Weather Records on 17 July 1940

319 weather records were set or tied worldwide on 17 July 1940. Highest significance: Newport, US.

Key Facts for 17 July 1940

On 17 July 1940, 319 weather records were set or tied at long-record stations worldwide.
54 were record highs and 179 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 310 daily.
Newport set a daily record precipitation of 67.6 mm (2.7 in) on 17 July 1940.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 446 records.

Record Map

319 stations

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

Weather records on 17 July 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Newport	United States	Record daily precipitation	67.6 mm (2.7 in)	52 of 100 (Notable)
Bardstown	United States	Record daily precipitation	64.3 mm (2.5 in)	46 of 100 (Notable)
Elizabethton	United States	Record daily precipitation	51.1 mm (2.0 in)	39 of 100 (Notable)
Dwtn Charleston	United States	Record daily precipitation	85.9 mm (3.4 in)	37 of 100 (Notable)
Loa	United States	Record low maximum temperature	20.0 C (68.0 F)	36 of 100 (Notable)
Hansboro 4 NNE	United States	Record daily precipitation	32.0 mm (1.3 in)	35 of 100 (Notable)
Dhar	India	Record daily precipitation	75.7 mm (3.0 in)	31 of 100 (Routine)
Manawar	India	Record daily precipitation	76.2 mm (3.0 in)	31 of 100 (Routine)
Rocky Mt	United States	Record daily precipitation	49.5 mm (1.9 in)	30 of 100 (Routine)
Glennville 3NW	United States	Record daily precipitation	56.6 mm (2.2 in)	29 of 100 (Routine)
Angus 1 N	United States	Record daily precipitation	32.0 mm (1.3 in)	29 of 100 (Routine)
Moorhead St Teachers C	United States	Record daily precipitation	36.6 mm (1.4 in)	28 of 100 (Routine)
Culpeper	United States	Record daily precipitation	44.5 mm (1.8 in)	28 of 100 (Routine)
Mangalore	India	Record daily precipitation	194.3 mm (7.6 in)	27 of 100 (Routine)
Coldwater St School	United States	Record low minimum temperature	5.0 C (41.0 F)	27 of 100 (Routine)
Grafton	United States	Record daily precipitation	34.3 mm (1.4 in)	27 of 100 (Routine)
Washburn	United States	Record daily precipitation	54.6 mm (2.1 in)	27 of 100 (Routine)
Ewa Plantation 741	United States	Record high maximum temperature	32.8 C (91.0 F)	27 of 100 (Routine)
Kahuku 912	United States	Record high minimum temperature	25.0 C (77.0 F)	27 of 100 (Routine)
Waseca	Canada	Record daily precipitation	25.7 mm (1.0 in)	26 of 100 (Routine)
Yellavaram	India	Record daily precipitation	64.8 mm (2.6 in)	26 of 100 (Routine)
Gurjala(Gurujala)	India	Record daily precipitation	28.7 mm (1.1 in)	26 of 100 (Routine)
Redlands	United States	Record low maximum temperature	25.0 C (77.0 F)	26 of 100 (Routine)
Hilo 86A	United States	Record low minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Kamalpur	India	Record daily precipitation	63.5 mm (2.5 in)	25 of 100 (Routine)
Brawley 2 SW	United States	Record low minimum temperature	13.3 C (55.9 F)	25 of 100 (Routine)
