Weather Records on 20 July 1999

815 weather records were set or tied worldwide on 20 July 1999. Highest significance: Hartington, US.

Key Facts for 20 July 1999

On 20 July 1999, 815 weather records were set or tied at long-record stations worldwide.
340 were record highs and 212 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 21 monthly and 787 daily.
Hartington set an all-time record daily precipitation of 141.7 mm (5.6 in) on 20 July 1999.
Across 161 earlier years (1809 to 2026) the same calendar date averaged 457 records.

Record Map

815 stations

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

Weather records on 20 July 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hartington	United States	Record daily precipitation	141.7 mm (5.6 in)	87 of 100 (Exceptional)
Osage	United States	Record daily precipitation	127.0 mm (5.0 in)	76 of 100 (Major)
Lansing	United States	Record daily precipitation	86.6 mm (3.4 in)	63 of 100 (Major)
Gullspang	Sweden	Record daily precipitation	74.5 mm (2.9 in)	57 of 100 (Notable)
Topolobampo (Smn)	Mexico	Record daily precipitation	104.9 mm (4.1 in)	53 of 100 (Notable)
Dalton	United States	Record daily precipitation	59.9 mm (2.4 in)	52 of 100 (Notable)
Rjukan	Norway	Record daily precipitation	47.5 mm (1.9 in)	50 of 100 (Notable)
Cliff 11 SE	United States	Record daily precipitation	45.5 mm (1.8 in)	50 of 100 (Notable)
Fairfield	United States	Record daily precipitation	83.8 mm (3.3 in)	49 of 100 (Notable)
Columbus	United States	Record daily precipitation	43.2 mm (1.7 in)	49 of 100 (Notable)
Presa Solis	Mexico	Record daily precipitation	51.3 mm (2.0 in)	48 of 100 (Notable)
Elephant Butte Dam	United States	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Skovorodino	Russia	Record daily precipitation	42.7 mm (1.7 in)	47 of 100 (Notable)
Oelwein 2 S	United States	Record daily precipitation	89.2 mm (3.5 in)	47 of 100 (Notable)
Zinapecuaro	Mexico	Record daily precipitation	46.0 mm (1.8 in)	45 of 100 (Notable)
Sviland	Norway	Record daily precipitation	39.0 mm (1.5 in)	45 of 100 (Notable)
Ulricehamn	Sweden	Record high minimum temperature	17.8 C (64.0 F)	45 of 100 (Notable)
Sorbytorp	Sweden	Record daily precipitation	30.0 mm (1.2 in)	45 of 100 (Notable)
Waukon 3NNE	United States	Record daily precipitation	92.5 mm (3.6 in)	45 of 100 (Notable)
Hawarden	United States	Record daily precipitation	83.8 mm (3.3 in)	44 of 100 (Notable)
De Smet	United States	Record daily precipitation	70.1 mm (2.8 in)	43 of 100 (Notable)
Pearsall	United States	Record low maximum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Hulett	United States	Record daily precipitation	31.8 mm (1.3 in)	43 of 100 (Notable)
Kentfield	United States	Record low maximum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Las Bayas	Mexico	Record daily precipitation	63.8 mm (2.5 in)	41 of 100 (Notable)
Poncitlan	Mexico	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Presa Taxhimay	Mexico	Record high minimum temperature	17.8 C (64.0 F)	41 of 100 (Notable)
