Weather Records on 17 April 1999

1,730 weather records were set or tied worldwide on 17 April 1999. Highest significance: Greifswald, DE.

Key Facts for 17 April 1999

On 17 April 1999, 1,730 weather records were set or tied at long-record stations worldwide.
362 were record highs and 979 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 60 monthly and 1,669 daily.
Greifswald set a daily record precipitation of 28.6 mm (1.1 in) on 17 April 1999.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 445 records.

Record Map

1,730 stations

1,730 station records on 17 April 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Greifswald	Germany	Record daily precipitation	28.6 mm (1.1 in)	68 of 100 (Major)
Ueckermunde	Germany	Record daily precipitation	26.0 mm (1.0 in)	63 of 100 (Major)
Harstena	Sweden	Record daily precipitation	36.4 mm (1.4 in)	59 of 100 (Notable)
Chilapa (Dge)	Mexico	Record daily precipitation	37.8 mm (1.5 in)	57 of 100 (Notable)
Holmbo_D	Sweden	Record daily precipitation	27.0 mm (1.1 in)	57 of 100 (Notable)
Gazandzhyk	Turkmenistan	Record daily precipitation	89.9 mm (3.5 in)	57 of 100 (Notable)
Arkona	Germany	Record daily precipitation	28.4 mm (1.1 in)	56 of 100 (Notable)
Grindsjon	Sweden	Record daily precipitation	35.0 mm (1.4 in)	56 of 100 (Notable)
Osteraker	Sweden	Record daily precipitation	25.8 mm (1.0 in)	56 of 100 (Notable)
Uppsala_Aut	Sweden	Record daily precipitation	28.9 mm (1.1 in)	55 of 100 (Notable)
Vallentuna	Sweden	Record daily precipitation	26.5 mm (1.0 in)	53 of 100 (Notable)
Bambui	Brazil	Record daily precipitation	46.6 mm (1.8 in)	52 of 100 (Notable)
Tullinge A	Sweden	Record daily precipitation	26.8 mm (1.1 in)	52 of 100 (Notable)
Zinnowitz	Germany	Record daily precipitation	26.8 mm (1.1 in)	51 of 100 (Notable)
Soderkoping	Sweden	Record daily precipitation	29.6 mm (1.2 in)	51 of 100 (Notable)
Putbus	Germany	Record daily precipitation	30.6 mm (1.2 in)	49 of 100 (Notable)
Arcadia	United States	Record low maximum temperature	17.8 C (64.0 F)	49 of 100 (Notable)
Anklam	Germany	Record daily precipitation	27.5 mm (1.1 in)	48 of 100 (Notable)
Enkoping	Sweden	Record daily precipitation	31.9 mm (1.3 in)	48 of 100 (Notable)
Chula Vista	United States	Record high maximum temperature	29.4 C (84.9 F)	48 of 100 (Notable)
Newport Beach Harbor	United States	Record high maximum temperature	30.0 C (86.0 F)	48 of 100 (Notable)
Chilapa (Smn)	Mexico	Record daily precipitation	37.8 mm (1.5 in)	47 of 100 (Notable)
Oxelosund	Sweden	Record daily precipitation	27.0 mm (1.1 in)	47 of 100 (Notable)
Ada	Sweden	Record daily precipitation	31.6 mm (1.2 in)	47 of 100 (Notable)
Sala	Sweden	Record daily precipitation	28.7 mm (1.1 in)	47 of 100 (Notable)
Dralinge	Sweden	Record daily precipitation	29.5 mm (1.2 in)	47 of 100 (Notable)
Marviken	Sweden	Record daily precipitation	33.5 mm (1.3 in)	46 of 100 (Notable)
