Weather Records on 31 July 1966

606 weather records were set or tied worldwide on 31 July 1966. Highest significance: Donaldsonville 4 SW, US.

Key Facts for 31 July 1966

On 31 July 1966, 606 weather records were set or tied at long-record stations worldwide.
134 were record highs and 172 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 23 monthly and 579 daily.
Donaldsonville 4 SW set a daily record precipitation of 75.7 mm (3.0 in) on 31 July 1966.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 470 records.

Record Map

606 stations

606 station records on 31 July 1966 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1966: highest significance records shown on the map
Station	Country	Type	Value	Significance
Donaldsonville 4 SW	United States	Record daily precipitation	75.7 mm (3.0 in)	64 of 100 (Major)
Rangely 1E	United States	Record daily precipitation	26.2 mm (1.0 in)	62 of 100 (Major)
Sao Bento Do Una	Brazil	Record daily precipitation	35.4 mm (1.4 in)	57 of 100 (Notable)
Axel	Netherlands	Record daily precipitation	54.1 mm (2.1 in)	53 of 100 (Notable)
Panelas	Brazil	Record daily precipitation	31.8 mm (1.3 in)	52 of 100 (Notable)
De Bilt	Netherlands	Record daily precipitation	39.2 mm (1.5 in)	49 of 100 (Notable)
Intl Falls Intl AP	United States	Record daily precipitation	74.4 mm (2.9 in)	48 of 100 (Notable)
Oran-Hopital Militaire	Algeria	Record low minimum temperature	14.0 C (57.2 F)	47 of 100 (Notable)
Shujalpur	India	Record daily precipitation	133.2 mm (5.2 in)	47 of 100 (Notable)
Agar	India	Record daily precipitation	127.0 mm (5.0 in)	46 of 100 (Notable)
Marradong	Australia	Record daily precipitation	39.9 mm (1.6 in)	45 of 100 (Notable)
Barooga	Australia	Record daily precipitation	30.7 mm (1.2 in)	44 of 100 (Notable)
Arcoverde (Rio Branco)	Brazil	Record daily precipitation	29.3 mm (1.2 in)	44 of 100 (Notable)
Clinton Forestry HQ	United States	Record daily precipitation	71.1 mm (2.8 in)	44 of 100 (Notable)
Vaduj	India	Record daily precipitation	41.0 mm (1.6 in)	43 of 100 (Notable)
Franklin 3 NW	United States	Record daily precipitation	130.3 mm (5.1 in)	43 of 100 (Notable)
Siddapur	India	Record daily precipitation	228.1 mm (9.0 in)	42 of 100 (Notable)
Susner	India	Record daily precipitation	238.8 mm (9.4 in)	41 of 100 (Notable)
Correntes	Brazil	Record daily precipitation	52.8 mm (2.1 in)	40 of 100 (Notable)
Linton	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Tikamgarh	India	Record daily precipitation	106.2 mm (4.2 in)	39 of 100 (Notable)
Sagar	India	Record daily precipitation	181.2 mm (7.1 in)	38 of 100 (Notable)
Madera	United States	Record low maximum temperature	26.1 C (79.0 F)	38 of 100 (Notable)
Hebgen Dam	United States	Record high minimum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Ashley	United States	Record daily precipitation	100.6 mm (4.0 in)	38 of 100 (Notable)
Cowalla	Australia	Record daily precipitation	27.9 mm (1.1 in)	37 of 100 (Notable)
Quebrangulo	Brazil	Record daily precipitation	60.4 mm (2.4 in)	37 of 100 (Notable)
Mulungu (Camarazal)	Brazil	Record daily precipitation	38.3 mm (1.5 in)	36 of 100 (Notable)
Mukteshwar Kumaon	India	Record daily precipitation	57.6 mm (2.3 in)	36 of 100 (Notable)
Hiram	United States	Record low minimum temperature	6.1 C (43.0 F)	36 of 100 (Notable)
Boddington Shire	Australia	Record daily precipitation	33.8 mm (1.3 in)	35 of 100 (Notable)
Oak Hills Station	Australia	Record daily precipitation	25.7 mm (1.0 in)	35 of 100 (Notable)
Adilabad	India	Record daily precipitation	88.9 mm (3.5 in)	35 of 100 (Notable)
Hope 3 NE	United States	Record daily precipitation	52.6 mm (2.1 in)	35 of 100 (Notable)
Harper	United States	Record high minimum temperature	22.2 C (72.0 F)	35 of 100 (Notable)
Kalimpong Obsy Sr	India	Record daily precipitation	123.0 mm (4.8 in)	34 of 100 (Routine)
Union 3 SSE	United States	Record low maximum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
New Orleans Audubon	United States	Record daily precipitation	91.2 mm (3.6 in)	33 of 100 (Routine)
Martinsburg E W Virginia Rgnl	United States	Record low minimum temperature	7.8 C (46.0 F)	33 of 100 (Routine)
Sertania (Alagoa de Baixo)	Brazil	Record daily precipitation	39.4 mm (1.6 in)	31 of 100 (Routine)
Badnawar	India	Record daily precipitation	73.1 mm (2.9 in)	31 of 100 (Routine)
Union Springs 9 S	United States	Record low minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Cordele	United States	Record low minimum temperature	18.9 C (66.0 F)	31 of 100 (Routine)
Rocky Mt	United States	Record daily precipitation	48.3 mm (1.9 in)	31 of 100 (Routine)
Denver WSO City	United States	Record high minimum temperature	24.4 C (75.9 F)	31 of 100 (Routine)
Amos	Canada	Record daily precipitation	43.9 mm (1.7 in)	30 of 100 (Routine)
Galway	Ireland	Record low maximum temperature	14.8 C (58.6 F)	30 of 100 (Routine)
Sanklespur	India	Record daily precipitation	178.8 mm (7.0 in)	30 of 100 (Routine)
Fernandina Beach	United States	Record low maximum temperature	28.9 C (84.0 F)	30 of 100 (Routine)
Challis	United States	Record high maximum temperature	36.7 C (98.1 F)	30 of 100 (Routine)
Wells	United States	Record low maximum temperature	23.3 C (73.9 F)	30 of 100 (Routine)
Emporia 1 WNW	United States	Record daily precipitation	45.2 mm (1.8 in)	30 of 100 (Routine)
Wytheville	United States	Record low minimum temperature	11.7 C (53.1 F)	30 of 100 (Routine)
Hatteras	United States	Record daily precipitation	33.0 mm (1.3 in)	30 of 100 (Routine)
Gingin	Australia	Record daily precipitation	36.3 mm (1.4 in)	29 of 100 (Routine)
Dellyanine	Australia	Record daily precipitation	30.5 mm (1.2 in)	29 of 100 (Routine)
Zjulzja	Russia	Record daily precipitation	25.1 mm (1.0 in)	29 of 100 (Routine)
Mogzon	Russia	Record daily precipitation	34.9 mm (1.4 in)	29 of 100 (Routine)
Placerville	United States	Record low maximum temperature	26.7 C (80.1 F)	29 of 100 (Routine)
Rocklin	United States	Record low maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)

