Weather Records on 31 July 1991

647 weather records were set or tied worldwide on 31 July 1991. Highest significance: Genoa, IT.

Key Facts for 31 July 1991

On 31 July 1991, 647 weather records were set or tied at long-record stations worldwide.
287 were record highs and 163 were record lows, counting maximum and minimum temperature.
By timescale, 9 were all-time records, 23 monthly and 615 daily.
Genoa set a daily record precipitation of 98.6 mm (3.9 in) on 31 July 1991.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 470 records.

Record Map

647 stations

647 station records on 31 July 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Genoa	Italy	Record daily precipitation	98.6 mm (3.9 in)	64 of 100 (Major)
Garema	Australia	Record daily precipitation	42.0 mm (1.7 in)	59 of 100 (Notable)
Volochanka	Russia	Record daily precipitation	32.0 mm (1.3 in)	54 of 100 (Notable)
Hularin	Russia	Record daily precipitation	64.8 mm (2.6 in)	54 of 100 (Notable)
Idyllwild Fire Dept	United States	Record daily precipitation	38.1 mm (1.5 in)	51 of 100 (Notable)
Gateway 1ENE	United States	Record high minimum temperature	30.6 C (87.1 F)	51 of 100 (Notable)
Presa la Angostura	Mexico	Record daily precipitation	47.5 mm (1.9 in)	50 of 100 (Notable)
Aldersbach-Kriestorf	Germany	Record daily precipitation	117.5 mm (4.6 in)	49 of 100 (Notable)
Duki	Russia	Record daily precipitation	51.3 mm (2.0 in)	49 of 100 (Notable)
Nieuwoudville (Pol)	South Africa	Record daily precipitation	34.0 mm (1.3 in)	49 of 100 (Notable)
Barstow-Daggett AP	United States	Record daily precipitation	39.9 mm (1.6 in)	48 of 100 (Notable)
Muhldorf	Germany	Record daily precipitation	80.7 mm (3.2 in)	47 of 100 (Notable)
Simbach/Inn	Germany	Record daily precipitation	114.2 mm (4.5 in)	47 of 100 (Notable)
Woodstock	United States	Record daily precipitation	103.6 mm (4.1 in)	47 of 100 (Notable)
Jornada Exp Range	United States	Record daily precipitation	25.1 mm (1.0 in)	46 of 100 (Notable)
Zharyk	Kazakhstan	Record daily precipitation	50.6 mm (2.0 in)	45 of 100 (Notable)
Eichstatt-Landershofen	Germany	Record daily precipitation	38.1 mm (1.5 in)	44 of 100 (Notable)
Parsberg/Oberpfalz-Eglwang	Germany	Record daily precipitation	50.8 mm (2.0 in)	44 of 100 (Notable)
Nurnberg	Germany	Record daily precipitation	36.2 mm (1.4 in)	43 of 100 (Notable)
Shelbyville 1 E	United States	Record low minimum temperature	8.9 C (48.0 F)	42 of 100 (Notable)
Farmville	United States	Record low maximum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Veselaja Gorka	Russia	Record daily precipitation	46.8 mm (1.8 in)	41 of 100 (Notable)
Big Bear Lake	United States	Record daily precipitation	31.5 mm (1.2 in)	41 of 100 (Notable)
Iron Mtn	United States	Record low minimum temperature	16.7 C (62.1 F)	41 of 100 (Notable)
Sunnyside - Lund 31S	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
San Martin Chalchicuautla	Mexico	Record low minimum temperature	15.6 C (60.1 F)	40 of 100 (Notable)
Kr.Rottal-Inn Falkenberg	Germany	Record daily precipitation	69.0 mm (2.7 in)	39 of 100 (Notable)
Naalehu 14	United States	Record low maximum temperature	23.9 C (75.0 F)	39 of 100 (Notable)
Wasserburg	Germany	Record daily precipitation	80.4 mm (3.2 in)	38 of 100 (Notable)
Bel'cy	Moldova	Record daily precipitation	82.2 mm (3.2 in)	38 of 100 (Notable)
Donetsk	Ukraine	Record daily precipitation	112.0 mm (4.4 in)	38 of 100 (Notable)
Mina	United States	Record high minimum temperature	22.8 C (73.0 F)	38 of 100 (Notable)
Tajgonos	Russia	Record high maximum temperature	26.4 C (79.5 F)	37 of 100 (Notable)
Jacksonville Beach	United States	Record daily precipitation	63.5 mm (2.5 in)	37 of 100 (Notable)
Rinconada	Mexico	Record high minimum temperature	25.6 C (78.1 F)	36 of 100 (Notable)
Kirovohrad	Ukraine	Record daily precipitation	32.0 mm (1.3 in)	36 of 100 (Notable)
Seward AP	United States	Record low maximum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Kornesty	Moldova	Record daily precipitation	45.8 mm (1.8 in)	35 of 100 (Notable)
Berezovo	Russia	Record daily precipitation	53.6 mm (2.1 in)	35 of 100 (Notable)
Wauchula	United States	Record daily precipitation	51.3 mm (2.0 in)	35 of 100 (Notable)
Kosching	Germany	Record daily precipitation	37.8 mm (1.5 in)	34 of 100 (Routine)
Trostberg	Germany	Record daily precipitation	72.5 mm (2.9 in)	34 of 100 (Routine)
Hanford 1 S	United States	Record high minimum temperature	23.3 C (73.9 F)	34 of 100 (Routine)
Kern River Ph 1	United States	Record high minimum temperature	30.0 C (86.0 F)	34 of 100 (Routine)
Pancas	Brazil	Record daily precipitation	55.0 mm (2.2 in)	33 of 100 (Routine)
Regensburg	Germany	Record daily precipitation	34.4 mm (1.4 in)	33 of 100 (Routine)
Tenosique (Smn)	Mexico	Record high maximum temperature	38.3 C (100.9 F)	32 of 100 (Routine)
Vladikavkaz	Russia	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Visalia	United States	Record high minimum temperature	24.4 C (75.9 F)	32 of 100 (Routine)
Bushnell 1 E	United States	Record daily precipitation	55.9 mm (2.2 in)	32 of 100 (Routine)
San Lucas Ojitlan	Mexico	Record low minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Dzilam de Bravo	Mexico	Record low minimum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Jubilejnaja	Russia	Record high minimum temperature	16.9 C (62.4 F)	31 of 100 (Routine)
Metter	United States	Record daily precipitation	47.5 mm (1.9 in)	31 of 100 (Routine)
Socorro	United States	Record low maximum temperature	25.0 C (77.0 F)	31 of 100 (Routine)
Atil	Mexico	Record low minimum temperature	10.6 C (51.1 F)	30 of 100 (Routine)
Tajgonos	Russia	Record high minimum temperature	15.8 C (60.4 F)	30 of 100 (Routine)
Anapa	Russia	Record high minimum temperature	25.7 C (78.3 F)	30 of 100 (Routine)
Maricopa	United States	Record high maximum temperature	45.6 C (114.1 F)	30 of 100 (Routine)
Nahunta 6NE	United States	Record daily precipitation	59.2 mm (2.3 in)	30 of 100 (Routine)

