Weather Records on 25 August 1986

778 weather records were set or tied worldwide on 25 August 1986. Highest significance: Bradford, GB.

Key Facts for 25 August 1986

On 25 August 1986, 778 weather records were set or tied at long-record stations worldwide.
137 were record highs and 281 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 32 monthly and 743 daily.
Bradford set an all-time record daily precipitation of 82.8 mm (3.3 in) on 25 August 1986.
Across 168 earlier years (1796 to 2026) the same calendar date averaged 435 records.

Record Map

778 stations

778 station records on 25 August 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 25 August 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bradford	United Kingdom	Record daily precipitation	82.8 mm (3.3 in)	75 of 100 (Major)
Kiev	Ukraine	Record daily precipitation	41.8 mm (1.6 in)	65 of 100 (Major)
Hull	United Kingdom	Record daily precipitation	46.8 mm (1.8 in)	61 of 100 (Major)
Hull	United Kingdom	Record daily precipitation	46.8 mm (1.8 in)	58 of 100 (Notable)
Durham	United Kingdom	Record daily precipitation	69.1 mm (2.7 in)	56 of 100 (Notable)
Santo Antonio (Pcd)	Brazil	Record daily precipitation	32.0 mm (1.3 in)	54 of 100 (Notable)
Waterford (Tycor)	Ireland	Record daily precipitation	64.0 mm (2.5 in)	54 of 100 (Notable)
Hawarden Bridge	United Kingdom	Record daily precipitation	50.2 mm (2.0 in)	53 of 100 (Notable)
Malvern	United Kingdom	Record daily precipitation	41.8 mm (1.6 in)	53 of 100 (Notable)
Buxton	United Kingdom	Record daily precipitation	67.3 mm (2.6 in)	52 of 100 (Notable)
Vastervik	Sweden	Record low minimum temperature	3.2 C (37.8 F)	47 of 100 (Notable)
Porto	Brazil	Record daily precipitation	30.7 mm (1.2 in)	46 of 100 (Notable)
Sheffield	United Kingdom	Record daily precipitation	66.5 mm (2.6 in)	45 of 100 (Notable)
Woodland	United States	Record daily precipitation	41.9 mm (1.6 in)	45 of 100 (Notable)
Sao Paulo	Brazil	Record daily precipitation	69.9 mm (2.8 in)	44 of 100 (Notable)
Tangancicuaro	Mexico	Record low minimum temperature	1.7 C (35.1 F)	44 of 100 (Notable)
Armagh	United Kingdom	Record low maximum temperature	11.5 C (52.7 F)	44 of 100 (Notable)
Napa State Hospital	United States	Record high minimum temperature	18.9 C (66.0 F)	44 of 100 (Notable)
Adamantina	Brazil	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Rothamsted	United Kingdom	Record daily precipitation	34.1 mm (1.3 in)	43 of 100 (Notable)
Spencer 6 SSE	United States	Record daily precipitation	43.9 mm (1.7 in)	42 of 100 (Notable)
Santa Gertrudis	Mexico	Record low minimum temperature	10.0 C (50.0 F)	40 of 100 (Notable)
Vasteras-Hasslo	Sweden	Record low maximum temperature	12.0 C (53.6 F)	40 of 100 (Notable)
Wanakena Rngr School	United States	Record low maximum temperature	11.1 C (52.0 F)	40 of 100 (Notable)
Mococa	Brazil	Record daily precipitation	36.1 mm (1.4 in)	39 of 100 (Notable)
