Weather Records on 4 October 1939

345 weather records were set or tied worldwide on 4 October 1939. Highest significance: Newport, US.

Key Facts for 4 October 1939

On 4 October 1939, 345 weather records were set or tied at long-record stations worldwide.
27 were record highs and 106 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 335 daily.
Newport set a daily record precipitation of 71.4 mm (2.8 in) on 4 October 1939.
Across 160 earlier years (1795 to 2026) the same calendar date averaged 465 records.

Record Map

345 stations

345 station records on 4 October 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 October 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Newport	United States	Record daily precipitation	71.4 mm (2.8 in)	54 of 100 (Notable)
Williams	Australia	Record daily precipitation	27.9 mm (1.1 in)	51 of 100 (Notable)
Margaret River 1	Australia	Record daily precipitation	67.3 mm (2.6 in)	49 of 100 (Notable)
Nephi 5 SSW	United States	Record daily precipitation	48.3 mm (1.9 in)	47 of 100 (Notable)
Serpentine	Australia	Record daily precipitation	44.5 mm (1.8 in)	42 of 100 (Notable)
Harvey Post Office	Australia	Record daily precipitation	32.8 mm (1.3 in)	42 of 100 (Notable)
Kalyanganj	India	Record daily precipitation	127.0 mm (5.0 in)	41 of 100 (Notable)
Kojonup	Australia	Record daily precipitation	27.9 mm (1.1 in)	39 of 100 (Notable)
Mount Barker	Australia	Record daily precipitation	27.4 mm (1.1 in)	37 of 100 (Notable)
Belvoir	Australia	Record daily precipitation	31.0 mm (1.2 in)	35 of 100 (Notable)
Kendenup	Australia	Record daily precipitation	31.8 mm (1.3 in)	35 of 100 (Notable)
Pinjarra	Australia	Record daily precipitation	31.2 mm (1.2 in)	35 of 100 (Notable)
Collie	Australia	Record daily precipitation	45.0 mm (1.8 in)	32 of 100 (Routine)
Dewetsdorp (Pol)	South Africa	Record daily precipitation	45.7 mm (1.8 in)	32 of 100 (Routine)
Palladam	India	Record daily precipitation	80.0 mm (3.1 in)	30 of 100 (Routine)
Mc Minnville	United States	Record daily precipitation	27.7 mm (1.1 in)	30 of 100 (Routine)
Petrusberg (Pol)	South Africa	Record daily precipitation	29.2 mm (1.1 in)	29 of 100 (Routine)
Armadale	Australia	Record daily precipitation	41.7 mm (1.6 in)	28 of 100 (Routine)
Wandering Comparison	Australia	Record daily precipitation	25.9 mm (1.0 in)	28 of 100 (Routine)
Philipstown (Tnk)	South Africa	Record daily precipitation	26.2 mm (1.0 in)	27 of 100 (Routine)
Levan	United States	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Jarrahdale	Australia	Record daily precipitation	48.0 mm (1.9 in)	26 of 100 (Routine)
Deols Chateauroux Aerodrome de	France	Record daily precipitation	38.6 mm (1.5 in)	26 of 100 (Routine)
Gorlitz	Germany	Record low minimum temperature	-1.7 C (28.9 F)	26 of 100 (Routine)
Biswan	India	Record daily precipitation	101.9 mm (4.0 in)	26 of 100 (Routine)
Headworks Portland Wtr B	United States	Record daily precipitation	48.8 mm (1.9 in)	26 of 100 (Routine)
Levan	United States	Record daily snowfall	5.1 cm (2.0 in)	26 of 100 (Routine)
N Bend SW Oregon Rgnl AP	United States	Record daily precipitation	31.0 mm (1.2 in)	26 of 100 (Routine)
Rockingham Post Office	Australia	Record daily precipitation	26.9 mm (1.1 in)	25 of 100 (Routine)
Blythwood	Australia	Record daily precipitation	28.7 mm (1.1 in)	25 of 100 (Routine)
Latrobe (Coal Road)	Australia	Record daily precipitation	46.7 mm (1.8 in)	25 of 100 (Routine)
Fairmont	United States	Record daily precipitation	54.9 mm (2.2 in)	25 of 100 (Routine)
Berry Brow	Australia	Record daily precipitation	29.5 mm (1.2 in)	24 of 100 (Routine)
Barkerville	Canada	Record daily snowfall	11.4 cm (4.5 in)	24 of 100 (Routine)
Weldon	United States	Record low maximum temperature	16.1 C (61.0 F)	24 of 100 (Routine)
Marungapuri	India	Record daily precipitation	70.6 mm (2.8 in)	23 of 100 (Routine)
Umzimkulu (Tnk)	South Africa	Record daily precipitation	25.4 mm (1.0 in)	23 of 100 (Routine)
Lares	Puerto Rico [United States]	Record daily precipitation	98.6 mm (3.9 in)	22 of 100 (Routine)
Beaver Lake	Canada	Record daily precipitation	25.9 mm (1.0 in)	21 of 100 (Routine)
Solomons	United States	Record low maximum temperature	14.4 C (57.9 F)	21 of 100 (Routine)
Cranbrook	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Arthur River	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Moana	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Hopetoun	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Denninup Vale	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Katanning Comparison	Australia	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
Ellensfield	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Broomehill	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Cape Riche	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Bunkin	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Wagin	Australia	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Uralsk	Kazakhstan	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Woogenellup	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Beaconsfield (Mine & Heritage	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Heber	United States	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Olekminsk	Russia	Record daily precipitation	4.0 mm (0.16 in)	20 of 100 (Routine)
South Pass City	United States	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Gabyon	Australia	Record daily precipitation	2.8 mm (0.11 in)	20 of 100 (Routine)
Fremantle	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Barkerville	Canada	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)

