Weather Records on 17 April 1940

337 weather records were set or tied worldwide on 17 April 1940. Highest significance: El Dorado, US.

Key Facts for 17 April 1940

On 17 April 1940, 337 weather records were set or tied at long-record stations worldwide.
73 were record highs and 34 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 326 daily.
El Dorado set a monthly record daily precipitation of 105.2 mm (4.1 in) on 17 April 1940.
Across 166 earlier years (1799 to 2026) the same calendar date averaged 453 records.

Record Map

337 stations

337 station records on 17 April 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 April 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
El Dorado	United States	Record daily precipitation	105.2 mm (4.1 in)	57 of 100 (Notable)
Burlington	United States	Record daily precipitation	55.9 mm (2.2 in)	50 of 100 (Notable)
Cottonwood Falls	United States	Record daily precipitation	54.1 mm (2.1 in)	50 of 100 (Notable)
Olathe 3E	United States	Record daily precipitation	57.2 mm (2.3 in)	50 of 100 (Notable)
Tshakhuma	South Africa	Record daily precipitation	99.1 mm (3.9 in)	48 of 100 (Notable)
Le Roy	United States	Record daily precipitation	61.7 mm (2.4 in)	48 of 100 (Notable)
Lebo	United States	Record daily precipitation	41.9 mm (1.6 in)	46 of 100 (Notable)
Bella Coola	Canada	Record daily precipitation	43.9 mm (1.7 in)	45 of 100 (Notable)
Beaver Dam	United States	Record daily precipitation	80.0 mm (3.1 in)	45 of 100 (Notable)
Clyde State School	Australia	Record daily precipitation	44.2 mm (1.7 in)	44 of 100 (Notable)
Hugoton	United States	Record daily precipitation	37.1 mm (1.5 in)	44 of 100 (Notable)
Conception	United States	Record daily precipitation	34.5 mm (1.4 in)	42 of 100 (Notable)
Newton	United States	Record daily precipitation	55.1 mm (2.2 in)	40 of 100 (Notable)
Iola 1 W	United States	Record daily precipitation	60.5 mm (2.4 in)	38 of 100 (Notable)
Dawson	United States	Record daily snowfall	12.7 cm (5.0 in)	37 of 100 (Notable)
Rowlesburg 1	United States	Record daily precipitation	46.7 mm (1.8 in)	37 of 100 (Notable)
Elkhart	United States	Record daily snowfall	12.7 cm (5.0 in)	36 of 100 (Notable)
Ottawa	United States	Record daily precipitation	45.7 mm (1.8 in)	36 of 100 (Notable)
Oconto 4 W	United States	Record daily snowfall	15.2 cm (6.0 in)	35 of 100 (Notable)
Eureka 1E	United States	Record daily precipitation	40.6 mm (1.6 in)	34 of 100 (Routine)
Clifton Hill	United States	Record daily precipitation	38.4 mm (1.5 in)	33 of 100 (Routine)
Tiffin	United States	Record daily precipitation	42.9 mm (1.7 in)	33 of 100 (Routine)
Hillsboro	United States	Record daily snowfall	12.7 cm (5.0 in)	33 of 100 (Routine)
Jejuri	India	Record daily precipitation	28.4 mm (1.1 in)	32 of 100 (Routine)
Greensburg	United States	Record daily precipitation	29.2 mm (1.1 in)	32 of 100 (Routine)
Pelee Island	Canada	Record daily precipitation	42.2 mm (1.7 in)	31 of 100 (Routine)