Salvatierra	Mexico	Record low maximum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Santo Domingo	Mexico	Record low minimum temperature	10.0 C (50.0 F)	38 of 100 (Notable)
Tonichi	Mexico	Record low minimum temperature	15.0 C (59.0 F)	38 of 100 (Notable)
Don Muang	Thailand	Record low minimum temperature	16.6 C (61.9 F)	38 of 100 (Notable)
Prescott	United States	Record low maximum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Wijk_Aan_Zee_1	Netherlands	Record daily precipitation	26.7 mm (1.1 in)	37 of 100 (Notable)
Durham	United Kingdom	Record low minimum temperature	2.8 C (37.0 F)	37 of 100 (Notable)
Birr	Ireland	Record daily precipitation	33.3 mm (1.3 in)	36 of 100 (Notable)
Dublin Phoenix Park	Ireland	Record low maximum temperature	12.7 C (54.9 F)	36 of 100 (Notable)
Cosmorama	Brazil	Record daily precipitation	27.7 mm (1.1 in)	35 of 100 (Notable)
Irapuru	Brazil	Record daily precipitation	34.6 mm (1.4 in)	35 of 100 (Notable)
Keams Canyon	United States	Record daily precipitation	40.6 mm (1.6 in)	35 of 100 (Notable)
Newcastle	United States	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
Tierra Amarilla 4 N	United States	Record daily precipitation	44.5 mm (1.8 in)	35 of 100 (Notable)
Malvern	United Kingdom	Record low maximum temperature	14.6 C (58.3 F)	34 of 100 (Routine)
Santa Sofia	Brazil	Record daily precipitation	28.0 mm (1.1 in)	33 of 100 (Routine)
Karasjok	Norway	Record low minimum temperature	-3.6 C (25.5 F)	33 of 100 (Routine)
Eastbourne	United Kingdom	Record low maximum temperature	15.7 C (60.3 F)	33 of 100 (Routine)
Durham	United Kingdom	Record low maximum temperature	11.5 C (52.7 F)	33 of 100 (Routine)
Uman	Ukraine	Record daily precipitation	25.6 mm (1.0 in)	33 of 100 (Routine)
Crescent City	United States	Record high maximum temperature	37.8 C (100.0 F)	33 of 100 (Routine)
Luna Rs	United States	Record high minimum temperature	13.9 C (57.0 F)	33 of 100 (Routine)
Chasm Falls	United States	Record daily precipitation	29.2 mm (1.1 in)	33 of 100 (Routine)
Junction 4SSW	United States	Record low maximum temperature	25.0 C (77.0 F)	33 of 100 (Routine)
Ibitinga	Brazil	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Zandvoort	Netherlands	Record daily precipitation	25.8 mm (1.0 in)	32 of 100 (Routine)
Overveen	Netherlands	Record daily precipitation	29.7 mm (1.2 in)	32 of 100 (Routine)
Oceanside Marina	United States	Record low maximum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Council	United States	Record high minimum temperature	17.8 C (64.0 F)	32 of 100 (Routine)
Pirassununga	Brazil	Record daily precipitation	25.9 mm (1.0 in)	31 of 100 (Routine)
Live Oak	United States	Record high maximum temperature	36.7 C (98.1 F)	31 of 100 (Routine)
Stillwater Rsvr	United States	Record low maximum temperature	10.6 C (51.1 F)	31 of 100 (Routine)
Rugozero	Russia	Record daily precipitation	31.0 mm (1.2 in)	30 of 100 (Routine)
Flahult	Sweden	Record low minimum temperature	-1.0 C (30.2 F)	30 of 100 (Routine)
Bolgrad	Ukraine	Record daily precipitation	29.4 mm (1.2 in)	30 of 100 (Routine)

