Weather Records on 18 August 2023

1,094 weather records were set or tied worldwide on 18 August 2023. Highest significance: Thermopolis, US.

Key Facts for 18 August 2023

On 18 August 2023, 1,094 weather records were set or tied at long-record stations worldwide.
892 were record highs and 36 were record lows, counting maximum and minimum temperature.
By timescale, 10 were all-time records, 42 monthly and 1,042 daily.
Thermopolis set an all-time record high minimum temperature of 25.0 C (77.0 F) on 18 August 2023.
Across 171 earlier years (1797 to 2026) the same calendar date averaged 437 records.

Record Map

1,094 stations

1,094 station records on 18 August 2023 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2023: highest significance records shown on the map
Station	Country	Type	Value	Significance
Thermopolis	United States	Record high minimum temperature	25.0 C (77.0 F)	61 of 100 (Major)
Longerenong	Australia	Record daily precipitation	25.2 mm (1.0 in)	58 of 100 (Notable)
Red Lodge	United States	Record high minimum temperature	21.7 C (71.1 F)	51 of 100 (Notable)
Wellington 3 E	United States	Record daily precipitation	26.7 mm (1.1 in)	51 of 100 (Notable)
Boerne	United States	Record high maximum temperature	42.2 C (108.0 F)	48 of 100 (Notable)
Cuero	United States	Record high maximum temperature	44.4 C (111.9 F)	48 of 100 (Notable)
Norris Madison Pwr House	United States	Record high minimum temperature	21.7 C (71.1 F)	47 of 100 (Notable)
Orleans	United States	Record high minimum temperature	18.9 C (66.0 F)	45 of 100 (Notable)
Wisdom	United States	Record high minimum temperature	14.4 C (57.9 F)	45 of 100 (Notable)
Hillsboro	United States	Record high maximum temperature	43.3 C (109.9 F)	45 of 100 (Notable)
Big Rapids Wtp	United States	Record daily precipitation	31.5 mm (1.2 in)	44 of 100 (Notable)
Bowie	United States	Record high maximum temperature	43.3 C (109.9 F)	44 of 100 (Notable)
Green Rvr	United States	Record high minimum temperature	16.1 C (61.0 F)	44 of 100 (Notable)
Ballinger 2 NW	United States	Record high maximum temperature	43.3 C (109.9 F)	43 of 100 (Notable)
Coleman	United States	Record high maximum temperature	42.8 C (109.0 F)	43 of 100 (Notable)
Gibson Dam	United States	Record high minimum temperature	12.8 C (55.0 F)	42 of 100 (Notable)
Brownwood 2NE	United States	Record high minimum temperature	26.1 C (79.0 F)	42 of 100 (Notable)
Plainview	United States	Record high maximum temperature	40.0 C (104.0 F)	42 of 100 (Notable)
Spur	United States	Record high maximum temperature	42.2 C (108.0 F)	42 of 100 (Notable)
Scottsbluff W B Heilig Fld AP	United States	Record high maximum temperature	38.9 C (102.0 F)	42 of 100 (Notable)
Hobart Muni AP	United States	Record high maximum temperature	42.8 C (109.0 F)	42 of 100 (Notable)
Poitiers - Biard	France	Record high minimum temperature	20.7 C (69.3 F)	41 of 100 (Notable)
Schwerin	Germany	Record high maximum temperature	29.7 C (85.5 F)	41 of 100 (Notable)
San Sebastian - Igueldo	Spain	Record high maximum temperature	31.6 C (88.9 F)	41 of 100 (Notable)
Brownwood 2NE	United States	Record high maximum temperature	42.8 C (109.0 F)	41 of 100 (Notable)
Cleburne	United States	Record high maximum temperature	42.2 C (108.0 F)	41 of 100 (Notable)
Junction 4SSW	United States	Record high maximum temperature	41.1 C (106.0 F)	41 of 100 (Notable)
