Weather Records on 15 April 1991

769 weather records were set or tied worldwide on 15 April 1991. Highest significance: Buffalo Bill Dam, US.

Key Facts for 15 April 1991

On 15 April 1991, 769 weather records were set or tied at long-record stations worldwide.
230 were record highs and 90 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 13 monthly and 755 daily.
Buffalo Bill Dam set a daily record snow depth of 35.6 cm (14.0 in) on 15 April 1991.
Across 159 earlier years (1801 to 2026) the same calendar date averaged 491 records.

Record Map

769 stations

769 station records on 15 April 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 April 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Buffalo Bill Dam	United States	Record snow depth	35.6 cm (14.0 in)	59 of 100 (Notable)
Cachoeira Paulista (Pcd)	Brazil	Record daily precipitation	70.0 mm (2.8 in)	56 of 100 (Notable)
Rolla Missouri S&T	United States	Record daily precipitation	85.1 mm (3.4 in)	55 of 100 (Notable)
Niles	United States	Record daily precipitation	51.3 mm (2.0 in)	52 of 100 (Notable)
Red Lodge	United States	Record snow depth	144.8 cm (57.0 in)	52 of 100 (Notable)
Webster	United States	Record daily snowfall	7.6 cm (3.0 in)	52 of 100 (Notable)
Rohwer 2 NNE	United States	Record daily precipitation	91.2 mm (3.6 in)	51 of 100 (Notable)
Monticello Muni AP	United States	Record daily precipitation	71.9 mm (2.8 in)	51 of 100 (Notable)
Tlaxco	Mexico	Record daily precipitation	51.8 mm (2.0 in)	50 of 100 (Notable)
Winfield 2 SW	United States	Record daily precipitation	81.0 mm (3.2 in)	50 of 100 (Notable)
Sisseton	United States	Record daily snowfall	7.6 cm (3.0 in)	49 of 100 (Notable)
Santa Branca	Brazil	Record daily precipitation	77.7 mm (3.1 in)	48 of 100 (Notable)
Varadouro	Brazil	Record daily precipitation	63.6 mm (2.5 in)	47 of 100 (Notable)
Hornindal	Norway	Record daily precipitation	45.8 mm (1.8 in)	47 of 100 (Notable)
Caribou 2 S	United States	Record daily precipitation	25.7 mm (1.0 in)	47 of 100 (Notable)
Chelan	United States	Record daily precipitation	27.9 mm (1.1 in)	47 of 100 (Notable)
Heart Mtn	United States	Record snow depth	30.5 cm (12.0 in)	47 of 100 (Notable)
Muskegon Co AP	United States	Record daily precipitation	37.6 mm (1.5 in)	47 of 100 (Notable)
Fazenda Natal	Brazil	Record daily precipitation	75.0 mm (3.0 in)	46 of 100 (Notable)
Caribou 2 S	United States	Record daily snowfall	15.2 cm (6.0 in)	46 of 100 (Notable)
Groveton	United States	Record daily precipitation	65.5 mm (2.6 in)	46 of 100 (Notable)
Homer 1N	United States	Record daily precipitation	73.7 mm (2.9 in)	45 of 100 (Notable)
Long Prairie	United States	Record daily snowfall	21.6 cm (8.5 in)	45 of 100 (Notable)
Lame Deer	United States	Record snow depth	25.4 cm (10.0 in)	45 of 100 (Notable)
Chicago UNIV	United States	Record daily precipitation	45.5 mm (1.8 in)	45 of 100 (Notable)
High Landing 2 NW	United States	Record daily snowfall	10.2 cm (4.0 in)	44 of 100 (Notable)
