Weather Records on 17 July 1917

62 weather records were set or tied worldwide on 17 July 1917. Highest significance: Komga (Pol), ZA.

Key Facts for 17 July 1917

On 17 July 1917, 62 weather records were set or tied at long-record stations worldwide.
10 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 1 monthly and 60 daily.
Komga (Pol) set a daily record precipitation of 53.3 mm (2.1 in) on 17 July 1917.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 447 records.

Record Map

62 stations

62 station records on 17 July 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Komga (Pol)	South Africa	Record daily precipitation	53.3 mm (2.1 in)	48 of 100 (Notable)
Kei Road (Pol)	South Africa	Record daily precipitation	70.6 mm (2.8 in)	39 of 100 (Notable)
Fairlight Station	Australia	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Strathbogie North	Australia	Record daily precipitation	49.5 mm (1.9 in)	37 of 100 (Notable)
Haparanda	Sweden	Record daily precipitation	52.1 mm (2.1 in)	28 of 100 (Routine)
Westminster	Canada	Record daily precipitation	46.5 mm (1.8 in)	25 of 100 (Routine)
Montgomery Wb City	United States	Record low maximum temperature	26.1 C (79.0 F)	22 of 100 (Routine)
Coondambo	Australia	Record daily precipitation	7.9 mm (0.31 in)	20 of 100 (Routine)
Carrieton (Pamatta)	Australia	Record daily precipitation	17.5 mm (0.7 in)	20 of 100 (Routine)
Belton (Shadow Vale)	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Port Augusta (Carriewerloo STN	Australia	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Panban	Australia	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Pooncarie (Mulurulu Station)	Australia	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
Lake Marmal	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Kinchega	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Port Germein (Telowie)	Australia	Record daily precipitation	8.4 mm (0.33 in)	20 of 100 (Routine)
Barmah East	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Murchison	Australia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Port Germein	Australia	Record daily precipitation	7.4 mm (0.29 in)	20 of 100 (Routine)
Woodstock	Canada	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Koomooloo	Australia	Record daily precipitation	12.7 mm (0.5 in)	19 of 100 (Routine)
Mount Poole	Australia	Record daily precipitation	3.3 mm (0.13 in)	18 of 100 (Routine)
Hillston (Cowl Cowl)	Australia	Record daily precipitation	18.3 mm (0.7 in)	16 of 100 (Routine)
Port Albert	Australia	Record daily precipitation	11.4 mm (0.4 in)	16 of 100 (Routine)
Prince Albert	Canada	Record high maximum temperature	33.3 C (91.9 F)	15 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	20.0 C (68.0 F)	15 of 100 (Routine)
Halifax	Canada	Record high maximum temperature	30.0 C (86.0 F)	15 of 100 (Routine)
Haparanda	Sweden	Record high minimum temperature	17.0 C (62.6 F)	15 of 100 (Routine)
Tempe Downs	Australia	Record daily precipitation	2.0 mm (0.08 in)	13 of 100 (Routine)
Wanaaring Station	Australia	Record daily precipitation	22.9 mm (0.9 in)	13 of 100 (Routine)
Rushworth	Australia	Record daily precipitation	6.9 mm (0.27 in)	13 of 100 (Routine)
Little Rock St Capitol	United States	Record low minimum temperature	18.3 C (64.9 F)	13 of 100 (Routine)
Minnedosa	Canada	Record high maximum temperature	32.2 C (90.0 F)	12 of 100 (Routine)
St Albans	Canada	Record high maximum temperature	36.1 C (97.0 F)	12 of 100 (Routine)
London South	Canada	Record daily precipitation	25.4 mm (1.0 in)	12 of 100 (Routine)
Cullendale	South Africa	Record daily precipitation	16.3 mm (0.6 in)	12 of 100 (Routine)
Marrabel	Australia	Record daily precipitation	12.2 mm (0.5 in)	11 of 100 (Routine)
Warranooke (Glenorchy)	Australia	Record daily precipitation	11.9 mm (0.5 in)	11 of 100 (Routine)
Adelaide (Morphett Vale)	Australia	Record daily precipitation	10.9 mm (0.4 in)	10 of 100 (Routine)
St. Petersburg	Russia	Record daily precipitation	15.0 mm (0.6 in)	10 of 100 (Routine)
Port Augusta West	Australia	Record daily precipitation	1.3 mm (0.05 in)	9 of 100 (Routine)
Miltalie (Poodra)	Australia	Record daily precipitation	5.6 mm (0.22 in)	9 of 100 (Routine)
Boola Boolka	Australia	Record daily precipitation	11.4 mm (0.4 in)	8 of 100 (Routine)
Benalla (Shadforth Street)	Australia	Record daily precipitation	8.6 mm (0.34 in)	8 of 100 (Routine)
Glenthompson (Brie Brie)	Australia	Record daily precipitation	9.4 mm (0.37 in)	8 of 100 (Routine)
Lorne Post Office	Australia	Record daily precipitation	13.2 mm (0.5 in)	8 of 100 (Routine)
Fulham Park	Australia	Record daily precipitation	7.6 mm (0.30 in)	7 of 100 (Routine)
Umea	Sweden	Record high minimum temperature	15.0 C (59.0 F)	7 of 100 (Routine)
Lenoir	United States	Record daily precipitation	21.1 mm (0.8 in)	7 of 100 (Routine)
The Olives	Australia	Record daily precipitation	15.2 mm (0.6 in)	6 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	21.1 C (70.0 F)	6 of 100 (Routine)
Jokkmokk	Sweden	Record high minimum temperature	15.2 C (59.4 F)	6 of 100 (Routine)
Lindsay	Canada	Record low maximum temperature	18.9 C (66.0 F)	5 of 100 (Routine)
Wentworth (Cuthero)	Australia	Record daily precipitation	16.8 mm (0.7 in)	4 of 100 (Routine)
Netley	Australia	Record daily precipitation	5.6 mm (0.22 in)	3 of 100 (Routine)
Woodstock	Canada	Record low maximum temperature	20.6 C (69.1 F)	3 of 100 (Routine)
Mount Bute	Australia	Record daily precipitation	5.3 mm (0.21 in)	2 of 100 (Routine)
Calgary Int'l A	Canada	Record high minimum temperature	13.3 C (55.9 F)	2 of 100 (Routine)
Houston Wb City	United States	Record high minimum temperature	25.0 C (77.0 F)	2 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	24.4 C (75.9 F)	2 of 100 (Routine)

