Weather Records on 20 May 1999

673 weather records were set or tied worldwide on 20 May 1999. Highest significance: Double Island Point Lighthouse, AU.

Key Facts for 20 May 1999

On 20 May 1999, 673 weather records were set or tied at long-record stations worldwide.
211 were record highs and 182 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 659 daily.
Double Island Point Lighthouse set a daily record precipitation of 120.0 mm (4.7 in) on 20 May 1999.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 454 records.

Record Map

673 stations

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

Weather records on 20 May 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Double Island Point Lighthouse	Australia	Record daily precipitation	120.0 mm (4.7 in)	74 of 100 (Major)
Heath	United States	Record daily precipitation	75.4 mm (3.0 in)	64 of 100 (Major)
Nelson	United States	Record daily precipitation	63.2 mm (2.5 in)	64 of 100 (Major)
Keene	United States	Record daily precipitation	82.6 mm (3.3 in)	64 of 100 (Major)
Szombathely	Hungary	Record daily precipitation	39.7 mm (1.6 in)	62 of 100 (Major)
Woodstock	United States	Record daily precipitation	72.1 mm (2.8 in)	62 of 100 (Major)
W Otis	United States	Record daily precipitation	69.1 mm (2.7 in)	61 of 100 (Major)
Eumundi - Crescent Rd	Australia	Record daily precipitation	91.2 mm (3.6 in)	59 of 100 (Notable)
Mauth-Finsterau	Germany	Record daily precipitation	50.1 mm (2.0 in)	59 of 100 (Notable)
Hanover	United States	Record daily precipitation	51.8 mm (2.0 in)	59 of 100 (Notable)
Cooroy Composite	Australia	Record daily precipitation	71.6 mm (2.8 in)	54 of 100 (Notable)
Moreton Sugar Mill	Australia	Record daily precipitation	91.0 mm (3.6 in)	54 of 100 (Notable)
Barkhamsted	United States	Record daily precipitation	62.7 mm (2.5 in)	54 of 100 (Notable)
Milford	United States	Record daily precipitation	43.4 mm (1.7 in)	53 of 100 (Notable)
Kr.Rottal-Inn Falkenberg	Germany	Record daily precipitation	42.8 mm (1.7 in)	51 of 100 (Notable)
Round Pond	United States	Record daily precipitation	86.4 mm (3.4 in)	51 of 100 (Notable)
Yladgee	Australia	Record daily precipitation	26.5 mm (1.0 in)	50 of 100 (Notable)
Preobrazhenie	Russia	Record daily precipitation	60.7 mm (2.4 in)	50 of 100 (Notable)
Long Valley	United States	Record daily precipitation	79.5 mm (3.1 in)	50 of 100 (Notable)
Nambour Bowling Club	Australia	Record daily precipitation	96.2 mm (3.8 in)	49 of 100 (Notable)
Amamoor Forestry	Australia	Record daily precipitation	48.8 mm (1.9 in)	48 of 100 (Notable)
Beloit	United States	Record daily precipitation	47.2 mm (1.9 in)	48 of 100 (Notable)
Somerville 4 NW	United States	Record daily precipitation	42.9 mm (1.7 in)	48 of 100 (Notable)
Trostberg	Germany	Record daily precipitation	49.7 mm (2.0 in)	47 of 100 (Notable)
Montville "Craglands"	Australia	Record daily precipitation	85.8 mm (3.4 in)	46 of 100 (Notable)
Nambour Dpi	Australia	Record daily precipitation	89.4 mm (3.5 in)	46 of 100 (Notable)
Frankfort	United States	Record daily precipitation	68.8 mm (2.7 in)	46 of 100 (Notable)
Lancaster	United States	Record daily precipitation	37.3 mm (1.5 in)	46 of 100 (Notable)
Murska Sobota-Rakican	Slovenia	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Pinkham Notch	United States	Record daily precipitation	58.4 mm (2.3 in)	45 of 100 (Notable)
Augsburg (Sankt Stephan)	Germany	Record daily precipitation	36.7 mm (1.4 in)	44 of 100 (Notable)
Zavizan	Croatia	Record daily precipitation	93.7 mm (3.7 in)	44 of 100 (Notable)
Wien	Austria	Record daily precipitation	49.2 mm (1.9 in)	42 of 100 (Notable)
Gospic	Croatia	Record daily precipitation	43.8 mm (1.7 in)	42 of 100 (Notable)
Ogulin	Croatia	Record daily precipitation	68.0 mm (2.7 in)	42 of 100 (Notable)
Eastport	United States	Record daily precipitation	30.0 mm (1.2 in)	42 of 100 (Notable)
Grafton	United States	Record daily precipitation	32.5 mm (1.3 in)	42 of 100 (Notable)
Lakeport 2	United States	Record daily precipitation	38.4 mm (1.5 in)	42 of 100 (Notable)
Yandina Post Office	Australia	Record daily precipitation	78.6 mm (3.1 in)	40 of 100 (Notable)
Cape St. Francis	South Africa	Record daily precipitation	39.0 mm (1.5 in)	40 of 100 (Notable)
Rocky Rvr Dam	United States	Record daily precipitation	101.1 mm (4.0 in)	40 of 100 (Notable)
Matamoras	United States	Record daily precipitation	30.5 mm (1.2 in)	40 of 100 (Notable)
Cavendish	United States	Record daily precipitation	60.2 mm (2.4 in)	40 of 100 (Notable)
Whittier	United States	Record snow depth	109.2 cm (43.0 in)	40 of 100 (Notable)
Salzburg	Austria	Record daily precipitation	44.9 mm (1.8 in)	39 of 100 (Notable)
Metten	Germany	Record daily precipitation	25.7 mm (1.0 in)	39 of 100 (Notable)
Lawrence	United States	Record daily precipitation	33.0 mm (1.3 in)	39 of 100 (Notable)
Mt Sunapee	United States	Record daily precipitation	50.5 mm (2.0 in)	39 of 100 (Notable)
Gilman	United States	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Peru	United States	Record daily precipitation	60.2 mm (2.4 in)	39 of 100 (Notable)
Saint Johnsbury	United States	Record daily precipitation	41.1 mm (1.6 in)	39 of 100 (Notable)
Simbach/Inn	Germany	Record daily precipitation	47.1 mm (1.9 in)	38 of 100 (Notable)
Woonsocket	United States	Record daily precipitation	38.1 mm (1.5 in)	38 of 100 (Notable)
Rochester	United States	Record daily precipitation	34.3 mm (1.4 in)	38 of 100 (Notable)
Sotchi	Russia	Record low minimum temperature	5.8 C (42.4 F)	37 of 100 (Notable)
Canaan	United States	Record daily precipitation	40.9 mm (1.6 in)	37 of 100 (Notable)
Hardwick	United States	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Yorktown Hts 1W	United States	Record daily precipitation	54.9 mm (2.2 in)	36 of 100 (Notable)
San Salvador El Seco	Mexico	Record low minimum temperature	-2.2 C (28.0 F)	35 of 100 (Notable)
Kenton	United States	Record high minimum temperature	18.9 C (66.0 F)	35 of 100 (Notable)

