Weather Records on 18 April 1999

1,428 weather records were set or tied worldwide on 18 April 1999. Highest significance: Varberg, SE.

Key Facts for 18 April 1999

On 18 April 1999, 1,428 weather records were set or tied at long-record stations worldwide.
390 were record highs and 677 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 89 monthly and 1,337 daily.
Varberg set a daily record precipitation of 30.0 mm (1.2 in) on 18 April 1999.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

1,428 stations

1,428 station records on 18 April 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Varberg	Sweden	Record daily precipitation	30.0 mm (1.2 in)	75 of 100 (Major)
Flahult	Sweden	Record daily precipitation	34.9 mm (1.4 in)	72 of 100 (Major)
Kilagarden	Sweden	Record daily precipitation	48.0 mm (1.9 in)	70 of 100 (Major)
Traneberg	Sweden	Record daily precipitation	55.6 mm (2.2 in)	70 of 100 (Major)
Halden	Norway	Record daily precipitation	39.0 mm (1.5 in)	68 of 100 (Major)
Kavsjo_D	Sweden	Record daily precipitation	37.5 mm (1.5 in)	65 of 100 (Major)
Moreton Telegraph Station	Australia	Record daily precipitation	84.0 mm (3.3 in)	63 of 100 (Major)
Barkakra	Sweden	Record daily precipitation	31.6 mm (1.2 in)	61 of 100 (Major)
Rossared	Sweden	Record daily precipitation	50.2 mm (2.0 in)	61 of 100 (Major)
San Francisco	Mexico	Record daily precipitation	94.5 mm (3.7 in)	60 of 100 (Major)
Simonstorp	Sweden	Record daily precipitation	42.2 mm (1.7 in)	58 of 100 (Notable)
Harnosand	Sweden	Record daily precipitation	31.3 mm (1.2 in)	55 of 100 (Notable)
Gendalen	Sweden	Record daily precipitation	46.5 mm (1.8 in)	55 of 100 (Notable)
Save	Sweden	Record daily precipitation	33.3 mm (1.3 in)	54 of 100 (Notable)
Lund	Sweden	Record daily precipitation	36.3 mm (1.4 in)	54 of 100 (Notable)
Huskvarna	Sweden	Record daily precipitation	36.2 mm (1.4 in)	54 of 100 (Notable)
Junsele	Sweden	Record daily precipitation	27.0 mm (1.1 in)	54 of 100 (Notable)
Vanersborg	Sweden	Record daily precipitation	32.8 mm (1.3 in)	53 of 100 (Notable)
Havelund	Sweden	Record daily precipitation	29.3 mm (1.2 in)	53 of 100 (Notable)
Cape Agulhas	South Africa	Record daily precipitation	39.0 mm (1.5 in)	50 of 100 (Notable)
Genevad	Sweden	Record daily precipitation	38.8 mm (1.5 in)	50 of 100 (Notable)
Satenas	Sweden	Record daily precipitation	40.1 mm (1.6 in)	48 of 100 (Notable)
Ulvsjo	Sweden	Record daily precipitation	26.3 mm (1.0 in)	48 of 100 (Notable)
Torup	Sweden	Record daily precipitation	41.0 mm (1.6 in)	47 of 100 (Notable)
Boras	Sweden	Record daily precipitation	35.2 mm (1.4 in)	47 of 100 (Notable)
Langjum	Sweden	Record daily precipitation	31.8 mm (1.3 in)	47 of 100 (Notable)
Huetamo	Mexico	Record low maximum temperature	30.6 C (87.1 F)	46 of 100 (Notable)
Svalov	Sweden	Record daily precipitation	27.4 mm (1.1 in)	46 of 100 (Notable)
Uplo	Sweden	Record daily precipitation	33.2 mm (1.3 in)	46 of 100 (Notable)
