Weather Records on 18 May 1979

399 weather records were set or tied worldwide on 18 May 1979. Highest significance: Todos Santos (Dge), MX.

Key Facts for 18 May 1979

On 18 May 1979, 399 weather records were set or tied at long-record stations worldwide.
145 were record highs and 109 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 20 monthly and 378 daily.
Todos Santos (Dge) set a monthly record daily precipitation of 63.8 mm (2.5 in) on 18 May 1979.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 443 records.

Record Map

399 stations

399 station records on 18 May 1979 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1979: highest significance records shown on the map
Station	Country	Type	Value	Significance
Todos Santos (Dge)	Mexico	Record daily precipitation	63.8 mm (2.5 in)	60 of 100 (Major)
La Paz (Dge)	Mexico	Record daily precipitation	37.3 mm (1.5 in)	53 of 100 (Notable)
Dimbokro	Cote D'Ivoire	Record daily precipitation	76.0 mm (3.0 in)	47 of 100 (Notable)
Los Divisaderos	Mexico	Record daily precipitation	30.5 mm (1.2 in)	45 of 100 (Notable)
Newport News Press Bld	United States	Record daily precipitation	40.6 mm (1.6 in)	45 of 100 (Notable)
Jaina	Mexico	Record daily precipitation	47.8 mm (1.9 in)	41 of 100 (Notable)
Velikie Luki	Russia	Record high minimum temperature	15.2 C (59.4 F)	36 of 100 (Notable)
A Coruna	Spain	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Acude Pompeu Sobrinho	Brazil	Record daily precipitation	46.3 mm (1.8 in)	33 of 100 (Routine)
Siquirichi (Smn)	Mexico	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Humboldt 3 W	United States	Record daily precipitation	34.5 mm (1.4 in)	33 of 100 (Routine)
Vestmannaeyjar	Iceland	Record low minimum temperature	-3.5 C (25.7 F)	32 of 100 (Routine)
Guerrero (Smn)	Mexico	Record daily precipitation	36.8 mm (1.4 in)	32 of 100 (Routine)
Darrouzett	United States	Record daily precipitation	72.4 mm (2.9 in)	32 of 100 (Routine)
San Bartolo	Mexico	Record daily precipitation	43.9 mm (1.7 in)	31 of 100 (Routine)
Adak AP	United States	Record daily precipitation	33.0 mm (1.3 in)	31 of 100 (Routine)
Espirito Santo	Brazil	Record daily precipitation	63.7 mm (2.5 in)	30 of 100 (Routine)
Strongfield	Canada	Record daily precipitation	29.0 mm (1.1 in)	30 of 100 (Routine)
Dushanbe	Tajikistan	Record daily precipitation	47.5 mm (1.9 in)	29 of 100 (Routine)
Follett	United States	Record daily precipitation	43.2 mm (1.7 in)	29 of 100 (Routine)
San Francisco de Los Romo (Sm	Mexico	Record high maximum temperature	43.9 C (111.0 F)	28 of 100 (Routine)
Isla Perez	Mexico	Record high minimum temperature	26.7 C (80.1 F)	28 of 100 (Routine)
Brookings	United States	Record high minimum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
Madison Dane Co Rgnl AP	United States	Record daily precipitation	31.0 mm (1.2 in)	28 of 100 (Routine)
Roldal	Norway	Record daily precipitation	30.1 mm (1.2 in)	27 of 100 (Routine)
Kemmerer 2N	United States	Record high minimum temperature	11.1 C (52.0 F)	27 of 100 (Routine)
Mocambo	Brazil	Record daily precipitation	37.6 mm (1.5 in)	26 of 100 (Routine)
Vestmannaeyjar	Iceland	Record low maximum temperature	3.0 C (37.4 F)	26 of 100 (Routine)
Catemaco	Mexico	Record low maximum temperature	20.6 C (69.1 F)	26 of 100 (Routine)
