Weather Records on 30 June 1918

54 weather records were set or tied worldwide on 30 June 1918. Highest significance: Peterborough, CA.

Key Facts for 30 June 1918

On 30 June 1918, 54 weather records were set or tied at long-record stations worldwide.
3 were record highs and 24 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 1 monthly and 52 daily.
Peterborough set an all-time record daily precipitation of 83.6 mm (3.3 in) on 30 June 1918.
Across 160 earlier years (1826 to 2026) the same calendar date averaged 452 records.

Record Map

54 stations

54 station records on 30 June 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 June 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Peterborough	Canada	Record daily precipitation	83.6 mm (3.3 in)	38 of 100 (Notable)
Brantford	Canada	Record daily precipitation	38.1 mm (1.5 in)	36 of 100 (Notable)
Praha-Klementinum	Czech Republic	Record low maximum temperature	14.5 C (58.1 F)	34 of 100 (Routine)
Robe Comparison	Australia	Record daily precipitation	49.3 mm (1.9 in)	31 of 100 (Routine)
Colac Botanical Gardens	Australia	Record daily precipitation	27.9 mm (1.1 in)	28 of 100 (Routine)
Escanaba	United States	Record low maximum temperature	12.2 C (54.0 F)	24 of 100 (Routine)
Stony Mountain	Canada	Record low maximum temperature	12.2 C (54.0 F)	22 of 100 (Routine)
Owen Sound	Canada	Record daily precipitation	25.9 mm (1.0 in)	22 of 100 (Routine)
Lucknow	Canada	Record daily precipitation	31.0 mm (1.2 in)	21 of 100 (Routine)
Shelford	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Cundare South	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Lilydale	Australia	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Haliburton A	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Caulfield (Racecourse)	Australia	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Murrumbeena Leeds Grove	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
Calivil	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Kew	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Hamilton	Canada	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Lenoir	United States	Record daily precipitation	20.6 mm (0.8 in)	20 of 100 (Routine)
Tashkent	Uzbekistan	Record high minimum temperature	23.1 C (73.6 F)	19 of 100 (Routine)
Southampton	Canada	Record daily precipitation	23.4 mm (0.9 in)	18 of 100 (Routine)
Greensborough	Australia	Record daily precipitation	14.2 mm (0.6 in)	17 of 100 (Routine)
Myrniong	Australia	Record daily precipitation	20.3 mm (0.8 in)	16 of 100 (Routine)
Ft Bidwell	United States	Record high maximum temperature	34.4 C (93.9 F)	16 of 100 (Routine)
Dubuque River	United States	Record daily precipitation	28.4 mm (1.1 in)	15 of 100 (Routine)
Ocean Grove	Australia	Record daily precipitation	14.5 mm (0.6 in)	14 of 100 (Routine)
Watford	Canada	Record daily precipitation	24.9 mm (1.0 in)	14 of 100 (Routine)
Koebenhavn: Landbohojskolen-1	Denmark	Record low minimum temperature	5.9 C (42.6 F)	14 of 100 (Routine)
Freiburg	Germany	Record low minimum temperature	8.4 C (47.1 F)	13 of 100 (Routine)
Tranebjerg	Denmark	Record low minimum temperature	7.2 C (45.0 F)	12 of 100 (Routine)
Berlin-Dahlem	Germany	Record low minimum temperature	8.5 C (47.3 F)	12 of 100 (Routine)
Plauen	Germany	Record low maximum temperature	13.2 C (55.8 F)	12 of 100 (Routine)
Alexandra (Post Office)	Australia	Record daily precipitation	16.5 mm (0.6 in)	11 of 100 (Routine)
Medicine Hat A	Canada	Record low minimum temperature	5.6 C (42.1 F)	11 of 100 (Routine)
Moose Factory	Canada	Record low maximum temperature	8.3 C (46.9 F)	11 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record low minimum temperature	11.7 C (53.1 F)	11 of 100 (Routine)
Ringwood 2	Australia	Record daily precipitation	19.6 mm (0.8 in)	10 of 100 (Routine)
Stony Mountain	Canada	Record low minimum temperature	5.0 C (41.0 F)	10 of 100 (Routine)
Wiarton	Canada	Record daily precipitation	22.1 mm (0.9 in)	10 of 100 (Routine)
Newport	United States	Record low maximum temperature	23.9 C (75.0 F)	10 of 100 (Routine)
Concordia ASOS	United States	Record low minimum temperature	11.7 C (53.1 F)	9 of 100 (Routine)
Green Bay	United States	Record low maximum temperature	15.0 C (59.0 F)	9 of 100 (Routine)
Moose Factory	Canada	Record low minimum temperature	-1.1 C (30.0 F)	8 of 100 (Routine)
Halmstad	Sweden	Record low minimum temperature	5.5 C (41.9 F)	8 of 100 (Routine)
Green Bay	United States	Record daily precipitation	30.7 mm (1.2 in)	8 of 100 (Routine)
Sandvig	Denmark	Record low minimum temperature	9.8 C (49.6 F)	6 of 100 (Routine)
Belle Isle	Canada	Record low minimum temperature	-1.1 C (30.0 F)	5 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record low minimum temperature	5.2 C (41.4 F)	5 of 100 (Routine)
Madison Wb City	United States	Record low maximum temperature	17.8 C (64.0 F)	3 of 100 (Routine)
Anticosti SW Point	Canada	Record high maximum temperature	20.6 C (69.1 F)	2 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record low minimum temperature	6.7 C (44.1 F)	2 of 100 (Routine)
Milwaukee Wb City	United States	Record low maximum temperature	18.3 C (64.9 F)	2 of 100 (Routine)
Sonnblick	Austria	Record low maximum temperature	-3.7 C (25.3 F)	1 of 100 (Routine)

