Weather Records on 21 October 1940

537 weather records were set or tied worldwide on 21 October 1940. Highest significance: Papaikou 144.1, US.

Key Facts for 21 October 1940

On 21 October 1940, 537 weather records were set or tied at long-record stations worldwide.
244 were record highs and 169 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 6 monthly and 531 daily.
Papaikou 144.1 set a daily record precipitation of 157.5 mm (6.2 in) on 21 October 1940.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 419 records.

Record Map

537 stations

537 station records on 21 October 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Papaikou 144.1	United States	Record daily precipitation	157.5 mm (6.2 in)	52 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	151.9 mm (6.0 in)	50 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record daily precipitation	80.4 mm (3.2 in)	49 of 100 (Notable)
Moncton	Canada	Record daily snowfall	15.2 cm (6.0 in)	41 of 100 (Notable)
Jaipur	India	Record daily precipitation	87.9 mm (3.5 in)	34 of 100 (Routine)
Ghazipur	India	Record daily precipitation	54.9 mm (2.2 in)	34 of 100 (Routine)
Navapur	India	Record daily precipitation	55.9 mm (2.2 in)	33 of 100 (Routine)
Badarpur	India	Record daily precipitation	84.3 mm (3.3 in)	32 of 100 (Routine)
Chatham	Canada	Record low minimum temperature	-8.9 C (16.0 F)	30 of 100 (Routine)
Satna	India	Record daily precipitation	36.8 mm (1.4 in)	30 of 100 (Routine)
Stockton 2	United States	Record high minimum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Brockville	Canada	Record low maximum temperature	1.7 C (35.1 F)	29 of 100 (Routine)
Simcoe	Canada	Record low minimum temperature	-5.0 C (23.0 F)	29 of 100 (Routine)
Basudevpur (Eram)	India	Record daily precipitation	119.9 mm (4.7 in)	29 of 100 (Routine)
Charlottetown Cda	Canada	Record daily snowfall	12.7 cm (5.0 in)	28 of 100 (Routine)
Lanka	India	Record daily precipitation	78.7 mm (3.1 in)	27 of 100 (Routine)
Turigaria (Kaira)	India	Record daily precipitation	81.3 mm (3.2 in)	27 of 100 (Routine)
Niulii 179	United States	Record daily precipitation	45.0 mm (1.8 in)	27 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	3.3 C (37.9 F)	26 of 100 (Routine)
Ahwa	India	Record daily precipitation	50.8 mm (2.0 in)	26 of 100 (Routine)
Cortland	United States	Record low maximum temperature	-1.1 C (30.0 F)	26 of 100 (Routine)
Parrsboro	Canada	Record daily snowfall	7.6 cm (3.0 in)	25 of 100 (Routine)
Somerville 4 NW	United States	Record low maximum temperature	7.2 C (45.0 F)	25 of 100 (Routine)
Carlisle	United States	Record low maximum temperature	7.2 C (45.0 F)	25 of 100 (Routine)
Mt Pocono 2 N	United States	Record low maximum temperature	-1.1 C (30.0 F)	25 of 100 (Routine)
Haiku 490	United States	Record low minimum temperature	15.6 C (60.1 F)	25 of 100 (Routine)
Bonshaw (Campbell St)	Australia	Record daily precipitation	27.9 mm (1.1 in)	24 of 100 (Routine)
Sadiya India	India	Record daily precipitation	50.8 mm (2.0 in)	24 of 100 (Routine)
Ilav	India	Record daily precipitation	38.1 mm (1.5 in)	24 of 100 (Routine)
Dinokana	South Africa	Record daily precipitation	32.3 mm (1.3 in)	24 of 100 (Routine)
Mtn View 91	United States	Record daily precipitation	79.5 mm (3.1 in)	24 of 100 (Routine)
Brockville	Canada	Record low minimum temperature	-11.1 C (12.0 F)	23 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	1.7 C (35.1 F)	23 of 100 (Routine)
Seoni	India	Record daily precipitation	32.3 mm (1.3 in)	23 of 100 (Routine)
W Pt	United States	Record low maximum temperature	6.7 C (44.1 F)	23 of 100 (Routine)
Emporia 1 S	United States	Record high maximum temperature	32.8 C (91.0 F)	22 of 100 (Routine)
Houlton	United States	Record low minimum temperature	-8.9 C (16.0 F)	22 of 100 (Routine)
York	United States	Record high maximum temperature	32.8 C (91.0 F)	22 of 100 (Routine)
Lebanon 3 W	United States	Record low maximum temperature	7.2 C (45.0 F)	22 of 100 (Routine)
Grenfell	Canada	Record high maximum temperature	24.4 C (75.9 F)	21 of 100 (Routine)
Haliburton A	Canada	Record low maximum temperature	0.6 C (33.1 F)	21 of 100 (Routine)
Akhuapada	India	Record daily precipitation	61.0 mm (2.4 in)	21 of 100 (Routine)
Diamond Harbour	India	Record daily precipitation	45.0 mm (1.8 in)	21 of 100 (Routine)
Santa Barbara	United States	Record high minimum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
Soldier Creek Adm Site	United States	Record high minimum temperature	7.2 C (45.0 F)	21 of 100 (Routine)
Austin #2	United States	Record high minimum temperature	8.3 C (46.9 F)	21 of 100 (Routine)
Ogdensburg 4 NE	United States	Record low maximum temperature	2.2 C (36.0 F)	21 of 100 (Routine)
Williamsport	United States	Record low maximum temperature	6.1 C (43.0 F)	21 of 100 (Routine)
Olaa 92	United States	Record daily precipitation	71.1 mm (2.8 in)	21 of 100 (Routine)
Port Townsend	United States	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Concord	United States	Record daily snowfall	1.3 cm (0.5 in)	20 of 100 (Routine)
Digby	Canada	Record daily snowfall	1.3 cm (0.5 in)	20 of 100 (Routine)
Sunnyside	United States	Record daily precipitation	9.1 mm (0.36 in)	20 of 100 (Routine)
Point Escuminac	Canada	Record daily snowfall	3.8 cm (1.5 in)	20 of 100 (Routine)
Dug (Dag)	India	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Blythwood	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Astrakan	Russia	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Yarmouth	Canada	Record daily snowfall	4.6 cm (1.8 in)	20 of 100 (Routine)
Kalamunda	Australia	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Howrah	India	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)

