Weather Records on 11 August 2018

861 weather records were set or tied worldwide on 11 August 2018. Highest significance: Napas, RU.

Key Facts for 11 August 2018

On 11 August 2018, 861 weather records were set or tied at long-record stations worldwide.
585 were record highs and 96 were record lows, counting maximum and minimum temperature.
By timescale, 24 were all-time records, 46 monthly and 791 daily.
Napas set a daily record precipitation of 48.7 mm (1.9 in) on 11 August 2018.
Across 161 earlier years (1793 to 2026) the same calendar date averaged 458 records.

Record Map

861 stations

861 station records on 11 August 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 August 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Napas	Russia	Record daily precipitation	48.7 mm (1.9 in)	60 of 100 (Major)
Goychay	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	58 of 100 (Notable)
Nordby (Fano)	Denmark	Record daily precipitation	34.2 mm (1.3 in)	57 of 100 (Notable)
Karlsborg_Mo	Sweden	Record daily precipitation	40.5 mm (1.6 in)	54 of 100 (Notable)
Red Lodge	United States	Record high maximum temperature	36.7 C (98.1 F)	52 of 100 (Notable)
Rosser	United States	Record daily precipitation	74.9 mm (2.9 in)	50 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	88.9 mm (3.5 in)	49 of 100 (Notable)
Saint Maries	United States	Record high maximum temperature	43.3 C (109.9 F)	48 of 100 (Notable)
Junction 4SSW	United States	Record low maximum temperature	23.9 C (75.0 F)	48 of 100 (Notable)
Anaconda	United States	Record high minimum temperature	15.6 C (60.1 F)	47 of 100 (Notable)
Anahuac	United States	Record daily precipitation	88.1 mm (3.5 in)	47 of 100 (Notable)
Ft Worth NAS	United States	Record daily precipitation	41.4 mm (1.6 in)	47 of 100 (Notable)
Yeelana (Brimpton Lake)	Australia	Record daily precipitation	26.2 mm (1.0 in)	46 of 100 (Notable)
Chifeng	China	Record daily precipitation	48.8 mm (1.9 in)	46 of 100 (Notable)
Oksningoy	Norway	Record daily precipitation	45.1 mm (1.8 in)	46 of 100 (Notable)
Baramossa	Sweden	Record daily precipitation	79.2 mm (3.1 in)	45 of 100 (Notable)
Porthill	United States	Record high maximum temperature	38.3 C (100.9 F)	45 of 100 (Notable)
Richfield	United States	Record high maximum temperature	38.9 C (102.0 F)	45 of 100 (Notable)
Luroy	Norway	Record daily precipitation	106.3 mm (4.2 in)	43 of 100 (Notable)
San Rafael-Civic Ctr	United States	Record high minimum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Ft Benton	United States	Record high maximum temperature	40.0 C (104.0 F)	43 of 100 (Notable)
McKinney Muni AP	United States	Record low maximum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Lewistown AP	United States	Record high maximum temperature	38.3 C (100.9 F)	43 of 100 (Notable)
Ristna	Estonia	Record daily precipitation	44.1 mm (1.7 in)	42 of 100 (Notable)
Glenns Ferry	United States	Record high maximum temperature	43.9 C (111.0 F)	42 of 100 (Notable)
Adel	United States	Record high maximum temperature	35.6 C (96.1 F)	42 of 100 (Notable)
Swan Lake	United States	Record high maximum temperature	41.1 C (106.0 F)	42 of 100 (Notable)
