Weather Records on 21 May 1925

250 weather records were set or tied worldwide on 21 May 1925. Highest significance: Astrakan, RU.

Key Facts for 21 May 1925

On 21 May 1925, 250 weather records were set or tied at long-record stations worldwide.
209 were record highs and 6 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 241 daily.
Astrakan set a daily record precipitation of 31.1 mm (1.2 in) on 21 May 1925.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

250 stations

250 station records on 21 May 1925 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1925: highest significance records shown on the map
Station	Country	Type	Value	Significance
Astrakan	Russia	Record daily precipitation	31.1 mm (1.2 in)	51 of 100 (Notable)
Spokane Intl AP	United States	Record daily precipitation	36.1 mm (1.4 in)	50 of 100 (Notable)
Weston 2 SE	United States	Record daily precipitation	53.3 mm (2.1 in)	49 of 100 (Notable)
Rosalia	United States	Record daily precipitation	33.3 mm (1.3 in)	44 of 100 (Notable)
Elatma	Russia	Record daily precipitation	43.2 mm (1.7 in)	27 of 100 (Routine)
Medicine Hat A	Canada	Record high minimum temperature	20.0 C (68.0 F)	26 of 100 (Routine)
Porthill	United States	Record daily precipitation	39.4 mm (1.6 in)	23 of 100 (Routine)
Glendive	United States	Record high minimum temperature	18.3 C (64.9 F)	23 of 100 (Routine)
Audubon	United States	Record high maximum temperature	35.0 C (95.0 F)	22 of 100 (Routine)
Kennebec	United States	Record high maximum temperature	37.2 C (99.0 F)	22 of 100 (Routine)
Edmonton	Canada	Record high minimum temperature	14.4 C (57.9 F)	21 of 100 (Routine)
Great Falls 16St	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Huron Rgnl AP	United States	Record high maximum temperature	33.9 C (93.0 F)	21 of 100 (Routine)
Moxee	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Maitland (Woodburlie)	Australia	Record daily precipitation	13.2 mm (0.5 in)	20 of 100 (Routine)
Feodosiia	Ukraine	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Mount Wedge	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Hallett	Australia	Record daily precipitation	11.9 mm (0.5 in)	20 of 100 (Routine)
Corny Point	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Swift Current	Canada	Record high maximum temperature	30.6 C (87.1 F)	20 of 100 (Routine)
Swift Current	Canada	Record high minimum temperature	16.7 C (62.1 F)	20 of 100 (Routine)
Atlantic 1 NE	United States	Record high maximum temperature	35.6 C (96.1 F)	20 of 100 (Routine)
Hay Springs	United States	Record high maximum temperature	35.6 C (96.1 F)	20 of 100 (Routine)
Havre Wb City	United States	Record high minimum temperature	13.9 C (57.0 F)	20 of 100 (Routine)
Shenkursk	Russia	Record daily precipitation	7.5 mm (0.30 in)	19 of 100 (Routine)
Forestburg 4 NNE	United States	Record high maximum temperature	40.0 C (104.0 F)	19 of 100 (Routine)
Indian Head Cda	Canada	Record high maximum temperature	33.3 C (91.9 F)	18 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	31.7 C (89.1 F)	18 of 100 (Routine)
