Weather Records on 30 June 1984

722 weather records were set or tied worldwide on 30 June 1984. Highest significance: Tucson Magnetic Obsy, US.

Key Facts for 30 June 1984

On 30 June 1984, 722 weather records were set or tied at long-record stations worldwide.
159 were record highs and 293 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 23 monthly and 697 daily.
Tucson Magnetic Obsy set a daily record precipitation of 30.2 mm (1.2 in) on 30 June 1984.
Across 160 earlier years (1826 to 2026) the same calendar date averaged 448 records.

Record Map

722 stations

722 station records on 30 June 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 June 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tucson Magnetic Obsy	United States	Record daily precipitation	30.2 mm (1.2 in)	66 of 100 (Major)
Centerville	United States	Record daily precipitation	85.6 mm (3.4 in)	57 of 100 (Notable)
Buffalo	United States	Record daily precipitation	118.1 mm (4.6 in)	56 of 100 (Notable)
Ny City Cntrl Park	United States	Record daily precipitation	78.0 mm (3.1 in)	56 of 100 (Notable)
Jewett	United States	Record daily precipitation	73.7 mm (2.9 in)	55 of 100 (Notable)
Ball Ground	United States	Record daily precipitation	125.2 mm (4.9 in)	54 of 100 (Notable)
Walnut Grove	United States	Record daily precipitation	48.3 mm (1.9 in)	53 of 100 (Notable)
Bon Wier	United States	Record daily precipitation	100.3 mm (3.9 in)	52 of 100 (Notable)
Andrews	United States	Record daily precipitation	44.7 mm (1.8 in)	51 of 100 (Notable)
Pyramid	United States	Record daily precipitation	33.8 mm (1.3 in)	49 of 100 (Notable)
Indian Mills 2 W	United States	Record daily precipitation	62.5 mm (2.5 in)	49 of 100 (Notable)
Norrkoping-Sorby	Sweden	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Mineola	United States	Record daily precipitation	109.2 mm (4.3 in)	48 of 100 (Notable)
Hico	United States	Record low minimum temperature	10.0 C (50.0 F)	47 of 100 (Notable)
Darrington Rs	United States	Record daily precipitation	29.2 mm (1.1 in)	47 of 100 (Notable)
Talon	Russia	Record daily precipitation	51.3 mm (2.0 in)	46 of 100 (Notable)
Salisbury	United States	Record daily precipitation	52.1 mm (2.1 in)	46 of 100 (Notable)
Albany 3 SE	United States	Record daily precipitation	75.4 mm (3.0 in)	45 of 100 (Notable)
Teriberka	Russia	Record daily precipitation	32.4 mm (1.3 in)	43 of 100 (Notable)
Arivaca	United States	Record daily precipitation	35.1 mm (1.4 in)	43 of 100 (Notable)
Tangier Island	United States	Record daily precipitation	87.4 mm (3.4 in)	43 of 100 (Notable)
New Iberia AP - Acadiana Rgnl	United States	Record low maximum temperature	24.4 C (75.9 F)	42 of 100 (Notable)
New Iberia AP - Acadiana Rgnl	United States	Record daily precipitation	68.6 mm (2.7 in)	42 of 100 (Notable)
Richards	United States	Record daily precipitation	90.2 mm (3.6 in)	42 of 100 (Notable)
Westchester Co AP	United States	Record daily precipitation	65.0 mm (2.6 in)	42 of 100 (Notable)
Cullowhee	United States	Record daily precipitation	53.8 mm (2.1 in)	41 of 100 (Notable)
Poljarnoe	Russia	Record daily precipitation	46.2 mm (1.8 in)	40 of 100 (Notable)