W Glacier	United States	Record high maximum temperature	37.8 C (100.0 F)	42 of 100 (Notable)
El Campo	United States	Record low minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Dal-Ftw Wscmo AP	United States	Record daily precipitation	51.8 mm (2.0 in)	42 of 100 (Notable)
Midland Odessa	United States	Record daily precipitation	46.5 mm (1.8 in)	42 of 100 (Notable)
McCall	United States	Record high maximum temperature	36.7 C (98.1 F)	41 of 100 (Notable)
Great Falls 16St	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Lima	United States	Record high maximum temperature	36.1 C (97.0 F)	41 of 100 (Notable)
Ferris	United States	Record daily precipitation	65.0 mm (2.6 in)	41 of 100 (Notable)
Rosalia	United States	Record high maximum temperature	41.1 C (106.0 F)	41 of 100 (Notable)
Sheringa (Lake Hamilton)	Australia	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Tegjultja	Russia	Record daily precipitation	27.8 mm (1.1 in)	40 of 100 (Notable)
Medicine Lake 3 SE	United States	Record high maximum temperature	40.6 C (105.1 F)	40 of 100 (Notable)
Jacksonville	United States	Record daily precipitation	63.5 mm (2.5 in)	40 of 100 (Notable)
Kemmerer 2N	United States	Record high maximum temperature	34.4 C (93.9 F)	40 of 100 (Notable)
Tbilisi	Georgia	Record low maximum temperature	20.5 C (68.9 F)	39 of 100 (Notable)
Goteborg A	Sweden	Record daily precipitation	43.7 mm (1.7 in)	39 of 100 (Notable)
Saint Anthony	United States	Record high maximum temperature	35.6 C (96.1 F)	39 of 100 (Notable)
Sugar City	United States	Record high maximum temperature	36.1 C (97.0 F)	39 of 100 (Notable)
Anaconda	United States	Record high maximum temperature	33.9 C (93.0 F)	39 of 100 (Notable)
Republic	United States	Record high maximum temperature	39.4 C (102.9 F)	39 of 100 (Notable)
Diversion Dam	United States	Record high maximum temperature	36.7 C (98.1 F)	39 of 100 (Notable)
Williston Sloulin Fld	United States	Record high maximum temperature	40.6 C (105.1 F)	39 of 100 (Notable)
Pilvo	Russia	Record daily precipitation	35.1 mm (1.4 in)	38 of 100 (Notable)
Santa Barbara	United States	Record high minimum temperature	18.9 C (66.0 F)	38 of 100 (Notable)
Sandpoint Exp STN	United States	Record high maximum temperature	36.7 C (98.1 F)	38 of 100 (Notable)
Bozeman Montana State UNIV	United States	Record high maximum temperature	37.8 C (100.0 F)	38 of 100 (Notable)
Cleburne	United States	Record daily precipitation	69.9 mm (2.8 in)	38 of 100 (Notable)
Rocksprings	United States	Record low maximum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
San Diego Intl AP	United States	Record high minimum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Superior	United States	Record high maximum temperature	41.7 C (107.1 F)	38 of 100 (Notable)
New Rvr McAf	United States	Record daily precipitation	92.5 mm (3.6 in)	38 of 100 (Notable)
Mount Hope (Fairview)	Australia	Record daily precipitation	27.0 mm (1.1 in)	37 of 100 (Notable)
Dillon U of Montana Western	United States	Record high maximum temperature	37.2 C (99.0 F)	37 of 100 (Notable)

