Weather Records on 4 April 1917

36 weather records were set or tied worldwide on 4 April 1917. Highest significance: Bird Rocks, CA.

Key Facts for 4 April 1917

On 4 April 1917, 36 weather records were set or tied at long-record stations worldwide.
4 were record highs and 11 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 34 daily.
Bird Rocks set a monthly record daily precipitation of 50.8 mm (2.0 in) on 4 April 1917.
Across 155 earlier years (1794 to 2026) the same calendar date averaged 507 records.

Record Map

36 stations

36 station records on 4 April 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 April 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bird Rocks	Canada	Record daily precipitation	50.8 mm (2.0 in)	55 of 100 (Notable)
Milan	Italy	Record low minimum temperature	0.8 C (33.4 F)	40 of 100 (Notable)
Somerset East	South Africa	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
New Westminster	Canada	Record daily precipitation	37.1 mm (1.5 in)	31 of 100 (Routine)
Aberdeen (Tnk)	South Africa	Record daily precipitation	33.5 mm (1.3 in)	24 of 100 (Routine)
Enisejsk	Russia	Record daily precipitation	6.2 mm (0.24 in)	20 of 100 (Routine)
Anticosti SW Point	Canada	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Charlottetown	Canada	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Millie	Australia	Record daily precipitation	10.4 mm (0.4 in)	19 of 100 (Routine)
Chatham	Canada	Record daily precipitation	19.8 mm (0.8 in)	19 of 100 (Routine)
Chaplin	Canada	Record daily snowfall	5.1 cm (2.0 in)	18 of 100 (Routine)
Halifax	Canada	Record daily precipitation	23.9 mm (0.9 in)	17 of 100 (Routine)
Hewitt	United States	Record daily precipitation	46.2 mm (1.8 in)	17 of 100 (Routine)
Robe Comparison	Australia	Record low minimum temperature	5.8 C (42.4 F)	16 of 100 (Routine)
Milton Post Office	Australia	Record daily precipitation	21.6 mm (0.9 in)	16 of 100 (Routine)
Malin Head	Ireland	Record daily precipitation	9.3 mm (0.37 in)	15 of 100 (Routine)
Astrakan	Russia	Record high minimum temperature	7.2 C (45.0 F)	15 of 100 (Routine)
Anticosti West Point	Canada	Record daily precipitation	23.1 mm (0.9 in)	13 of 100 (Routine)
Bird Rocks	Canada	Record high minimum temperature	0.6 C (33.1 F)	12 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record low minimum temperature	-16.0 C (3.2 F)	12 of 100 (Routine)
Darwin Post Office	Australia	Record low minimum temperature	22.2 C (72.0 F)	10 of 100 (Routine)
Pitea	Sweden	Record low maximum temperature	-7.0 C (19.4 F)	10 of 100 (Routine)
Willowmore	South Africa	Record daily precipitation	4.3 mm (0.17 in)	9 of 100 (Routine)
Astoria	United States	Record daily precipitation	23.1 mm (0.9 in)	9 of 100 (Routine)
Harnosand	Sweden	Record low maximum temperature	-3.5 C (25.7 F)	8 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record daily precipitation	4.5 mm (0.18 in)	7 of 100 (Routine)
Jokkmokk	Sweden	Record low maximum temperature	-7.1 C (19.2 F)	7 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	-1.3 C (29.7 F)	6 of 100 (Routine)
Concordia ASOS	United States	Record daily precipitation	5.1 mm (0.20 in)	6 of 100 (Routine)
Stornoway Airport	United Kingdom	Record low maximum temperature	5.6 C (42.1 F)	4 of 100 (Routine)
Oran-Hopital Militaire	Algeria	Record low minimum temperature	6.0 C (42.8 F)	3 of 100 (Routine)
Cap Chat	Canada	Record daily snowfall	20.3 cm (8.0 in)	3 of 100 (Routine)
Santa Fe	United States	Record low minimum temperature	-6.7 C (19.9 F)	3 of 100 (Routine)
Halden	Norway	Record snow depth	5.0 cm (2.0 in)	2 of 100 (Routine)
San Diego Wbo	United States	Record high maximum temperature	25.0 C (77.0 F)	2 of 100 (Routine)
Karesuando	Sweden	Record low maximum temperature	-7.5 C (18.5 F)	0 of 100 (Routine)

Counts by Type and Timescale

36 records

Records set or tied on 4 April 1917 by type: Highest daily maximum 1, Lowest daily maximum 5, Highest daily minimum 3, Lowest daily minimum 6, Heaviest daily rainfall 18, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 4 April 1917 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	5
Highest daily minimum	3
Lowest daily minimum	6
Heaviest daily rainfall	18
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 4 April 1917 by timescale: all-time 0, monthly 2, daily 34.

How Much Records Were Beaten By

29 broken records

Margins by which the 29 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 48.0. Ties are not counted.

