Weather Records on 15 April 1921

59 weather records were set or tied worldwide on 15 April 1921. Highest significance: Reading Wb City, US.

Key Facts for 15 April 1921

On 15 April 1921, 59 weather records were set or tied at long-record stations worldwide.
36 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 57 daily.
Reading Wb City set a daily record precipitation of 61.5 mm (2.4 in) on 15 April 1921.
Across 159 earlier years (1801 to 2026) the same calendar date averaged 496 records.

Record Map

59 stations

59 station records on 15 April 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 April 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Reading Wb City	United States	Record daily precipitation	61.5 mm (2.4 in)	40 of 100 (Notable)
Wilmington Wb City	United States	Record daily precipitation	69.1 mm (2.7 in)	29 of 100 (Routine)
Madison Wb City	United States	Record daily snowfall	7.1 cm (2.8 in)	23 of 100 (Routine)
Pointe Au Pere	Canada	Record high maximum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
Chatham	Canada	Record high maximum temperature	18.9 C (66.0 F)	21 of 100 (Routine)
Pitea	Sweden	Record daily precipitation	11.8 mm (0.5 in)	20 of 100 (Routine)
Bjuroklubb	Sweden	Record daily precipitation	9.9 mm (0.39 in)	20 of 100 (Routine)
Haparanda	Sweden	Record daily precipitation	12.0 mm (0.5 in)	20 of 100 (Routine)
Ottawa	Canada	Record high minimum temperature	9.4 C (48.9 F)	20 of 100 (Routine)
Montreal McGill	Canada	Record high minimum temperature	11.1 C (52.0 F)	20 of 100 (Routine)
Galway	Ireland	Record low minimum temperature	-6.7 C (19.9 F)	20 of 100 (Routine)
Concord	United States	Record high minimum temperature	9.4 C (48.9 F)	20 of 100 (Routine)
Dubuque River	United States	Record daily precipitation	25.4 mm (1.0 in)	19 of 100 (Routine)
Ottawa Cda	Canada	Record high minimum temperature	10.0 C (50.0 F)	18 of 100 (Routine)
Port Dover	Canada	Record high minimum temperature	8.3 C (46.9 F)	18 of 100 (Routine)
St. Petersburg	Russia	Record daily precipitation	4.2 mm (0.17 in)	18 of 100 (Routine)
Lincoln UNIV Pwr Plt	United States	Record daily precipitation	23.1 mm (0.9 in)	18 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	11.1 C (52.0 F)	17 of 100 (Routine)
Northfield	United States	Record high minimum temperature	10.0 C (50.0 F)	17 of 100 (Routine)
Uccle	Belgium	Record low maximum temperature	4.7 C (40.5 F)	16 of 100 (Routine)
Washington	United States	Record high minimum temperature	16.1 C (61.0 F)	16 of 100 (Routine)
Columbia Wb City	United States	Record daily precipitation	33.3 mm (1.3 in)	16 of 100 (Routine)
Brome	Canada	Record high minimum temperature	12.2 C (54.0 F)	15 of 100 (Routine)
Fredericton Unb	Canada	Record high maximum temperature	19.4 C (66.9 F)	15 of 100 (Routine)
Harnosand	Sweden	Record daily precipitation	8.2 mm (0.32 in)	15 of 100 (Routine)
Paris	Canada	Record high minimum temperature	9.4 C (48.9 F)	14 of 100 (Routine)
Winnemucca AP	United States	Record low minimum temperature	-7.2 C (19.0 F)	14 of 100 (Routine)
Wilmington Wb City	United States	Record high minimum temperature	18.3 C (64.9 F)	13 of 100 (Routine)
Kongal	Australia	Record daily precipitation	10.7 mm (0.4 in)	12 of 100 (Routine)
Kingston Queens U	Canada	Record high minimum temperature	8.3 C (46.9 F)	12 of 100 (Routine)
Hamilton	Canada	Record high minimum temperature	6.7 C (44.1 F)	12 of 100 (Routine)
Tomsk	Russia	Record low minimum temperature	-14.5 C (5.9 F)	12 of 100 (Routine)
Harrisburg - Coop	United States	Record high minimum temperature	15.0 C (59.0 F)	12 of 100 (Routine)
Spokane Intl AP	United States	Record low maximum temperature	7.2 C (45.0 F)	12 of 100 (Routine)
Holmogadd A	Sweden	Record daily precipitation	5.2 mm (0.20 in)	11 of 100 (Routine)
Sheffield	United Kingdom	Record low minimum temperature	-1.7 C (28.9 F)	11 of 100 (Routine)
Atlantic City Marina	United States	Record high minimum temperature	11.1 C (52.0 F)	11 of 100 (Routine)
Brome	Canada	Record high maximum temperature	18.9 C (66.0 F)	10 of 100 (Routine)
Plymouth	United States	Record high minimum temperature	5.0 C (41.0 F)	10 of 100 (Routine)
Setauket Strong	United States	Record high minimum temperature	12.2 C (54.0 F)	10 of 100 (Routine)
Renfrew	Canada	Record high minimum temperature	9.4 C (48.9 F)	9 of 100 (Routine)
Saint John	Canada	Record high minimum temperature	4.4 C (39.9 F)	9 of 100 (Routine)
Goldberg	Germany	Record daily precipitation	7.7 mm (0.30 in)	9 of 100 (Routine)
Adrian 2 NNE	United States	Record high minimum temperature	10.0 C (50.0 F)	9 of 100 (Routine)
Blue Hill Coop	United States	Record high minimum temperature	10.0 C (50.0 F)	8 of 100 (Routine)
Vilnius	Lithuania	Record daily precipitation	4.7 mm (0.19 in)	7 of 100 (Routine)
Troicko-Pecherskoe	Russia	Record high minimum temperature	5.9 C (42.6 F)	7 of 100 (Routine)
Arhangelsk	Russia	Record high minimum temperature	3.5 C (38.3 F)	6 of 100 (Routine)
Kargopol	Russia	Record high minimum temperature	6.3 C (43.3 F)	6 of 100 (Routine)
Kirov	Russia	Record high minimum temperature	4.0 C (39.2 F)	5 of 100 (Routine)
Fredericton Unb	Canada	Record high minimum temperature	3.3 C (37.9 F)	4 of 100 (Routine)
Guelph Oac	Canada	Record daily precipitation	6.4 mm (0.25 in)	3 of 100 (Routine)
Charlottetown	Canada	Record high maximum temperature	14.4 C (57.9 F)	3 of 100 (Routine)
Yarmouth	Canada	Record high minimum temperature	4.4 C (39.9 F)	2 of 100 (Routine)
Moorestown 4 E	United States	Record high minimum temperature	13.9 C (57.0 F)	2 of 100 (Routine)
Vineland	United States	Record high minimum temperature	12.8 C (55.0 F)	2 of 100 (Routine)
Yarmouth	Canada	Record high maximum temperature	15.0 C (59.0 F)	1 of 100 (Routine)
Santa Fe	United States	Record low maximum temperature	4.4 C (39.9 F)	1 of 100 (Routine)
Houston Wb City	United States	Record high minimum temperature	21.7 C (71.1 F)	1 of 100 (Routine)

