Weather Records on 30 June 1927

240 weather records were set or tied worldwide on 30 June 1927. Highest significance: Greeley, US.

Key Facts for 30 June 1927

On 30 June 1927, 240 weather records were set or tied at long-record stations worldwide.
162 were record highs and 53 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 17 monthly and 220 daily.
Greeley set a daily record precipitation of 29.2 mm (1.1 in) on 30 June 1927.
Across 160 earlier years (1826 to 2026) the same calendar date averaged 451 records.

Record Map

240 stations

240 station records on 30 June 1927 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 June 1927: highest significance records shown on the map
Station	Country	Type	Value	Significance
Greeley	United States	Record daily precipitation	29.2 mm (1.1 in)	35 of 100 (Notable)
Oelrichs	United States	Record daily precipitation	61.0 mm (2.4 in)	34 of 100 (Routine)
Steele 4N	United States	Record daily precipitation	39.9 mm (1.6 in)	32 of 100 (Routine)
Orleansville (Chlef)	Algeria	Record high minimum temperature	28.0 C (82.4 F)	30 of 100 (Routine)
Bathurst Gaol	Australia	Record low minimum temperature	-7.2 C (19.0 F)	30 of 100 (Routine)
Los Gatos	United States	Record high minimum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Oakland	United States	Record high minimum temperature	20.0 C (68.0 F)	28 of 100 (Routine)
Abitibi Post	Canada	Record high maximum temperature	37.8 C (100.0 F)	27 of 100 (Routine)
Blagovescensk	Russia	Record daily precipitation	36.3 mm (1.4 in)	27 of 100 (Routine)
Coldwater St School	United States	Record high minimum temperature	29.4 C (84.9 F)	27 of 100 (Routine)
Mont-Aigoual	France	Record daily precipitation	58.0 mm (2.3 in)	26 of 100 (Routine)
Urbana Wrf	United States	Record high minimum temperature	25.6 C (78.1 F)	26 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record high minimum temperature	27.8 C (82.0 F)	26 of 100 (Routine)
Peterborough	Canada	Record high maximum temperature	33.9 C (93.0 F)	24 of 100 (Routine)
Oakdale	United States	Record daily precipitation	33.0 mm (1.3 in)	23 of 100 (Routine)
Toledo Blade	United States	Record high minimum temperature	23.3 C (73.9 F)	23 of 100 (Routine)
Constantine	Algeria	Record high minimum temperature	26.0 C (78.8 F)	21 of 100 (Routine)
Hernando	United States	Record high minimum temperature	26.7 C (80.1 F)	21 of 100 (Routine)
Harnosand	Sweden	Record daily precipitation	22.5 mm (0.9 in)	20 of 100 (Routine)
Bjuraker	Sweden	Record daily precipitation	12.1 mm (0.5 in)	20 of 100 (Routine)
Gysinge	Sweden	Record daily precipitation	17.6 mm (0.7 in)	20 of 100 (Routine)
Gavle	Sweden	Record daily precipitation	20.4 mm (0.8 in)	20 of 100 (Routine)
San Jose	United States	Record high maximum temperature	36.7 C (98.1 F)	20 of 100 (Routine)
Ann Arbor U of Mich	United States	Record high minimum temperature	22.8 C (73.0 F)	20 of 100 (Routine)
World Trade Ctr	United States	Record low maximum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	18.9 C (66.0 F)	20 of 100 (Routine)
Toronto	Canada	Record high maximum temperature	35.0 C (95.0 F)	19 of 100 (Routine)
Medford	United States	Record high minimum temperature	22.8 C (73.0 F)	19 of 100 (Routine)
Lindsay	Canada	Record high maximum temperature	33.9 C (93.0 F)	18 of 100 (Routine)
Old Mission	United States	Record high minimum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Grantsburg	United States	Record high minimum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Ny City Cntrl Park	United States	Record low maximum temperature	20.6 C (69.1 F)	18 of 100 (Routine)
Biskra	Algeria	Record high maximum temperature	44.0 C (111.2 F)	17 of 100 (Routine)
Oakland	United States	Record high maximum temperature	31.7 C (89.1 F)	17 of 100 (Routine)
Waynesville 1 E	United States	Record high maximum temperature	35.0 C (95.0 F)	17 of 100 (Routine)
Medicine Hat A	Canada	Record low maximum temperature	12.8 C (55.0 F)	16 of 100 (Routine)
Vastervik	Sweden	Record low maximum temperature	13.5 C (56.3 F)	16 of 100 (Routine)
Stockton 2	United States	Record high maximum temperature	38.9 C (102.0 F)	16 of 100 (Routine)
Lynchburg - Coop	United States	Record high minimum temperature	25.6 C (78.1 F)	16 of 100 (Routine)
Lexington Bluegrass AP	United States	Record high minimum temperature	24.4 C (75.9 F)	16 of 100 (Routine)
Battleford	Canada	Record low maximum temperature	16.1 C (61.0 F)	15 of 100 (Routine)
Gotska Sandon	Sweden	Record daily precipitation	8.1 mm (0.32 in)	15 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record high minimum temperature	21.7 C (71.1 F)	15 of 100 (Routine)
Tiffin	United States	Record high maximum temperature	36.1 C (97.0 F)	15 of 100 (Routine)
Corvallis State UNIV	United States	Record low minimum temperature	4.4 C (39.9 F)	15 of 100 (Routine)
Dubuque River	United States	Record high minimum temperature	23.3 C (73.9 F)	15 of 100 (Routine)
Kamloops	Canada	Record low minimum temperature	6.1 C (43.0 F)	14 of 100 (Routine)
Andenes	Norway	Record high minimum temperature	15.8 C (60.4 F)	14 of 100 (Routine)
Oktjabrskij-Gorodok	Russia	Record daily precipitation	11.2 mm (0.4 in)	14 of 100 (Routine)
Ulricehamn	Sweden	Record low maximum temperature	12.0 C (53.6 F)	14 of 100 (Routine)
Los Gatos	United States	Record high maximum temperature	36.7 C (98.1 F)	14 of 100 (Routine)
Delta	United States	Record low maximum temperature	25.6 C (78.1 F)	14 of 100 (Routine)
New Ulm 2 SE	United States	Record high minimum temperature	22.2 C (72.0 F)	14 of 100 (Routine)
Pine Rvr Dam	United States	Record high minimum temperature	22.8 C (73.0 F)	14 of 100 (Routine)
Monroe 2 SE	United States	Record high maximum temperature	38.3 C (100.9 F)	14 of 100 (Routine)
Oconto 4 W	United States	Record high minimum temperature	21.7 C (71.1 F)	14 of 100 (Routine)
Philadelphia City	United States	Record low maximum temperature	21.1 C (70.0 F)	14 of 100 (Routine)
Bjuraker	Sweden	Record low maximum temperature	12.0 C (53.6 F)	13 of 100 (Routine)
Norwalk	United States	Record low maximum temperature	22.8 C (73.0 F)	13 of 100 (Routine)
Hillsdale	United States	Record high minimum temperature	22.2 C (72.0 F)	13 of 100 (Routine)

