Weather Records on 4 October 1940

220 weather records were set or tied worldwide on 4 October 1940. Highest significance: Savage, US.

Key Facts for 4 October 1940

On 4 October 1940, 220 weather records were set or tied at long-record stations worldwide.
104 were record highs and 31 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 22 monthly and 198 daily.
Savage set a monthly record daily precipitation of 50.8 mm (2.0 in) on 4 October 1940.
Across 160 earlier years (1795 to 2026) the same calendar date averaged 466 records.

Record Map

220 stations

220 station records on 4 October 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 October 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Savage	United States	Record daily precipitation	50.8 mm (2.0 in)	47 of 100 (Notable)
Grove Farm 1021	United States	Record daily precipitation	71.1 mm (2.8 in)	47 of 100 (Notable)
Dauphin	Canada	Record daily precipitation	29.5 mm (1.2 in)	46 of 100 (Notable)
Kukuiula 935	United States	Record daily precipitation	45.2 mm (1.8 in)	44 of 100 (Notable)
Lihue 1020	United States	Record daily precipitation	61.2 mm (2.4 in)	40 of 100 (Notable)
Mildred	United States	Record daily precipitation	38.1 mm (1.5 in)	37 of 100 (Notable)
Yerevan	Armenia	Record high minimum temperature	15.9 C (60.6 F)	36 of 100 (Notable)
Gumri	Armenia	Record high minimum temperature	12.9 C (55.2 F)	33 of 100 (Routine)
Beach	United States	Record daily precipitation	39.9 mm (1.6 in)	32 of 100 (Routine)
E Lawai 934	United States	Record daily precipitation	45.2 mm (1.8 in)	31 of 100 (Routine)
Dickinson Exp STN	United States	Record daily precipitation	27.9 mm (1.1 in)	30 of 100 (Routine)
Makaweli 965	United States	Record daily precipitation	25.7 mm (1.0 in)	28 of 100 (Routine)
Saint Johns	United States	Record high minimum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Graz	Austria	Record daily precipitation	55.6 mm (2.2 in)	24 of 100 (Routine)
Hubbard	Canada	Record daily precipitation	25.4 mm (1.0 in)	24 of 100 (Routine)
Chattanooga	United States	Record high minimum temperature	26.1 C (79.0 F)	24 of 100 (Routine)
Hilo 86A	United States	Record daily precipitation	65.5 mm (2.6 in)	23 of 100 (Routine)
Snowflake	United States	Record high minimum temperature	11.1 C (52.0 F)	21 of 100 (Routine)
Regina Int'l A	Canada	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Aktobe	Kazakhstan	Record daily precipitation	19.7 mm (0.8 in)	20 of 100 (Routine)
Lovell	United States	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Grenfell	Canada	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Malmesbury	South Africa	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Baku	Azerbaijan	Record daily precipitation	14.6 mm (0.6 in)	20 of 100 (Routine)
Steinkopf (Pol)	South Africa	Record daily precipitation	0.5 mm (0.02 in)	20 of 100 (Routine)
Beringarra	Australia	Record daily precipitation	3.8 mm (0.15 in)	20 of 100 (Routine)
Gronbaek-Allingskovgard	Denmark	Record daily precipitation	17.1 mm (0.7 in)	20 of 100 (Routine)
Mnt Fletcher (Tnk)	South Africa	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Sheo	India	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Przhevalsk	Kyrgyzstan	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Olekminsk	Russia	Record daily precipitation	7.2 mm (0.28 in)	20 of 100 (Routine)
Elsenburg	South Africa	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Flandreau	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Kilauea 1134	United States	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Mileura	Australia	Record daily precipitation	4.3 mm (0.17 in)	20 of 100 (Routine)
Humboldt	Canada	Record high minimum temperature	7.8 C (46.0 F)	20 of 100 (Routine)
Coimbra	Portugal	Record low minimum temperature	7.0 C (44.6 F)	20 of 100 (Routine)
Robben Island (Vrt)	South Africa	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Jagersfontein	South Africa	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Rosalia	United States	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Honomanu 450	United States	Record high minimum temperature	21.1 C (70.0 F)	20 of 100 (Routine)
Koloa 936	United States	Record daily precipitation	33.0 mm (1.3 in)	20 of 100 (Routine)
Williams	United States	Record daily precipitation	51.8 mm (2.0 in)	19 of 100 (Routine)
Collbran	United States	Record low minimum temperature	-3.9 C (25.0 F)	19 of 100 (Routine)
Fernandina Beach	United States	Record low minimum temperature	14.4 C (57.9 F)	19 of 100 (Routine)
Culbertson	United States	Record daily precipitation	23.4 mm (0.9 in)	19 of 100 (Routine)
Yuma Wb City	United States	Record daily precipitation	9.4 mm (0.37 in)	19 of 100 (Routine)
Burketown Post Office	Australia	Record low minimum temperature	13.3 C (55.9 F)	18 of 100 (Routine)
Tbilisi	Georgia	Record high minimum temperature	18.1 C (64.6 F)	18 of 100 (Routine)
Prescott	United States	Record daily precipitation	31.2 mm (1.2 in)	18 of 100 (Routine)
Centerville	United States	Record daily precipitation	25.7 mm (1.0 in)	18 of 100 (Routine)
Indianola 1SW	United States	Record daily precipitation	22.4 mm (0.9 in)	18 of 100 (Routine)
Nebraska City 1 NW	United States	Record high minimum temperature	20.6 C (69.1 F)	18 of 100 (Routine)
Sundance	United States	Record daily precipitation	20.8 mm (0.8 in)	18 of 100 (Routine)
Kealia 1112	United States	Record daily precipitation	35.8 mm (1.4 in)	18 of 100 (Routine)
Dauphin	Canada	Record high minimum temperature	12.2 C (54.0 F)	17 of 100 (Routine)
Kislovodsk	Russia	Record daily precipitation	10.8 mm (0.4 in)	17 of 100 (Routine)
Tortosa - Observatorio del Ebr	Spain	Record low minimum temperature	7.2 C (45.0 F)	17 of 100 (Routine)
Walnut Grove	United States	Record daily precipitation	7.9 mm (0.31 in)	17 of 100 (Routine)
Carson City	United States	Record low maximum temperature	12.8 C (55.0 F)	17 of 100 (Routine)