Glendive	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Jefferson 3SE	United States	Record high maximum temperature	39.4 C (102.9 F)	18 of 100 (Routine)
Lusk 2 SW	United States	Record high maximum temperature	31.7 C (89.1 F)	18 of 100 (Routine)
Dilkara (Florieton)	Australia	Record daily precipitation	8.1 mm (0.32 in)	17 of 100 (Routine)
Qu'appelle	Canada	Record high minimum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Hollister 1 SW	United States	Record high minimum temperature	12.8 C (55.0 F)	17 of 100 (Routine)
Imperial	United States	Record high minimum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Camp Crook	United States	Record high maximum temperature	33.9 C (93.0 F)	17 of 100 (Routine)
Moonaree	Australia	Record daily precipitation	7.6 mm (0.30 in)	16 of 100 (Routine)
Cowell	Australia	Record daily precipitation	6.1 mm (0.24 in)	16 of 100 (Routine)
Mannum Council Depot	Australia	Record daily precipitation	5.8 mm (0.23 in)	16 of 100 (Routine)
Banff	Canada	Record high minimum temperature	7.8 C (46.0 F)	16 of 100 (Routine)
Chaplin	Canada	Record high maximum temperature	33.3 C (91.9 F)	16 of 100 (Routine)
Las Animas	United States	Record high maximum temperature	38.3 C (100.9 F)	16 of 100 (Routine)
Los Lunas	United States	Record high maximum temperature	35.6 C (96.1 F)	16 of 100 (Routine)
Dickinson Exp STN	United States	Record high maximum temperature	35.0 C (95.0 F)	16 of 100 (Routine)
Arapaho	United States	Record high maximum temperature	37.2 C (99.0 F)	16 of 100 (Routine)
Concordia ASOS	United States	Record high maximum temperature	33.9 C (93.0 F)	16 of 100 (Routine)
El Paso	United States	Record high minimum temperature	21.1 C (70.0 F)	16 of 100 (Routine)
Scottsbluff W B Heilig Fld AP	United States	Record high maximum temperature	36.1 C (97.0 F)	16 of 100 (Routine)
Williston Sloulin Fld	United States	Record high maximum temperature	34.4 C (93.9 F)	16 of 100 (Routine)
Kadina	Australia	Record daily precipitation	11.9 mm (0.5 in)	15 of 100 (Routine)
Moose Jaw Chab	Canada	Record high minimum temperature	13.9 C (57.0 F)	15 of 100 (Routine)
Ukiah	United States	Record high minimum temperature	11.7 C (53.1 F)	15 of 100 (Routine)
Carlinville	United States	Record high maximum temperature	35.6 C (96.1 F)	15 of 100 (Routine)
Alta	United States	Record high maximum temperature	32.2 C (90.0 F)	15 of 100 (Routine)
Burlington	United States	Record high maximum temperature	33.3 C (91.9 F)	15 of 100 (Routine)
Minden	United States	Record high maximum temperature	35.0 C (95.0 F)	15 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high maximum temperature	29.4 C (84.9 F)	15 of 100 (Routine)
Poplar 2 E	United States	Record high maximum temperature	35.0 C (95.0 F)	15 of 100 (Routine)
Willow City	United States	Record high maximum temperature	32.8 C (91.0 F)	15 of 100 (Routine)
El Paso	United States	Record high maximum temperature	36.1 C (97.0 F)	15 of 100 (Routine)

