Weather Records on 20 May 1948

514 weather records were set or tied worldwide on 20 May 1948. Highest significance: Folsom, US.

Key Facts for 20 May 1948

On 20 May 1948, 514 weather records were set or tied at long-record stations worldwide.
251 were record highs and 178 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 504 daily.
Folsom set a daily record precipitation of 39.6 mm (1.6 in) on 20 May 1948.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 455 records.

Record Map

514 stations

514 station records on 20 May 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Folsom	United States	Record daily precipitation	39.6 mm (1.6 in)	44 of 100 (Notable)
Boylston	United States	Record daily precipitation	84.1 mm (3.3 in)	41 of 100 (Notable)
Pinsk	Belarus	Record daily precipitation	29.1 mm (1.1 in)	36 of 100 (Notable)
Alipurduar	India	Record daily precipitation	117.3 mm (4.6 in)	35 of 100 (Notable)
Auburn	United States	Record daily precipitation	44.5 mm (1.8 in)	35 of 100 (Notable)
Highmore	United States	Record high minimum temperature	19.4 C (66.9 F)	30 of 100 (Routine)
Patu	Brazil	Record daily precipitation	46.0 mm (1.8 in)	28 of 100 (Routine)
Gray	United States	Record high minimum temperature	11.1 C (52.0 F)	28 of 100 (Routine)
Green Bay	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)
Barramunga	Australia	Record daily precipitation	46.7 mm (1.8 in)	27 of 100 (Routine)
New England	United States	Record high maximum temperature	37.2 C (99.0 F)	27 of 100 (Routine)
Las Plumas	United States	Record low maximum temperature	12.8 C (55.0 F)	26 of 100 (Routine)
Beardsley	United States	Record high minimum temperature	21.1 C (70.0 F)	26 of 100 (Routine)
Valley City 3 NNW	United States	Record high minimum temperature	17.2 C (63.0 F)	26 of 100 (Routine)
New Iberia AP - Acadiana Rgnl	United States	Record high maximum temperature	33.9 C (93.0 F)	25 of 100 (Routine)
Washburn	United States	Record high maximum temperature	33.9 C (93.0 F)	25 of 100 (Routine)
San Jose	United States	Record low maximum temperature	14.4 C (57.9 F)	24 of 100 (Routine)
Yreka	United States	Record low maximum temperature	6.7 C (44.1 F)	24 of 100 (Routine)
Deland 1 SSE	United States	Record low minimum temperature	10.0 C (50.0 F)	24 of 100 (Routine)
Artichoke Lake 1 E	United States	Record high minimum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
McGill	United States	Record low minimum temperature	-2.2 C (28.0 F)	24 of 100 (Routine)
Fortaleza (Escola Regional)	Brazil	Record daily precipitation	43.6 mm (1.7 in)	23 of 100 (Routine)
North Bay	Canada	Record low maximum temperature	8.9 C (48.0 F)	23 of 100 (Routine)
Kirensk	Russia	Record low minimum temperature	-7.9 C (17.8 F)	23 of 100 (Routine)
North Bridgton	United States	Record low maximum temperature	8.3 C (46.9 F)	23 of 100 (Routine)
Blue Hill Coop	United States	Record low minimum temperature	2.8 C (37.0 F)	23 of 100 (Routine)
Milan 1NW	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Carson City	United States	Record low maximum temperature	11.1 C (52.0 F)	23 of 100 (Routine)
Bottineau	United States	Record high minimum temperature	13.9 C (57.0 F)	23 of 100 (Routine)
Wahpeton 3 N	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Maricopa 9 SSW	United States	Record low minimum temperature	6.1 C (43.0 F)	22 of 100 (Routine)
San Jacinto	United States	Record low minimum temperature	2.8 C (37.0 F)	22 of 100 (Routine)
Susanville 2SW	United States	Record low maximum temperature	9.4 C (48.9 F)	22 of 100 (Routine)
New Meadows Rs	United States	Record high minimum temperature	10.0 C (50.0 F)	22 of 100 (Routine)
New London	United States	Record high minimum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Willmar Wwtp	United States	Record high minimum temperature	17.2 C (63.0 F)	22 of 100 (Routine)
Lodgepole	United States	Record high minimum temperature	16.1 C (61.0 F)	22 of 100 (Routine)
Berlin	United States	Record low maximum temperature	6.7 C (44.1 F)	22 of 100 (Routine)
Regina	United States	Record high minimum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Jamestown State Hosp	United States	Record high minimum temperature	15.6 C (60.1 F)	22 of 100 (Routine)
Clark	United States	Record high minimum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Vilnius	Lithuania	Record daily precipitation	28.8 mm (1.1 in)	21 of 100 (Routine)
Auburn	United States	Record low maximum temperature	10.6 C (51.1 F)	21 of 100 (Routine)
Sibley	United States	Record high maximum temperature	32.8 C (91.0 F)	21 of 100 (Routine)
Meadowlands 9 S	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Moorhead St Teachers C	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Bedford Hills	United States	Record low minimum temperature	1.7 C (35.1 F)	21 of 100 (Routine)
Heppner	United States	Record low maximum temperature	10.0 C (50.0 F)	21 of 100 (Routine)
Umatilla	United States	Record low maximum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Eureka	United States	Record high minimum temperature	21.1 C (70.0 F)	21 of 100 (Routine)
Manitowoc	United States	Record high maximum temperature	30.0 C (86.0 F)	21 of 100 (Routine)
Rimrock Tieton Dam	United States	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Enisejsk	Russia	Record daily precipitation	11.1 mm (0.4 in)	20 of 100 (Routine)
Colfax	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Emsdale	Canada	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Kapskarmo	Norway	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Longwarry	Australia	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Maraisburg (Gm)	South Africa	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Nikolaev	Ukraine	Record daily precipitation	8.0 mm (0.31 in)	20 of 100 (Routine)
Polson	United States	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

