Weather Records on 12 May 1999

881 weather records were set or tied worldwide on 12 May 1999. Highest significance: McKenzie Rvr Rs, US.

Key Facts for 12 May 1999

On 12 May 1999, 881 weather records were set or tied at long-record stations worldwide.
221 were record highs and 421 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 30 monthly and 849 daily.
McKenzie Rvr Rs set a monthly record daily precipitation of 112.8 mm (4.4 in) on 12 May 1999.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 450 records.

Record Map

881 stations

881 station records on 12 May 1999 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1999: highest significance records shown on the map
Station	Country	Type	Value	Significance
McKenzie Rvr Rs	United States	Record daily precipitation	112.8 mm (4.4 in)	61 of 100 (Major)
Galesburg	United States	Record daily precipitation	50.3 mm (2.0 in)	60 of 100 (Major)
Britt 3E	United States	Record daily precipitation	52.8 mm (2.1 in)	59 of 100 (Notable)
Oberstdorf	Germany	Record daily precipitation	60.7 mm (2.4 in)	58 of 100 (Notable)
Iowa Falls	United States	Record daily precipitation	56.1 mm (2.2 in)	58 of 100 (Notable)
Pago Pago WSO AP	American Samoa [United States]	Record daily precipitation	218.4 mm (8.6 in)	56 of 100 (Notable)
Clarion	United States	Record daily precipitation	50.8 mm (2.0 in)	48 of 100 (Notable)
Grundy Ctr	United States	Record daily precipitation	42.4 mm (1.7 in)	47 of 100 (Notable)
Cheboygan	United States	Record low minimum temperature	-12.2 C (10.0 F)	46 of 100 (Notable)
Podor	Senegal	Record high maximum temperature	46.5 C (115.7 F)	45 of 100 (Notable)
Parnu	Estonia	Record low minimum temperature	-3.5 C (25.7 F)	44 of 100 (Notable)
Eutin	Germany	Record daily precipitation	26.9 mm (1.1 in)	44 of 100 (Notable)
Zuerich/Fluntern	Switzerland	Record daily precipitation	94.2 mm (3.7 in)	44 of 100 (Notable)
Austin Waste Wtp Facility	United States	Record daily precipitation	41.7 mm (1.6 in)	44 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	31.2 mm (1.2 in)	42 of 100 (Notable)
Kremmling	United States	Record low maximum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Ames 8 WSW	United States	Record daily precipitation	56.4 mm (2.2 in)	41 of 100 (Notable)
Indianola 1SW	United States	Record daily precipitation	46.2 mm (1.8 in)	41 of 100 (Notable)
Independence	United States	Record daily precipitation	81.3 mm (3.2 in)	41 of 100 (Notable)
Cedar	United States	Record daily precipitation	50.8 mm (2.0 in)	41 of 100 (Notable)
Winnibigoshish Dam	United States	Record daily precipitation	29.7 mm (1.2 in)	41 of 100 (Notable)
Finca la Victoria	Mexico	Record daily precipitation	84.8 mm (3.3 in)	40 of 100 (Notable)
Ellsworth 1E	United States	Record daily precipitation	49.0 mm (1.9 in)	40 of 100 (Notable)
Adelaide (Waite Institute)	Australia	Record low minimum temperature	-1.5 C (29.3 F)	39 of 100 (Notable)
Wollongbar (Central Park Drive	Australia	Record daily precipitation	32.6 mm (1.3 in)	39 of 100 (Notable)
Tortosa - Observatorio del Ebr	Spain	Record high minimum temperature	17.5 C (63.5 F)	39 of 100 (Notable)
Hampton	United States	Record daily precipitation	44.7 mm (1.8 in)	39 of 100 (Notable)