Counts by Type and Timescale

861 records

Records set or tied on 11 August 2018 by type: Highest daily maximum 355, Lowest daily maximum 61, Highest daily minimum 230, Lowest daily minimum 35, Heaviest daily rainfall 180.

Records on 11 August 2018 by type
Record type	Records
Highest daily maximum	355
Lowest daily maximum	61
Highest daily minimum	230
Lowest daily minimum	35
Heaviest daily rainfall	180
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 11 August 2018 by timescale: all-time 24, monthly 46, daily 791.

How Much Records Were Beaten By

692 broken records

Margins by which the 692 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 69.9. Ties are not counted.

Top 20 by Significance

11 August 2018

Top 20 records on 11 August 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 August 2018	Napas, RU	daily rain	48.7 mm (1.9 in)	31.3 mm (1.2 in)	40 years	60 of 100 (Major)
11 August 2018	Goychay, AZ	daily rain	99.1 mm (3.9 in)	69.9 mm (2.8 in)	33 years	58 of 100 (Notable)
11 August 2018	Nordby (Fano), DK	daily rain	34.2 mm (1.3 in)	11.9 mm (0.5 in)	120 years	57 of 100 (Notable)
11 August 2018	Karlsborg_Mo, SE	daily rain	40.5 mm (1.6 in)	24.2 mm (1.0 in)	51 years	54 of 100 (Notable)
11 August 2018	Red Lodge, US	monthly high max	36.7 C (98.1 F)	1.1 C (2.0 F)	118 years	52 of 100 (Notable)
11 August 2018	Rosser, US	daily rain	74.9 mm (2.9 in)	41.9 mm (1.6 in)	60 years	50 of 100 (Notable)
11 August 2018	Hillsboro, US	daily rain	88.9 mm (3.5 in)	50.5 mm (2.0 in)	39 years	49 of 100 (Notable)
11 August 2018	Saint Maries, US	all-time high max	43.3 C (109.9 F)	0.5 C (0.9 F)	57 years	48 of 100 (Notable)
11 August 2018	Junction 4SSW, US	daily low max	23.9 C (75.0 F)	2.8 C (5.0 F)	104 years	48 of 100 (Notable)
11 August 2018	Anaconda, US	daily high min	15.6 C (60.1 F)	2.3 C (4.1 F)	112 years	47 of 100 (Notable)
11 August 2018	Anahuac, US	daily rain	88.1 mm (3.5 in)	52.3 mm (2.1 in)	52 years	47 of 100 (Notable)
11 August 2018	Ft Worth NAS, US	daily rain	41.4 mm (1.6 in)	29.5 mm (1.2 in)	63 years	47 of 100 (Notable)
11 August 2018	Yeelana (Brimpton Lake), AU	daily rain	26.2 mm (1.0 in)	7.7 mm (0.30 in)	72 years	46 of 100 (Notable)
11 August 2018	Chifeng, CN	daily rain	48.8 mm (1.9 in)	25.4 mm (1.0 in)	60 years	46 of 100 (Notable)
11 August 2018	Oksningoy, NO	daily rain	45.1 mm (1.8 in)	17.6 mm (0.7 in)	60 years	46 of 100 (Notable)
11 August 2018	Baramossa, SE	daily rain	79.2 mm (3.1 in)	50.6 mm (2.0 in)	4 years	45 of 100 (Notable)
11 August 2018	Porthill, US	daily high max	38.3 C (100.9 F)	2.7 C (4.9 F)	112 years	45 of 100 (Notable)
11 August 2018	Richfield, US	daily high max	38.9 C (102.0 F)	2.8 C (5.0 F)	95 years	45 of 100 (Notable)
11 August 2018	Luroy, NO	daily rain	106.3 mm (4.2 in)	53.7 mm (2.1 in)	0 years	43 of 100 (Notable)
11 August 2018	San Rafael-Civic Ctr, US	daily high min	15.6 C (60.1 F)	0.6 C (1.1 F)	112 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

1793 to 2018

Records set or tied on this calendar date in each year from 1793 to 2018. 2018 had 861 records.

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

Records on 08-11 in each year
Year	Records
1793	1
1796	1
1811	1
1815	2
1838	1
1839	1
1841	1
1851	1
1855	1
1858	1
1861	2
1862	1
1863	1
1864	6
1865	1
1866	6
1869	4
1871	1
1875	1
1879	2
1881	1
1883	1
1885	1
1888	1
1889	4
1890	4
1891	1
1892	4
1893	1
1894	1
1895	2
1896	5
1897	3
1898	2
1899	3
1900	4
1901	4
1902	13
1903	12
1904	19
1905	9
1906	6
1907	8
1908	10
1909	41
1910	9
1911	24
1912	46
1913	43
1914	26
1915	27
1916	64
1917	217
1918	29
1919	18
1920	54
1921	201
1922	98
1923	80
1924	149
1925	219
1926	140
1927	190
1928	174
1929	354
1930	471
1931	453
1932	281
1933	416
1934	620
1935	499
1936	541
1937	356
1938	315
1939	389
1940	359
1941	807
1942	390
1943	345
1944	936
1945	401
1946	419
1947	709
1948	306
1949	471
1950	320
1951	296
1952	417
1953	283
1954	536
1955	319
1956	457
1957	305
1958	494
1959	337
1960	461
1961	429
1962	662
1963	493
1964	677
1965	793
1966	1,037
1967	1,071
1968	619
1969	533
1970	526
1971	711
1972	823
1973	451
1974	596
1975	753
1976	529
1977	845
1978	433
1979	797
1980	929
1981	645
1982	1,232
1983	1,095
1984	822
1985	804
1986	563
1987	885
1988	1,119
1989	983
1990	760
1991	822
1992	928
1993	840
1994	1,173
1995	1,324
1996	1,147
1997	1,512
1998	1,232
1999	1,152
2000	924
2001	811
2002	1,152
2003	1,601
2004	1,478
2005	1,031
2006	896
2007	1,428
2008	945
2009	836
2010	2,289
2011	1,106
2012	953
2013	470
2014	556
2015	696
2016	1,340
2017	619
2018	861
2019	758
2020	688
2021	834
2022	661
2023	757
2024	643
2025	722
2026	765

Download the Data

Data for records on 2018-08-11: 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	637
10 to 20	28
20 to 30	9
30 to 40	8
40 to 50	3
50 to 60	5
60 to 70	2