Weather Records on 17 July 1921

120 weather records were set or tied worldwide on 17 July 1921. Highest significance: Clydebank, AU.

Key Facts for 17 July 1921

On 17 July 1921, 120 weather records were set or tied at long-record stations worldwide.
24 were record highs and 5 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 119 daily.
Clydebank set a daily record precipitation of 48.3 mm (1.9 in) on 17 July 1921.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 447 records.

Record Map

120 stations

120 station records on 17 July 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 1921: highest significance records shown on the map
Station	Country	Type	Value	Significance
Clydebank	Australia	Record daily precipitation	48.3 mm (1.9 in)	45 of 100 (Notable)
Beenak	Australia	Record daily precipitation	51.6 mm (2.0 in)	45 of 100 (Notable)
Blackwarry	Australia	Record daily precipitation	50.8 mm (2.0 in)	43 of 100 (Notable)
Sale Mercury Office	Australia	Record daily precipitation	30.5 mm (1.2 in)	41 of 100 (Notable)
Outtrim	Australia	Record daily precipitation	47.5 mm (1.9 in)	41 of 100 (Notable)
Sale	Australia	Record daily precipitation	29.2 mm (1.1 in)	40 of 100 (Notable)
Coleraine (Tulse Hill)	Australia	Record daily precipitation	26.9 mm (1.1 in)	40 of 100 (Notable)
Carrajung Post Office	Australia	Record daily precipitation	37.1 mm (1.5 in)	39 of 100 (Notable)
Narre Warren North (Narre Warr	Australia	Record daily precipitation	35.3 mm (1.4 in)	39 of 100 (Notable)
Maffra Shire Hall	Australia	Record daily precipitation	35.3 mm (1.4 in)	38 of 100 (Notable)
Gembrook	Australia	Record daily precipitation	39.4 mm (1.6 in)	30 of 100 (Routine)
Lilydale	Australia	Record daily precipitation	29.0 mm (1.1 in)	30 of 100 (Routine)
Coranderrk Badger Weir	Australia	Record daily precipitation	27.4 mm (1.1 in)	26 of 100 (Routine)
Huron Rgnl AP	United States	Record daily precipitation	38.4 mm (1.5 in)	26 of 100 (Routine)
Foster (Post Office)	Australia	Record daily precipitation	32.5 mm (1.3 in)	25 of 100 (Routine)
Ringwood 2	Australia	Record daily precipitation	26.2 mm (1.0 in)	25 of 100 (Routine)
Galway	Ireland	Record high maximum temperature	25.0 C (77.0 F)	24 of 100 (Routine)
Lucindale Post Office	Australia	Record daily precipitation	26.4 mm (1.0 in)	21 of 100 (Routine)
Kew	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Smeaton Weir	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Enfield	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Trawalla	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Amphitheatre	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Berrybank	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Beales Reservoir	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Durdidwarrah	Australia	Record daily precipitation	13.5 mm (0.5 in)	20 of 100 (Routine)
Hawkesdale (Post Office)	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Naracoorte Cave Range	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Yarram	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Myrniong	Australia	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Yan Yean	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Hamilton	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Rosedale	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Woodside	Australia	Record daily precipitation	21.3 mm (0.8 in)	20 of 100 (Routine)
Beaufort (Stoneleigh)	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Mirranatwa (Bullawin Park)	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Cowes	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Brighton Middle	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Malmsbury Reservoir	Australia	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Ararat Post Office	Australia	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Portland	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Karnak (Rosedale)	Australia	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Casterton (Warrock)	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Little River (Mount Rothwell)	Australia	Record daily precipitation	7.9 mm (0.31 in)	20 of 100 (Routine)
Newlyn Reservoir	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Naracoorte	Australia	Record daily precipitation	21.1 mm (0.8 in)	20 of 100 (Routine)
Clunes	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Willaura (Yarram Park)	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Penshurst (Post Office)	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Sydney	Canada	Record low minimum temperature	6.1 C (43.0 F)	20 of 100 (Routine)
Eversley	Australia	Record daily precipitation	21.6 mm (0.9 in)	19 of 100 (Routine)
Murrumbeena Leeds Grove	Australia	Record daily precipitation	20.6 mm (0.8 in)	19 of 100 (Routine)
Dunkeld	Australia	Record daily precipitation	16.5 mm (0.6 in)	19 of 100 (Routine)
Caulfield (Racecourse)	Australia	Record daily precipitation	18.5 mm (0.7 in)	18 of 100 (Routine)
Hastings Post Office	Australia	Record daily precipitation	23.9 mm (0.9 in)	18 of 100 (Routine)
Greensborough	Australia	Record daily precipitation	20.1 mm (0.8 in)	18 of 100 (Routine)
Victoria Valley	Australia	Record daily precipitation	15.2 mm (0.6 in)	18 of 100 (Routine)
Milwaukee Wb City	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)

Counts by Type and Timescale

120 records

Records set or tied on 17 July 1921 by type: Highest daily maximum 15, Lowest daily maximum 2, Highest daily minimum 9, Lowest daily minimum 3, Heaviest daily rainfall 91.

