Weather Records on 21 June 1918

77 weather records were set or tied worldwide on 21 June 1918. Highest significance: Putbus, DE.

Key Facts for 21 June 1918

On 21 June 1918, 77 weather records were set or tied at long-record stations worldwide.
4 were record highs and 31 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 77 daily.
Putbus set a daily record precipitation of 37.3 mm (1.5 in) on 21 June 1918.
Across 165 earlier years (1802 to 2026) the same calendar date averaged 433 records.

Record Map

77 stations

77 station records on 21 June 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 June 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Putbus	Germany	Record daily precipitation	37.3 mm (1.5 in)	55 of 100 (Notable)
Hogsback (Bos)	South Africa	Record daily precipitation	64.8 mm (2.6 in)	43 of 100 (Notable)
Bryson City 2	United States	Record daily precipitation	50.8 mm (2.0 in)	42 of 100 (Notable)
Pirie (Bos)	South Africa	Record daily precipitation	32.8 mm (1.3 in)	34 of 100 (Routine)
Dohne (Sar)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
Komga (Pol)	South Africa	Record daily precipitation	42.2 mm (1.7 in)	33 of 100 (Routine)
Yarmouth	Canada	Record low minimum temperature	1.1 C (34.0 F)	31 of 100 (Routine)
Toronto	Canada	Record low maximum temperature	15.0 C (59.0 F)	29 of 100 (Routine)
Fredericton Unb	Canada	Record low minimum temperature	0.6 C (33.1 F)	29 of 100 (Routine)
San Diego Wbo	United States	Record high minimum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
George Airport	South Africa	Record daily precipitation	32.0 mm (1.3 in)	27 of 100 (Routine)
Bloukrans (Bos)	South Africa	Record daily precipitation	43.2 mm (1.7 in)	27 of 100 (Routine)
Isidinge (Bos)	South Africa	Record daily precipitation	39.4 mm (1.6 in)	27 of 100 (Routine)
Charlottetown	Canada	Record low minimum temperature	1.1 C (34.0 F)	26 of 100 (Routine)
Gravenhurst	Canada	Record daily precipitation	31.2 mm (1.2 in)	25 of 100 (Routine)
Peterborough	Canada	Record low maximum temperature	13.9 C (57.0 F)	24 of 100 (Routine)
Kei Road (Pol)	South Africa	Record daily precipitation	34.3 mm (1.4 in)	24 of 100 (Routine)
Lindsay	Canada	Record daily precipitation	27.2 mm (1.1 in)	23 of 100 (Routine)
Kaisersbach-Cronhutte	Germany	Record daily precipitation	28.4 mm (1.1 in)	21 of 100 (Routine)
Somerset East	South Africa	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Kologha (Bos)	South Africa	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Qacu (Bos)	South Africa	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Thomas River (Sar)	South Africa	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Lenoir	United States	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Concord	United States	Record low minimum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Coldwater	Canada	Record daily precipitation	32.3 mm (1.3 in)	19 of 100 (Routine)
Chatham	Canada	Record low minimum temperature	2.2 C (36.0 F)	19 of 100 (Routine)
