Weather Records on 21 July 1971

475 weather records were set or tied worldwide on 21 July 1971. Highest significance: Fortaleza, BR.

Key Facts for 21 July 1971

On 21 July 1971, 475 weather records were set or tied at long-record stations worldwide.
108 were record highs and 259 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 10 monthly and 462 daily.
Fortaleza set a monthly record daily precipitation of 138.5 mm (5.5 in) on 21 July 1971.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 467 records.

Record Map

475 stations

475 station records on 21 July 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Fortaleza	Brazil	Record daily precipitation	138.5 mm (5.5 in)	62 of 100 (Major)
Caucaia	Brazil	Record daily precipitation	145.6 mm (5.7 in)	56 of 100 (Notable)
Maranguape	Brazil	Record daily precipitation	88.4 mm (3.5 in)	56 of 100 (Notable)
Boca	United States	Record daily precipitation	29.2 mm (1.1 in)	51 of 100 (Notable)
Ascencion (Smn)	Mexico	Record daily precipitation	42.9 mm (1.7 in)	50 of 100 (Notable)
Sar'ja	Russia	Record daily precipitation	80.4 mm (3.2 in)	48 of 100 (Notable)
W Pt	United States	Record daily precipitation	101.6 mm (4.0 in)	48 of 100 (Notable)
Pierce 1 E	United States	Record low minimum temperature	17.2 C (63.0 F)	44 of 100 (Notable)
Burns WSO City	United States	Record daily precipitation	25.4 mm (1.0 in)	44 of 100 (Notable)
Arzamas	Russia	Record daily precipitation	45.5 mm (1.8 in)	43 of 100 (Notable)
Tahlequah	United States	Record low minimum temperature	9.4 C (48.9 F)	42 of 100 (Notable)
Bathurst	Canada	Record low minimum temperature	5.0 C (41.0 F)	41 of 100 (Notable)
Carville 2 SW	United States	Record daily precipitation	88.9 mm (3.5 in)	41 of 100 (Notable)
Chiricahua Nm	United States	Record high minimum temperature	22.2 C (72.0 F)	39 of 100 (Notable)
Brjansk	Russia	Record daily precipitation	29.7 mm (1.2 in)	37 of 100 (Notable)
Poset	Russia	Record daily precipitation	52.7 mm (2.1 in)	37 of 100 (Notable)
Monticello	United States	Record daily precipitation	45.2 mm (1.8 in)	37 of 100 (Notable)
Kirensk	Russia	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Columbia	United States	Record daily precipitation	82.8 mm (3.3 in)	36 of 100 (Notable)
Columbus 4 ESE	United States	Record low maximum temperature	27.2 C (81.0 F)	36 of 100 (Notable)
Monticello Muni AP	United States	Record low minimum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Valdaj	Russia	Record daily precipitation	29.2 mm (1.1 in)	35 of 100 (Notable)
Angleton 2 W	United States	Record daily precipitation	68.6 mm (2.7 in)	35 of 100 (Notable)
Husum	Germany	Record low minimum temperature	5.8 C (42.4 F)	34 of 100 (Routine)
Poretskoye	Russia	Record high maximum temperature	33.5 C (92.3 F)	33 of 100 (Routine)
Ekaterinburg	Russia	Record high minimum temperature	19.0 C (66.2 F)	33 of 100 (Routine)
Junsele	Sweden	Record low minimum temperature	1.4 C (34.5 F)	33 of 100 (Routine)
Donaldsonville 4 SW	United States	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)
Clovis	United States	Record low minimum temperature	11.7 C (53.1 F)	33 of 100 (Routine)
Crosbyton	United States	Record low maximum temperature	20.6 C (69.1 F)	33 of 100 (Routine)
Snyder	United States	Record low maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)
Kenai AP	United States	Record low minimum temperature	1.7 C (35.1 F)	33 of 100 (Routine)
Florence	United States	Record low minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Tombstone	United States	Record high minimum temperature	21.7 C (71.1 F)	32 of 100 (Routine)
Avon Park 2 W	United States	Record low minimum temperature	20.0 C (68.0 F)	32 of 100 (Routine)
Tallulah	United States	Record low minimum temperature	16.1 C (61.0 F)	32 of 100 (Routine)
Shiprock	United States	Record daily precipitation	33.3 mm (1.3 in)	32 of 100 (Routine)
Buzau	Romania	Record low maximum temperature	19.4 C (66.9 F)	31 of 100 (Routine)
Paonia 1SW	United States	Record daily precipitation	25.4 mm (1.0 in)	31 of 100 (Routine)
Sugartown	United States	Record daily precipitation	45.5 mm (1.8 in)	31 of 100 (Routine)
Rosedale	United States	Record low minimum temperature	16.1 C (61.0 F)	31 of 100 (Routine)
Webbers Falls 5 WSW	United States	Record low minimum temperature	13.9 C (57.0 F)	31 of 100 (Routine)
Coldwater	United States	Record low minimum temperature	11.1 C (52.0 F)	31 of 100 (Routine)
Monroe Rgnl AP	United States	Record low minimum temperature	16.7 C (62.1 F)	31 of 100 (Routine)
Helena	United States	Record low maximum temperature	27.8 C (82.0 F)	30 of 100 (Routine)
Saint Maries	United States	Record high minimum temperature	17.8 C (64.0 F)	30 of 100 (Routine)
Tylertown 5ESE	United States	Record daily precipitation	45.2 mm (1.8 in)	30 of 100 (Routine)
Little Mtn	United States	Record daily precipitation	52.1 mm (2.1 in)	30 of 100 (Routine)
Haskell	United States	Record low maximum temperature	25.0 C (77.0 F)	30 of 100 (Routine)
Praha-Klementinum	Czech Republic	Record low minimum temperature	9.7 C (49.5 F)	29 of 100 (Routine)
Conway	United States	Record low minimum temperature	13.9 C (57.0 F)	29 of 100 (Routine)
Warren 2 ENE	United States	Record low minimum temperature	15.6 C (60.1 F)	28 of 100 (Routine)
Rockville 1 NE	United States	Record low minimum temperature	9.4 C (48.9 F)	28 of 100 (Routine)
Franklinville	United States	Record low maximum temperature	20.6 C (69.1 F)	28 of 100 (Routine)
Saint Paul Is AP	United States	Record low maximum temperature	5.6 C (42.1 F)	28 of 100 (Routine)
Wrixum/Fohr	Germany	Record low minimum temperature	7.2 C (45.0 F)	27 of 100 (Routine)
Animas 3ESE	United States	Record high minimum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Healdton 3 E	United States	Record low minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
Pauls Valley 4 WSW	United States	Record low minimum temperature	14.4 C (57.9 F)	27 of 100 (Routine)
McAlester Rgnl AP	United States	Record low minimum temperature	15.0 C (59.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