Detroit Lakes 1 NNE	United States	Record daily precipitation	35.1 mm (1.4 in)	25 of 100 (Routine)
Sloan 3 S	United States	Record low maximum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Fort Chipewyan	Canada	Record low minimum temperature	0.6 C (33.1 F)	24 of 100 (Routine)
Fairbank 1 S	United States	Record daily precipitation	39.4 mm (1.6 in)	24 of 100 (Routine)
Nogales	United States	Record low maximum temperature	23.3 C (73.9 F)	24 of 100 (Routine)
San Bernardino F S 226	United States	Record low maximum temperature	27.2 C (81.0 F)	24 of 100 (Routine)
Minonk	United States	Record low minimum temperature	7.2 C (45.0 F)	24 of 100 (Routine)
Turigaria (Kaira)	India	Record daily precipitation	96.5 mm (3.8 in)	23 of 100 (Routine)
Globe Rs	United States	Record low minimum temperature	13.3 C (55.9 F)	23 of 100 (Routine)
Anchorage	United States	Record low maximum temperature	21.7 C (71.1 F)	23 of 100 (Routine)
Jefferson 2 E	United States	Record daily precipitation	42.7 mm (1.7 in)	23 of 100 (Routine)
Mana 1026	United States	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record high maximum temperature	19.8 C (67.6 F)	22 of 100 (Routine)
Gannavaram	India	Record daily precipitation	40.6 mm (1.6 in)	22 of 100 (Routine)
Los Gatos	United States	Record low maximum temperature	20.0 C (68.0 F)	22 of 100 (Routine)
Paso Robles	United States	Record low maximum temperature	21.1 C (70.0 F)	22 of 100 (Routine)
High Brg Lock 7	United States	Record daily precipitation	49.3 mm (1.9 in)	22 of 100 (Routine)
Beckley Va Hospital	United States	Record daily precipitation	38.6 mm (1.5 in)	22 of 100 (Routine)
Saentis	Switzerland	Record daily precipitation	57.7 mm (2.3 in)	21 of 100 (Routine)
Crescent City 3 NNW	United States	Record high minimum temperature	14.4 C (57.9 F)	21 of 100 (Routine)
Phillipsburg	United States	Record low maximum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Ft Stanton	United States	Record daily precipitation	53.3 mm (2.1 in)	21 of 100 (Routine)
Pelzer	United States	Record daily precipitation	45.7 mm (1.8 in)	21 of 100 (Routine)
Russell	Canada	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Ada	United States	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Canyon Ferry	United States	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Zerbst	Germany	Record daily precipitation	15.6 mm (0.6 in)	20 of 100 (Routine)
Hull	United Kingdom	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Kirov	Russia	Record daily precipitation	21.2 mm (0.8 in)	20 of 100 (Routine)
Laramie	United States	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Carson City	United States	Record daily precipitation	1.5 mm (0.06 in)	20 of 100 (Routine)
Ravensfield	Australia	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Hanford 1 S	United States	Record low minimum temperature	11.1 C (52.0 F)	20 of 100 (Routine)
Warner Springs	United States	Record low maximum temperature	26.1 C (79.0 F)	20 of 100 (Routine)