Lakehurst AP	United States	Record daily precipitation	85.9 mm (3.4 in)	40 of 100 (Notable)
Grand Coteau	United States	Record low maximum temperature	27.8 C (82.0 F)	39 of 100 (Notable)
Tonichi	Mexico	Record daily precipitation	59.9 mm (2.4 in)	38 of 100 (Notable)
Nikolaevsk-Na-Amure	Russia	Record daily precipitation	29.1 mm (1.1 in)	38 of 100 (Notable)
Crockett	United States	Record daily precipitation	70.6 mm (2.8 in)	38 of 100 (Notable)
Kipling 4 NNW	United States	Record daily precipitation	58.2 mm (2.3 in)	37 of 100 (Notable)
Billings Wtp	United States	Record high maximum temperature	39.4 C (102.9 F)	37 of 100 (Notable)
Lindley 2N	United States	Record daily precipitation	67.1 mm (2.6 in)	37 of 100 (Notable)
Yurecuaro	Mexico	Record low maximum temperature	20.6 C (69.1 F)	36 of 100 (Notable)
Juchitan de Zaragoza	Mexico	Record low minimum temperature	16.7 C (62.1 F)	36 of 100 (Notable)
Alliance 1WNW	United States	Record daily precipitation	27.9 mm (1.1 in)	36 of 100 (Notable)
Long Pond Pocono Lake	United States	Record daily precipitation	92.7 mm (3.6 in)	36 of 100 (Notable)
Selby	United States	Record daily precipitation	36.1 mm (1.4 in)	36 of 100 (Notable)
Lafayette Rgnl AP	United States	Record low maximum temperature	26.1 C (79.0 F)	36 of 100 (Notable)
Navojoa	Mexico	Record daily precipitation	53.1 mm (2.1 in)	35 of 100 (Notable)
Gainesville	United States	Record daily precipitation	36.8 mm (1.4 in)	35 of 100 (Notable)
Oakland 1 SE	United States	Record daily precipitation	34.5 mm (1.4 in)	35 of 100 (Notable)
Mocksville 5SE	United States	Record daily precipitation	29.0 mm (1.1 in)	35 of 100 (Notable)
Laurelville	United States	Record daily precipitation	57.7 mm (2.3 in)	35 of 100 (Notable)
Bruceton 1 S	United States	Record daily precipitation	47.8 mm (1.9 in)	35 of 100 (Notable)
Hamburg	United States	Record daily precipitation	28.4 mm (1.1 in)	35 of 100 (Notable)
Ferron	United States	Record high maximum temperature	35.0 C (95.0 F)	35 of 100 (Notable)
Trout Dale 3 SSE	United States	Record daily precipitation	80.0 mm (3.1 in)	35 of 100 (Notable)
Kremsmuenster	Austria	Record low minimum temperature	7.7 C (45.9 F)	34 of 100 (Routine)
San Juan de Los Llanos	Mexico	Record low minimum temperature	3.9 C (39.0 F)	34 of 100 (Routine)
Fayetteville Exp STN	United States	Record low minimum temperature	5.6 C (42.1 F)	34 of 100 (Routine)
Princeton	United States	Record low minimum temperature	12.2 C (54.0 F)	34 of 100 (Routine)
Culpeper	United States	Record daily precipitation	48.3 mm (1.9 in)	34 of 100 (Routine)
New Orleans Audubon	United States	Record low maximum temperature	26.7 C (80.1 F)	34 of 100 (Routine)
Dikson	Russia	Record high minimum temperature	11.8 C (53.2 F)	33 of 100 (Routine)
Sosnovo-Ozerskoe	Russia	Record daily precipitation	58.5 mm (2.3 in)	33 of 100 (Routine)
State UNIV	United States	Record low maximum temperature	26.7 C (80.1 F)	33 of 100 (Routine)
Clemson UNIV	United States	Record low maximum temperature	24.4 C (75.9 F)	33 of 100 (Routine)

Counts by Type and Timescale

722 records

Records set or tied on 30 June 1984 by type: Highest daily maximum 72, Lowest daily maximum 168, Highest daily minimum 87, Lowest daily minimum 125, Heaviest daily rainfall 270.