Trinidad	United States	Record daily snowfall	33.0 cm (13.0 in)	31 of 100 (Routine)
Garnett 1 E	United States	Record daily precipitation	41.4 mm (1.6 in)	31 of 100 (Routine)
Pleasanton	United States	Record daily precipitation	84.8 mm (3.3 in)	31 of 100 (Routine)
Steffenville	United States	Record daily precipitation	45.2 mm (1.8 in)	31 of 100 (Routine)
Watertown Wwtp	United States	Record daily snowfall	9.1 cm (3.6 in)	31 of 100 (Routine)
Wichita	United States	Record daily precipitation	31.2 mm (1.2 in)	31 of 100 (Routine)
Fond du Lac Wwtp	United States	Record daily snowfall	7.6 cm (3.0 in)	30 of 100 (Routine)
Two Buttes	United States	Record daily snowfall	12.7 cm (5.0 in)	29 of 100 (Routine)
Tuscola	United States	Record daily precipitation	52.8 mm (2.1 in)	29 of 100 (Routine)
Nevada Wtp	United States	Record daily precipitation	45.2 mm (1.8 in)	29 of 100 (Routine)
Fayette	United States	Record daily precipitation	37.8 mm (1.5 in)	28 of 100 (Routine)
Cimarron 4 SW	United States	Record daily snowfall	10.2 cm (4.0 in)	28 of 100 (Routine)
Lamar	United States	Record daily snowfall	5.6 cm (2.2 in)	27 of 100 (Routine)
Mt Hope	United States	Record daily precipitation	38.1 mm (1.5 in)	27 of 100 (Routine)
Bens Run 1 SSE	United States	Record daily precipitation	29.5 mm (1.2 in)	27 of 100 (Routine)
Windsor	United States	Record daily precipitation	84.1 mm (3.3 in)	26 of 100 (Routine)
Crawfordsville Pwr Plt	United States	Record daily precipitation	57.7 mm (2.3 in)	26 of 100 (Routine)
Stockport	United States	Record daily precipitation	29.2 mm (1.1 in)	26 of 100 (Routine)
Eskridge	United States	Record daily precipitation	35.1 mm (1.4 in)	26 of 100 (Routine)
Fredonia	United States	Record daily precipitation	43.7 mm (1.7 in)	26 of 100 (Routine)
Richfield	United States	Record daily precipitation	33.0 mm (1.3 in)	26 of 100 (Routine)
Tres Piedras	United States	Record daily snowfall	12.7 cm (5.0 in)	26 of 100 (Routine)
Marietta Wtr Wks	United States	Record daily precipitation	29.0 mm (1.1 in)	26 of 100 (Routine)
Lake Charles Chenault	United States	Record daily precipitation	114.3 mm (4.5 in)	26 of 100 (Routine)
Rivers Inlet	Canada	Record daily precipitation	53.3 mm (2.1 in)	25 of 100 (Routine)
Millerton	United States	Record daily precipitation	27.7 mm (1.1 in)	25 of 100 (Routine)
Oakland 1 SE	United States	Record daily precipitation	27.2 mm (1.1 in)	25 of 100 (Routine)
Halsey 2 W	United States	Record daily snowfall	22.9 cm (9.0 in)	25 of 100 (Routine)
Kahuku 912	United States	Record daily precipitation	27.9 mm (1.1 in)	25 of 100 (Routine)
Cairo 3N	United States	Record daily precipitation	39.9 mm (1.6 in)	25 of 100 (Routine)
Ft Valley	United States	Record snow depth	12.7 cm (5.0 in)	24 of 100 (Routine)
Centerville	United States	Record daily precipitation	27.4 mm (1.1 in)	24 of 100 (Routine)
Ft Scott	United States	Record daily precipitation	47.2 mm (1.9 in)	24 of 100 (Routine)
Kirksville	United States	Record daily precipitation	47.8 mm (1.9 in)	24 of 100 (Routine)

