Weather Records on 31 August 1999

988 weather records were set or tied worldwide on 31 August 1999. Highest significance: Arlington, US.

Key Facts for 31 August 1999

On 31 August 1999, 988 weather records were set or tied at long-record stations worldwide.
405 were record highs and 433 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 60 monthly and 926 daily.
Arlington set a monthly record low maximum temperature of 16.1 C (61.0 F) on 31 August 1999.
Across 165 earlier years (1796 to 2026) the same calendar date averaged 433 records.

Record Map

988 stations

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

Weather records on 31 August 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Arlington	United States	Record low maximum temperature	16.1 C (61.0 F)	56 of 100 (Notable)
Afton	United States	Record daily precipitation	30.5 mm (1.2 in)	54 of 100 (Notable)
Nevelsk	Russia	Record daily precipitation	78.7 mm (3.1 in)	52 of 100 (Notable)
Britton	United States	Record daily precipitation	64.8 mm (2.6 in)	52 of 100 (Notable)
Pendleton Dwtn	United States	Record low maximum temperature	14.4 C (57.9 F)	50 of 100 (Notable)
San Martin Obispo	Mexico	Record daily precipitation	45.2 mm (1.8 in)	49 of 100 (Notable)
McDermitt	United States	Record low maximum temperature	18.9 C (66.0 F)	48 of 100 (Notable)
Balancan de Dominguez (Dge)	Mexico	Record daily precipitation	124.0 mm (4.9 in)	46 of 100 (Notable)
Caliente	United States	Record daily precipitation	34.3 mm (1.4 in)	45 of 100 (Notable)
Blackville 3 W	United States	Record low minimum temperature	10.0 C (50.0 F)	45 of 100 (Notable)
Moab	United States	Record high minimum temperature	22.2 C (72.0 F)	44 of 100 (Notable)
Wapato	United States	Record low maximum temperature	16.1 C (61.0 F)	44 of 100 (Notable)
Saltville 1N	United States	Record low minimum temperature	7.2 C (45.0 F)	43 of 100 (Notable)
Mapleton Post Office	Australia	Record daily precipitation	30.8 mm (1.2 in)	42 of 100 (Notable)
Mooloolah Post Office	Australia	Record daily precipitation	25.0 mm (1.0 in)	42 of 100 (Notable)
Smithfield	United States	Record low maximum temperature	23.3 C (73.9 F)	42 of 100 (Notable)
Ellensburg	United States	Record low maximum temperature	14.4 C (57.9 F)	42 of 100 (Notable)
Saint Paul Is AP	United States	Record daily precipitation	25.9 mm (1.0 in)	42 of 100 (Notable)
Melbourne Regional Office	Australia	Record high minimum temperature	15.0 C (59.0 F)	41 of 100 (Notable)
Heppner	United States	Record low maximum temperature	14.4 C (57.9 F)	41 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record high maximum temperature	24.0 C (75.2 F)	40 of 100 (Notable)
Cedarville	United States	Record low minimum temperature	0.6 C (33.1 F)	40 of 100 (Notable)
Healdsburg	United States	Record low minimum temperature	3.9 C (39.0 F)	40 of 100 (Notable)
Dayton 1 WSW	United States	Record low maximum temperature	14.4 C (57.9 F)	40 of 100 (Notable)
Pomeroy	United States	Record low minimum temperature	1.1 C (34.0 F)	40 of 100 (Notable)
Portola	United States	Record low maximum temperature	17.2 C (63.0 F)	39 of 100 (Notable)
