Weather Records on 20 June 2017

1,086 weather records were set or tied worldwide on 20 June 2017. Highest significance: Koloa Mauka 994, US.

Key Facts for 20 June 2017

On 20 June 2017, 1,086 weather records were set or tied at long-record stations worldwide.
877 were record highs and 56 were record lows, counting maximum and minimum temperature.
By timescale, 14 were all-time records, 50 monthly and 1,022 daily.
Koloa Mauka 994 set a daily record precipitation of 67.1 mm (2.6 in) on 20 June 2017.
Across 158 earlier years (1800 to 2026) the same calendar date averaged 454 records.

Record Map

1,086 stations

1,086 station records on 20 June 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 June 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Koloa Mauka 994	United States	Record daily precipitation	67.1 mm (2.6 in)	69 of 100 (Major)
Graham 2 ENE	United States	Record daily precipitation	104.9 mm (4.1 in)	62 of 100 (Major)
Zhizhgin Mayak	Russia	Record daily precipitation	29.6 mm (1.2 in)	60 of 100 (Major)
Tamar	Australia	Record daily precipitation	45.2 mm (1.8 in)	58 of 100 (Notable)
Gairdner	Australia	Record daily precipitation	32.0 mm (1.3 in)	58 of 100 (Notable)
Bialystok	Poland	Record daily precipitation	54.1 mm (2.1 in)	58 of 100 (Notable)
Boothville ASOS	United States	Record daily precipitation	101.6 mm (4.0 in)	57 of 100 (Notable)
Bremer Bay	Australia	Record daily precipitation	35.6 mm (1.4 in)	56 of 100 (Notable)
Roxboro 7 ESE	United States	Record daily precipitation	72.6 mm (2.9 in)	56 of 100 (Notable)
Zonguldak	Turkey	Record daily precipitation	109.7 mm (4.3 in)	55 of 100 (Notable)
Jackman	United States	Record daily precipitation	41.1 mm (1.6 in)	54 of 100 (Notable)
First Connecticut Lake	United States	Record daily precipitation	45.0 mm (1.8 in)	53 of 100 (Notable)
Bikin	Russia	Record daily precipitation	48.0 mm (1.9 in)	52 of 100 (Notable)
Bourges	France	Record daily precipitation	40.8 mm (1.6 in)	50 of 100 (Notable)
Norfolk 2 SW	United States	Record daily precipitation	61.7 mm (2.4 in)	50 of 100 (Notable)
Houghton Lake 6 WSW	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Calcutta/Alipore	India	Record daily precipitation	94.0 mm (3.7 in)	47 of 100 (Notable)
Lakeport 2	United States	Record daily precipitation	58.9 mm (2.3 in)	47 of 100 (Notable)
Kealakekua 26.2	United States	Record high maximum temperature	28.3 C (82.9 F)	47 of 100 (Notable)
Kirs	Russia	Record daily precipitation	37.2 mm (1.5 in)	46 of 100 (Notable)
Tombstone	United States	Record high minimum temperature	27.2 C (81.0 F)	46 of 100 (Notable)
Woodstock	United States	Record daily precipitation	38.4 mm (1.5 in)	46 of 100 (Notable)
Benxi	China	Record daily precipitation	99.3 mm (3.9 in)	45 of 100 (Notable)
Imlay	United States	Record high minimum temperature	19.4 C (66.9 F)	45 of 100 (Notable)
Henderson 2 NNW	United States	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Armagh	United Kingdom	Record high maximum temperature	26.6 C (79.9 F)	44 of 100 (Notable)
San Manuel	United States	Record high minimum temperature	29.4 C (84.9 F)	44 of 100 (Notable)
