Weather Records on 21 July 1997

849 weather records were set or tied worldwide on 21 July 1997. Highest significance: Billings Wtp, US.

Key Facts for 21 July 1997

On 21 July 1997, 849 weather records were set or tied at long-record stations worldwide.
414 were record highs and 216 were record lows, counting maximum and minimum temperature.
By timescale, 7 were all-time records, 29 monthly and 813 daily.
Billings Wtp set a daily record precipitation of 42.2 mm (1.7 in) on 21 July 1997.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 464 records.

Record Map

849 stations

849 station records on 21 July 1997 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 1997: highest significance records shown on the map
Station	Country	Type	Value	Significance
Billings Wtp	United States	Record daily precipitation	42.2 mm (1.7 in)	76 of 100 (Major)
Tompa	Russia	Record daily precipitation	78.0 mm (3.1 in)	51 of 100 (Notable)
San Antonio Las Alazanas (Dge	Mexico	Record daily precipitation	39.9 mm (1.6 in)	50 of 100 (Notable)
Huntley Exp STN	United States	Record daily precipitation	44.7 mm (1.8 in)	49 of 100 (Notable)
Innisfail	Australia	Record daily precipitation	52.0 mm (2.0 in)	48 of 100 (Notable)
Bay Springs	United States	Record low minimum temperature	15.6 C (60.1 F)	46 of 100 (Notable)
Caon Fernandez	Mexico	Record daily precipitation	86.4 mm (3.4 in)	45 of 100 (Notable)
Ciudad Santos	Mexico	Record low minimum temperature	12.8 C (55.0 F)	45 of 100 (Notable)
Rio Piedras Exp STN	Puerto Rico [United States]	Record daily precipitation	54.6 mm (2.1 in)	44 of 100 (Notable)
Magdagaci	Russia	Record daily precipitation	46.0 mm (1.8 in)	44 of 100 (Notable)
Brookwood	United States	Record daily precipitation	124.5 mm (4.9 in)	44 of 100 (Notable)
Siwa	Egypt	Record high maximum temperature	45.0 C (113.0 F)	43 of 100 (Notable)
Los Pilares	Mexico	Record daily precipitation	73.9 mm (2.9 in)	42 of 100 (Notable)
Taksimo	Russia	Record daily precipitation	40.8 mm (1.6 in)	41 of 100 (Notable)
Tucson Camp Ave Exp	United States	Record low maximum temperature	30.6 C (87.1 F)	41 of 100 (Notable)
Angola	United States	Record daily precipitation	70.1 mm (2.8 in)	40 of 100 (Notable)
Tranebjerg	Denmark	Record high minimum temperature	19.4 C (66.9 F)	39 of 100 (Notable)
San Luis Potosi (Dge)	Mexico	Record daily precipitation	28.4 mm (1.1 in)	39 of 100 (Notable)
Amsterdam	Netherlands	Record daily precipitation	33.2 mm (1.3 in)	39 of 100 (Notable)
Atakpane	Togo	Record daily precipitation	55.1 mm (2.2 in)	39 of 100 (Notable)
Fairhope 2 NE	United States	Record low maximum temperature	25.0 C (77.0 F)	39 of 100 (Notable)
Siloam Springs 1E	United States	Record daily precipitation	53.3 mm (2.1 in)	39 of 100 (Notable)
San Antonio Las Alazanas (Smn	Mexico	Record daily precipitation	39.9 mm (1.6 in)	38 of 100 (Notable)
Mapimi	Mexico	Record daily precipitation	56.4 mm (2.2 in)	38 of 100 (Notable)
Gyshgy	Turkmenistan	Record high minimum temperature	27.0 C (80.6 F)	38 of 100 (Notable)
Lacon	United States	Record daily precipitation	99.3 mm (3.9 in)	38 of 100 (Notable)
