm (2.2 in)	46 of 100 (Notable)
Chatom	United States	Record daily precipitation	101.6 mm (4.0 in)	44 of 100 (Notable)
Fairhope 2 NE	United States	Record low maximum temperature	26.1 C (79.0 F)	44 of 100 (Notable)
Laghouat	Algeria	Record low maximum temperature	30.3 C (86.5 F)	43 of 100 (Notable)
Point Hicks (Lighthouse)	Australia	Record daily precipitation	34.0 mm (1.3 in)	43 of 100 (Notable)
Linjiang	China	Record daily precipitation	95.8 mm (3.8 in)	43 of 100 (Notable)
Asheville AP	United States	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Cape Leeuwin	Australia	Record high maximum temperature	22.1 C (71.8 F)	42 of 100 (Notable)
Ossora	Russia	Record daily precipitation	41.0 mm (1.6 in)	42 of 100 (Notable)
Julesburg	United States	Record low maximum temperature	20.0 C (68.0 F)	42 of 100 (Notable)
Red Oak	United States	Record daily precipitation	87.4 mm (3.4 in)	42 of 100 (Notable)
Hachita 1W	United States	Record high minimum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Mecca Fire STN	United States	Record high minimum temperature	31.7 C (89.1 F)	41 of 100 (Notable)
Ottawa	United States	Record low maximum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Concordia ASOS	United States	Record low maximum temperature	22.8 C (73.0 F)	41 of 100 (Notable)
Montevideo 1SW	United States	Record daily precipitation	58.4 mm (2.3 in)	40 of 100 (Notable)
Quartzsite	United States	Record high minimum temperature	31.7 C (89.1 F)	39 of 100 (Notable)
Brookville	United States	Record daily precipitation	57.4 mm (2.3 in)	39 of 100 (Notable)
Fremont	United States	Record daily precipitation	67.1 mm (2.6 in)	39 of 100 (Notable)
W Pt	United States	Record daily precipitation	69.3 mm (2.7 in)	39 of 100 (Notable)
Longview	United States	Record high minimum temperature	26.1 C (79.0 F)	39 of 100 (Notable)
Poltavka	Russia	Record daily precipitation	32.0 mm (1.3 in)	38 of 100 (Notable)
Dumas	United States	Record daily precipitation	71.4 mm (2.8 in)	38 of 100 (Notable)
Bedford	United States	Record daily precipitation	94.0 mm (3.7 in)	38 of 100 (Notable)
Lyons	United States	Record daily precipitation	61.0 mm (2.4 in)	38 of 100 (Notable)
Syracuse	United States	Record daily precipitation	47.2 mm (1.9 in)	38 of 100 (Notable)
Erica	Australia	Record daily precipitation	31.0 mm (1.2 in)	37 of 100 (Notable)
Pointe Noire	Congo (Brazzaville)	Record high maximum temperature	28.9 C (84.0 F)	37 of 100 (Notable)
Minden	United States	Record high minimum temperature	26.1 C (79.0 F)	37 of 100 (Notable)
Bruning	United States	Record daily precipitation	51.3 mm (2.0 in)	37 of 100 (Notable)
Botkinburg 3 NE	United States	Record daily precipitation	78.0 mm (3.1 in)	36 of 100 (Notable)
Long Pool	United States	Record daily precipitation	134.4 mm (5.3 in)	36 of 100 (Notable)
Emmetsburg	United States	Record daily precipitation	37.3 mm (1.5 in)	36 of 100 (Notable)
Isle 12N	United States	Record daily precipitation	70.1 mm (2.8 in)	36 of 100 (Notable)
Graham 2 ENE	United States	Record daily precipitation	55.4 mm (2.2 in)	36 of 100 (Notable)
Ketchikan AP	United States	Record high minimum temperature	15.6 C (60.1 F)	36 of 100 (Notable)

Counts by Type and Timescale

657 records

Records set or tied on 20 August 2018 by type: Highest daily maximum 79, Lowest daily maximum 120, Highest daily minimum 186, Lowest daily minimum 85, Heaviest daily rainfall 187.

