Weather Records on 18 August 2026

545 weather records were set or tied worldwide on 18 August 2026. Highest significance: Arkaroola, AU.

Key Facts for 18 August 2026

On 18 August 2026, 545 weather records were set or tied at long-record stations worldwide.
429 were record highs and 33 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 14 monthly and 529 daily.
Arkaroola set a daily record precipitation of 30.8 mm (1.2 in) on 18 August 2026.
Across 171 earlier years (1797 to 2025) the same calendar date averaged 440 records.

Record Map

545 stations

545 station records on 18 August 2026 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 August 2026: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arkaroola	Australia	Record daily precipitation	30.8 mm (1.2 in)	69 of 100 (Major)
Cockburn (Tepco)	Australia	Record daily precipitation	32.3 mm (1.3 in)	63 of 100 (Major)
N Loup	United States	Record daily precipitation	111.8 mm (4.4 in)	62 of 100 (Major)
Saltillo	Mexico	Record high minimum temperature	26.5 C (79.7 F)	60 of 100 (Major)
Chilpancingo Ro.	Mexico	Record daily precipitation	115.7 mm (4.6 in)	55 of 100 (Notable)
Miami Intl AP	United States	Record high maximum temperature	37.8 C (100.0 F)	55 of 100 (Notable)
Greeley	United States	Record daily precipitation	64.0 mm (2.5 in)	52 of 100 (Notable)
Hakodate	Japan	Record daily precipitation	178.5 mm (7.0 in)	49 of 100 (Notable)
Tampico Tamps	Mexico	Record low minimum temperature	18.4 C (65.1 F)	49 of 100 (Notable)
Waynesboro 2 W	United States	Record high maximum temperature	40.6 C (105.1 F)	49 of 100 (Notable)
Plant City	United States	Record high minimum temperature	26.7 C (80.1 F)	48 of 100 (Notable)
Rucava	Latvia	Record daily precipitation	73.7 mm (2.9 in)	47 of 100 (Notable)
Zoseni	Latvia	Record daily precipitation	54.4 mm (2.1 in)	46 of 100 (Notable)
Lake Charles Chenault	United States	Record high minimum temperature	26.0 C (78.8 F)	46 of 100 (Notable)
Glen St Mary 1 W	United States	Record high minimum temperature	25.0 C (77.0 F)	45 of 100 (Notable)
Quicksand	United States	Record high minimum temperature	22.2 C (72.0 F)	45 of 100 (Notable)
Canton 4N	United States	Record high minimum temperature	25.6 C (78.1 F)	45 of 100 (Notable)
Moose	United States	Record daily precipitation	38.1 mm (1.5 in)	45 of 100 (Notable)
Mt Pleasant	United States	Record high maximum temperature	43.9 C (111.0 F)	44 of 100 (Notable)
Lumberton	United States	Record high maximum temperature	38.9 C (102.0 F)	43 of 100 (Notable)
Orlando Executive AP	United States	Record high minimum temperature	27.2 C (81.0 F)	43 of 100 (Notable)
Adelaide West Terrace	Australia	Record high minimum temperature	13.7 C (56.7 F)	42 of 100 (Notable)
Casa Grande Nm	United States	Record high maximum temperature	45.0 C (113.0 F)	42 of 100 (Notable)
Brunswick	United States	Record high maximum temperature	37.8 C (100.0 F)	42 of 100 (Notable)
Birni N'Konni	Niger	Record high minimum temperature	26.7 C (80.1 F)	41 of 100 (Notable)
Toccoa	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Greeneville Exp STN	United States	Record high minimum temperature	22.2 C (72.0 F)	41 of 100 (Notable)
Laketown	United States	Record high minimum temperature	16.1 C (61.0 F)	41 of 100 (Notable)
McAlester Rgnl AP	United States	Record high maximum temperature	42.8 C (109.0 F)	41 of 100 (Notable)
Mexico City	Mexico	Record daily precipitation	54.7 mm (2.2 in)	39 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	85.1 mm (3.4 in)	39 of 100 (Notable)
Marseilles-Marignane	France	Record high maximum temperature	36.6 C (97.9 F)	38 of 100 (Notable)
Ord #2	United States	Record daily precipitation	56.6 mm (2.2 in)	38 of 100 (Notable)
Zamora	Mexico	Record daily precipitation	55.2 mm (2.2 in)	37 of 100 (Notable)
Zamora	Spain	Record high maximum temperature	38.8 C (101.8 F)	37 of 100 (Notable)
Rocky Mt 8 ESE	United States	Record daily precipitation	83.8 mm (3.3 in)	37 of 100 (Notable)
Abashiri	Japan	Record daily precipitation	76.0 mm (3.0 in)	36 of 100 (Notable)
Portland	United States	Record high minimum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Hialeah	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Elizabethtown	United States	Record high maximum temperature	40.0 C (104.0 F)	36 of 100 (Notable)
Oklahoma Cy Will Rogers World	United States	Record high maximum temperature	42.8 C (109.0 F)	36 of 100 (Notable)
Baton Rouge Metro AP	United States	Record high minimum temperature	26.1 C (79.0 F)	36 of 100 (Notable)
Stuart	United States	Record high maximum temperature	36.7 C (98.1 F)	35 of 100 (Notable)
Ft Smith Rgnl AP	United States	Record high maximum temperature	42.8 C (109.0 F)	35 of 100 (Notable)
Saga	Japan	Record high minimum temperature	28.9 C (84.0 F)	34 of 100 (Routine)
Cet Central England	United Kingdom	Record high minimum temperature	16.6 C (61.9 F)	34 of 100 (Routine)
Greensboro	United States	Record high maximum temperature	40.6 C (105.1 F)	34 of 100 (Routine)
Clermont 9 S	United States	Record high maximum temperature	37.8 C (100.0 F)	34 of 100 (Routine)
Winnsboro 5 SSE	United States	Record high maximum temperature	40.0 C (104.0 F)	34 of 100 (Routine)
Roxboro 7 ESE	United States	Record high minimum temperature	24.4 C (75.9 F)	34 of 100 (Routine)
Monterey	United States	Record high maximum temperature	33.9 C (93.0 F)	34 of 100 (Routine)
Marseilles-Marignane	France	Record high minimum temperature	25.3 C (77.5 F)	33 of 100 (Routine)
Jalapa Ver.	Mexico	Record daily precipitation	70.0 mm (2.8 in)	33 of 100 (Routine)
Kanchanaburi	Thailand	Record high minimum temperature	27.2 C (81.0 F)	33 of 100 (Routine)
Alderson	United States	Record high minimum temperature	21.1 C (70.0 F)	33 of 100 (Routine)
Karats	Sweden	Record daily precipitation	26.3 mm (1.0 in)	32 of 100 (Routine)
Wiggins	United States	Record high maximum temperature	38.3 C (100.9 F)	32 of 100 (Routine)
Transou	United States	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Fayetteville Drake Fld	United States	Record high maximum temperature	40.0 C (104.0 F)	32 of 100 (Routine)
Iizuka	Japan	Record high minimum temperature	26.9 C (80.4 F)	31 of 100 (Routine)

