Weather Records on 12 May 1977

855 weather records were set or tied worldwide on 12 May 1977. Highest significance: Antenor Navarro, BR.

Key Facts for 12 May 1977

On 12 May 1977, 855 weather records were set or tied at long-record stations worldwide.
222 were record highs and 209 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 841 daily.
Antenor Navarro set a daily record precipitation of 112.0 mm (4.4 in) on 12 May 1977.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 450 records.

Record Map

855 stations

855 station records on 12 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Antenor Navarro	Brazil	Record daily precipitation	112.0 mm (4.4 in)	65 of 100 (Major)
Cradock (Kanyaka)	Australia	Record daily precipitation	40.2 mm (1.6 in)	54 of 100 (Notable)
Fazenda Timbauba	Brazil	Record daily precipitation	80.0 mm (3.1 in)	53 of 100 (Notable)
Lemon Cove	United States	Record daily precipitation	37.1 mm (1.5 in)	52 of 100 (Notable)
Bridgeport	United States	Record daily snowfall	5.1 cm (2.0 in)	45 of 100 (Notable)
Caririacu	Brazil	Record daily precipitation	73.0 mm (2.9 in)	44 of 100 (Notable)
Reutlingen-Betzingen	Germany	Record daily precipitation	32.7 mm (1.3 in)	43 of 100 (Notable)
Redelinghuis (Pol)	South Africa	Record daily precipitation	29.0 mm (1.1 in)	43 of 100 (Notable)
Umea	Sweden	Record daily precipitation	31.9 mm (1.3 in)	42 of 100 (Notable)
Lindsay	United States	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Acude Piloes	Brazil	Record daily precipitation	72.0 mm (2.8 in)	41 of 100 (Notable)
Nappa Merrie	Australia	Record daily precipitation	50.0 mm (2.0 in)	39 of 100 (Notable)
Araruna	Brazil	Record daily precipitation	64.5 mm (2.5 in)	39 of 100 (Notable)
Fort Nelson A	Canada	Record daily precipitation	42.0 mm (1.7 in)	39 of 100 (Notable)
Die Hoop	South Africa	Record daily precipitation	43.0 mm (1.7 in)	38 of 100 (Notable)
Vancouver 4 NNE	United States	Record low minimum temperature	0.0 C (32.0 F)	38 of 100 (Notable)
Hawthorne AP	United States	Record low maximum temperature	11.1 C (52.0 F)	37 of 100 (Notable)
Marquette	United States	Record high minimum temperature	15.0 C (59.0 F)	37 of 100 (Notable)
Moore Haven Lock 1	United States	Record low maximum temperature	23.9 C (75.0 F)	36 of 100 (Notable)
Baratria	Australia	Record daily precipitation	50.0 mm (2.0 in)	35 of 100 (Notable)
Dyer 5S	United States	Record low maximum temperature	10.0 C (50.0 F)	35 of 100 (Notable)
Grand Forks UNIV (NWS)	United States	Record high minimum temperature	15.0 C (59.0 F)	35 of 100 (Notable)
Cachoeiras de Macacu	Brazil	Record daily precipitation	63.8 mm (2.5 in)	34 of 100 (Routine)
Washburn	United States	Record high minimum temperature	15.6 C (60.1 F)	34 of 100 (Routine)
Seattle Urban Site	United States	Record low minimum temperature	3.9 C (39.0 F)	34 of 100 (Routine)
South Springfield (South Sprin	Australia	Record daily precipitation	82.6 mm (3.3 in)	33 of 100 (Routine)
Blagovescensk	Russia	Record high minimum temperature	11.4 C (52.5 F)	33 of 100 (Routine)
Kapaa Stables 1104	United States	Record daily precipitation	33.0 mm (1.3 in)	33 of 100 (Routine)
Bishop AP	United States	Record low maximum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Thunder Bay A	Canada	Record high maximum temperature	33.0 C (91.4 F)	32 of 100 (Routine)
Green Bay	United States	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Scottsbluff W B Heilig Fld AP	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Bull Harbour	Canada	Record low minimum temperature	-0.3 C (31.5 F)	31 of 100 (Routine)
Metzingen	Germany	Record daily precipitation	30.2 mm (1.2 in)	31 of 100 (Routine)
Rawsonville (Pol)	South Africa	Record daily precipitation	63.5 mm (2.5 in)	31 of 100 (Routine)
Avon Park 2 W	United States	Record low maximum temperature	25.0 C (77.0 F)	31 of 100 (Routine)
Manitowoc	United States	Record high maximum temperature	29.4 C (84.9 F)	31 of 100 (Routine)
Port Washington	United States	Record high minimum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
Manoa Tun 2 716	United States	Record daily precipitation	152.4 mm (6.0 in)	31 of 100 (Routine)
San Francisco de Los Romo (Sm	Mexico	Record high maximum temperature	38.9 C (102.0 F)	30 of 100 (Routine)
Kjahta	Russia	Record low minimum temperature	-7.3 C (18.9 F)	30 of 100 (Routine)
Bygdea	Sweden	Record daily precipitation	29.1 mm (1.1 in)	30 of 100 (Routine)
Lodi	United States	Record low maximum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Sturgeon Bay Exp Farm	United States	Record high maximum temperature	28.9 C (84.0 F)	30 of 100 (Routine)
Manchester 4 W	United States	Record low minimum temperature	1.7 C (35.1 F)	29 of 100 (Routine)
Newberry-Luce Co Rd Commission	United States	Record high minimum temperature	13.3 C (55.9 F)	29 of 100 (Routine)
Red Lake Indian Agcy	United States	Record high minimum temperature	15.0 C (59.0 F)	29 of 100 (Routine)
Louisburg	United States	Record low minimum temperature	0.6 C (33.1 F)	29 of 100 (Routine)
Sheboygan	United States	Record high minimum temperature	13.3 C (55.9 F)	29 of 100 (Routine)
Lagarto	Brazil	Record daily precipitation	36.5 mm (1.4 in)	28 of 100 (Routine)
Torrevieja	Spain	Record high maximum temperature	29.5 C (85.1 F)	28 of 100 (Routine)
La Belle	United States	Record low maximum temperature	25.0 C (77.0 F)	28 of 100 (Routine)
Cooperstown	United States	Record high maximum temperature	31.7 C (89.1 F)	28 of 100 (Routine)
Webster Springs	United States	Record low minimum temperature	0.0 C (32.0 F)	28 of 100 (Routine)
Wahiawa Dam 863	United States	Record daily precipitation	46.7 mm (1.8 in)	28 of 100 (Routine)
Treherne	Canada	Record daily precipitation	27.9 mm (1.1 in)	27 of 100 (Routine)
Pickle Lake (Aut)	Canada	Record high minimum temperature	11.1 C (52.0 F)	27 of 100 (Routine)
Red Lake A	Canada	Record high maximum temperature	29.9 C (85.8 F)	27 of 100 (Routine)
Buxton	United Kingdom	Record low maximum temperature	7.3 C (45.1 F)	27 of 100 (Routine)
Denair 3 NNE	United States	Record low maximum temperature	17.8 C (64.0 F)	27 of 100 (Routine)

