Weather Records on 18 May 1977

1,126 weather records were set or tied worldwide on 18 May 1977. Highest significance: Nowendoc (Beaufort), AU.

Key Facts for 18 May 1977

On 18 May 1977, 1,126 weather records were set or tied at long-record stations worldwide.
419 were record highs and 277 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 22 monthly and 1,103 daily.
Nowendoc (Beaufort) set a daily record precipitation of 55.2 mm (2.2 in) on 18 May 1977.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 438 records.

Record Map

1,126 stations

1,126 station records on 18 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nowendoc (Beaufort)	Australia	Record daily precipitation	55.2 mm (2.2 in)	75 of 100 (Major)
Kandalaksa	Russia	Record daily precipitation	40.1 mm (1.6 in)	70 of 100 (Major)
Bowraville Recreation Club	Australia	Record daily precipitation	117.2 mm (4.6 in)	69 of 100 (Major)
Kendall Post Office	Australia	Record daily precipitation	93.2 mm (3.7 in)	69 of 100 (Major)
Ebor (Kotupna)	Australia	Record daily precipitation	116.6 mm (4.6 in)	64 of 100 (Major)
Kempsey (Wide Street)	Australia	Record daily precipitation	86.2 mm (3.4 in)	64 of 100 (Major)
Woolgoolga (Clear Place)	Australia	Record daily precipitation	136.0 mm (5.4 in)	64 of 100 (Major)
Gloucester Post Office	Australia	Record daily precipitation	76.2 mm (3.0 in)	64 of 100 (Major)
Hansboro 4 NNE	United States	Record daily precipitation	47.2 mm (1.9 in)	64 of 100 (Major)
Maclean (McLachlan Street)	Australia	Record daily precipitation	156.8 mm (6.2 in)	63 of 100 (Major)
Wauchope (Avondale Street)	Australia	Record daily precipitation	103.0 mm (4.1 in)	63 of 100 (Major)
Dorrigo Post Office	Australia	Record daily precipitation	167.2 mm (6.6 in)	62 of 100 (Major)
Upper Orara (Aurania)	Australia	Record daily precipitation	224.0 mm (8.8 in)	62 of 100 (Major)
Comboyne Post Office	Australia	Record daily precipitation	142.4 mm (5.6 in)	62 of 100 (Major)
Krambach (Bellevue)	Australia	Record daily precipitation	89.0 mm (3.5 in)	62 of 100 (Major)
Perpignan	France	Record daily precipitation	127.2 mm (5.0 in)	62 of 100 (Major)
Nyngan Airport	Australia	Record daily precipitation	42.3 mm (1.7 in)	60 of 100 (Major)
Bellingen Post Office	Australia	Record daily precipitation	144.8 mm (5.7 in)	60 of 100 (Major)
Rio de Contas	Brazil	Record daily precipitation	56.9 mm (2.2 in)	60 of 100 (Major)
Bulahdelah Post Office	Australia	Record daily precipitation	102.0 mm (4.0 in)	59 of 100 (Notable)
Deloraine	Canada	Record daily precipitation	30.5 mm (1.2 in)	59 of 100 (Notable)
Macksville Country Club	Australia	Record daily precipitation	112.2 mm (4.4 in)	58 of 100 (Notable)
Nambucca Heads Bowling Club	Australia	Record daily precipitation	132.0 mm (5.2 in)	57 of 100 (Notable)
Urunga (Sunset Place)	Australia	Record daily precipitation	179.0 mm (7.0 in)	56 of 100 (Notable)
Krambach Post Office	Australia	Record daily precipitation	104.7 mm (4.1 in)	56 of 100 (Notable)
Taree (Radio Station 2Re)	Australia	Record daily precipitation	81.8 mm (3.2 in)	56 of 100 (Notable)
Bulby Brush (Blue Look-Out)	Australia	Record daily precipitation	77.4 mm (3.0 in)	54 of 100 (Notable)
Sea Lake (Marston Downs)	Australia	Record daily precipitation	31.8 mm (1.3 in)	54 of 100 (Notable)