Marshall	United States	Record daily precipitation	53.6 mm (2.1 in)	39 of 100 (Notable)
Leavenworth 3 S	United States	Record low maximum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Prosser	United States	Record low maximum temperature	16.7 C (62.1 F)	39 of 100 (Notable)
Hopelchen	Mexico	Record daily precipitation	49.8 mm (2.0 in)	38 of 100 (Notable)
Roosevelt 1 S	United States	Record low maximum temperature	29.4 C (84.9 F)	38 of 100 (Notable)
Elizabeth City	United States	Record low maximum temperature	20.6 C (69.1 F)	38 of 100 (Notable)
Snoqualmie Falls	United States	Record low maximum temperature	14.4 C (57.9 F)	38 of 100 (Notable)
Philippi	United States	Record low minimum temperature	7.2 C (45.0 F)	38 of 100 (Notable)
Montville "Craglands"	Australia	Record daily precipitation	36.0 mm (1.4 in)	37 of 100 (Notable)
Urangan Hibiscus St	Australia	Record daily precipitation	39.4 mm (1.6 in)	37 of 100 (Notable)
Bor	Russia	Record daily precipitation	28.3 mm (1.1 in)	37 of 100 (Notable)
Williams	United States	Record low maximum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Ft Bidwell	United States	Record low minimum temperature	-1.1 C (30.0 F)	37 of 100 (Notable)
Greeneville Exp STN	United States	Record low minimum temperature	6.1 C (43.0 F)	37 of 100 (Notable)
Heber	United States	Record high minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Stehekin 4 NW	United States	Record low maximum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Centennial 1NE	United States	Record high minimum temperature	11.7 C (53.1 F)	37 of 100 (Notable)
Huetamo	Mexico	Record low maximum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Toora-Hem	Russia	Record daily precipitation	26.9 mm (1.1 in)	36 of 100 (Notable)
Ekalaka	United States	Record high minimum temperature	21.7 C (71.1 F)	36 of 100 (Notable)
Waynesville 1 E	United States	Record low minimum temperature	5.0 C (41.0 F)	36 of 100 (Notable)
Little Mtn	United States	Record low minimum temperature	11.1 C (52.0 F)	36 of 100 (Notable)
Jacksonville	United States	Record low minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Ashland	United States	Record low minimum temperature	3.3 C (37.9 F)	35 of 100 (Notable)
Lakeview 2 NNW	United States	Record low minimum temperature	-3.3 C (26.1 F)	35 of 100 (Notable)
Flinders Island Airport	Australia	Record high maximum temperature	21.2 C (70.2 F)	34 of 100 (Routine)
Teloloapan	Mexico	Record daily precipitation	45.5 mm (1.8 in)	34 of 100 (Routine)
Mohall	United States	Record high minimum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Bloserville 1 N	United States	Record low maximum temperature	20.6 C (69.1 F)	34 of 100 (Routine)
Eureka WFO Woodley Is	United States	Record low minimum temperature	7.2 C (45.0 F)	34 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record high minimum temperature	16.0 C (60.8 F)	33 of 100 (Routine)
Tepexpan	Mexico	Record high maximum temperature	32.8 C (91.0 F)	33 of 100 (Routine)
Santa Ana (Dge)	Mexico	Record daily precipitation	42.9 mm (1.7 in)	33 of 100 (Routine)
Hat Creek	United States	Record low minimum temperature	-1.1 C (30.0 F)	33 of 100 (Routine)

