Weather Records on 31 July 1986

1,021 weather records were set or tied worldwide on 31 July 1986. Highest significance: Rockdale, US.

Key Facts for 31 July 1986

On 31 July 1986, 1,021 weather records were set or tied at long-record stations worldwide.
625 were record highs and 215 were record lows, counting maximum and minimum temperature.
By timescale, 22 were all-time records, 25 monthly and 974 daily.
Rockdale set a monthly record daily precipitation of 93.0 mm (3.7 in) on 31 July 1986.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 468 records.

Record Map

1,021 stations

1,021 station records on 31 July 1986 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1986: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rockdale	United States	Record daily precipitation	93.0 mm (3.7 in)	63 of 100 (Major)
E Stroudsburg	United States	Record daily precipitation	94.5 mm (3.7 in)	54 of 100 (Notable)
Lafayette Rgnl AP	United States	Record high minimum temperature	27.8 C (82.0 F)	54 of 100 (Notable)
Galesburg	United States	Record daily precipitation	104.6 mm (4.1 in)	52 of 100 (Notable)
Bogotol	Russia	Record daily precipitation	50.9 mm (2.0 in)	49 of 100 (Notable)
Washington 1 W	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Umlaas Waterworks	South Africa	Record daily precipitation	35.0 mm (1.4 in)	46 of 100 (Notable)
Boonville 4 SSW	United States	Record daily precipitation	49.5 mm (1.9 in)	46 of 100 (Notable)
Hammond	United States	Record high minimum temperature	25.6 C (78.1 F)	44 of 100 (Notable)
Batesville	United States	Record high maximum temperature	41.1 C (106.0 F)	44 of 100 (Notable)
Orono	United States	Record low maximum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Plainfield	United States	Record daily precipitation	44.2 mm (1.7 in)	43 of 100 (Notable)
Fayetteville Exp STN	United States	Record high maximum temperature	41.7 C (107.1 F)	42 of 100 (Notable)
Morrilton	United States	Record high maximum temperature	46.1 C (115.0 F)	41 of 100 (Notable)
Danbury	United States	Record daily precipitation	63.5 mm (2.5 in)	41 of 100 (Notable)
High Springs	United States	Record high maximum temperature	41.7 C (107.1 F)	41 of 100 (Notable)
Tuscola	United States	Record daily precipitation	74.9 mm (2.9 in)	41 of 100 (Notable)
Canton 4N	United States	Record high maximum temperature	40.0 C (104.0 F)	41 of 100 (Notable)
Stevenson Dam	United States	Record daily precipitation	89.4 mm (3.5 in)	40 of 100 (Notable)
Cemal	Russia	Record daily precipitation	36.4 mm (1.4 in)	39 of 100 (Notable)
Greensboro	United States	Record high maximum temperature	38.9 C (102.0 F)	39 of 100 (Notable)
Douglas	United States	Record high maximum temperature	39.4 C (102.9 F)	39 of 100 (Notable)
Unalakleet Fld	United States	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Evergreen	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Troy	United States	Record high minimum temperature	26.1 C (79.0 F)	38 of 100 (Notable)
Thomasville 7 NE	United States	Record high minimum temperature	25.0 C (77.0 F)	38 of 100 (Notable)
Hernando	United States	Record high maximum temperature	39.4 C (102.9 F)	38 of 100 (Notable)
