Weather Records on 1 April 1917

80 weather records were set or tied worldwide on 1 April 1917. Highest significance: Ilulissat (Jakobshavn), GL.

Key Facts for 1 April 1917

On 1 April 1917, 80 weather records were set or tied at long-record stations worldwide.
38 were record highs and 18 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 9 monthly and 70 daily.
Ilulissat (Jakobshavn) set an all-time record daily precipitation of 39.0 mm (1.5 in) on 1 April 1917.
Across 160 earlier years (1803 to 2026) the same calendar date averaged 480 records.

Record Map

80 stations

80 station records on 1 April 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 April 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record daily precipitation	39.0 mm (1.5 in)	48 of 100 (Notable)
Newark Liberty Intl AP	United States	Record high maximum temperature	29.4 C (84.9 F)	38 of 100 (Notable)
Darwin Post Office	Australia	Record daily precipitation	108.5 mm (4.3 in)	37 of 100 (Notable)
Oxford	United Kingdom	Record low maximum temperature	4.8 C (40.6 F)	33 of 100 (Routine)
Stornoway Airport	United Kingdom	Record low minimum temperature	-8.9 C (16.0 F)	32 of 100 (Routine)
Washington	United States	Record high minimum temperature	14.4 C (57.9 F)	30 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record low maximum temperature	1.7 C (35.1 F)	27 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record low minimum temperature	-0.7 C (30.7 F)	27 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	28.3 C (82.9 F)	24 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high minimum temperature	11.7 C (53.1 F)	23 of 100 (Routine)
Armagh	United Kingdom	Record low maximum temperature	2.2 C (36.0 F)	22 of 100 (Routine)
Port Dover	Canada	Record high minimum temperature	5.6 C (42.1 F)	21 of 100 (Routine)
Sheffield	United Kingdom	Record low minimum temperature	-5.6 C (21.9 F)	21 of 100 (Routine)
Morgantown 1	United States	Record high minimum temperature	16.7 C (62.1 F)	21 of 100 (Routine)
Port Dover	Canada	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Welland	Canada	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Den Helder-1	Netherlands	Record daily precipitation	10.1 mm (0.4 in)	20 of 100 (Routine)
Windsor Riverside	Canada	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Hamilton	Canada	Record high minimum temperature	4.4 C (39.9 F)	20 of 100 (Routine)
Stornoway Airport	United Kingdom	Record low maximum temperature	0.0 C (32.0 F)	20 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	26.1 C (79.0 F)	20 of 100 (Routine)
Philadelphia City	United States	Record high minimum temperature	12.2 C (54.0 F)	20 of 100 (Routine)
Yalata	Australia	Record daily precipitation	3.6 mm (0.14 in)	19 of 100 (Routine)
Buffalo	United States	Record high minimum temperature	5.6 C (42.1 F)	19 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	22.8 C (73.0 F)	19 of 100 (Routine)
Kirov	Russia	Record daily precipitation	5.6 mm (0.22 in)	18 of 100 (Routine)
Durham	United Kingdom	Record low maximum temperature	0.6 C (33.1 F)	18 of 100 (Routine)
Philadelphia City	United States	Record high maximum temperature	27.2 C (81.0 F)	18 of 100 (Routine)
Port Stanley	Canada	Record high minimum temperature	5.0 C (41.0 F)	17 of 100 (Routine)
Munchen-Nymphenburg	Germany	Record daily precipitation	20.6 mm (0.8 in)	17 of 100 (Routine)
Durham	United Kingdom	Record low minimum temperature	-5.6 C (21.9 F)	17 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	22.2 C (72.0 F)	17 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	29.4 C (84.9 F)	17 of 100 (Routine)
Cet Central England	United Kingdom	Record low maximum temperature	4.1 C (39.4 F)	16 of 100 (Routine)
Armagh	United Kingdom	Record low minimum temperature	-5.1 C (22.8 F)	16 of 100 (Routine)
Sheffield	United Kingdom	Record low maximum temperature	3.3 C (37.9 F)	16 of 100 (Routine)
Vineland	United States	Record high maximum temperature	28.3 C (82.9 F)	16 of 100 (Routine)
Washington	United States	Record high maximum temperature	28.3 C (82.9 F)	16 of 100 (Routine)
Lexington Bluegrass AP	United States	Record daily precipitation	32.0 mm (1.3 in)	16 of 100 (Routine)
Cet Central England	United Kingdom	Record low minimum temperature	-3.7 C (25.3 F)	15 of 100 (Routine)
Vineland	United States	Record high minimum temperature	11.7 C (53.1 F)	15 of 100 (Routine)
World Trade Ctr	United States	Record high minimum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Nemours (Ghazaouet)	Algeria	Record low minimum temperature	6.0 C (42.8 F)	14 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	20.0 C (68.0 F)	14 of 100 (Routine)
Atlantic City Marina	United States	Record high minimum temperature	8.9 C (48.0 F)	13 of 100 (Routine)
Baltimore Customs House	United States	Record high minimum temperature	13.9 C (57.0 F)	13 of 100 (Routine)
Wiarton	Canada	Record daily precipitation	13.2 mm (0.5 in)	12 of 100 (Routine)
State College	United States	Record high maximum temperature	22.2 C (72.0 F)	12 of 100 (Routine)
Tranebjerg	Denmark	Record daily precipitation	5.6 mm (0.22 in)	11 of 100 (Routine)
Cape May 2 NW	United States	Record high minimum temperature	8.9 C (48.0 F)	11 of 100 (Routine)
Buffalo	United States	Record daily precipitation	16.5 mm (0.6 in)	11 of 100 (Routine)
New Westminster	Canada	Record low maximum temperature	4.4 C (39.9 F)	10 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	-1.2 C (29.8 F)	10 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	6.7 C (44.1 F)	9 of 100 (Routine)
Hoorn	Netherlands	Record daily precipitation	3.8 mm (0.15 in)	9 of 100 (Routine)
Port Stanley	Canada	Record daily precipitation	16.8 mm (0.7 in)	8 of 100 (Routine)
London South	Canada	Record high minimum temperature	3.9 C (39.0 F)	8 of 100 (Routine)
Peterborough	Canada	Record high minimum temperature	3.3 C (37.9 F)	8 of 100 (Routine)
Astoria	United States	Record low minimum temperature	0.6 C (33.1 F)	8 of 100 (Routine)
State College	United States	Record high minimum temperature	12.2 C (54.0 F)	8 of 100 (Routine)

