Weather Records on 30 June 1979

601 weather records were set or tied worldwide on 30 June 1979. Highest significance: Wauseon Wtp, US.

Key Facts for 30 June 1979

On 30 June 1979, 601 weather records were set or tied at long-record stations worldwide.
271 were record highs and 137 were record lows, counting maximum and minimum temperature.
By timescale, 8 were all-time records, 18 monthly and 575 daily.
Wauseon Wtp set a daily record precipitation of 101.3 mm (4.0 in) on 30 June 1979.
Across 160 earlier years (1826 to 2026) the same calendar date averaged 449 records.

Record Map

601 stations

601 station records on 30 June 1979 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 June 1979: highest significance records shown on the map
Station	Country	Type	Value	Significance
Wauseon Wtp	United States	Record daily precipitation	101.3 mm (4.0 in)	62 of 100 (Major)
Sombrerete (Dge)	Mexico	Record low minimum temperature	5.0 C (41.0 F)	58 of 100 (Notable)
Ionia 2SSW	United States	Record daily precipitation	64.0 mm (2.5 in)	53 of 100 (Notable)
Montpelier	United States	Record daily precipitation	62.2 mm (2.4 in)	50 of 100 (Notable)
Paulding	United States	Record daily precipitation	62.2 mm (2.4 in)	49 of 100 (Notable)
Angola	United States	Record daily precipitation	46.7 mm (1.8 in)	43 of 100 (Notable)
Monroe	United States	Record daily precipitation	52.1 mm (2.1 in)	41 of 100 (Notable)
Defiance	United States	Record daily precipitation	42.4 mm (1.7 in)	41 of 100 (Notable)
Milford Gm Proving Ground	United States	Record daily precipitation	58.7 mm (2.3 in)	40 of 100 (Notable)
Livingston 5 NE	United States	Record daily precipitation	60.5 mm (2.4 in)	40 of 100 (Notable)
Buntzen Lake	Canada	Record daily precipitation	87.8 mm (3.5 in)	39 of 100 (Notable)
Coquitlam Lake	Canada	Record daily precipitation	57.6 mm (2.3 in)	38 of 100 (Notable)
Calmar	Canada	Record high minimum temperature	18.0 C (64.4 F)	38 of 100 (Notable)
Maunabo	Puerto Rico [United States]	Record daily precipitation	83.1 mm (3.3 in)	38 of 100 (Notable)
Vanceburg	United States	Record low maximum temperature	22.2 C (72.0 F)	38 of 100 (Notable)
Hope A	Canada	Record daily precipitation	31.3 mm (1.2 in)	37 of 100 (Notable)
Norwood	Canada	Record daily precipitation	30.8 mm (1.2 in)	37 of 100 (Notable)
Klippan	Sweden	Record daily precipitation	27.6 mm (1.1 in)	37 of 100 (Notable)
Fremont	United States	Record daily precipitation	31.8 mm (1.3 in)	37 of 100 (Notable)
Snowville	United States	Record high minimum temperature	18.3 C (64.9 F)	37 of 100 (Notable)
Watson Lake A	Canada	Record daily precipitation	46.4 mm (1.8 in)	36 of 100 (Notable)
Merced	United States	Record low minimum temperature	3.3 C (37.9 F)	36 of 100 (Notable)
Humacao 2 SSE	Puerto Rico [United States]	Record daily precipitation	83.8 mm (3.3 in)	35 of 100 (Notable)
Grand Ledge 1 NW	United States	Record daily precipitation	91.4 mm (3.6 in)	35 of 100 (Notable)
W Lafayette 6 NW	United States	Record daily precipitation	46.2 mm (1.8 in)	34 of 100 (Routine)
Hastings	United States	Record daily precipitation	53.1 mm (2.1 in)	34 of 100 (Routine)
Newport River	United States	Record daily precipitation	47.0 mm (1.9 in)	34 of 100 (Routine)
