Weather Records on 12 August 1999

1,325 weather records were set or tied worldwide on 12 August 1999. Highest significance: Mc Clusky, US.

Key Facts for 12 August 1999

On 12 August 1999, 1,325 weather records were set or tied at long-record stations worldwide.
751 were record highs and 318 were record lows, counting maximum and minimum temperature.
By timescale, 10 were all-time records, 54 monthly and 1,261 daily.
Mc Clusky set a monthly record daily precipitation of 102.1 mm (4.0 in) on 12 August 1999.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 442 records.

Record Map

1,325 stations

1,325 station records on 12 August 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 August 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mc Clusky	United States	Record daily precipitation	102.1 mm (4.0 in)	82 of 100 (Exceptional)
Lemmon	United States	Record daily precipitation	128.0 mm (5.0 in)	81 of 100 (Exceptional)
Anchorage Merrill Fld	United States	Record daily precipitation	30.7 mm (1.2 in)	70 of 100 (Major)
Moccasin Exp STN	United States	Record daily precipitation	45.0 mm (1.8 in)	67 of 100 (Major)
Max	United States	Record daily precipitation	55.9 mm (2.2 in)	67 of 100 (Major)
New England	United States	Record daily precipitation	73.7 mm (2.9 in)	64 of 100 (Major)
Melstone	United States	Record daily precipitation	41.1 mm (1.6 in)	63 of 100 (Major)
Ellendale	United States	Record daily precipitation	63.5 mm (2.5 in)	63 of 100 (Major)
Center 4SE	United States	Record daily precipitation	76.2 mm (3.0 in)	62 of 100 (Major)
Ekalaka	United States	Record daily precipitation	48.8 mm (1.9 in)	61 of 100 (Major)
Turtle Lake	United States	Record daily precipitation	88.9 mm (3.5 in)	61 of 100 (Major)
Harvey 4NE	United States	Record daily precipitation	122.7 mm (4.8 in)	60 of 100 (Major)
Fargo Hector Intl AP	United States	Record daily precipitation	67.8 mm (2.7 in)	60 of 100 (Major)
Bismarck	United States	Record daily precipitation	113.8 mm (4.5 in)	59 of 100 (Notable)
Pretty Rock	United States	Record daily precipitation	102.9 mm (4.1 in)	55 of 100 (Notable)
Crookston NW Exp STN	United States	Record daily precipitation	51.8 mm (2.0 in)	53 of 100 (Notable)
Billings Wtp	United States	Record daily precipitation	36.3 mm (1.4 in)	53 of 100 (Notable)
Underwood	United States	Record daily precipitation	57.2 mm (2.3 in)	53 of 100 (Notable)
Sonnette 7 SW	United States	Record daily precipitation	36.1 mm (1.4 in)	51 of 100 (Notable)
Webster 3 E	United States	Record daily precipitation	57.4 mm (2.3 in)	51 of 100 (Notable)
Carrington	United States	Record daily precipitation	56.4 mm (2.2 in)	51 of 100 (Notable)
Belltower	United States	Record daily precipitation	49.0 mm (1.9 in)	50 of 100 (Notable)
Carrington 4 N	United States	Record daily precipitation	101.6 mm (4.0 in)	49 of 100 (Notable)
Reeder	United States	Record daily precipitation	48.3 mm (1.9 in)	49 of 100 (Notable)
Shields	United States	Record daily precipitation	51.3 mm (2.0 in)	49 of 100 (Notable)
Zap	United States	Record daily precipitation	58.4 mm (2.3 in)	49 of 100 (Notable)
