Weather Records on 21 October 1930

492 weather records were set or tied worldwide on 21 October 1930. Highest significance: Battleford, CA.

Key Facts for 21 October 1930

On 21 October 1930, 492 weather records were set or tied at long-record stations worldwide.
16 were record highs and 387 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 12 monthly and 480 daily.
Battleford set a daily record low minimum temperature of -17.8 C (0.0 F) on 21 October 1930.
Across 167 earlier years (1795 to 2025) the same calendar date averaged 419 records.

Record Map

492 stations

492 station records on 21 October 1930 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 October 1930: highest significance records shown on the map
Station	Country	Type	Value	Significance
Battleford	Canada	Record low minimum temperature	-17.8 C (0.0 F)	42 of 100 (Notable)
Prince Albert	Canada	Record low minimum temperature	-18.9 C (-2.0 F)	28 of 100 (Routine)
Kanmantoo	Australia	Record daily precipitation	30.5 mm (1.2 in)	26 of 100 (Routine)
Macksville 8 NNE	United States	Record low maximum temperature	1.7 C (35.1 F)	25 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record high minimum temperature	16.1 C (61.0 F)	24 of 100 (Routine)
Hutchinson River	United States	Record low maximum temperature	2.2 C (36.0 F)	24 of 100 (Routine)
Saskatoon Diefenbaker Int'l A	Canada	Record low minimum temperature	-14.4 C (6.1 F)	23 of 100 (Routine)
Hays 1 S	United States	Record low maximum temperature	0.6 C (33.1 F)	23 of 100 (Routine)
Winfield 3NE	United States	Record low maximum temperature	3.9 C (39.0 F)	23 of 100 (Routine)
Glendive	United States	Record low minimum temperature	-11.1 C (12.0 F)	23 of 100 (Routine)
Minneapolis	United States	Record low maximum temperature	1.1 C (34.0 F)	22 of 100 (Routine)
Jefferson 3SE	United States	Record low maximum temperature	6.1 C (43.0 F)	22 of 100 (Routine)
Medicine Lodge	United States	Record low maximum temperature	5.6 C (42.1 F)	21 of 100 (Routine)
Newton	United States	Record low maximum temperature	1.7 C (35.1 F)	21 of 100 (Routine)
Burra (Kooringa)	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Noorong	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Rosedale	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Roseworthy Agric College	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Gladstone	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Tarlee	Australia	Record daily precipitation	10.9 mm (0.4 in)	20 of 100 (Routine)
Litchfield	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Mount Bryan	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Burra (Worlds End)	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Freeling Railway	Australia	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Laen	Australia	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Lyrup	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Morgan Post Office	Australia	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Port Broughton	Australia	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Balaklava	Australia	Record daily precipitation	9.7 mm (0.38 in)	20 of 100 (Routine)
Wallaroo	Australia	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Stockport	Australia	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Wychitella South	Australia	Record daily precipitation	13.7 mm (0.5 in)	20 of 100 (Routine)
Ashland	United States	Record low maximum temperature	3.9 C (39.0 F)	20 of 100 (Routine)
Columbus	United States	Record low maximum temperature	5.0 C (41.0 F)	20 of 100 (Routine)
Emporia 1 S	United States	Record low maximum temperature	1.7 C (35.1 F)	20 of 100 (Routine)
Phillipsburg 1 SSE	United States	Record low maximum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Pratt 3NW	United States	Record low maximum temperature	3.3 C (37.9 F)	20 of 100 (Routine)
Great Falls	United States	Record low minimum temperature	-6.1 C (21.0 F)	20 of 100 (Routine)
Great Falls 16St	United States	Record low minimum temperature	-12.2 C (10.0 F)	20 of 100 (Routine)
Woodstock 2 NE	United States	Record low minimum temperature	-5.0 C (23.0 F)	20 of 100 (Routine)
Concordia ASOS	United States	Record low maximum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Gladstone (Booyoolee)	Australia	Record daily precipitation	16.0 mm (0.6 in)	19 of 100 (Routine)
Medicine Hat A	Canada	Record low minimum temperature	-9.4 C (15.1 F)	19 of 100 (Routine)
Colby	United States	Record low maximum temperature	0.6 C (33.1 F)	19 of 100 (Routine)
Norwich	United States	Record low maximum temperature	5.0 C (41.0 F)	19 of 100 (Routine)
Beaver City	United States	Record low maximum temperature	1.1 C (34.0 F)	19 of 100 (Routine)
Somerset Main Street	United States	Record low minimum temperature	-12.2 C (10.0 F)	19 of 100 (Routine)
Hoyleton	Australia	Record daily precipitation	8.1 mm (0.32 in)	18 of 100 (Routine)
Beetaloo Reservoir Old Site	Australia	Record daily precipitation	14.7 mm (0.6 in)	18 of 100 (Routine)
Kingston on Murray	Australia	Record daily precipitation	15.7 mm (0.6 in)	18 of 100 (Routine)
Mulgundawa Salt	Australia	Record daily precipitation	12.2 mm (0.5 in)	18 of 100 (Routine)
Victoria Sugar Mill	Australia	Record daily precipitation	12.7 mm (0.5 in)	18 of 100 (Routine)
Grenfell	Canada	Record low minimum temperature	-12.2 C (10.0 F)	18 of 100 (Routine)
Swift Current	Canada	Record low minimum temperature	-12.2 C (10.0 F)	18 of 100 (Routine)
Reit Im Winkl	Germany	Record daily precipitation	17.0 mm (0.7 in)	18 of 100 (Routine)
Burlington	United States	Record low maximum temperature	2.8 C (37.0 F)	18 of 100 (Routine)
Garden City	United States	Record low maximum temperature	1.1 C (34.0 F)	18 of 100 (Routine)
Lebo	United States	Record low maximum temperature	2.2 C (36.0 F)	18 of 100 (Routine)
Darlington	United States	Record low minimum temperature	-6.1 C (21.0 F)	18 of 100 (Routine)
Curtis	United States	Record low maximum temperature	2.8 C (37.0 F)	18 of 100 (Routine)