475 records

Records set or tied on 21 July 1971 by type: Highest daily maximum 37, Lowest daily maximum 85, Highest daily minimum 71, Lowest daily minimum 174, Heaviest daily rainfall 107, Deepest snow cover 1.

Records on 21 July 1971 by type
Record type	Records
Highest daily maximum	37
Lowest daily maximum	85
Highest daily minimum	71
Lowest daily minimum	174
Heaviest daily rainfall	107
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 21 July 1971 by timescale: all-time 3, monthly 10, daily 462.

How Much Records Were Beaten By

357 broken records

Margins by which the 357 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 254.0. Ties are not counted.

Top 20 by Significance

21 July 1971

Top 20 records on 21 July 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1971	Fortaleza, BR	monthly rain	138.5 mm (5.5 in)	62.2 mm (2.4 in)	24 years	62 of 100 (Major)
21 July 1971	Caucaia, BR	monthly rain	145.6 mm (5.7 in)	60.2 mm (2.4 in)	0 years	56 of 100 (Notable)
21 July 1971	Maranguape, BR	monthly rain	88.4 mm (3.5 in)	31.6 mm (1.2 in)	0 years	56 of 100 (Notable)
21 July 1971	Boca, US	daily rain	29.2 mm (1.1 in)	28.4 mm (1.1 in)	28 years	51 of 100 (Notable)
21 July 1971	Ascencion (Smn), MX	daily rain	42.9 mm (1.7 in)	33.0 mm (1.3 in)	21 years	50 of 100 (Notable)
21 July 1971	Sar'ja, RU	all-time rain	80.4 mm (3.2 in)	17.1 mm (0.7 in)	19 years	48 of 100 (Notable)
21 July 1971	W Pt, US	daily rain	101.6 mm (4.0 in)	72.4 mm (2.9 in)	0 years	48 of 100 (Notable)
21 July 1971	Pierce 1 E, US	daily low min	17.2 C (63.0 F)	2.8 C (5.0 F)	60 years	44 of 100 (Notable)
21 July 1971	Burns WSO City, US	daily rain	25.4 mm (1.0 in)	19.0 mm (0.7 in)	5 years	44 of 100 (Notable)
21 July 1971	Arzamas, RU	daily rain	45.5 mm (1.8 in)	38.5 mm (1.5 in)	1 year	43 of 100 (Notable)
21 July 1971	Tahlequah, US	daily low min	9.4 C (48.9 F)	6.2 C (11.2 F)	41 years	42 of 100 (Notable)
21 July 1971	Bathurst, CA	daily low min	5.0 C (41.0 F)	2.8 C (5.0 F)	79 years	41 of 100 (Notable)
21 July 1971	Carville 2 SW, US	daily rain	88.9 mm (3.5 in)	45.0 mm (1.8 in)	24 years	41 of 100 (Notable)
21 July 1971	Chiricahua Nm, US	daily high min	22.2 C (72.0 F)	3.3 C (5.9 F)	60 years	39 of 100 (Notable)
21 July 1971	Brjansk, RU	daily rain	29.7 mm (1.2 in)	24.3 mm (1.0 in)	2 years	37 of 100 (Notable)
21 July 1971	Poset, RU	daily rain	52.7 mm (2.1 in)	35.1 mm (1.4 in)	8 years	37 of 100 (Notable)
21 July 1971	Monticello, US	daily rain	45.2 mm (1.8 in)	18.0 mm (0.7 in)	54 years	37 of 100 (Notable)
21 July 1971	Kirensk, RU	daily rain	26.2 mm (1.0 in)	6.6 mm (0.26 in)	69 years	36 of 100 (Notable)
21 July 1971	Columbia, US	daily rain	82.8 mm (3.3 in)	34.5 mm (1.4 in)	17 years	36 of 100 (Notable)
21 July 1971	Columbus 4 ESE, US	daily low max	27.2 C (81.0 F)	1.7 C (3.1 F)	76 years	36 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 1971

Records set or tied on this calendar date in each year from 1794 to 1971. 1971 had 475 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 1971-07-21: 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 50	353
50 to 100	3
100 to 150	0
150 to 200	0
200 to 250	0
250 to 300	1