Malhada de Pedras	Brazil	Record daily precipitation	35.0 mm (1.4 in)	54 of 100 (Notable)
Bellbrook (East Street)	Australia	Record daily precipitation	50.8 mm (2.0 in)	53 of 100 (Notable)
Boigbeat	Australia	Record daily precipitation	36.0 mm (1.4 in)	53 of 100 (Notable)
Forster - Tuncurry R.V.C.P.	Australia	Record daily precipitation	87.0 mm (3.4 in)	52 of 100 (Notable)
Cooranbong (Avondale)	Australia	Record daily precipitation	67.4 mm (2.7 in)	52 of 100 (Notable)
Maude Post Office	Australia	Record daily precipitation	41.0 mm (1.6 in)	52 of 100 (Notable)
Ipanema	Brazil	Record daily precipitation	31.4 mm (1.2 in)	52 of 100 (Notable)
Nyah (Yarraby Tank)	Australia	Record daily precipitation	27.4 mm (1.1 in)	51 of 100 (Notable)
Miandetta (Tyrone)	Australia	Record daily precipitation	30.0 mm (1.2 in)	50 of 100 (Notable)
Port Macquarie (Bellevue Garde	Australia	Record daily precipitation	77.6 mm (3.1 in)	50 of 100 (Notable)
Lorne (Lorne Road)	Australia	Record daily precipitation	84.4 mm (3.3 in)	50 of 100 (Notable)
Warracknabeal (Earlstan)	Australia	Record daily precipitation	33.0 mm (1.3 in)	50 of 100 (Notable)
Cypress River	Canada	Record daily precipitation	36.8 mm (1.4 in)	50 of 100 (Notable)
Ceylon	Canada	Record daily precipitation	46.2 mm (1.8 in)	49 of 100 (Notable)
Nyngan (Canonbar)	Australia	Record daily precipitation	35.4 mm (1.4 in)	47 of 100 (Notable)
Copmanhurst Post Office	Australia	Record daily precipitation	71.0 mm (2.8 in)	47 of 100 (Notable)
Moorland (Coopernook State For	Australia	Record daily precipitation	78.2 mm (3.1 in)	47 of 100 (Notable)
Maude (Nap Nap)	Australia	Record daily precipitation	34.2 mm (1.3 in)	46 of 100 (Notable)
Hannam Vale (Hannam Vale Road)	Australia	Record daily precipitation	73.0 mm (2.9 in)	45 of 100 (Notable)
Moorland (Denro-An)	Australia	Record daily precipitation	54.2 mm (2.1 in)	45 of 100 (Notable)
Brushgrove Post Office	Australia	Record daily precipitation	116.4 mm (4.6 in)	44 of 100 (Notable)
Ulmarra (Newsagency)	Australia	Record daily precipitation	80.1 mm (3.2 in)	44 of 100 (Notable)
Laurieton (Elouera St)	Australia	Record daily precipitation	86.6 mm (3.4 in)	44 of 100 (Notable)
Mallan (Niemur Valley)	Australia	Record daily precipitation	33.8 mm (1.3 in)	44 of 100 (Notable)
Sao Tome	Brazil	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Macaubas	Brazil	Record daily precipitation	44.8 mm (1.8 in)	44 of 100 (Notable)
Gyzylarbat	Turkmenistan	Record daily precipitation	27.3 mm (1.1 in)	44 of 100 (Notable)
Middletown 4 W	United States	Record high minimum temperature	18.9 C (66.0 F)	44 of 100 (Notable)
Mtn Dell Dam	United States	Record daily snowfall	15.2 cm (6.0 in)	44 of 100 (Notable)
Lower Bucca	Australia	Record daily precipitation	108.4 mm (4.3 in)	43 of 100 (Notable)
Telegraph Point (Farrawells Ro	Australia	Record daily precipitation	88.6 mm (3.5 in)	43 of 100 (Notable)
Miami	United States	Record daily precipitation	61.0 mm (2.4 in)	43 of 100 (Notable)

Counts by Type and Timescale

1,126 records

Records set or tied on 18 May 1977 by type: Highest daily maximum 162, Lowest daily maximum 169, Highest daily minimum 257, Lowest daily minimum 108, Heaviest daily rainfall 411, Heaviest daily snowfall 18, Deepest snow cover 1.

