Weather Records on 21 August 1999

717 weather records were set or tied worldwide on 21 August 1999. Highest significance: Bradford Cntrl Fs, US.

Key Facts for 21 August 1999

On 21 August 1999, 717 weather records were set or tied at long-record stations worldwide.
388 were record highs and 199 were record lows, counting maximum and minimum temperature.
By timescale, 5 were all-time records, 15 monthly and 697 daily.
Bradford Cntrl Fs set an all-time record daily precipitation of 141.2 mm (5.6 in) on 21 August 1999.
Across 165 earlier years (1800 to 2026) the same calendar date averaged 448 records.

Record Map

717 stations

717 station records on 21 August 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 August 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bradford Cntrl Fs	United States	Record daily precipitation	141.2 mm (5.6 in)	90 of 100 (Exceptional)
Ferron	United States	Record daily precipitation	28.2 mm (1.1 in)	58 of 100 (Notable)
Emmitsburg 2 SE	United States	Record daily precipitation	77.5 mm (3.1 in)	56 of 100 (Notable)
Hueycatenango (Cfe)	Mexico	Record daily precipitation	78.0 mm (3.1 in)	52 of 100 (Notable)
Tezontepec (Smn)	Mexico	Record daily precipitation	41.4 mm (1.6 in)	50 of 100 (Notable)
Winsted	United States	Record daily precipitation	76.5 mm (3.0 in)	50 of 100 (Notable)
Hutchinson 1 N	United States	Record daily precipitation	70.4 mm (2.8 in)	47 of 100 (Notable)
Mixquiahuala (Smn)	Mexico	Record daily precipitation	63.8 mm (2.5 in)	46 of 100 (Notable)
Waynesboro 2 W	United States	Record high maximum temperature	38.3 C (100.9 F)	46 of 100 (Notable)
Chama	United States	Record high minimum temperature	17.2 C (63.0 F)	46 of 100 (Notable)
La Tinaja	Mexico	Record high maximum temperature	32.8 C (91.0 F)	44 of 100 (Notable)
Santa Barbara	United States	Record low maximum temperature	19.4 C (66.9 F)	44 of 100 (Notable)
Franklin 3 NW	United States	Record high minimum temperature	25.6 C (78.1 F)	44 of 100 (Notable)
Colden 1 N	United States	Record daily precipitation	66.0 mm (2.6 in)	44 of 100 (Notable)
Poplarville Exp STN	United States	Record high maximum temperature	38.9 C (102.0 F)	43 of 100 (Notable)
La Vega	Mexico	Record low maximum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Elkhorn	United States	Record low maximum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Nicosia	Cyprus	Record high minimum temperature	26.1 C (79.0 F)	41 of 100 (Notable)
Alexandria	United States	Record high maximum temperature	40.0 C (104.0 F)	41 of 100 (Notable)
Sugar Land	United States	Record high maximum temperature	39.4 C (102.9 F)	41 of 100 (Notable)
Staunton Wtp	United States	Record daily precipitation	26.7 mm (1.1 in)	41 of 100 (Notable)
Urakawa	Japan	Record high minimum temperature	23.8 C (74.8 F)	40 of 100 (Notable)
Rangely 1E	United States	Record low maximum temperature	22.8 C (73.0 F)	40 of 100 (Notable)
Monticello	United States	Record high minimum temperature	26.1 C (79.0 F)	40 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record high minimum temperature	28.0 C (82.4 F)	39 of 100 (Notable)
Fairmont	United States	Record low minimum temperature	5.6 C (42.1 F)	38 of 100 (Notable)
