Weather Records on 21 April 1999

752 weather records were set or tied worldwide on 21 April 1999. Highest significance: Loksak, RU.

Key Facts for 21 April 1999

On 21 April 1999, 752 weather records were set or tied at long-record stations worldwide.
372 were record highs and 188 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 41 monthly and 710 daily.
Loksak set a monthly record daily precipitation of 46.0 mm (1.8 in) on 21 April 1999.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 460 records.

Record Map

752 stations

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

Weather records on 21 April 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Loksak	Russia	Record daily precipitation	46.0 mm (1.8 in)	53 of 100 (Notable)
Miles City AP	United States	Record daily precipitation	31.0 mm (1.2 in)	53 of 100 (Notable)
Mackenzie	United States	Record daily precipitation	41.9 mm (1.6 in)	45 of 100 (Notable)
Ganzhou	China	Record daily precipitation	71.4 mm (2.8 in)	44 of 100 (Notable)
Bolmen	Sweden	Record daily precipitation	25.1 mm (1.0 in)	44 of 100 (Notable)
Brandenberg	United States	Record daily precipitation	42.4 mm (1.7 in)	44 of 100 (Notable)
Shiptons Flat	Australia	Record daily precipitation	144.6 mm (5.7 in)	43 of 100 (Notable)
Hardin	United States	Record daily precipitation	26.7 mm (1.1 in)	43 of 100 (Notable)
Rutland Plains Station	Australia	Record daily precipitation	50.0 mm (2.0 in)	42 of 100 (Notable)
St. Petersburg	Russia	Record high minimum temperature	12.3 C (54.1 F)	42 of 100 (Notable)
Saint Anthony	United States	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Madison Sewage Plt	United States	Record low minimum temperature	-4.4 C (24.1 F)	41 of 100 (Notable)
Volborg	United States	Record daily precipitation	43.4 mm (1.7 in)	41 of 100 (Notable)
Petropavlovsk	Kazakhstan	Record low maximum temperature	-2.2 C (28.0 F)	40 of 100 (Notable)
McDermitt	United States	Record low maximum temperature	6.7 C (44.1 F)	40 of 100 (Notable)
Bremerton	United States	Record low maximum temperature	9.4 C (48.9 F)	40 of 100 (Notable)
Postville	United States	Record daily precipitation	35.6 mm (1.4 in)	39 of 100 (Notable)
Busby	United States	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Fontenelle Dam	United States	Record daily snowfall	12.7 cm (5.0 in)	38 of 100 (Notable)
Cape Leeuwin	Australia	Record high maximum temperature	29.0 C (84.2 F)	35 of 100 (Notable)
Kvikkjokk-Arrenjarka	Sweden	Record high minimum temperature	1.8 C (35.2 F)	35 of 100 (Notable)
Alamogordo	United States	Record high minimum temperature	18.9 C (66.0 F)	35 of 100 (Notable)
Ukhta Kalevala	Russia	Record high maximum temperature	20.9 C (69.6 F)	33 of 100 (Routine)
Mizpah 4 NNW	United States	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Denio	United States	Record daily snowfall	7.6 cm (3.0 in)	33 of 100 (Routine)
Vaala Pelso	Finland	Record high maximum temperature	20.2 C (68.4 F)	32 of 100 (Routine)
Kustanai	Kazakhstan	Record low maximum temperature	-1.3 C (29.7 F)	32 of 100 (Routine)
Tres Brazos	Mexico	Record low minimum temperature	13.9 C (57.0 F)	32 of 100 (Routine)
El Copital	Mexico	Record low minimum temperature	11.7 C (53.1 F)	32 of 100 (Routine)
McKinley Park	United States	Record high maximum temperature	14.4 C (57.9 F)	32 of 100 (Routine)
Siikajoki Revonlahti	Finland	Record high maximum temperature	20.5 C (68.9 F)	31 of 100 (Routine)
Muhos Kk Laitasaari	Finland	Record high maximum temperature	21.0 C (69.8 F)	31 of 100 (Routine)
Astana	Kazakhstan	Record low maximum temperature	-2.7 C (27.1 F)	31 of 100 (Routine)
Aralskoe More	Kazakhstan	Record low minimum temperature	-4.5 C (23.9 F)	31 of 100 (Routine)
Kazalinsk	Kazakhstan	Record low maximum temperature	3.9 C (39.0 F)	31 of 100 (Routine)
Sundance	United States	Record daily precipitation	25.7 mm (1.0 in)	31 of 100 (Routine)
Eagle	United States	Record high maximum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Narrogin	Australia	Record high maximum temperature	30.5 C (86.9 F)	30 of 100 (Routine)
Nuwara Eliya	Sri Lanka	Record low maximum temperature	16.2 C (61.2 F)	30 of 100 (Routine)
Atbasar	Kazakhstan	Record low maximum temperature	-3.7 C (25.3 F)	30 of 100 (Routine)
Gridino	Russia	Record high maximum temperature	18.6 C (65.5 F)	30 of 100 (Routine)
Storm Lake	United States	Record daily precipitation	60.5 mm (2.4 in)	30 of 100 (Routine)
Moorhead 9 NE	United States	Record daily precipitation	25.1 mm (1.0 in)	30 of 100 (Routine)
Ekalaka	United States	Record daily precipitation	39.4 mm (1.6 in)	29 of 100 (Routine)
Hysham	United States	Record daily precipitation	25.4 mm (1.0 in)	29 of 100 (Routine)
Elida	United States	Record high minimum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Saint Paul Is AP	United States	Record snow depth	66.0 cm (26.0 in)	29 of 100 (Routine)
Bridgetown Comparison	Australia	Record high maximum temperature	31.0 C (87.8 F)	28 of 100 (Routine)
Lhasa	China	Record high maximum temperature	24.3 C (75.7 F)	28 of 100 (Routine)
Hiddensee-Vitte	Germany	Record low minimum temperature	-1.1 C (30.0 F)	28 of 100 (Routine)
Rinconada	Mexico	Record high maximum temperature	40.6 C (105.1 F)	28 of 100 (Routine)
Reboly	Russia	Record high maximum temperature	19.0 C (66.2 F)	28 of 100 (Routine)
Sonnette 7 SW	United States	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Nivala	Finland	Record high maximum temperature	20.2 C (68.4 F)	27 of 100 (Routine)
Haapavesi Mustikkamaki	Finland	Record high maximum temperature	18.8 C (65.8 F)	27 of 100 (Routine)
Kajaani Lentoasema-1	Finland	Record high maximum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Chuuk WSO AP	Federated States of Micronesia	Record low minimum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Irgiz	Kazakhstan	Record low minimum temperature	-6.5 C (20.3 F)	27 of 100 (Routine)
Venados	Mexico	Record low minimum temperature	5.6 C (42.1 F)	27 of 100 (Routine)
Viroqua	United States	Record daily precipitation	38.1 mm (1.5 in)	27 of 100 (Routine)