Litchfield	United States	Record daily snowfall	12.7 cm (5.0 in)	44 of 100 (Notable)
Longview	United States	Record daily precipitation	63.5 mm (2.5 in)	44 of 100 (Notable)
Biskra	Algeria	Record high minimum temperature	22.5 C (72.5 F)	43 of 100 (Notable)
Petropavlovsk-Kamchatskij	Russia	Record daily precipitation	53.3 mm (2.1 in)	43 of 100 (Notable)
Brookhaven City	United States	Record daily precipitation	69.9 mm (2.8 in)	43 of 100 (Notable)
State UNIV	United States	Record daily precipitation	70.6 mm (2.8 in)	43 of 100 (Notable)
Mystic Lake	United States	Record snow depth	121.9 cm (48.0 in)	43 of 100 (Notable)
Clarksdale	United States	Record daily precipitation	77.2 mm (3.0 in)	42 of 100 (Notable)
University	United States	Record daily precipitation	73.9 mm (2.9 in)	42 of 100 (Notable)
Smithville	United States	Record daily precipitation	49.5 mm (1.9 in)	42 of 100 (Notable)
Aparecida	Brazil	Record daily precipitation	52.7 mm (2.1 in)	41 of 100 (Notable)
Calhoun 2 N	United States	Record daily precipitation	50.5 mm (2.0 in)	41 of 100 (Notable)
Lake City Exp Farm	United States	Record daily precipitation	38.6 mm (1.5 in)	41 of 100 (Notable)
Semjachik	Russia	Record daily precipitation	64.3 mm (2.5 in)	40 of 100 (Notable)
Bastrop	United States	Record daily precipitation	44.7 mm (1.8 in)	40 of 100 (Notable)
Grand Haven Fire Dept	United States	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Argyle	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily precipitation	33.5 mm (1.3 in)	40 of 100 (Notable)
Cachoeira Paulista	Brazil	Record daily precipitation	63.0 mm (2.5 in)	39 of 100 (Notable)
Vernon	United States	Record daily precipitation	80.0 mm (3.1 in)	39 of 100 (Notable)
Pelican Rapids	United States	Record daily snowfall	8.9 cm (3.5 in)	39 of 100 (Notable)
Water Valley	United States	Record daily precipitation	54.4 mm (2.1 in)	39 of 100 (Notable)
Vandalia	United States	Record daily precipitation	39.9 mm (1.6 in)	39 of 100 (Notable)
Gibson 2 NE	United States	Record snow depth	35.6 cm (14.0 in)	39 of 100 (Notable)
Bowler	United States	Record daily snowfall	10.2 cm (4.0 in)	39 of 100 (Notable)
Aurora Water	United States	Record daily precipitation	34.3 mm (1.4 in)	38 of 100 (Notable)
Hart 3 WSW	United States	Record daily precipitation	44.2 mm (1.7 in)	38 of 100 (Notable)
Louisiana	United States	Record daily precipitation	44.5 mm (1.8 in)	38 of 100 (Notable)
Detroit Lakes 1 NNE	United States	Record daily snowfall	11.4 cm (4.5 in)	37 of 100 (Notable)
Swan Lake	United States	Record daily precipitation	50.8 mm (2.0 in)	37 of 100 (Notable)
Livingston 2 NNE	United States	Record daily precipitation	85.3 mm (3.4 in)	37 of 100 (Notable)
Campos de Cunha	Brazil	Record daily precipitation	43.7 mm (1.7 in)	36 of 100 (Notable)
Carrollton	United States	Record high minimum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
Chicago Midway AP 3SW	United States	Record daily precipitation	32.0 mm (1.3 in)	36 of 100 (Notable)

