Weather Records on 20 May 1928

138 weather records were set or tied worldwide on 20 May 1928. Highest significance: Seal Rocks Camping Reserve, AU.

Key Facts for 20 May 1928

On 20 May 1928, 138 weather records were set or tied at long-record stations worldwide.
63 were record highs and 11 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 137 daily.
Seal Rocks Camping Reserve set a daily record precipitation of 82.8 mm (3.3 in) on 20 May 1928.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 458 records.

Record Map

138 stations

138 station records on 20 May 1928 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 1928: highest significance records shown on the map
Station	Country	Type	Value	Significance
Seal Rocks Camping Reserve	Australia	Record daily precipitation	82.8 mm (3.3 in)	44 of 100 (Notable)
Demopolis Lock 4	United States	Record daily precipitation	103.1 mm (4.1 in)	44 of 100 (Notable)
New Cumberland L/D	United States	Record daily precipitation	40.6 mm (1.6 in)	44 of 100 (Notable)
Newport 1 NW	United States	Record daily precipitation	53.3 mm (2.1 in)	40 of 100 (Notable)
Berlin-Dahlem (Lfag)	Germany	Record daily precipitation	32.7 mm (1.3 in)	36 of 100 (Notable)
Lewiston	United States	Record daily precipitation	39.1 mm (1.5 in)	36 of 100 (Notable)
Redbank Post Office	Australia	Record daily precipitation	38.4 mm (1.5 in)	35 of 100 (Notable)
Portland	United States	Record daily precipitation	58.7 mm (2.3 in)	34 of 100 (Routine)
Woodville 4 ESE	United States	Record daily precipitation	80.0 mm (3.1 in)	32 of 100 (Routine)
Mohonk Lake	United States	Record daily precipitation	41.9 mm (1.6 in)	31 of 100 (Routine)
Harrisburg River Gage	United States	Record daily precipitation	27.9 mm (1.1 in)	31 of 100 (Routine)
Solomons	United States	Record daily precipitation	29.2 mm (1.1 in)	30 of 100 (Routine)
Bay Saint Louis	United States	Record daily precipitation	55.9 mm (2.2 in)	28 of 100 (Routine)
Fitchburg 4 SE	United States	Record daily precipitation	26.9 mm (1.1 in)	27 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record low minimum temperature	3.9 C (39.0 F)	26 of 100 (Routine)
Simferopol	Ukraine	Record high minimum temperature	17.4 C (63.3 F)	26 of 100 (Routine)
Calhoun 2 N	United States	Record daily precipitation	64.0 mm (2.5 in)	24 of 100 (Routine)
Chestnut Hill	United States	Record daily precipitation	35.8 mm (1.4 in)	24 of 100 (Routine)
Canton	United States	Record daily precipitation	50.3 mm (2.0 in)	23 of 100 (Routine)
Glens Falls Fire STN	United States	Record daily precipitation	28.2 mm (1.1 in)	22 of 100 (Routine)
Biloxi	United States	Record daily precipitation	43.2 mm (1.7 in)	21 of 100 (Routine)
Weston 2 SE	United States	Record high maximum temperature	33.9 C (93.0 F)	21 of 100 (Routine)
Tartu	Estonia	Record daily precipitation	17.1 mm (0.7 in)	20 of 100 (Routine)
St. Petersburg	Russia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Ladner	Canada	Record high minimum temperature	13.3 C (55.9 F)	20 of 100 (Routine)
Princeton	Canada	Record high maximum temperature	31.7 C (89.1 F)	20 of 100 (Routine)
Ueckermunde	Germany	Record daily precipitation	19.2 mm (0.8 in)	20 of 100 (Routine)
Paoli	United States	Record daily precipitation	51.3 mm (2.0 in)	19 of 100 (Routine)
Clinton Forestry HQ	United States	Record daily precipitation	43.2 mm (1.7 in)	19 of 100 (Routine)