S Mtn	United States	Record daily precipitation	65.5 mm (2.6 in)	37 of 100 (Notable)
Crockett	United States	Record high maximum temperature	40.0 C (104.0 F)	37 of 100 (Notable)
Santiago Zautla (Cfe)	Mexico	Record low minimum temperature	1.7 C (35.1 F)	36 of 100 (Notable)
Frontera Amatenango	Mexico	Record daily precipitation	62.5 mm (2.5 in)	35 of 100 (Notable)
Rio Salado	Mexico	Record daily precipitation	41.4 mm (1.6 in)	35 of 100 (Notable)
Finike	Turkey	Record high minimum temperature	27.6 C (81.7 F)	35 of 100 (Notable)
Lexington	United States	Record daily precipitation	80.3 mm (3.2 in)	35 of 100 (Notable)
La Piedad de Cabadas (Dge)	Mexico	Record low maximum temperature	18.9 C (66.0 F)	34 of 100 (Routine)
Henichesk	Ukraine	Record high maximum temperature	35.0 C (95.0 F)	34 of 100 (Routine)
Mt Pleasant	United States	Record high minimum temperature	26.7 C (80.1 F)	34 of 100 (Routine)
St Cloud Rgnl AP	United States	Record daily precipitation	71.4 mm (2.8 in)	34 of 100 (Routine)
Akron Washington Co AP	United States	Record daily precipitation	84.6 mm (3.3 in)	33 of 100 (Routine)
Jiulong	China	Record daily precipitation	34.6 mm (1.4 in)	32 of 100 (Routine)
Beaver Dam	United States	Record low minimum temperature	6.7 C (44.1 F)	32 of 100 (Routine)
Verhneimbatsk	Russia	Record high minimum temperature	15.3 C (59.5 F)	31 of 100 (Routine)
Bridgehampton	United States	Record low maximum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Marshall	United States	Record low minimum temperature	8.9 C (48.0 F)	31 of 100 (Routine)
Calarasi	Romania	Record high minimum temperature	21.7 C (71.1 F)	30 of 100 (Routine)
Capo Bellavista	Italy	Record high minimum temperature	26.6 C (79.9 F)	29 of 100 (Routine)
Gran Canal KM. 06+250	Mexico	Record daily precipitation	37.1 mm (1.5 in)	29 of 100 (Routine)
El Sabino	Mexico	Record high maximum temperature	33.9 C (93.0 F)	29 of 100 (Routine)
Presa El Tigre	Mexico	Record daily precipitation	47.8 mm (1.9 in)	29 of 100 (Routine)
Arrowrock Dam	United States	Record high minimum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Elizabethton	United States	Record low minimum temperature	12.2 C (54.0 F)	29 of 100 (Routine)
Kurdjali	Bulgaria	Record high maximum temperature	39.7 C (103.5 F)	28 of 100 (Routine)
Madras/Minambakkam	India	Record daily precipitation	59.9 mm (2.4 in)	28 of 100 (Routine)
La Piedad de Cabadas (Dge)	Mexico	Record daily precipitation	39.9 mm (1.6 in)	28 of 100 (Routine)
Tenosique (Smn)	Mexico	Record low minimum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Indiga	Russia	Record low maximum temperature	6.3 C (43.3 F)	28 of 100 (Routine)
Harlem	United States	Record high maximum temperature	38.3 C (100.9 F)	28 of 100 (Routine)
Powers Lake 1N	United States	Record high minimum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Fredericksburg	United States	Record high maximum temperature	40.0 C (104.0 F)	28 of 100 (Routine)
Yibin	China	Record low maximum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Ixhuatlan del Cafe	Mexico	Record daily precipitation	67.8 mm (2.7 in)	27 of 100 (Routine)