Talkeetna AP	United States	Record daily precipitation	62.7 mm (2.5 in)	49 of 100 (Notable)
San Francisco	Mexico	Record daily precipitation	125.5 mm (4.9 in)	48 of 100 (Notable)
Ft Yates 4 SW	United States	Record daily precipitation	36.8 mm (1.4 in)	48 of 100 (Notable)
Huimin	China	Record daily precipitation	114.0 mm (4.5 in)	47 of 100 (Notable)
Nikolsk	Russia	Record daily precipitation	35.4 mm (1.4 in)	46 of 100 (Notable)
Willits 1 NE	United States	Record low maximum temperature	19.4 C (66.9 F)	46 of 100 (Notable)
Grand Rapids Forestry Lab	United States	Record daily precipitation	43.7 mm (1.7 in)	46 of 100 (Notable)
Lincoln Rs	United States	Record daily precipitation	38.6 mm (1.5 in)	46 of 100 (Notable)
New Salem 5NW	United States	Record daily precipitation	59.4 mm (2.3 in)	46 of 100 (Notable)
Wilton	United States	Record daily precipitation	77.7 mm (3.1 in)	46 of 100 (Notable)
Kenai AP	United States	Record daily precipitation	34.3 mm (1.4 in)	46 of 100 (Notable)
Springfield Abraham Lincoln Ca	United States	Record daily precipitation	74.7 mm (2.9 in)	46 of 100 (Notable)
Inari Ivalo	Finland	Record daily precipitation	40.0 mm (1.6 in)	45 of 100 (Notable)
Garrison	United States	Record daily precipitation	71.9 mm (2.8 in)	45 of 100 (Notable)
Beaufort Wwtp	United States	Record high minimum temperature	26.7 C (80.1 F)	45 of 100 (Notable)
Jur'evec	Russia	Record daily precipitation	34.0 mm (1.3 in)	44 of 100 (Notable)
Perry	United States	Record daily precipitation	81.0 mm (3.2 in)	44 of 100 (Notable)
Fulton 3 W	United States	Record high minimum temperature	23.9 C (75.0 F)	44 of 100 (Notable)
Reeder 13 N	United States	Record daily precipitation	81.3 mm (3.2 in)	44 of 100 (Notable)
Jamestown Muni AP	United States	Record daily precipitation	53.1 mm (2.1 in)	44 of 100 (Notable)
Saint Bernard	United States	Record high minimum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Fortine 1 N	United States	Record daily precipitation	26.4 mm (1.0 in)	43 of 100 (Notable)
Hysham	United States	Record daily precipitation	31.8 mm (1.3 in)	43 of 100 (Notable)
Fullerton 1 ESE	United States	Record daily precipitation	54.6 mm (2.1 in)	43 of 100 (Notable)
Ludlow 3 SSE	United States	Record daily precipitation	62.5 mm (2.5 in)	43 of 100 (Notable)
Rio Piedras Exp STN	Puerto Rico [United States]	Record low maximum temperature	26.7 C (80.1 F)	42 of 100 (Notable)
Fayette	United States	Record high minimum temperature	23.3 C (73.9 F)	42 of 100 (Notable)
Estancia 4N	United States	Record low minimum temperature	4.4 C (39.9 F)	42 of 100 (Notable)
Washburn	United States	Record daily precipitation	64.8 mm (2.6 in)	42 of 100 (Notable)
Dale Enterprise	United States	Record high maximum temperature	37.2 C (99.0 F)	42 of 100 (Notable)
Cut Bank AP	United States	Record daily precipitation	29.2 mm (1.1 in)	42 of 100 (Notable)
Kokkola Korplax	Finland	Record daily precipitation	30.2 mm (1.2 in)	41 of 100 (Notable)
Milan	Italy	Record daily precipitation	48.4 mm (1.9 in)	41 of 100 (Notable)
Kautokeino	Norway	Record daily precipitation	28.0 mm (1.1 in)	41 of 100 (Notable)

