Weather Records on 21 July 1917

136 weather records were set or tied worldwide on 21 July 1917. Highest significance: Mount Torrens, AU.

Key Facts for 21 July 1917

On 21 July 1917, 136 weather records were set or tied at long-record stations worldwide.
13 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 135 daily.
Mount Torrens set a daily record precipitation of 47.0 mm (1.9 in) on 21 July 1917.
Across 159 earlier years (1794 to 2026) the same calendar date averaged 469 records.

Record Map

136 stations

136 station records on 21 July 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 July 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mount Torrens	Australia	Record daily precipitation	47.0 mm (1.9 in)	44 of 100 (Notable)
Eugowra Post Office	Australia	Record daily precipitation	25.7 mm (1.0 in)	34 of 100 (Routine)
Lobethal	Australia	Record daily precipitation	61.2 mm (2.4 in)	31 of 100 (Routine)
Dingo Vale	Australia	Record daily precipitation	41.1 mm (1.6 in)	29 of 100 (Routine)
Mount Pleasant	Australia	Record daily precipitation	28.2 mm (1.1 in)	28 of 100 (Routine)
Umzimkulu (Tnk)	South Africa	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Portland	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Port Campbell Post Office	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Corny Point Lighthouse	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Canowindra (Canowindra Street)	Australia	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Forbes (Camp Street)	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Ooma	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Lillimur Estate	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Coonalpyn	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Belton (Shadow Vale)	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Komga (Pol)	South Africa	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Riverton	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Kanmantoo	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Lenoir	United States	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Wandearah North	Australia	Record daily precipitation	8.9 mm (0.35 in)	20 of 100 (Routine)
Condobolin Retirement Village	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Jindera (Wadilock)	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Donald Post Office	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Glenlee	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Burrawang South Station	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Inglewood (Post Office)	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Curnomona (Curnamona)	Australia	Record daily precipitation	4.6 mm (0.18 in)	20 of 100 (Routine)
Eremeran	Australia	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Cooma Lambie Street	Australia	Record daily precipitation	5.1 mm (0.20 in)	20 of 100 (Routine)
Nariel Creek (Simpson)	Australia	Record daily precipitation	35.6 mm (1.4 in)	20 of 100 (Routine)
Farrell Flat	Australia	Record daily precipitation	16.5 mm (0.6 in)	19 of 100 (Routine)
Cudal Post Office	Australia	Record daily precipitation	22.9 mm (0.9 in)	19 of 100 (Routine)
Gumeracha	Australia	Record daily precipitation	27.9 mm (1.1 in)	18 of 100 (Routine)
Talmalmo	Australia	Record daily precipitation	20.6 mm (0.8 in)	18 of 100 (Routine)
Watervale	Australia	Record daily precipitation	20.3 mm (0.8 in)	17 of 100 (Routine)
Port Clinton (Yararoo)	Australia	Record daily precipitation	8.9 mm (0.35 in)	17 of 100 (Routine)
Kongal	Australia	Record daily precipitation	21.1 mm (0.8 in)	17 of 100 (Routine)
Trundle (Murrumbogie)	Australia	Record daily precipitation	14.2 mm (0.6 in)	17 of 100 (Routine)
Wellwood	Australia	Record daily precipitation	23.9 mm (0.9 in)	17 of 100 (Routine)
St Arnaud (Coonooer Bridge)	Australia	Record daily precipitation	14.0 mm (0.6 in)	17 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	15.6 C (60.1 F)	17 of 100 (Routine)
Greenville Dwtn AP	United States	Record daily precipitation	49.5 mm (1.9 in)	17 of 100 (Routine)
Sacramento 5 ESE	United States	Record high minimum temperature	22.2 C (72.0 F)	17 of 100 (Routine)
Hawker (Wilson)	Australia	Record daily precipitation	11.4 mm (0.4 in)	16 of 100 (Routine)
Tarlee	Australia	Record daily precipitation	11.4 mm (0.4 in)	16 of 100 (Routine)
Tumbarumba 1	Australia	Record daily precipitation	24.4 mm (1.0 in)	16 of 100 (Routine)
Kaniva	Australia	Record daily precipitation	23.6 mm (0.9 in)	16 of 100 (Routine)
Cudgewa North	Australia	Record daily precipitation	26.2 mm (1.0 in)	16 of 100 (Routine)
Wilsons Promontory Lighthouse	Australia	Record daily precipitation	30.0 mm (1.2 in)	16 of 100 (Routine)
Minnedosa	Canada	Record high maximum temperature	36.7 C (98.1 F)	16 of 100 (Routine)
Stony Mountain	Canada	Record high maximum temperature	35.0 C (95.0 F)	16 of 100 (Routine)
Woomera (Oakden Hills)	Australia	Record daily precipitation	1.3 mm (0.05 in)	15 of 100 (Routine)
Hawker (Holowilena)	Australia	Record daily precipitation	7.6 mm (0.30 in)	15 of 100 (Routine)
Mannum Council Depot	Australia	Record daily precipitation	6.6 mm (0.26 in)	15 of 100 (Routine)
Bordertown	Australia	Record daily precipitation	22.6 mm (0.9 in)	15 of 100 (Routine)
Restdown	Australia	Record daily precipitation	8.9 mm (0.35 in)	15 of 100 (Routine)
Nicosia	Cyprus	Record high maximum temperature	40.6 C (105.1 F)	15 of 100 (Routine)
Hawker (Warcowie)	Australia	Record daily precipitation	6.9 mm (0.27 in)	14 of 100 (Routine)
North Adelaide	Australia	Record daily precipitation	21.8 mm (0.9 in)	14 of 100 (Routine)
Nekarboo	Australia	Record daily precipitation	7.6 mm (0.30 in)	14 of 100 (Routine)