Maksimovo	Russia	Record high minimum temperature	18.8 C (65.8 F)	41 of 100 (Notable)
Macomb	United States	Record daily precipitation	46.7 mm (1.8 in)	41 of 100 (Notable)
Armour	United States	Record daily precipitation	51.3 mm (2.0 in)	41 of 100 (Notable)
Port Davey (Melaleuca)	Australia	Record daily precipitation	43.6 mm (1.7 in)	40 of 100 (Notable)
Terry	United States	Record daily precipitation	51.3 mm (2.0 in)	40 of 100 (Notable)
Alexandria	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
N Bend SW Oregon Rgnl AP	United States	Record low maximum temperature	15.6 C (60.1 F)	39 of 100 (Notable)
Kirchdorf/Poel	Germany	Record high minimum temperature	18.0 C (64.4 F)	38 of 100 (Notable)
Kramfors	Sweden	Record daily precipitation	34.5 mm (1.4 in)	38 of 100 (Notable)
Everett	United States	Record high minimum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Bricelyn	United States	Record daily precipitation	76.2 mm (3.0 in)	37 of 100 (Notable)
Otis	United States	Record high minimum temperature	22.8 C (73.0 F)	37 of 100 (Notable)
Homutovo	Russia	Record high minimum temperature	20.8 C (69.4 F)	36 of 100 (Notable)
Presa la Concepcion	Mexico	Record daily precipitation	36.8 mm (1.4 in)	35 of 100 (Notable)
Bakke	Norway	Record daily precipitation	38.1 mm (1.5 in)	35 of 100 (Notable)
Flekkefjord	Norway	Record daily precipitation	43.5 mm (1.7 in)	35 of 100 (Notable)
Eikanger - Myr	Norway	Record daily precipitation	37.2 mm (1.5 in)	35 of 100 (Notable)
Kon-Kolodez	Russia	Record daily precipitation	72.2 mm (2.8 in)	35 of 100 (Notable)
Ft Morgan	United States	Record daily precipitation	28.7 mm (1.1 in)	35 of 100 (Notable)
Centro Experimental W-75	Mexico	Record high maximum temperature	42.8 C (109.0 F)	34 of 100 (Routine)
Sand I Ryfylke II	Norway	Record daily precipitation	55.0 mm (2.2 in)	34 of 100 (Routine)
Silverton	United States	Record low maximum temperature	15.6 C (60.1 F)	34 of 100 (Routine)
Hugo	United States	Record low maximum temperature	28.9 C (84.0 F)	34 of 100 (Routine)
Elma	United States	Record high minimum temperature	17.2 C (63.0 F)	34 of 100 (Routine)
Santiago	Mexico	Record high maximum temperature	36.7 C (98.1 F)	33 of 100 (Routine)
Jalacingo	Mexico	Record high minimum temperature	18.3 C (64.9 F)	33 of 100 (Routine)
Fana - Stend	Norway	Record daily precipitation	64.5 mm (2.5 in)	33 of 100 (Routine)
Ouray	United States	Record low maximum temperature	16.7 C (62.1 F)	33 of 100 (Routine)
Oakland	United States	Record daily precipitation	52.6 mm (2.1 in)	33 of 100 (Routine)
Hagerstown 1E	United States	Record high minimum temperature	23.9 C (75.0 F)	33 of 100 (Routine)
Somerville 4 NW	United States	Record high maximum temperature	37.8 C (100.0 F)	33 of 100 (Routine)
Bikaner	India	Record daily precipitation	65.0 mm (2.6 in)	32 of 100 (Routine)
Los Capulines	Mexico	Record daily precipitation	77.0 mm (3.0 in)	32 of 100 (Routine)