Ibapah	United States	Record high minimum temperature	17.2 C (63.0 F)	41 of 100 (Notable)
Randolph	United States	Record high minimum temperature	12.8 C (55.0 F)	41 of 100 (Notable)
Semjachik	Russia	Record daily precipitation	55.1 mm (2.2 in)	40 of 100 (Notable)
Goldbutte 7 N	United States	Record high maximum temperature	36.1 C (97.0 F)	40 of 100 (Notable)
Haskell	United States	Record high maximum temperature	42.8 C (109.0 F)	40 of 100 (Notable)
Bowmans Creek (Grenell)	Australia	Record daily precipitation	52.0 mm (2.0 in)	39 of 100 (Notable)
Beijing	China	Record high maximum temperature	37.0 C (98.6 F)	39 of 100 (Notable)
Bilbao Aeropuerto	Spain	Record high maximum temperature	38.7 C (101.7 F)	39 of 100 (Notable)
Downsville Dam	United States	Record daily precipitation	50.8 mm (2.0 in)	39 of 100 (Notable)
Cottage Grove 2E	United States	Record high minimum temperature	18.9 C (66.0 F)	39 of 100 (Notable)
Wallowa	United States	Record high minimum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Stephenville Clark Fld	United States	Record high maximum temperature	42.8 C (109.0 F)	39 of 100 (Notable)
Skq Dam	United States	Record high minimum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Wisley	United Kingdom	Record high minimum temperature	17.6 C (63.7 F)	37 of 100 (Notable)
Hebgen Dam	United States	Record high minimum temperature	13.3 C (55.9 F)	37 of 100 (Notable)
Carson City	United States	Record high minimum temperature	20.0 C (68.0 F)	37 of 100 (Notable)
Susquehanna	United States	Record daily precipitation	70.6 mm (2.8 in)	37 of 100 (Notable)
Truscott 3 W	United States	Record high maximum temperature	45.6 C (114.1 F)	37 of 100 (Notable)
Afton	United States	Record daily precipitation	30.5 mm (1.2 in)	37 of 100 (Notable)
Pathfinder Dam	United States	Record high minimum temperature	21.1 C (70.0 F)	37 of 100 (Notable)
Monroe Rgnl AP	United States	Record high maximum temperature	40.6 C (105.1 F)	37 of 100 (Notable)
Puri	India	Record daily precipitation	70.1 mm (2.8 in)	36 of 100 (Notable)
Apalachicola AP	United States	Record high maximum temperature	36.1 C (97.0 F)	36 of 100 (Notable)
Massacre Rocks Sp	United States	Record high minimum temperature	24.4 C (75.9 F)	36 of 100 (Notable)
Ekalaka	United States	Record high minimum temperature	21.1 C (70.0 F)	36 of 100 (Notable)
Breckenridge	United States	Record high maximum temperature	42.2 C (108.0 F)	36 of 100 (Notable)
Kingsville	United States	Record high maximum temperature	40.6 C (105.1 F)	36 of 100 (Notable)
Leo 6 SW	United States	Record high minimum temperature	18.9 C (66.0 F)	36 of 100 (Notable)
Mineral Wells AP	United States	Record high maximum temperature	44.4 C (111.9 F)	36 of 100 (Notable)
Ben Lomond (Koala)	Australia	Record daily precipitation	44.6 mm (1.8 in)	35 of 100 (Notable)
Nueva Casas Grandes	Mexico	Record high maximum temperature	38.8 C (101.8 F)	35 of 100 (Notable)
Pontevedra	Spain	Record daily precipitation	47.4 mm (1.9 in)	35 of 100 (Notable)
Waterville Trtmt Plt	United States	Record daily precipitation	33.0 mm (1.3 in)	35 of 100 (Notable)

Counts by Type and Timescale

1,094 records

Records set or tied on 18 August 2023 by type: Highest daily maximum 392, Lowest daily maximum 15, Highest daily minimum 500, Lowest daily minimum 21, Heaviest daily rainfall 166.