Counts by Type and Timescale

337 records

Records set or tied on 17 April 1940 by type: Highest daily maximum 12, Lowest daily maximum 20, Highest daily minimum 61, Lowest daily minimum 14, Heaviest daily rainfall 192, Heaviest daily snowfall 32, Deepest snow cover 6.

Records on 17 April 1940 by type
Record type	Records
Highest daily maximum	12
Lowest daily maximum	20
Highest daily minimum	61
Lowest daily minimum	14
Heaviest daily rainfall	192
Heaviest daily snowfall	32
Deepest snow cover	6

Records on 17 April 1940 by timescale: all-time 0, monthly 11, daily 326.

How Much Records Were Beaten By

287 broken records

Margins by which the 287 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

17 April 1940

Top 20 records on 17 April 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 April 1940	El Dorado, US	monthly rain	105.2 mm (4.1 in)	39.2 mm (1.5 in)	24 years	57 of 100 (Notable)
17 April 1940	Burlington, US	daily rain	55.9 mm (2.2 in)	49.8 mm (2.0 in)	32 years	50 of 100 (Notable)
17 April 1940	Cottonwood Falls, US	daily rain	54.1 mm (2.1 in)	41.4 mm (1.6 in)	32 years	50 of 100 (Notable)
17 April 1940	Olathe 3E, US	daily rain	57.2 mm (2.3 in)	43.5 mm (1.7 in)	23 years	50 of 100 (Notable)
17 April 1940	Tshakhuma, ZA	daily rain	99.1 mm (3.9 in)	87.2 mm (3.4 in)	17 years	48 of 100 (Notable)
17 April 1940	Le Roy, US	daily rain	61.7 mm (2.4 in)	48.5 mm (1.9 in)	18 years	48 of 100 (Notable)
17 April 1940	Lebo, US	daily rain	41.9 mm (1.6 in)	37.1 mm (1.5 in)	18 years	46 of 100 (Notable)
17 April 1940	Bella Coola, CA	daily rain	43.9 mm (1.7 in)	28.7 mm (1.1 in)	16 years	45 of 100 (Notable)
17 April 1940	Beaver Dam, US	daily rain	80.0 mm (3.1 in)	69.8 mm (2.7 in)	7 years	45 of 100 (Notable)
17 April 1940	Clyde State School, AU	daily rain	44.2 mm (1.7 in)	29.5 mm (1.2 in)	19 years	44 of 100 (Notable)
17 April 1940	Hugoton, US	daily rain	37.1 mm (1.5 in)	30.7 mm (1.2 in)	25 years	44 of 100 (Notable)
17 April 1940	Conception, US	daily rain	34.5 mm (1.4 in)	26.6 mm (1.0 in)	32 years	42 of 100 (Notable)
17 April 1940	Newton, US	daily rain	55.1 mm (2.2 in)	31.0 mm (1.2 in)	41 years	40 of 100 (Notable)
17 April 1940	Iola 1 W, US	daily rain	60.5 mm (2.4 in)	37.1 mm (1.5 in)	18 years	38 of 100 (Notable)
17 April 1940	Dawson, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	30 years	37 of 100 (Notable)
17 April 1940	Rowlesburg 1, US	daily rain	46.7 mm (1.8 in)	23.1 mm (0.9 in)	11 years	37 of 100 (Notable)
17 April 1940	Elkhart, US	monthly snowfall	12.7 cm (5.0 in)	5.1 cm (2.0 in)	40 years	36 of 100 (Notable)
17 April 1940	Ottawa, US	daily rain	45.7 mm (1.8 in)	26.6 mm (1.0 in)	23 years	36 of 100 (Notable)
17 April 1940	Oconto 4 W, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	39 years	35 of 100 (Notable)
17 April 1940	Eureka 1E, US	daily rain	40.6 mm (1.6 in)	31.2 mm (1.2 in)	18 years	34 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

1799 to 1940

Records set or tied on this calendar date in each year from 1799 to 1940. 1940 had 337 records.

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

Records on 04-17 in each year
Year	Records
1799	1
1807	1
1808	1
1815	1
1817	1
1818	1
1819	1
1823	1
1825	1
1830	1
1835	3
1837	1
1845	1
1847	2
1851	1
1852	3
1853	1
1854	1
1855	1
1857	1
1858	1
1862	1
1865	2
1868	1
1873	4
1874	1
1875	3
1877	4
1878	2
1880	2
1889	1
1890	2
1891	2
1892	4
1894	5
1895	1
1896	5
1897	6
1898	3
1899	1
1900	2
1901	4
1902	4
1903	5
1904	19
1905	11
1906	14
1907	16
1908	38
1909	7
1910	29
1911	33
1912	27
1913	20
1914	83
1915	30
1916	30
1917	32
1918	35
1919	39
1920	87
1921	148
1922	96
1923	71
1924	74
1925	103
1926	140
1927	256
1928	308
1929	145
1930	238
1931	216
1932	615
1933	261
1934	234
1935	374
1936	308
1937	439
1938	564
1939	618
1940	337
1941	460
1942	415
1943	285
1944	334
1945	475
1946	492
1947	461
1948	622
1949	439
1950	293
1951	441
1952	529
1953	818
1954	650
1955	394
1956	486
1957	277
1958	702
1959	434
1960	553
1961	667
1962	597
1963	702
1964	766
1965	411
1966	409
1967	935
1968	745
1969	728
1970	547
1971	924
1972	546
1973	589
1974	244
1975	666
1976	1,630
1977	906
1978	620
1979	810
1980	675
1981	621
1982	965
1983	1,365
1984	720
1985	917
1986	997
1987	960
1988	1,082
1989	638
1990	1,065
1991	614
1992	1,105
1993	847
1994	1,047
1995	1,211
1996	1,044
1997	889
1998	1,795
1999	1,730
2000	1,082
2001	1,013
2002	2,284
2003	1,037
2004	761
2005	572
2006	1,430
2007	863
2008	842
2009	779
2010	606
2011	982
2012	920
2013	1,796
2014	913
2015	813
2016	977
2017	469
2018	1,585
2019	458
2020	1,165
2021	701
2022	831
2023	628
2024	690
2025	1,058
2026	838

Download the Data

Data for records on 1940-04-17: 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 20	228
20 to 40	38
40 to 60	7
60 to 80	6
80 to 100	3
100 to 120	3
120 to 140	2