Weather Records on 20 July 1939

336 weather records were set or tied worldwide on 20 July 1939. Highest significance: Pipestone, US.

Key Facts for 20 July 1939

On 20 July 1939, 336 weather records were set or tied at long-record stations worldwide.
143 were record highs and 79 were record lows, counting maximum and minimum temperature.
By timescale, 9 were all-time records, 3 monthly and 324 daily.
Pipestone set a daily record precipitation of 48.3 mm (1.9 in) on 20 July 1939.
Across 161 earlier years (1809 to 2026) the same calendar date averaged 460 records.

Record Map

336 stations

336 station records on 20 July 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 July 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Pipestone	United States	Record daily precipitation	48.3 mm (1.9 in)	52 of 100 (Notable)
Inwood 2 SW	United States	Record daily precipitation	52.3 mm (2.1 in)	51 of 100 (Notable)
Elatma	Russia	Record daily precipitation	48.4 mm (1.9 in)	43 of 100 (Notable)
Nandigama	India	Record daily precipitation	67.3 mm (2.6 in)	39 of 100 (Notable)
Osceola	United States	Record daily precipitation	37.1 mm (1.5 in)	37 of 100 (Notable)
Humboldt	Canada	Record daily precipitation	48.3 mm (1.9 in)	36 of 100 (Notable)
Mahuadaur	India	Record daily precipitation	113.8 mm (4.5 in)	36 of 100 (Notable)
Siwan	India	Record daily precipitation	104.9 mm (4.1 in)	35 of 100 (Notable)
Saskatoon Diefenbaker Int'l A	Canada	Record daily precipitation	39.1 mm (1.5 in)	34 of 100 (Routine)
Ironton	United States	Record daily precipitation	69.1 mm (2.7 in)	34 of 100 (Routine)
Samastipur	India	Record daily precipitation	102.9 mm (4.1 in)	33 of 100 (Routine)
Isabela Substn	Puerto Rico [United States]	Record daily precipitation	70.9 mm (2.8 in)	33 of 100 (Routine)
St John's	Canada	Record daily precipitation	41.1 mm (1.6 in)	31 of 100 (Routine)
Leavenworth	United States	Record high minimum temperature	31.1 C (88.0 F)	31 of 100 (Routine)
Point Pleasant	United States	Record daily precipitation	26.2 mm (1.0 in)	31 of 100 (Routine)
Leopold Downs	Australia	Record daily precipitation	50.8 mm (2.0 in)	30 of 100 (Routine)
Gudivada	India	Record daily precipitation	61.2 mm (2.4 in)	30 of 100 (Routine)
Jaggiayapet	India	Record daily precipitation	62.7 mm (2.5 in)	28 of 100 (Routine)
Attarikhat	India	Record daily precipitation	139.2 mm (5.5 in)	28 of 100 (Routine)
Woodstock 2 NE	United States	Record daily precipitation	32.8 mm (1.3 in)	26 of 100 (Routine)
Chinook	United States	Record low maximum temperature	17.2 C (63.0 F)	25 of 100 (Routine)
Alliance 1WNW	United States	Record high maximum temperature	42.2 C (108.0 F)	25 of 100 (Routine)
Settle	United States	Record daily precipitation	66.8 mm (2.6 in)	25 of 100 (Routine)
Danville 2 SE	United States	Record daily precipitation	45.5 mm (1.8 in)	25 of 100 (Routine)
Rajahmundry	India	Record daily precipitation	77.0 mm (3.0 in)	24 of 100 (Routine)
Saidpur Bhitari	India	Record daily precipitation	103.9 mm (4.1 in)	24 of 100 (Routine)
Skara 1	Sweden	Record daily precipitation	27.1 mm (1.1 in)	24 of 100 (Routine)
Las Vegas 2 NW	United States	Record high minimum temperature	22.2 C (72.0 F)	24 of 100 (Routine)
Ironton	United States	Record low maximum temperature	23.3 C (73.9 F)	24 of 100 (Routine)
Lanka	India	Record daily precipitation	50.8 mm (2.0 in)	23 of 100 (Routine)
Kamakhyanagar	India	Record daily precipitation	81.5 mm (3.2 in)	23 of 100 (Routine)
Pickens 1	United States	Record daily precipitation	30.5 mm (1.2 in)	23 of 100 (Routine)
Calera	United States	Record daily precipitation	71.9 mm (2.8 in)	22 of 100 (Routine)
Port Gibson 1 NE	United States	Record high maximum temperature	37.2 C (99.0 F)	22 of 100 (Routine)
Dale Enterprise	United States	Record daily precipitation	54.6 mm (2.1 in)	22 of 100 (Routine)
Staunton Wtp	United States	Record low maximum temperature	19.4 C (66.9 F)	22 of 100 (Routine)
Bathurst	Canada	Record low maximum temperature	19.4 C (66.9 F)	21 of 100 (Routine)
Kovvur	India	Record daily precipitation	82.6 mm (3.3 in)	21 of 100 (Routine)
Ft Collins	United States	Record high maximum temperature	38.3 C (100.9 F)	21 of 100 (Routine)
Buckhannon	United States	Record low maximum temperature	21.1 C (70.0 F)	21 of 100 (Routine)
Parsons 3 SE	United States	Record low maximum temperature	20.6 C (69.1 F)	21 of 100 (Routine)
Machadodorp	South Africa	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Missoula 6 NW WFO	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Kimberley Downs	Australia	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Barrow Creek	Australia	Record daily precipitation	0.8 mm (0.03 in)	20 of 100 (Routine)
Cape Riche	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Derby Post Office	Australia	Record daily precipitation	1.3 mm (0.05 in)	20 of 100 (Routine)
Chemnitz	Germany	Record daily precipitation	23.3 mm (0.9 in)	20 of 100 (Routine)
Ovando	United States	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Liveringa Upper	Australia	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Ljubljana Bezigrad	Slovenia	Record high maximum temperature	33.6 C (92.5 F)	20 of 100 (Routine)
Oneonta	United States	Record daily precipitation	43.2 mm (1.7 in)	20 of 100 (Routine)
Prineville	United States	Record low minimum temperature	-1.1 C (30.0 F)	20 of 100 (Routine)
Romney 1 SW	United States	Record low maximum temperature	23.9 C (75.0 F)	20 of 100 (Routine)
Flora Valley Old	Australia	Record daily precipitation	4.3 mm (0.17 in)	19 of 100 (Routine)
Old Halls Creek	Australia	Record daily precipitation	1.0 mm (0.04 in)	19 of 100 (Routine)
Sorell (Whitlea)	Australia	Record daily precipitation	5.1 mm (0.20 in)	19 of 100 (Routine)
Dawson	Canada	Record high maximum temperature	31.1 C (88.0 F)	19 of 100 (Routine)
Banff	Canada	Record low maximum temperature	11.1 C (52.0 F)	19 of 100 (Routine)
Ulm	Germany	Record daily precipitation	25.6 mm (1.0 in)	19 of 100 (Routine)

