Weather Records on 21 July 2017

433 weather records were set or tied worldwide on 21 July 2017. Highest significance: Nevelsk, RU.

Key Facts for 21 July 2017

On 21 July 2017, 433 weather records were set or tied at long-record stations worldwide.
270 were record highs and 53 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 12 monthly and 419 daily.
Nevelsk set a daily record precipitation of 95.6 mm (3.8 in) on 21 July 2017.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 467 records.

Record Map

433 stations

433 station records on 21 July 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nevelsk	Russia	Record daily precipitation	95.6 mm (3.8 in)	67 of 100 (Major)
Bowdle	United States	Record daily precipitation	53.1 mm (2.1 in)	66 of 100 (Major)
Campina Grande	Brazil	Record daily precipitation	70.1 mm (2.8 in)	64 of 100 (Major)
Gilman	United States	Record daily precipitation	53.3 mm (2.1 in)	56 of 100 (Notable)
Desoto City 8 SW	United States	Record daily precipitation	67.3 mm (2.6 in)	52 of 100 (Notable)
Sitka AP	United States	Record high maximum temperature	30.0 C (86.0 F)	52 of 100 (Notable)
Ternej	Russia	Record daily precipitation	82.4 mm (3.2 in)	50 of 100 (Notable)
Toledo 3N	United States	Record daily precipitation	42.4 mm (1.7 in)	50 of 100 (Notable)
Webber Springs	United States	Record daily precipitation	27.9 mm (1.1 in)	50 of 100 (Notable)
Ola	United States	Record low minimum temperature	3.9 C (39.0 F)	46 of 100 (Notable)
Juzhno-Sahalinsk	Russia	Record daily precipitation	63.4 mm (2.5 in)	45 of 100 (Notable)
Rudnaja Pristan	Russia	Record daily precipitation	76.8 mm (3.0 in)	44 of 100 (Notable)
Wales	United States	Record daily precipitation	34.5 mm (1.4 in)	44 of 100 (Notable)
Yellow Jacket 2W	United States	Record daily precipitation	38.6 mm (1.5 in)	42 of 100 (Notable)
Pleasant Mt 1 W	United States	Record daily precipitation	56.6 mm (2.2 in)	41 of 100 (Notable)
Christchurch Intl	New Zealand	Record daily precipitation	40.9 mm (1.6 in)	40 of 100 (Notable)
Miami Intl AP	United States	Record daily precipitation	58.2 mm (2.3 in)	40 of 100 (Notable)
Shannon	Ireland	Record daily precipitation	48.0 mm (1.9 in)	39 of 100 (Notable)
Broadus	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Biskra	Algeria	Record high minimum temperature	34.0 C (93.2 F)	37 of 100 (Notable)
Rottweil	Germany	Record daily precipitation	47.1 mm (1.9 in)	37 of 100 (Notable)
Wolfach	Germany	Record daily precipitation	54.5 mm (2.1 in)	37 of 100 (Notable)
Hirado	Japan	Record high minimum temperature	27.1 C (80.8 F)	36 of 100 (Notable)
Mt Ayr	United States	Record high minimum temperature	24.4 C (75.9 F)	35 of 100 (Notable)
Ft Scott	United States	Record high minimum temperature	26.7 C (80.1 F)	35 of 100 (Notable)
Genoa 2 W	United States	Record high minimum temperature	25.0 C (77.0 F)	35 of 100 (Notable)
Loup City	United States	Record high minimum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Mombetsu	Japan	Record high maximum temperature	34.2 C (93.6 F)	33 of 100 (Routine)
Wungong Dam	Australia	Record daily precipitation	49.4 mm (1.9 in)	32 of 100 (Routine)
Holmsk	Russia	Record daily precipitation	55.9 mm (2.2 in)	32 of 100 (Routine)
Roscoe	United States	Record daily precipitation	29.7 mm (1.2 in)	32 of 100 (Routine)
Chuncheon	Korea, South	Record high minimum temperature	27.5 C (81.5 F)	31 of 100 (Routine)
Suphan Buri	Thailand	Record daily precipitation	42.7 mm (1.7 in)	31 of 100 (Routine)
Wessington 2SE	United States	Record daily precipitation	42.4 mm (1.7 in)	31 of 100 (Routine)
Brazzaville	Congo (Brazzaville)	Record high minimum temperature	22.7 C (72.9 F)	30 of 100 (Routine)
Njurba	Russia	Record low minimum temperature	1.6 C (34.9 F)	30 of 100 (Routine)
Marysville	United States	Record high minimum temperature	28.9 C (84.0 F)	30 of 100 (Routine)
Old Battle	United States	Record daily precipitation	35.6 mm (1.4 in)	30 of 100 (Routine)
Grand Forks Intl AP	United States	Record high minimum temperature	20.6 C (69.1 F)	30 of 100 (Routine)
Pleasant Valley	United States	Record daily precipitation	50.8 mm (2.0 in)	29 of 100 (Routine)
Rapid City 4NW	United States	Record low minimum temperature	8.9 C (48.0 F)	29 of 100 (Routine)
Jfk Intl AP	United States	Record high minimum temperature	26.1 C (79.0 F)	29 of 100 (Routine)
Puerto Limon	Costa Rica	Record low minimum temperature	19.3 C (66.7 F)	28 of 100 (Routine)
Abashiri	Japan	Record high maximum temperature	31.9 C (89.4 F)	28 of 100 (Routine)
Marre-Sale	Russia	Record high minimum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Ko Samui	Thailand	Record daily precipitation	45.2 mm (1.8 in)	28 of 100 (Routine)
Zearing	United States	Record daily precipitation	42.7 mm (1.7 in)	28 of 100 (Routine)
Mc Laughlin 2SW	United States	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Nantucket Mem AP	United States	Record high maximum temperature	29.4 C (84.9 F)	28 of 100 (Routine)
Save	Benin	Record high maximum temperature	33.9 C (93.0 F)	27 of 100 (Routine)
Bad-Calmbach Wildbad	Germany	Record daily precipitation	41.1 mm (1.6 in)	27 of 100 (Routine)
Hiroo	Japan	Record high maximum temperature	33.7 C (92.7 F)	27 of 100 (Routine)
Deputatskij	Russia	Record low minimum temperature	-3.6 C (25.5 F)	27 of 100 (Routine)
Portal 4 SW	United States	Record low maximum temperature	22.2 C (72.0 F)	27 of 100 (Routine)
Wynne	United States	Record high minimum temperature	26.1 C (79.0 F)	27 of 100 (Routine)
Zanesville Muni AP	United States	Record high minimum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
Huma	China	Record low minimum temperature	7.2 C (45.0 F)	26 of 100 (Routine)
Reit Im Winkl	Germany	Record daily precipitation	39.9 mm (1.6 in)	26 of 100 (Routine)
Bouake	Cote D'Ivoire	Record high minimum temperature	22.9 C (73.2 F)	26 of 100 (Routine)
Landvik	Norway	Record daily precipitation	27.2 mm (1.1 in)	26 of 100 (Routine)

