Weather Records on 12 May 1984

887 weather records were set or tied worldwide on 12 May 1984. Highest significance: Stevens Pass, US.

Key Facts for 12 May 1984

On 12 May 1984, 887 weather records were set or tied at long-record stations worldwide.
329 were record highs and 376 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 22 monthly and 864 daily.
Stevens Pass set a daily record precipitation of 44.5 mm (1.8 in) on 12 May 1984.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 450 records.

Record Map

887 stations

887 station records on 12 May 1984 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1984: highest significance records shown on the map
Station	Country	Type	Value	Significance
Stevens Pass	United States	Record daily precipitation	44.5 mm (1.8 in)	51 of 100 (Notable)
Sete Barras	Brazil	Record daily precipitation	66.9 mm (2.6 in)	47 of 100 (Notable)
Usina Sao Jose	Brazil	Record daily precipitation	59.4 mm (2.3 in)	45 of 100 (Notable)
Nakhon Ratchasima	Thailand	Record daily precipitation	73.3 mm (2.9 in)	44 of 100 (Notable)
Grand Lake 6 SSW	United States	Record snow depth	33.0 cm (13.0 in)	44 of 100 (Notable)
Weifang	China	Record daily precipitation	39.1 mm (1.5 in)	43 of 100 (Notable)
Bisbee	United States	Record high minimum temperature	21.1 C (70.0 F)	42 of 100 (Notable)
Regensburg	Germany	Record low maximum temperature	7.6 C (45.7 F)	41 of 100 (Notable)
Kaawaloa 29	United States	Record daily precipitation	53.6 mm (2.1 in)	41 of 100 (Notable)
Miracatu	Brazil	Record daily precipitation	42.1 mm (1.7 in)	40 of 100 (Notable)
Paso Robles	United States	Record high minimum temperature	12.8 C (55.0 F)	40 of 100 (Notable)
Tlatlauquitepec (Cfe)	Mexico	Record daily precipitation	110.0 mm (4.3 in)	39 of 100 (Notable)
Armagh	United Kingdom	Record low minimum temperature	0.1 C (32.2 F)	39 of 100 (Notable)
Tucson WFO	United States	Record high minimum temperature	22.8 C (73.0 F)	39 of 100 (Notable)
Concrete Ppl Fish STN	United States	Record daily precipitation	45.0 mm (1.8 in)	39 of 100 (Notable)
Vanersborg	Sweden	Record low minimum temperature	-2.0 C (28.4 F)	38 of 100 (Notable)
Jacupiranga	Brazil	Record daily precipitation	41.0 mm (1.6 in)	37 of 100 (Notable)
Dubois	United States	Record high minimum temperature	7.2 C (45.0 F)	37 of 100 (Notable)
Emblem	United States	Record high minimum temperature	12.2 C (54.0 F)	37 of 100 (Notable)
Cerradinho	Brazil	Record daily precipitation	44.3 mm (1.7 in)	36 of 100 (Notable)
Vestervig	Denmark	Record low minimum temperature	0.6 C (33.1 F)	36 of 100 (Notable)
Chuuk WSO AP	Federated States of Micronesia	Record daily precipitation	103.4 mm (4.1 in)	36 of 100 (Notable)
Tg Jiu	Romania	Record daily precipitation	41.1 mm (1.6 in)	36 of 100 (Notable)
Juquia	Brazil	Record daily precipitation	48.5 mm (1.9 in)	35 of 100 (Notable)
Cuautla (Smn)	Mexico	Record low maximum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	-4.1 C (24.6 F)	35 of 100 (Notable)
Gavle	Sweden	Record low minimum temperature	-3.1 C (26.4 F)	35 of 100 (Notable)
Crescent City 3 NNW	United States	Record high minimum temperature	11.7 C (53.1 F)	35 of 100 (Notable)