Halifax	Canada	Record low minimum temperature	1.7 C (35.1 F)	19 of 100 (Routine)
Willowmore	South Africa	Record daily precipitation	2.3 mm (0.09 in)	19 of 100 (Routine)
Fir Glen	South Africa	Record daily precipitation	20.3 mm (0.8 in)	19 of 100 (Routine)
Kieskamahoek (Pol)	South Africa	Record daily precipitation	24.4 mm (1.0 in)	19 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	13.3 C (55.9 F)	18 of 100 (Routine)
Saint John	Canada	Record low minimum temperature	5.6 C (42.1 F)	17 of 100 (Routine)
Yardley Chase	South Africa	Record daily precipitation	9.7 mm (0.38 in)	16 of 100 (Routine)
Vanersborg	Sweden	Record low minimum temperature	4.0 C (39.2 F)	15 of 100 (Routine)
Asheville	United States	Record daily precipitation	34.0 mm (1.3 in)	15 of 100 (Routine)
Winnemucca AP	United States	Record daily precipitation	4.6 mm (0.18 in)	15 of 100 (Routine)
Plauen	Germany	Record low maximum temperature	14.4 C (57.9 F)	14 of 100 (Routine)
Graaff Reinet	South Africa	Record daily precipitation	2.5 mm (0.10 in)	14 of 100 (Routine)
Newark Liberty Intl AP	United States	Record low minimum temperature	10.0 C (50.0 F)	14 of 100 (Routine)
Washington	United States	Record low maximum temperature	20.6 C (69.1 F)	14 of 100 (Routine)
Ny City Cntrl Park	United States	Record low maximum temperature	17.8 C (64.0 F)	14 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record low minimum temperature	-1.1 C (30.0 F)	13 of 100 (Routine)
Storrs	United States	Record low minimum temperature	3.3 C (37.9 F)	13 of 100 (Routine)
Portland	United States	Record low minimum temperature	7.2 C (45.0 F)	13 of 100 (Routine)
Setauket Strong	United States	Record low minimum temperature	6.7 C (44.1 F)	13 of 100 (Routine)
Atlantic City Marina	United States	Record low maximum temperature	19.4 C (66.9 F)	13 of 100 (Routine)
New Westminster	Canada	Record high maximum temperature	27.8 C (82.0 F)	12 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	-1.1 C (30.0 F)	12 of 100 (Routine)
Middleton (Sar)	South Africa	Record daily precipitation	9.1 mm (0.36 in)	12 of 100 (Routine)
Cullendale	South Africa	Record daily precipitation	13.7 mm (0.5 in)	12 of 100 (Routine)
Wellwood	South Africa	Record daily precipitation	4.6 mm (0.18 in)	12 of 100 (Routine)
Middletown 4 W	United States	Record low minimum temperature	2.8 C (37.0 F)	12 of 100 (Routine)
Vineland	United States	Record low maximum temperature	22.2 C (72.0 F)	12 of 100 (Routine)
Northfield	United States	Record low minimum temperature	0.6 C (33.1 F)	12 of 100 (Routine)
Baltimore Customs House	United States	Record low maximum temperature	21.1 C (70.0 F)	12 of 100 (Routine)
Katberg (Bos)	South Africa	Record daily precipitation	26.7 mm (1.1 in)	11 of 100 (Routine)
Falsterbo	Sweden	Record daily precipitation	10.1 mm (0.4 in)	11 of 100 (Routine)
Harrisburg - Coop	United States	Record daily precipitation	16.5 mm (0.6 in)	11 of 100 (Routine)
Winnemucca AP	United States	Record high minimum temperature	17.2 C (63.0 F)	11 of 100 (Routine)