514 records

Records set or tied on 20 May 1948 by type: Highest daily maximum 75, Lowest daily maximum 76, Highest daily minimum 176, Lowest daily minimum 102, Heaviest daily rainfall 85.

Records on 20 May 1948 by type
Record type	Records
Highest daily maximum	75
Lowest daily maximum	76
Highest daily minimum	176
Lowest daily minimum	102
Heaviest daily rainfall	85
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 May 1948 by timescale: all-time 0, monthly 10, daily 504.

How Much Records Were Beaten By

399 broken records

Margins by which the 399 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 57.9. Ties are not counted.

Top 20 by Significance

20 May 1948

Top 20 records on 20 May 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1948	Folsom, US	daily rain	39.6 mm (1.6 in)	24.9 mm (1.0 in)	23 years	44 of 100 (Notable)
20 May 1948	Boylston, US	daily rain	84.1 mm (3.3 in)	33.0 mm (1.3 in)	47 years	41 of 100 (Notable)
20 May 1948	Pinsk, BY	daily rain	29.1 mm (1.1 in)	15.8 mm (0.6 in)	1 year	36 of 100 (Notable)
20 May 1948	Alipurduar, IN	daily rain	117.3 mm (4.6 in)	57.9 mm (2.3 in)	39 years	35 of 100 (Notable)
20 May 1948	Auburn, US	daily rain	44.5 mm (1.8 in)	21.6 mm (0.9 in)	36 years	35 of 100 (Notable)
20 May 1948	Highmore, US	daily high min	19.4 C (66.9 F)	6.1 C (11.0 F)	47 years	30 of 100 (Routine)
20 May 1948	Patu, BR	daily rain	46.0 mm (1.8 in)	38.0 mm (1.5 in)	3 years	28 of 100 (Routine)
20 May 1948	Gray, US	daily high min	11.1 C (52.0 F)	5.5 C (9.9 F)	28 years	28 of 100 (Routine)
20 May 1948	Green Bay, US	daily high max	32.2 C (90.0 F)	2.8 C (5.0 F)	60 years	28 of 100 (Routine)
20 May 1948	Barramunga, AU	daily rain	46.7 mm (1.8 in)	13.7 mm (0.5 in)	31 years	27 of 100 (Routine)
20 May 1948	New England, US	daily high max	37.2 C (99.0 F)	5.5 C (9.9 F)	47 years	27 of 100 (Routine)
20 May 1948	Las Plumas, US	daily low max	12.8 C (55.0 F)	7.8 C (14.0 F)	33 years	26 of 100 (Routine)
20 May 1948	Beardsley, US	daily high min	21.1 C (70.0 F)	6.1 C (11.0 F)	34 years	26 of 100 (Routine)
20 May 1948	Valley City 3 NNW, US	daily high min	17.2 C (63.0 F)	4.4 C (7.9 F)	46 years	26 of 100 (Routine)
20 May 1948	New Iberia AP - Acadiana Rgnl, US	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	40 years	25 of 100 (Routine)
20 May 1948	Washburn, US	daily high max	33.9 C (93.0 F)	3.9 C (7.0 F)	47 years	25 of 100 (Routine)
20 May 1948	San Jose, US	daily low max	14.4 C (57.9 F)	3.4 C (6.1 F)	39 years	24 of 100 (Routine)
20 May 1948	Yreka, US	monthly low max	6.7 C (44.1 F)	0.5 C (0.9 F)	33 years	24 of 100 (Routine)
20 May 1948	Deland 1 SSE, US	daily low min	10.0 C (50.0 F)	3.3 C (5.9 F)	31 years	24 of 100 (Routine)
20 May 1948	Artichoke Lake 1 E, US	daily high min	20.0 C (68.0 F)	7.2 C (13.0 F)	27 years	24 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

1802 to 1948

Records set or tied on this calendar date in each year from 1802 to 1948. 1948 had 514 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 1948-05-20: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	383
10 to 20	10
20 to 30	3
30 to 40	2
40 to 50	0
50 to 60	1