Counts by Type and Timescale

647 records

Records set or tied on 31 July 1991 by type: Highest daily maximum 132, Lowest daily maximum 77, Highest daily minimum 155, Lowest daily minimum 86, Heaviest daily rainfall 197.

Records on 31 July 1991 by type
Record type	Records
Highest daily maximum	132
Lowest daily maximum	77
Highest daily minimum	155
Lowest daily minimum	86
Heaviest daily rainfall	197
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1991 by timescale: all-time 9, monthly 23, daily 615.

How Much Records Were Beaten By

477 broken records

Margins by which the 477 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.8. Ties are not counted.

Top 20 by Significance

31 July 1991

Top 20 records on 31 July 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1991	Genoa, IT	daily rain	98.6 mm (3.9 in)	47.3 mm (1.9 in)	73 years	64 of 100 (Major)
31 July 1991	Garema, AU	daily rain	42.0 mm (1.7 in)	28.8 mm (1.1 in)	48 years	59 of 100 (Notable)
31 July 1991	Volochanka, RU	daily rain	32.0 mm (1.3 in)	19.2 mm (0.8 in)	38 years	54 of 100 (Notable)
31 July 1991	Hularin, RU	daily rain	64.8 mm (2.6 in)	44.7 mm (1.8 in)	34 years	54 of 100 (Notable)
31 July 1991	Idyllwild Fire Dept, US	daily rain	38.1 mm (1.5 in)	36.8 mm (1.4 in)	36 years	51 of 100 (Notable)
31 July 1991	Gateway 1ENE, US	all-time high min	30.6 C (87.1 F)	5.6 C (10.1 F)	33 years	51 of 100 (Notable)
31 July 1991	Presa la Angostura, MX	daily rain	47.5 mm (1.9 in)	29.0 mm (1.1 in)	50 years	50 of 100 (Notable)
31 July 1991	Aldersbach-Kriestorf, DE	all-time rain	117.5 mm (4.6 in)	6.3 mm (0.25 in)	56 years	49 of 100 (Notable)
31 July 1991	Duki, RU	daily rain	51.3 mm (2.0 in)	39.2 mm (1.5 in)	21 years	49 of 100 (Notable)
31 July 1991	Nieuwoudville (Pol), ZA	daily rain	34.0 mm (1.3 in)	18.8 mm (0.7 in)	82 years	49 of 100 (Notable)
31 July 1991	Barstow-Daggett AP, US	daily rain	39.9 mm (1.6 in)	24.7 mm (1.0 in)	36 years	48 of 100 (Notable)
31 July 1991	Muhldorf, DE	daily rain	80.7 mm (3.2 in)	56.1 mm (2.2 in)	13 years	47 of 100 (Notable)
31 July 1991	Simbach/Inn, DE	all-time rain	114.2 mm (4.5 in)	13.7 mm (0.5 in)	37 years	47 of 100 (Notable)
31 July 1991	Woodstock, US	daily rain	103.6 mm (4.1 in)	65.8 mm (2.6 in)	6 years	47 of 100 (Notable)
31 July 1991	Jornada Exp Range, US	daily rain	25.1 mm (1.0 in)	14.2 mm (0.6 in)	72 years	46 of 100 (Notable)
31 July 1991	Zharyk, KZ	all-time rain	50.6 mm (2.0 in)	5.0 mm (0.20 in)	38 years	45 of 100 (Notable)
31 July 1991	Eichstatt-Landershofen, DE	daily rain	38.1 mm (1.5 in)	21.6 mm (0.9 in)	30 years	44 of 100 (Notable)
31 July 1991	Parsberg/Oberpfalz-Eglwang, DE	daily rain	50.8 mm (2.0 in)	34.3 mm (1.4 in)	0 years	44 of 100 (Notable)
31 July 1991	Nurnberg, DE	daily rain	36.2 mm (1.4 in)	9.8 mm (0.39 in)	64 years	43 of 100 (Notable)
31 July 1991	Shelbyville 1 E, US	daily low min	8.9 C (48.0 F)	1.7 C (3.1 F)	95 years	42 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 1991

Records set or tied on this calendar date in each year from 1804 to 1991. 1991 had 647 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 1991-07-31: 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	407
10 to 20	41
20 to 30	12
30 to 40	11
40 to 50	4
50 to 60	1
60 to 70	1