Counts by Type and Timescale

77 records

Records set or tied on 21 June 1918 by type: Highest daily maximum 1, Lowest daily maximum 13, Highest daily minimum 3, Lowest daily minimum 18, Heaviest daily rainfall 42.

Records on 21 June 1918 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	13
Highest daily minimum	3
Lowest daily minimum	18
Heaviest daily rainfall	42
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 June 1918 by timescale: all-time 0, monthly 0, daily 77.

How Much Records Were Beaten By

75 broken records

Margins by which the 75 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 55.7. Ties are not counted.

Top 20 by Significance

21 June 1918

Top 20 records on 21 June 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 June 1918	Putbus, DE	daily rain	37.3 mm (1.5 in)	27.1 mm (1.1 in)	30 years	55 of 100 (Notable)
21 June 1918	Hogsback (Bos), ZA	daily rain	64.8 mm (2.6 in)	55.7 mm (2.2 in)	3 years	43 of 100 (Notable)
21 June 1918	Bryson City 2, US	daily rain	50.8 mm (2.0 in)	32.5 mm (1.3 in)	16 years	42 of 100 (Notable)
21 June 1918	Pirie (Bos), ZA	daily rain	32.8 mm (1.3 in)	32.0 mm (1.3 in)	26 years	34 of 100 (Routine)
21 June 1918	Dohne (Sar), ZA	daily rain	30.5 mm (1.2 in)	30.5 mm (1.2 in)	35 years	33 of 100 (Routine)
21 June 1918	Komga (Pol), ZA	daily rain	42.2 mm (1.7 in)	36.4 mm (1.4 in)	22 years	33 of 100 (Routine)
21 June 1918	Yarmouth, CA	daily low min	1.1 C (34.0 F)	5.0 C (9.0 F)	29 years	31 of 100 (Routine)
21 June 1918	Toronto, CA	daily low max	15.0 C (59.0 F)	0.6 C (1.1 F)	70 years	29 of 100 (Routine)
21 June 1918	Fredericton Unb, CA	daily low min	0.6 C (33.1 F)	5.5 C (9.9 F)	35 years	29 of 100 (Routine)
21 June 1918	San Diego Wbo, US	daily high min	18.9 C (66.0 F)	2.2 C (4.0 F)	34 years	29 of 100 (Routine)
21 June 1918	George Airport, ZA	daily rain	32.0 mm (1.3 in)	22.6 mm (0.9 in)	26 years	27 of 100 (Routine)
21 June 1918	Bloukrans (Bos), ZA	daily rain	43.2 mm (1.7 in)	36.1 mm (1.4 in)	17 years	27 of 100 (Routine)
21 June 1918	Isidinge (Bos), ZA	daily rain	39.4 mm (1.6 in)	37.4 mm (1.5 in)	15 years	27 of 100 (Routine)
21 June 1918	Charlottetown, CA	daily low min	1.1 C (34.0 F)	5.0 C (9.0 F)	25 years	26 of 100 (Routine)
21 June 1918	Gravenhurst, CA	daily rain	31.2 mm (1.2 in)	13.7 mm (0.5 in)	28 years	25 of 100 (Routine)
21 June 1918	Peterborough, CA	daily low max	13.9 C (57.0 F)	3.9 C (7.0 F)	36 years	24 of 100 (Routine)
21 June 1918	Kei Road (Pol), ZA	daily rain	34.3 mm (1.4 in)	16.8 mm (0.7 in)	36 years	24 of 100 (Routine)
21 June 1918	Lindsay, CA	daily rain	27.2 mm (1.1 in)	10.4 mm (0.4 in)	28 years	23 of 100 (Routine)
21 June 1918	Kaisersbach-Cronhutte, DE	daily rain	28.4 mm (1.1 in)	14.9 mm (0.6 in)	4 years	21 of 100 (Routine)
21 June 1918	Somerset East, ZA	daily rain	23.6 mm (0.9 in)	17.8 mm (0.7 in)	26 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

1802 to 1918

Records set or tied on this calendar date in each year from 1802 to 1918. 1918 had 77 records.

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

Records on 06-21 in each year
Year	Records
1802	1
1803	2
1805	1
1814	1
1821	3
1828	1
1831	1
1839	2
1846	1
1853	1
1855	1
1861	3
1865	1
1868	1
1869	4
1870	3
1871	1
1873	1
1874	1
1875	2
1879	1
1880	1
1881	1
1882	1
1883	1
1884	2
1885	1
1886	3
1887	1
1888	3
1889	1
1891	1
1892	2
1893	7
1895	6
1896	3
1897	3
1898	6
1899	6
1900	6
1901	5
1902	20
1903	15
1904	7
1905	14
1906	19
1907	15
1908	20
1909	19
1910	36
1911	12
1912	14
1913	34
1914	24
1915	40
1916	80
1917	97
1918	77
1919	32
1920	42
1921	85
1922	43
1923	229
1924	124
1925	333
1926	162
1927	146
1928	139
1929	84
1930	177
1931	340
1932	180
1933	645
1934	223
1935	247
1936	642
1937	475
1938	396
1939	250
1940	674
1941	401
1942	340
1943	439
1944	426
1945	709
1946	386
1947	637
1948	392
1949	391
1950	329
1951	347
1952	502
1953	761
1954	501
1955	271
1956	534
1957	932
1958	627
1959	356
1960	471
1961	956
1962	176
1963	667
1964	458
1965	400
1966	467
1967	789
1968	654
1969	687
1970	614
1971	394
1972	934
1973	683
1974	598
1975	996
1976	746
1977	476
1978	368
1979	857
1980	677
1981	889
1982	658
1983	752
1984	913
1985	516
1986	601
1987	940
1988	1,834
1989	856
1990	847
1991	1,067
1992	1,679
1993	939
1994	777
1995	978
1996	1,075
1997	1,037
1998	1,746
1999	994
2000	1,212
2001	658
2002	828
2003	1,034
2004	697
2005	1,090
2006	774
2007	1,085
2008	580
2009	1,060
2010	852
2011	1,340
2012	1,151
2013	571
2014	434
2015	707
2016	877
2017	954
2018	577
2019	969
2020	519
2021	1,132
2022	774
2023	987
2024	679
2025	1,536
2026	736

Download the Data

Data for records on 1918-06-21: 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	55
10 to 20	8
20 to 30	5
30 to 40	6
40 to 50	0
50 to 60	1