Santa Maria Jacatepec	Mexico	Record daily precipitation	96.3 mm (3.8 in)	34 of 100 (Routine)
Eureka Springs 3 WNW	United States	Record high maximum temperature	32.2 C (90.0 F)	34 of 100 (Routine)
Independence	United States	Record high minimum temperature	17.2 C (63.0 F)	34 of 100 (Routine)
Orleans	United States	Record high minimum temperature	12.8 C (55.0 F)	34 of 100 (Routine)
Aachen	Germany	Record low maximum temperature	7.7 C (45.9 F)	33 of 100 (Routine)
Chapala	Mexico	Record low minimum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Yahualica de Gonzalez Gallo (	Mexico	Record low maximum temperature	22.2 C (72.0 F)	33 of 100 (Routine)
Cuautla (Smn)	Mexico	Record low minimum temperature	10.6 C (51.1 F)	33 of 100 (Routine)
Arkadelphia 2 N	United States	Record high maximum temperature	33.3 C (91.9 F)	33 of 100 (Routine)
Taquari-Vai	Brazil	Record daily precipitation	49.3 mm (1.9 in)	32 of 100 (Routine)
Saint Johns	United States	Record high minimum temperature	13.3 C (55.9 F)	32 of 100 (Routine)
Espanola	United States	Record high maximum temperature	33.3 C (91.9 F)	32 of 100 (Routine)
Madison 3NNW	United States	Record high maximum temperature	33.3 C (91.9 F)	32 of 100 (Routine)
Eldorado	Brazil	Record daily precipitation	44.0 mm (1.7 in)	31 of 100 (Routine)
Colonia Empleado	Mexico	Record daily precipitation	32.8 mm (1.3 in)	31 of 100 (Routine)
Lampang	Thailand	Record low maximum temperature	22.8 C (73.0 F)	30 of 100 (Routine)
Blanca 4 NW	United States	Record high minimum temperature	4.4 C (39.9 F)	30 of 100 (Routine)
Estancia 4N	United States	Record high maximum temperature	32.2 C (90.0 F)	30 of 100 (Routine)
Augusta State AP	United States	Record daily precipitation	44.2 mm (1.7 in)	30 of 100 (Routine)
Aracaiba (Capoeiras)	Brazil	Record daily precipitation	44.1 mm (1.7 in)	29 of 100 (Routine)
Yanzhou	China	Record daily precipitation	84.9 mm (3.3 in)	29 of 100 (Routine)
Venadero (Dge)	Mexico	Record low maximum temperature	21.7 C (71.1 F)	29 of 100 (Routine)
El Burrero	Mexico	Record low maximum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Miahuatlan (Dge)	Mexico	Record low maximum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Paso de San Antonio	Mexico	Record daily precipitation	159.8 mm (6.3 in)	29 of 100 (Routine)
Verhojansk	Russia	Record high minimum temperature	6.3 C (43.3 F)	29 of 100 (Routine)
Ukiah	United States	Record high minimum temperature	12.8 C (55.0 F)	29 of 100 (Routine)
West Hickory River	United States	Record daily precipitation	43.2 mm (1.7 in)	29 of 100 (Routine)
Piaxtla	Mexico	Record daily precipitation	39.9 mm (1.6 in)	28 of 100 (Routine)
Paraiso Novillero	Mexico	Record daily precipitation	60.2 mm (2.4 in)	28 of 100 (Routine)
Laguna	United States	Record high minimum temperature	12.2 C (54.0 F)	28 of 100 (Routine)
Frederick	United States	Record high maximum temperature	37.8 C (100.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

887 records

Records set or tied on 12 May 1984 by type: Highest daily maximum 179, Lowest daily maximum 243, Highest daily minimum 150, Lowest daily minimum 133, Heaviest daily rainfall 175, Deepest snow cover 7.