Counts by Type and Timescale

345 records

Records set or tied on 4 October 1939 by type: Highest daily maximum 11, Lowest daily maximum 74, Highest daily minimum 16, Lowest daily minimum 32, Heaviest daily rainfall 210, Heaviest daily snowfall 2.

Records on 4 October 1939 by type
Record type	Records
Highest daily maximum	11
Lowest daily maximum	74
Highest daily minimum	16
Lowest daily minimum	32
Heaviest daily rainfall	210
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 4 October 1939 by timescale: all-time 0, monthly 10, daily 335.

How Much Records Were Beaten By

300 broken records

Margins by which the 300 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 89.0. Ties are not counted.

Top 20 by Significance

4 October 1939

Top 20 records on 4 October 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 October 1939	Newport, US	daily rain	71.4 mm (2.8 in)	52.3 mm (2.1 in)	33 years	54 of 100 (Notable)
4 October 1939	Williams, AU	daily rain	27.9 mm (1.1 in)	23.8 mm (0.9 in)	20 years	51 of 100 (Notable)
4 October 1939	Margaret River 1, AU	monthly rain	67.3 mm (2.6 in)	21.6 mm (0.9 in)	6 years	49 of 100 (Notable)
4 October 1939	Nephi 5 SSW, US	monthly rain	48.3 mm (1.9 in)	17.8 mm (0.7 in)	30 years	47 of 100 (Notable)
4 October 1939	Serpentine, AU	monthly rain	44.5 mm (1.8 in)	14.5 mm (0.6 in)	17 years	42 of 100 (Notable)
4 October 1939	Harvey Post Office, AU	daily rain	32.8 mm (1.3 in)	21.1 mm (0.8 in)	16 years	42 of 100 (Notable)
4 October 1939	Kalyanganj, IN	daily rain	127.0 mm (5.0 in)	86.4 mm (3.4 in)	29 years	41 of 100 (Notable)
4 October 1939	Kojonup, AU	daily rain	27.9 mm (1.1 in)	14.4 mm (0.6 in)	12 years	39 of 100 (Notable)
4 October 1939	Mount Barker, AU	daily rain	27.4 mm (1.1 in)	16.2 mm (0.6 in)	14 years	37 of 100 (Notable)
4 October 1939	Belvoir, AU	daily rain	31.0 mm (1.2 in)	14.7 mm (0.6 in)	22 years	35 of 100 (Notable)
4 October 1939	Kendenup, AU	daily rain	31.8 mm (1.3 in)	17.1 mm (0.7 in)	12 years	35 of 100 (Notable)
4 October 1939	Pinjarra, AU	daily rain	31.2 mm (1.2 in)	15.2 mm (0.6 in)	16 years	35 of 100 (Notable)
4 October 1939	Collie, AU	monthly rain	45.0 mm (1.8 in)	6.6 mm (0.26 in)	28 years	32 of 100 (Routine)
4 October 1939	Dewetsdorp (Pol), ZA	daily rain	45.7 mm (1.8 in)	34.5 mm (1.4 in)	8 years	32 of 100 (Routine)
4 October 1939	Palladam, IN	daily rain	80.0 mm (3.1 in)	53.8 mm (2.1 in)	5 years	30 of 100 (Routine)
4 October 1939	Mc Minnville, US	daily rain	27.7 mm (1.1 in)	11.7 mm (0.5 in)	33 years	30 of 100 (Routine)
4 October 1939	Petrusberg (Pol), ZA	daily rain	29.2 mm (1.1 in)	24.6 mm (1.0 in)	12 years	29 of 100 (Routine)
4 October 1939	Armadale, AU	daily rain	41.7 mm (1.6 in)	14.3 mm (0.6 in)	12 years	28 of 100 (Routine)
4 October 1939	Wandering Comparison, AU	daily rain	25.9 mm (1.0 in)	11.2 mm (0.4 in)	16 years	28 of 100 (Routine)
4 October 1939	Philipstown (Tnk), ZA	daily rain	26.2 mm (1.0 in)	7.1 mm (0.28 in)	46 years	27 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