Counts by Type and Timescale

136 records

Records set or tied on 21 July 1917 by type: Highest daily maximum 8, Lowest daily maximum 4, Highest daily minimum 5, Lowest daily minimum 1, Heaviest daily rainfall 118.

Records on 21 July 1917 by type
Record type	Records
Highest daily maximum	8
Lowest daily maximum	4
Highest daily minimum	5
Lowest daily minimum	1
Heaviest daily rainfall	118
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 July 1917 by timescale: all-time 0, monthly 1, daily 135.

How Much Records Were Beaten By

120 broken records

Margins by which the 120 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 26.7. Ties are not counted.

Top 20 by Significance

21 July 1917

Top 20 records on 21 July 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 July 1917	Mount Torrens, AU	daily rain	47.0 mm (1.9 in)	26.7 mm (1.1 in)	18 years	44 of 100 (Notable)
21 July 1917	Eugowra Post Office, AU	daily rain	25.7 mm (1.0 in)	19.1 mm (0.8 in)	11 years	34 of 100 (Routine)
21 July 1917	Lobethal, AU	monthly rain	61.2 mm (2.4 in)	15.2 mm (0.6 in)	0 years	31 of 100 (Routine)
21 July 1917	Dingo Vale, AU	daily rain	41.1 mm (1.6 in)	20.8 mm (0.8 in)	2 years	29 of 100 (Routine)
21 July 1917	Mount Pleasant, AU	daily rain	28.2 mm (1.1 in)	11.2 mm (0.4 in)	28 years	28 of 100 (Routine)
21 July 1917	Umzimkulu (Tnk), ZA	daily rain	15.7 mm (0.6 in)	15.7 mm (0.6 in)	29 years	20 of 100 (Routine)
21 July 1917	Portland, AU	daily rain	23.4 mm (0.9 in)	12.5 mm (0.5 in)	28 years	20 of 100 (Routine)
21 July 1917	Port Campbell Post Office, AU	daily rain	24.1 mm (0.9 in)	11.4 mm (0.4 in)	28 years	20 of 100 (Routine)
21 July 1917	Corny Point Lighthouse, AU	daily rain	17.8 mm (0.7 in)	7.1 mm (0.28 in)	28 years	20 of 100 (Routine)
21 July 1917	Canowindra (Canowindra Street), AU	daily rain	20.8 mm (0.8 in)	10.6 mm (0.4 in)	21 years	20 of 100 (Routine)
21 July 1917	Forbes (Camp Street), AU	daily rain	16.8 mm (0.7 in)	8.7 mm (0.34 in)	26 years	20 of 100 (Routine)
21 July 1917	Ooma, AU	daily rain	18.0 mm (0.7 in)	10.4 mm (0.4 in)	21 years	20 of 100 (Routine)
21 July 1917	Lillimur Estate, AU	daily rain	22.9 mm (0.9 in)	7.9 mm (0.31 in)	18 years	20 of 100 (Routine)
21 July 1917	Coonalpyn, AU	daily rain	17.8 mm (0.7 in)	7.6 mm (0.30 in)	18 years	20 of 100 (Routine)
21 July 1917	Belton (Shadow Vale), AU	daily rain	15.2 mm (0.6 in)	10.9 mm (0.4 in)	19 years	20 of 100 (Routine)
21 July 1917	Komga (Pol), ZA	daily rain	12.7 mm (0.5 in)	12.7 mm (0.5 in)	31 years	20 of 100 (Routine)
21 July 1917	Riverton, AU	daily rain	21.3 mm (0.8 in)	7.3 mm (0.29 in)	18 years	20 of 100 (Routine)
21 July 1917	Kanmantoo, AU	daily rain	16.8 mm (0.7 in)	6.1 mm (0.24 in)	28 years	20 of 100 (Routine)
21 July 1917	Lenoir, US	daily rain	19.6 mm (0.8 in)	9.4 mm (0.37 in)	43 years	20 of 100 (Routine)
21 July 1917	Wandearah North, AU	daily rain	8.9 mm (0.35 in)	5.9 mm (0.23 in)	26 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