Counts by Type and Timescale

1,325 records

Records set or tied on 12 August 1999 by type: Highest daily maximum 333, Lowest daily maximum 172, Highest daily minimum 418, Lowest daily minimum 146, Heaviest daily rainfall 255, Heaviest daily snowfall 1.

Records on 12 August 1999 by type
Record type	Records
Highest daily maximum	333
Lowest daily maximum	172
Highest daily minimum	418
Lowest daily minimum	146
Heaviest daily rainfall	255
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 12 August 1999 by timescale: all-time 10, monthly 54, daily 1,261.

How Much Records Were Beaten By

936 broken records

Margins by which the 936 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 95.0. Ties are not counted.

Top 20 by Significance

12 August 1999

Top 20 records on 12 August 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 August 1999	Mc Clusky, US	monthly rain	102.1 mm (4.0 in)	52.6 mm (2.1 in)	80 years	82 of 100 (Exceptional)
12 August 1999	Lemmon, US	all-time rain	128.0 mm (5.0 in)	26.4 mm (1.0 in)	77 years	81 of 100 (Exceptional)
12 August 1999	Anchorage Merrill Fld, US	daily rain	30.7 mm (1.2 in)	19.5 mm (0.8 in)	74 years	70 of 100 (Major)
12 August 1999	Moccasin Exp STN, US	daily rain	45.0 mm (1.8 in)	30.0 mm (1.2 in)	62 years	67 of 100 (Major)
12 August 1999	Max, US	daily rain	55.9 mm (2.2 in)	41.7 mm (1.6 in)	66 years	67 of 100 (Major)
12 August 1999	New England, US	monthly rain	73.7 mm (2.9 in)	17.8 mm (0.7 in)	93 years	64 of 100 (Major)
12 August 1999	Melstone, US	daily rain	41.1 mm (1.6 in)	32.2 mm (1.3 in)	48 years	63 of 100 (Major)
12 August 1999	Ellendale, US	daily rain	63.5 mm (2.5 in)	27.9 mm (1.1 in)	98 years	63 of 100 (Major)
12 August 1999	Center 4SE, US	monthly rain	76.2 mm (3.0 in)	25.4 mm (1.0 in)	47 years	62 of 100 (Major)
12 August 1999	Ekalaka, US	daily rain	48.8 mm (1.9 in)	28.7 mm (1.1 in)	52 years	61 of 100 (Major)
12 August 1999	Turtle Lake, US	daily rain	88.9 mm (3.5 in)	71.1 mm (2.8 in)	44 years	61 of 100 (Major)
12 August 1999	Harvey 4NE, US	all-time rain	122.7 mm (4.8 in)	32.5 mm (1.3 in)	9 years	60 of 100 (Major)
12 August 1999	Fargo Hector Intl AP, US	daily rain	67.8 mm (2.7 in)	41.6 mm (1.6 in)	53 years	60 of 100 (Major)
12 August 1999	Bismarck, US	daily rain	113.8 mm (4.5 in)	93.2 mm (3.7 in)	49 years	59 of 100 (Notable)
12 August 1999	Pretty Rock, US	monthly rain	102.9 mm (4.1 in)	40.7 mm (1.6 in)	5 years	55 of 100 (Notable)
12 August 1999	Crookston NW Exp STN, US	daily rain	51.8 mm (2.0 in)	37.3 mm (1.5 in)	40 years	53 of 100 (Notable)
12 August 1999	Billings Wtp, US	daily rain	36.3 mm (1.4 in)	20.8 mm (0.8 in)	48 years	53 of 100 (Notable)
12 August 1999	Underwood, US	daily rain	57.2 mm (2.3 in)	44.5 mm (1.8 in)	32 years	53 of 100 (Notable)
12 August 1999	Sonnette 7 SW, US	daily rain	36.1 mm (1.4 in)	31.8 mm (1.3 in)	29 years	51 of 100 (Notable)
12 August 1999	Webster 3 E, US	monthly rain	57.4 mm (2.3 in)	18.5 mm (0.7 in)	26 years	51 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

1793 to 1999

Records set or tied on this calendar date in each year from 1793 to 1999. 1999 had 1,325 records.

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

Records on 08-12 in each year
Year	Records
1793	1
1796	1
1811	2
1814	1
1815	1
1825	1
1843	1
1851	1
1854	1
1855	2
1856	1
1861	1
1864	3
1865	1
1867	1
1868	1
1871	2
1872	1
1873	1
1874	2
1875	3
1876	2
1879	1
1881	2
1883	1
1884	1
1885	1
1887	2
1888	2
1889	4
1890	4
1891	4
1892	2
1893	1
1894	1
1895	6
1896	2
1897	4
1898	1
1899	10
1900	1
1901	5
1902	9
1903	14
1904	13
1905	16
1906	8
1907	8
1908	31
1909	42
1910	16
1911	33
1912	40
1913	39
1914	26
1915	46
1916	31
1917	134
1918	37
1919	42
1920	26
1921	174
1922	71
1923	89
1924	267
1925	150
1926	154
1927	145
1928	173
1929	276
1930	501
1931	708
1932	418
1933	271
1934	471
1935	408
1936	591
1937	356
1938	237
1939	282
1940	545
1941	481
1942	257
1943	523
1944	595
1945	295
1946	655
1947	729
1948	384
1949	469
1950	442
1951	357
1952	533
1953	227
1954	969
1955	590
1956	265
1957	384
1958	406
1959	388
1960	707
1961	381
1962	466
1963	559
1964	1,346
1965	977
1966	777
1967	1,135
1968	444
1969	629
1970	422
1971	486
1972	473
1973	442
1974	560
1975	593
1976	495
1977	747
1978	571
1979	1,192
1980	692
1981	665
1982	789
1983	923
1984	665
1985	935
1986	615
1987	935
1988	1,518
1989	827
1990	727
1991	726
1992	1,134
1993	936
1994	861
1995	1,654
1996	1,336
1997	1,363
1998	1,215
1999	1,325
2000	741
2001	855
2002	1,345
2003	1,752
2004	1,872
2005	1,085
2006	874
2007	1,209
2008	970
2009	814
2010	1,907
2011	903
2012	910
2013	427
2014	787
2015	757
2016	1,290
2017	533
2018	571
2019	695
2020	730
2021	980
2022	616
2023	779
2024	659
2025	639
2026	849

Download the Data

Data for records on 1999-08-12: 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	885
20 to 40	37
40 to 60	9
60 to 80	3
80 to 100	2