Crescent City	United States	Record low maximum temperature	14.4 C (57.9 F)	46 of 100 (Notable)
Overum	Sweden	Record daily precipitation	25.6 mm (1.0 in)	45 of 100 (Notable)
Frandesta	Sweden	Record daily precipitation	32.0 mm (1.3 in)	45 of 100 (Notable)
Sodertalje	Sweden	Record daily precipitation	33.0 mm (1.3 in)	45 of 100 (Notable)
Grapevine Dam	United States	Record low minimum temperature	0.6 C (33.1 F)	45 of 100 (Notable)
Resplendor-Jusante	Brazil	Record daily precipitation	67.5 mm (2.7 in)	44 of 100 (Notable)
Vrena	Sweden	Record daily precipitation	30.0 mm (1.2 in)	44 of 100 (Notable)
Untra	Sweden	Record daily precipitation	26.0 mm (1.0 in)	44 of 100 (Notable)
Paola	United States	Record low maximum temperature	8.3 C (46.9 F)	44 of 100 (Notable)
Waskish 4NE	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Windsor	United States	Record low maximum temperature	7.2 C (45.0 F)	44 of 100 (Notable)
Titusville	United States	Record low maximum temperature	17.2 C (63.0 F)	43 of 100 (Notable)
Lichtentanne	Germany	Record low maximum temperature	3.5 C (38.3 F)	42 of 100 (Notable)
Palenque (Dge)	Mexico	Record high minimum temperature	30.6 C (87.1 F)	42 of 100 (Notable)
Indianola 1SW	United States	Record daily snowfall	5.1 cm (2.0 in)	42 of 100 (Notable)
New Iberia AP - Acadiana Rgnl	United States	Record low maximum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Tahlequah	United States	Record low maximum temperature	11.7 C (53.1 F)	42 of 100 (Notable)
Voru	Estonia	Record high minimum temperature	13.2 C (55.8 F)	41 of 100 (Notable)
Norrby_S	Sweden	Record daily precipitation	26.1 mm (1.0 in)	41 of 100 (Notable)
Rocky Ford 2 SE	United States	Record low minimum temperature	-5.6 C (21.9 F)	41 of 100 (Notable)
Elk	United States	Record low minimum temperature	-5.6 C (21.9 F)	41 of 100 (Notable)
Philo 3 SW	United States	Record low maximum temperature	3.3 C (37.9 F)	41 of 100 (Notable)
Drain	United States	Record high maximum temperature	30.0 C (86.0 F)	41 of 100 (Notable)
Alicia 2 NNE	United States	Record low maximum temperature	10.6 C (51.1 F)	40 of 100 (Notable)
Leroy 5 WSW	United States	Record low minimum temperature	-8.9 C (16.0 F)	40 of 100 (Notable)
St. Petersburg	Russia	Record high minimum temperature	12.2 C (54.0 F)	39 of 100 (Notable)
Harsfjarden	Sweden	Record daily precipitation	30.8 mm (1.2 in)	39 of 100 (Notable)
Ultuna	Sweden	Record daily precipitation	32.2 mm (1.3 in)	39 of 100 (Notable)
Clarinda	United States	Record low maximum temperature	2.2 C (36.0 F)	39 of 100 (Notable)
Creston 2 SW	United States	Record low maximum temperature	2.2 C (36.0 F)	39 of 100 (Notable)
Carrollton	United States	Record low maximum temperature	7.2 C (45.0 F)	39 of 100 (Notable)
Marshall	United States	Record low maximum temperature	5.0 C (41.0 F)	39 of 100 (Notable)
Nynashamn	Sweden	Record daily precipitation	30.5 mm (1.2 in)	38 of 100 (Notable)