Records on 18 August 2023 by type
Record type	Records
Highest daily maximum	392
Lowest daily maximum	15
Highest daily minimum	500
Lowest daily minimum	21
Heaviest daily rainfall	166
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2023 by timescale: all-time 10, monthly 42, daily 1,042.

How Much Records Were Beaten By

844 broken records

Margins by which the 844 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 43.5. Ties are not counted.

Top 20 by Significance

18 August 2023

Top 20 records on 18 August 2023 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2023	Thermopolis, US	all-time high min	25.0 C (77.0 F)	0.6 C (1.1 F)	123 years	61 of 100 (Major)
18 August 2023	Longerenong, AU	daily rain	25.2 mm (1.0 in)	15.4 mm (0.6 in)	38 years	58 of 100 (Notable)
18 August 2023	Red Lodge, US	monthly high min	21.7 C (71.1 F)	0.6 C (1.1 F)	129 years	51 of 100 (Notable)
18 August 2023	Wellington 3 E, US	daily rain	26.7 mm (1.1 in)	19.3 mm (0.8 in)	38 years	51 of 100 (Notable)
18 August 2023	Boerne, US	daily high max	42.2 C (108.0 F)	2.2 C (4.0 F)	113 years	48 of 100 (Notable)
18 August 2023	Cuero, US	daily high max	44.4 C (111.9 F)	2.2 C (4.0 F)	113 years	48 of 100 (Notable)
18 August 2023	Norris Madison Pwr House, US	daily high min	21.7 C (71.1 F)	2.3 C (4.1 F)	104 years	47 of 100 (Notable)
18 August 2023	Orleans, US	daily high min	18.9 C (66.0 F)	1.7 C (3.1 F)	96 years	45 of 100 (Notable)
18 August 2023	Wisdom, US	monthly high min	14.4 C (57.9 F)	1.1 C (2.0 F)	75 years	45 of 100 (Notable)
18 August 2023	Hillsboro, US	daily high max	43.3 C (109.9 F)	1.6 C (2.9 F)	104 years	45 of 100 (Notable)
18 August 2023	Big Rapids Wtp, US	daily rain	31.5 mm (1.2 in)	6.1 mm (0.24 in)	108 years	44 of 100 (Notable)
18 August 2023	Bowie, US	daily high max	43.3 C (109.9 F)	1.6 C (2.9 F)	104 years	44 of 100 (Notable)
18 August 2023	Green Rvr, US	daily high min	16.1 C (61.0 F)	1.7 C (3.1 F)	100 years	44 of 100 (Notable)
18 August 2023	Ballinger 2 NW, US	daily high max	43.3 C (109.9 F)	1.1 C (2.0 F)	113 years	43 of 100 (Notable)
18 August 2023	Coleman, US	daily high max	42.8 C (109.0 F)	1.1 C (2.0 F)	104 years	43 of 100 (Notable)
18 August 2023	Gibson Dam, US	daily high min	12.8 C (55.0 F)	0.6 C (1.1 F)	108 years	42 of 100 (Notable)
18 August 2023	Brownwood 2NE, US	daily high min	26.1 C (79.0 F)	0.5 C (0.9 F)	123 years	42 of 100 (Notable)
18 August 2023	Plainview, US	daily high max	40.0 C (104.0 F)	1.1 C (2.0 F)	98 years	42 of 100 (Notable)
18 August 2023	Spur, US	daily high max	42.2 C (108.0 F)	1.1 C (2.0 F)	98 years	42 of 100 (Notable)
18 August 2023	Scottsbluff W B Heilig Fld AP, US	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	101 years	42 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 2023

Records set or tied on this calendar date in each year from 1797 to 2023. 2023 had 1,094 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 2023-08-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	819
10 to 20	18
20 to 30	6
30 to 40	0
40 to 50	1