Weather Records on 21 May 1928

173 weather records were set or tied worldwide on 21 May 1928. Highest significance: Bremen-Seefahrtschule, DE.

Key Facts for 21 May 1928

On 21 May 1928, 173 weather records were set or tied at long-record stations worldwide.
75 were record highs and 35 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 6 monthly and 167 daily.
Bremen-Seefahrtschule set a daily record precipitation of 29.1 mm (1.1 in) on 21 May 1928.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

173 stations

173 station records on 21 May 1928 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1928: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bremen-Seefahrtschule	Germany	Record daily precipitation	29.1 mm (1.1 in)	49 of 100 (Notable)
Schwerin	Germany	Record daily precipitation	32.1 mm (1.3 in)	48 of 100 (Notable)
Berlin-Dahlem	Germany	Record daily precipitation	32.7 mm (1.3 in)	36 of 100 (Notable)
Donaldsonville 4 SW	United States	Record daily precipitation	73.9 mm (2.9 in)	28 of 100 (Routine)
Roberts Dam	United States	Record daily precipitation	27.7 mm (1.1 in)	27 of 100 (Routine)
Barkerville	Canada	Record high maximum temperature	24.4 C (75.9 F)	26 of 100 (Routine)
Battleford	Canada	Record high maximum temperature	34.4 C (93.9 F)	26 of 100 (Routine)
Lubeck-Werft	Germany	Record daily precipitation	37.4 mm (1.5 in)	25 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	10.6 C (51.1 F)	25 of 100 (Routine)
Altentreptow	Germany	Record daily precipitation	25.0 mm (1.0 in)	24 of 100 (Routine)
Johnsonville	United States	Record daily precipitation	44.7 mm (1.8 in)	24 of 100 (Routine)
Teterow	Germany	Record daily precipitation	27.8 mm (1.1 in)	23 of 100 (Routine)
Belle Isle	Canada	Record high maximum temperature	10.0 C (50.0 F)	21 of 100 (Routine)
Kerkwerve	Netherlands	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Ter Apel	Netherlands	Record daily precipitation	24.5 mm (1.0 in)	20 of 100 (Routine)
Goldberg	Germany	Record daily precipitation	17.2 mm (0.7 in)	20 of 100 (Routine)
Heerde	Netherlands	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Bederkesa	Germany	Record daily precipitation	22.3 mm (0.9 in)	20 of 100 (Routine)
Kirchdorf/Poel	Germany	Record daily precipitation	24.5 mm (1.0 in)	20 of 100 (Routine)
Hoorn	Netherlands	Record daily precipitation	14.8 mm (0.6 in)	20 of 100 (Routine)
Falsterbo	Sweden	Record daily precipitation	15.3 mm (0.6 in)	20 of 100 (Routine)
Lund	Sweden	Record daily precipitation	9.7 mm (0.38 in)	20 of 100 (Routine)
Redbank Post Office	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Putten (Gld)	Netherlands	Record daily precipitation	11.5 mm (0.5 in)	20 of 100 (Routine)
Sandvig	Denmark	Record daily precipitation	9.3 mm (0.37 in)	20 of 100 (Routine)
Hoofddorp	Netherlands	Record daily precipitation	12.6 mm (0.5 in)	20 of 100 (Routine)
Scheveningen	Netherlands	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Berlin-Dahlem	Germany	Record low maximum temperature	10.5 C (50.9 F)	20 of 100 (Routine)
Soltau	Germany	Record daily precipitation	19.4 mm (0.8 in)	20 of 100 (Routine)
Wangerooge	Germany	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Lake City 2 E	United States	Record daily precipitation	38.1 mm (1.5 in)	20 of 100 (Routine)
New Orleans Audubon	United States	Record daily precipitation	78.7 mm (3.1 in)	20 of 100 (Routine)
Pullman Exp STN	United States	Record high minimum temperature	15.6 C (60.1 F)	19 of 100 (Routine)
Cleveland Bowls Club	Australia	Record daily precipitation	24.4 mm (1.0 in)	18 of 100 (Routine)
Yamba Pilot Station	Australia	Record daily precipitation	30.5 mm (1.2 in)	18 of 100 (Routine)
Weston 2 SE	United States	Record high minimum temperature	15.6 C (60.1 F)	18 of 100 (Routine)
Colfax	United States	Record high minimum temperature	12.8 C (55.0 F)	18 of 100 (Routine)
Lismore (Centre Street)	Australia	Record daily precipitation	18.8 mm (0.7 in)	17 of 100 (Routine)
Edmonton	Canada	Record high maximum temperature	31.7 C (89.1 F)	17 of 100 (Routine)
Medicine Hat A	Canada	Record high maximum temperature	34.4 C (93.9 F)	17 of 100 (Routine)
Banff	Canada	Record high maximum temperature	26.7 C (80.1 F)	17 of 100 (Routine)
Weissenfels	Germany	Record daily precipitation	20.4 mm (0.8 in)	17 of 100 (Routine)
Robeline	United States	Record daily precipitation	76.2 mm (3.0 in)	17 of 100 (Routine)
Jacksonville	United States	Record high minimum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Spokane Intl AP	United States	Record high minimum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Enoggera Reservoir	Australia	Record daily precipitation	8.1 mm (0.32 in)	16 of 100 (Routine)
Ballina (Crowley Village)	Australia	Record daily precipitation	37.3 mm (1.5 in)	16 of 100 (Routine)
Kamloops	Canada	Record high minimum temperature	15.0 C (59.0 F)	16 of 100 (Routine)
Swift Current	Canada	Record high maximum temperature	34.4 C (93.9 F)	16 of 100 (Routine)
Potsdam	Germany	Record low maximum temperature	9.9 C (49.8 F)	16 of 100 (Routine)
Waren	Germany	Record daily precipitation	13.5 mm (0.5 in)	16 of 100 (Routine)
Baton Rouge	United States	Record daily precipitation	58.4 mm (2.3 in)	16 of 100 (Routine)
Framingham	United States	Record daily precipitation	28.2 mm (1.1 in)	16 of 100 (Routine)
Fort St James	Canada	Record high maximum temperature	28.3 C (82.9 F)	15 of 100 (Routine)
Tranebjerg	Denmark	Record low minimum temperature	2.4 C (36.3 F)	15 of 100 (Routine)
New Orleans Carrollton	United States	Record daily precipitation	62.5 mm (2.5 in)	15 of 100 (Routine)
Ashland	United States	Record high minimum temperature	12.8 C (55.0 F)	15 of 100 (Routine)
Grants Pass	United States	Record high minimum temperature	12.2 C (54.0 F)	15 of 100 (Routine)
Fort National	Algeria	Record low minimum temperature	6.0 C (42.8 F)	14 of 100 (Routine)
Wolston Park Hospital	Australia	Record daily precipitation	16.0 mm (0.6 in)	14 of 100 (Routine)