Counts by Type and Timescale

769 records

Records set or tied on 15 April 1991 by type: Highest daily maximum 72, Lowest daily maximum 38, Highest daily minimum 158, Lowest daily minimum 52, Heaviest daily rainfall 369, Heaviest daily snowfall 39, Deepest snow cover 41.

Records on 15 April 1991 by type
Record type	Records
Highest daily maximum	72
Lowest daily maximum	38
Highest daily minimum	158
Lowest daily minimum	52
Heaviest daily rainfall	369
Heaviest daily snowfall	39
Deepest snow cover	41

Records on 15 April 1991 by timescale: all-time 1, monthly 13, daily 755.

How Much Records Were Beaten By

630 broken records

Margins by which the 630 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 711.0. Ties are not counted.

Top 20 by Significance

15 April 1991

Top 20 records on 15 April 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 April 1991	Buffalo Bill Dam, US	daily snow depth	35.6 cm (14.0 in)	33.1 cm (13.0 in)	50 years	59 of 100 (Notable)
15 April 1991	Cachoeira Paulista (Pcd), BR	daily rain	70.0 mm (2.8 in)	58.3 mm (2.3 in)	36 years	56 of 100 (Notable)
15 April 1991	Rolla Missouri S&T, US	daily rain	85.1 mm (3.4 in)	40.4 mm (1.6 in)	49 years	55 of 100 (Notable)
15 April 1991	Niles, US	daily rain	51.3 mm (2.0 in)	35.0 mm (1.4 in)	44 years	52 of 100 (Notable)
15 April 1991	Red Lodge, US	daily snow depth	144.8 cm (57.0 in)	71.1 cm (28.0 in)	37 years	52 of 100 (Notable)
15 April 1991	Webster, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	93 years	52 of 100 (Notable)
15 April 1991	Rohwer 2 NNE, US	daily rain	91.2 mm (3.6 in)	82.8 mm (3.3 in)	29 years	51 of 100 (Notable)
15 April 1991	Monticello Muni AP, US	daily rain	71.9 mm (2.8 in)	54.4 mm (2.1 in)	36 years	51 of 100 (Notable)
15 April 1991	Tlaxco, MX	monthly rain	51.8 mm (2.0 in)	14.0 mm (0.6 in)	37 years	50 of 100 (Notable)
15 April 1991	Winfield 2 SW, US	daily rain	81.0 mm (3.2 in)	42.9 mm (1.7 in)	65 years	50 of 100 (Notable)
15 April 1991	Sisseton, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	90 years	49 of 100 (Notable)
15 April 1991	Santa Branca, BR	daily rain	77.7 mm (3.1 in)	54.3 mm (2.1 in)	10 years	48 of 100 (Notable)
15 April 1991	Varadouro, BR	daily rain	63.6 mm (2.5 in)	46.9 mm (1.8 in)	10 years	47 of 100 (Notable)
15 April 1991	Hornindal, NO	daily rain	45.8 mm (1.8 in)	10.5 mm (0.4 in)	84 years	47 of 100 (Notable)
15 April 1991	Caribou 2 S, US	daily rain	25.7 mm (1.0 in)	19.3 mm (0.8 in)	49 years	47 of 100 (Notable)
15 April 1991	Chelan, US	monthly rain	27.9 mm (1.1 in)	8.6 mm (0.34 in)	28 years	47 of 100 (Notable)
15 April 1991	Heart Mtn, US	daily snow depth	30.5 cm (12.0 in)	30.5 cm (12.0 in)	40 years	47 of 100 (Notable)
15 April 1991	Muskegon Co AP, US	daily rain	37.6 mm (1.5 in)	21.1 mm (0.8 in)	37 years	47 of 100 (Notable)
15 April 1991	Fazenda Natal, BR	daily rain	75.0 mm (3.0 in)	61.1 mm (2.4 in)	10 years	46 of 100 (Notable)
15 April 1991	Caribou 2 S, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	48 years	46 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

1801 to 1991

Records set or tied on this calendar date in each year from 1801 to 1991. 1991 had 769 records.

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

Records on 04-15 in each year
Year	Records
1801	1
1817	1
1820	1
1844	1
1845	1
1847	1
1849	1
1853	2
1855	2
1858	1
1862	3
1865	3
1866	1
1868	1
1869	2
1873	1
1874	1
1876	1
1880	1
1882	1
1885	3
1886	1
1887	3
1889	2
1890	3
1891	2
1892	8
1893	2
1894	1
1896	2
1897	1
1898	2
1899	4
1900	9
1901	2
1902	4
1903	8
1904	39
1905	11
1906	20
1907	18
1908	15
1909	18
1910	16
1911	20
1912	24
1913	39
1914	17
1915	13
1916	15
1917	35
1918	40
1919	22
1920	50
1921	59
1922	94
1923	178
1924	172
1925	168
1926	453
1927	321
1928	631
1929	91
1930	289
1931	388
1932	150
1933	300
1934	339
1935	515
1936	439
1937	277
1938	596
1939	789
1940	581
1941	628
1942	525
1943	1,037
1944	313
1945	783
1946	245
1947	532
1948	306
1949	419
1950	568
1951	504
1952	357
1953	475
1954	896
1955	484
1956	750
1957	378
1958	458
1959	314
1960	319
1961	877
1962	733
1963	714
1964	382
1965	504
1966	464
1967	599
1968	476
1969	555
1970	841
1971	640
1972	896
1973	667
1974	385
1975	780
1976	1,566
1977	649
1978	426
1979	370
1980	1,066
1981	724
1982	955
1983	1,343
1984	612
1985	788
1986	1,140
1987	579
1988	839
1989	836
1990	837
1991	769
1992	783
1993	1,156
1994	835
1995	805
1996	1,173
1997	1,031
1998	1,752
1999	1,249
2000	1,163
2001	1,043
2002	1,866
2003	1,760
2004	761
2005	583
2006	1,637
2007	1,776
2008	1,157
2009	853
2010	804
2011	1,162
2012	1,007
2013	1,146
2014	1,721
2015	739
2016	602
2017	474
2018	1,913
2019	610
2020	1,068
2021	494
2022	1,145
2023	912
2024	1,096
2025	860
2026	1,118

Download the Data

Data for records on 1991-04-15: 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	611
100 to 200	12
200 to 300	2
300 to 400	3
400 to 500	0
500 to 600	0
600 to 700	1
700 to 800	1