Weather Records on 20 April 1999

674 weather records were set or tied worldwide on 20 April 1999. Highest significance: Colstrip, US.

Key Facts for 20 April 1999

On 20 April 1999, 674 weather records were set or tied at long-record stations worldwide.
355 were record highs and 184 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 20 monthly and 653 daily.
Colstrip set a daily record precipitation of 34.0 mm (1.3 in) on 20 April 1999.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 461 records.

Record Map

674 stations

674 station records on 20 April 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Colstrip	United States	Record daily precipitation	34.0 mm (1.3 in)	60 of 100 (Major)
Huetamo	Mexico	Record low maximum temperature	30.0 C (86.0 F)	49 of 100 (Notable)
Leuchars	United Kingdom	Record daily precipitation	28.4 mm (1.1 in)	47 of 100 (Notable)
Tobolsk	Russia	Record low maximum temperature	-7.8 C (18.0 F)	45 of 100 (Notable)
Ardtalnaig	United Kingdom	Record daily precipitation	33.1 mm (1.3 in)	44 of 100 (Notable)
Tonsina	United States	Record high maximum temperature	13.3 C (55.9 F)	41 of 100 (Notable)
Flying Fish Point	Australia	Record daily precipitation	77.0 mm (3.0 in)	40 of 100 (Notable)
Nuwara Eliya	Sri Lanka	Record high minimum temperature	14.5 C (58.1 F)	40 of 100 (Notable)
Heber	United States	Record high minimum temperature	7.2 C (45.0 F)	40 of 100 (Notable)
Vytegra	Russia	Record high maximum temperature	22.9 C (73.2 F)	39 of 100 (Notable)
Dyce	United Kingdom	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Nuwara Eliya	Sri Lanka	Record low maximum temperature	16.9 C (62.4 F)	38 of 100 (Notable)
Lugo/Rozas	Spain	Record daily precipitation	31.0 mm (1.2 in)	38 of 100 (Notable)
Burketown Post Office	Australia	Record high minimum temperature	26.0 C (78.8 F)	37 of 100 (Notable)
Union de San Antonio	Mexico	Record high maximum temperature	40.6 C (105.1 F)	37 of 100 (Notable)
Velikie Luki	Russia	Record high minimum temperature	8.9 C (48.0 F)	37 of 100 (Notable)
Live Oak	United States	Record low minimum temperature	3.9 C (39.0 F)	37 of 100 (Notable)
Snake Creek Powerhouse	United States	Record high minimum temperature	7.2 C (45.0 F)	35 of 100 (Notable)
Cairns Post Office	Australia	Record low maximum temperature	25.2 C (77.4 F)	34 of 100 (Routine)
Reboly	Russia	Record high maximum temperature	19.5 C (67.1 F)	34 of 100 (Routine)
Arco	United States	Record high minimum temperature	6.7 C (44.1 F)	34 of 100 (Routine)
Wyola 1 SW	United States	Record daily precipitation	29.5 mm (1.2 in)	34 of 100 (Routine)
Mulege	Mexico	Record high maximum temperature	39.4 C (102.9 F)	32 of 100 (Routine)
El Copital	Mexico	Record low minimum temperature	10.6 C (51.1 F)	32 of 100 (Routine)
Harveyville	United States	Record daily precipitation	48.3 mm (1.9 in)	32 of 100 (Routine)
Rauma Kuuskajaskari	Finland	Record high maximum temperature	19.8 C (67.6 F)	31 of 100 (Routine)
Maaninka Halola	Finland	Record high maximum temperature	19.8 C (67.6 F)	31 of 100 (Routine)
