Weather Records on 21 May 1929

247 weather records were set or tied worldwide on 21 May 1929. Highest significance: Raton, US.

Key Facts for 21 May 1929

On 21 May 1929, 247 weather records were set or tied at long-record stations worldwide.
22 were record highs and 182 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 5 monthly and 242 daily.
Raton set a monthly record daily precipitation of 86.4 mm (3.4 in) on 21 May 1929.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

247 stations

247 station records on 21 May 1929 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1929: highest significance records shown on the map
Station	Country	Type	Value	Significance
Raton	United States	Record daily precipitation	86.4 mm (3.4 in)	60 of 100 (Major)
Windsor Kings College	Canada	Record daily precipitation	37.1 mm (1.5 in)	59 of 100 (Notable)
Minsk	Belarus	Record daily precipitation	36.0 mm (1.4 in)	50 of 100 (Notable)
Whitehead	Canada	Record daily precipitation	77.0 mm (3.0 in)	39 of 100 (Notable)
West Berne	United States	Record daily precipitation	31.5 mm (1.2 in)	39 of 100 (Notable)
Bundaleer Forest Reserve	Australia	Record daily precipitation	29.0 mm (1.1 in)	33 of 100 (Routine)
Louisburg	United States	Record daily precipitation	59.7 mm (2.4 in)	29 of 100 (Routine)
Edenton	United States	Record daily precipitation	34.3 mm (1.4 in)	26 of 100 (Routine)
Danevang 1 W	United States	Record low maximum temperature	22.8 C (73.0 F)	26 of 100 (Routine)
Yarmouth	Canada	Record daily precipitation	38.4 mm (1.5 in)	23 of 100 (Routine)
Augusta	United States	Record daily precipitation	45.7 mm (1.8 in)	23 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	6.7 C (44.1 F)	22 of 100 (Routine)
Moncure 3 SE	United States	Record daily precipitation	53.3 mm (2.1 in)	22 of 100 (Routine)
Pawtucket	United States	Record low maximum temperature	7.2 C (45.0 F)	22 of 100 (Routine)
Mahackala	Russia	Record high minimum temperature	19.2 C (66.6 F)	21 of 100 (Routine)
Lakeview 2 NNW	United States	Record high minimum temperature	12.8 C (55.0 F)	21 of 100 (Routine)
Los Lunas	United States	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Charlottetown	Canada	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Hallett (Old Canowie)	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Biskra	Algeria	Record daily precipitation	5.2 mm (0.20 in)	20 of 100 (Routine)
Blakely	United States	Record daily precipitation	54.4 mm (2.1 in)	20 of 100 (Routine)
Milledgeville	United States	Record daily precipitation	71.1 mm (2.8 in)	20 of 100 (Routine)
Takoma Park # 1	United States	Record low maximum temperature	11.1 C (52.0 F)	20 of 100 (Routine)
Lakeside	United States	Record high maximum temperature	32.8 C (91.0 F)	20 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record high maximum temperature	23.6 C (74.5 F)	18 of 100 (Routine)
Morrison	United States	Record low minimum temperature	0.6 C (33.1 F)	18 of 100 (Routine)
Amherst	United States	Record low maximum temperature	9.4 C (48.9 F)	18 of 100 (Routine)
Unionville	United States	Record low minimum temperature	2.8 C (37.0 F)	18 of 100 (Routine)
Santa Fe	United States	Record daily precipitation	36.6 mm (1.4 in)	18 of 100 (Routine)
Wolfville	Canada	Record daily precipitation	32.3 mm (1.3 in)	17 of 100 (Routine)
Astana	Kazakhstan	Record low minimum temperature	-3.4 C (25.9 F)	17 of 100 (Routine)
Durango	United States	Record low maximum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Bloomington Normal	United States	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)
Clinton #1	United States	Record low minimum temperature	1.7 C (35.1 F)	17 of 100 (Routine)
Iowa City	United States	Record low minimum temperature	1.7 C (35.1 F)	17 of 100 (Routine)
Olin	United States	Record low minimum temperature	0.0 C (32.0 F)	17 of 100 (Routine)
Fall River	United States	Record low maximum temperature	8.3 C (46.9 F)	17 of 100 (Routine)
Lawrence	United States	Record low maximum temperature	7.8 C (46.0 F)	17 of 100 (Routine)
Provincetown 3 NW	United States	Record low maximum temperature	6.1 C (43.0 F)	17 of 100 (Routine)
Holly Springs 2 N	United States	Record low minimum temperature	8.3 C (46.9 F)	17 of 100 (Routine)
Keene	United States	Record low maximum temperature	11.1 C (52.0 F)	17 of 100 (Routine)
Joseph	United States	Record high minimum temperature	9.4 C (48.9 F)	17 of 100 (Routine)
Ft Stockton 1	United States	Record daily precipitation	12.7 mm (0.5 in)	17 of 100 (Routine)
Moorefield 1 SSE	United States	Record low maximum temperature	11.1 C (52.0 F)	17 of 100 (Routine)
Hillsboro	United States	Record low minimum temperature	1.7 C (35.1 F)	16 of 100 (Routine)
Knoxville	United States	Record low minimum temperature	2.8 C (37.0 F)	16 of 100 (Routine)
Schriever	United States	Record low maximum temperature	25.6 C (78.1 F)	16 of 100 (Routine)
Lewiston	United States	Record low maximum temperature	6.7 C (44.1 F)	16 of 100 (Routine)
Duck Hill	United States	Record low minimum temperature	7.2 C (45.0 F)	16 of 100 (Routine)
Cutchogue	United States	Record low maximum temperature	9.4 C (48.9 F)	16 of 100 (Routine)
Uniontown 1 NE	United States	Record low maximum temperature	11.1 C (52.0 F)	16 of 100 (Routine)
Little Mtn	United States	Record low minimum temperature	10.0 C (50.0 F)	16 of 100 (Routine)
Lost Creek Near	United States	Record low maximum temperature	11.1 C (52.0 F)	16 of 100 (Routine)
Atlantic City Marina	United States	Record low maximum temperature	10.6 C (51.1 F)	16 of 100 (Routine)
Thomasville	United States	Record low maximum temperature	21.7 C (71.1 F)	15 of 100 (Routine)
Sparta 1 W	United States	Record low minimum temperature	3.3 C (37.9 F)	15 of 100 (Routine)
White Hall 1 E	United States	Record low minimum temperature	1.7 C (35.1 F)	15 of 100 (Routine)
Belle Plaine	United States	Record low minimum temperature	1.1 C (34.0 F)	15 of 100 (Routine)
Cedar Rapids #1	United States	Record low minimum temperature	0.0 C (32.0 F)	15 of 100 (Routine)
Mt Sterling	United States	Record low maximum temperature	11.7 C (53.1 F)	15 of 100 (Routine)