Counts by Type and Timescale

752 records

Records set or tied on 21 April 1999 by type: Highest daily maximum 215, Lowest daily maximum 78, Highest daily minimum 157, Lowest daily minimum 110, Heaviest daily rainfall 170, Heaviest daily snowfall 16, Deepest snow cover 6.

Records on 21 April 1999 by type
Record type	Records
Highest daily maximum	215
Lowest daily maximum	78
Highest daily minimum	157
Lowest daily minimum	110
Heaviest daily rainfall	170
Heaviest daily snowfall	16
Deepest snow cover	6

Records on 21 April 1999 by timescale: all-time 1, monthly 41, daily 710.

How Much Records Were Beaten By

599 broken records

Margins by which the 599 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 178.0. Ties are not counted.

Top 20 by Significance

21 April 1999

Top 20 records on 21 April 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 1999	Loksak, RU	monthly rain	46.0 mm (1.8 in)	17.0 mm (0.7 in)	0 years	53 of 100 (Notable)
21 April 1999	Miles City AP, US	daily rain	31.0 mm (1.2 in)	21.1 mm (0.8 in)	40 years	53 of 100 (Notable)
21 April 1999	Mackenzie, US	daily rain	41.9 mm (1.6 in)	31.7 mm (1.2 in)	1 year	45 of 100 (Notable)
21 April 1999	Ganzhou, CN	daily rain	71.4 mm (2.8 in)	39.3 mm (1.5 in)	36 years	44 of 100 (Notable)
21 April 1999	Bolmen, SE	daily rain	25.1 mm (1.0 in)	13.8 mm (0.5 in)	28 years	44 of 100 (Notable)
21 April 1999	Brandenberg, US	daily rain	42.4 mm (1.7 in)	30.0 mm (1.2 in)	1 year	44 of 100 (Notable)
21 April 1999	Shiptons Flat, AU	daily rain	144.6 mm (5.7 in)	101.9 mm (4.0 in)	28 years	43 of 100 (Notable)
21 April 1999	Hardin, US	daily rain	26.7 mm (1.1 in)	21.1 mm (0.8 in)	28 years	43 of 100 (Notable)
21 April 1999	Rutland Plains Station, AU	daily rain	50.0 mm (2.0 in)	47.5 mm (1.9 in)	42 years	42 of 100 (Notable)
21 April 1999	St. Petersburg, RU	daily high min	12.3 C (54.1 F)	3.1 C (5.6 F)	85 years	42 of 100 (Notable)
21 April 1999	Saint Anthony, US	monthly rain	33.0 mm (1.3 in)	4.3 mm (0.17 in)	44 years	42 of 100 (Notable)
21 April 1999	Madison Sewage Plt, US	daily low min	-4.4 C (24.1 F)	2.2 C (4.0 F)	92 years	41 of 100 (Notable)
21 April 1999	Volborg, US	daily rain	43.4 mm (1.7 in)	32.5 mm (1.3 in)	1 year	41 of 100 (Notable)
21 April 1999	Petropavlovsk, KZ	daily low max	-2.2 C (28.0 F)	1.1 C (2.0 F)	98 years	40 of 100 (Notable)
21 April 1999	McDermitt, US	daily low max	6.7 C (44.1 F)	0.5 C (0.9 F)	105 years	40 of 100 (Notable)
21 April 1999	Bremerton, US	daily low max	9.4 C (48.9 F)	0.6 C (1.1 F)	97 years	40 of 100 (Notable)
21 April 1999	Postville, US	daily rain	35.6 mm (1.4 in)	1.3 mm (0.05 in)	93 years	39 of 100 (Notable)
21 April 1999	Busby, US	daily rain	29.0 mm (1.1 in)	14.5 mm (0.6 in)	1 year	39 of 100 (Notable)
21 April 1999	Fontenelle Dam, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	34 years	38 of 100 (Notable)
21 April 1999	Cape Leeuwin, AU	daily high max	29.0 C (84.2 F)	1.2 C (2.2 F)	76 years	35 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 752 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 1999-04-21: 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 25	579
25 to 50	10
50 to 75	4
75 to 100	2
100 to 125	1
125 to 150	1
150 to 175	0
175 to 200	2