Weather Records on 21 May 1948

312 weather records were set or tied worldwide on 21 May 1948. Highest significance: Thorpdale State School, AU.

Key Facts for 21 May 1948

On 21 May 1948, 312 weather records were set or tied at long-record stations worldwide.
163 were record highs and 92 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 6 monthly and 306 daily.
Thorpdale State School set a daily record precipitation of 48.3 mm (1.9 in) on 21 May 1948.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 461 records.

Record Map

312 stations

312 station records on 21 May 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Thorpdale State School	Australia	Record daily precipitation	48.3 mm (1.9 in)	49 of 100 (Notable)
Dunderlandsdalen	Norway	Record daily precipitation	27.4 mm (1.1 in)	45 of 100 (Notable)
Lanka	India	Record daily precipitation	43.7 mm (1.7 in)	37 of 100 (Notable)
Brockville	Canada	Record low maximum temperature	12.2 C (54.0 F)	35 of 100 (Notable)
Davenport	United States	Record daily precipitation	32.8 mm (1.3 in)	35 of 100 (Notable)
Holyoke	United States	Record high minimum temperature	19.4 C (66.9 F)	31 of 100 (Routine)
Annex Creek	United States	Record daily precipitation	44.7 mm (1.8 in)	31 of 100 (Routine)
Barduar	India	Record daily precipitation	57.9 mm (2.3 in)	30 of 100 (Routine)
San Jacinto	United States	Record low minimum temperature	1.7 C (35.1 F)	30 of 100 (Routine)
Triunfo	Brazil	Record daily precipitation	81.4 mm (3.2 in)	28 of 100 (Routine)
Chemnitz	Germany	Record low maximum temperature	10.1 C (50.2 F)	26 of 100 (Routine)
Dibrugarh Obsy	India	Record daily precipitation	83.6 mm (3.3 in)	26 of 100 (Routine)
Calgary Int'l A	Canada	Record daily precipitation	30.0 mm (1.2 in)	25 of 100 (Routine)
Redlands	United States	Record low minimum temperature	3.9 C (39.0 F)	25 of 100 (Routine)
Chama	United States	Record high maximum temperature	26.7 C (80.1 F)	25 of 100 (Routine)
Lennoxville	Canada	Record low maximum temperature	7.8 C (46.0 F)	24 of 100 (Routine)
Gardiner	United States	Record low maximum temperature	7.2 C (45.0 F)	24 of 100 (Routine)
Decorah	United States	Record high maximum temperature	33.9 C (93.0 F)	23 of 100 (Routine)
Lake Cochituate	United States	Record low maximum temperature	10.0 C (50.0 F)	23 of 100 (Routine)
Fruitland	United States	Record high maximum temperature	32.2 C (90.0 F)	23 of 100 (Routine)
Gorlitz	Germany	Record low maximum temperature	8.8 C (47.8 F)	22 of 100 (Routine)
Pasighat	India	Record daily precipitation	130.6 mm (5.1 in)	22 of 100 (Routine)
Ufa	Russia	Record high minimum temperature	17.9 C (64.2 F)	22 of 100 (Routine)
Poronajsk	Russia	Record high minimum temperature	6.3 C (43.3 F)	22 of 100 (Routine)
Sierra Madre Henszey	United States	Record low minimum temperature	6.1 C (43.0 F)	22 of 100 (Routine)
Collbran	United States	Record high maximum temperature	30.6 C (87.1 F)	22 of 100 (Routine)
Delta	United States	Record high maximum temperature	33.3 C (91.9 F)	22 of 100 (Routine)
New Iberia AP - Acadiana Rgnl	United States	Record high maximum temperature	34.4 C (93.9 F)	22 of 100 (Routine)
Snow Hill 4 N	United States	Record daily precipitation	44.2 mm (1.7 in)	22 of 100 (Routine)
Big Timber	United States	Record high minimum temperature	12.2 C (54.0 F)	22 of 100 (Routine)
Billings Wtp	United States	Record high minimum temperature	13.3 C (55.9 F)	22 of 100 (Routine)
Cordova AP	United States	Record low minimum temperature	-1.7 C (28.9 F)	22 of 100 (Routine)
Sveg	Sweden	Record low minimum temperature	-7.0 C (19.4 F)	21 of 100 (Routine)
Warner Springs	United States	Record low minimum temperature	-1.1 C (30.0 F)	21 of 100 (Routine)
Greeley	United States	Record high minimum temperature	12.2 C (54.0 F)	21 of 100 (Routine)
Imperial	United States	Record high maximum temperature	37.2 C (99.0 F)	21 of 100 (Routine)
Kokshetay	Kazakhstan	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Markovo	Russia	Record daily precipitation	6.5 mm (0.26 in)	20 of 100 (Routine)
Carway	Canada	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Amos	Canada	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Namdalseid	Norway	Record daily precipitation	18.4 mm (0.7 in)	20 of 100 (Routine)
Nord-Rana	Norway	Record daily precipitation	21.2 mm (0.8 in)	20 of 100 (Routine)
Susendal	Norway	Record daily precipitation	7.2 mm (0.28 in)	20 of 100 (Routine)
Beech Creek	United States	Record daily precipitation	22.6 mm (0.9 in)	20 of 100 (Routine)
Los Banos	United States	Record daily precipitation	3.6 mm (0.14 in)	20 of 100 (Routine)
Whitewood	Canada	Record high minimum temperature	15.6 C (60.1 F)	20 of 100 (Routine)
Pet Jorhat	India	Record daily precipitation	40.6 mm (1.6 in)	20 of 100 (Routine)
Liafoss	Norway	Record daily precipitation	19.2 mm (0.8 in)	20 of 100 (Routine)
Aleksandrovsk-Sahalinskij	Russia	Record high maximum temperature	19.8 C (67.6 F)	20 of 100 (Routine)
Timovskoe	Russia	Record high maximum temperature	22.3 C (72.1 F)	20 of 100 (Routine)
Riverside Fire STN 3	United States	Record low minimum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Sibley	United States	Record high maximum temperature	32.2 C (90.0 F)	20 of 100 (Routine)
North Bridgton	United States	Record low maximum temperature	8.3 C (46.9 F)	20 of 100 (Routine)
Rumford	United States	Record low maximum temperature	6.7 C (44.1 F)	20 of 100 (Routine)
Hyannis	United States	Record low minimum temperature	3.3 C (37.9 F)	20 of 100 (Routine)
Durham	United States	Record low maximum temperature	7.8 C (46.0 F)	20 of 100 (Routine)
Jemez Springs	United States	Record high maximum temperature	31.7 C (89.1 F)	20 of 100 (Routine)
Paisley	United States	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Grand Meadow	United States	Record high maximum temperature	33.3 C (91.9 F)	19 of 100 (Routine)
Long Prairie	United States	Record high minimum temperature	13.9 C (57.0 F)	19 of 100 (Routine)

