Weather Records on 20 July 1930

598 weather records were set or tied worldwide on 20 July 1930. Highest significance: Jonkoping, SE.

Key Facts for 20 July 1930

On 20 July 1930, 598 weather records were set or tied at long-record stations worldwide.
518 were record highs and 28 were record lows, counting maximum and minimum temperature.
By timescale, 35 were all-time records, 38 monthly and 525 daily.
Jonkoping set a daily record precipitation of 46.4 mm (1.8 in) on 20 July 1930.
Across 161 earlier years (1809 to 2026) the same calendar date averaged 458 records.

Record Map

598 stations

598 station records on 20 July 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 July 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jonkoping	Sweden	Record daily precipitation	46.4 mm (1.8 in)	67 of 100 (Major)
Nesbyen	Norway	Record daily precipitation	35.0 mm (1.4 in)	48 of 100 (Notable)
Hiasen I Sigdal	Norway	Record daily precipitation	50.6 mm (2.0 in)	46 of 100 (Notable)
Fort Macleod	Canada	Record daily precipitation	32.5 mm (1.3 in)	42 of 100 (Notable)
Sarna	Sweden	Record daily precipitation	56.6 mm (2.2 in)	40 of 100 (Notable)
Martinsburg E W Virginia Rgnl	United States	Record high minimum temperature	26.7 C (80.1 F)	40 of 100 (Notable)
Durham	United Kingdom	Record daily precipitation	35.7 mm (1.4 in)	38 of 100 (Notable)
Cheyenne Wells 2NE	United States	Record daily precipitation	30.5 mm (1.2 in)	36 of 100 (Notable)
World Trade Ctr	United States	Record high minimum temperature	26.7 C (80.1 F)	36 of 100 (Notable)
Easton	United States	Record high maximum temperature	39.4 C (102.9 F)	35 of 100 (Notable)
Laurel 3 W	United States	Record high maximum temperature	41.1 C (106.0 F)	35 of 100 (Notable)
Koshkonong	United States	Record high minimum temperature	27.8 C (82.0 F)	34 of 100 (Routine)
Chippewa Lake	United States	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Princess Anne	United States	Record high maximum temperature	40.6 C (105.1 F)	33 of 100 (Routine)
Astoria	United States	Record low minimum temperature	5.0 C (41.0 F)	33 of 100 (Routine)
Great Falls	United States	Record high maximum temperature	40.6 C (105.1 F)	32 of 100 (Routine)
Olekminsk	Russia	Record daily precipitation	64.6 mm (2.5 in)	31 of 100 (Routine)
Mt Carroll	United States	Record high minimum temperature	28.9 C (84.0 F)	31 of 100 (Routine)
Mc Cook	United States	Record daily precipitation	99.1 mm (3.9 in)	31 of 100 (Routine)
Circleville	United States	Record high maximum temperature	42.8 C (109.0 F)	31 of 100 (Routine)
Norwalk Wwtp	United States	Record high maximum temperature	41.7 C (107.1 F)	31 of 100 (Routine)
Sheffield	United Kingdom	Record daily precipitation	50.1 mm (2.0 in)	30 of 100 (Routine)
Dover	United States	Record high minimum temperature	25.6 C (78.1 F)	30 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record daily precipitation	43.9 mm (1.7 in)	29 of 100 (Routine)
Wayne	United States	Record high maximum temperature	40.0 C (104.0 F)	29 of 100 (Routine)
Ironton	United States	Record high maximum temperature	40.6 C (105.1 F)	29 of 100 (Routine)
Kenton	United States	Record high maximum temperature	40.0 C (104.0 F)	29 of 100 (Routine)
Lancaster 2 NW	United States	Record high maximum temperature	41.1 C (106.0 F)	29 of 100 (Routine)
Mc Connellsville Lk 7	United States	Record high maximum temperature	40.6 C (105.1 F)	29 of 100 (Routine)
Charlottesville 2W	United States	Record high maximum temperature	41.7 C (107.1 F)	29 of 100 (Routine)
Morgantown 1	United States	Record high minimum temperature	25.0 C (77.0 F)	29 of 100 (Routine)
Ulricehamn	Sweden	Record daily precipitation	25.0 mm (1.0 in)	28 of 100 (Routine)
College Park	United States	Record high maximum temperature	41.7 C (107.1 F)	27 of 100 (Routine)
Cambridge St Hospital	United States	Record high maximum temperature	39.4 C (102.9 F)	27 of 100 (Routine)
Napoleon	United States	Record high maximum temperature	41.1 C (106.0 F)	27 of 100 (Routine)
Ny City Cntrl Park	United States	Record high minimum temperature	27.2 C (81.0 F)	27 of 100 (Routine)
Halden	Norway	Record daily precipitation	31.0 mm (1.2 in)	26 of 100 (Routine)
Woodstock 2 NE	United States	Record high maximum temperature	42.8 C (109.0 F)	26 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	25.6 C (78.1 F)	26 of 100 (Routine)
Sveg	Sweden	Record daily precipitation	25.9 mm (1.0 in)	25 of 100 (Routine)
Malvern	United Kingdom	Record daily precipitation	26.0 mm (1.0 in)	25 of 100 (Routine)
Uniontown 1 NE	United States	Record high maximum temperature	37.8 C (100.0 F)	25 of 100 (Routine)
Baltimore Customs House	United States	Record high minimum temperature	26.7 C (80.1 F)	25 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	24.4 C (75.9 F)	24 of 100 (Routine)
Bowling Green Wwtp	United States	Record high maximum temperature	41.1 C (106.0 F)	24 of 100 (Routine)
Bucyrus	United States	Record high maximum temperature	40.0 C (104.0 F)	24 of 100 (Routine)
Marion	United States	Record high maximum temperature	38.9 C (102.0 F)	24 of 100 (Routine)
Wauseon Wtp	United States	Record high maximum temperature	40.0 C (104.0 F)	24 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	38.9 C (102.0 F)	24 of 100 (Routine)
Fort Macleod	Canada	Record low maximum temperature	14.4 C (57.9 F)	23 of 100 (Routine)
Postmyr I Drangedal	Norway	Record daily precipitation	25.3 mm (1.0 in)	23 of 100 (Routine)
Butlerville 2 WNW	United States	Record high maximum temperature	39.4 C (102.9 F)	23 of 100 (Routine)
Ft Wayne City	United States	Record high minimum temperature	25.6 C (78.1 F)	23 of 100 (Routine)
Vickery 2 NW	United States	Record high maximum temperature	40.0 C (104.0 F)	23 of 100 (Routine)
Milbank 4 NW	United States	Record daily precipitation	39.4 mm (1.6 in)	23 of 100 (Routine)
Lost Creek Near	United States	Record high maximum temperature	37.8 C (100.0 F)	23 of 100 (Routine)
Bird Rocks	Canada	Record high minimum temperature	16.7 C (62.1 F)	22 of 100 (Routine)
Tranebjerg	Denmark	Record low maximum temperature	15.7 C (60.3 F)	22 of 100 (Routine)
Orje	Norway	Record daily precipitation	36.2 mm (1.4 in)	22 of 100 (Routine)
Madison Sewage Plt	United States	Record high maximum temperature	40.6 C (105.1 F)	22 of 100 (Routine)

