Weather Records on 21 July 1930

521 weather records were set or tied worldwide on 21 July 1930. Highest significance: Lake Moraine, US.

Key Facts for 21 July 1930

On 21 July 1930, 521 weather records were set or tied at long-record stations worldwide.
421 were record highs and 32 were record lows, counting maximum and minimum temperature.
By timescale, 32 were all-time records, 33 monthly and 456 daily.
Lake Moraine set a daily record precipitation of 44.5 mm (1.8 in) on 21 July 1930.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 466 records.

Record Map

521 stations

521 station records on 21 July 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lake Moraine	United States	Record daily precipitation	44.5 mm (1.8 in)	45 of 100 (Notable)
Durango	United States	Record daily precipitation	58.4 mm (2.3 in)	44 of 100 (Notable)
Stanton	United States	Record daily precipitation	61.7 mm (2.4 in)	44 of 100 (Notable)
Olekminsk	Russia	Record daily precipitation	28.2 mm (1.1 in)	38 of 100 (Notable)
Vickery 2 NW	United States	Record high minimum temperature	27.8 C (82.0 F)	38 of 100 (Notable)
Trenton 2	United States	Record high maximum temperature	38.3 C (100.9 F)	37 of 100 (Notable)
Bowling Green Wwtp	United States	Record high minimum temperature	26.1 C (79.0 F)	34 of 100 (Routine)
Martinsburg E W Virginia Rgnl	United States	Record high minimum temperature	30.0 C (86.0 F)	34 of 100 (Routine)
Viljujsk	Russia	Record daily precipitation	49.0 mm (1.9 in)	33 of 100 (Routine)
Mc Cook	United States	Record daily precipitation	53.3 mm (2.1 in)	33 of 100 (Routine)
Norwalk Wwtp	United States	Record high minimum temperature	26.1 C (79.0 F)	33 of 100 (Routine)
Norwalk	United States	Record high maximum temperature	38.3 C (100.9 F)	32 of 100 (Routine)
Millsboro	United States	Record high maximum temperature	43.3 C (109.9 F)	32 of 100 (Routine)
Greensburg	United States	Record high maximum temperature	39.4 C (102.9 F)	32 of 100 (Routine)
Phillipsburg 1 SSE	United States	Record daily precipitation	46.7 mm (1.8 in)	32 of 100 (Routine)
Findlay Wpcc	United States	Record high minimum temperature	26.1 C (79.0 F)	32 of 100 (Routine)
Hayes Center 1NW	United States	Record daily precipitation	45.7 mm (1.8 in)	32 of 100 (Routine)
Cambridge Water Trmt P	United States	Record high maximum temperature	41.1 C (106.0 F)	29 of 100 (Routine)
Sheboygan	United States	Record high maximum temperature	40.0 C (104.0 F)	29 of 100 (Routine)
Springer	United States	Record daily precipitation	50.8 mm (2.0 in)	28 of 100 (Routine)
Napoleon	United States	Record high minimum temperature	25.6 C (78.1 F)	28 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	38.9 C (102.0 F)	28 of 100 (Routine)
Gospic	Croatia	Record daily precipitation	56.4 mm (2.2 in)	27 of 100 (Routine)
Crescent City 3 NNW	United States	Record high maximum temperature	33.9 C (93.0 F)	27 of 100 (Routine)
Takoma Park # 1	United States	Record high maximum temperature	39.4 C (102.9 F)	27 of 100 (Routine)
Columbus 3 NE	United States	Record daily precipitation	26.2 mm (1.0 in)	26 of 100 (Routine)
Holdrege	United States	Record daily precipitation	26.4 mm (1.0 in)	26 of 100 (Routine)
Tekamah	United States	Record daily precipitation	53.6 mm (2.1 in)	26 of 100 (Routine)
Chippewa Lake	United States	Record high minimum temperature	27.2 C (81.0 F)	26 of 100 (Routine)
Huntington 1	United States	Record high maximum temperature	40.0 C (104.0 F)	26 of 100 (Routine)
Frederick Police Brks	United States	Record high maximum temperature	42.2 C (108.0 F)	25 of 100 (Routine)
Adrian 2 NNE	United States	Record high minimum temperature	25.0 C (77.0 F)	25 of 100 (Routine)
Bloomington Indiana UNIV	United States	Record high minimum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Easton	United States	Record high maximum temperature	40.0 C (104.0 F)	24 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	24.4 C (75.9 F)	24 of 100 (Routine)
Cambridge St Hospital	United States	Record high minimum temperature	26.7 C (80.1 F)	24 of 100 (Routine)
Millport 4 NE	United States	Record high maximum temperature	37.8 C (100.0 F)	24 of 100 (Routine)
Rocky Mt	United States	Record high maximum temperature	38.3 C (100.9 F)	24 of 100 (Routine)
Morgantown 1	United States	Record high minimum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Oracle	United States	Record daily precipitation	40.9 mm (1.6 in)	23 of 100 (Routine)
Huntington	United States	Record high minimum temperature	24.4 C (75.9 F)	23 of 100 (Routine)
Wauseon Wtp	United States	Record high minimum temperature	25.6 C (78.1 F)	23 of 100 (Routine)
Greenville Dwtn AP	United States	Record high minimum temperature	23.3 C (73.9 F)	23 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record low maximum temperature	15.0 C (59.0 F)	22 of 100 (Routine)
Harlan	United States	Record daily precipitation	38.6 mm (1.5 in)	22 of 100 (Routine)
Saint Paul	United States	Record daily precipitation	36.3 mm (1.4 in)	22 of 100 (Routine)
Kenton	United States	Record high maximum temperature	38.9 C (102.0 F)	22 of 100 (Routine)
Mc Connellsville Lk 7	United States	Record high minimum temperature	24.4 C (75.9 F)	22 of 100 (Routine)
Spencer	United States	Record high minimum temperature	25.0 C (77.0 F)	22 of 100 (Routine)
Frederick Police Brks	United States	Record high minimum temperature	26.1 C (79.0 F)	21 of 100 (Routine)
Madison	United States	Record daily precipitation	40.6 mm (1.6 in)	21 of 100 (Routine)
Alexandria 4 WSW	United States	Record high minimum temperature	23.9 C (75.0 F)	21 of 100 (Routine)
Cambridge St Hospital	United States	Record high maximum temperature	38.3 C (100.9 F)	21 of 100 (Routine)
Toledo Blade	United States	Record high minimum temperature	24.4 C (75.9 F)	21 of 100 (Routine)
Waverly	United States	Record high minimum temperature	24.4 C (75.9 F)	21 of 100 (Routine)
Charlottesville 2W	United States	Record high minimum temperature	28.3 C (82.9 F)	21 of 100 (Routine)
Canon City	United States	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Shenkursk	Russia	Record daily precipitation	22.3 mm (0.9 in)	20 of 100 (Routine)
Boolcoomatta	Australia	Record daily precipitation	1.8 mm (0.07 in)	20 of 100 (Routine)
Sarna	Sweden	Record daily precipitation	21.0 mm (0.8 in)	20 of 100 (Routine)

