Weather Records on 20 August 1986

819 weather records were set or tied worldwide on 20 August 1986. Highest significance: Gavle, SE.

Key Facts for 20 August 1986

On 20 August 1986, 819 weather records were set or tied at long-record stations worldwide.
431 were record highs and 197 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 28 monthly and 785 daily.
Gavle set a daily record precipitation of 59.4 mm (2.3 in) on 20 August 1986.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 453 records.

Record Map

819 stations

819 station records on 20 August 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Gavle	Sweden	Record daily precipitation	59.4 mm (2.3 in)	67 of 100 (Major)
Baltimore Customs House	United States	Record daily precipitation	74.9 mm (2.9 in)	65 of 100 (Major)
Raleigh 4 SW	United States	Record daily precipitation	91.4 mm (3.6 in)	54 of 100 (Notable)
Astolfo Dutra	Brazil	Record daily precipitation	29.0 mm (1.1 in)	53 of 100 (Notable)
Koloko Rsvr 1137	United States	Record daily precipitation	50.8 mm (2.0 in)	51 of 100 (Notable)
Telluride 4WNW	United States	Record high minimum temperature	14.4 C (57.9 F)	49 of 100 (Notable)
Bedford	United States	Record low maximum temperature	19.4 C (66.9 F)	49 of 100 (Notable)
Bartow 1SE	United States	Record low maximum temperature	24.4 C (75.9 F)	47 of 100 (Notable)
Landsort	Sweden	Record daily precipitation	27.0 mm (1.1 in)	46 of 100 (Notable)
Florence 8 NE	United States	Record daily precipitation	89.7 mm (3.5 in)	46 of 100 (Notable)
Gaffney 6 E	United States	Record daily precipitation	61.0 mm (2.4 in)	46 of 100 (Notable)
Rangely 1E	United States	Record high minimum temperature	18.3 C (64.9 F)	45 of 100 (Notable)
Monroe 2 SE	United States	Record daily precipitation	89.9 mm (3.5 in)	45 of 100 (Notable)
Idracowra	Australia	Record daily precipitation	30.0 mm (1.2 in)	44 of 100 (Notable)
Lazdijai	Lithuania	Record daily precipitation	41.8 mm (1.6 in)	44 of 100 (Notable)
Varberg	Sweden	Record daily precipitation	55.9 mm (2.2 in)	44 of 100 (Notable)
Kocenevo	Russia	Record daily precipitation	31.9 mm (1.3 in)	43 of 100 (Notable)
Lockhart	United States	Record daily precipitation	146.1 mm (5.8 in)	42 of 100 (Notable)
Ojai	United States	Record high minimum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
Lake City 2 E	United States	Record daily precipitation	53.1 mm (2.1 in)	41 of 100 (Notable)
Folkston 9 SW	United States	Record daily precipitation	99.1 mm (3.9 in)	41 of 100 (Notable)
Hillsboro	United States	Record high maximum temperature	36.7 C (98.1 F)	41 of 100 (Notable)
Lake City 2 SE	United States	Record daily precipitation	136.7 mm (5.4 in)	41 of 100 (Notable)
Rocksprings	United States	Record high maximum temperature	39.4 C (102.9 F)	41 of 100 (Notable)
Wilgeboom (Bos)	South Africa	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Hamlet	United States	Record daily precipitation	94.5 mm (3.7 in)	40 of 100 (Notable)
Philpott Dam 2	United States	Record daily precipitation	84.1 mm (3.3 in)	39 of 100 (Notable)
Los Angeles Downtown/Usc	United States	Record high maximum temperature	36.1 C (97.0 F)	39 of 100 (Notable)
Niamey Aero	Niger	Record daily precipitation	180.1 mm (7.1 in)	38 of 100 (Notable)
Porterville	United States	Record high minimum temperature	23.9 C (75.0 F)	38 of 100 (Notable)
Roy	United States	Record daily precipitation	33.5 mm (1.3 in)	38 of 100 (Notable)
Spearfish	United States	Record high maximum temperature	37.8 C (100.0 F)	38 of 100 (Notable)
Ferron	United States	Record high maximum temperature	33.9 C (93.0 F)	38 of 100 (Notable)
Wytheville	United States	Record low maximum temperature	21.1 C (70.0 F)	38 of 100 (Notable)
Eielson Fld	United States	Record daily precipitation	34.5 mm (1.4 in)	38 of 100 (Notable)
Bhubaneswar	India	Record daily precipitation	136.9 mm (5.4 in)	37 of 100 (Notable)
Sar'ja	Russia	Record daily precipitation	30.4 mm (1.2 in)	37 of 100 (Notable)
Merced	United States	Record high minimum temperature	21.1 C (70.0 F)	37 of 100 (Notable)
Nevada City	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Glenwood Spgs #2	United States	Record high minimum temperature	14.4 C (57.9 F)	37 of 100 (Notable)
Givhans Ferry 2 ESE	United States	Record daily precipitation	88.9 mm (3.5 in)	37 of 100 (Notable)
Ft Collins	United States	Record high minimum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Redlands	United States	Record high maximum temperature	41.7 C (107.1 F)	35 of 100 (Notable)
Beloit	United States	Record daily precipitation	57.4 mm (2.3 in)	35 of 100 (Notable)
Brownsville	United States	Record high maximum temperature	38.3 C (100.9 F)	35 of 100 (Notable)
Oestersund-Froesoen	Sweden	Record low maximum temperature	9.0 C (48.2 F)	34 of 100 (Routine)
Dry Canyon Rsvr	United States	Record high minimum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Homestead Exp STN	United States	Record low maximum temperature	28.3 C (82.9 F)	34 of 100 (Routine)
Carthage Wtp	United States	Record daily precipitation	62.5 mm (2.5 in)	34 of 100 (Routine)
Stratford	United States	Record daily precipitation	71.1 mm (2.8 in)	34 of 100 (Routine)
Akron 4 E	United States	Record high minimum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Denton 2 E	United States	Record low maximum temperature	23.9 C (75.0 F)	33 of 100 (Routine)
Coleman	United States	Record high maximum temperature	43.3 C (109.9 F)	33 of 100 (Routine)
La Junta	Mexico	Record low minimum temperature	7.8 C (46.0 F)	32 of 100 (Routine)
Iguala (Smn)	Mexico	Record high minimum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Laguna Beach	United States	Record high maximum temperature	32.8 C (91.0 F)	32 of 100 (Routine)
Cedaredge	United States	Record high minimum temperature	16.7 C (62.1 F)	32 of 100 (Routine)
Kingston	United States	Record daily precipitation	50.8 mm (2.0 in)	32 of 100 (Routine)
Dulce	United States	Record high minimum temperature	20.6 C (69.1 F)	32 of 100 (Routine)
San Angelo	United States	Record high maximum temperature	42.8 C (109.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

