Weather Records on 20 October 1939

367 weather records were set or tied worldwide on 20 October 1939. Highest significance: Ayrshire Downs, AU.

Key Facts for 20 October 1939

On 20 October 1939, 367 weather records were set or tied at long-record stations worldwide.
160 were record highs and 8 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 9 monthly and 357 daily.
Ayrshire Downs set a monthly record daily precipitation of 72.1 mm (2.8 in) on 20 October 1939.
Across 160 earlier years (1806 to 2025) the same calendar date averaged 458 records.

Record Map

367 stations

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

Weather records on 20 October 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ayrshire Downs	Australia	Record daily precipitation	72.1 mm (2.8 in)	67 of 100 (Major)
Maneroo	Australia	Record daily precipitation	48.3 mm (1.9 in)	58 of 100 (Notable)
Wellwood	South Africa	Record daily precipitation	35.8 mm (1.4 in)	52 of 100 (Notable)
Vryburg (Pol)	South Africa	Record daily precipitation	26.9 mm (1.1 in)	46 of 100 (Notable)
Ft Pierce	United States	Record daily precipitation	118.1 mm (4.6 in)	46 of 100 (Notable)
Alamur(Alamar)	India	Record daily precipitation	154.7 mm (6.1 in)	45 of 100 (Notable)
Canobie	Australia	Record daily precipitation	26.7 mm (1.1 in)	43 of 100 (Notable)
Bakensrug	South Africa	Record daily precipitation	29.2 mm (1.1 in)	42 of 100 (Notable)
Camooweal Township	Australia	Record daily precipitation	31.8 mm (1.3 in)	41 of 100 (Notable)
Winton Post Office	Australia	Record daily precipitation	47.8 mm (1.9 in)	40 of 100 (Notable)
Coorabulka	Australia	Record daily precipitation	52.8 mm (2.1 in)	40 of 100 (Notable)
Kareekloof	South Africa	Record daily precipitation	40.6 mm (1.6 in)	39 of 100 (Notable)
Alur	India	Record daily precipitation	155.2 mm (6.1 in)	38 of 100 (Notable)
Lorraine	Australia	Record daily precipitation	32.3 mm (1.3 in)	37 of 100 (Notable)
Millungera Station	Australia	Record daily precipitation	40.6 mm (1.6 in)	37 of 100 (Notable)
Barsi	India	Record daily precipitation	55.4 mm (2.2 in)	37 of 100 (Notable)
Cork Station	Australia	Record daily precipitation	50.8 mm (2.0 in)	36 of 100 (Notable)
San Jacinto	United States	Record high minimum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Evesham Station	Australia	Record daily precipitation	31.2 mm (1.2 in)	33 of 100 (Routine)
Sonamarg &	India	Record daily precipitation	50.3 mm (2.0 in)	33 of 100 (Routine)
Taung	South Africa	Record daily precipitation	30.2 mm (1.2 in)	33 of 100 (Routine)
Cairns Post Office	Australia	Record low maximum temperature	24.1 C (75.4 F)	31 of 100 (Routine)
Enngonia (Belalie)	Australia	Record daily precipitation	26.7 mm (1.1 in)	31 of 100 (Routine)
Tenkasi	India	Record daily precipitation	97.5 mm (3.8 in)	31 of 100 (Routine)
Morokweng (Pol)	South Africa	Record daily precipitation	38.1 mm (1.5 in)	29 of 100 (Routine)
De Vlei "de Kruis"	South Africa	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Zoetvlei	South Africa	Record daily precipitation	29.7 mm (1.2 in)	26 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	23.3 C (73.9 F)	26 of 100 (Routine)
Corona Downs	Australia	Record daily precipitation	29.2 mm (1.1 in)	25 of 100 (Routine)
Kieskamahoek (Pol)	South Africa	Record daily precipitation	30.2 mm (1.2 in)	25 of 100 (Routine)
Columbia Falls 5 SW	United States	Record high minimum temperature	9.4 C (48.9 F)	25 of 100 (Routine)
Fort Chipewyan	Canada	Record low minimum temperature	-21.1 C (-6.0 F)	24 of 100 (Routine)
Urandangi	Australia	Record daily precipitation	33.5 mm (1.3 in)	23 of 100 (Routine)
Port Said	Egypt	Record high maximum temperature	35.0 C (95.0 F)	23 of 100 (Routine)
Murraysburg (Pol)	South Africa	Record daily precipitation	36.8 mm (1.4 in)	23 of 100 (Routine)
Kalispell Glacier AP	United States	Record high minimum temperature	9.4 C (48.9 F)	23 of 100 (Routine)
Granada Station	Australia	Record daily precipitation	27.2 mm (1.1 in)	22 of 100 (Routine)
Mudigere	India	Record daily precipitation	51.3 mm (2.0 in)	22 of 100 (Routine)
Elliotdale (Tnk)	South Africa	Record daily precipitation	26.4 mm (1.0 in)	22 of 100 (Routine)
La Ctr	United States	Record high minimum temperature	12.2 C (54.0 F)	22 of 100 (Routine)
Banjar(Saraj-Teh)	India	Record daily precipitation	25.4 mm (1.0 in)	21 of 100 (Routine)
Kynuna	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Dynevor Downs	Australia	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Kustanai	Kazakhstan	Record daily precipitation	16.6 mm (0.7 in)	20 of 100 (Routine)
McKinlay Roadhouse	Australia	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Carandotta Station	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Manuka	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Milroy	Australia	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Graaff Reinet	South Africa	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Llanrheidol Station	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Boulia Airport	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Welgelegen(Middlemnt	South Africa	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Aralskoe More	Kazakhstan	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Hanover (Pol)	South Africa	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Lady Frere (Tnk)	South Africa	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Steynsburg	South Africa	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Bunda Bunda	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Brewarrina Hospital	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Walgett (Euroka)	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Brakfontein	South Africa	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)