Counts by Type and Timescale

173 records

Records set or tied on 21 May 1928 by type: Highest daily maximum 41, Lowest daily maximum 15, Highest daily minimum 34, Lowest daily minimum 20, Heaviest daily rainfall 63.

Records on 21 May 1928 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	15
Highest daily minimum	34
Lowest daily minimum	20
Heaviest daily rainfall	63
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 1928 by timescale: all-time 0, monthly 6, daily 167.

How Much Records Were Beaten By

141 broken records

Margins by which the 141 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 38.6. Ties are not counted.

Top 20 by Significance

21 May 1928

Top 20 records on 21 May 1928 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1928	Bremen-Seefahrtschule, DE	daily rain	29.1 mm (1.1 in)	22.6 mm (0.9 in)	20 years	49 of 100 (Notable)
21 May 1928	Schwerin, DE	daily rain	32.1 mm (1.3 in)	20.4 mm (0.8 in)	32 years	48 of 100 (Notable)
21 May 1928	Berlin-Dahlem, DE	daily rain	32.7 mm (1.3 in)	16.5 mm (0.6 in)	7 years	36 of 100 (Notable)
21 May 1928	Donaldsonville 4 SW, US	daily rain	73.9 mm (2.9 in)	38.6 mm (1.5 in)	32 years	28 of 100 (Routine)
21 May 1928	Roberts Dam, US	daily rain	27.7 mm (1.1 in)	12.5 mm (0.5 in)	37 years	27 of 100 (Routine)
21 May 1928	Barkerville, CA	daily high max	24.4 C (75.9 F)	5.5 C (9.9 F)	36 years	26 of 100 (Routine)
21 May 1928	Battleford, CA	monthly high max	34.4 C (93.9 F)	0.5 C (0.9 F)	36 years	26 of 100 (Routine)
21 May 1928	Lubeck-Werft, DE	monthly rain	37.4 mm (1.5 in)	3.4 mm (0.13 in)	18 years	25 of 100 (Routine)
21 May 1928	Irkutsk, RU	daily high min	10.6 C (51.1 F)	4.1 C (7.4 F)	38 years	25 of 100 (Routine)
21 May 1928	Altentreptow, DE	daily rain	25.0 mm (1.0 in)	8.4 mm (0.33 in)	21 years	24 of 100 (Routine)
21 May 1928	Johnsonville, US	daily rain	44.7 mm (1.8 in)	18.5 mm (0.7 in)	29 years	24 of 100 (Routine)
21 May 1928	Teterow, DE	daily rain	27.8 mm (1.1 in)	7.6 mm (0.30 in)	28 years	23 of 100 (Routine)
21 May 1928	Belle Isle, CA	daily high max	10.0 C (50.0 F)	1.7 C (3.1 F)	37 years	21 of 100 (Routine)
21 May 1928	Kerkwerve, NL	daily rain	18.3 mm (0.7 in)	13.3 mm (0.5 in)	49 years	20 of 100 (Routine)
21 May 1928	Ter Apel, NL	daily rain	24.5 mm (1.0 in)	15.5 mm (0.6 in)	34 years	20 of 100 (Routine)
21 May 1928	Goldberg, DE	daily rain	17.2 mm (0.7 in)	10.2 mm (0.4 in)	20 years	20 of 100 (Routine)
21 May 1928	Heerde, NL	daily rain	16.3 mm (0.6 in)	10.0 mm (0.4 in)	31 years	20 of 100 (Routine)
21 May 1928	Bederkesa, DE	daily rain	22.3 mm (0.9 in)	11.2 mm (0.4 in)	20 years	20 of 100 (Routine)
21 May 1928	Kirchdorf/Poel, DE	daily rain	24.5 mm (1.0 in)	8.5 mm (0.33 in)	4 years	20 of 100 (Routine)
21 May 1928	Hoorn, NL	daily rain	14.8 mm (0.6 in)	6.0 mm (0.24 in)	20 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 1928

Records set or tied on this calendar date in each year from 1793 to 1928. 1928 had 173 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 1928-05-21: 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 2026-10-14 (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 5	101
5 to 10	20
10 to 15	8
15 to 20	6
20 to 25	3
25 to 30	1
30 to 35	0
35 to 40	2