Records on 30 June 1984 by type
Record type	Records
Highest daily maximum	72
Lowest daily maximum	168
Highest daily minimum	87
Lowest daily minimum	125
Heaviest daily rainfall	270
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 June 1984 by timescale: all-time 2, monthly 23, daily 697.

How Much Records Were Beaten By

573 broken records

Margins by which the 573 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 111.5. Ties are not counted.

Top 20 by Significance

30 June 1984

Top 20 records on 30 June 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 1984	Tucson Magnetic Obsy, US	daily rain	30.2 mm (1.2 in)	22.8 mm (0.9 in)	70 years	66 of 100 (Major)
30 June 1984	Centerville, US	daily rain	85.6 mm (3.4 in)	78.5 mm (3.1 in)	44 years	57 of 100 (Notable)
30 June 1984	Buffalo, US	daily rain	118.1 mm (4.6 in)	111.5 mm (4.4 in)	40 years	56 of 100 (Notable)
30 June 1984	Ny City Cntrl Park, US	daily rain	78.0 mm (3.1 in)	29.0 mm (1.1 in)	69 years	56 of 100 (Notable)
30 June 1984	Jewett, US	daily rain	73.7 mm (2.9 in)	43.2 mm (1.7 in)	74 years	55 of 100 (Notable)
30 June 1984	Ball Ground, US	monthly rain	125.2 mm (4.9 in)	46.5 mm (1.8 in)	4 years	54 of 100 (Notable)
30 June 1984	Walnut Grove, US	daily rain	48.3 mm (1.9 in)	27.5 mm (1.1 in)	52 years	53 of 100 (Notable)
30 June 1984	Bon Wier, US	daily rain	100.3 mm (3.9 in)	71.6 mm (2.8 in)	22 years	52 of 100 (Notable)
30 June 1984	Andrews, US	daily rain	44.7 mm (1.8 in)	28.4 mm (1.1 in)	66 years	51 of 100 (Notable)
30 June 1984	Pyramid, US	monthly rain	33.8 mm (1.3 in)	7.6 mm (0.30 in)	60 years	49 of 100 (Notable)
30 June 1984	Indian Mills 2 W, US	daily rain	62.5 mm (2.5 in)	31.3 mm (1.2 in)	63 years	49 of 100 (Notable)
30 June 1984	Norrkoping-Sorby, SE	daily rain	33.0 mm (1.3 in)	22.4 mm (0.9 in)	19 years	48 of 100 (Notable)
30 June 1984	Mineola, US	monthly rain	109.2 mm (4.3 in)	27.4 mm (1.1 in)	38 years	48 of 100 (Notable)
30 June 1984	Hico, US	daily low min	10.0 C (50.0 F)	6.7 C (12.1 F)	61 years	47 of 100 (Notable)
30 June 1984	Darrington Rs, US	daily rain	29.2 mm (1.1 in)	17.3 mm (0.7 in)	63 years	47 of 100 (Notable)
30 June 1984	Talon, RU	daily rain	51.3 mm (2.0 in)	43.5 mm (1.7 in)	12 years	46 of 100 (Notable)
30 June 1984	Salisbury, US	daily rain	52.1 mm (2.1 in)	29.2 mm (1.1 in)	56 years	46 of 100 (Notable)
30 June 1984	Albany 3 SE, US	daily rain	75.4 mm (3.0 in)	33.2 mm (1.3 in)	40 years	45 of 100 (Notable)
30 June 1984	Teriberka, RU	daily rain	32.4 mm (1.3 in)	12.2 mm (0.5 in)	13 years	43 of 100 (Notable)
30 June 1984	Arivaca, US	daily rain	35.1 mm (1.4 in)	21.4 mm (0.8 in)	4 years	43 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

1826 to 1984

Records set or tied on this calendar date in each year from 1826 to 1984. 1984 had 722 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 1984-06-30: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 20	524
20 to 40	38
40 to 60	6
60 to 80	4
80 to 100	0
100 to 120	1