Nitta Yuma	United States	Record high minimum temperature	25.6 C (78.1 F)	38 of 100 (Notable)
Highmarket 2W	United States	Record daily precipitation	39.4 mm (1.6 in)	38 of 100 (Notable)
Prattsville	United States	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Eufaula 6 SSW	United States	Record high minimum temperature	28.3 C (82.9 F)	38 of 100 (Notable)
New Orleans Audubon	United States	Record high maximum temperature	36.7 C (98.1 F)	38 of 100 (Notable)
Abilene	United States	Record high maximum temperature	41.7 C (107.1 F)	37 of 100 (Notable)
Crowley 2 NE	United States	Record high maximum temperature	37.8 C (100.0 F)	37 of 100 (Notable)
Hammond	United States	Record high maximum temperature	37.8 C (100.0 F)	37 of 100 (Notable)
Laurel	United States	Record high maximum temperature	38.3 C (100.9 F)	37 of 100 (Notable)
Greeneville Exp STN	United States	Record low minimum temperature	13.3 C (55.9 F)	37 of 100 (Notable)
Paris	United States	Record high minimum temperature	26.7 C (80.1 F)	37 of 100 (Notable)
Fairhope 2 NE	United States	Record high maximum temperature	37.8 C (100.0 F)	36 of 100 (Notable)
Highland Home	United States	Record high maximum temperature	37.2 C (99.0 F)	36 of 100 (Notable)
Duncan	United States	Record high maximum temperature	41.1 C (106.0 F)	36 of 100 (Notable)
Marianna 2 S	United States	Record high maximum temperature	40.6 C (105.1 F)	36 of 100 (Notable)
Ozark	United States	Record high maximum temperature	42.8 C (109.0 F)	36 of 100 (Notable)
Albany 3 SE	United States	Record high maximum temperature	38.9 C (102.0 F)	36 of 100 (Notable)
Blakely	United States	Record high maximum temperature	40.0 C (104.0 F)	36 of 100 (Notable)
Waycross 4 NE	United States	Record high maximum temperature	38.3 C (100.9 F)	36 of 100 (Notable)
Crystal Springs Exp STN	United States	Record high maximum temperature	38.3 C (100.9 F)	36 of 100 (Notable)
Lowville	United States	Record daily precipitation	36.3 mm (1.4 in)	36 of 100 (Notable)
Bolivar Wtr Wks	United States	Record high minimum temperature	25.0 C (77.0 F)	36 of 100 (Notable)
Humacao 2 SSE	Puerto Rico [United States]	Record daily precipitation	59.4 mm (2.3 in)	35 of 100 (Notable)
Gardiner	United States	Record low maximum temperature	16.7 C (62.1 F)	35 of 100 (Notable)
Nitta Yuma	United States	Record high maximum temperature	41.1 C (106.0 F)	35 of 100 (Notable)
Locke 2 W	United States	Record daily precipitation	45.2 mm (1.8 in)	35 of 100 (Notable)
Kremsmuenster	Austria	Record high maximum temperature	30.9 C (87.6 F)	34 of 100 (Routine)
Enisejsk	Russia	Record high minimum temperature	19.1 C (66.4 F)	34 of 100 (Routine)
Haleyville	United States	Record high minimum temperature	22.8 C (73.0 F)	34 of 100 (Routine)
Presque Isle	United States	Record low maximum temperature	16.1 C (61.0 F)	34 of 100 (Routine)
New Bedford Coop	United States	Record low maximum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Calhoun City	United States	Record high maximum temperature	39.4 C (102.9 F)	34 of 100 (Routine)
Pontotoc Exp STN	United States	Record high maximum temperature	40.6 C (105.1 F)	34 of 100 (Routine)