1794 to 1917

Records set or tied on this calendar date in each year from 1794 to 1917. 1917 had 136 records.

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

Records on 07-21 in each year
Year	Records
1794	1
1795	1
1796	1
1797	1
1813	2
1832	2
1837	1
1839	1
1843	1
1844	2
1854	1
1859	3
1865	3
1868	3
1872	1
1876	1
1879	2
1880	1
1881	1
1884	1
1885	1
1886	2
1888	2
1889	3
1890	2
1892	3
1893	3
1894	3
1895	1
1896	3
1897	4
1898	7
1899	2
1900	6
1901	13
1902	12
1903	10
1904	8
1905	13
1906	13
1907	12
1908	25
1909	18
1910	12
1911	37
1912	52
1913	41
1914	48
1915	81
1916	72
1917	136
1918	130
1919	51
1920	33
1921	55
1922	48
1923	132
1924	286
1925	202
1926	401
1927	191
1928	205
1929	360
1930	521
1931	549
1932	322
1933	208
1934	965
1935	236
1936	322
1937	253
1938	638
1939	415
1940	318
1941	226
1942	318
1943	253
1944	716
1945	300
1946	398
1947	795
1948	403
1949	603
1950	662
1951	427
1952	657
1953	351
1954	656
1955	582
1956	490
1957	447
1958	531
1959	940
1960	651
1961	388
1962	263
1963	470
1964	457
1965	748
1966	626
1967	313
1968	334
1969	636
1970	1,241
1971	475
1972	1,046
1973	871
1974	536
1975	380
1976	477
1977	708
1978	1,155
1979	964
1980	926
1981	1,352
1982	588
1983	1,234
1984	764
1985	554
1986	791
1987	1,025
1988	1,015
1989	973
1990	914
1991	812
1992	1,562
1993	866
1994	773
1995	1,247
1996	1,141
1997	849
1998	1,674
1999	814
2000	1,230
2001	889
2002	990
2003	1,250
2004	694
2005	1,420
2006	1,479
2007	1,145
2008	989
2009	1,306
2010	1,148
2011	1,414
2012	815
2013	526
2014	762
2015	704
2016	645
2017	433
2018	942
2019	755
2020	363
2021	574
2022	866
2023	816
2024	873
2025	881
2026	874

Download the Data

Data for records on 1917-07-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 5	80
5 to 10	23
10 to 15	10
15 to 20	5
20 to 25	1
25 to 30	1