Counts by Type and Timescale

247 records

Records set or tied on 21 May 1929 by type: Highest daily maximum 8, Lowest daily maximum 76, Highest daily minimum 14, Lowest daily minimum 106, Heaviest daily rainfall 43.

Records on 21 May 1929 by type
Record type	Records
Highest daily maximum	8
Lowest daily maximum	76
Highest daily minimum	14
Lowest daily minimum	106
Heaviest daily rainfall	43
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 1929 by timescale: all-time 0, monthly 5, daily 242.

How Much Records Were Beaten By

198 broken records

Margins by which the 198 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.6. Ties are not counted.

Top 20 by Significance

21 May 1929

Top 20 records on 21 May 1929 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1929	Raton, US	monthly rain	86.4 mm (3.4 in)	35.6 mm (1.4 in)	32 years	60 of 100 (Major)
21 May 1929	Windsor Kings College, CA	daily rain	37.1 mm (1.5 in)	32.5 mm (1.3 in)	48 years	59 of 100 (Notable)
21 May 1929	Minsk, BY	daily rain	36.0 mm (1.4 in)	28.3 mm (1.1 in)	24 years	50 of 100 (Notable)
21 May 1929	Whitehead, CA	monthly rain	77.0 mm (3.0 in)	23.7 mm (0.9 in)	10 years	39 of 100 (Notable)
21 May 1929	West Berne, US	daily rain	31.5 mm (1.2 in)	23.6 mm (0.9 in)	20 years	39 of 100 (Notable)
21 May 1929	Bundaleer Forest Reserve, AU	daily rain	29.0 mm (1.1 in)	18.1 mm (0.7 in)	18 years	33 of 100 (Routine)
21 May 1929	Louisburg, US	daily rain	59.7 mm (2.4 in)	21.6 mm (0.9 in)	32 years	29 of 100 (Routine)
21 May 1929	Edenton, US	daily rain	34.3 mm (1.4 in)	23.6 mm (0.9 in)	20 years	26 of 100 (Routine)
21 May 1929	Danevang 1 W, US	daily low max	22.8 C (73.0 F)	4.4 C (7.9 F)	28 years	26 of 100 (Routine)
21 May 1929	Yarmouth, CA	daily rain	38.4 mm (1.5 in)	3.6 mm (0.14 in)	47 years	23 of 100 (Routine)
21 May 1929	Augusta, US	daily rain	45.7 mm (1.8 in)	18.0 mm (0.7 in)	20 years	23 of 100 (Routine)
21 May 1929	Yarmouth, CA	daily low max	6.7 C (44.1 F)	1.1 C (2.0 F)	46 years	22 of 100 (Routine)
21 May 1929	Moncure 3 SE, US	daily rain	53.3 mm (2.1 in)	17.5 mm (0.7 in)	20 years	22 of 100 (Routine)
21 May 1929	Pawtucket, US	daily low max	7.2 C (45.0 F)	5.6 C (10.1 F)	29 years	22 of 100 (Routine)
21 May 1929	Mahackala, RU	daily high min	19.2 C (66.6 F)	1.6 C (2.9 F)	40 years	21 of 100 (Routine)
21 May 1929	Lakeview 2 NNW, US	daily high min	12.8 C (55.0 F)	3.4 C (6.1 F)	31 years	21 of 100 (Routine)
21 May 1929	Los Lunas, US	daily rain	23.4 mm (0.9 in)	20.9 mm (0.8 in)	33 years	20 of 100 (Routine)
21 May 1929	Charlottetown, CA	daily rain	19.8 mm (0.8 in)	8.1 mm (0.32 in)	47 years	20 of 100 (Routine)
21 May 1929	Hallett (Old Canowie), AU	daily rain	21.8 mm (0.9 in)	14.2 mm (0.6 in)	3 years	20 of 100 (Routine)
21 May 1929	Biskra, DZ	daily rain	5.2 mm (0.20 in)	5.2 mm (0.20 in)	48 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 1929

Records set or tied on this calendar date in each year from 1793 to 1929. 1929 had 247 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 1929-05-21: 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	172
5 to 10	11
10 to 15	3
15 to 20	4
20 to 25	5
25 to 30	1
30 to 35	1
35 to 40	1