Jewell	United States	Record daily precipitation	56.6 mm (2.2 in)	38 of 100 (Notable)
Ebeleben	Germany	Record daily precipitation	31.6 mm (1.2 in)	37 of 100 (Notable)
Ayutla	Mexico	Record low minimum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Gouda	Netherlands	Record daily precipitation	29.5 mm (1.2 in)	37 of 100 (Notable)
Kinston 7 SE	United States	Record daily precipitation	52.6 mm (2.1 in)	37 of 100 (Notable)
Tegjultja	Russia	Record high minimum temperature	22.9 C (73.2 F)	36 of 100 (Notable)
Kellerberrin	Australia	Record low minimum temperature	-3.2 C (26.2 F)	35 of 100 (Notable)
Katanning Comparison	Australia	Record low minimum temperature	-1.4 C (29.5 F)	35 of 100 (Notable)
Hotan	China	Record high minimum temperature	25.6 C (78.1 F)	35 of 100 (Notable)
Nijkerk	Netherlands	Record daily precipitation	25.4 mm (1.0 in)	35 of 100 (Notable)
Wickenburg	United States	Record high minimum temperature	27.2 C (81.0 F)	35 of 100 (Notable)
Vallecitos	Mexico	Record low minimum temperature	10.6 C (51.1 F)	34 of 100 (Routine)
El Peaje	Mexico	Record daily precipitation	44.5 mm (1.8 in)	34 of 100 (Routine)
Paraiso	Puerto Rico [United States]	Record daily precipitation	45.7 mm (1.8 in)	34 of 100 (Routine)
Lumberton	United States	Record daily precipitation	82.0 mm (3.2 in)	34 of 100 (Routine)
Ft Duchesne	United States	Record low minimum temperature	2.8 C (37.0 F)	34 of 100 (Routine)
Schellingwoude	Netherlands	Record daily precipitation	27.4 mm (1.1 in)	33 of 100 (Routine)
Novosibirsk	Russia	Record low minimum temperature	6.0 C (42.8 F)	33 of 100 (Routine)
Greensboro	United States	Record daily precipitation	47.8 mm (1.9 in)	33 of 100 (Routine)
San Rafael-Civic Ctr	United States	Record low minimum temperature	7.2 C (45.0 F)	33 of 100 (Routine)
Nordhorn	Germany	Record daily precipitation	60.2 mm (2.4 in)	32 of 100 (Routine)
Imuris (Smn)	Mexico	Record low maximum temperature	25.6 C (78.1 F)	32 of 100 (Routine)
Charleston	United States	Record daily precipitation	41.7 mm (1.6 in)	32 of 100 (Routine)
Brewton 3 SSE	United States	Record low maximum temperature	24.4 C (75.9 F)	31 of 100 (Routine)
Hobbs	United States	Record high minimum temperature	25.6 C (78.1 F)	31 of 100 (Routine)
Hemlock	United States	Record low maximum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Buffalo Bill Dam	United States	Record low minimum temperature	3.9 C (39.0 F)	31 of 100 (Routine)
Mersa Matruh	Egypt	Record high minimum temperature	24.6 C (76.3 F)	30 of 100 (Routine)
Bahia de Los Angeles	Mexico	Record high maximum temperature	45.0 C (113.0 F)	30 of 100 (Routine)
Hengelo (O)	Netherlands	Record daily precipitation	37.2 mm (1.5 in)	30 of 100 (Routine)
Newport	United States	Record high minimum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Madera	Mexico	Record daily precipitation	63.0 mm (2.5 in)	29 of 100 (Routine)
Atenguillo	Mexico	Record low minimum temperature	5.6 C (42.1 F)	29 of 100 (Routine)
Quitupan	Mexico	Record low minimum temperature	10.6 C (51.1 F)	29 of 100 (Routine)