Counts by Type and Timescale

250 records

Records set or tied on 21 May 1925 by type: Highest daily maximum 149, Highest daily minimum 60, Lowest daily minimum 6, Heaviest daily rainfall 35.

Records on 21 May 1925 by type
Record type	Records
Highest daily maximum	149
Lowest daily maximum	0
Highest daily minimum	60
Lowest daily minimum	6
Heaviest daily rainfall	35
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 1925 by timescale: all-time 0, monthly 9, daily 241.

How Much Records Were Beaten By

209 broken records

Margins by which the 209 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.5. Ties are not counted.

Top 20 by Significance

21 May 1925

Top 20 records on 21 May 1925 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1925	Astrakan, RU	daily rain	31.1 mm (1.2 in)	21.7 mm (0.9 in)	24 years	51 of 100 (Notable)
21 May 1925	Spokane Intl AP, US	daily rain	36.1 mm (1.4 in)	28.5 mm (1.1 in)	24 years	50 of 100 (Notable)
21 May 1925	Weston 2 SE, US	daily rain	53.3 mm (2.1 in)	49.5 mm (1.9 in)	23 years	49 of 100 (Notable)
21 May 1925	Rosalia, US	daily rain	33.3 mm (1.3 in)	23.9 mm (0.9 in)	4 years	44 of 100 (Notable)
21 May 1925	Elatma, RU	monthly rain	43.2 mm (1.7 in)	3.4 mm (0.13 in)	27 years	27 of 100 (Routine)
21 May 1925	Medicine Hat A, CA	monthly high min	20.0 C (68.0 F)	0.6 C (1.1 F)	38 years	26 of 100 (Routine)
21 May 1925	Porthill, US	monthly rain	39.4 mm (1.6 in)	1.3 mm (0.05 in)	26 years	23 of 100 (Routine)
21 May 1925	Glendive, US	daily high min	18.3 C (64.9 F)	5.0 C (9.0 F)	30 years	23 of 100 (Routine)
21 May 1925	Audubon, US	monthly high max	35.0 C (95.0 F)	0.6 C (1.1 F)	29 years	22 of 100 (Routine)
21 May 1925	Kennebec, US	daily high max	37.2 C (99.0 F)	6.6 C (11.9 F)	31 years	22 of 100 (Routine)
21 May 1925	Edmonton, CA	daily high min	14.4 C (57.9 F)	3.3 C (5.9 F)	32 years	21 of 100 (Routine)
21 May 1925	Great Falls 16St, US	daily high min	17.2 C (63.0 F)	6.6 C (11.9 F)	6 years	21 of 100 (Routine)
21 May 1925	Huron Rgnl AP, US	daily high max	33.9 C (93.0 F)	3.9 C (7.0 F)	39 years	21 of 100 (Routine)
21 May 1925	Moxee, US	daily rain	11.2 mm (0.4 in)	5.9 mm (0.23 in)	26 years	20 of 100 (Routine)
21 May 1925	Maitland (Woodburlie), AU	daily rain	13.2 mm (0.5 in)	7.9 mm (0.31 in)	31 years	20 of 100 (Routine)
21 May 1925	Feodosiia, UA	daily rain	10.7 mm (0.4 in)	7.5 mm (0.30 in)	15 years	20 of 100 (Routine)
21 May 1925	Mount Wedge, AU	daily rain	11.4 mm (0.4 in)	6.1 mm (0.24 in)	35 years	20 of 100 (Routine)
21 May 1925	Hallett, AU	daily rain	11.9 mm (0.5 in)	5.5 mm (0.22 in)	28 years	20 of 100 (Routine)
21 May 1925	Corny Point, AU	daily rain	14.7 mm (0.6 in)	6.8 mm (0.27 in)	22 years	20 of 100 (Routine)
21 May 1925	Swift Current, CA	daily high max	30.6 C (87.1 F)	4.5 C (8.1 F)	30 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

1793 to 1925

Records set or tied on this calendar date in each year from 1793 to 1925. 1925 had 250 records.

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

Records on 05-21 in each year
Year	Records
1793	1
1795	1
1811	1
1837	2
1842	1
1847	2
1854	1
1857	1
1858	1
1865	1
1866	1
1870	2
1875	1
1876	1
1880	2
1882	1
1885	1
1886	2
1887	3
1889	5
1890	3
1891	6
1892	1
1893	1
1894	4
1895	4
1896	5
1897	2
1898	1
1899	5
1900	1
1901	3
1902	4
1903	26
1904	8
1905	7
1906	12
1907	36
1908	13
1909	13
1910	14
1911	87
1912	24
1913	13
1914	26
1915	24
1916	13
1917	76
1918	51
1919	170
1920	39
1921	158
1922	39
1923	125
1924	148
1925	250
1926	221
1927	207
1928	173
1929	247
1930	133
1931	488
1932	343
1933	290
1934	590
1935	190
1936	328
1937	227
1938	348
1939	355
1940	456
1941	525
1942	482
1943	463
1944	310
1945	515
1946	324
1947	485
1948	312
1949	593
1950	403
1951	271
1952	385
1953	501
1954	961
1955	507
1956	409
1957	709
1958	511
1959	684
1960	615
1961	306
1962	553
1963	598
1964	788
1965	238
1966	296
1967	1,022
1968	549
1969	832
1970	449
1971	536
1972	557
1973	493
1974	847
1975	1,160
1976	393
1977	756
1978	575
1979	787
1980	857
1981	1,550
1982	599
1983	1,106
1984	950
1985	610
1986	908
1987	1,242
1988	819
1989	671
1990	947
1991	1,065
1992	1,143
1993	1,197
1994	656
1995	749
1996	1,461
1997	953
1998	1,200
1999	544
2000	897
2001	1,187
2002	2,048
2003	807
2004	898
2005	1,020
2006	810
2007	894
2008	740
2009	1,315
2010	962
2011	959
2012	848
2013	884
2014	522
2015	956
2016	567
2017	780
2018	525
2019	1,668
2020	707
2021	1,131
2022	1,512
2023	794
2024	751
2025	776
2026	356

Download the Data

Data for records on 1925-05-21: 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 2026-10-13 (13 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 10	205
10 to 20	0
20 to 30	3
30 to 40	0
40 to 50	1