819 records

Records set or tied on 20 August 1986 by type: Highest daily maximum 258, Lowest daily maximum 98, Highest daily minimum 173, Lowest daily minimum 99, Heaviest daily rainfall 191.

Records on 20 August 1986 by type
Record type	Records
Highest daily maximum	258
Lowest daily maximum	98
Highest daily minimum	173
Lowest daily minimum	99
Heaviest daily rainfall	191
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1986 by timescale: all-time 6, monthly 28, daily 785.

How Much Records Were Beaten By

598 broken records

Margins by which the 598 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 63.3. Ties are not counted.

Top 20 by Significance

20 August 1986

Top 20 records on 20 August 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1986	Gavle, SE	daily rain	59.4 mm (2.3 in)	38.7 mm (1.5 in)	59 years	67 of 100 (Major)
20 August 1986	Baltimore Customs House, US	daily rain	74.9 mm (2.9 in)	44.9 mm (1.8 in)	95 years	65 of 100 (Major)
20 August 1986	Raleigh 4 SW, US	daily rain	91.4 mm (3.6 in)	59.1 mm (2.3 in)	40 years	54 of 100 (Notable)
20 August 1986	Astolfo Dutra, BR	daily rain	29.0 mm (1.1 in)	29.0 mm (1.1 in)	47 years	53 of 100 (Notable)
20 August 1986	Koloko Rsvr 1137, US	daily rain	50.8 mm (2.0 in)	38.6 mm (1.5 in)	37 years	51 of 100 (Notable)
20 August 1986	Telluride 4WNW, US	all-time high min	14.4 C (57.9 F)	1.1 C (2.0 F)	61 years	49 of 100 (Notable)
20 August 1986	Bedford, US	daily low max	19.4 C (66.9 F)	4.5 C (8.1 F)	90 years	49 of 100 (Notable)
20 August 1986	Bartow 1SE, US	daily low max	24.4 C (75.9 F)	3.4 C (6.1 F)	64 years	47 of 100 (Notable)
20 August 1986	Landsort, SE	daily rain	27.0 mm (1.1 in)	6.0 mm (0.24 in)	96 years	46 of 100 (Notable)
20 August 1986	Florence 8 NE, US	daily rain	89.7 mm (3.5 in)	63.3 mm (2.5 in)	13 years	46 of 100 (Notable)
20 August 1986	Gaffney 6 E, US	daily rain	61.0 mm (2.4 in)	48.3 mm (1.9 in)	37 years	46 of 100 (Notable)
20 August 1986	Rangely 1E, US	daily high min	18.3 C (64.9 F)	3.3 C (5.9 F)	91 years	45 of 100 (Notable)
20 August 1986	Monroe 2 SE, US	daily rain	89.9 mm (3.5 in)	18.8 mm (0.7 in)	87 years	45 of 100 (Notable)
20 August 1986	Idracowra, AU	daily rain	30.0 mm (1.2 in)	28.4 mm (1.1 in)	1 year	44 of 100 (Notable)
20 August 1986	Lazdijai, LT	daily rain	41.8 mm (1.6 in)	21.1 mm (0.8 in)	49 years	44 of 100 (Notable)
20 August 1986	Varberg, SE	daily rain	55.9 mm (2.2 in)	25.3 mm (1.0 in)	4 years	44 of 100 (Notable)
20 August 1986	Kocenevo, RU	daily rain	31.9 mm (1.3 in)	27.7 mm (1.1 in)	28 years	43 of 100 (Notable)
20 August 1986	Lockhart, US	all-time rain	146.1 mm (5.8 in)	13.5 mm (0.5 in)	26 years	42 of 100 (Notable)
20 August 1986	Ojai, US	daily high min	21.1 C (70.0 F)	2.8 C (5.0 F)	80 years	41 of 100 (Notable)
20 August 1986	Lake City 2 E, US	daily rain	53.1 mm (2.1 in)	13.2 mm (0.5 in)	83 years	41 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 1986

Records set or tied on this calendar date in each year from 1797 to 1986. 1986 had 819 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 1986-08-20: 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 10	521
10 to 20	39
20 to 30	22
30 to 40	7
40 to 50	6
50 to 60	2
60 to 70	1