Backefors	Sweden	Record daily precipitation	37.3 mm (1.5 in)	46 of 100 (Notable)
Gunnesbyn	Sweden	Record daily precipitation	28.2 mm (1.1 in)	46 of 100 (Notable)
Jonkopings_Flygplats	Sweden	Record daily precipitation	35.0 mm (1.4 in)	45 of 100 (Notable)
Halmstad	Sweden	Record daily precipitation	31.2 mm (1.2 in)	45 of 100 (Notable)
Forserum	Sweden	Record daily precipitation	32.5 mm (1.3 in)	45 of 100 (Notable)
Skara 1	Sweden	Record daily precipitation	40.2 mm (1.6 in)	45 of 100 (Notable)
Tyler Pounds Fld	United States	Record low minimum temperature	2.2 C (36.0 F)	45 of 100 (Notable)
Morko	Sweden	Record daily precipitation	30.5 mm (1.2 in)	44 of 100 (Notable)
Visingso	Sweden	Record daily precipitation	25.7 mm (1.0 in)	44 of 100 (Notable)
Kumejima	Japan	Record daily precipitation	120.9 mm (4.8 in)	43 of 100 (Notable)
Skillingaryd	Sweden	Record daily precipitation	35.7 mm (1.4 in)	43 of 100 (Notable)
Chula Vista	United States	Record high maximum temperature	28.9 C (84.0 F)	43 of 100 (Notable)
Mc Minnville	United States	Record low minimum temperature	-3.3 C (26.1 F)	43 of 100 (Notable)
Gillastig	Sweden	Record daily precipitation	31.0 mm (1.2 in)	42 of 100 (Notable)
Brunnshult	Sweden	Record daily precipitation	55.2 mm (2.2 in)	42 of 100 (Notable)
Hid	Sweden	Record daily precipitation	36.2 mm (1.4 in)	42 of 100 (Notable)
Alingsas_D	Sweden	Record daily precipitation	34.6 mm (1.4 in)	42 of 100 (Notable)
Inverness 3 SE	United States	Record low maximum temperature	20.6 C (69.1 F)	42 of 100 (Notable)
Madison	United States	Record low minimum temperature	2.2 C (36.0 F)	42 of 100 (Notable)
Athens	United States	Record low minimum temperature	2.2 C (36.0 F)	42 of 100 (Notable)
Brackettville	United States	Record low minimum temperature	0.6 C (33.1 F)	42 of 100 (Notable)
Osby	Sweden	Record daily precipitation	33.7 mm (1.3 in)	41 of 100 (Notable)
Horda	Sweden	Record daily precipitation	27.6 mm (1.1 in)	41 of 100 (Notable)
Karlsborg_Mo	Sweden	Record daily precipitation	26.0 mm (1.0 in)	41 of 100 (Notable)
Mena	United States	Record low minimum temperature	-0.6 C (30.9 F)	41 of 100 (Notable)
Ruston la Tech	United States	Record low minimum temperature	1.7 C (35.1 F)	41 of 100 (Notable)
Ripley	United States	Record low maximum temperature	12.2 C (54.0 F)	41 of 100 (Notable)
Horby	Sweden	Record daily precipitation	29.8 mm (1.2 in)	40 of 100 (Notable)
Hylletofta	Sweden	Record daily precipitation	26.8 mm (1.1 in)	40 of 100 (Notable)
Bollebygd	Sweden	Record daily precipitation	41.0 mm (1.6 in)	40 of 100 (Notable)
Stomne	Sweden	Record daily precipitation	40.4 mm (1.6 in)	40 of 100 (Notable)

Counts by Type and Timescale

1,428 records

Records set or tied on 18 April 1999 by type: Highest daily maximum 246, Lowest daily maximum 301, Highest daily minimum 144, Lowest daily minimum 376, Heaviest daily rainfall 355, Deepest snow cover 6.

