Weather Records on 31 July 1999

1,643 weather records were set or tied worldwide on 31 July 1999. Highest significance: Brjansk, RU.

Key Facts for 31 July 1999

On 31 July 1999, 1,643 weather records were set or tied at long-record stations worldwide.
1,264 were record highs and 201 were record lows, counting maximum and minimum temperature.
By timescale, 36 were all-time records, 32 monthly and 1,575 daily.
Brjansk set an all-time record daily precipitation of 119.2 mm (4.7 in) on 31 July 1999.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 464 records.

Record Map

1,643 stations

1,643 station records on 31 July 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brjansk	Russia	Record daily precipitation	119.2 mm (4.7 in)	69 of 100 (Major)
Snake Creek Powerhouse	United States	Record daily precipitation	34.8 mm (1.4 in)	68 of 100 (Major)
Montrose #2	United States	Record daily precipitation	27.9 mm (1.1 in)	66 of 100 (Major)
Hardy	United States	Record daily precipitation	69.9 mm (2.8 in)	61 of 100 (Major)
Potter	United States	Record daily precipitation	53.3 mm (2.1 in)	59 of 100 (Notable)
Scipio	United States	Record low maximum temperature	20.6 C (69.1 F)	58 of 100 (Notable)
Corozal Substn	Puerto Rico [United States]	Record daily precipitation	99.3 mm (3.9 in)	56 of 100 (Notable)
Colorado Springs Muni AP	United States	Record daily precipitation	59.9 mm (2.4 in)	53 of 100 (Notable)
Blagovescensk	Russia	Record daily precipitation	55.9 mm (2.2 in)	52 of 100 (Notable)
Deland 1 SSE	United States	Record high minimum temperature	26.1 C (79.0 F)	51 of 100 (Notable)
Spring Grove	United States	Record daily precipitation	75.4 mm (3.0 in)	51 of 100 (Notable)
Westfield 2 SSE	United States	Record high maximum temperature	37.2 C (99.0 F)	50 of 100 (Notable)
Dayton Mcd	United States	Record high minimum temperature	28.3 C (82.9 F)	50 of 100 (Notable)
Saint Bernard	United States	Record high minimum temperature	26.7 C (80.1 F)	48 of 100 (Notable)
Bartow 1SE	United States	Record high minimum temperature	26.1 C (79.0 F)	48 of 100 (Notable)
Bell Ranch	United States	Record daily precipitation	31.8 mm (1.3 in)	47 of 100 (Notable)
Carrizozo 1SW	United States	Record low minimum temperature	3.9 C (39.0 F)	47 of 100 (Notable)
Hatteras	United States	Record high minimum temperature	27.8 C (82.0 F)	47 of 100 (Notable)
Monticello Muni AP	United States	Record high minimum temperature	25.6 C (78.1 F)	47 of 100 (Notable)
Danville	United States	Record high minimum temperature	26.1 C (79.0 F)	46 of 100 (Notable)
Hesperia 4 WNW	United States	Record high maximum temperature	35.6 C (96.1 F)	46 of 100 (Notable)
Hillsboro	United States	Record high minimum temperature	24.4 C (75.9 F)	46 of 100 (Notable)
Upton	United States	Record daily precipitation	25.4 mm (1.0 in)	46 of 100 (Notable)
Neutla	Mexico	Record daily precipitation	63.8 mm (2.5 in)	45 of 100 (Notable)
Wewahitchka	United States	Record high minimum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
Bedford	United States	Record daily precipitation	94.2 mm (3.7 in)	45 of 100 (Notable)
Jefferson City Wtp	United States	Record high minimum temperature	26.1 C (79.0 F)	45 of 100 (Notable)
Dwtn Charleston	United States	Record high minimum temperature	28.9 C (84.0 F)	45 of 100 (Notable)
Salem	United States	Record high minimum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Greensburg	United States	Record high minimum temperature	25.6 C (78.1 F)	43 of 100 (Notable)
Osceola	United States	Record daily precipitation	90.4 mm (3.6 in)	43 of 100 (Notable)
Waverly	United States	Record high minimum temperature	23.9 C (75.0 F)	43 of 100 (Notable)
Castlewood	United States	Record daily precipitation	60.5 mm (2.4 in)	43 of 100 (Notable)
Shawano 2SSW	United States	Record daily precipitation	44.7 mm (1.8 in)	43 of 100 (Notable)
Orlando Executive AP	United States	Record high minimum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Presa Taxhimay	Mexico	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Kit Carson	United States	Record daily precipitation	61.0 mm (2.4 in)	42 of 100 (Notable)
Saint Leo	United States	Record high maximum temperature	36.7 C (98.1 F)	42 of 100 (Notable)
Carrollton Lock 1	United States	Record high maximum temperature	38.9 C (102.0 F)	42 of 100 (Notable)
Adrian 2 NNE	United States	Record high minimum temperature	23.9 C (75.0 F)	42 of 100 (Notable)
Melrose	United States	Record daily precipitation	57.2 mm (2.3 in)	42 of 100 (Notable)
Windsor	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Cape May 2 NW	United States	Record high minimum temperature	23.9 C (75.0 F)	42 of 100 (Notable)
Orenburg	Russia	Record high minimum temperature	23.4 C (74.1 F)	41 of 100 (Notable)
Bloomington Indiana UNIV	United States	Record high maximum temperature	40.0 C (104.0 F)	41 of 100 (Notable)
Greenfield	United States	Record high maximum temperature	38.9 C (102.0 F)	41 of 100 (Notable)
De Ridder	United States	Record high minimum temperature	26.1 C (79.0 F)	41 of 100 (Notable)
Hillsboro	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Millersburg	United States	Record daily precipitation	48.8 mm (1.9 in)	41 of 100 (Notable)
Beaver Dam Wwtp	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Medford	United States	Record high maximum temperature	35.0 C (95.0 F)	41 of 100 (Notable)
Sparta	United States	Record high maximum temperature	37.8 C (100.0 F)	41 of 100 (Notable)
Allende	Mexico	Record high minimum temperature	27.8 C (82.0 F)	40 of 100 (Notable)
Antioch	United States	Record high maximum temperature	37.8 C (100.0 F)	40 of 100 (Notable)
Wheaton 3 SE	United States	Record high maximum temperature	40.0 C (104.0 F)	40 of 100 (Notable)
Sharon Springs	United States	Record daily precipitation	25.9 mm (1.0 in)	40 of 100 (Notable)
Ashland	United States	Record high maximum temperature	40.0 C (104.0 F)	40 of 100 (Notable)
Morganton	United States	Record high maximum temperature	38.9 C (102.0 F)	40 of 100 (Notable)
Merrill	United States	Record daily precipitation	42.9 mm (1.7 in)	40 of 100 (Notable)
Taiyuan	China	Record high minimum temperature	25.1 C (77.2 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,643 records