Counts by Type and Timescale

537 records

Records set or tied on 21 October 1940 by type: Highest daily maximum 154, Lowest daily maximum 95, Highest daily minimum 90, Lowest daily minimum 74, Heaviest daily rainfall 111, Heaviest daily snowfall 13.

Records on 21 October 1940 by type
Record type	Records
Highest daily maximum	154
Lowest daily maximum	95
Highest daily minimum	90
Lowest daily minimum	74
Heaviest daily rainfall	111
Heaviest daily snowfall	13
Deepest snow cover	0

Records on 21 October 1940 by timescale: all-time 0, monthly 6, daily 531.

How Much Records Were Beaten By

431 broken records

Margins by which the 431 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 119.4. Ties are not counted.

Top 20 by Significance

21 October 1940

Top 20 records on 21 October 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1940	Papaikou 144.1, US	daily rain	157.5 mm (6.2 in)	78.3 mm (3.1 in)	32 years	52 of 100 (Notable)
21 October 1940	Honohina 137, US	daily rain	151.9 mm (6.0 in)	119.4 mm (4.7 in)	25 years	50 of 100 (Notable)
21 October 1940	Tortosa - Observatorio del Ebr, ES	daily rain	80.4 mm (3.2 in)	50.8 mm (2.0 in)	22 years	49 of 100 (Notable)
21 October 1940	Moncton, CA	monthly snowfall	15.2 cm (6.0 in)	4.3 cm (1.7 in)	59 years	41 of 100 (Notable)
21 October 1940	Jaipur, IN	daily rain	87.9 mm (3.5 in)	52.6 mm (2.1 in)	12 years	34 of 100 (Routine)
21 October 1940	Ghazipur, IN	daily rain	54.9 mm (2.2 in)	45.0 mm (1.8 in)	38 years	34 of 100 (Routine)
21 October 1940	Navapur, IN	daily rain	55.9 mm (2.2 in)	54.1 mm (2.1 in)	7 years	33 of 100 (Routine)
21 October 1940	Badarpur, IN	daily rain	84.3 mm (3.3 in)	60.2 mm (2.4 in)	14 years	32 of 100 (Routine)
21 October 1940	Chatham, CA	daily low min	-8.9 C (16.0 F)	2.8 C (5.0 F)	62 years	30 of 100 (Routine)
21 October 1940	Satna, IN	daily rain	36.8 mm (1.4 in)	27.4 mm (1.1 in)	24 years	30 of 100 (Routine)
21 October 1940	Stockton 2, US	daily high min	16.1 C (61.0 F)	3.9 C (7.0 F)	42 years	30 of 100 (Routine)
21 October 1940	Brockville, CA	daily low max	1.7 C (35.1 F)	2.7 C (4.9 F)	62 years	29 of 100 (Routine)
21 October 1940	Simcoe, CA	daily low min	-5.0 C (23.0 F)	1.1 C (2.0 F)	67 years	29 of 100 (Routine)
21 October 1940	Basudevpur (Eram), IN	daily rain	119.9 mm (4.7 in)	58.9 mm (2.3 in)	12 years	29 of 100 (Routine)
21 October 1940	Charlottetown Cda, CA	monthly snowfall	12.7 cm (5.0 in)	7.6 cm (3.0 in)	3 years	28 of 100 (Routine)