Counts by Type and Timescale

521 records

Records set or tied on 21 July 1930 by type: Highest daily maximum 217, Lowest daily maximum 24, Highest daily minimum 204, Lowest daily minimum 8, Heaviest daily rainfall 68.

Records on 21 July 1930 by type
Record type	Records
Highest daily maximum	217
Lowest daily maximum	24
Highest daily minimum	204
Lowest daily minimum	8
Heaviest daily rainfall	68
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 1930 by timescale: all-time 32, monthly 33, daily 456.

How Much Records Were Beaten By

398 broken records

Margins by which the 398 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.5. Ties are not counted.

Top 20 by Significance

21 July 1930

Top 20 records on 21 July 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1930	Lake Moraine, US	daily rain	44.5 mm (1.8 in)	30.3 mm (1.2 in)	12 years	45 of 100 (Notable)
21 July 1930	Durango, US	monthly rain	58.4 mm (2.3 in)	15.2 mm (0.6 in)	32 years	44 of 100 (Notable)
21 July 1930	Stanton, US	daily rain	61.7 mm (2.4 in)	50.5 mm (2.0 in)	25 years	44 of 100 (Notable)
21 July 1930	Olekminsk, RU	daily rain	28.2 mm (1.1 in)	20.4 mm (0.8 in)	4 years	38 of 100 (Notable)
21 July 1930	Vickery 2 NW, US	all-time high min	27.8 C (82.0 F)	2.2 C (4.0 F)	33 years	38 of 100 (Notable)
21 July 1930	Trenton 2, US	all-time high max	38.3 C (100.9 F)	0.5 C (0.9 F)	35 years	37 of 100 (Notable)
21 July 1930	Bowling Green Wwtp, US	all-time high min	26.1 C (79.0 F)	0.5 C (0.9 F)	33 years	34 of 100 (Routine)
21 July 1930	Martinsburg E W Virginia Rgnl, US	all-time high min	30.0 C (86.0 F)	3.3 C (5.9 F)	0 years	34 of 100 (Routine)
21 July 1930	Viljujsk, RU	monthly rain	49.0 mm (1.9 in)	9.0 mm (0.35 in)	16 years	33 of 100 (Routine)
21 July 1930	Mc Cook, US	daily rain	53.3 mm (2.1 in)	34.2 mm (1.3 in)	24 years	33 of 100 (Routine)
21 July 1930	Norwalk Wwtp, US	all-time high min	26.1 C (79.0 F)	0.5 C (0.9 F)	33 years	33 of 100 (Routine)
21 July 1930	Norwalk, US	all-time high max	38.3 C (100.9 F)	0.5 C (0.9 F)	29 years	32 of 100 (Routine)
21 July 1930	Millsboro, US	all-time high max	43.3 C (109.9 F)	2.2 C (4.0 F)	11 years	32 of 100 (Routine)
21 July 1930	Greensburg, US	all-time high max	39.4 C (102.9 F)	0.5 C (0.9 F)	28 years	32 of 100 (Routine)
21 July 1930	Phillipsburg 1 SSE, US	daily rain	46.7 mm (1.8 in)	42.9 mm (1.7 in)	1 year	32 of 100 (Routine)
21 July 1930	Findlay Wpcc, US	all-time high min	26.1 C (79.0 F)	0.5 C (0.9 F)	28 years	32 of 100 (Routine)
21 July 1930	Hayes Center 1NW, US	daily rain	45.7 mm (1.8 in)	29.2 mm (1.1 in)	16 years	32 of 100 (Routine)
21 July 1930	Cambridge Water Trmt P, US	all-time high max	41.1 C (106.0 F)	1.1 C (2.0 F)	11 years	29 of 100 (Routine)
21 July 1930	Sheboygan, US	all-time high max	40.0 C (104.0 F)	0.6 C (1.1 F)	19 years	29 of 100 (Routine)
21 July 1930	Springer, US	daily rain	50.8 mm (2.0 in)	21.8 mm (0.9 in)	7 years	28 of 100 (Routine)

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 1930

Records set or tied on this calendar date in each year from 1794 to 1930. 1930 had 521 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 1930-07-21: 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 10	369
10 to 20	16
20 to 30	8
30 to 40	3
40 to 50	1
50 to 60	1