Counts by Type and Timescale

220 records

Records set or tied on 4 October 1940 by type: Highest daily maximum 4, Lowest daily maximum 10, Highest daily minimum 100, Lowest daily minimum 21, Heaviest daily rainfall 85.

Records on 4 October 1940 by type
Record type	Records
Highest daily maximum	4
Lowest daily maximum	10
Highest daily minimum	100
Lowest daily minimum	21
Heaviest daily rainfall	85
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 4 October 1940 by timescale: all-time 0, monthly 22, daily 198.

How Much Records Were Beaten By

164 broken records

Margins by which the 164 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 58.4. Ties are not counted.

Top 20 by Significance

4 October 1940

Top 20 records on 4 October 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 October 1940	Savage, US	monthly rain	50.8 mm (2.0 in)	19.3 mm (0.8 in)	19 years	47 of 100 (Notable)
4 October 1940	Grove Farm 1021, US	daily rain	71.1 mm (2.8 in)	58.4 mm (2.3 in)	15 years	47 of 100 (Notable)
4 October 1940	Dauphin, CA	daily rain	29.5 mm (1.2 in)	25.9 mm (1.0 in)	6 years	46 of 100 (Notable)
4 October 1940	Kukuiula 935, US	daily rain	45.2 mm (1.8 in)	39.9 mm (1.6 in)	4 years	44 of 100 (Notable)
4 October 1940	Lihue 1020, US	daily rain	61.2 mm (2.4 in)	42.9 mm (1.7 in)	15 years	40 of 100 (Notable)
4 October 1940	Mildred, US	monthly rain	38.1 mm (1.5 in)	8.4 mm (0.33 in)	27 years	37 of 100 (Notable)
4 October 1940	Yerevan, AM	monthly high min	15.9 C (60.6 F)	1.9 C (3.4 F)	51 years	36 of 100 (Notable)
4 October 1940	Gumri, AM	monthly high min	12.9 C (55.2 F)	2.7 C (4.9 F)	42 years	33 of 100 (Routine)
4 October 1940	Beach, US	monthly rain	39.9 mm (1.6 in)	6.9 mm (0.27 in)	27 years	32 of 100 (Routine)
4 October 1940	E Lawai 934, US	daily rain	45.2 mm (1.8 in)	27.2 mm (1.1 in)	11 years	31 of 100 (Routine)
4 October 1940	Dickinson Exp STN, US	daily rain	27.9 mm (1.1 in)	13.7 mm (0.5 in)	16 years	30 of 100 (Routine)
4 October 1940	Makaweli 965, US	daily rain	25.7 mm (1.0 in)	22.4 mm (0.9 in)	19 years	28 of 100 (Routine)
4 October 1940	Saint Johns, US	monthly high min	13.3 C (55.9 F)	0.5 C (0.9 F)	35 years	25 of 100 (Routine)
4 October 1940	Graz, AT	monthly rain	55.6 mm (2.2 in)	3.2 mm (0.13 in)	25 years	24 of 100 (Routine)
4 October 1940	Hubbard, CA	daily rain	25.4 mm (1.0 in)	10.2 mm (0.4 in)	24 years	24 of 100 (Routine)
4 October 1940	Chattanooga, US	monthly high min	26.1 C (79.0 F)	1.7 C (3.1 F)	28 years	24 of 100 (Routine)
4 October 1940	Hilo 86A, US	daily rain	65.5 mm (2.6 in)	31.0 mm (1.2 in)	10 years	23 of 100 (Routine)
4 October 1940	Snowflake, US	daily high min	11.1 C (52.0 F)	2.2 C (4.0 F)	40 years	21 of 100 (Routine)
4 October 1940	Regina Int'l A, CA	daily rain	23.6 mm (0.9 in)	10.4 mm (0.4 in)	16 years	20 of 100 (Routine)
4 October 1940	Aktobe, KZ	monthly rain	19.7 mm (0.8 in)	4.9 mm (0.19 in)	5 years	20 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 1940

Records set or tied on this calendar date in each year from 1795 to 1940. 1940 had 220 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 1940-10-04: 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 10	147
10 to 20	10
20 to 30	3
30 to 40	2
40 to 50	1
50 to 60	1