Matua	Russia	Record daily precipitation	45.3 mm (1.8 in)	26 of 100 (Routine)
Forse	Sweden	Record high minimum temperature	9.4 C (48.9 F)	26 of 100 (Routine)
Table Rock 4N	United States	Record daily precipitation	33.8 mm (1.3 in)	26 of 100 (Routine)
Kazalinsk	Kazakhstan	Record high minimum temperature	19.4 C (66.9 F)	25 of 100 (Routine)
Willows 6 W	United States	Record high minimum temperature	23.3 C (73.9 F)	25 of 100 (Routine)
Lagoa da Canoa	Brazil	Record daily precipitation	27.3 mm (1.1 in)	24 of 100 (Routine)
Cuauhtemoc	Mexico	Record low maximum temperature	12.8 C (55.0 F)	24 of 100 (Routine)
San Bernardo (Smn)	Mexico	Record low maximum temperature	26.7 C (80.1 F)	24 of 100 (Routine)
Sand I Ryfylke II	Norway	Record daily precipitation	35.3 mm (1.4 in)	24 of 100 (Routine)
Elatma	Russia	Record high maximum temperature	28.5 C (83.3 F)	24 of 100 (Routine)
N Fk Rs	United States	Record high minimum temperature	12.2 C (54.0 F)	24 of 100 (Routine)
W Palm Beach Intl AP	United States	Record low maximum temperature	25.6 C (78.1 F)	24 of 100 (Routine)
Prudente de Morais	Brazil	Record daily precipitation	54.6 mm (2.1 in)	23 of 100 (Routine)
Reykjavik	Iceland	Record low maximum temperature	3.1 C (37.6 F)	23 of 100 (Routine)
Juarez	Mexico	Record high minimum temperature	27.8 C (82.0 F)	23 of 100 (Routine)
Auburn 5 ESE	United States	Record daily precipitation	37.3 mm (1.5 in)	23 of 100 (Routine)
Pawnee City	United States	Record daily precipitation	29.0 mm (1.1 in)	23 of 100 (Routine)
Langley AFB	United States	Record daily precipitation	31.5 mm (1.2 in)	23 of 100 (Routine)
Parafuso	Brazil	Record daily precipitation	39.2 mm (1.5 in)	22 of 100 (Routine)
Inga	Brazil	Record daily precipitation	29.0 mm (1.1 in)	22 of 100 (Routine)
Great Falls	Canada	Record low maximum temperature	2.2 C (36.0 F)	22 of 100 (Routine)
Uniontown 1 NE	United States	Record low minimum temperature	0.6 C (33.1 F)	22 of 100 (Routine)
Spearman	United States	Record daily precipitation	43.9 mm (1.7 in)	22 of 100 (Routine)
Kostroma	Russia	Record high maximum temperature	28.4 C (83.1 F)	21 of 100 (Routine)
Ust-Njukzha	Russia	Record high minimum temperature	9.4 C (48.9 F)	21 of 100 (Routine)
Fredrika	Sweden	Record high minimum temperature	9.0 C (48.2 F)	21 of 100 (Routine)
Koloko Rsvr 1137	United States	Record daily precipitation	34.8 mm (1.4 in)	21 of 100 (Routine)
Norfolk Intl AP	United States	Record daily precipitation	49.5 mm (1.9 in)	21 of 100 (Routine)
Namiquipa	Mexico	Record daily precipitation	10.9 mm (0.4 in)	20 of 100 (Routine)
Shemya USAF Base	United States	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Darganata	Uzbekistan	Record daily precipitation	14.3 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

399 records

Records set or tied on 18 May 1979 by type: Highest daily maximum 49, Lowest daily maximum 63, Highest daily minimum 96, Lowest daily minimum 46, Heaviest daily rainfall 143, Heaviest daily snowfall 2.

Records on 18 May 1979 by type
Record type	Records
Highest daily maximum	49
Lowest daily maximum	63
Highest daily minimum	96
Lowest daily minimum	46
Heaviest daily rainfall	143
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 18 May 1979 by timescale: all-time 1, monthly 20, daily 378.