Records on 20 August 2018 by type
Record type	Records
Highest daily maximum	79
Lowest daily maximum	120
Highest daily minimum	186
Lowest daily minimum	85
Heaviest daily rainfall	187
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 2018 by timescale: all-time 1, monthly 13, daily 643.

How Much Records Were Beaten By

507 broken records

Margins by which the 507 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 112.0. Ties are not counted.

Top 20 by Significance

20 August 2018

Top 20 records on 20 August 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 2018	Atlantic 1 NE, US	daily rain	105.4 mm (4.1 in)	55.9 mm (2.2 in)	97 years	74 of 100 (Major)
20 August 2018	Oakland, US	daily rain	164.1 mm (6.5 in)	112.0 mm (4.4 in)	67 years	70 of 100 (Major)
20 August 2018	Corning, US	daily rain	108.5 mm (4.3 in)	60.0 mm (2.4 in)	80 years	69 of 100 (Major)
20 August 2018	Omaha Eppley Airfield, US	daily rain	156.7 mm (6.2 in)	106.4 mm (4.2 in)	48 years	61 of 100 (Major)
20 August 2018	Sarh, TD	daily low min	16.0 C (60.8 F)	3.9 C (7.0 F)	56 years	60 of 100 (Major)
20 August 2018	Hillsborough Rvr Sp, US	daily rain	90.9 mm (3.6 in)	53.8 mm (2.1 in)	68 years	57 of 100 (Notable)
20 August 2018	Logan 1 WNW, US	all-time rain	180.3 mm (7.1 in)	32.2 mm (1.3 in)	19 years	56 of 100 (Notable)
20 August 2018	Trenton Falls, US	daily rain	56.6 mm (2.2 in)	43.9 mm (1.7 in)	28 years	54 of 100 (Notable)
20 August 2018	Denison, US	daily rain	68.3 mm (2.7 in)	40.1 mm (1.6 in)	60 years	53 of 100 (Notable)
20 August 2018	Albany, US	daily rain	94.0 mm (3.7 in)	25.9 mm (1.0 in)	92 years	53 of 100 (Notable)
20 August 2018	Raleigh State UNIV, US	daily rain	114.3 mm (4.5 in)	31.0 mm (1.2 in)	83 years	53 of 100 (Notable)
20 August 2018	Kairouan, TN	daily rain	32.0 mm (1.3 in)	29.0 mm (1.1 in)	29 years	51 of 100 (Notable)
20 August 2018	Clinton, US	daily rain	125.2 mm (4.9 in)	87.1 mm (3.4 in)	9 years	51 of 100 (Notable)
20 August 2018	Lamoni, US	daily rain	88.9 mm (3.5 in)	45.7 mm (1.8 in)	48 years	51 of 100 (Notable)
20 August 2018	Audubon, US	daily rain	78.7 mm (3.1 in)	33.0 mm (1.3 in)	67 years	50 of 100 (Notable)
20 August 2018	Beaconsfield 3N, US	daily rain	80.3 mm (3.2 in)	44.5 mm (1.8 in)	67 years	50 of 100 (Notable)
20 August 2018	Massena, US	daily rain	98.6 mm (3.9 in)	79.5 mm (3.1 in)	21 years	50 of 100 (Notable)
20 August 2018	Adel, US	daily low max	11.7 C (53.1 F)	5.0 C (9.0 F)	113 years	50 of 100 (Notable)
20 August 2018	Clermont 9 S, US	daily rain	85.9 mm (3.4 in)	55.7 mm (2.2 in)	25 years	49 of 100 (Notable)
20 August 2018	Mapleton No.2, US	daily rain	59.4 mm (2.3 in)	29.7 mm (1.2 in)	67 years	48 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 2018

Records set or tied on this calendar date in each year from 1797 to 2018. 2018 had 657 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 2018-08-20: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	459
20 to 40	29
40 to 60	13
60 to 80	3
80 to 100	1
100 to 120	2