1795 to 1939

Records set or tied on this calendar date in each year from 1795 to 1939. 1939 had 345 records.

Counts for years before the ledger starts come from the same station rules.

Records on 10-04 in each year
Year	Records
1795	1
1802	1
1841	2
1843	1
1844	2
1847	2
1853	1
1859	1
1864	8
1865	2
1867	1
1868	1
1873	1
1875	1
1876	1
1878	1
1880	1
1881	3
1882	1
1883	3
1884	4
1885	2
1886	3
1888	5
1889	2
1890	1
1891	3
1892	2
1893	2
1894	3
1895	3
1896	3
1898	4
1899	1
1900	3
1901	9
1902	5
1903	8
1904	5
1905	11
1906	29
1907	10
1908	18
1909	13
1910	21
1911	23
1912	101
1913	12
1914	18
1915	13
1916	137
1917	157
1918	127
1919	30
1920	31
1921	46
1922	44
1923	21
1924	63
1925	130
1926	255
1927	172
1928	131
1929	339
1930	244
1931	361
1932	413
1933	299
1934	121
1935	833
1936	161
1937	483
1938	440
1939	345
1940	220
1941	850
1942	198
1943	426
1944	328
1945	543
1946	314
1947	592
1948	449
1949	491
1950	565
1951	617
1952	717
1953	358
1954	999
1955	630
1956	467
1957	533
1958	704
1959	812
1960	246
1961	758
1962	313
1963	528
1964	389
1965	760
1966	464
1967	440
1968	587
1969	628
1970	539
1971	361
1972	712
1973	604
1974	1,846
1975	681
1976	869
1977	517
1978	488
1979	733
1980	975
1981	994
1982	415
1983	762
1984	864
1985	863
1986	1,265
1987	1,502
1988	713
1989	742
1990	845
1991	813
1992	866
1993	956
1994	1,341
1995	1,192
1996	1,012
1997	928
1998	1,487
1999	1,596
2000	917
2001	547
2002	1,465
2003	610
2004	562
2005	1,973
2006	987
2007	997
2008	935
2009	1,431
2010	1,230
2011	919
2012	864
2013	1,130
2014	611
2015	741
2016	680
2017	780
2018	979
2019	1,131
2020	897
2021	644
2022	561
2023	936
2024	1,197
2025	979
2026	942

Download the Data

Data for records on 1939-10-04: 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 20	283
20 to 40	11
40 to 60	4
60 to 80	0
80 to 100	2