Moosehead	United States	Record daily precipitation	35.1 mm (1.4 in)	44 of 100 (Notable)
Sewanee	United States	Record daily precipitation	38.1 mm (1.5 in)	44 of 100 (Notable)
Ely AP	United States	Record high minimum temperature	13.9 C (57.0 F)	44 of 100 (Notable)
Wetumpka	United States	Record low maximum temperature	26.1 C (79.0 F)	43 of 100 (Notable)
Clarksville	United States	Record daily precipitation	48.0 mm (1.9 in)	43 of 100 (Notable)
Wendover AP AWOS	United States	Record high minimum temperature	23.9 C (75.0 F)	43 of 100 (Notable)
San Sebastian - Igueldo	Spain	Record high minimum temperature	22.5 C (72.5 F)	42 of 100 (Notable)
Rothamsted	United Kingdom	Record high maximum temperature	31.5 C (88.7 F)	42 of 100 (Notable)
Lemon Cove	United States	Record high minimum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Napa State Hospital	United States	Record high minimum temperature	16.7 C (62.1 F)	42 of 100 (Notable)
Paso Robles	United States	Record high minimum temperature	17.2 C (63.0 F)	42 of 100 (Notable)
Barkhamsted	United States	Record daily precipitation	43.2 mm (1.7 in)	42 of 100 (Notable)
Monroe 2 SE	United States	Record daily precipitation	87.6 mm (3.4 in)	42 of 100 (Notable)
Hanford 1 S	United States	Record high minimum temperature	26.1 C (79.0 F)	41 of 100 (Notable)
Saint Helena	United States	Record high minimum temperature	18.3 C (64.9 F)	41 of 100 (Notable)
Middleboro	United States	Record high minimum temperature	18.9 C (66.0 F)	41 of 100 (Notable)
Elko Rgnl AP	United States	Record high maximum temperature	37.2 C (99.0 F)	41 of 100 (Notable)
Willcox	United States	Record high minimum temperature	22.8 C (73.0 F)	40 of 100 (Notable)
Canyon Dam	United States	Record high maximum temperature	35.0 C (95.0 F)	40 of 100 (Notable)
Yreka	United States	Record high maximum temperature	39.4 C (102.9 F)	40 of 100 (Notable)
Lumberton	United States	Record high minimum temperature	24.4 C (75.9 F)	40 of 100 (Notable)
Duchesne	United States	Record high minimum temperature	16.1 C (61.0 F)	40 of 100 (Notable)
Auke Bay	United States	Record daily precipitation	38.1 mm (1.5 in)	40 of 100 (Notable)
Narrogin	Australia	Record high maximum temperature	21.4 C (70.5 F)	39 of 100 (Notable)
Moncegorsk	Russia	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Umba	Russia	Record daily precipitation	25.6 mm (1.0 in)	39 of 100 (Notable)
Barcelona/Aeropuerto	Spain	Record high minimum temperature	22.8 C (73.0 F)	39 of 100 (Notable)
Wellesbourne	United Kingdom	Record high maximum temperature	32.3 C (90.1 F)	39 of 100 (Notable)
Wisley	United Kingdom	Record high maximum temperature	33.3 C (91.9 F)	39 of 100 (Notable)
Saint Johns	United States	Record high maximum temperature	38.9 C (102.0 F)	39 of 100 (Notable)
Burlington	United States	Record daily precipitation	36.6 mm (1.4 in)	39 of 100 (Notable)
Surry Mtn Lake	United States	Record daily precipitation	53.3 mm (2.1 in)	39 of 100 (Notable)
Rosalia	United States	Record high minimum temperature	16.1 C (61.0 F)	39 of 100 (Notable)