Top 20 by Significance

4 April 1917

Top 20 records on 4 April 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 April 1917	Bird Rocks, CA	monthly rain	50.8 mm (2.0 in)	22.9 mm (0.9 in)	8 years	55 of 100 (Notable)
4 April 1917	Milan, IT	daily low min	0.8 C (33.4 F)	0.1 C (0.2 F)	108 years	40 of 100 (Notable)
4 April 1917	Somerset East, ZA	daily rain	35.6 mm (1.4 in)	20.4 mm (0.8 in)	26 years	35 of 100 (Notable)
4 April 1917	New Westminster, CA	daily rain	37.1 mm (1.5 in)	16.5 mm (0.6 in)	19 years	31 of 100 (Routine)
4 April 1917	Aberdeen (Tnk), ZA	daily rain	33.5 mm (1.3 in)	16.2 mm (0.6 in)	0 years	24 of 100 (Routine)
4 April 1917	Enisejsk, RU	daily rain	6.2 mm (0.24 in)	4.1 mm (0.16 in)	24 years	20 of 100 (Routine)
4 April 1917	Anticosti SW Point, CA	daily rain	21.3 mm (0.8 in)	12.4 mm (0.5 in)	32 years	20 of 100 (Routine)
4 April 1917	Charlottetown, CA	daily rain	24.1 mm (0.9 in)	6.8 mm (0.27 in)	37 years	20 of 100 (Routine)
4 April 1917	Millie, AU	daily rain	10.4 mm (0.4 in)	10.4 mm (0.4 in)	30 years	19 of 100 (Routine)
4 April 1917	Chatham, CA	daily rain	19.8 mm (0.8 in)	4.3 mm (0.17 in)	31 years	19 of 100 (Routine)
4 April 1917	Chaplin, CA	daily snowfall	5.1 cm (2.0 in)	4.8 cm (1.9 in)	6 years	18 of 100 (Routine)
4 April 1917	Halifax, CA	daily rain	23.9 mm (0.9 in)	3.1 mm (0.12 in)	37 years	17 of 100 (Routine)
4 April 1917	Hewitt, US	daily rain	46.2 mm (1.8 in)	27.9 mm (1.1 in)	6 years	17 of 100 (Routine)
4 April 1917	Robe Comparison, AU	daily low min	5.8 C (42.4 F)	1.4 C (2.5 F)	28 years	16 of 100 (Routine)
4 April 1917	Milton Post Office, AU	daily rain	21.6 mm (0.9 in)	5.3 mm (0.21 in)	34 years	16 of 100 (Routine)
4 April 1917	Malin Head, IE	daily rain	9.3 mm (0.37 in)	0.9 mm (0.04 in)	30 years	15 of 100 (Routine)
4 April 1917	Astrakan, RU	daily high min	7.2 C (45.0 F)	0.8 C (1.4 F)	35 years	15 of 100 (Routine)
4 April 1917	Anticosti West Point, CA	daily rain	23.1 mm (0.9 in)	2.8 mm (0.11 in)	20 years	13 of 100 (Routine)
4 April 1917	Bird Rocks, CA	daily high min	0.6 C (33.1 F)	0.6 C (1.1 F)	24 years	12 of 100 (Routine)
4 April 1917	Oestersund-Froesoen, SE	daily low min	-16.0 C (3.2 F)	0.5 C (0.9 F)	27 years	12 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

1794 to 1917

Records set or tied on this calendar date in each year from 1794 to 1917. 1917 had 36 records.

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

Records on 04-04 in each year
Year	Records
1794	1
1808	1
1809	1
1815	2
1819	1
1853	1
1857	1
1873	1
1874	2
1877	2
1878	1
1879	3
1880	2
1881	3
1882	1
1883	1
1884	1
1885	1
1886	2
1887	1
1888	1
1891	1
1892	6
1893	2
1895	2
1896	3
1897	4
1898	7
1899	4
1900	7
1901	12
1902	2
1903	17
1904	6
1905	23
1906	7
1907	9
1908	20
1909	15
1910	48
1911	55
1912	25
1913	31
1914	13
1915	52
1916	65
1917	36
1918	37
1919	27
1920	89
1921	205
1922	39
1923	101
1924	51
1925	126
1926	206
1927	203
1928	625
1929	1,320
1930	86
1931	201
1932	193
1933	167
1934	656
1935	402
1936	714
1937	344
1938	201
1939	243
1940	392
1941	353
1942	537
1943	456
1944	975
1945	806
1946	459
1947	397
1948	202
1949	458
1950	1,044
1951	352
1952	348
1953	332
1954	742
1955	448
1956	426
1957	984
1958	492
1959	524
1960	756
1961	525
1962	308
1963	586
1964	675
1965	443
1966	469
1967	438
1968	640
1969	424
1970	438
1971	560
1972	695
1973	511
1974	1,356
1975	1,981
1976	353
1977	780
1978	497
1979	984
1980	690
1981	1,393
1982	1,251
1983	1,202
1984	762
1985	865
1986	810
1987	2,317
1988	1,119
1989	668
1990	826
1991	957
1992	1,270
1993	733
1994	726
1995	935
1996	699
1997	1,538
1998	931
1999	1,575
2000	1,371
2001	1,040
2002	989
2003	1,055
2004	782
2005	1,070
2006	911
2007	1,009
2008	860
2009	1,068
2010	758
2011	1,155
2012	830
2013	938
2014	705
2015	452
2016	795
2017	603
2018	1,196
2019	407
2020	914
2021	1,341
2022	1,014
2023	2,058
2024	966
2025	1,330
2026	894

Download the Data

Data for records on 1917-04-04: 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).

Histogram of margins by which records were beaten on 4 April 1917
Margin	Records
0 to 10	21
10 to 20	4
20 to 30	3
30 to 40	0
40 to 50	1