Counts by Type and Timescale

849 records

Records set or tied on 21 July 1997 by type: Highest daily maximum 216, Lowest daily maximum 84, Highest daily minimum 198, Lowest daily minimum 132, Heaviest daily rainfall 219.

Records on 21 July 1997 by type
Record type	Records
Highest daily maximum	216
Lowest daily maximum	84
Highest daily minimum	198
Lowest daily minimum	132
Heaviest daily rainfall	219
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 1997 by timescale: all-time 7, monthly 29, daily 813.

How Much Records Were Beaten By

632 broken records

Margins by which the 632 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 46.2. Ties are not counted.

Top 20 by Significance

21 July 1997

Top 20 records on 21 July 1997 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1997	Billings Wtp, US	daily rain	42.2 mm (1.7 in)	24.9 mm (1.0 in)	88 years	76 of 100 (Major)
21 July 1997	Tompa, RU	all-time rain	78.0 mm (3.1 in)	19.0 mm (0.7 in)	12 years	51 of 100 (Notable)
21 July 1997	San Antonio Las Alazanas (Dge, MX	daily rain	39.9 mm (1.6 in)	25.9 mm (1.0 in)	40 years	50 of 100 (Notable)
21 July 1997	Huntley Exp STN, US	daily rain	44.7 mm (1.8 in)	36.6 mm (1.4 in)	4 years	49 of 100 (Notable)
21 July 1997	Innisfail, AU	daily rain	52.0 mm (2.0 in)	16.9 mm (0.7 in)	88 years	48 of 100 (Notable)
21 July 1997	Bay Springs, US	daily low min	15.6 C (60.1 F)	2.2 C (4.0 F)	83 years	46 of 100 (Notable)
21 July 1997	Caon Fernandez, MX	all-time rain	86.4 mm (3.4 in)	17.6 mm (0.7 in)	3 years	45 of 100 (Notable)
21 July 1997	Ciudad Santos, MX	daily low min	12.8 C (55.0 F)	6.1 C (11.0 F)	23 years	45 of 100 (Notable)
21 July 1997	Rio Piedras Exp STN, PR	daily rain	54.6 mm (2.1 in)	38.9 mm (1.5 in)	15 years	44 of 100 (Notable)
21 July 1997	Magdagaci, RU	daily rain	46.0 mm (1.8 in)	20.5 mm (0.8 in)	60 years	44 of 100 (Notable)
21 July 1997	Brookwood, US	monthly rain	124.5 mm (4.9 in)	44.5 mm (1.8 in)	0 years	44 of 100 (Notable)
21 July 1997	Siwa, EG	daily high max	45.0 C (113.0 F)	3.0 C (5.4 F)	76 years	43 of 100 (Notable)
21 July 1997	Los Pilares, MX	monthly rain	73.9 mm (2.9 in)	24.6 mm (1.0 in)	0 years	42 of 100 (Notable)
21 July 1997	Taksimo, RU	daily rain	40.8 mm (1.6 in)	27.6 mm (1.1 in)	24 years	41 of 100 (Notable)
21 July 1997	Tucson Camp Ave Exp, US	daily low max	30.6 C (87.1 F)	0.5 C (0.9 F)	103 years	41 of 100 (Notable)
21 July 1997	Angola, US	daily rain	70.1 mm (2.8 in)	43.7 mm (1.7 in)	3 years	40 of 100 (Notable)
21 July 1997	Tranebjerg, DK	daily high min	19.4 C (66.9 F)	1.2 C (2.2 F)	83 years	39 of 100 (Notable)
21 July 1997	San Luis Potosi (Dge), MX	daily rain	28.4 mm (1.1 in)	23.3 mm (0.9 in)	39 years	39 of 100 (Notable)
21 July 1997	Amsterdam, NL	daily rain	33.2 mm (1.3 in)	12.6 mm (0.5 in)	47 years	39 of 100 (Notable)
21 July 1997	Atakpane, TG	daily rain	55.1 mm (2.2 in)	34.1 mm (1.3 in)	44 years	39 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

1794 to 1997

Records set or tied on this calendar date in each year from 1794 to 1997. 1997 had 849 records.

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

Records on 07-21 in each year
Year	Records
1794	1
1795	1
1796	1
1797	1
1813	2
1832	2
1837	1
1839	1
1843	1
1844	2
1854	1
1859	3
1865	3
1868	3
1872	1
1876	1
1879	2
1880	1
1881	1
1884	1
1885	1
1886	2
1888	2
1889	3
1890	2
1892	3
1893	3
1894	3
1895	1
1896	3
1897	4
1898	7
1899	2
1900	6
1901	13
1902	12
1903	10
1904	8
1905	13
1906	13
1907	12
1908	25
1909	18
1910	12
1911	37
1912	52
1913	41
1914	48
1915	81
1916	72
1917	136
1918	130
1919	51
1920	33
1921	55
1922	48
1923	132
1924	286
1925	202
1926	401
1927	191
1928	205
1929	360
1930	521
1931	549
1932	322
1933	208
1934	965
1935	236
1936	322
1937	253
1938	638
1939	415
1940	318
1941	226
1942	318
1943	253
1944	716
1945	300
1946	398
1947	795
1948	403
1949	603
1950	662
1951	427
1952	657
1953	351
1954	656
1955	582
1956	490
1957	447
1958	531
1959	940
1960	651
1961	388
1962	263
1963	470
1964	457
1965	748
1966	626
1967	313
1968	334
1969	636
1970	1,241
1971	475
1972	1,046
1973	871
1974	536
1975	380
1976	477
1977	708
1978	1,155
1979	964
1980	926
1981	1,352
1982	588
1983	1,234
1984	764
1985	554
1986	791
1987	1,025
1988	1,015
1989	973
1990	914
1991	812
1992	1,562
1993	866
1994	773
1995	1,247
1996	1,141
1997	849
1998	1,674
1999	814
2000	1,230
2001	889
2002	990
2003	1,250
2004	694
2005	1,420
2006	1,479
2007	1,145
2008	989
2009	1,306
2010	1,148
2011	1,414
2012	815
2013	526
2014	762
2015	704
2016	645
2017	433
2018	942
2019	755
2020	363
2021	574
2022	866
2023	816
2024	873
2025	881
2026	874

Download the Data

Data for records on 1997-07-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Histogram of margins by which records were beaten on 21 July 1997
Margin	Records
0 to 10	566
10 to 20	40
20 to 30	16
30 to 40	7
40 to 50	3