Santiago 3 E	United States	Record daily precipitation	46.5 mm (1.8 in)	39 of 100 (Notable)
Springfield	United States	Record daily precipitation	61.0 mm (2.4 in)	39 of 100 (Notable)
Saentis	Switzerland	Record daily precipitation	70.7 mm (2.8 in)	38 of 100 (Notable)
Chiang Rai	Thailand	Record low maximum temperature	21.7 C (71.1 F)	38 of 100 (Notable)
Gunnison 3SW	United States	Record low minimum temperature	-8.9 C (16.0 F)	38 of 100 (Notable)
Mason City	United States	Record daily precipitation	45.2 mm (1.8 in)	38 of 100 (Notable)
New Hope	United States	Record daily precipitation	49.8 mm (2.0 in)	38 of 100 (Notable)
Cornwall	United States	Record low minimum temperature	-2.8 C (27.0 F)	38 of 100 (Notable)
Konstanz	Germany	Record daily precipitation	31.2 mm (1.2 in)	37 of 100 (Notable)
Forest City 2 NNE	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Tartu-Toravere	Estonia	Record low minimum temperature	-4.5 C (23.9 F)	36 of 100 (Notable)
Ixmiquilpan (Smn)	Mexico	Record high minimum temperature	17.8 C (64.0 F)	36 of 100 (Notable)
Blue Mtn Dam	United States	Record daily precipitation	55.4 mm (2.2 in)	36 of 100 (Notable)
Blair	United States	Record daily precipitation	45.2 mm (1.8 in)	36 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record high maximum temperature	15.5 C (59.9 F)	35 of 100 (Notable)
Oberstdorf	Germany	Record high minimum temperature	10.2 C (50.4 F)	35 of 100 (Notable)
Ljubljana Bezigrad	Slovenia	Record high minimum temperature	16.1 C (61.0 F)	35 of 100 (Notable)
Belle Plaine	United States	Record daily precipitation	61.2 mm (2.4 in)	35 of 100 (Notable)
Dumont	United States	Record daily precipitation	50.3 mm (2.0 in)	35 of 100 (Notable)
Jewell	United States	Record daily precipitation	39.9 mm (1.6 in)	35 of 100 (Notable)
Northwood	United States	Record daily precipitation	48.0 mm (1.9 in)	35 of 100 (Notable)
Tonala (Dge)	Mexico	Record high minimum temperature	28.9 C (84.0 F)	34 of 100 (Routine)
Chiang Mai	Thailand	Record low maximum temperature	23.7 C (74.7 F)	34 of 100 (Routine)
Big Falls	United States	Record daily precipitation	27.9 mm (1.1 in)	34 of 100 (Routine)
Zumbrota	United States	Record daily precipitation	38.4 mm (1.5 in)	34 of 100 (Routine)
Sao Felix de Balsas	Brazil	Record daily precipitation	37.7 mm (1.5 in)	33 of 100 (Routine)
Pjarnu	Estonia	Record low minimum temperature	-3.5 C (25.7 F)	33 of 100 (Routine)
Buenavista	Mexico	Record low maximum temperature	30.0 C (86.0 F)	33 of 100 (Routine)
Centro Experimental W-75	Mexico	Record high minimum temperature	27.8 C (82.0 F)	33 of 100 (Routine)
Nochistlan	Mexico	Record low minimum temperature	5.0 C (41.0 F)	33 of 100 (Routine)
Wells	United States	Record daily precipitation	39.4 mm (1.6 in)	33 of 100 (Routine)
Hohenpeissenberg	Germany	Record daily precipitation	39.5 mm (1.6 in)	32 of 100 (Routine)
Sigmarszell-Zeisertsweiler	Germany	Record daily precipitation	49.6 mm (2.0 in)	32 of 100 (Routine)

Counts by Type and Timescale

881 records

Records set or tied on 12 May 1999 by type: Highest daily maximum 104, Lowest daily maximum 186, Highest daily minimum 117, Lowest daily minimum 235, Heaviest daily rainfall 231, Heaviest daily snowfall 3, Deepest snow cover 5.