Counts by Type and Timescale

240 records

Records set or tied on 30 June 1927 by type: Highest daily maximum 76, Lowest daily maximum 36, Highest daily minimum 86, Lowest daily minimum 17, Heaviest daily rainfall 25.

Records on 30 June 1927 by type
Record type	Records
Highest daily maximum	76
Lowest daily maximum	36
Highest daily minimum	86
Lowest daily minimum	17
Heaviest daily rainfall	25
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 June 1927 by timescale: all-time 3, monthly 17, daily 220.

How Much Records Were Beaten By

154 broken records

Margins by which the 154 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.6. Ties are not counted.

Top 20 by Significance

30 June 1927

Top 20 records on 30 June 1927 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 1927	Greeley, US	daily rain	29.2 mm (1.1 in)	24.4 mm (1.0 in)	14 years	35 of 100 (Notable)
30 June 1927	Oelrichs, US	daily rain	61.0 mm (2.4 in)	49.6 mm (2.0 in)	4 years	34 of 100 (Routine)
30 June 1927	Steele 4N, US	daily rain	39.9 mm (1.6 in)	32.8 mm (1.3 in)	6 years	32 of 100 (Routine)
30 June 1927	Orleansville (Chlef), DZ	monthly high min	28.0 C (82.4 F)	3.0 C (5.4 F)	26 years	30 of 100 (Routine)
30 June 1927	Bathurst Gaol, AU	daily low min	-7.2 C (19.0 F)	1.6 C (2.9 F)	64 years	30 of 100 (Routine)
30 June 1927	Los Gatos, US	daily high min	17.8 C (64.0 F)	5.0 C (9.0 F)	25 years	29 of 100 (Routine)
30 June 1927	Oakland, US	daily high min	20.0 C (68.0 F)	3.9 C (7.0 F)	5 years	28 of 100 (Routine)
30 June 1927	Abitibi Post, CA	all-time high max	37.8 C (100.0 F)	1.7 C (3.1 F)	5 years	27 of 100 (Routine)
30 June 1927	Blagovescensk, RU	daily rain	36.3 mm (1.4 in)	11.3 mm (0.4 in)	41 years	27 of 100 (Routine)
30 June 1927	Coldwater St School, US	all-time high min	29.4 C (84.9 F)	1.1 C (2.0 F)	8 years	27 of 100 (Routine)
30 June 1927	Mont-Aigoual, FR	daily rain	58.0 mm (2.3 in)	33.0 mm (1.3 in)	21 years	26 of 100 (Routine)
30 June 1927	Urbana Wrf, US	all-time high min	25.6 C (78.1 F)	0.6 C (1.1 F)	8 years	26 of 100 (Routine)
30 June 1927	Traverse Cy Cherry Capital AP, US	monthly high min	27.8 C (82.0 F)	3.4 C (6.1 F)	19 years	26 of 100 (Routine)
30 June 1927	Peterborough, CA	daily high max	33.9 C (93.0 F)	0.6 C (1.1 F)	56 years	24 of 100 (Routine)
30 June 1927	Oakdale, US	daily rain	33.0 mm (1.3 in)	16.7 mm (0.7 in)	29 years	23 of 100 (Routine)
30 June 1927	Toledo Blade, US	daily high min	23.3 C (73.9 F)	1.6 C (2.9 F)	48 years	23 of 100 (Routine)
30 June 1927	Constantine, DZ	daily high min	26.0 C (78.8 F)	4.0 C (7.2 F)	21 years	21 of 100 (Routine)
30 June 1927	Hernando, US	daily high min	26.7 C (80.1 F)	2.8 C (5.0 F)	29 years	21 of 100 (Routine)
30 June 1927	Harnosand, SE	daily rain	22.5 mm (0.9 in)	16.0 mm (0.6 in)	6 years	20 of 100 (Routine)
30 June 1927	Bjuraker, SE	daily rain	12.1 mm (0.5 in)	3.8 mm (0.15 in)	46 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 1927

Records set or tied on this calendar date in each year from 1826 to 1927. 1927 had 240 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 1927-06-30: 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 10	147
10 to 20	3
20 to 30	1
30 to 40	2
40 to 50	1