Counts by Type and Timescale

988 records

Records set or tied on 31 August 1999 by type: Highest daily maximum 200, Lowest daily maximum 212, Highest daily minimum 205, Lowest daily minimum 221, Heaviest daily rainfall 149, Heaviest daily snowfall 1.

Records on 31 August 1999 by type
Record type	Records
Highest daily maximum	200
Lowest daily maximum	212
Highest daily minimum	205
Lowest daily minimum	221
Heaviest daily rainfall	149
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 31 August 1999 by timescale: all-time 2, monthly 60, daily 926.

How Much Records Were Beaten By

705 broken records

Margins by which the 705 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 76.5. Ties are not counted.

Top 20 by Significance

31 August 1999

Top 20 records on 31 August 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 August 1999	Arlington, US	monthly low max	16.1 C (61.0 F)	2.8 C (5.0 F)	100 years	56 of 100 (Notable)
31 August 1999	Afton, US	daily rain	30.5 mm (1.2 in)	26.4 mm (1.0 in)	36 years	54 of 100 (Notable)
31 August 1999	Nevelsk, RU	daily rain	78.7 mm (3.1 in)	48.3 mm (1.9 in)	24 years	52 of 100 (Notable)
31 August 1999	Britton, US	daily rain	64.8 mm (2.6 in)	43.0 mm (1.7 in)	21 years	52 of 100 (Notable)
31 August 1999	Pendleton Dwtn, US	monthly low max	14.4 C (57.9 F)	1.7 C (3.1 F)	91 years	50 of 100 (Notable)
31 August 1999	San Martin Obispo, MX	daily rain	45.2 mm (1.8 in)	35.5 mm (1.4 in)	21 years	49 of 100 (Notable)
31 August 1999	McDermitt, US	daily low max	18.9 C (66.0 F)	5.0 C (9.0 F)	86 years	48 of 100 (Notable)
31 August 1999	Balancan de Dominguez (Dge), MX	daily rain	124.0 mm (4.9 in)	76.5 mm (3.0 in)	8 years	46 of 100 (Notable)
31 August 1999	Caliente, US	daily rain	34.3 mm (1.4 in)	17.8 mm (0.7 in)	36 years	45 of 100 (Notable)
31 August 1999	Blackville 3 W, US	monthly low min	10.0 C (50.0 F)	1.7 C (3.1 F)	57 years	45 of 100 (Notable)
31 August 1999	Moab, US	daily high min	22.2 C (72.0 F)	1.6 C (2.9 F)	100 years	44 of 100 (Notable)
31 August 1999	Wapato, US	monthly low max	16.1 C (61.0 F)	1.1 C (2.0 F)	81 years	44 of 100 (Notable)
31 August 1999	Saltville 1N, US	monthly low min	7.2 C (45.0 F)	0.6 C (1.1 F)	70 years	43 of 100 (Notable)
31 August 1999	Mapleton Post Office, AU	daily rain	30.8 mm (1.2 in)	12.3 mm (0.5 in)	73 years	42 of 100 (Notable)
31 August 1999	Mooloolah Post Office, AU	daily rain	25.0 mm (1.0 in)	4.9 mm (0.19 in)	97 years	42 of 100 (Notable)
31 August 1999	Smithfield, US	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	105 years	42 of 100 (Notable)
31 August 1999	Ellensburg, US	daily low max	14.4 C (57.9 F)	1.2 C (2.2 F)	100 years	42 of 100 (Notable)
31 August 1999	Saint Paul Is AP, US	daily rain	25.9 mm (1.0 in)	6.1 mm (0.24 in)	80 years	42 of 100 (Notable)
31 August 1999	Melbourne Regional Office, AU	daily high min	15.0 C (59.0 F)	1.5 C (2.7 F)	88 years	41 of 100 (Notable)
31 August 1999	Heppner, US	monthly low max	14.4 C (57.9 F)	0.6 C (1.1 F)	67 years	41 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 1999

Records set or tied on this calendar date in each year from 1796 to 1999. 1999 had 988 records.

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

Records on 08-31 in each year
Year	Records
1796	1
1806	1
1807	2
1813	1
1814	1
1816	1
1827	1
1836	1
1846	1
1849	1
1851	1
1856	2
1858	1
1859	1
1860	1
1861	1
1863	1
1867	1
1869	1
1873	1
1875	1
1876	1
1877	2
1879	2
1881	3
1882	2
1885	1
1886	5
1887	1
1889	1
1890	2
1892	3
1893	1
1894	1
1895	1
1896	1
1897	5
1898	10
1899	4
1900	3
1901	5
1902	5
1903	16
1904	13
1905	8
1906	47
1907	6
1908	12
1909	39
1910	20
1911	31
1912	34
1913	40
1914	23
1915	71
1916	7
1917	60
1918	58
1919	25
1920	46
1921	86
1922	58
1923	63
1924	232
1925	111
1926	148
1927	103
1928	201
1929	300
1930	243
1931	192
1932	807
1933	424
1934	381
1935	540
1936	226
1937	508
1938	324
1939	296
1940	400
1941	528
1942	422
1943	650
1944	638
1945	572
1946	545
1947	473
1948	367
1949	409
1950	662
1951	910
1952	388
1953	1,054
1954	633
1955	539
1956	734
1957	317
1958	417
1959	496
1960	366
1961	625
1962	432
1963	415
1964	591
1965	886
1966	830
1967	952
1968	562
1969	474
1970	558
1971	326
1972	287
1973	793
1974	587
1975	658
1976	732
1977	621
1978	891
1979	400
1980	701
1981	692
1982	586
1983	788
1984	866
1985	854
1986	1,218
1987	836
1988	570
1989	622
1990	966
1991	848
1992	1,274
1993	1,286
1994	1,139
1995	1,077
1996	1,451
1997	943
1998	1,163
1999	988
2000	1,545
2001	944
2002	852
2003	1,232
2004	963
2005	1,782
2006	1,147
2007	1,110
2008	870
2009	1,224
2010	1,490
2011	994
2012	932
2013	771
2014	458
2015	1,074
2016	599
2017	596
2018	366
2019	781
2020	737
2021	553
2022	1,191
2023	600
2024	766
2025	307
2026	595

Download the Data

Data for records on 1999-08-31: 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	664
10 to 20	25
20 to 30	10
30 to 40	2
40 to 50	3
50 to 60	0
60 to 70	0
70 to 80	1