Weather Records on 31 August 2018

366 weather records were set or tied worldwide on 31 August 2018. Highest significance: Reading Wb City, US.

Key Facts for 31 August 2018

On 31 August 2018, 366 weather records were set or tied at long-record stations worldwide.
160 were record highs and 51 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 355 daily.
Reading Wb City set a daily record precipitation of 112.8 mm (4.4 in) on 31 August 2018.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 436 records.

Record Map

366 stations

366 station records on 31 August 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 August 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Reading Wb City	United States	Record daily precipitation	112.8 mm (4.4 in)	73 of 100 (Major)
Suhana	Russia	Record daily precipitation	37.9 mm (1.5 in)	69 of 100 (Major)
Cali/Alfonso Bonill	Colombia	Record daily precipitation	152.1 mm (6.0 in)	66 of 100 (Major)
Mumby	Australia	Record daily precipitation	44.0 mm (1.7 in)	63 of 100 (Major)
Malexander	Sweden	Record daily precipitation	42.8 mm (1.7 in)	59 of 100 (Notable)
Rosa Brook	Australia	Record daily precipitation	80.5 mm (3.2 in)	58 of 100 (Notable)
Holmbo_D	Sweden	Record daily precipitation	52.1 mm (2.1 in)	57 of 100 (Notable)
Bolivar 1 NE	United States	Record daily precipitation	79.8 mm (3.1 in)	52 of 100 (Notable)
Hogemalen	Sweden	Record daily precipitation	39.7 mm (1.6 in)	51 of 100 (Notable)
Shinjo	Japan	Record daily precipitation	156.0 mm (6.1 in)	48 of 100 (Notable)
Murphy 4ESE	United States	Record daily precipitation	72.6 mm (2.9 in)	48 of 100 (Notable)
Annapolis US Naval Academy Aso	United States	Record daily precipitation	95.2 mm (3.7 in)	48 of 100 (Notable)
Wajima	Japan	Record daily precipitation	198.1 mm (7.8 in)	47 of 100 (Notable)
Fagerhult_D	Sweden	Record daily precipitation	43.5 mm (1.7 in)	43 of 100 (Notable)
Hayden	United States	Record high minimum temperature	15.0 C (59.0 F)	43 of 100 (Notable)
Cordele	United States	Record daily precipitation	35.6 mm (1.4 in)	43 of 100 (Notable)
New Park	United States	Record daily precipitation	99.1 mm (3.9 in)	43 of 100 (Notable)
Svinhult_D	Sweden	Record daily precipitation	39.3 mm (1.5 in)	42 of 100 (Notable)
Sarh	Chad	Record low minimum temperature	16.5 C (61.7 F)	41 of 100 (Notable)
Port Lincoln (Woolga)	Australia	Record daily precipitation	27.0 mm (1.1 in)	40 of 100 (Notable)
Hestra	Sweden	Record daily precipitation	34.8 mm (1.4 in)	39 of 100 (Notable)
Bay City Wtr Wks	United States	Record low minimum temperature	15.0 C (59.0 F)	39 of 100 (Notable)
Waldron	United States	Record daily precipitation	59.7 mm (2.4 in)	38 of 100 (Notable)
Kandalaksa	Russia	Record high minimum temperature	13.6 C (56.5 F)	37 of 100 (Notable)
Hamburg	United States	Record high minimum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Agalega	Mauritius	Record low maximum temperature	25.0 C (77.0 F)	36 of 100 (Notable)
Stockton Dam	United States	Record daily precipitation	70.1 mm (2.8 in)	36 of 100 (Notable)
Gwalior	India	Record low minimum temperature	21.2 C (70.2 F)	35 of 100 (Notable)
Balasore	India	Record low minimum temperature	20.1 C (68.2 F)	35 of 100 (Notable)
Gustorp_D	Sweden	Record daily precipitation	46.9 mm (1.8 in)	35 of 100 (Notable)
Niceville	United States	Record daily precipitation	43.2 mm (1.7 in)	35 of 100 (Notable)
Stevensville 2SW	United States	Record high minimum temperature	24.4 C (75.9 F)	35 of 100 (Notable)
Napas	Russia	Record daily precipitation	27.8 mm (1.1 in)	34 of 100 (Routine)
Greenbrier	United States	Record daily precipitation	48.3 mm (1.9 in)	34 of 100 (Routine)
Lead Hill	United States	Record low maximum temperature	21.7 C (71.1 F)	34 of 100 (Routine)
Oswego 1 N	United States	Record daily precipitation	72.4 mm (2.9 in)	34 of 100 (Routine)
Amistad 5 SSW	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Grandfather Mtn	United States	Record high maximum temperature	26.7 C (80.1 F)	34 of 100 (Routine)
Flinders Chase (Rocky River)	Australia	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Zhigansk	Russia	Record high minimum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Calico Rock 2 WSW	United States	Record daily precipitation	66.0 mm (2.6 in)	33 of 100 (Routine)
Galena	United States	Record daily precipitation	63.2 mm (2.5 in)	33 of 100 (Routine)
Vigra	Norway	Record low minimum temperature	4.5 C (40.1 F)	32 of 100 (Routine)
Nagqu	China	Record high minimum temperature	8.7 C (47.7 F)	31 of 100 (Routine)
Kon-Kolodez	Russia	Record high maximum temperature	33.0 C (91.4 F)	31 of 100 (Routine)
Oskarshamn	Sweden	Record daily precipitation	33.6 mm (1.3 in)	31 of 100 (Routine)
Simferopol	Ukraine	Record high minimum temperature	21.5 C (70.7 F)	31 of 100 (Routine)
Heyuan	China	Record daily precipitation	76.2 mm (3.0 in)	30 of 100 (Routine)
Kanchanaburi	Thailand	Record low minimum temperature	22.1 C (71.8 F)	30 of 100 (Routine)
Pomme de Terre Dam	United States	Record daily precipitation	53.1 mm (2.1 in)	30 of 100 (Routine)
Sokode	Togo	Record high minimum temperature	22.5 C (72.5 F)	29 of 100 (Routine)
Pattonsburg 2S	United States	Record daily precipitation	42.7 mm (1.7 in)	29 of 100 (Routine)
Wasola 5N	United States	Record low maximum temperature	21.1 C (70.0 F)	29 of 100 (Routine)
Lancaster 2 NE Filt Plt	United States	Record daily precipitation	33.3 mm (1.3 in)	29 of 100 (Routine)
Sparta Wwtp	United States	Record daily precipitation	52.3 mm (2.1 in)	29 of 100 (Routine)
Bluestone Lake	United States	Record daily precipitation	48.3 mm (1.9 in)	29 of 100 (Routine)
Wallops Is Nasa Test Facility	United States	Record daily precipitation	28.7 mm (1.1 in)	29 of 100 (Routine)
Spickard 7 W	United States	Record daily precipitation	55.4 mm (2.2 in)	28 of 100 (Routine)
Blinman	Australia	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Innsbruck	Austria	Record daily precipitation	40.0 mm (1.6 in)	27 of 100 (Routine)