Farmington	United States	Record daily precipitation	20.6 mm (0.8 in)	19 of 100 (Routine)
Leominster	United States	Record daily precipitation	27.2 mm (1.1 in)	19 of 100 (Routine)
Plymouth	United States	Record daily precipitation	18.0 mm (0.7 in)	19 of 100 (Routine)
Cascade Locks	United States	Record high maximum temperature	33.9 C (93.0 F)	19 of 100 (Routine)
Moxee	United States	Record high maximum temperature	33.3 C (91.9 F)	19 of 100 (Routine)
Boston City WSO	United States	Record daily precipitation	28.2 mm (1.1 in)	19 of 100 (Routine)
Quatsino	Canada	Record high maximum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Hammond	United States	Record daily precipitation	48.3 mm (1.9 in)	18 of 100 (Routine)
Towanda 1 S	United States	Record daily precipitation	24.6 mm (1.0 in)	18 of 100 (Routine)
Portland Rfc City	United States	Record high minimum temperature	15.0 C (59.0 F)	18 of 100 (Routine)
Gardiner	United States	Record daily precipitation	23.6 mm (0.9 in)	17 of 100 (Routine)
Rosalia	United States	Record high maximum temperature	30.0 C (86.0 F)	17 of 100 (Routine)
Chilliwack	Canada	Record high maximum temperature	31.7 C (89.1 F)	16 of 100 (Routine)
St John's	Canada	Record low maximum temperature	4.4 C (39.9 F)	16 of 100 (Routine)
Selma	United States	Record daily precipitation	50.0 mm (2.0 in)	16 of 100 (Routine)
Waterville Wwtp	United States	Record daily precipitation	31.0 mm (1.2 in)	16 of 100 (Routine)
Concord	United States	Record daily precipitation	15.5 mm (0.6 in)	16 of 100 (Routine)
The Dalles	United States	Record high maximum temperature	37.2 C (99.0 F)	16 of 100 (Routine)
Tobolsk	Russia	Record low minimum temperature	-2.6 C (27.3 F)	15 of 100 (Routine)
Orenburg	Russia	Record daily precipitation	24.0 mm (0.9 in)	15 of 100 (Routine)
Jennings	United States	Record high minimum temperature	22.8 C (73.0 F)	15 of 100 (Routine)
Laurel 3 W	United States	Record daily precipitation	23.6 mm (0.9 in)	15 of 100 (Routine)
Brookhaven City	United States	Record daily precipitation	27.9 mm (1.1 in)	15 of 100 (Routine)
Beaver Dam	United States	Record daily precipitation	18.3 mm (0.7 in)	15 of 100 (Routine)
Port Townsend	United States	Record high maximum temperature	26.1 C (79.0 F)	15 of 100 (Routine)
Pullman Exp STN	United States	Record high maximum temperature	29.4 C (84.9 F)	15 of 100 (Routine)
Seattle Urban Site	United States	Record high maximum temperature	27.8 C (82.0 F)	15 of 100 (Routine)
Kamloops	Canada	Record high maximum temperature	31.7 C (89.1 F)	14 of 100 (Routine)
Saint John	Canada	Record high maximum temperature	20.0 C (68.0 F)	14 of 100 (Routine)
Highland Home	United States	Record daily precipitation	33.3 mm (1.3 in)	14 of 100 (Routine)
San Bernardino F S 226	United States	Record high minimum temperature	13.9 C (57.0 F)	14 of 100 (Routine)

Counts by Type and Timescale

138 records

Records set or tied on 20 May 1928 by type: Highest daily maximum 38, Lowest daily maximum 7, Highest daily minimum 25, Lowest daily minimum 4, Heaviest daily rainfall 64.

Records on 20 May 1928 by type
Record type	Records
Highest daily maximum	38
Lowest daily maximum	7
Highest daily minimum	25
Lowest daily minimum	4
Heaviest daily rainfall	64
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 May 1928 by timescale: all-time 0, monthly 1, daily 137.