Counts by Type and Timescale

492 records

Records set or tied on 21 October 1930 by type: Highest daily maximum 3, Lowest daily maximum 155, Highest daily minimum 13, Lowest daily minimum 232, Heaviest daily rainfall 89.

Records on 21 October 1930 by type
Record type	Records
Highest daily maximum	3
Lowest daily maximum	155
Highest daily minimum	13
Lowest daily minimum	232
Heaviest daily rainfall	89
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 October 1930 by timescale: all-time 0, monthly 12, daily 480.

How Much Records Were Beaten By

388 broken records

Margins by which the 388 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 13.4. Ties are not counted.

Top 20 by Significance

21 October 1930

Top 20 records on 21 October 1930 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 October 1930	Battleford, CA	daily low min	-17.8 C (0.0 F)	11.1 C (20.0 F)	47 years	42 of 100 (Notable)
21 October 1930	Prince Albert, CA	daily low min	-18.9 C (-2.0 F)	6.1 C (11.0 F)	40 years	28 of 100 (Routine)
21 October 1930	Kanmantoo, AU	daily rain	30.5 mm (1.2 in)	6.1 mm (0.24 in)	39 years	26 of 100 (Routine)
21 October 1930	Macksville 8 NNE, US	daily low max	1.7 C (35.1 F)	10.0 C (18.0 F)	24 years	25 of 100 (Routine)
21 October 1930	Wagga Wagga (Kooringal), AU	daily high min	16.1 C (61.0 F)	1.1 C (2.0 F)	55 years	24 of 100 (Routine)
21 October 1930	Hutchinson River, US	daily low max	2.2 C (36.0 F)	10.6 C (19.1 F)	19 years	24 of 100 (Routine)
21 October 1930	Saskatoon Diefenbaker Int'l A, CA	daily low min	-14.4 C (6.1 F)	7.2 C (13.0 F)	16 years	23 of 100 (Routine)
21 October 1930	Hays 1 S, US	daily low max	0.6 C (33.1 F)	9.4 C (16.9 F)	24 years	23 of 100 (Routine)
21 October 1930	Winfield 3NE, US	daily low max	3.9 C (39.0 F)	7.2 C (13.0 F)	31 years	23 of 100 (Routine)
21 October 1930	Glendive, US	daily low min	-11.1 C (12.0 F)	5.5 C (9.9 F)	31 years	23 of 100 (Routine)
21 October 1930	Minneapolis, US	daily low max	1.1 C (34.0 F)	6.7 C (12.1 F)	31 years	22 of 100 (Routine)
21 October 1930	Jefferson 3SE, US	daily low max	6.1 C (43.0 F)	6.7 C (12.1 F)	31 years	22 of 100 (Routine)
21 October 1930	Medicine Lodge, US	daily low max	5.6 C (42.1 F)	6.1 C (11.0 F)	31 years	21 of 100 (Routine)
21 October 1930	Newton, US	daily low max	1.7 C (35.1 F)	6.1 C (11.0 F)	31 years	21 of 100 (Routine)
21 October 1930	Burra (Kooringa), AU	daily rain	16.0 mm (0.6 in)	9.9 mm (0.39 in)	39 years	20 of 100 (Routine)
21 October 1930	Noorong, AU	daily rain	18.0 mm (0.7 in)	11.6 mm (0.5 in)	49 years	20 of 100 (Routine)
21 October 1930	Rosedale, AU	daily rain	18.0 mm (0.7 in)	13.4 mm (0.5 in)	12 years	20 of 100 (Routine)
21 October 1930	Roseworthy Agric College, AU	daily rain	18.8 mm (0.7 in)	9.4 mm (0.37 in)	39 years	20 of 100 (Routine)
21 October 1930	Gladstone, AU	daily rain	15.2 mm (0.6 in)	7.6 mm (0.30 in)	39 years	20 of 100 (Routine)
21 October 1930	Tarlee, AU	daily rain	10.9 mm (0.4 in)	5.8 mm (0.23 in)	45 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 1930

Records set or tied on this calendar date in each year from 1795 to 1930. 1930 had 492 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 1930-10-21: 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 2	214
2 to 4	103
4 to 6	28
6 to 8	28
8 to 10	9
10 to 12	5
12 to 14	1