Lapeer Wwtp	United States	Record daily precipitation	47.2 mm (1.9 in)	33 of 100 (Routine)
Bowling Green Wwtp	United States	Record daily precipitation	83.8 mm (3.3 in)	33 of 100 (Routine)
Newell	United States	Record low maximum temperature	17.8 C (64.0 F)	33 of 100 (Routine)
Quesnel A	Canada	Record daily precipitation	27.8 mm (1.1 in)	32 of 100 (Routine)
Kinuso Rs	Canada	Record daily precipitation	76.2 mm (3.0 in)	32 of 100 (Routine)
Tura	Russia	Record high maximum temperature	37.6 C (99.7 F)	32 of 100 (Routine)
Vitim	Russia	Record high minimum temperature	19.4 C (66.9 F)	32 of 100 (Routine)
Wilmington 3 N	United States	Record daily precipitation	34.3 mm (1.4 in)	32 of 100 (Routine)
Lima Wwtp	United States	Record daily precipitation	36.1 mm (1.4 in)	31 of 100 (Routine)
South Pass City	United States	Record high maximum temperature	27.2 C (81.0 F)	31 of 100 (Routine)
Kent City 2 SW	United States	Record daily precipitation	41.9 mm (1.6 in)	30 of 100 (Routine)
Wauseon Wtp	United States	Record low maximum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Moyoguarda	Mexico	Record high minimum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	72.4 mm (2.9 in)	29 of 100 (Routine)
Majenfors	Sweden	Record daily precipitation	30.0 mm (1.2 in)	29 of 100 (Routine)
Whiteriver 1 SW	United States	Record high minimum temperature	19.4 C (66.9 F)	29 of 100 (Routine)
Hayden	United States	Record high maximum temperature	33.3 C (91.9 F)	29 of 100 (Routine)
Yale 1 NNW	United States	Record daily precipitation	51.1 mm (2.0 in)	29 of 100 (Routine)
Val-Marie	Canada	Record high minimum temperature	19.0 C (66.2 F)	28 of 100 (Routine)
Agata	Russia	Record high maximum temperature	33.0 C (91.4 F)	28 of 100 (Routine)
Chiang Mai	Thailand	Record high minimum temperature	26.0 C (78.8 F)	28 of 100 (Routine)
Nikolaev	Ukraine	Record high minimum temperature	23.4 C (74.1 F)	28 of 100 (Routine)
Willcox	United States	Record high minimum temperature	23.9 C (75.0 F)	28 of 100 (Routine)
Montrose #2	United States	Record high maximum temperature	36.7 C (98.1 F)	28 of 100 (Routine)
Three Rivers	United States	Record daily precipitation	59.7 mm (2.4 in)	28 of 100 (Routine)
Busby	United States	Record high minimum temperature	17.2 C (63.0 F)	28 of 100 (Routine)
Schenley Lock 5	United States	Record daily precipitation	31.8 mm (1.3 in)	28 of 100 (Routine)
Naalehu 14	United States	Record low maximum temperature	23.9 C (75.0 F)	28 of 100 (Routine)
Palisade	United States	Record high maximum temperature	40.0 C (104.0 F)	27 of 100 (Routine)
Cadiz	United States	Record low maximum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Chilo Meldahl Locks & Dam	United States	Record daily precipitation	31.0 mm (1.2 in)	27 of 100 (Routine)
Knoxville UNIV of Tenn	United States	Record low maximum temperature	21.7 C (71.1 F)	27 of 100 (Routine)
Alcozauca (Smn)	Mexico	Record daily precipitation	31.0 mm (1.2 in)	26 of 100 (Routine)

Counts by Type and Timescale

601 records

Records set or tied on 30 June 1979 by type: Highest daily maximum 128, Lowest daily maximum 92, Highest daily minimum 143, Lowest daily minimum 45, Heaviest daily rainfall 193.