How Much Records Were Beaten By

119 broken records

Margins by which the 119 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 92.7. Ties are not counted.

Top 20 by Significance

20 May 1928

Top 20 records on 20 May 1928 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 1928	Seal Rocks Camping Reserve, AU	daily rain	82.8 mm (3.3 in)	68.1 mm (2.7 in)	20 years	44 of 100 (Notable)
20 May 1928	Demopolis Lock 4, US	daily rain	103.1 mm (4.1 in)	92.7 mm (3.6 in)	5 years	44 of 100 (Notable)
20 May 1928	New Cumberland L/D, US	daily rain	40.6 mm (1.6 in)	27.4 mm (1.1 in)	34 years	44 of 100 (Notable)
20 May 1928	Newport 1 NW, US	daily rain	53.3 mm (2.1 in)	34.2 mm (1.3 in)	19 years	40 of 100 (Notable)
20 May 1928	Berlin-Dahlem (Lfag), DE	daily rain	32.7 mm (1.3 in)	16.5 mm (0.6 in)	7 years	36 of 100 (Notable)
20 May 1928	Lewiston, US	daily rain	39.1 mm (1.5 in)	28.7 mm (1.1 in)	33 years	36 of 100 (Notable)
20 May 1928	Redbank Post Office, AU	daily rain	38.4 mm (1.5 in)	28.7 mm (1.1 in)	22 years	35 of 100 (Notable)
20 May 1928	Portland, US	daily rain	58.7 mm (2.3 in)	18.1 mm (0.7 in)	43 years	34 of 100 (Routine)
20 May 1928	Woodville 4 ESE, US	daily rain	80.0 mm (3.1 in)	47.2 mm (1.9 in)	22 years	32 of 100 (Routine)
20 May 1928	Mohonk Lake, US	daily rain	41.9 mm (1.6 in)	27.4 mm (1.1 in)	18 years	31 of 100 (Routine)
20 May 1928	Harrisburg River Gage, US	daily rain	27.9 mm (1.1 in)	19.5 mm (0.8 in)	20 years	31 of 100 (Routine)
20 May 1928	Solomons, US	daily rain	29.2 mm (1.1 in)	16.5 mm (0.6 in)	31 years	30 of 100 (Routine)
20 May 1928	Bay Saint Louis, US	daily rain	55.9 mm (2.2 in)	50.8 mm (2.0 in)	17 years	28 of 100 (Routine)
20 May 1928	Fitchburg 4 SE, US	daily rain	26.9 mm (1.1 in)	13.7 mm (0.5 in)	33 years	27 of 100 (Routine)
20 May 1928	Cape Otway Lighthouse, AU	daily low min	3.9 C (39.0 F)	0.5 C (0.9 F)	60 years	26 of 100 (Routine)
20 May 1928	Simferopol, UA	daily high min	17.4 C (63.3 F)	3.9 C (7.0 F)	40 years	26 of 100 (Routine)
20 May 1928	Calhoun 2 N, US	daily rain	64.0 mm (2.5 in)	37.6 mm (1.5 in)	6 years	24 of 100 (Routine)
20 May 1928	Chestnut Hill, US	daily rain	35.8 mm (1.4 in)	24.9 mm (1.0 in)	21 years	24 of 100 (Routine)
20 May 1928	Canton, US	daily rain	50.3 mm (2.0 in)	21.3 mm (0.8 in)	18 years	23 of 100 (Routine)
20 May 1928	Glens Falls Fire STN, US	daily rain	28.2 mm (1.1 in)	11.4 mm (0.4 in)	19 years	22 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 1928

Records set or tied on this calendar date in each year from 1802 to 1928. 1928 had 138 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 1928-05-20: 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 20	103
20 to 40	12
40 to 60	2
60 to 80	1
80 to 100	1