Counts by Type and Timescale

80 records

Records set or tied on 1 April 1917 by type: Highest daily maximum 13, Lowest daily maximum 10, Highest daily minimum 25, Lowest daily minimum 8, Heaviest daily rainfall 23, Deepest snow cover 1.

Records on 1 April 1917 by type
Record type	Records
Highest daily maximum	13
Lowest daily maximum	10
Highest daily minimum	25
Lowest daily minimum	8
Heaviest daily rainfall	23
Heaviest daily snowfall	0
Deepest snow cover	1

Records on 1 April 1917 by timescale: all-time 1, monthly 9, daily 70.

How Much Records Were Beaten By

70 broken records

Margins by which the 70 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 67.9. Ties are not counted.

Top 20 by Significance

1 April 1917

Top 20 records on 1 April 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 April 1917	Ilulissat (Jakobshavn), GL	all-time rain	39.0 mm (1.5 in)	2.6 mm (0.10 in)	38 years	48 of 100 (Notable)
1 April 1917	Newark Liberty Intl AP, US	daily high max	29.4 C (84.9 F)	8.3 C (14.9 F)	56 years	38 of 100 (Notable)
1 April 1917	Darwin Post Office, AU	daily rain	108.5 mm (4.3 in)	67.9 mm (2.7 in)	8 years	37 of 100 (Notable)
1 April 1917	Oxford, GB	daily low max	4.8 C (40.6 F)	0.3 C (0.5 F)	77 years	33 of 100 (Routine)
1 April 1917	Stornoway Airport, GB	monthly low min	-8.9 C (16.0 F)	2.2 C (4.0 F)	35 years	32 of 100 (Routine)
1 April 1917	Washington, US	daily high min	14.4 C (57.9 F)	2.5 C (4.5 F)	65 years	30 of 100 (Routine)
1 April 1917	Dublin Phoenix Park, IE	monthly low max	1.7 C (35.1 F)	3.0 C (5.4 F)	8 years	27 of 100 (Routine)
1 April 1917	Dublin Phoenix Park, IE	monthly low min	-0.7 C (30.7 F)	0.2 C (0.4 F)	40 years	27 of 100 (Routine)
1 April 1917	Ny City Cntrl Park, US	daily high max	28.3 C (82.9 F)	7.2 C (13.0 F)	23 years	24 of 100 (Routine)
1 April 1917	Cleveland 2717 Euclid, US	daily high min	11.7 C (53.1 F)	6.1 C (11.0 F)	25 years	23 of 100 (Routine)
1 April 1917	Armagh, GB	monthly low max	2.2 C (36.0 F)	1.0 C (1.8 F)	8 years	22 of 100 (Routine)
1 April 1917	Port Dover, CA	daily high min	5.6 C (42.1 F)	2.8 C (5.0 F)	39 years	21 of 100 (Routine)
1 April 1917	Sheffield, GB	monthly low min	-5.6 C (21.9 F)	1.8 C (3.2 F)	8 years	21 of 100 (Routine)
1 April 1917	Morgantown 1, US	daily high min	16.7 C (62.1 F)	2.8 C (5.0 F)	41 years	21 of 100 (Routine)
1 April 1917	Port Dover, CA	daily rain	23.6 mm (0.9 in)	15.0 mm (0.6 in)	27 years	20 of 100 (Routine)
