Weather Records on 28 June 1917

20 weather records were set or tied worldwide on 28 June 1917. Highest significance: Cottam, CA.

Key Facts for 28 June 1917

On 28 June 1917, 20 weather records were set or tied at long-record stations worldwide.
2 were record highs and 4 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 20 daily.
Cottam set a daily record precipitation of 64.8 mm (2.6 in) on 28 June 1917.
Across 158 earlier years (1815 to 2026) the same calendar date averaged 471 records.

Record Map

20 stations

20 station records on 28 June 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 28 June 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cottam	Canada	Record daily precipitation	64.8 mm (2.6 in)	51 of 100 (Notable)
Kerkwerve	Netherlands	Record daily precipitation	28.0 mm (1.1 in)	24 of 100 (Routine)
Vasteras-Hasslo	Sweden	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Chatham 2	Canada	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Toledo Blade	United States	Record daily precipitation	31.0 mm (1.2 in)	19 of 100 (Routine)
New Westminster	Canada	Record daily precipitation	27.2 mm (1.1 in)	17 of 100 (Routine)
Bird Rocks	Canada	Record daily precipitation	20.3 mm (0.8 in)	16 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record low maximum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Milwaukee Wb City	United States	Record daily precipitation	17.3 mm (0.7 in)	13 of 100 (Routine)
Barmah East	Australia	Record daily precipitation	6.4 mm (0.25 in)	12 of 100 (Routine)
Scheveningen	Netherlands	Record daily precipitation	13.8 mm (0.5 in)	12 of 100 (Routine)
Olympia Priest Pt Park	United States	Record daily precipitation	8.1 mm (0.32 in)	12 of 100 (Routine)
Simferopol	Ukraine	Record high minimum temperature	18.3 C (64.9 F)	11 of 100 (Routine)
Stromsfoss Sluse	Norway	Record daily precipitation	7.9 mm (0.31 in)	10 of 100 (Routine)
Uccle	Belgium	Record daily precipitation	14.2 mm (0.6 in)	7 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	19.4 C (66.9 F)	5 of 100 (Routine)
Halden	Norway	Record daily precipitation	12.0 mm (0.5 in)	4 of 100 (Routine)
San Diego Wbo	United States	Record low minimum temperature	13.3 C (55.9 F)	3 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	17.8 C (64.0 F)	1 of 100 (Routine)
Greenville Dwtn AP	United States	Record high maximum temperature	35.6 C (96.1 F)	0 of 100 (Routine)

Counts by Type and Timescale

20 records

Records set or tied on 28 June 1917 by type: Highest daily maximum 1, Lowest daily maximum 3, Highest daily minimum 1, Lowest daily minimum 1, Heaviest daily rainfall 14.

Records on 28 June 1917 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	3
Highest daily minimum	1
Lowest daily minimum	1
Heaviest daily rainfall	14
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 28 June 1917 by timescale: all-time 0, monthly 0, daily 20.

How Much Records Were Beaten By

16 broken records

Margins by which the 16 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 47.3. Ties are not counted.