21 October 1940	Lanka, IN	daily rain	78.7 mm (3.1 in)	45.2 mm (1.8 in)	8 years	27 of 100 (Routine)
21 October 1940	Turigaria (Kaira), IN	daily rain	81.3 mm (3.2 in)	55.9 mm (2.2 in)	1 year	27 of 100 (Routine)
21 October 1940	Niulii 179, US	daily rain	45.0 mm (1.8 in)	13.0 mm (0.5 in)	25 years	27 of 100 (Routine)
21 October 1940	Lakefield, CA	daily low max	3.3 C (37.9 F)	2.3 C (4.1 F)	56 years	26 of 100 (Routine)
21 October 1940	Ahwa, IN	daily rain	50.8 mm (2.0 in)	37.6 mm (1.5 in)	8 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

1795 to 1940

Records set or tied on this calendar date in each year from 1795 to 1940. 1940 had 537 records.

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

Records on 10-21 in each year
Year	Records
1795	1
1802	2
1805	1
1808	1
1810	1
1834	1
1835	1
1840	1
1845	1
1847	1
1850	1
1851	2
1854	1
1859	1
1863	1
1864	1
1866	3
1867	1
1868	3
1869	2
1871	1
1872	1
1873	1
1874	1
1876	4
1877	2
1878	1
1880	3
1881	1
1883	1
1886	1
1888	2
1889	2
1890	3
1891	6
1892	6
1893	1
1894	1
1895	2
1896	5
1898	6
1899	3
1900	2
1901	9
1902	2
1903	3
1904	30
1905	15
1906	11
1907	35
1908	35
1909	19
1910	21
1911	10
1912	18
1913	59
1914	35
1915	43
1916	70
1917	208
1918	18
1919	102
1920	149
1921	58
1922	78
1923	81
1924	389
1925	150
1926	77
1927	187
1928	78
1929	200
1930	492
1931	217
1932	165
1933	733
1934	407
1935	707
1936	407
1937	132
1938	121
1939	491
1940	537
1941	644
1942	258
1943	421
1944	367
1945	538
1946	297
1947	977
1948	266
1949	1,015
1950	438
1951	382
1952	848
1953	1,579
1954	279
1955	481
1956	276
1957	511
1958	322
1959	410
1960	408
1961	553
1962	359
1963	725
1964	457
1965	465
1966	425
1967	472
1968	174
1969	881
1970	548
1971	498
1972	813
1973	464
1974	866
1975	509
1976	1,467
1977	451
1978	616
1979	1,958
1980	378
1981	667
1982	870
1983	786
1984	1,872
1985	776
1986	814
1987	852
1988	696
1989	1,668
1990	807
1991	877
1992	1,095
1993	845
1994	670
1995	1,120
1996	1,581
1997	915
1998	711
1999	688
2000	771
2001	610
2002	1,241
2003	2,066
2004	1,674
2005	949
2006	1,057
2007	916
2008	610
2009	713
2010	710
2011	662
2012	703
2013	440
2014	716
2015	493
2016	734
2017	750
2018	440
2019	757
2020	1,135
2021	574
2022	629
2023	890
2024	1,138
2025	364

Download the Data

Data for records on 1940-10-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 20	399
20 to 40	17
40 to 60	11
60 to 80	3
80 to 100	0
100 to 120	1