Counts by Type and Timescale

312 records

Records set or tied on 21 May 1948 by type: Highest daily maximum 98, Lowest daily maximum 44, Highest daily minimum 65, Lowest daily minimum 48, Heaviest daily rainfall 56, Heaviest daily snowfall 1.

Records on 21 May 1948 by type
Record type	Records
Highest daily maximum	98
Lowest daily maximum	44
Highest daily minimum	65
Lowest daily minimum	48
Heaviest daily rainfall	56
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 21 May 1948 by timescale: all-time 0, monthly 6, daily 306.

How Much Records Were Beaten By

221 broken records

Margins by which the 221 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 54.1. Ties are not counted.

Top 20 by Significance

21 May 1948

Top 20 records on 21 May 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 1948	Thorpdale State School, AU	daily rain	48.3 mm (1.9 in)	28.0 mm (1.1 in)	25 years	49 of 100 (Notable)
21 May 1948	Dunderlandsdalen, NO	daily rain	27.4 mm (1.1 in)	19.4 mm (0.8 in)	22 years	45 of 100 (Notable)
21 May 1948	Lanka, IN	daily rain	43.7 mm (1.7 in)	31.0 mm (1.2 in)	46 years	37 of 100 (Notable)
21 May 1948	Brockville, CA	daily low max	12.2 C (54.0 F)	3.4 C (6.1 F)	73 years	35 of 100 (Notable)
21 May 1948	Davenport, US	monthly rain	32.8 mm (1.3 in)	2.1 mm (0.08 in)	55 years	35 of 100 (Notable)
21 May 1948	Holyoke, US	daily high min	19.4 C (66.9 F)	5.0 C (9.0 F)	50 years	31 of 100 (Routine)
21 May 1948	Annex Creek, US	daily rain	44.7 mm (1.8 in)	22.9 mm (0.9 in)	19 years	31 of 100 (Routine)
21 May 1948	Barduar, IN	daily rain	57.9 mm (2.3 in)	28.4 mm (1.1 in)	44 years	30 of 100 (Routine)
21 May 1948	San Jacinto, US	daily low min	1.7 C (35.1 F)	2.7 C (4.9 F)	54 years	30 of 100 (Routine)
21 May 1948	Triunfo, BR	daily rain	81.4 mm (3.2 in)	28.4 mm (1.1 in)	24 years	28 of 100 (Routine)
21 May 1948	Chemnitz, DE	daily low max	10.1 C (50.2 F)	0.8 C (1.4 F)	64 years	26 of 100 (Routine)
21 May 1948	Dibrugarh Obsy, IN	daily rain	83.6 mm (3.3 in)	31.8 mm (1.3 in)	19 years	26 of 100 (Routine)
21 May 1948	Calgary Int'l A, CA	daily rain	30.0 mm (1.2 in)	6.1 mm (0.24 in)	42 years	25 of 100 (Routine)
21 May 1948	Redlands, US	daily low min	3.9 C (39.0 F)	1.7 C (3.1 F)	46 years	25 of 100 (Routine)
21 May 1948	Chama, US	daily high max	26.7 C (80.1 F)	2.3 C (4.1 F)	53 years	25 of 100 (Routine)
21 May 1948	Lennoxville, CA	daily low max	7.8 C (46.0 F)	1.6 C (2.9 F)	55 years	24 of 100 (Routine)
21 May 1948	Gardiner, US	daily low max	7.2 C (45.0 F)	2.2 C (4.0 F)	48 years	24 of 100 (Routine)
21 May 1948	Decorah, US	daily high max	33.9 C (93.0 F)	3.3 C (5.9 F)	46 years	23 of 100 (Routine)
21 May 1948	Lake Cochituate, US	daily low max	10.0 C (50.0 F)	0.6 C (1.1 F)	53 years	23 of 100 (Routine)
21 May 1948	Fruitland, US	daily high max	32.2 C (90.0 F)	1.1 C (2.0 F)	53 years	23 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 1948

Records set or tied on this calendar date in each year from 1793 to 1948. 1948 had 312 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 1948-05-21: 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 10	208
10 to 20	6
20 to 30	4
30 to 40	2
40 to 50	0
50 to 60	1