Counts by Type and Timescale

1,086 records

Records set or tied on 20 June 2017 by type: Highest daily maximum 442, Lowest daily maximum 29, Highest daily minimum 435, Lowest daily minimum 27, Heaviest daily rainfall 153.

Records on 20 June 2017 by type
Record type	Records
Highest daily maximum	442
Lowest daily maximum	29
Highest daily minimum	435
Lowest daily minimum	27
Heaviest daily rainfall	153
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 June 2017 by timescale: all-time 14, monthly 50, daily 1,022.

How Much Records Were Beaten By

857 broken records

Margins by which the 857 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.7. Ties are not counted.

Top 20 by Significance

20 June 2017

Top 20 records on 20 June 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 June 2017	Koloa Mauka 994, US	daily rain	67.1 mm (2.6 in)	48.8 mm (1.9 in)	74 years	69 of 100 (Major)
20 June 2017	Graham 2 ENE, US	daily rain	104.9 mm (4.1 in)	42.7 mm (1.7 in)	71 years	62 of 100 (Major)
20 June 2017	Zhizhgin Mayak, RU	daily rain	29.6 mm (1.2 in)	13.5 mm (0.5 in)	76 years	60 of 100 (Major)
20 June 2017	Tamar, AU	daily rain	45.2 mm (1.8 in)	23.4 mm (0.9 in)	70 years	58 of 100 (Notable)
20 June 2017	Gairdner, AU	daily rain	32.0 mm (1.3 in)	21.8 mm (0.9 in)	52 years	58 of 100 (Notable)
20 June 2017	Bialystok, PL	daily rain	54.1 mm (2.1 in)	40.1 mm (1.6 in)	43 years	58 of 100 (Notable)
20 June 2017	Boothville ASOS, US	daily rain	101.6 mm (4.0 in)	66.0 mm (2.6 in)	40 years	57 of 100 (Notable)
20 June 2017	Bremer Bay, AU	daily rain	35.6 mm (1.4 in)	14.0 mm (0.6 in)	100 years	56 of 100 (Notable)
20 June 2017	Roxboro 7 ESE, US	daily rain	72.6 mm (2.9 in)	31.2 mm (1.2 in)	79 years	56 of 100 (Notable)
20 June 2017	Zonguldak, TR	daily rain	109.7 mm (4.3 in)	91.7 mm (3.6 in)	32 years	55 of 100 (Notable)
20 June 2017	Jackman, US	daily rain	41.1 mm (1.6 in)	19.5 mm (0.8 in)	74 years	54 of 100 (Notable)
20 June 2017	First Connecticut Lake, US	daily rain	45.0 mm (1.8 in)	22.1 mm (0.9 in)	72 years	53 of 100 (Notable)
20 June 2017	Bikin, RU	daily rain	48.0 mm (1.9 in)	24.0 mm (0.9 in)	40 years	52 of 100 (Notable)
20 June 2017	Bourges, FR	daily rain	40.8 mm (1.6 in)	16.3 mm (0.6 in)	63 years	50 of 100 (Notable)
20 June 2017	Norfolk 2 SW, US	daily rain	61.7 mm (2.4 in)	23.6 mm (0.9 in)	72 years	50 of 100 (Notable)
20 June 2017	Houghton Lake 6 WSW, US	daily rain	50.8 mm (2.0 in)	16.5 mm (0.6 in)	78 years	49 of 100 (Notable)
20 June 2017	Calcutta/Alipore, IN	daily rain	94.0 mm (3.7 in)	24.4 mm (1.0 in)	92 years	47 of 100 (Notable)
20 June 2017	Lakeport 2, US	daily rain	58.9 mm (2.3 in)	18.0 mm (0.7 in)	74 years	47 of 100 (Notable)
20 June 2017	Kealakekua 26.2, US	daily high max	28.3 C (82.9 F)	1.1 C (2.0 F)	110 years	47 of 100 (Notable)
20 June 2017	Kirs, RU	daily rain	37.2 mm (1.5 in)	19.7 mm (0.8 in)	40 years	46 of 100 (Notable)

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

1800 to 2017

Records set or tied on this calendar date in each year from 1800 to 2017. 2017 had 1,086 records.

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

Records on 06-20 in each year
Year	Records
1800	1
1803	1
1813	1
1821	2
1838	1
1839	1
1841	1
1844	1
1846	2
1847	1
1850	1
1855	2
1857	1
1861	1
1865	2
1867	1
1869	2
1872	1
1873	1
1877	2
1879	1
1884	1
1886	2
1887	2
1891	2
1892	2
1893	2
1895	4
1896	3
1897	6
1898	3
1899	6
1900	4
1901	5
1902	7
1903	22
1904	13
1905	14
1906	18
1907	10
1908	30
1909	9
1910	27
1911	27
1912	17
1913	30
1914	53
1915	75
1916	83
1917	96
1918	54
1919	67
1920	40
1921	42
1922	61
1923	263
1924	204
1925	483
1926	228
1927	193
1928	199
1929	137
1930	143
1931	536
1932	182
1933	676
1934	301
1935	337
1936	529
1937	412
1938	326
1939	270
1940	469
1941	200
1942	757
1943	447
1944	315
1945	769
1946	849
1947	387
1948	554
1949	314
1950	328
1951	289
1952	318
1953	998
1954	414
1955	291
1956	484
1957	598
1958	603
1959	504
1960	451
1961	836
1962	173
1963	379
1964	729
1965	463
1966	441
1967	687
1968	559
1969	982
1970	482
1971	395
1972	660
1973	553
1974	743
1975	984
1976	899
1977	453
1978	480
1979	727
1980	922
1981	987
1982	801
1983	724
1984	686
1985	811
1986	732
1987	960
1988	1,222
1989	918
1990	899
1991	1,085
1992	1,049
1993	964
1994	925
1995	1,260
1996	1,123
1997	738
1998	1,627
1999	906
2000	1,328
2001	771
2002	955
2003	843
2004	1,071
2005	1,055
2006	820
2007	1,208
2008	669
2009	1,060
2010	865
2011	1,359
2012	1,045
2013	879
2014	381
2015	637
2016	1,352
2017	1,086
2018	635
2019	693
2020	590
2021	1,161
2022	972
2023	1,265
2024	783
2025	944
2026	757

Download the Data

Data for records on 2017-06-20: 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	833
20 to 40	16
40 to 60	5
60 to 80	2
80 to 100	1