Liperi Joensuun Lentoasema	Finland	Record high maximum temperature	19.1 C (66.4 F)	31 of 100 (Routine)
Grace	United States	Record high minimum temperature	6.1 C (43.0 F)	31 of 100 (Routine)
Crescent Lake Nwr	United States	Record high minimum temperature	15.0 C (59.0 F)	31 of 100 (Routine)
University Exp STN	United States	Record high minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Jyvaskyla Lentoasema	Finland	Record high maximum temperature	20.3 C (68.5 F)	30 of 100 (Routine)
Vesanto Sonkari	Finland	Record high maximum temperature	19.5 C (67.1 F)	30 of 100 (Routine)
Glenlee	United Kingdom	Record daily precipitation	35.9 mm (1.4 in)	30 of 100 (Routine)
Valentia Observatory	Ireland	Record daily precipitation	33.1 mm (1.3 in)	29 of 100 (Routine)
Siilinjarvi Kuopion Lentoasema	Finland	Record high maximum temperature	18.8 C (65.8 F)	29 of 100 (Routine)
Saint Paul Is AP	United States	Record snow depth	66.0 cm (26.0 in)	29 of 100 (Routine)
Vierema Kaarakkala	Finland	Record high maximum temperature	18.5 C (65.3 F)	27 of 100 (Routine)
Kuhmo Keskusta	Finland	Record high maximum temperature	17.4 C (63.3 F)	27 of 100 (Routine)
Parrish	United States	Record low minimum temperature	1.7 C (35.1 F)	27 of 100 (Routine)
Joutsa Leivonmaki Savenaho	Finland	Record high maximum temperature	19.5 C (67.1 F)	26 of 100 (Routine)
Callejones	Mexico	Record high maximum temperature	38.9 C (102.0 F)	26 of 100 (Routine)
Tezontepec (Smn)	Mexico	Record high minimum temperature	12.8 C (55.0 F)	26 of 100 (Routine)
Saentis	Switzerland	Record snow depth	815.0 cm (320.9 in)	26 of 100 (Routine)
Port Huron	United States	Record low minimum temperature	-6.1 C (21.0 F)	26 of 100 (Routine)
Jalpa de Mendez	Mexico	Record low maximum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Gridino	Russia	Record high minimum temperature	3.2 C (37.8 F)	25 of 100 (Routine)
Grizedale	United Kingdom	Record daily precipitation	27.6 mm (1.1 in)	25 of 100 (Routine)
Eagle	United States	Record high maximum temperature	17.2 C (63.0 F)	25 of 100 (Routine)
Palmdale AP	United States	Record high minimum temperature	12.8 C (55.0 F)	25 of 100 (Routine)
Fairbanks Intl AP	United States	Record high minimum temperature	4.4 C (39.9 F)	25 of 100 (Routine)
Tully Sugar Mill	Australia	Record daily precipitation	87.6 mm (3.4 in)	24 of 100 (Routine)
Venadero (Dge)	Mexico	Record high maximum temperature	35.0 C (95.0 F)	24 of 100 (Routine)
Tonala (Dge)	Mexico	Record high minimum temperature	28.9 C (84.0 F)	24 of 100 (Routine)
Presa Danxho	Mexico	Record low maximum temperature	15.6 C (60.1 F)	24 of 100 (Routine)
San Martin Chalchicuautla	Mexico	Record low minimum temperature	8.9 C (48.0 F)	24 of 100 (Routine)
Cardenas	Mexico	Record low maximum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Kwajalein	Marshall Islands	Record low minimum temperature	22.2 C (72.0 F)	24 of 100 (Routine)
Padany	Russia	Record high maximum temperature	20.6 C (69.1 F)	24 of 100 (Routine)
El Capitan Dam	United States	Record high maximum temperature	36.7 C (98.1 F)	24 of 100 (Routine)