Records on 30 June 1979 by type
Record type	Records
Highest daily maximum	128
Lowest daily maximum	92
Highest daily minimum	143
Lowest daily minimum	45
Heaviest daily rainfall	193
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 June 1979 by timescale: all-time 8, monthly 18, daily 575.

How Much Records Were Beaten By

454 broken records

Margins by which the 454 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 56.6. Ties are not counted.

Top 20 by Significance

30 June 1979

Top 20 records on 30 June 1979 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 1979	Wauseon Wtp, US	daily rain	101.3 mm (4.0 in)	56.6 mm (2.2 in)	49 years	62 of 100 (Major)
30 June 1979	Sombrerete (Dge), MX	daily low min	5.0 C (41.0 F)	6.7 C (12.1 F)	53 years	58 of 100 (Notable)
30 June 1979	Ionia 2SSW, US	daily rain	64.0 mm (2.5 in)	25.9 mm (1.0 in)	76 years	53 of 100 (Notable)
30 June 1979	Montpelier, US	daily rain	62.2 mm (2.4 in)	39.3 mm (1.5 in)	28 years	50 of 100 (Notable)
30 June 1979	Paulding, US	daily rain	62.2 mm (2.4 in)	36.0 mm (1.4 in)	42 years	49 of 100 (Notable)
30 June 1979	Angola, US	daily rain	46.7 mm (1.8 in)	14.9 mm (0.6 in)	76 years	43 of 100 (Notable)
30 June 1979	Monroe, US	daily rain	52.1 mm (2.1 in)	21.4 mm (0.8 in)	48 years	41 of 100 (Notable)
30 June 1979	Defiance, US	daily rain	42.4 mm (1.7 in)	21.3 mm (0.8 in)	49 years	41 of 100 (Notable)
30 June 1979	Milford Gm Proving Ground, US	daily rain	58.7 mm (2.3 in)	25.2 mm (1.0 in)	45 years	40 of 100 (Notable)
30 June 1979	Livingston 5 NE, US	daily rain	60.5 mm (2.4 in)	48.1 mm (1.9 in)	12 years	40 of 100 (Notable)
30 June 1979	Buntzen Lake, CA	monthly rain	87.8 mm (3.5 in)	14.4 mm (0.6 in)	42 years	39 of 100 (Notable)
30 June 1979	Coquitlam Lake, CA	daily rain	57.6 mm (2.3 in)	26.6 mm (1.0 in)	45 years	38 of 100 (Notable)
30 June 1979	Calmar, CA	all-time high min	18.0 C (64.4 F)	0.2 C (0.4 F)	41 years	38 of 100 (Notable)
30 June 1979	Maunabo, PR	daily rain	83.1 mm (3.3 in)	41.4 mm (1.6 in)	16 years	38 of 100 (Notable)
30 June 1979	Vanceburg, US	daily low max	22.2 C (72.0 F)	2.8 C (5.0 F)	79 years	38 of 100 (Notable)
30 June 1979	Hope A, CA	daily rain	31.3 mm (1.2 in)	18.3 mm (0.7 in)	16 years	37 of 100 (Notable)
30 June 1979	Norwood, CA	daily rain	30.8 mm (1.2 in)	20.6 mm (0.8 in)	2 years	37 of 100 (Notable)
30 June 1979	Klippan, SE	daily rain	27.6 mm (1.1 in)	17.9 mm (0.7 in)	24 years	37 of 100 (Notable)
30 June 1979	Fremont, US	daily rain	31.8 mm (1.3 in)	9.2 mm (0.36 in)	76 years	37 of 100 (Notable)
30 June 1979	Snowville, US	daily high min	18.3 C (64.9 F)	2.2 C (4.0 F)	82 years	37 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 1979

Records set or tied on this calendar date in each year from 1826 to 1979. 1979 had 601 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 1979-06-30: 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 10	399
10 to 20	35
20 to 30	12
30 to 40	5
40 to 50	2
50 to 60	1