Counts by Type and Timescale

545 records

Records set or tied on 18 August 2026 by type: Highest daily maximum 146, Lowest daily maximum 14, Highest daily minimum 283, Lowest daily minimum 19, Heaviest daily rainfall 83.

Records on 18 August 2026 by type
Record type	Records
Highest daily maximum	146
Lowest daily maximum	14
Highest daily minimum	283
Lowest daily minimum	19
Heaviest daily rainfall	83
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 18 August 2026 by timescale: all-time 2, monthly 14, daily 529.

How Much Records Were Beaten By

390 broken records

Margins by which the 390 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.0. Ties are not counted.

Top 20 by Significance

18 August 2026

Top 20 records on 18 August 2026 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 August 2026	Arkaroola, AU	daily rain	30.8 mm (1.2 in)	24.7 mm (1.0 in)	75 years	69 of 100 (Major)
18 August 2026	Cockburn (Tepco), AU	daily rain	32.3 mm (1.3 in)	23.3 mm (0.9 in)	47 years	63 of 100 (Major)
18 August 2026	N Loup, US	daily rain	111.8 mm (4.4 in)	61.0 mm (2.4 in)	40 years	62 of 100 (Major)
18 August 2026	Saltillo, MX	daily high min	26.5 C (79.7 F)	7.0 C (12.6 F)	56 years	60 of 100 (Major)
18 August 2026	Chilpancingo Ro., MX	monthly rain	115.7 mm (4.6 in)	29.6 mm (1.2 in)	23 years	55 of 100 (Notable)
18 August 2026	Miami Intl AP, US	all-time high max	37.8 C (100.0 F)	1.1 C (2.0 F)	72 years	55 of 100 (Notable)
18 August 2026	Greeley, US	daily rain	64.0 mm (2.5 in)	39.1 mm (1.5 in)	51 years	52 of 100 (Notable)
18 August 2026	Hakodate, JP	daily rain	178.5 mm (7.0 in)	42.3 mm (1.7 in)	68 years	49 of 100 (Notable)
18 August 2026	Tampico Tamps, MX	daily low min	18.4 C (65.1 F)	4.6 C (8.3 F)	25 years	49 of 100 (Notable)
18 August 2026	Waynesboro 2 W, US	daily high max	40.6 C (105.1 F)	2.3 C (4.1 F)	116 years	49 of 100 (Notable)
18 August 2026	Plant City, US	daily high min	26.7 C (80.1 F)	1.1 C (2.0 F)	116 years	48 of 100 (Notable)
18 August 2026	Rucava, LV	daily rain	73.7 mm (2.9 in)	34.6 mm (1.4 in)	4 years	47 of 100 (Notable)
18 August 2026	Zoseni, LV	daily rain	54.4 mm (2.1 in)	14.4 mm (0.6 in)	64 years	46 of 100 (Notable)
18 August 2026	Lake Charles Chenault, US	daily high min	26.0 C (78.8 F)	1.0 C (1.8 F)	124 years	46 of 100 (Notable)
18 August 2026	Glen St Mary 1 W, US	daily high min	25.0 C (77.0 F)	1.7 C (3.1 F)	85 years	45 of 100 (Notable)
18 August 2026	Quicksand, US	daily high min	22.2 C (72.0 F)	1.6 C (2.9 F)	100 years	45 of 100 (Notable)
18 August 2026	Canton 4N, US	daily high min	25.6 C (78.1 F)	1.2 C (2.2 F)	111 years	45 of 100 (Notable)
18 August 2026	Moose, US	daily rain	38.1 mm (1.5 in)	15.5 mm (0.6 in)	43 years	45 of 100 (Notable)
18 August 2026	Mt Pleasant, US	daily high max	43.9 C (111.0 F)	2.2 C (4.0 F)	96 years	44 of 100 (Notable)
18 August 2026	Lumberton, US	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	115 years	43 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 2026

Records set or tied on this calendar date in each year from 1797 to 2026. 2026 had 545 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 2026-08-18: 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Margin	Records
0 to 10	359
10 to 20	15
20 to 30	9
30 to 40	3
40 to 50	3
50 to 60	0
60 to 70	1