Weather Records on 21 April 2002

1,312 weather records were set or tied worldwide on 21 April 2002. Highest significance: Rockville, US.

Key Facts for 21 April 2002

On 21 April 2002, 1,312 weather records were set or tied at long-record stations worldwide.
756 were record highs and 212 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 39 monthly and 1,273 daily.
Rockville set a monthly record daily precipitation of 101.6 mm (4.0 in) on 21 April 2002.
Across 159 earlier years (1793 to 2026) the same calendar date averaged 457 records.

Record Map

1,312 stations

1,312 station records on 21 April 2002 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 April 2002: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rockville	United States	Record daily precipitation	101.6 mm (4.0 in)	85 of 100 (Exceptional)
New London	United States	Record daily snowfall	14.0 cm (5.5 in)	62 of 100 (Major)
McPherson	United States	Record daily precipitation	49.0 mm (1.9 in)	60 of 100 (Major)
Winona	United States	Record snow depth	10.2 cm (4.0 in)	57 of 100 (Notable)
Montevideo 1SW	United States	Record daily snowfall	7.6 cm (3.0 in)	54 of 100 (Notable)
Wessington 2SE	United States	Record daily snowfall	12.7 cm (5.0 in)	53 of 100 (Notable)
Ellsworth 1E	United States	Record daily snowfall	12.7 cm (5.0 in)	52 of 100 (Notable)
Shelby 2 NW	United States	Record high minimum temperature	19.4 C (66.9 F)	51 of 100 (Notable)
Butte	United States	Record daily snowfall	11.9 cm (4.7 in)	49 of 100 (Notable)
Winner	United States	Record daily snowfall	15.2 cm (6.0 in)	49 of 100 (Notable)
Windsor	United States	Record daily precipitation	65.5 mm (2.6 in)	47 of 100 (Notable)
Longvalley	United States	Record daily snowfall	12.7 cm (5.0 in)	47 of 100 (Notable)
Wood	United States	Record daily snowfall	11.4 cm (4.5 in)	47 of 100 (Notable)
Mondovi	United States	Record daily snowfall	10.2 cm (4.0 in)	47 of 100 (Notable)
Gainesville	United States	Record high minimum temperature	19.4 C (66.9 F)	46 of 100 (Notable)
Matfield Green	United States	Record daily precipitation	54.9 mm (2.2 in)	46 of 100 (Notable)
Merriman	United States	Record daily snowfall	5.1 cm (2.0 in)	46 of 100 (Notable)
Highmore	United States	Record daily snowfall	5.1 cm (2.0 in)	46 of 100 (Notable)
Kadoka	United States	Record daily snowfall	8.9 cm (3.5 in)	46 of 100 (Notable)
Midland	United States	Record daily snowfall	5.1 cm (2.0 in)	46 of 100 (Notable)
Green Bay	United States	Record daily snowfall	9.7 cm (3.8 in)	46 of 100 (Notable)
La Crosse Muni AP	United States	Record daily snowfall	11.4 cm (4.5 in)	46 of 100 (Notable)
Madison Sewage Plt	United States	Record daily precipitation	76.7 mm (3.0 in)	45 of 100 (Notable)
Appleton	United States	Record daily snowfall	6.4 cm (2.5 in)	45 of 100 (Notable)
Jump Rvr 3E	United States	Record daily snowfall	10.2 cm (4.0 in)	45 of 100 (Notable)
Temascalcingo	Mexico	Record high minimum temperature	18.9 C (66.0 F)	44 of 100 (Notable)
Juncos 1 SE	Puerto Rico [United States]	Record daily precipitation	91.9 mm (3.6 in)	44 of 100 (Notable)