Counts by Type and Timescale

673 records

Records set or tied on 20 May 1999 by type: Highest daily maximum 125, Lowest daily maximum 48, Highest daily minimum 86, Lowest daily minimum 134, Heaviest daily rainfall 278, Deepest snow cover 2.

Records on 20 May 1999 by type
Record type	Records
Highest daily maximum	125
Lowest daily maximum	48
Highest daily minimum	86
Lowest daily minimum	134
Heaviest daily rainfall	278
Heaviest daily snowfall	0
Deepest snow cover	2

Records on 20 May 1999 by timescale: all-time 0, monthly 14, daily 659.

How Much Records Were Beaten By

549 broken records

Margins by which the 549 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 787.0. Ties are not counted.

Top 20 by Significance

20 May 1999

Top 20 records on 20 May 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1999	Double Island Point Lighthouse, AU	daily rain	120.0 mm (4.7 in)	89.3 mm (3.5 in)	80 years	74 of 100 (Major)
20 May 1999	Heath, US	daily rain	75.4 mm (3.0 in)	49.0 mm (1.9 in)	56 years	64 of 100 (Major)
20 May 1999	Nelson, US	daily rain	63.2 mm (2.5 in)	40.1 mm (1.6 in)	60 years	64 of 100 (Major)
20 May 1999	Keene, US	daily rain	82.6 mm (3.3 in)	56.2 mm (2.2 in)	49 years	64 of 100 (Major)
20 May 1999	Szombathely, HU	daily rain	39.7 mm (1.6 in)	18.9 mm (0.7 in)	90 years	62 of 100 (Major)
20 May 1999	Woodstock, US	daily rain	72.1 mm (2.8 in)	42.6 mm (1.7 in)	41 years	62 of 100 (Major)
20 May 1999	W Otis, US	daily rain	69.1 mm (2.7 in)	48.8 mm (1.9 in)	49 years	61 of 100 (Major)
20 May 1999	Eumundi - Crescent Rd, AU	daily rain	91.2 mm (3.6 in)	70.9 mm (2.8 in)	52 years	59 of 100 (Notable)
20 May 1999	Mauth-Finsterau, DE	daily rain	50.1 mm (2.0 in)	32.7 mm (1.3 in)	49 years	59 of 100 (Notable)
20 May 1999	Hanover, US	daily rain	51.8 mm (2.0 in)	17.0 mm (0.7 in)	106 years	59 of 100 (Notable)
20 May 1999	Cooroy Composite, AU	daily rain	71.6 mm (2.8 in)	54.3 mm (2.1 in)	52 years	54 of 100 (Notable)
20 May 1999	Moreton Sugar Mill, AU	daily rain	91.0 mm (3.6 in)	74.7 mm (2.9 in)	58 years	54 of 100 (Notable)
20 May 1999	Barkhamsted, US	daily rain	62.7 mm (2.5 in)	38.8 mm (1.5 in)	48 years	54 of 100 (Notable)
20 May 1999	Milford, US	daily rain	43.4 mm (1.7 in)	26.9 mm (1.1 in)	49 years	53 of 100 (Notable)
20 May 1999	Kr.Rottal-Inn Falkenberg, DE	daily rain	42.8 mm (1.7 in)	25.0 mm (1.0 in)	26 years	51 of 100 (Notable)
20 May 1999	Round Pond, US	daily rain	86.4 mm (3.4 in)	52.1 mm (2.1 in)	32 years	51 of 100 (Notable)
20 May 1999	Yladgee, AU	daily rain	26.5 mm (1.0 in)	21.2 mm (0.8 in)	20 years	50 of 100 (Notable)
20 May 1999	Preobrazhenie, RU	daily rain	60.7 mm (2.4 in)	37.8 mm (1.5 in)	26 years	50 of 100 (Notable)
20 May 1999	Long Valley, US	daily rain	79.5 mm (3.1 in)	47.7 mm (1.9 in)	10 years	50 of 100 (Notable)
20 May 1999	Nambour Bowling Club, AU	daily rain	96.2 mm (3.8 in)	70.8 mm (2.8 in)	22 years	49 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

1802 to 1999

Records set or tied on this calendar date in each year from 1802 to 1999. 1999 had 673 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1999-05-20: 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 100	547
100 to 200	0
200 to 300	0
300 to 400	1
400 to 500	0
500 to 600	0
600 to 700	0
700 to 800	1