Counts by Type and Timescale

367 records

Records set or tied on 20 October 1939 by type: Highest daily maximum 112, Lowest daily maximum 6, Highest daily minimum 48, Lowest daily minimum 2, Heaviest daily rainfall 198, Heaviest daily snowfall 1.

Records on 20 October 1939 by type
Record type	Records
Highest daily maximum	112
Lowest daily maximum	6
Highest daily minimum	48
Lowest daily minimum	2
Heaviest daily rainfall	198
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 20 October 1939 by timescale: all-time 1, monthly 9, daily 357.

How Much Records Were Beaten By

298 broken records

Margins by which the 298 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 101.4. Ties are not counted.

Top 20 by Significance

20 October 1939

Top 20 records on 20 October 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 October 1939	Ayrshire Downs, AU	monthly rain	72.1 mm (2.8 in)	35.3 mm (1.4 in)	42 years	67 of 100 (Major)
20 October 1939	Maneroo, AU	daily rain	48.3 mm (1.9 in)	40.4 mm (1.6 in)	44 years	58 of 100 (Notable)
20 October 1939	Wellwood, ZA	daily rain	35.8 mm (1.4 in)	25.1 mm (1.0 in)	46 years	52 of 100 (Notable)
20 October 1939	Vryburg (Pol), ZA	daily rain	26.9 mm (1.1 in)	24.9 mm (1.0 in)	50 years	46 of 100 (Notable)
20 October 1939	Ft Pierce, US	daily rain	118.1 mm (4.6 in)	77.7 mm (3.1 in)	16 years	46 of 100 (Notable)
20 October 1939	Alamur(Alamar), IN	daily rain	154.7 mm (6.1 in)	101.4 mm (4.0 in)	22 years	45 of 100 (Notable)
20 October 1939	Canobie, AU	daily rain	26.7 mm (1.1 in)	26.7 mm (1.1 in)	42 years	43 of 100 (Notable)
20 October 1939	Bakensrug, ZA	daily rain	29.2 mm (1.1 in)	14.7 mm (0.6 in)	46 years	42 of 100 (Notable)
20 October 1939	Camooweal Township, AU	daily rain	31.8 mm (1.3 in)	28.0 mm (1.1 in)	4 years	41 of 100 (Notable)
20 October 1939	Winton Post Office, AU	daily rain	47.8 mm (1.9 in)	31.0 mm (1.2 in)	16 years	40 of 100 (Notable)
20 October 1939	Coorabulka, AU	monthly rain	52.8 mm (2.1 in)	20.8 mm (0.8 in)	22 years	40 of 100 (Notable)
20 October 1939	Kareekloof, ZA	daily rain	40.6 mm (1.6 in)	33.7 mm (1.3 in)	12 years	39 of 100 (Notable)
20 October 1939	Alur, IN	all-time rain	155.2 mm (6.1 in)	10.7 mm (0.4 in)	36 years	38 of 100 (Notable)
20 October 1939	Lorraine, AU	daily rain	32.3 mm (1.3 in)	32.3 mm (1.3 in)	29 years	37 of 100 (Notable)
20 October 1939	Millungera Station, AU	daily rain	40.6 mm (1.6 in)	36.5 mm (1.4 in)	14 years	37 of 100 (Notable)