Top 20 by Significance

28 June 1917

Top 20 records on 28 June 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 June 1917	Cottam, CA	daily rain	64.8 mm (2.6 in)	47.3 mm (1.9 in)	28 years	51 of 100 (Notable)
28 June 1917	Kerkwerve, NL	daily rain	28.0 mm (1.1 in)	10.5 mm (0.4 in)	8 years	24 of 100 (Routine)
28 June 1917	Vasteras-Hasslo, SE	daily rain	19.8 mm (0.8 in)	11.3 mm (0.4 in)	12 years	20 of 100 (Routine)
28 June 1917	Chatham 2, CA	daily rain	23.1 mm (0.9 in)	11.7 mm (0.5 in)	22 years	20 of 100 (Routine)
28 June 1917	Toledo Blade, US	daily rain	31.0 mm (1.2 in)	9.2 mm (0.36 in)	22 years	19 of 100 (Routine)
28 June 1917	New Westminster, CA	daily rain	27.2 mm (1.1 in)	6.1 mm (0.24 in)	22 years	17 of 100 (Routine)
28 June 1917	Bird Rocks, CA	daily rain	20.3 mm (0.8 in)	6.3 mm (0.25 in)	22 years	16 of 100 (Routine)
28 June 1917	Wagga Wagga (Kooringal), AU	daily low max	8.9 C (48.0 F)	0.3 C (0.5 F)	35 years	15 of 100 (Routine)
28 June 1917	Milwaukee Wb City, US	daily rain	17.3 mm (0.7 in)	1.6 mm (0.06 in)	28 years	13 of 100 (Routine)
28 June 1917	Barmah East, AU	daily rain	6.4 mm (0.25 in)	2.1 mm (0.08 in)	25 years	12 of 100 (Routine)
28 June 1917	Scheveningen, NL	daily rain	13.8 mm (0.5 in)	2.9 mm (0.11 in)	11 years	12 of 100 (Routine)
28 June 1917	Olympia Priest Pt Park, US	daily rain	8.1 mm (0.32 in)	0.5 mm (0.02 in)	27 years	12 of 100 (Routine)
28 June 1917	Simferopol, UA	daily high min	18.3 C (64.9 F)	0.6 C (1.1 F)	24 years	11 of 100 (Routine)
28 June 1917	Stromsfoss Sluse, NO	daily rain	7.9 mm (0.31 in)	2.4 mm (0.09 in)	10 years	10 of 100 (Routine)
28 June 1917	Uccle, BE	daily rain	14.2 mm (0.6 in)	2.4 mm (0.09 in)	4 years	7 of 100 (Routine)
28 June 1917	Hamilton, CA	daily low max (Tie)	19.4 C (66.9 F)	tie	50 years	5 of 100 (Routine)
28 June 1917	Halden, NO	daily rain	12.0 mm (0.5 in)	0.7 mm (0.03 in)	0 years	4 of 100 (Routine)
28 June 1917	San Diego Wbo, US	daily low min (Tie)	13.3 C (55.9 F)	tie	26 years	3 of 100 (Routine)
28 June 1917	Lucknow, CA	daily low max (Tie)	17.8 C (64.0 F)	tie	6 years	1 of 100 (Routine)
28 June 1917	Greenville Dwtn AP, US	daily high max (Tie)	35.6 C (96.1 F)	tie	3 years	0 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

1815 to 1917

Records set or tied on this calendar date in each year from 1815 to 1917. 1917 had 20 records.

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

Records on 06-28 in each year
Year	Records
1815	1
1823	1
1824	1
1827	1
1834	1
1835	2
1840	1
1841	1
1857	1
1860	1
1861	2
1862	1
1863	1
1864	1
1865	1
1867	1
1876	2
1878	1
1879	1
1880	1
1884	1
1887	3
1888	4
1889	2
1890	5
1891	1
1892	4
1893	5
1895	1
1896	2
1898	3
1899	2
1900	2
1901	19
1902	8
1903	2
1904	12
1905	19
1906	24
1907	12
1908	10
1909	26
1910	51
1911	30
1912	21
1913	57
1914	50
1915	64
1916	99
1917	20
1918	46
1919	69
1920	146
1921	68
1922	45
1923	222
1924	105
1925	168
1926	335
1927	256
1928	176
1929	146
1930	195
1931	843
1932	218
1933	475
1934	594
1935	332
1936	556
1937	378
1938	591
1939	333
1940	256
1941	454
1942	570
1943	422
1944	386
1945	489
1946	401
1947	818
1948	435
1949	316
1950	340
1951	420
1952	685
1953	293
1954	427
1955	369
1956	582
1957	636
1958	749
1959	647
1960	290
1961	405
1962	333
1963	672
1964	328
1965	363
1966	394
1967	398
1968	1,286
1969	961
1970	897
1971	629
1972	503
1973	696
1974	953
1975	611
1976	661
1977	397
1978	797
1979	542
1980	1,754
1981	870
1982	737
1983	1,336
1984	448
1985	1,223
1986	657
1987	615
1988	1,224
1989	736
1990	1,006
1991	1,389
1992	1,306
1993	753
1994	1,209
1995	959
1996	1,094
1997	860
1998	1,271
1999	1,348
2000	1,297
2001	712
2002	1,020
2003	748
2004	965
2005	995
2006	1,051
2007	1,086
2008	554
2009	839
2010	1,186
2011	1,051
2012	1,204
2013	934
2014	695
2015	1,257
2016	424
2017	595
2018	711
2019	685
2020	915
2021	1,472
2022	853
2023	619
2024	694
2025	454
2026	1,942

Download the Data

Data for records on 1917-06-28: 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).

Histogram of margins by which records were beaten on 28 June 1917
Margin	Records
0 to 10	12
10 to 20	3
20 to 30	0
30 to 40	0
40 to 50	1