Counts by Type and Timescale

674 records

Records set or tied on 20 April 1999 by type: Highest daily maximum 211, Lowest daily maximum 56, Highest daily minimum 144, Lowest daily minimum 128, Heaviest daily rainfall 130, Heaviest daily snowfall 2, Deepest snow cover 3.

Records on 20 April 1999 by type
Record type	Records
Highest daily maximum	211
Lowest daily maximum	56
Highest daily minimum	144
Lowest daily minimum	128
Heaviest daily rainfall	130
Heaviest daily snowfall	2
Deepest snow cover	3

Records on 20 April 1999 by timescale: all-time 1, monthly 20, daily 653.

How Much Records Were Beaten By

514 broken records

Margins by which the 514 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

20 April 1999

Top 20 records on 20 April 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1999	Colstrip, US	daily rain	34.0 mm (1.3 in)	24.1 mm (0.9 in)	65 years	60 of 100 (Major)
20 April 1999	Huetamo, MX	daily low max	30.0 C (86.0 F)	5.0 C (9.0 F)	69 years	49 of 100 (Notable)
20 April 1999	Leuchars, GB	daily rain	28.4 mm (1.1 in)	20.2 mm (0.8 in)	10 years	47 of 100 (Notable)
20 April 1999	Tobolsk, RU	daily low max	-7.8 C (18.0 F)	6.4 C (11.5 F)	86 years	45 of 100 (Notable)
20 April 1999	Ardtalnaig, GB	daily rain	33.1 mm (1.3 in)	16.6 mm (0.7 in)	36 years	44 of 100 (Notable)
20 April 1999	Tonsina, US	daily high max	13.3 C (55.9 F)	2.2 C (4.0 F)	92 years	41 of 100 (Notable)
20 April 1999	Flying Fish Point, AU	daily rain	77.0 mm (3.0 in)	36.4 mm (1.4 in)	73 years	40 of 100 (Notable)
20 April 1999	Nuwara Eliya, LK	daily high min	14.5 C (58.1 F)	0.2 C (0.4 F)	108 years	40 of 100 (Notable)
20 April 1999	Heber, US	daily high min	7.2 C (45.0 F)	0.5 C (0.9 F)	96 years	40 of 100 (Notable)
20 April 1999	Vytegra, RU	daily high max	22.9 C (73.2 F)	3.0 C (5.4 F)	85 years	39 of 100 (Notable)
20 April 1999	Dyce, GB	daily rain	29.0 mm (1.1 in)	14.6 mm (0.6 in)	10 years	39 of 100 (Notable)
20 April 1999	Nuwara Eliya, LK	daily low max	16.9 C (62.4 F)	2.3 C (4.1 F)	46 years	38 of 100 (Notable)
20 April 1999	Lugo/Rozas, ES	daily rain	31.0 mm (1.2 in)	21.6 mm (0.9 in)	5 years	38 of 100 (Notable)
20 April 1999	Burketown Post Office, AU	daily high min	26.0 C (78.8 F)	0.1 C (0.2 F)	90 years	37 of 100 (Notable)
20 April 1999	Union de San Antonio, MX	daily high max	40.6 C (105.1 F)	7.8 C (14.0 F)	37 years	37 of 100 (Notable)
20 April 1999	Velikie Luki, RU	daily high min	8.9 C (48.0 F)	0.3 C (0.5 F)	92 years	37 of 100 (Notable)
20 April 1999	Live Oak, US	daily low min	3.9 C (39.0 F)	0.5 C (0.9 F)	88 years	37 of 100 (Notable)
20 April 1999	Snake Creek Powerhouse, US	daily high min	7.2 C (45.0 F)	1.1 C (2.0 F)	84 years	35 of 100 (Notable)
20 April 1999	Cairns Post Office, AU	daily low max	25.2 C (77.4 F)	0.4 C (0.7 F)	76 years	34 of 100 (Routine)
20 April 1999	Reboly, RU	monthly high max	19.5 C (67.1 F)	0.8 C (1.4 F)	47 years	34 of 100 (Routine)

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

1807 to 1999

Records set or tied on this calendar date in each year from 1807 to 1999. 1999 had 674 records.

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

Records on 04-20 in each year
Year	Records
1807	3
1817	1
1838	1
1849	2
1851	1
1852	4
1854	1
1858	1
1860	1
1864	1
1865	3
1868	1
1869	1
1870	1
1872	1
1874	3
1875	4
1876	1
1878	2
1880	2
1881	2
1884	1
1885	1
1886	2
1889	1
1891	2
1892	1
1893	6
1894	8
1895	7
1896	3
1897	6
1898	1
1899	1
1901	8
1902	3
1903	14
1904	31
1905	9
1906	12
1907	18
1908	14
1909	22
1910	25
1911	18
1912	12
1913	19
1914	46
1915	45
1916	19
1917	33
1918	42
1919	17
1920	49
1921	27
1922	40
1923	157
1924	113
1925	169
1926	310
1927	442
1928	212
1929	182
1930	87
1931	255
1932	166
1933	279
1934	384
1935	384
1936	311
1937	427
1938	339
1939	158
1940	519
1941	558
1942	223
1943	670
1944	304
1945	391
1946	395
1947	308
1948	493
1949	477
1950	329
1951	690
1952	552
1953	1,071
1954	377
1955	623
1956	384
1957	730
1958	327
1959	563
1960	472
1961	1,078
1962	487
1963	595
1964	749
1965	724
1966	1,174
1967	864
1968	975
1969	382
1970	948
1971	765
1972	531
1973	982
1974	673
1975	344
1976	661
1977	693
1978	800
1979	495
1980	1,539
1981	706
1982	906
1983	1,844
1984	922
1985	1,140
1986	770
1987	1,447
1988	1,144
1989	1,187
1990	1,495
1991	1,075
1992	1,009
1993	772
1994	756
1995	1,351
1996	970
1997	833
1998	1,490
1999	674
2000	931
2001	752
2002	1,081
2003	758
2004	567
2005	707
2006	859
2007	582
2008	1,110
2009	845
2010	693
2011	1,477
2012	726
2013	1,520
2014	384
2015	702
2016	650
2017	734
2018	1,309
2019	1,019
2020	449
2021	1,215
2022	596
2023	828
2024	673
2025	836
2026	533

Download the Data

Data for records on 1999-04-20: 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 25	506
25 to 50	5
50 to 75	1
75 to 100	0
100 to 125	0
125 to 150	0
150 to 175	0
175 to 200	2