Counts by Type and Timescale

717 records

Records set or tied on 21 August 1999 by type: Highest daily maximum 212, Lowest daily maximum 98, Highest daily minimum 176, Lowest daily minimum 101, Heaviest daily rainfall 130.

Records on 21 August 1999 by type
Record type	Records
Highest daily maximum	212
Lowest daily maximum	98
Highest daily minimum	176
Lowest daily minimum	101
Heaviest daily rainfall	130
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 August 1999 by timescale: all-time 5, monthly 15, daily 697.

How Much Records Were Beaten By

512 broken records

Margins by which the 512 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 51.6. Ties are not counted.

Top 20 by Significance

21 August 1999

Top 20 records on 21 August 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 August 1999	Bradford Cntrl Fs, US	all-time rain	141.2 mm (5.6 in)	39.6 mm (1.6 in)	77 years	90 of 100 (Exceptional)
21 August 1999	Ferron, US	daily rain	28.2 mm (1.1 in)	21.3 mm (0.8 in)	28 years	58 of 100 (Notable)
21 August 1999	Emmitsburg 2 SE, US	daily rain	77.5 mm (3.1 in)	49.1 mm (1.9 in)	42 years	56 of 100 (Notable)
21 August 1999	Hueycatenango (Cfe), MX	daily rain	78.0 mm (3.1 in)	43.2 mm (1.7 in)	40 years	52 of 100 (Notable)
21 August 1999	Tezontepec (Smn), MX	daily rain	41.4 mm (1.6 in)	27.4 mm (1.1 in)	32 years	50 of 100 (Notable)
21 August 1999	Winsted, US	daily rain	76.5 mm (3.0 in)	51.6 mm (2.0 in)	26 years	50 of 100 (Notable)
21 August 1999	Hutchinson 1 N, US	daily rain	70.4 mm (2.8 in)	39.4 mm (1.6 in)	34 years	47 of 100 (Notable)
21 August 1999	Mixquiahuala (Smn), MX	daily rain	63.8 mm (2.5 in)	38.4 mm (1.5 in)	10 years	46 of 100 (Notable)
21 August 1999	Waynesboro 2 W, US	daily high max	38.3 C (100.9 F)	1.6 C (2.9 F)	96 years	46 of 100 (Notable)
21 August 1999	Chama, US	monthly high min	17.2 C (63.0 F)	1.6 C (2.9 F)	67 years	46 of 100 (Notable)
21 August 1999	La Tinaja, MX	daily high max	32.8 C (91.0 F)	7.2 C (13.0 F)	28 years	44 of 100 (Notable)
21 August 1999	Santa Barbara, US	daily low max	19.4 C (66.9 F)	1.2 C (2.2 F)	105 years	44 of 100 (Notable)
21 August 1999	Franklin 3 NW, US	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	102 years	44 of 100 (Notable)
21 August 1999	Colden 1 N, US	daily rain	66.0 mm (2.6 in)	43.1 mm (1.7 in)	5 years	44 of 100 (Notable)
21 August 1999	Poplarville Exp STN, US	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	96 years	43 of 100 (Notable)
21 August 1999	La Vega, MX	daily low max	21.7 C (71.1 F)	4.4 C (7.9 F)	36 years	42 of 100 (Notable)
21 August 1999	Elkhorn, US	daily low max	22.2 C (72.0 F)	0.6 C (1.1 F)	101 years	42 of 100 (Notable)
21 August 1999	Nicosia, CY	daily high min	26.1 C (79.0 F)	0.4 C (0.7 F)	105 years	41 of 100 (Notable)
21 August 1999	Alexandria, US	daily high max	40.0 C (104.0 F)	0.6 C (1.1 F)	96 years	41 of 100 (Notable)
21 August 1999	Sugar Land, US	daily high max	39.4 C (102.9 F)	0.5 C (0.9 F)	99 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

1800 to 1999

Records set or tied on this calendar date in each year from 1800 to 1999. 1999 had 717 records.

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

Records on 08-21 in each year
Year	Records
1800	1
1802	1
1804	1
1807	1
1816	1
1818	1
1832	1
1834	1
1839	3
1843	1
1847	1
1849	3
1850	1
1851	2
1863	1
1866	1
1867	2
1870	3
1871	2
1872	1
1873	1
1876	1
1877	2
1879	2
1884	2
1885	5
1886	1
1887	5
1888	2
1889	3
1890	4
1891	2
1893	4
1894	8
1895	3
1896	2
1897	4
1898	4
1899	7
1900	4
1901	9
1902	8
1903	6
1904	8
1905	4
1906	22
1907	20
1908	13
1909	17
1910	33
1911	19
1912	50
1913	37
1914	24
1915	21
1916	106
1917	101
1918	202
1919	19
1920	59
1921	34
1922	58
1923	111
1924	135
1925	220
1926	227
1927	228
1928	110
1929	234
1930	297
1931	277
1932	264
1933	328
1934	320
1935	318
1936	807
1937	762
1938	239
1939	630
1940	683
1941	180
1942	415
1943	438
1944	346
1945	544
1946	390
1947	954
1948	305
1949	508
1950	958
1951	699
1952	368
1953	331
1954	497
1955	885
1956	701
1957	490
1958	389
1959	704
1960	490
1961	644
1962	469
1963	338
1964	794
1965	455
1966	661
1967	541
1968	1,014
1969	650
1970	373
1971	660
1972	441
1973	438
1974	564
1975	545
1976	756
1977	764
1978	445
1979	778
1980	904
1981	1,015
1982	769
1983	1,407
1984	975
1985	623
1986	1,166
1987	740
1988	889
1989	828
1990	910
1991	828
1992	957
1993	698
1994	968
1995	962
1996	950
1997	1,291
1998	948
1999	717
2000	861
2001	797
2002	965
2003	1,241
2004	1,585
2005	1,071
2006	797
2007	1,829
2008	1,012
2009	1,319
2010	1,155
2011	1,022
2012	990
2013	513
2014	624
2015	651
2016	890
2017	347
2018	816
2019	631
2020	1,147
2021	767
2022	917
2023	1,826
2024	777
2025	1,230
2026	1,289

Download the Data

Data for records on 1999-08-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 10	478
10 to 20	11
20 to 30	10
30 to 40	9
40 to 50	3
50 to 60	1