Counts by Type and Timescale

62 records

Records set or tied on 17 July 1917 by type: Highest daily maximum 5, Lowest daily maximum 6, Highest daily minimum 5, Lowest daily minimum 1, Heaviest daily rainfall 45.

Records on 17 July 1917 by type
Record type	Records
Highest daily maximum	5
Lowest daily maximum	6
Highest daily minimum	5
Lowest daily minimum	1
Heaviest daily rainfall	45
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 1917 by timescale: all-time 1, monthly 1, daily 60.

How Much Records Were Beaten By

54 broken records

Margins by which the 54 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 44.7. Ties are not counted.

Top 20 by Significance

17 July 1917

Top 20 records on 17 July 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1917	Komga (Pol), ZA	daily rain	53.3 mm (2.1 in)	44.7 mm (1.8 in)	17 years	48 of 100 (Notable)
17 July 1917	Kei Road (Pol), ZA	monthly rain	70.6 mm (2.8 in)	16.8 mm (0.7 in)	31 years	39 of 100 (Notable)
17 July 1917	Fairlight Station, AU	daily rain	33.0 mm (1.3 in)	24.9 mm (1.0 in)	17 years	38 of 100 (Notable)
17 July 1917	Strathbogie North, AU	daily rain	49.5 mm (1.9 in)	36.8 mm (1.4 in)	22 years	37 of 100 (Notable)
17 July 1917	Haparanda, SE	all-time rain	52.1 mm (2.1 in)	1.2 mm (0.05 in)	4 years	28 of 100 (Routine)
17 July 1917	Westminster, CA	daily rain	46.5 mm (1.8 in)	32.8 mm (1.3 in)	6 years	25 of 100 (Routine)
17 July 1917	Montgomery Wb City, US	daily low max	26.1 C (79.0 F)	3.3 C (5.9 F)	20 years	22 of 100 (Routine)
17 July 1917	Coondambo, AU	daily rain	7.9 mm (0.31 in)	7.9 mm (0.31 in)	30 years	20 of 100 (Routine)
17 July 1917	Carrieton (Pamatta), AU	daily rain	17.5 mm (0.7 in)	11.4 mm (0.4 in)	23 years	20 of 100 (Routine)
17 July 1917	Belton (Shadow Vale), AU	daily rain	24.1 mm (0.9 in)	18.8 mm (0.7 in)	2 years	20 of 100 (Routine)
17 July 1917	Port Augusta (Carriewerloo STN, AU	daily rain	11.2 mm (0.4 in)	7.9 mm (0.31 in)	24 years	20 of 100 (Routine)
17 July 1917	Panban, AU	daily rain	18.8 mm (0.7 in)	10.4 mm (0.4 in)	23 years	20 of 100 (Routine)
17 July 1917	Pooncarie (Mulurulu Station), AU	daily rain	22.4 mm (0.9 in)	11.5 mm (0.5 in)	23 years	20 of 100 (Routine)
17 July 1917	Lake Marmal, AU	daily rain	15.2 mm (0.6 in)	9.4 mm (0.37 in)	18 years	20 of 100 (Routine)
17 July 1917	Kinchega, AU	daily rain	19.1 mm (0.8 in)	6.4 mm (0.25 in)	38 years	20 of 100 (Routine)
17 July 1917	Port Germein (Telowie), AU	daily rain	8.4 mm (0.33 in)	5.9 mm (0.23 in)	32 years	20 of 100 (Routine)
17 July 1917	Barmah East, AU	daily rain	14.0 mm (0.6 in)	9.7 mm (0.38 in)	24 years	20 of 100 (Routine)
17 July 1917	Murchison, AU	daily rain	15.7 mm (0.6 in)	10.6 mm (0.4 in)	11 years	20 of 100 (Routine)
17 July 1917	Port Germein, AU	daily rain	7.4 mm (0.29 in)	3.6 mm (0.14 in)	32 years	20 of 100 (Routine)
17 July 1917	Woodstock, CA	daily rain	22.9 mm (0.9 in)	2.1 mm (0.08 in)	46 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

1793 to 1917

Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 62 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 1917-07-17: 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).

Histogram of margins by which records were beaten on 17 July 1917
Margin	Records
0 to 10	44
10 to 20	6
20 to 30	1
30 to 40	2
40 to 50	1