1 April 1917	Welland, CA	daily rain	21.3 mm (0.8 in)	11.9 mm (0.5 in)	41 years	20 of 100 (Routine)
1 April 1917	Den Helder-1, NL	daily rain	10.1 mm (0.4 in)	3.7 mm (0.15 in)	50 years	20 of 100 (Routine)
1 April 1917	Windsor Riverside, CA	daily rain	12.7 mm (0.5 in)	2.0 mm (0.08 in)	43 years	20 of 100 (Routine)
1 April 1917	Hamilton, CA	daily high min	4.4 C (39.9 F)	0.5 C (0.9 F)	48 years	20 of 100 (Routine)
1 April 1917	Stornoway Airport, GB	monthly low max	0.0 C (32.0 F)	1.1 C (2.0 F)	8 years	20 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

1803 to 1917

Records set or tied on this calendar date in each year from 1803 to 1917. 1917 had 80 records.

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

Records on 04-01 in each year
Year	Records
1803	1
1805	1
1808	1
1813	1
1815	3
1819	1
1830	2
1847	2
1848	1
1850	1
1855	3
1856	1
1861	2
1862	2
1865	1
1869	2
1872	1
1873	1
1874	2
1876	1
1878	3
1879	2
1881	1
1885	1
1887	2
1888	2
1889	2
1891	5
1892	1
1893	2
1896	4
1897	5
1898	3
1899	4
1900	4
1901	4
1902	4
1903	12
1904	29
1905	10
1906	7
1907	24
1908	5
1909	13
1910	26
1911	27
1912	31
1913	35
1914	37
1915	25
1916	35
1917	80
1918	51
1919	165
1920	65
1921	46
1922	98
1923	319
1924	257
1925	111
1926	234
1927	326
1928	194
1929	336
1930	153
1931	846
1932	292
1933	188
1934	153
1935	424
1936	1,248
1937	192
1938	461
1939	226
1940	840
1941	285
1942	209
1943	319
1944	266
1945	880
1946	1,172
1947	390
1948	590
1949	308
1950	455
1951	406
1952	419
1953	249
1954	493
1955	288
1956	744
1957	314
1958	535
1959	821
1960	295
1961	496
1962	652
1963	1,123
1964	951
1965	678
1966	689
1967	928
1968	377
1969	611
1970	894
1971	384
1972	510
1973	680
1974	894
1975	1,806
1976	767
1977	524
1978	1,013
1979	738
1980	797
1981	1,115
1982	884
1983	643
1984	662
1985	826
1986	982
1987	1,762
1988	1,259
1989	1,098
1990	952
1991	693
1992	981
1993	783
1994	739
1995	1,056
1996	996
1997	1,255
1998	1,703
1999	1,341
2000	690
2001	575
2002	985
2003	1,366
2004	926
2005	1,086
2006	929
2007	963
2008	1,457
2009	846
2010	1,022
2011	1,105
2012	1,327
2013	719
2014	657
2015	606
2016	842
2017	792
2018	870
2019	674
2020	719
2021	790
2022	853
2023	1,069
2024	788
2025	779
2026	1,042

Download the Data

Data for records on 1917-04-01: 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	67
10 to 20	2
20 to 30	0
30 to 40	0
40 to 50	0
50 to 60	0
60 to 70	1