Counts by Type and Timescale

336 records

Records set or tied on 20 July 1939 by type: Highest daily maximum 116, Lowest daily maximum 52, Highest daily minimum 27, Lowest daily minimum 27, Heaviest daily rainfall 114.

Records on 20 July 1939 by type
Record type	Records
Highest daily maximum	116
Lowest daily maximum	52
Highest daily minimum	27
Lowest daily minimum	27
Heaviest daily rainfall	114
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 July 1939 by timescale: all-time 9, monthly 3, daily 324.

How Much Records Were Beaten By

256 broken records

Margins by which the 256 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 74.7. Ties are not counted.

Top 20 by Significance

20 July 1939

Top 20 records on 20 July 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 July 1939	Pipestone, US	daily rain	48.3 mm (1.9 in)	36.9 mm (1.5 in)	34 years	52 of 100 (Notable)
20 July 1939	Inwood 2 SW, US	daily rain	52.3 mm (2.1 in)	49.5 mm (1.9 in)	28 years	51 of 100 (Notable)
20 July 1939	Elatma, RU	daily rain	48.4 mm (1.9 in)	19.2 mm (0.8 in)	45 years	43 of 100 (Notable)
20 July 1939	Nandigama, IN	daily rain	67.3 mm (2.6 in)	39.9 mm (1.6 in)	24 years	39 of 100 (Notable)
20 July 1939	Osceola, US	daily rain	37.1 mm (1.5 in)	32.5 mm (1.3 in)	42 years	37 of 100 (Notable)
20 July 1939	Humboldt, CA	daily rain	48.3 mm (1.9 in)	29.2 mm (1.1 in)	5 years	36 of 100 (Notable)
20 July 1939	Mahuadaur, IN	daily rain	113.8 mm (4.5 in)	74.4 mm (2.9 in)	4 years	36 of 100 (Notable)
20 July 1939	Siwan, IN	daily rain	104.9 mm (4.1 in)	74.7 mm (2.9 in)	13 years	35 of 100 (Notable)
20 July 1939	Saskatoon Diefenbaker Int'l A, CA	daily rain	39.1 mm (1.5 in)	25.6 mm (1.0 in)	12 years	34 of 100 (Routine)
20 July 1939	Ironton, US	daily rain	69.1 mm (2.7 in)	37.1 mm (1.5 in)	13 years	34 of 100 (Routine)
20 July 1939	Samastipur, IN	daily rain	102.9 mm (4.1 in)	74.7 mm (2.9 in)	12 years	33 of 100 (Routine)
20 July 1939	Isabela Substn, PR	daily rain	70.9 mm (2.8 in)	40.4 mm (1.6 in)	12 years	33 of 100 (Routine)
20 July 1939	St John's, CA	daily rain	41.1 mm (1.6 in)	7.3 mm (0.29 in)	56 years	31 of 100 (Routine)
20 July 1939	Leavenworth, US	daily high min	31.1 C (88.0 F)	5.5 C (9.9 F)	37 years	31 of 100 (Routine)
20 July 1939	Point Pleasant, US	daily rain	26.2 mm (1.0 in)	15.3 mm (0.6 in)	46 years	31 of 100 (Routine)
20 July 1939	Leopold Downs, AU	monthly rain	50.8 mm (2.0 in)	10.7 mm (0.4 in)	20 years	30 of 100 (Routine)
20 July 1939	Gudivada, IN	daily rain	61.2 mm (2.4 in)	29.4 mm (1.2 in)	26 years	30 of 100 (Routine)
20 July 1939	Jaggiayapet, IN	daily rain	62.7 mm (2.5 in)	25.6 mm (1.0 in)	24 years	28 of 100 (Routine)
20 July 1939	Attarikhat, IN	daily rain	139.2 mm (5.5 in)	61.7 mm (2.4 in)	14 years	28 of 100 (Routine)
20 July 1939	Woodstock 2 NE, US	daily rain	32.8 mm (1.3 in)	14.3 mm (0.6 in)	20 years	26 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 1939

Records set or tied on this calendar date in each year from 1809 to 1939. 1939 had 336 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 1939-07-20: 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 10	209
10 to 20	21
20 to 30	13
30 to 40	6
40 to 50	2
50 to 60	1
60 to 70	1
70 to 80	3