St Paul	United States	Record daily snowfall	13.2 cm (5.2 in)	44 of 100 (Notable)
Conway	United States	Record high maximum temperature	35.0 C (95.0 F)	44 of 100 (Notable)
Camp Crook	United States	Record daily snowfall	7.6 cm (3.0 in)	44 of 100 (Notable)
Custer	United States	Record daily snowfall	14.0 cm (5.5 in)	44 of 100 (Notable)
Milan Exp STN	United States	Record high minimum temperature	20.6 C (69.1 F)	44 of 100 (Notable)
Eielson Fld	United States	Record daily snowfall	11.2 cm (4.4 in)	44 of 100 (Notable)
Galway	Ireland	Record high minimum temperature	12.0 C (53.6 F)	43 of 100 (Notable)
Maunabo	Puerto Rico [United States]	Record daily precipitation	61.7 mm (2.4 in)	43 of 100 (Notable)
Artichoke Lake 1 E	United States	Record daily snowfall	7.6 cm (3.0 in)	43 of 100 (Notable)
Academy 2NE	United States	Record daily snowfall	10.2 cm (4.0 in)	43 of 100 (Notable)
Mather 3 NW	United States	Record daily snowfall	5.1 cm (2.0 in)	43 of 100 (Notable)
Kaneohe 838.1	United States	Record daily precipitation	25.1 mm (1.0 in)	43 of 100 (Notable)
Aibonito 1 S	Puerto Rico [United States]	Record daily precipitation	55.1 mm (2.2 in)	42 of 100 (Notable)
San Simon	United States	Record low minimum temperature	-0.6 C (30.9 F)	42 of 100 (Notable)
Hartwell	United States	Record high minimum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
Louisville 1 E	United States	Record high minimum temperature	19.4 C (66.9 F)	42 of 100 (Notable)
W Liberty 3NW	United States	Record high minimum temperature	15.6 C (60.1 F)	42 of 100 (Notable)
Downing	United States	Record daily precipitation	38.9 mm (1.5 in)	42 of 100 (Notable)
Ellsworth 2W	United States	Record daily snowfall	10.2 cm (4.0 in)	42 of 100 (Notable)
Lewisburg Exp STN	United States	Record high maximum temperature	31.7 C (89.1 F)	42 of 100 (Notable)
Dwtn Charleston	United States	Record high maximum temperature	32.8 C (91.0 F)	42 of 100 (Notable)
Sheffield	United Kingdom	Record high minimum temperature	10.7 C (51.3 F)	41 of 100 (Notable)
Russellville	United States	Record high minimum temperature	19.4 C (66.9 F)	41 of 100 (Notable)
Little Falls 2NNE	United States	Record daily snowfall	5.1 cm (2.0 in)	41 of 100 (Notable)
Carrollton	United States	Record daily precipitation	63.5 mm (2.5 in)	41 of 100 (Notable)
Mocksville 5SE	United States	Record high maximum temperature	33.9 C (93.0 F)	41 of 100 (Notable)
Club Terrace	Australia	Record daily precipitation	80.6 mm (3.2 in)	40 of 100 (Notable)
Markovo	Russia	Record low minimum temperature	-35.4 C (-31.7 F)	40 of 100 (Notable)
Durham	United Kingdom	Record high minimum temperature	9.5 C (49.1 F)	40 of 100 (Notable)
Mancos 1SW	United States	Record low minimum temperature	-9.4 C (15.1 F)	40 of 100 (Notable)
Glendale	United States	Record daily precipitation	62.7 mm (2.5 in)	40 of 100 (Notable)
Cedar Butte	United States	Record daily snowfall	7.6 cm (3.0 in)	40 of 100 (Notable)
Hermosa 3 SSW	United States	Record daily snowfall	5.1 cm (2.0 in)	40 of 100 (Notable)