20 October 1939	Barsi, IN	daily rain	55.4 mm (2.2 in)	35.6 mm (1.4 in)	21 years	37 of 100 (Notable)
20 October 1939	Cork Station, AU	monthly rain	50.8 mm (2.0 in)	11.9 mm (0.5 in)	22 years	36 of 100 (Notable)
20 October 1939	San Jacinto, US	daily high min	19.4 C (66.9 F)	6.6 C (11.9 F)	38 years	34 of 100 (Routine)
20 October 1939	Evesham Station, AU	daily rain	31.2 mm (1.2 in)	24.1 mm (0.9 in)	18 years	33 of 100 (Routine)
20 October 1939	Sonamarg &, IN	daily rain	50.3 mm (2.0 in)	31.8 mm (1.3 in)	9 years	33 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

1806 to 1939

Records set or tied on this calendar date in each year from 1806 to 1939. 1939 had 367 records.

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

Records on 10-20 in each year
Year	Records
1806	1
1835	1
1844	1
1846	1
1847	2
1851	1
1852	1
1858	1
1863	2
1864	2
1866	3
1867	1
1868	2
1872	2
1874	2
1875	3
1876	2
1877	1
1878	1
1880	3
1881	2
1884	1
1885	1
1886	1
1887	1
1888	6
1891	4
1892	4
1893	1
1894	3
1895	4
1896	9
1897	2
1898	7
1899	1
1900	8
1901	7
1902	5
1903	9
1904	13
1905	22
1906	28
1907	32
1908	26
1909	17
1910	31
1911	16
1912	6
1913	38
1914	16
1915	20
1916	72
1917	201
1918	34
1919	19
1920	81
1921	68
1922	83
1923	96
1924	182
1925	247
1926	147
1927	283
1928	92
1929	129
1930	672
1931	125
1932	331
1933	675
1934	422
1935	390
1936	370
1937	189
1938	231
1939	367
1940	757
1941	459
1942	152
1943	501
1944	288
1945	363
1946	310
1947	1,494
1948	320
1949	1,084
1950	619
1951	279
1952	520
1953	1,057
1954	262
1955	529
1956	283
1957	440
1958	461
1959	451
1960	671
1961	479
1962	733
1963	765
1964	598
1965	340
1966	857
1967	511
1968	244
1969	607
1970	710
1971	606
1972	1,724
1973	878
1974	1,122
1975	587
1976	1,304
1977	467
1978	508
1979	1,647
1980	350
1981	1,083
1982	1,191
1983	944
1984	1,562
1985	835
1986	823
1987	590
1988	737
1989	2,092
1990	609
1991	971
1992	1,174
1993	1,238
1994	650
1995	703
1996	1,417
1997	949
1998	683
1999	603
2000	737
2001	589
2002	985
2003	1,761
2004	1,861
2005	1,092
2006	1,170
2007	923
2008	477
2009	786
2010	539
2011	785
2012	945
2013	592
2014	851
2015	523
2016	947
2017	602
2018	394
2019	744
2020	1,010
2021	900
2022	834
2023	1,468
2024	707
2025	326

Download the Data

Data for records on 1939-10-20: 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 20	268
20 to 40	26
40 to 60	2
60 to 80	1
80 to 100	0
100 to 120	1