Counts by Type and Timescale

433 records

Records set or tied on 21 July 2017 by type: Highest daily maximum 88, Lowest daily maximum 16, Highest daily minimum 182, Lowest daily minimum 37, Heaviest daily rainfall 110.

Records on 21 July 2017 by type
Record type	Records
Highest daily maximum	88
Lowest daily maximum	16
Highest daily minimum	182
Lowest daily minimum	37
Heaviest daily rainfall	110
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 2017 by timescale: all-time 2, monthly 12, daily 419.

How Much Records Were Beaten By

320 broken records

Margins by which the 320 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.9. Ties are not counted.

Top 20 by Significance

21 July 2017

Top 20 records on 21 July 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 2017	Nevelsk, RU	daily rain	95.6 mm (3.8 in)	70.9 mm (2.8 in)	68 years	67 of 100 (Major)
21 July 2017	Bowdle, US	daily rain	53.1 mm (2.1 in)	33.3 mm (1.3 in)	82 years	66 of 100 (Major)
21 July 2017	Campina Grande, BR	daily rain	70.1 mm (2.8 in)	23.6 mm (0.9 in)	98 years	64 of 100 (Major)
21 July 2017	Gilman, US	daily rain	53.3 mm (2.1 in)	26.1 mm (1.0 in)	104 years	56 of 100 (Notable)
21 July 2017	Desoto City 8 SW, US	daily rain	67.3 mm (2.6 in)	26.7 mm (1.1 in)	88 years	52 of 100 (Notable)
21 July 2017	Sitka AP, US	daily high max	30.0 C (86.0 F)	8.3 C (14.9 F)	44 years	52 of 100 (Notable)
21 July 2017	Ternej, RU	daily rain	82.4 mm (3.2 in)	56.2 mm (2.2 in)	26 years	50 of 100 (Notable)
21 July 2017	Toledo 3N, US	daily rain	42.4 mm (1.7 in)	19.5 mm (0.8 in)	90 years	50 of 100 (Notable)
21 July 2017	Webber Springs, US	daily rain	27.9 mm (1.1 in)	22.8 mm (0.9 in)	27 years	50 of 100 (Notable)
21 July 2017	Ola, US	daily low min	3.9 C (39.0 F)	2.2 C (4.0 F)	118 years	46 of 100 (Notable)
21 July 2017	Juzhno-Sahalinsk, RU	daily rain	63.4 mm (2.5 in)	33.4 mm (1.3 in)	28 years	45 of 100 (Notable)
21 July 2017	Rudnaja Pristan, RU	daily rain	76.8 mm (3.0 in)	23.9 mm (0.9 in)	67 years	44 of 100 (Notable)
21 July 2017	Wales, US	daily rain	34.5 mm (1.4 in)	16.5 mm (0.6 in)	67 years	44 of 100 (Notable)
21 July 2017	Yellow Jacket 2W, US	daily rain	38.6 mm (1.5 in)	18.8 mm (0.7 in)	32 years	42 of 100 (Notable)
21 July 2017	Pleasant Mt 1 W, US	daily rain	56.6 mm (2.2 in)	9.4 mm (0.37 in)	86 years	41 of 100 (Notable)
21 July 2017	Christchurch Intl, NZ	daily rain	40.9 mm (1.6 in)	16.0 mm (0.6 in)	52 years	40 of 100 (Notable)
21 July 2017	Miami Intl AP, US	daily rain	58.2 mm (2.3 in)	26.2 mm (1.0 in)	47 years	40 of 100 (Notable)
21 July 2017	Shannon, IE	monthly rain	48.0 mm (1.9 in)	6.9 mm (0.27 in)	38 years	39 of 100 (Notable)
21 July 2017	Broadus, US	daily high max	40.0 C (104.0 F)	0.6 C (1.1 F)	94 years	38 of 100 (Notable)
21 July 2017	Biskra, DZ	daily high min	34.0 C (93.2 F)	1.0 C (1.8 F)	80 years	37 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 2017

Records set or tied on this calendar date in each year from 1794 to 2017. 2017 had 433 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 2017-07-21: 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Margin	Records
0 to 10	286
10 to 20	19
20 to 30	11
30 to 40	2
40 to 50	0
50 to 60	1
60 to 70	0
70 to 80	1