Counts by Type and Timescale

366 records

Records set or tied on 31 August 2018 by type: Highest daily maximum 52, Lowest daily maximum 32, Highest daily minimum 108, Lowest daily minimum 19, Heaviest daily rainfall 155.

Records on 31 August 2018 by type
Record type	Records
Highest daily maximum	52
Lowest daily maximum	32
Highest daily minimum	108
Lowest daily minimum	19
Heaviest daily rainfall	155
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 August 2018 by timescale: all-time 0, monthly 11, daily 355.

How Much Records Were Beaten By

303 broken records

Margins by which the 303 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 103.9. Ties are not counted.

Top 20 by Significance

31 August 2018

Top 20 records on 31 August 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 2018	Reading Wb City, US	daily rain	112.8 mm (4.4 in)	50.8 mm (2.0 in)	96 years	73 of 100 (Major)
31 August 2018	Suhana, RU	daily rain	37.9 mm (1.5 in)	19.1 mm (0.8 in)	79 years	69 of 100 (Major)
31 August 2018	Cali/Alfonso Bonill, CO	monthly rain	152.1 mm (6.0 in)	92.1 mm (3.6 in)	39 years	66 of 100 (Major)
31 August 2018	Mumby, AU	daily rain	44.0 mm (1.7 in)	30.0 mm (1.2 in)	44 years	63 of 100 (Major)
31 August 2018	Malexander, SE	daily rain	42.8 mm (1.7 in)	25.8 mm (1.0 in)	40 years	59 of 100 (Notable)
31 August 2018	Rosa Brook, AU	monthly rain	80.5 mm (3.2 in)	15.0 mm (0.6 in)	81 years	58 of 100 (Notable)
31 August 2018	Holmbo_D, SE	daily rain	52.1 mm (2.1 in)	21.5 mm (0.8 in)	72 years	57 of 100 (Notable)
31 August 2018	Bolivar 1 NE, US	daily rain	79.8 mm (3.1 in)	23.9 mm (0.9 in)	93 years	52 of 100 (Notable)
31 August 2018	Hogemalen, SE	daily rain	39.7 mm (1.6 in)	15.7 mm (0.6 in)	72 years	51 of 100 (Notable)
31 August 2018	Shinjo, JP	daily rain	156.0 mm (6.1 in)	103.9 mm (4.1 in)	9 years	48 of 100 (Notable)
31 August 2018	Murphy 4ESE, US	daily rain	72.6 mm (2.9 in)	11.6 mm (0.5 in)	139 years	48 of 100 (Notable)
31 August 2018	Annapolis US Naval Academy Aso, US	daily rain	95.2 mm (3.7 in)	85.5 mm (3.4 in)	4 years	48 of 100 (Notable)
31 August 2018	Wajima, JP	daily rain	198.1 mm (7.8 in)	94.2 mm (3.7 in)	11 years	47 of 100 (Notable)
31 August 2018	Fagerhult_D, SE	daily rain	43.5 mm (1.7 in)	10.1 mm (0.4 in)	72 years	43 of 100 (Notable)
31 August 2018	Hayden, US	daily high min	15.0 C (59.0 F)	2.2 C (4.0 F)	88 years	43 of 100 (Notable)
31 August 2018	Cordele, US	daily rain	35.6 mm (1.4 in)	5.1 mm (0.20 in)	122 years	43 of 100 (Notable)
31 August 2018	New Park, US	daily rain	99.1 mm (3.9 in)	25.4 mm (1.0 in)	68 years	43 of 100 (Notable)
31 August 2018	Svinhult_D, SE	daily rain	39.3 mm (1.5 in)	10.3 mm (0.4 in)	72 years	42 of 100 (Notable)
31 August 2018	Sarh, TD	daily low min	16.5 C (61.7 F)	2.2 C (4.0 F)	49 years	41 of 100 (Notable)
31 August 2018	Port Lincoln (Woolga), AU	daily rain	27.0 mm (1.1 in)	3.1 mm (0.12 in)	84 years	40 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

1796 to 2018

Records set or tied on this calendar date in each year from 1796 to 2018. 2018 had 366 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 2018-08-31: 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	280
20 to 40	16
40 to 60	3
60 to 80	0
80 to 100	3
100 to 120	1