Counts by Type and Timescale

319 records

Records set or tied on 17 July 1940 by type: Highest daily maximum 13, Lowest daily maximum 99, Highest daily minimum 41, Lowest daily minimum 80, Heaviest daily rainfall 86.

Records on 17 July 1940 by type
Record type	Records
Highest daily maximum	13
Lowest daily maximum	99
Highest daily minimum	41
Lowest daily minimum	80
Heaviest daily rainfall	86
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 1940 by timescale: all-time 0, monthly 9, daily 310.

How Much Records Were Beaten By

242 broken records

Margins by which the 242 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 77.5. Ties are not counted.

Top 20 by Significance

17 July 1940

Top 20 records on 17 July 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1940	Newport, US	daily rain	67.6 mm (2.7 in)	51.1 mm (2.0 in)	34 years	52 of 100 (Notable)
17 July 1940	Bardstown, US	daily rain	64.3 mm (2.5 in)	36.4 mm (1.4 in)	40 years	46 of 100 (Notable)
17 July 1940	Elizabethton, US	daily rain	51.1 mm (2.0 in)	25.7 mm (1.0 in)	41 years	39 of 100 (Notable)
17 July 1940	Dwtn Charleston, US	daily rain	85.9 mm (3.4 in)	47.0 mm (1.9 in)	31 years	37 of 100 (Notable)
17 July 1940	Loa, US	daily low max	20.0 C (68.0 F)	6.7 C (12.1 F)	45 years	36 of 100 (Notable)
17 July 1940	Hansboro 4 NNE, US	daily rain	32.0 mm (1.3 in)	28.2 mm (1.1 in)	19 years	35 of 100 (Notable)
17 July 1940	Dhar, IN	daily rain	75.7 mm (3.0 in)	32.5 mm (1.3 in)	39 years	31 of 100 (Routine)
17 July 1940	Manawar, IN	daily rain	76.2 mm (3.0 in)	40.6 mm (1.6 in)	28 years	31 of 100 (Routine)
17 July 1940	Rocky Mt, US	daily rain	49.5 mm (1.9 in)	19.0 mm (0.7 in)	45 years	30 of 100 (Routine)
17 July 1940	Glennville 3NW, US	daily rain	56.6 mm (2.2 in)	26.1 mm (1.0 in)	28 years	29 of 100 (Routine)
17 July 1940	Angus 1 N, US	daily rain	32.0 mm (1.3 in)	21.3 mm (0.8 in)	24 years	29 of 100 (Routine)
17 July 1940	Moorhead St Teachers C, US	daily rain	36.6 mm (1.4 in)	16.3 mm (0.6 in)	35 years	28 of 100 (Routine)
17 July 1940	Culpeper, US	daily rain	44.5 mm (1.8 in)	24.2 mm (1.0 in)	21 years	28 of 100 (Routine)
17 July 1940	Mangalore, IN	daily rain	194.3 mm (7.6 in)	77.5 mm (3.1 in)	4 years	27 of 100 (Routine)
17 July 1940	Coldwater St School, US	monthly low min	5.0 C (41.0 F)	0.6 C (1.1 F)	42 years	27 of 100 (Routine)
17 July 1940	Grafton, US	daily rain	34.3 mm (1.4 in)	27.9 mm (1.1 in)	13 years	27 of 100 (Routine)
17 July 1940	Washburn, US	monthly rain	54.6 mm (2.1 in)	5.3 mm (0.21 in)	29 years	27 of 100 (Routine)
17 July 1940	Ewa Plantation 741, US	monthly high max	32.8 C (91.0 F)	0.6 C (1.1 F)	26 years	27 of 100 (Routine)
17 July 1940	Kahuku 912, US	monthly high min	25.0 C (77.0 F)	0.6 C (1.1 F)	33 years	27 of 100 (Routine)
17 July 1940	Waseca, CA	daily rain	25.7 mm (1.0 in)	15.3 mm (0.6 in)	21 years	26 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

1793 to 1940

Records set or tied on this calendar date in each year from 1793 to 1940. 1940 had 319 records.

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

Records on 07-17 in each year
Year	Records
1793	1
1798	1
1799	1
1801	2
1802	1
1821	1
1827	1
1833	1
1840	1
1842	1
1845	2
1852	1
1862	1
1863	1
1865	2
1866	1
1871	1
1874	1
1875	2
1877	1
1880	1
1881	2
1882	2
1883	5
1884	1
1887	1
1888	2
1889	4
1890	4
1892	5
1893	3
1894	4
1895	1
1896	3
1897	1
1898	2
1899	4
1900	4
1901	6
1902	6
1903	13
1904	4
1905	9
1906	13
1907	12
1908	32
1909	16
1910	8
1911	52
1912	13
1913	26
1914	67
1915	71
1916	27
1917	62
1918	41
1919	45
1920	50
1921	120
1922	206
1923	105
1924	165
1925	275
1926	251
1927	118
1928	116
1929	154
1930	366
1931	492
1932	293
1933	216
1934	438
1935	245
1936	815
1937	313
1938	303
1939	540
1940	319
1941	386
1942	522
1943	321
1944	236
1945	681
1946	523
1947	505
1948	278
1949	405
1950	645
1951	356
1952	772
1953	557
1954	517
1955	512
1956	608
1957	298
1958	693
1959	631
1960	324
1961	408
1962	421
1963	223
1964	481
1965	753
1966	454
1967	965
1968	707
1969	741
1970	486
1971	790
1972	634
1973	680
1974	691
1975	775
1976	1,041
1977	764
1978	794
1979	642
1980	1,137
1981	628
1982	850
1983	1,120
1984	875
1985	483
1986	1,214
1987	1,388
1988	1,239
1989	1,289
1990	953
1991	763
1992	1,055
1993	956
1994	631
1995	917
1996	911
1997	816
1998	1,031
1999	925
2000	1,166
2001	916
2002	995
2003	1,396
2004	908
2005	1,184
2006	1,509
2007	1,218
2008	508
2009	1,218
2010	965
2011	1,101
2012	934
2013	819
2014	1,456
2015	831
2016	679
2017	398
2018	750
2019	477
2020	515
2021	625
2022	791
2023	1,060
2024	814
2025	966
2026	860

Download the Data

Data for records on 1940-07-17: 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 10	201
10 to 20	22
20 to 30	9
30 to 40	6
40 to 50	2
50 to 60	1
60 to 70	0
70 to 80	1