Counts by Type and Timescale

778 records

Records set or tied on 25 August 1986 by type: Highest daily maximum 60, Lowest daily maximum 124, Highest daily minimum 77, Lowest daily minimum 157, Heaviest daily rainfall 360.

Records on 25 August 1986 by type
Record type	Records
Highest daily maximum	60
Lowest daily maximum	124
Highest daily minimum	77
Lowest daily minimum	157
Heaviest daily rainfall	360
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 25 August 1986 by timescale: all-time 3, monthly 32, daily 743.

How Much Records Were Beaten By

647 broken records

Margins by which the 647 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 40.5. Ties are not counted.

Top 20 by Significance

25 August 1986

Top 20 records on 25 August 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 August 1986	Bradford, GB	all-time rain	82.8 mm (3.3 in)	24.0 mm (0.9 in)	42 years	75 of 100 (Major)
25 August 1986	Kiev, UA	daily rain	41.8 mm (1.6 in)	20.3 mm (0.8 in)	101 years	65 of 100 (Major)
25 August 1986	Hull, GB	daily rain	46.8 mm (1.8 in)	32.1 mm (1.3 in)	44 years	61 of 100 (Major)
25 August 1986	Hull, GB	daily rain	46.8 mm (1.8 in)	32.1 mm (1.3 in)	44 years	58 of 100 (Notable)
25 August 1986	Durham, GB	monthly rain	69.1 mm (2.7 in)	18.8 mm (0.7 in)	15 years	56 of 100 (Notable)
25 August 1986	Santo Antonio (Pcd), BR	monthly rain	32.0 mm (1.3 in)	18.4 mm (0.7 in)	0 years	54 of 100 (Notable)
25 August 1986	Waterford (Tycor), IE	daily rain	64.0 mm (2.5 in)	35.1 mm (1.4 in)	36 years	54 of 100 (Notable)
25 August 1986	Hawarden Bridge, GB	monthly rain	50.2 mm (2.0 in)	14.7 mm (0.6 in)	30 years	53 of 100 (Notable)
25 August 1986	Malvern, GB	daily rain	41.8 mm (1.6 in)	16.1 mm (0.6 in)	73 years	53 of 100 (Notable)
25 August 1986	Buxton, GB	monthly rain	67.3 mm (2.6 in)	22.0 mm (0.9 in)	6 years	52 of 100 (Notable)
25 August 1986	Vastervik, SE	monthly low min	3.2 C (37.8 F)	0.3 C (0.5 F)	86 years	47 of 100 (Notable)
25 August 1986	Porto, BR	daily rain	30.7 mm (1.2 in)	25.1 mm (1.0 in)	9 years	46 of 100 (Notable)
25 August 1986	Sheffield, GB	monthly rain	66.5 mm (2.6 in)	4.4 mm (0.17 in)	64 years	45 of 100 (Notable)
25 August 1986	Woodland, US	daily rain	41.9 mm (1.6 in)	24.6 mm (1.0 in)	51 years	45 of 100 (Notable)
25 August 1986	Sao Paulo, BR	monthly rain	69.9 mm (2.8 in)	17.6 mm (0.7 in)	33 years	44 of 100 (Notable)
25 August 1986	Tangancicuaro, MX	monthly low min	1.7 C (35.1 F)	3.9 C (7.0 F)	32 years	44 of 100 (Notable)
25 August 1986	Armagh, GB	daily low max	11.5 C (52.7 F)	1.6 C (2.9 F)	95 years	44 of 100 (Notable)
25 August 1986	Napa State Hospital, US	daily high min	18.9 C (66.0 F)	3.3 C (5.9 F)	72 years	44 of 100 (Notable)
25 August 1986	Adamantina, BR	daily rain	45.7 mm (1.8 in)	40.5 mm (1.6 in)	1 year	43 of 100 (Notable)
25 August 1986	Rothamsted, GB	daily rain	34.1 mm (1.3 in)	12.8 mm (0.5 in)	44 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

1796 to 1986

Records set or tied on this calendar date in each year from 1796 to 1986. 1986 had 778 records.

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

Records on 08-25 in each year
Year	Records
1796	1
1801	1
1802	1
1807	2
1809	1
1813	1
1814	1
1816	1
1818	2
1837	1
1838	2
1839	1
1848	1
1852	1
1855	2
1859	1
1861	2
1864	1
1867	2
1869	1
1870	1
1871	2
1872	2
1875	1
1876	5
1877	3
1879	3
1880	2
1884	1
1885	2
1886	1
1887	1
1889	1
1890	3
1892	4
1893	8
1894	2
1895	4
1896	2
1897	2
1898	2
1899	5
1900	13
1901	11
1902	6
1903	13
1904	11
1905	12
1906	29
1907	15
1908	13
1909	22
1910	32
1911	32
1912	32
1913	31
1914	30
1915	94
1916	18
1917	65
1918	37
1919	172
1920	174
1921	50
1922	70
1923	117
1924	402
1925	145
1926	224
1927	356
1928	167
1929	174
1930	247
1931	251
1932	270
1933	307
1934	457
1935	317
1936	859
1937	333
1938	620
1939	366
1940	658
1941	474
1942	514
1943	496
1944	589
1945	462
1946	305
1947	627
1948	876
1949	281
1950	327
1951	352
1952	585
1953	461
1954	520
1955	711
1956	273
1957	479
1958	958
1959	576
1960	585
1961	487
1962	398
1963	510
1964	557
1965	401
1966	715
1967	439
1968	596
1969	631
1970	721
1971	628
1972	596
1973	537
1974	466
1975	650
1976	459
1977	731
1978	702
1979	828
1980	750
1981	671
1982	907
1983	1,277
1984	694
1985	1,048
1986	778
1987	1,533
1988	815
1989	918
1990	817
1991	688
1992	1,680
1993	1,137
1994	617
1995	1,206
1996	1,058
1997	1,553
1998	1,138
1999	895
2000	790
2001	1,021
2002	1,073
2003	872
2004	947
2005	874
2006	1,020
2007	1,345
2008	1,026
2009	824
2010	1,321
2011	1,332
2012	709
2013	619
2014	853
2015	1,157
2016	887
2017	432
2018	438
2019	708
2020	931
2021	597
2022	672
2023	1,565
2024	909
2025	1,071
2026	886

Download the Data

Data for records on 1986-08-25: 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).

Histogram of margins by which records were beaten on 25 August 1986
Margin	Records
0 to 10	540
10 to 20	81
20 to 30	18
30 to 40	7
40 to 50	1