Counts by Type and Timescale

1,730 records

Records set or tied on 17 April 1999 by type: Highest daily maximum 227, Lowest daily maximum 611, Highest daily minimum 135, Lowest daily minimum 368, Heaviest daily rainfall 342, Heaviest daily snowfall 19, Deepest snow cover 28.

Records on 17 April 1999 by type
Record type	Records
Highest daily maximum	227
Lowest daily maximum	611
Highest daily minimum	135
Lowest daily minimum	368
Heaviest daily rainfall	342
Heaviest daily snowfall	19
Deepest snow cover	28

Records on 17 April 1999 by timescale: all-time 1, monthly 60, daily 1,669.

How Much Records Were Beaten By

1,417 broken records

Margins by which the 1,417 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

17 April 1999

Top 20 records on 17 April 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1999	Greifswald, DE	daily rain	28.6 mm (1.1 in)	15.5 mm (0.6 in)	62 years	68 of 100 (Major)
17 April 1999	Ueckermunde, DE	daily rain	26.0 mm (1.0 in)	12.9 mm (0.5 in)	62 years	63 of 100 (Major)
17 April 1999	Harstena, SE	daily rain	36.4 mm (1.4 in)	28.2 mm (1.1 in)	48 years	59 of 100 (Notable)
17 April 1999	Chilapa (Dge), MX	daily rain	37.8 mm (1.5 in)	35.0 mm (1.4 in)	36 years	57 of 100 (Notable)
17 April 1999	Holmbo_D, SE	daily rain	27.0 mm (1.1 in)	19.2 mm (0.8 in)	42 years	57 of 100 (Notable)
17 April 1999	Gazandzhyk, TM	monthly rain	89.9 mm (3.5 in)	64.0 mm (2.5 in)	4 years	57 of 100 (Notable)
17 April 1999	Arkona, DE	daily rain	28.4 mm (1.1 in)	17.5 mm (0.7 in)	33 years	56 of 100 (Notable)
17 April 1999	Grindsjon, SE	daily rain	35.0 mm (1.4 in)	20.4 mm (0.8 in)	42 years	56 of 100 (Notable)
17 April 1999	Osteraker, SE	daily rain	25.8 mm (1.0 in)	15.8 mm (0.6 in)	42 years	56 of 100 (Notable)
17 April 1999	Uppsala_Aut, SE	monthly rain	28.9 mm (1.1 in)	1.9 mm (0.07 in)	147 years	55 of 100 (Notable)
17 April 1999	Vallentuna, SE	daily rain	26.5 mm (1.0 in)	17.6 mm (0.7 in)	32 years	53 of 100 (Notable)
17 April 1999	Bambui, BR	daily rain	46.6 mm (1.8 in)	38.4 mm (1.5 in)	52 years	52 of 100 (Notable)
17 April 1999	Tullinge A, SE	monthly rain	26.8 mm (1.1 in)	8.7 mm (0.34 in)	45 years	52 of 100 (Notable)
17 April 1999	Zinnowitz, DE	daily rain	26.8 mm (1.1 in)	20.6 mm (0.8 in)	28 years	51 of 100 (Notable)
17 April 1999	Soderkoping, SE	daily rain	29.6 mm (1.2 in)	25.7 mm (1.0 in)	25 years	51 of 100 (Notable)
17 April 1999	Putbus, DE	monthly rain	30.6 mm (1.2 in)	0.5 mm (0.02 in)	95 years	49 of 100 (Notable)
17 April 1999	Arcadia, US	daily low max	17.8 C (64.0 F)	3.3 C (5.9 F)	96 years	49 of 100 (Notable)
17 April 1999	Anklam, DE	daily rain	27.5 mm (1.1 in)	10.6 mm (0.4 in)	33 years	48 of 100 (Notable)
17 April 1999	Enkoping, SE	monthly rain	31.9 mm (1.3 in)	6.9 mm (0.27 in)	52 years	48 of 100 (Notable)
17 April 1999	Chula Vista, US	daily high max	29.4 C (84.9 F)	6.6 C (11.9 F)	61 years	48 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

1799 to 1999

Records set or tied on this calendar date in each year from 1799 to 1999. 1999 had 1,730 records.

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

Records on 04-17 in each year
Year	Records
1799	1
1807	1
1808	1
1815	1
1817	1
1818	1
1819	1
1823	1
1825	1
1830	1
1835	3
1837	1
1845	1
1847	2
1851	1
1852	3
1853	1
1854	1
1855	1
1857	1
1858	1
1862	1
1865	2
1868	1
1873	4
1874	1
1875	3
1877	4
1878	2
1880	2
1889	1
1890	2
1891	2
1892	4
1894	5
1895	1
1896	5
1897	6
1898	3
1899	1
1900	2
1901	4
1902	4
1903	5
1904	19
1905	11
1906	14
1907	16
1908	38
1909	7
1910	29
1911	33
1912	27
1913	20
1914	83
1915	30
1916	30
1917	32
1918	35
1919	39
1920	87
1921	148
1922	96
1923	71
1924	74
1925	103
1926	140
1927	256
1928	308
1929	145
1930	238
1931	216
1932	615
1933	261
1934	234
1935	374
1936	308
1937	439
1938	564
1939	618
1940	337
1941	460
1942	415
1943	285
1944	334
1945	475
1946	492
1947	461
1948	622
1949	439
1950	293
1951	441
1952	529
1953	818
1954	650
1955	394
1956	486
1957	277
1958	702
1959	434
1960	553
1961	667
1962	597
1963	702
1964	766
1965	411
1966	409
1967	935
1968	745
1969	728
1970	547
1971	924
1972	546
1973	589
1974	244
1975	666
1976	1,630
1977	906
1978	620
1979	810
1980	675
1981	621
1982	965
1983	1,365
1984	720
1985	917
1986	997
1987	960
1988	1,082
1989	638
1990	1,065
1991	614
1992	1,105
1993	847
1994	1,047
1995	1,211
1996	1,044
1997	889
1998	1,795
1999	1,730
2000	1,082
2001	1,013
2002	2,284
2003	1,037
2004	761
2005	572
2006	1,430
2007	863
2008	842
2009	779
2010	606
2011	982
2012	920
2013	1,796
2014	913
2015	813
2016	977
2017	469
2018	1,585
2019	458
2020	1,165
2021	701
2022	831
2023	628
2024	690
2025	1,058
2026	838

Download the Data

Data for records on 1999-04-17: 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 50	1,403
50 to 100	10
100 to 150	2
150 to 200	1
200 to 250	1