Counts by Type and Timescale

1,021 records

Records set or tied on 31 July 1986 by type: Highest daily maximum 432, Lowest daily maximum 77, Highest daily minimum 193, Lowest daily minimum 138, Heaviest daily rainfall 181.

Records on 31 July 1986 by type
Record type	Records
Highest daily maximum	432
Lowest daily maximum	77
Highest daily minimum	193
Lowest daily minimum	138
Heaviest daily rainfall	181
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1986 by timescale: all-time 22, monthly 25, daily 974.

How Much Records Were Beaten By

733 broken records

Margins by which the 733 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.3. Ties are not counted.

Top 20 by Significance

31 July 1986

Top 20 records on 31 July 1986 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1986	Rockdale, US	monthly rain	93.0 mm (3.7 in)	39.7 mm (1.6 in)	34 years	63 of 100 (Major)
31 July 1986	E Stroudsburg, US	daily rain	94.5 mm (3.7 in)	65.3 mm (2.6 in)	24 years	54 of 100 (Notable)
31 July 1986	Lafayette Rgnl AP, US	all-time high min	27.8 C (82.0 F)	0.6 C (1.1 F)	71 years	54 of 100 (Notable)
31 July 1986	Galesburg, US	daily rain	104.6 mm (4.1 in)	49.0 mm (1.9 in)	48 years	52 of 100 (Notable)
31 July 1986	Bogotol, RU	daily rain	50.9 mm (2.0 in)	37.7 mm (1.5 in)	16 years	49 of 100 (Notable)
31 July 1986	Washington 1 W, US	daily rain	50.8 mm (2.0 in)	35.6 mm (1.4 in)	48 years	49 of 100 (Notable)
31 July 1986	Umlaas Waterworks, ZA	daily rain	35.0 mm (1.4 in)	33.0 mm (1.3 in)	45 years	46 of 100 (Notable)
31 July 1986	Boonville 4 SSW, US	daily rain	49.5 mm (1.9 in)	38.8 mm (1.5 in)	32 years	46 of 100 (Notable)
31 July 1986	Hammond, US	daily high min	25.6 C (78.1 F)	1.7 C (3.1 F)	80 years	44 of 100 (Notable)
31 July 1986	Batesville, US	daily high max	41.1 C (106.0 F)	2.8 C (5.0 F)	89 years	44 of 100 (Notable)
31 July 1986	Orono, US	daily low max	15.6 C (60.1 F)	3.3 C (5.9 F)	86 years	43 of 100 (Notable)
31 July 1986	Plainfield, US	daily rain	44.2 mm (1.7 in)	36.1 mm (1.4 in)	36 years	43 of 100 (Notable)
31 July 1986	Fayetteville Exp STN, US	daily high max	41.7 C (107.1 F)	2.3 C (4.1 F)	89 years	42 of 100 (Notable)
31 July 1986	Morrilton, US	all-time high max	46.1 C (115.0 F)	0.5 C (0.9 F)	49 years	41 of 100 (Notable)
31 July 1986	Danbury, US	daily rain	63.5 mm (2.5 in)	32.0 mm (1.3 in)	44 years	41 of 100 (Notable)
31 July 1986	High Springs, US	all-time high max	41.7 C (107.1 F)	1.7 C (3.1 F)	36 years	41 of 100 (Notable)
31 July 1986	Tuscola, US	daily rain	74.9 mm (2.9 in)	21.1 mm (0.8 in)	60 years	41 of 100 (Notable)
31 July 1986	Canton 4N, US	daily high max	40.0 C (104.0 F)	1.7 C (3.1 F)	89 years	41 of 100 (Notable)
31 July 1986	Stevenson Dam, US	monthly rain	89.4 mm (3.5 in)	21.3 mm (0.8 in)	11 years	40 of 100 (Notable)
31 July 1986	Cemal, RU	daily rain	36.4 mm (1.4 in)	17.2 mm (0.7 in)	31 years	39 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

1804 to 1986

Records set or tied on this calendar date in each year from 1804 to 1986. 1986 had 1,021 records.

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

Records on 07-31 in each year
Year	Records
1804	1
1815	1
1816	1
1828	1
1834	1
1839	1
1840	1
1841	2
1851	1
1858	2
1860	4
1863	1
1866	1
1873	2
1876	1
1879	1
1884	1
1885	1
1886	1
1887	5
1889	2
1890	2
1891	1
1892	1
1893	3
1894	2
1896	2
1897	2
1898	5
1900	1
1901	3
1902	4
1903	16
1904	12
1905	10
1906	14
1907	17
1908	22
1909	15
1910	21
1911	29
1912	14
1913	31
1914	28
1915	71
1916	63
1917	126
1918	39
1919	27
1920	168
1921	112
1922	24
1923	236
1924	97
1925	349
1926	226
1927	161
1928	145
1929	134
1930	143
1931	441
1932	314
1933	504
1934	449
1935	418
1936	548
1937	297
1938	417
1939	357
1940	415
1941	323
1942	342
1943	342
1944	312
1945	499
1946	426
1947	341
1948	341
1949	406
1950	511
1951	364
1952	472
1953	414
1954	459
1955	813
1956	574
1957	268
1958	374
1959	424
1960	622
1961	504
1962	348
1963	294
1964	637
1965	858
1966	606
1967	326
1968	637
1969	440
1970	576
1971	1,850
1972	667
1973	583
1974	363
1975	1,386
1976	530
1977	543
1978	754
1979	501
1980	1,047
1981	672
1982	767
1983	901
1984	777
1985	1,065
1986	1,021
1987	934
1988	940
1989	1,753
1990	911
1991	647
1992	1,169
1993	1,031
1994	1,207
1995	1,223
1996	1,084
1997	984
1998	1,195
1999	1,643
2000	1,001
2001	1,414
2002	1,080
2003	1,157
2004	779
2005	742
2006	1,405
2007	1,023
2008	911
2009	1,156
2010	1,485
2011	1,040
2012	712
2013	469
2014	1,000
2015	948
2016	501
2017	485
2018	1,135
2019	551
2020	1,034
2021	1,020
2022	861
2023	671
2024	748
2025	836
2026	754

Download the Data

Data for records on 1986-07-31: 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 10	687
10 to 20	23
20 to 30	8
30 to 40	12
40 to 50	1
50 to 60	1
60 to 70	1