Records set or tied on 31 July 1999 by type: Highest daily maximum 658, Lowest daily maximum 69, Highest daily minimum 606, Lowest daily minimum 132, Heaviest daily rainfall 178.

Records on 31 July 1999 by type
Record type	Records
Highest daily maximum	658
Lowest daily maximum	69
Highest daily minimum	606
Lowest daily minimum	132
Heaviest daily rainfall	178
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1999 by timescale: all-time 36, monthly 32, daily 1,575.

How Much Records Were Beaten By

1,165 broken records

Margins by which the 1,165 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 66.3. Ties are not counted.

Top 20 by Significance

31 July 1999

Top 20 records on 31 July 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1999	Brjansk, RU	all-time rain	119.2 mm (4.7 in)	46.9 mm (1.8 in)	11 years	69 of 100 (Major)
31 July 1999	Snake Creek Powerhouse, US	daily rain	34.8 mm (1.4 in)	26.2 mm (1.0 in)	68 years	68 of 100 (Major)
31 July 1999	Montrose #2, US	daily rain	27.9 mm (1.1 in)	13.9 mm (0.5 in)	77 years	66 of 100 (Major)
31 July 1999	Hardy, US	daily rain	69.9 mm (2.8 in)	51.9 mm (2.0 in)	44 years	61 of 100 (Major)
31 July 1999	Potter, US	daily rain	53.3 mm (2.1 in)	34.2 mm (1.3 in)	60 years	59 of 100 (Notable)
31 July 1999	Scipio, US	daily low max	20.6 C (69.1 F)	6.6 C (11.9 F)	86 years	58 of 100 (Notable)
31 July 1999	Corozal Substn, PR	daily rain	99.3 mm (3.9 in)	66.3 mm (2.6 in)	33 years	56 of 100 (Notable)
31 July 1999	Colorado Springs Muni AP, US	daily rain	59.9 mm (2.4 in)	37.5 mm (1.5 in)	26 years	53 of 100 (Notable)
31 July 1999	Blagovescensk, RU	daily rain	55.9 mm (2.2 in)	16.1 mm (0.6 in)	109 years	52 of 100 (Notable)
31 July 1999	Deland 1 SSE, US	daily high min	26.1 C (79.0 F)	1.7 C (3.1 F)	99 years	51 of 100 (Notable)
31 July 1999	Spring Grove, US	daily rain	75.4 mm (3.0 in)	43.1 mm (1.7 in)	60 years	51 of 100 (Notable)
31 July 1999	Westfield 2 SSE, US	monthly high max	37.2 C (99.0 F)	1.6 C (2.9 F)	88 years	50 of 100 (Notable)
31 July 1999	Dayton Mcd, US	all-time high min	28.3 C (82.9 F)	0.5 C (0.9 F)	65 years	50 of 100 (Notable)
31 July 1999	Saint Bernard, US	daily high min	26.7 C (80.1 F)	4.5 C (8.1 F)	65 years	48 of 100 (Notable)
31 July 1999	Bartow 1SE, US	daily high min	26.1 C (79.0 F)	1.1 C (2.0 F)	102 years	48 of 100 (Notable)
31 July 1999	Bell Ranch, US	daily rain	31.8 mm (1.3 in)	10.2 mm (0.4 in)	93 years	47 of 100 (Notable)
31 July 1999	Carrizozo 1SW, US	monthly low min	3.9 C (39.0 F)	0.5 C (0.9 F)	88 years	47 of 100 (Notable)
31 July 1999	Hatteras, US	daily high min	27.8 C (82.0 F)	1.7 C (3.1 F)	97 years	47 of 100 (Notable)
31 July 1999	Monticello Muni AP, US	daily high min	25.6 C (78.1 F)	1.7 C (3.1 F)	115 years	47 of 100 (Notable)
31 July 1999	Danville, US	all-time high min	26.1 C (79.0 F)	0.5 C (0.9 F)	65 years	46 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 1999

Records set or tied on this calendar date in each year from 1804 to 1999. 1999 had 1,643 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 1999-07-31: 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	1,094
10 to 20	42
20 to 30	14
30 to 40	9
40 to 50	4
50 to 60	1
60 to 70	1