Counts by Type and Timescale

54 records

Records set or tied on 30 June 1918 by type: Highest daily maximum 2, Lowest daily maximum 10, Highest daily minimum 1, Lowest daily minimum 14, Heaviest daily rainfall 27.

Records on 30 June 1918 by type
Record type	Records
Highest daily maximum	2
Lowest daily maximum	10
Highest daily minimum	1
Lowest daily minimum	14
Heaviest daily rainfall	27
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 June 1918 by timescale: all-time 1, monthly 1, daily 52.

How Much Records Were Beaten By

49 broken records

Margins by which the 49 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 25.7. Ties are not counted.

Top 20 by Significance

30 June 1918

Top 20 records on 30 June 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 1918	Peterborough, CA	all-time rain	83.6 mm (3.3 in)	2.3 mm (0.09 in)	39 years	38 of 100 (Notable)
30 June 1918	Brantford, CA	daily rain	38.1 mm (1.5 in)	25.7 mm (1.0 in)	25 years	36 of 100 (Notable)
30 June 1918	Praha-Klementinum, CZ	daily low max	14.5 C (58.1 F)	0.4 C (0.7 F)	82 years	34 of 100 (Routine)
30 June 1918	Robe Comparison, AU	monthly rain	49.3 mm (1.9 in)	8.2 mm (0.32 in)	10 years	31 of 100 (Routine)
30 June 1918	Colac Botanical Gardens, AU	daily rain	27.9 mm (1.1 in)	12.4 mm (0.5 in)	21 years	28 of 100 (Routine)
30 June 1918	Escanaba, US	daily low max	12.2 C (54.0 F)	4.5 C (8.1 F)	35 years	24 of 100 (Routine)
30 June 1918	Stony Mountain, CA	daily low max	12.2 C (54.0 F)	5.6 C (10.1 F)	26 years	22 of 100 (Routine)
30 June 1918	Owen Sound, CA	daily rain	25.9 mm (1.0 in)	11.2 mm (0.4 in)	19 years	22 of 100 (Routine)
30 June 1918	Lucknow, CA	daily rain	31.0 mm (1.2 in)	9.7 mm (0.38 in)	20 years	21 of 100 (Routine)
30 June 1918	Shelford, AU	daily rain	23.4 mm (0.9 in)	15.8 mm (0.6 in)	28 years	20 of 100 (Routine)
30 June 1918	Cundare South, AU	daily rain	23.6 mm (0.9 in)	17.0 mm (0.7 in)	18 years	20 of 100 (Routine)
30 June 1918	Nikolaevsk-Na-Amure, RU	daily rain	23.6 mm (0.9 in)	13.4 mm (0.5 in)	34 years	20 of 100 (Routine)
30 June 1918	Lilydale, AU	daily rain	23.9 mm (0.9 in)	11.5 mm (0.5 in)	18 years	20 of 100 (Routine)
30 June 1918	Haliburton A, CA	daily rain	20.3 mm (0.8 in)	11.4 mm (0.4 in)	34 years	20 of 100 (Routine)
30 June 1918	Caulfield (Racecourse), AU	daily rain	17.5 mm (0.7 in)	7.1 mm (0.28 in)	28 years	20 of 100 (Routine)
30 June 1918	Murrumbeena Leeds Grove, AU	daily rain	16.3 mm (0.6 in)	6.1 mm (0.24 in)	28 years	20 of 100 (Routine)
30 June 1918	Calivil, AU	daily rain	12.7 mm (0.5 in)	6.9 mm (0.27 in)	26 years	20 of 100 (Routine)
30 June 1918	Kew, AU	daily rain	22.1 mm (0.9 in)	2.5 mm (0.10 in)	45 years	20 of 100 (Routine)
30 June 1918	Hamilton, CA	daily rain	24.6 mm (1.0 in)	5.5 mm (0.22 in)	35 years	20 of 100 (Routine)
30 June 1918	Lenoir, US	daily rain	20.6 mm (0.8 in)	5.4 mm (0.21 in)	43 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