Records on 17 July 1921 by type
Record type	Records
Highest daily maximum	15
Lowest daily maximum	2
Highest daily minimum	9
Lowest daily minimum	3
Heaviest daily rainfall	91
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 1921 by timescale: all-time 0, monthly 1, daily 119.

How Much Records Were Beaten By

113 broken records

Margins by which the 113 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 31.0. Ties are not counted.

Top 20 by Significance

17 July 1921

Top 20 records on 17 July 1921 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1921	Clydebank, AU	daily rain	48.3 mm (1.9 in)	30.0 mm (1.2 in)	7 years	45 of 100 (Notable)
17 July 1921	Beenak, AU	daily rain	51.6 mm (2.0 in)	26.2 mm (1.0 in)	33 years	45 of 100 (Notable)
17 July 1921	Blackwarry, AU	daily rain	50.8 mm (2.0 in)	31.0 mm (1.2 in)	21 years	43 of 100 (Notable)
17 July 1921	Sale Mercury Office, AU	daily rain	30.5 mm (1.2 in)	18.1 mm (0.7 in)	7 years	41 of 100 (Notable)
17 July 1921	Outtrim, AU	daily rain	47.5 mm (1.9 in)	24.1 mm (0.9 in)	20 years	41 of 100 (Notable)
17 July 1921	Sale, AU	daily rain	29.2 mm (1.1 in)	17.5 mm (0.7 in)	7 years	40 of 100 (Notable)
17 July 1921	Coleraine (Tulse Hill), AU	daily rain	26.9 mm (1.1 in)	18.0 mm (0.7 in)	10 years	40 of 100 (Notable)
17 July 1921	Carrajung Post Office, AU	daily rain	37.1 mm (1.5 in)	27.4 mm (1.1 in)	7 years	39 of 100 (Notable)
17 July 1921	Narre Warren North (Narre Warr, AU	daily rain	35.3 mm (1.4 in)	17.3 mm (0.7 in)	12 years	39 of 100 (Notable)
17 July 1921	Maffra Shire Hall, AU	daily rain	35.3 mm (1.4 in)	22.3 mm (0.9 in)	7 years	38 of 100 (Notable)
17 July 1921	Gembrook, AU	daily rain	39.4 mm (1.6 in)	21.1 mm (0.8 in)	12 years	30 of 100 (Routine)
17 July 1921	Lilydale, AU	daily rain	29.0 mm (1.1 in)	16.3 mm (0.6 in)	12 years	30 of 100 (Routine)
17 July 1921	Coranderrk Badger Weir, AU	daily rain	27.4 mm (1.1 in)	12.4 mm (0.5 in)	12 years	26 of 100 (Routine)
17 July 1921	Huron Rgnl AP, US	daily rain	38.4 mm (1.5 in)	25.4 mm (1.0 in)	6 years	26 of 100 (Routine)
17 July 1921	Foster (Post Office), AU	daily rain	32.5 mm (1.3 in)	9.6 mm (0.38 in)	33 years	25 of 100 (Routine)
17 July 1921	Ringwood 2, AU	daily rain	26.2 mm (1.0 in)	13.2 mm (0.5 in)	12 years	25 of 100 (Routine)
17 July 1921	Galway, IE	daily high max	25.0 C (77.0 F)	0.6 C (1.1 F)	57 years	24 of 100 (Routine)
17 July 1921	Lucindale Post Office, AU	daily rain	26.4 mm (1.0 in)	8.6 mm (0.34 in)	15 years	21 of 100 (Routine)
17 July 1921	Kew, AU	daily rain	21.3 mm (0.8 in)	15.2 mm (0.6 in)	15 years	20 of 100 (Routine)
17 July 1921	Smeaton Weir, AU	daily rain	21.1 mm (0.8 in)	14.5 mm (0.6 in)	27 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 1921

Records set or tied on this calendar date in each year from 1793 to 1921. 1921 had 120 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 1921-07-17: 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 5	47
5 to 10	34
10 to 15	17
15 to 20	7
20 to 25	3
25 to 30	3
30 to 35	2