Counts by Type and Timescale

855 records

Records set or tied on 12 May 1977 by type: Highest daily maximum 132, Lowest daily maximum 105, Highest daily minimum 90, Lowest daily minimum 104, Heaviest daily rainfall 417, Heaviest daily snowfall 2, Deepest snow cover 5.

Records on 12 May 1977 by type
Record type	Records
Highest daily maximum	132
Lowest daily maximum	105
Highest daily minimum	90
Lowest daily minimum	104
Heaviest daily rainfall	417
Heaviest daily snowfall	2
Deepest snow cover	5

Records on 12 May 1977 by timescale: all-time 0, monthly 14, daily 841.

How Much Records Were Beaten By

721 broken records

Margins by which the 721 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 120.0. Ties are not counted.

Top 20 by Significance

12 May 1977

Top 20 records on 12 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1977	Antenor Navarro, BR	daily rain	112.0 mm (4.4 in)	98.0 mm (3.9 in)	64 years	65 of 100 (Major)
12 May 1977	Cradock (Kanyaka), AU	daily rain	40.2 mm (1.6 in)	20.4 mm (0.8 in)	71 years	54 of 100 (Notable)
12 May 1977	Fazenda Timbauba, BR	daily rain	80.0 mm (3.1 in)	56.5 mm (2.2 in)	36 years	53 of 100 (Notable)
12 May 1977	Lemon Cove, US	daily rain	37.1 mm (1.5 in)	21.6 mm (0.9 in)	68 years	52 of 100 (Notable)
12 May 1977	Bridgeport, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	72 years	45 of 100 (Notable)
12 May 1977	Caririacu, BR	daily rain	73.0 mm (2.9 in)	47.7 mm (1.9 in)	36 years	44 of 100 (Notable)
12 May 1977	Reutlingen-Betzingen, DE	daily rain	32.7 mm (1.3 in)	18.7 mm (0.7 in)	28 years	43 of 100 (Notable)
12 May 1977	Redelinghuis (Pol), ZA	daily rain	29.0 mm (1.1 in)	17.8 mm (0.7 in)	38 years	43 of 100 (Notable)
12 May 1977	Umea, SE	daily rain	31.9 mm (1.3 in)	7.3 mm (0.29 in)	64 years	42 of 100 (Notable)
12 May 1977	Lindsay, US	daily rain	25.4 mm (1.0 in)	21.1 mm (0.8 in)	19 years	42 of 100 (Notable)
12 May 1977	Acude Piloes, BR	daily rain	72.0 mm (2.8 in)	37.0 mm (1.5 in)	36 years	41 of 100 (Notable)
12 May 1977	Nappa Merrie, AU	monthly rain	50.0 mm (2.0 in)	17.0 mm (0.7 in)	2 years	39 of 100 (Notable)
12 May 1977	Araruna, BR	daily rain	64.5 mm (2.5 in)	36.5 mm (1.4 in)	16 years	39 of 100 (Notable)
12 May 1977	Fort Nelson A, CA	monthly rain	42.0 mm (1.7 in)	7.5 mm (0.30 in)	33 years	39 of 100 (Notable)
12 May 1977	Die Hoop, ZA	daily rain	43.0 mm (1.7 in)	27.8 mm (1.1 in)	38 years	38 of 100 (Notable)
12 May 1977	Vancouver 4 NNE, US	daily low min	0.0 C (32.0 F)	2.2 C (4.0 F)	77 years	38 of 100 (Notable)
12 May 1977	Hawthorne AP, US	daily low max	11.1 C (52.0 F)	1.7 C (3.1 F)	84 years	37 of 100 (Notable)
12 May 1977	Marquette, US	daily high min	15.0 C (59.0 F)	0.7 C (1.3 F)	89 years	37 of 100 (Notable)
12 May 1977	Moore Haven Lock 1, US	daily low max	23.9 C (75.0 F)	3.3 C (5.9 F)	52 years	36 of 100 (Notable)
12 May 1977	Baratria, AU	daily rain	50.0 mm (2.0 in)	43.6 mm (1.7 in)	8 years	35 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

1814 to 1977

Records set or tied on this calendar date in each year from 1814 to 1977. 1977 had 855 records.

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

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 1977-05-12: 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	699
20 to 40	15
40 to 60	5
60 to 80	0
80 to 100	1
100 to 120	1