Counts by Type and Timescale

598 records

Records set or tied on 20 July 1930 by type: Highest daily maximum 284, Lowest daily maximum 15, Highest daily minimum 234, Lowest daily minimum 13, Heaviest daily rainfall 52.

Records on 20 July 1930 by type
Record type	Records
Highest daily maximum	284
Lowest daily maximum	15
Highest daily minimum	234
Lowest daily minimum	13
Heaviest daily rainfall	52
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 July 1930 by timescale: all-time 35, monthly 38, daily 525.

How Much Records Were Beaten By

441 broken records

Margins by which the 441 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 37.4. Ties are not counted.

Top 20 by Significance

20 July 1930

Top 20 records on 20 July 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 July 1930	Jonkoping, SE	daily rain	46.4 mm (1.8 in)	28.4 mm (1.1 in)	69 years	67 of 100 (Major)
20 July 1930	Nesbyen, NO	daily rain	35.0 mm (1.4 in)	27.8 mm (1.1 in)	16 years	48 of 100 (Notable)
20 July 1930	Hiasen I Sigdal, NO	daily rain	50.6 mm (2.0 in)	37.4 mm (1.5 in)	15 years	46 of 100 (Notable)
20 July 1930	Fort Macleod, CA	daily rain	32.5 mm (1.3 in)	25.6 mm (1.0 in)	33 years	42 of 100 (Notable)
20 July 1930	Sarna, SE	monthly rain	56.6 mm (2.2 in)	14.8 mm (0.6 in)	7 years	40 of 100 (Notable)
20 July 1930	Martinsburg E W Virginia Rgnl, US	all-time high min	26.7 C (80.1 F)	1.7 C (3.1 F)	37 years	40 of 100 (Notable)
20 July 1930	Durham, GB	daily rain	35.7 mm (1.4 in)	16.0 mm (0.6 in)	32 years	38 of 100 (Notable)
20 July 1930	Cheyenne Wells 2NE, US	daily rain	30.5 mm (1.2 in)	27.5 mm (1.1 in)	32 years	36 of 100 (Notable)
20 July 1930	World Trade Ctr, US	daily high min	26.7 C (80.1 F)	3.4 C (6.1 F)	53 years	36 of 100 (Notable)
20 July 1930	Easton, US	all-time high max	39.4 C (102.9 F)	1.1 C (2.0 F)	32 years	35 of 100 (Notable)
20 July 1930	Laurel 3 W, US	all-time high max	41.1 C (106.0 F)	1.1 C (2.0 F)	32 years	35 of 100 (Notable)
20 July 1930	Koshkonong, US	daily high min	27.8 C (82.0 F)	5.6 C (10.1 F)	28 years	34 of 100 (Routine)
20 July 1930	Chippewa Lake, US	all-time high min	25.6 C (78.1 F)	1.2 C (2.2 F)	33 years	34 of 100 (Routine)
20 July 1930	Princess Anne, US	all-time high max	40.6 C (105.1 F)	2.8 C (5.0 F)	3 years	33 of 100 (Routine)
20 July 1930	Astoria, US	daily low min	5.0 C (41.0 F)	3.3 C (5.9 F)	36 years	33 of 100 (Routine)
20 July 1930	Great Falls, US	all-time high max	40.6 C (105.1 F)	0.6 C (1.1 F)	28 years	32 of 100 (Routine)
20 July 1930	Olekminsk, RU	all-time rain	64.6 mm (2.5 in)	0.9 mm (0.04 in)	21 years	31 of 100 (Routine)
20 July 1930	Mt Carroll, US	all-time high min	28.9 C (84.0 F)	2.2 C (4.0 F)	12 years	31 of 100 (Routine)
20 July 1930	Mc Cook, US	monthly rain	99.1 mm (3.9 in)	15.3 mm (0.6 in)	28 years	31 of 100 (Routine)
20 July 1930	Circleville, US	all-time high max	42.8 C (109.0 F)	1.7 C (3.1 F)	11 years	31 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

1809 to 1930

Records set or tied on this calendar date in each year from 1809 to 1930. 1930 had 598 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 1930-07-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 5	414
5 to 10	9
10 to 15	9
15 to 20	4
20 to 25	0
25 to 30	4
30 to 35	0
35 to 40	1