Counts by Type and Timescale

1,312 records

Records set or tied on 21 April 2002 by type: Highest daily maximum 344, Lowest daily maximum 140, Highest daily minimum 412, Lowest daily minimum 72, Heaviest daily rainfall 120, Heaviest daily snowfall 153, Deepest snow cover 71.

Records on 21 April 2002 by type
Record type	Records
Highest daily maximum	344
Lowest daily maximum	140
Highest daily minimum	412
Lowest daily minimum	72
Heaviest daily rainfall	120
Heaviest daily snowfall	153
Deepest snow cover	71

Records on 21 April 2002 by timescale: all-time 0, monthly 39, daily 1,273.

How Much Records Were Beaten By

948 broken records

Margins by which the 948 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

21 April 2002

Top 20 records on 21 April 2002 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 April 2002	Rockville, US	monthly rain	101.6 mm (4.0 in)	42.2 mm (1.7 in)	84 years	85 of 100 (Exceptional)
21 April 2002	New London, US	daily snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	108 years	62 of 100 (Major)
21 April 2002	McPherson, US	daily rain	49.0 mm (1.9 in)	27.2 mm (1.1 in)	89 years	60 of 100 (Major)
21 April 2002	Winona, US	daily snow depth	10.2 cm (4.0 in)	10.2 cm (4.0 in)	100 years	57 of 100 (Notable)
21 April 2002	Montevideo 1SW, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	108 years	54 of 100 (Notable)
21 April 2002	Wessington 2SE, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	72 years	53 of 100 (Notable)
21 April 2002	Ellsworth 1E, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	92 years	52 of 100 (Notable)
21 April 2002	Shelby 2 NW, US	monthly high min	19.4 C (66.9 F)	0.5 C (0.9 F)	109 years	51 of 100 (Notable)
21 April 2002	Butte, US	daily snowfall	11.9 cm (4.7 in)	9.4 cm (3.7 in)	92 years	49 of 100 (Notable)
21 April 2002	Winner, US	daily snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	92 years	49 of 100 (Notable)
21 April 2002	Windsor, US	daily rain	65.5 mm (2.6 in)	19.0 mm (0.7 in)	71 years	47 of 100 (Notable)
21 April 2002	Longvalley, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	73 years	47 of 100 (Notable)
21 April 2002	Wood, US	daily snowfall	11.4 cm (4.5 in)	11.4 cm (4.5 in)	88 years	47 of 100 (Notable)
21 April 2002	Mondovi, US	daily snowfall	10.2 cm (4.0 in)	8.9 cm (3.5 in)	75 years	47 of 100 (Notable)
21 April 2002	Gainesville, US	monthly high min	19.4 C (66.9 F)	1.1 C (2.0 F)	81 years	46 of 100 (Notable)
21 April 2002	Matfield Green, US	daily rain	54.9 mm (2.2 in)	39.2 mm (1.5 in)	17 years	46 of 100 (Notable)
21 April 2002	Merriman, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	103 years	46 of 100 (Notable)
21 April 2002	Highmore, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	108 years	46 of 100 (Notable)
21 April 2002	Kadoka, US	daily snowfall	8.9 cm (3.5 in)	8.9 cm (3.5 in)	91 years	46 of 100 (Notable)
21 April 2002	Midland, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	105 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

1793 to 2002

Records set or tied on this calendar date in each year from 1793 to 2002. 2002 had 1,312 records.

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

Records on 04-21 in each year
Year	Records
1793	1
1814	1
1820	1
1838	1
1849	2
1851	1
1852	3
1854	1
1858	3
1861	2
1865	3
1866	1
1868	1
1870	1
1875	4
1876	2
1877	1
1879	3
1880	1
1881	1
1882	1
1884	1
1885	2
1888	1
1890	1
1891	1
1892	1
1893	2
1894	4
1895	1
1897	1
1898	2
1899	2
1900	7
1901	17
1902	7
1903	3
1904	10
1905	18
1906	5
1907	17
1908	25
1909	20
1910	33
1911	9
1912	22
1913	14
1914	220
1915	24
1916	64
1917	48
1918	84
1919	31
1920	85
1921	59
1922	70
1923	223
1924	119
1925	295
1926	148
1927	284
1928	269
1929	193
1930	127
1931	358
1932	304
1933	201
1934	497
1935	266
1936	277
1937	416
1938	295
1939	110
1940	462
1941	306
1942	285
1943	481
1944	261
1945	367
1946	448
1947	459
1948	365
1949	448
1950	529
1951	884
1952	665
1953	640
1954	527
1955	607
1956	497
1957	824
1958	329
1959	505
1960	889
1961	647
1962	319
1963	778
1964	1,125
1965	658
1966	756
1967	903
1968	655
1969	388
1970	728
1971	546
1972	593
1973	1,163
1974	528
1975	360
1976	452
1977	854
1978	735
1979	449
1980	1,934
1981	944
1982	1,075
1983	1,366
1984	1,231
1985	1,245
1986	977
1987	1,290
1988	898
1989	1,557
1990	1,463
1991	1,291
1992	1,763
1993	847
1994	859
1995	1,476
1996	788
1997	964
1998	876
1999	752
2000	921
2001	967
2002	1,312
2003	607
2004	586
2005	693
2006	761
2007	480
2008	1,327
2009	983
2010	805
2011	1,053
2012	687
2013	1,015
2014	393
2015	621
2016	587
2017	797
2018	862
2019	731
2020	397
2021	1,608
2022	433
2023	886
2024	754
2025	506
2026	853

Download the Data

Data for records on 2002-04-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Histogram of margins by which records were beaten on 21 April 2002
Margin	Records
0 to 50	862
50 to 100	63
100 to 150	20
150 to 200	1
200 to 250	2