Counts by Type and Timescale

815 records

Records set or tied on 20 July 1999 by type: Highest daily maximum 109, Lowest daily maximum 119, Highest daily minimum 231, Lowest daily minimum 93, Heaviest daily rainfall 263.

Records on 20 July 1999 by type
Record type	Records
Highest daily maximum	109
Lowest daily maximum	119
Highest daily minimum	231
Lowest daily minimum	93
Heaviest daily rainfall	263
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 July 1999 by timescale: all-time 7, monthly 21, daily 787.

How Much Records Were Beaten By

614 broken records

Margins by which the 614 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 92.5. Ties are not counted.

Top 20 by Significance

20 July 1999

Top 20 records on 20 July 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 July 1999	Hartington, US	all-time rain	141.7 mm (5.6 in)	37.6 mm (1.5 in)	97 years	87 of 100 (Exceptional)
20 July 1999	Osage, US	daily rain	127.0 mm (5.0 in)	65.0 mm (2.6 in)	86 years	76 of 100 (Major)
20 July 1999	Lansing, US	daily rain	86.6 mm (3.4 in)	35.8 mm (1.4 in)	96 years	63 of 100 (Major)
20 July 1999	Gullspang, SE	all-time rain	74.5 mm (2.9 in)	17.8 mm (0.7 in)	29 years	57 of 100 (Notable)
20 July 1999	Topolobampo (Smn), MX	daily rain	104.9 mm (4.1 in)	92.5 mm (3.6 in)	33 years	53 of 100 (Notable)
20 July 1999	Dalton, US	daily rain	59.9 mm (2.4 in)	24.1 mm (0.9 in)	70 years	52 of 100 (Notable)
20 July 1999	Rjukan, NO	daily rain	47.5 mm (1.9 in)	13.5 mm (0.5 in)	80 years	50 of 100 (Notable)
20 July 1999	Cliff 11 SE, US	daily rain	45.5 mm (1.8 in)	25.2 mm (1.0 in)	44 years	50 of 100 (Notable)
20 July 1999	Fairfield, US	monthly rain	83.8 mm (3.3 in)	28.2 mm (1.1 in)	2 years	49 of 100 (Notable)
20 July 1999	Columbus, US	daily rain	43.2 mm (1.7 in)	17.8 mm (0.7 in)	93 years	49 of 100 (Notable)
20 July 1999	Presa Solis, MX	daily rain	51.3 mm (2.0 in)	31.0 mm (1.2 in)	34 years	48 of 100 (Notable)
20 July 1999	Elephant Butte Dam, US	daily rain	33.0 mm (1.3 in)	10.4 mm (0.4 in)	84 years	48 of 100 (Notable)
20 July 1999	Skovorodino, RU	daily rain	42.7 mm (1.7 in)	15.4 mm (0.6 in)	81 years	47 of 100 (Notable)
20 July 1999	Oelwein 2 S, US	daily rain	89.2 mm (3.5 in)	42.2 mm (1.7 in)	36 years	47 of 100 (Notable)
20 July 1999	Zinapecuaro, MX	daily rain	46.0 mm (1.8 in)	21.1 mm (0.8 in)	49 years	45 of 100 (Notable)
20 July 1999	Sviland, NO	daily rain	39.0 mm (1.5 in)	7.9 mm (0.31 in)	92 years	45 of 100 (Notable)
20 July 1999	Ulricehamn, SE	daily high min	17.8 C (64.0 F)	1.3 C (2.3 F)	103 years	45 of 100 (Notable)
20 July 1999	Sorbytorp, SE	daily rain	30.0 mm (1.2 in)	20.5 mm (0.8 in)	40 years	45 of 100 (Notable)
20 July 1999	Waukon 3NNE, US	daily rain	92.5 mm (3.6 in)	56.2 mm (2.2 in)	8 years	45 of 100 (Notable)
20 July 1999	Hawarden, US	daily rain	83.8 mm (3.3 in)	38.1 mm (1.5 in)	26 years	44 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

1809 to 1999

Records set or tied on this calendar date in each year from 1809 to 1999. 1999 had 815 records.

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

Records on 07-20 in each year
Year	Records
1809	1
1810	1
1811	2
1832	2
1844	2
1850	1
1859	2
1863	1
1865	4
1866	1
1867	1
1868	1
1870	1
1872	1
1874	2
1876	1
1877	2
1879	3
1880	1
1881	2
1882	1
1883	2
1885	1
1886	2
1887	1
1888	1
1889	2
1890	5
1892	7
1893	1
1894	1
1895	1
1897	4
1898	2
1899	4
1900	9
1901	3
1902	13
1903	6
1904	10
1905	6
1906	8
1907	12
1908	31
1909	6
1910	27
1911	12
1912	33
1913	28
1914	20
1915	163
1916	117
1917	57
1918	53
1919	40
1920	16
1921	55
1922	52
1923	173
1924	112
1925	125
1926	411
1927	106
1928	366
1929	480
1930	598
1931	362
1932	338
1933	201
1934	857
1935	386
1936	358
1937	213
1938	392
1939	336
1940	325
1941	270
1942	609
1943	326
1944	470
1945	278
1946	482
1947	635
1948	385
1949	807
1950	563
1951	448
1952	488
1953	316
1954	512
1955	377
1956	545
1957	351
1958	536
1959	605
1960	758
1961	338
1962	327
1963	457
1964	416
1965	1,110
1966	469
1967	455
1968	389
1969	649
1970	890
1971	619
1972	1,062
1973	804
1974	489
1975	470
1976	580
1977	899
1978	663
1979	1,249
1980	925
1981	1,048
1982	580
1983	1,117
1984	799
1985	604
1986	848
1987	1,156
1988	1,103
1989	1,183
1990	724
1991	1,024
1992	1,137
1993	901
1994	611
1995	961
1996	1,365
1997	903
1998	1,682
1999	815
2000	1,393
2001	755
2002	986
2003	1,313
2004	978
2005	1,266
2006	1,487
2007	1,124
2008	663
2009	1,533
2010	1,154
2011	1,339
2012	817
2013	850
2014	1,000
2015	812
2016	744
2017	398
2018	930
2019	867
2020	524
2021	683
2022	1,108
2023	812
2024	737
2025	680
2026	863

Download the Data

Data for records on 1999-07-20: 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 20	580
20 to 40	29
40 to 60	3
60 to 80	1
80 to 100	1