How Much Records Were Beaten By

322 broken records

Margins by which the 322 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.0. Ties are not counted.

Top 20 by Significance

18 May 1979

Top 20 records on 18 May 1979 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1979	Todos Santos (Dge), MX	monthly rain	63.8 mm (2.5 in)	61.0 mm (2.4 in)	21 years	60 of 100 (Major)
18 May 1979	La Paz (Dge), MX	monthly rain	37.3 mm (1.5 in)	33.2 mm (1.3 in)	21 years	53 of 100 (Notable)
18 May 1979	Dimbokro, CI	daily rain	76.0 mm (3.0 in)	51.4 mm (2.0 in)	28 years	47 of 100 (Notable)
18 May 1979	Los Divisaderos, MX	monthly rain	30.5 mm (1.2 in)	26.2 mm (1.0 in)	21 years	45 of 100 (Notable)
18 May 1979	Newport News Press Bld, US	daily rain	40.6 mm (1.6 in)	17.5 mm (0.7 in)	74 years	45 of 100 (Notable)
18 May 1979	Jaina, MX	monthly rain	47.8 mm (1.9 in)	22.7 mm (0.9 in)	22 years	41 of 100 (Notable)
18 May 1979	Velikie Luki, RU	daily high min	15.2 C (59.4 F)	1.6 C (2.9 F)	80 years	36 of 100 (Notable)
18 May 1979	A Coruna, ES	daily rain	25.4 mm (1.0 in)	10.0 mm (0.4 in)	42 years	34 of 100 (Routine)
18 May 1979	Acude Pompeu Sobrinho, BR	daily rain	46.3 mm (1.8 in)	24.2 mm (1.0 in)	42 years	33 of 100 (Routine)
18 May 1979	Siquirichi (Smn), MX	daily rain	27.9 mm (1.1 in)	18.0 mm (0.7 in)	32 years	33 of 100 (Routine)
18 May 1979	Humboldt 3 W, US	daily rain	34.5 mm (1.4 in)	12.7 mm (0.5 in)	52 years	33 of 100 (Routine)
18 May 1979	Vestmannaeyjar, IS	daily low min	-3.5 C (25.7 F)	5.2 C (9.4 F)	29 years	32 of 100 (Routine)
18 May 1979	Guerrero (Smn), MX	monthly rain	36.8 mm (1.4 in)	1.0 mm (0.04 in)	48 years	32 of 100 (Routine)
18 May 1979	Darrouzett, US	daily rain	72.4 mm (2.9 in)	27.9 mm (1.1 in)	24 years	32 of 100 (Routine)
18 May 1979	San Bartolo, MX	monthly rain	43.9 mm (1.7 in)	16.5 mm (0.6 in)	6 years	31 of 100 (Routine)
18 May 1979	Adak AP, US	daily rain	33.0 mm (1.3 in)	19.5 mm (0.8 in)	25 years	31 of 100 (Routine)
18 May 1979	Espirito Santo, BR	monthly rain	63.7 mm (2.5 in)	6.0 mm (0.24 in)	34 years	30 of 100 (Routine)
18 May 1979	Strongfield, CA	daily rain	29.0 mm (1.1 in)	20.1 mm (0.8 in)	4 years	30 of 100 (Routine)
18 May 1979	Dushanbe, TJ	daily rain	47.5 mm (1.9 in)	11.9 mm (0.5 in)	44 years	29 of 100 (Routine)
18 May 1979	Follett, US	daily rain	43.2 mm (1.7 in)	15.5 mm (0.6 in)	44 years	29 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

1796 to 1979

Records set or tied on this calendar date in each year from 1796 to 1979. 1979 had 399 records.

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

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 1979-05-18: 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	280
10 to 20	32
20 to 30	7
30 to 40	1
40 to 50	0
50 to 60	1
60 to 70	1