Records on 18 April 1999 by type
Record type	Records
Highest daily maximum	246
Lowest daily maximum	301
Highest daily minimum	144
Lowest daily minimum	376
Heaviest daily rainfall	355
Heaviest daily snowfall	0
Deepest snow cover	6

Records on 18 April 1999 by timescale: all-time 2, monthly 89, daily 1,337.

How Much Records Were Beaten By

1,169 broken records

Margins by which the 1,169 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 177.0. Ties are not counted.

Top 20 by Significance

18 April 1999

Top 20 records on 18 April 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1999	Varberg, SE	daily rain	30.0 mm (1.2 in)	13.5 mm (0.5 in)	108 years	75 of 100 (Major)
18 April 1999	Flahult, SE	daily rain	34.9 mm (1.4 in)	18.9 mm (0.7 in)	78 years	72 of 100 (Major)
18 April 1999	Kilagarden, SE	monthly rain	48.0 mm (1.9 in)	18.0 mm (0.7 in)	50 years	70 of 100 (Major)
18 April 1999	Traneberg, SE	monthly rain	55.6 mm (2.2 in)	27.5 mm (1.1 in)	50 years	70 of 100 (Major)
18 April 1999	Halden, NO	daily rain	39.0 mm (1.5 in)	18.3 mm (0.7 in)	64 years	68 of 100 (Major)
18 April 1999	Kavsjo_D, SE	monthly rain	37.5 mm (1.5 in)	16.5 mm (0.6 in)	34 years	65 of 100 (Major)
18 April 1999	Moreton Telegraph Station, AU	daily rain	84.0 mm (3.3 in)	45.9 mm (1.8 in)	84 years	63 of 100 (Major)
18 April 1999	Barkakra, SE	monthly rain	31.6 mm (1.2 in)	12.1 mm (0.5 in)	40 years	61 of 100 (Major)
18 April 1999	Rossared, SE	monthly rain	50.2 mm (2.0 in)	26.0 mm (1.0 in)	21 years	61 of 100 (Major)
18 April 1999	San Francisco, MX	monthly rain	94.5 mm (3.7 in)	40.4 mm (1.6 in)	20 years	60 of 100 (Major)
18 April 1999	Simonstorp, SE	monthly rain	42.2 mm (1.7 in)	15.5 mm (0.6 in)	14 years	58 of 100 (Notable)
18 April 1999	Harnosand, SE	daily rain	31.3 mm (1.2 in)	12.8 mm (0.5 in)	77 years	55 of 100 (Notable)
18 April 1999	Gendalen, SE	monthly rain	46.5 mm (1.8 in)	23.8 mm (0.9 in)	7 years	55 of 100 (Notable)
18 April 1999	Save, SE	monthly rain	33.3 mm (1.3 in)	10.9 mm (0.4 in)	50 years	54 of 100 (Notable)
18 April 1999	Lund, SE	daily rain	36.3 mm (1.4 in)	6.0 mm (0.24 in)	119 years	54 of 100 (Notable)
18 April 1999	Huskvarna, SE	monthly rain	36.2 mm (1.4 in)	4.7 mm (0.19 in)	80 years	54 of 100 (Notable)
18 April 1999	Junsele, SE	monthly rain	27.0 mm (1.1 in)	5.9 mm (0.23 in)	52 years	54 of 100 (Notable)
18 April 1999	Vanersborg, SE	daily rain	32.8 mm (1.3 in)	6.1 mm (0.24 in)	101 years	53 of 100 (Notable)
18 April 1999	Havelund, SE	daily rain	29.3 mm (1.2 in)	21.9 mm (0.9 in)	28 years	53 of 100 (Notable)
18 April 1999	Cape Agulhas, ZA	daily rain	39.0 mm (1.5 in)	24.0 mm (0.9 in)	48 years	50 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 1,428 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1999-04-18: 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	1,148
25 to 50	15
50 to 75	2
75 to 100	2
100 to 125	0
125 to 150	0
150 to 175	1
175 to 200	1