Records on 18 May 1977 by type
Record type	Records
Highest daily maximum	162
Lowest daily maximum	169
Highest daily minimum	257
Lowest daily minimum	108
Heaviest daily rainfall	411
Heaviest daily snowfall	18
Deepest snow cover	1

Records on 18 May 1977 by timescale: all-time 1, monthly 22, daily 1,103.

How Much Records Were Beaten By

902 broken records

Margins by which the 902 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 178.3. Ties are not counted.

Top 20 by Significance

18 May 1977

Top 20 records on 18 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1977	Nowendoc (Beaufort), AU	daily rain	55.2 mm (2.2 in)	43.5 mm (1.7 in)	89 years	75 of 100 (Major)
18 May 1977	Kandalaksa, RU	monthly rain	40.1 mm (1.6 in)	14.8 mm (0.6 in)	49 years	70 of 100 (Major)
18 May 1977	Bowraville Recreation Club, AU	daily rain	117.2 mm (4.6 in)	87.7 mm (3.5 in)	82 years	69 of 100 (Major)
18 May 1977	Kendall Post Office, AU	daily rain	93.2 mm (3.7 in)	76.9 mm (3.0 in)	76 years	69 of 100 (Major)
18 May 1977	Ebor (Kotupna), AU	daily rain	116.6 mm (4.6 in)	78.0 mm (3.1 in)	51 years	64 of 100 (Major)
18 May 1977	Kempsey (Wide Street), AU	daily rain	86.2 mm (3.4 in)	67.1 mm (2.6 in)	63 years	64 of 100 (Major)
18 May 1977	Woolgoolga (Clear Place), AU	daily rain	136.0 mm (5.4 in)	94.1 mm (3.7 in)	51 years	64 of 100 (Major)
18 May 1977	Gloucester Post Office, AU	daily rain	76.2 mm (3.0 in)	63.5 mm (2.5 in)	51 years	64 of 100 (Major)
18 May 1977	Hansboro 4 NNE, US	daily rain	47.2 mm (1.9 in)	38.1 mm (1.5 in)	59 years	64 of 100 (Major)
18 May 1977	Maclean (McLachlan Street), AU	daily rain	156.8 mm (6.2 in)	103.0 mm (4.1 in)	51 years	63 of 100 (Major)
18 May 1977	Wauchope (Avondale Street), AU	daily rain	103.0 mm (4.1 in)	85.2 mm (3.4 in)	51 years	63 of 100 (Major)
18 May 1977	Dorrigo Post Office, AU	daily rain	167.2 mm (6.6 in)	126.6 mm (5.0 in)	51 years	62 of 100 (Major)
18 May 1977	Upper Orara (Aurania), AU	daily rain	224.0 mm (8.8 in)	178.3 mm (7.0 in)	51 years	62 of 100 (Major)
18 May 1977	Comboyne Post Office, AU	daily rain	142.4 mm (5.6 in)	90.3 mm (3.6 in)	51 years	62 of 100 (Major)
18 May 1977	Krambach (Bellevue), AU	daily rain	89.0 mm (3.5 in)	59.0 mm (2.3 in)	51 years	62 of 100 (Major)
18 May 1977	Perpignan, FR	monthly rain	127.2 mm (5.0 in)	67.8 mm (2.7 in)	19 years	62 of 100 (Major)
18 May 1977	Nyngan Airport, AU	daily rain	42.3 mm (1.7 in)	22.0 mm (0.9 in)	90 years	60 of 100 (Major)
18 May 1977	Bellingen Post Office, AU	daily rain	144.8 mm (5.7 in)	113.6 mm (4.5 in)	44 years	60 of 100 (Major)
18 May 1977	Rio de Contas, BR	daily rain	56.9 mm (2.2 in)	46.5 mm (1.8 in)	47 years	60 of 100 (Major)
18 May 1977	Bulahdelah Post Office, AU	daily rain	102.0 mm (4.0 in)	75.8 mm (3.0 in)	58 years	59 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

1796 to 1977

Records set or tied on this calendar date in each year from 1796 to 1977. 1977 had 1,126 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 1977-05-18: 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 25	838
25 to 50	27
50 to 75	17
75 to 100	14
100 to 125	3
125 to 150	2
150 to 175	0
175 to 200	1