Records on 12 May 1999 by type
Record type	Records
Highest daily maximum	104
Lowest daily maximum	186
Highest daily minimum	117
Lowest daily minimum	235
Heaviest daily rainfall	231
Heaviest daily snowfall	3
Deepest snow cover	5

Records on 12 May 1999 by timescale: all-time 2, monthly 30, daily 849.

How Much Records Were Beaten By

723 broken records

Margins by which the 723 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 508.0. Ties are not counted.

Top 20 by Significance

12 May 1999

Top 20 records on 12 May 1999 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1999	McKenzie Rvr Rs, US	monthly rain	112.8 mm (4.4 in)	48.0 mm (1.9 in)	7 years	61 of 100 (Major)
12 May 1999	Galesburg, US	daily rain	50.3 mm (2.0 in)	34.3 mm (1.4 in)	65 years	60 of 100 (Major)
12 May 1999	Britt 3E, US	daily rain	52.8 mm (2.1 in)	34.8 mm (1.4 in)	78 years	59 of 100 (Notable)
12 May 1999	Oberstdorf, DE	daily rain	60.7 mm (2.4 in)	26.9 mm (1.1 in)	68 years	58 of 100 (Notable)
12 May 1999	Iowa Falls, US	daily rain	56.1 mm (2.2 in)	25.6 mm (1.0 in)	86 years	58 of 100 (Notable)
12 May 1999	Pago Pago WSO AP, AS	monthly rain	218.4 mm (8.6 in)	79.2 mm (3.1 in)	12 years	56 of 100 (Notable)
12 May 1999	Clarion, US	daily rain	50.8 mm (2.0 in)	36.3 mm (1.4 in)	28 years	48 of 100 (Notable)
12 May 1999	Grundy Ctr, US	daily rain	42.4 mm (1.7 in)	17.0 mm (0.7 in)	78 years	47 of 100 (Notable)
12 May 1999	Cheboygan, US	monthly low min	-12.2 C (10.0 F)	3.9 C (7.0 F)	56 years	46 of 100 (Notable)
12 May 1999	Podor, SN	daily high max	46.5 C (115.7 F)	1.5 C (2.7 F)	139 years	45 of 100 (Notable)
12 May 1999	Parnu, EE	daily low min	-3.5 C (25.7 F)	2.0 C (3.6 F)	98 years	44 of 100 (Notable)
12 May 1999	Eutin, DE	daily rain	26.9 mm (1.1 in)	10.6 mm (0.4 in)	56 years	44 of 100 (Notable)
12 May 1999	Zuerich/Fluntern, CH	monthly rain	94.2 mm (3.7 in)	4.1 mm (0.16 in)	67 years	44 of 100 (Notable)
12 May 1999	Austin Waste Wtp Facility, US	daily rain	41.7 mm (1.6 in)	20.9 mm (0.8 in)	61 years	44 of 100 (Notable)
12 May 1999	Muskegon Co AP, US	daily rain	31.2 mm (1.2 in)	7.1 mm (0.28 in)	84 years	42 of 100 (Notable)
12 May 1999	Kremmling, US	daily low max	6.7 C (44.1 F)	3.3 C (5.9 F)	89 years	41 of 100 (Notable)
12 May 1999	Ames 8 WSW, US	daily rain	56.4 mm (2.2 in)	36.1 mm (1.4 in)	32 years	41 of 100 (Notable)
12 May 1999	Indianola 1SW, US	daily rain	46.2 mm (1.8 in)	14.7 mm (0.6 in)	65 years	41 of 100 (Notable)
12 May 1999	Independence, US	daily rain	81.3 mm (3.2 in)	40.9 mm (1.6 in)	16 years	41 of 100 (Notable)
12 May 1999	Cedar, US	daily rain	50.8 mm (2.0 in)	26.4 mm (1.0 in)	36 years	41 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 1999

Records set or tied on this calendar date in each year from 1814 to 1999. 1999 had 881 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 1999-05-12: 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 100	721
100 to 200	0
200 to 300	1
300 to 400	0
400 to 500	0
500 to 600	1