Counts by Type and Timescale

59 records

Records set or tied on 15 April 1921 by type: Highest daily maximum 6, Lowest daily maximum 3, Highest daily minimum 30, Lowest daily minimum 4, Heaviest daily rainfall 15, Heaviest daily snowfall 1.

Records on 15 April 1921 by type
Record type	Records
Highest daily maximum	6
Lowest daily maximum	3
Highest daily minimum	30
Lowest daily minimum	4
Heaviest daily rainfall	15
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 15 April 1921 by timescale: all-time 0, monthly 2, daily 57.

How Much Records Were Beaten By

50 broken records

Margins by which the 50 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 58.0. Ties are not counted.

Top 20 by Significance

15 April 1921

Top 20 records on 15 April 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 April 1921	Reading Wb City, US	daily rain	61.5 mm (2.4 in)	33.6 mm (1.3 in)	15 years	40 of 100 (Notable)
15 April 1921	Wilmington Wb City, US	monthly rain	69.1 mm (2.7 in)	2.0 mm (0.08 in)	44 years	29 of 100 (Routine)
15 April 1921	Madison Wb City, US	daily snowfall	7.1 cm (2.8 in)	5.8 cm (2.3 in)	14 years	23 of 100 (Routine)
15 April 1921	Pointe Au Pere, CA	daily high max	15.6 C (60.1 F)	5.6 C (10.1 F)	10 years	21 of 100 (Routine)
15 April 1921	Chatham, CA	daily high max	18.9 C (66.0 F)	1.7 C (3.1 F)	46 years	21 of 100 (Routine)
15 April 1921	Pitea, SE	daily rain	11.8 mm (0.5 in)	5.2 mm (0.20 in)	48 years	20 of 100 (Routine)
15 April 1921	Bjuroklubb, SE	daily rain	9.9 mm (0.39 in)	2.7 mm (0.11 in)	34 years	20 of 100 (Routine)
15 April 1921	Haparanda, SE	daily rain	12.0 mm (0.5 in)	3.0 mm (0.12 in)	27 years	20 of 100 (Routine)
15 April 1921	Ottawa, CA	daily high min	9.4 C (48.9 F)	4.4 C (7.9 F)	20 years	20 of 100 (Routine)
15 April 1921	Montreal McGill, CA	daily high min	11.1 C (52.0 F)	3.9 C (7.0 F)	24 years	20 of 100 (Routine)
15 April 1921	Galway, IE	monthly low min	-6.7 C (19.9 F)	1.1 C (2.0 F)	4 years	20 of 100 (Routine)
15 April 1921	Concord, US	daily high min	9.4 C (48.9 F)	1.1 C (2.0 F)	44 years	20 of 100 (Routine)
15 April 1921	Dubuque River, US	daily rain	25.4 mm (1.0 in)	5.6 mm (0.22 in)	34 years	19 of 100 (Routine)
15 April 1921	Ottawa Cda, CA	daily high min	10.0 C (50.0 F)	3.9 C (7.0 F)	24 years	18 of 100 (Routine)
15 April 1921	Port Dover, CA	daily high min	8.3 C (46.9 F)	1.1 C (2.0 F)	40 years	18 of 100 (Routine)
15 April 1921	St. Petersburg, RU	daily rain	4.2 mm (0.17 in)	1.6 mm (0.06 in)	33 years	18 of 100 (Routine)
15 April 1921	Lincoln UNIV Pwr Plt, US	daily rain	23.1 mm (0.9 in)	8.9 mm (0.35 in)	20 years	18 of 100 (Routine)
15 April 1921	Cape May 2 NW, US	daily high min	11.1 C (52.0 F)	0.5 C (0.9 F)	42 years	17 of 100 (Routine)
15 April 1921	Northfield, US	daily high min	10.0 C (50.0 F)	3.9 C (7.0 F)	22 years	17 of 100 (Routine)
15 April 1921	Uccle, BE	daily low max	4.7 C (40.5 F)	0.3 C (0.5 F)	28 years	16 of 100 (Routine)

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 1921

Records set or tied on this calendar date in each year from 1801 to 1921. 1921 had 59 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 1921-04-15: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	47
10 to 20	1
20 to 30	0
30 to 40	1
40 to 50	0
50 to 60	1