1826 to 1918

Records set or tied on this calendar date in each year from 1826 to 1918. 1918 had 54 records.

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

Records on 06-30 in each year
Year	Records
1826	1
1832	1
1835	2
1843	2
1846	1
1848	2
1849	1
1853	1
1855	1
1857	1
1860	1
1863	1
1865	1
1869	1
1871	1
1873	1
1876	1
1879	2
1882	2
1883	3
1885	4
1886	1
1887	2
1888	2
1889	1
1890	3
1891	2
1892	1
1894	1
1895	1
1896	2
1897	6
1898	3
1899	4
1900	5
1901	9
1902	10
1903	8
1904	20
1905	23
1906	20
1907	12
1908	17
1909	39
1910	57
1911	12
1912	32
1913	99
1914	97
1915	40
1916	66
1917	39
1918	54
1919	72
1920	319
1921	121
1922	133
1923	309
1924	194
1925	113
1926	65
1927	240
1928	137
1929	213
1930	168
1931	774
1932	154
1933	571
1934	331
1935	347
1936	620
1937	458
1938	330
1939	438
1940	346
1941	341
1942	408
1943	790
1944	272
1945	671
1946	631
1947	487
1948	340
1949	403
1950	494
1951	517
1952	533
1953	404
1954	426
1955	432
1956	409
1957	592
1958	423
1959	948
1960	270
1961	351
1962	375
1963	560
1964	434
1965	240
1966	379
1967	414
1968	752
1969	459
1970	730
1971	459
1972	558
1973	623
1974	643
1975	414
1976	607
1977	662
1978	721
1979	601
1980	935
1981	838
1982	1,230
1983	752
1984	722
1985	829
1986	745
1987	1,044
1988	1,216
1989	953
1990	1,191
1991	1,129
1992	1,670
1993	711
1994	951
1995	1,354
1996	889
1997	938
1998	1,714
1999	910
2000	861
2001	778
2002	904
2003	896
2004	998
2005	1,526
2006	723
2007	736
2008	852
2009	1,052
2010	1,069
2011	1,057
2012	1,416
2013	963
2014	496
2015	1,018
2016	371
2017	642
2018	625
2019	1,042
2020	1,151
2021	1,442
2022	709
2023	531
2024	1,004
2025	858
2026	999

Download the Data

Data for records on 1918-06-30: 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 5	27
5 to 10	14
10 to 15	5
15 to 20	2
20 to 25	0
25 to 30	1