Records on 12 May 1984 by type
Record type	Records
Highest daily maximum	179
Lowest daily maximum	243
Highest daily minimum	150
Lowest daily minimum	133
Heaviest daily rainfall	175
Heaviest daily snowfall	0
Deepest snow cover	7

Records on 12 May 1984 by timescale: all-time 1, monthly 22, daily 864.

How Much Records Were Beaten By

717 broken records

Margins by which the 717 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 279.0. Ties are not counted.

Top 20 by Significance

12 May 1984

Top 20 records on 12 May 1984 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1984	Stevens Pass, US	daily rain	44.5 mm (1.8 in)	28.8 mm (1.1 in)	24 years	51 of 100 (Notable)
12 May 1984	Sete Barras, BR	daily rain	66.9 mm (2.6 in)	39.3 mm (1.5 in)	19 years	47 of 100 (Notable)
12 May 1984	Usina Sao Jose, BR	daily rain	59.4 mm (2.3 in)	50.3 mm (2.0 in)	5 years	45 of 100 (Notable)
12 May 1984	Nakhon Ratchasima, TH	daily rain	73.3 mm (2.9 in)	46.5 mm (1.8 in)	33 years	44 of 100 (Notable)
12 May 1984	Grand Lake 6 SSW, US	daily snow depth	33.0 cm (13.0 in)	27.9 cm (11.0 in)	5 years	44 of 100 (Notable)
12 May 1984	Weifang, CN	daily rain	39.1 mm (1.5 in)	32.7 mm (1.3 in)	4 years	43 of 100 (Notable)
12 May 1984	Bisbee, US	daily high min	21.1 C (70.0 F)	4.4 C (7.9 F)	73 years	42 of 100 (Notable)
12 May 1984	Regensburg, DE	daily low max	7.6 C (45.7 F)	0.9 C (1.6 F)	102 years	41 of 100 (Notable)
12 May 1984	Kaawaloa 29, US	daily rain	53.6 mm (2.1 in)	23.1 mm (0.9 in)	40 years	41 of 100 (Notable)
12 May 1984	Miracatu, BR	daily rain	42.1 mm (1.7 in)	27.7 mm (1.1 in)	30 years	40 of 100 (Notable)
12 May 1984	Paso Robles, US	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	86 years	40 of 100 (Notable)
12 May 1984	Tlatlauquitepec (Cfe), MX	monthly rain	110.0 mm (4.3 in)	24.4 mm (1.0 in)	0 years	39 of 100 (Notable)
12 May 1984	Armagh, GB	daily low min	0.1 C (32.2 F)	0.4 C (0.7 F)	95 years	39 of 100 (Notable)
12 May 1984	Tucson WFO, US	daily high min	22.8 C (73.0 F)	1.7 C (3.1 F)	88 years	39 of 100 (Notable)
12 May 1984	Concrete Ppl Fish STN, US	daily rain	45.0 mm (1.8 in)	21.4 mm (0.8 in)	6 years	39 of 100 (Notable)
12 May 1984	Vanersborg, SE	daily low min	-2.0 C (28.4 F)	1.0 C (1.8 F)	84 years	38 of 100 (Notable)
12 May 1984	Jacupiranga, BR	daily rain	41.0 mm (1.6 in)	25.9 mm (1.0 in)	31 years	37 of 100 (Notable)
12 May 1984	Dubois, US	daily high min	7.2 C (45.0 F)	2.8 C (5.0 F)	77 years	37 of 100 (Notable)
12 May 1984	Emblem, US	daily high min	12.2 C (54.0 F)	3.9 C (7.0 F)	69 years	37 of 100 (Notable)
12 May 1984	Cerradinho, BR	daily rain	44.3 mm (1.7 in)	38.0 mm (1.5 in)	19 years	36 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 1984

Records set or tied on this calendar date in each year from 1814 to 1984. 1984 had 887 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 1984-05-12: 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 50	708
50 to 100	4
100 to 150	2
150 to 200	1
200 to 250	0
250 to 300	2