Counts by Type and Timescale

606 records

Records set or tied on 31 July 1966 by type: Highest daily maximum 32, Lowest daily maximum 71, Highest daily minimum 102, Lowest daily minimum 101, Heaviest daily rainfall 300.

Records on 31 July 1966 by type
Record type	Records
Highest daily maximum	32
Lowest daily maximum	71
Highest daily minimum	102
Lowest daily minimum	101
Heaviest daily rainfall	300
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1966 by timescale: all-time 4, monthly 23, daily 579.

How Much Records Were Beaten By

481 broken records

Margins by which the 481 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 117.6. Ties are not counted.

Top 20 by Significance

31 July 1966

Top 20 records on 31 July 1966 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1966	Donaldsonville 4 SW, US	daily rain	75.7 mm (3.0 in)	59.2 mm (2.3 in)	57 years	64 of 100 (Major)
31 July 1966	Rangely 1E, US	daily rain	26.2 mm (1.0 in)	23.2 mm (0.9 in)	56 years	62 of 100 (Major)
31 July 1966	Sao Bento Do Una, BR	daily rain	35.4 mm (1.4 in)	21.9 mm (0.9 in)	44 years	57 of 100 (Notable)
31 July 1966	Axel, NL	daily rain	54.1 mm (2.1 in)	26.6 mm (1.0 in)	27 years	53 of 100 (Notable)
31 July 1966	Panelas, BR	daily rain	31.8 mm (1.3 in)	25.8 mm (1.0 in)	31 years	52 of 100 (Notable)
31 July 1966	De Bilt, NL	daily rain	39.2 mm (1.5 in)	26.1 mm (1.0 in)	12 years	49 of 100 (Notable)
31 July 1966	Intl Falls Intl AP, US	daily rain	74.4 mm (2.9 in)	47.7 mm (1.9 in)	12 years	48 of 100 (Notable)
31 July 1966	Oran-Hopital Militaire, DZ	daily low min	14.0 C (57.2 F)	2.8 C (5.0 F)	81 years	47 of 100 (Notable)
31 July 1966	Shujalpur, IN	daily rain	133.2 mm (5.2 in)	68.9 mm (2.7 in)	63 years	47 of 100 (Notable)
31 July 1966	Agar, IN	daily rain	127.0 mm (5.0 in)	80.0 mm (3.1 in)	43 years	46 of 100 (Notable)
31 July 1966	Marradong, AU	daily rain	39.9 mm (1.6 in)	23.4 mm (0.9 in)	51 years	45 of 100 (Notable)
31 July 1966	Barooga, AU	daily rain	30.7 mm (1.2 in)	19.0 mm (0.7 in)	44 years	44 of 100 (Notable)
31 July 1966	Arcoverde (Rio Branco), BR	daily rain	29.3 mm (1.2 in)	16.0 mm (0.6 in)	48 years	44 of 100 (Notable)
31 July 1966	Clinton Forestry HQ, US	daily rain	71.1 mm (2.8 in)	31.5 mm (1.2 in)	59 years	44 of 100 (Notable)
31 July 1966	Vaduj, IN	daily rain	41.0 mm (1.6 in)	22.2 mm (0.9 in)	35 years	43 of 100 (Notable)
31 July 1966	Franklin 3 NW, US	daily rain	130.3 mm (5.1 in)	40.9 mm (1.6 in)	57 years	43 of 100 (Notable)
31 July 1966	Siddapur, IN	daily rain	228.1 mm (9.0 in)	117.6 mm (4.6 in)	32 years	42 of 100 (Notable)
31 July 1966	Susner, IN	daily rain	238.8 mm (9.4 in)	71.2 mm (2.8 in)	43 years	41 of 100 (Notable)
31 July 1966	Correntes, BR	daily rain	52.8 mm (2.1 in)	29.7 mm (1.2 in)	8 years	40 of 100 (Notable)
31 July 1966	Linton, US	daily rain	38.1 mm (1.5 in)	29.2 mm (1.1 in)	21 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

1804 to 1966

Records set or tied on this calendar date in each year from 1804 to 1966. 1966 had 606 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 1966-07-31: 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 20	446
20 to 40	24
40 to 60	7
60 to 80	2
80 to 100	1
100 to 120	1