Weather Records on 20 July 1917

57 weather records were set or tied worldwide on 20 July 1917. Highest significance: Lund, SE.

Key Facts for 20 July 1917

On 20 July 1917, 57 weather records were set or tied at long-record stations worldwide.
7 were record highs and 6 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 0 monthly and 57 daily.
Lund set a daily record precipitation of 50.0 mm (2.0 in) on 20 July 1917.
Across 161 earlier years (1809 to 2026) the same calendar date averaged 462 records.

Record Map

57 stations

57 station records on 20 July 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 July 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lund	Sweden	Record daily precipitation	50.0 mm (2.0 in)	52 of 100 (Notable)
Kingscote	Australia	Record daily precipitation	27.7 mm (1.1 in)	38 of 100 (Notable)
Macclesfield	Australia	Record daily precipitation	35.6 mm (1.4 in)	37 of 100 (Notable)
Sacramento 5 ESE	United States	Record high minimum temperature	23.9 C (75.0 F)	35 of 100 (Notable)
Mount Barker	Australia	Record daily precipitation	33.8 mm (1.3 in)	32 of 100 (Routine)
Battunga	Australia	Record daily precipitation	32.8 mm (1.3 in)	29 of 100 (Routine)
Echunga Golf Course	Australia	Record daily precipitation	31.0 mm (1.2 in)	27 of 100 (Routine)
Uppsala_Aut	Sweden	Record daily precipitation	28.4 mm (1.1 in)	26 of 100 (Routine)
Meadows	Australia	Record daily precipitation	35.1 mm (1.4 in)	24 of 100 (Routine)
Hahndorf	Australia	Record daily precipitation	34.8 mm (1.4 in)	22 of 100 (Routine)
Yarmouth	Canada	Record low maximum temperature	14.4 C (57.9 F)	22 of 100 (Routine)
Kanmantoo	Australia	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Cape Willoughby	Australia	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Umzimkulu (Tnk)	South Africa	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Callington	Australia	Record daily precipitation	15.5 mm (0.6 in)	20 of 100 (Routine)
Burrawang South Station	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Gysinge	Sweden	Record daily precipitation	41.0 mm (1.6 in)	20 of 100 (Routine)
Sacramento 5 ESE	United States	Record high maximum temperature	41.7 C (107.1 F)	20 of 100 (Routine)
Nairne	Australia	Record daily precipitation	25.4 mm (1.0 in)	19 of 100 (Routine)
Bridgewater	Australia	Record daily precipitation	41.1 mm (1.6 in)	18 of 100 (Routine)
Irkutsk	Russia	Record low minimum temperature	1.0 C (33.8 F)	18 of 100 (Routine)
Houston Wb City	United States	Record daily precipitation	52.8 mm (2.1 in)	18 of 100 (Routine)
Tumby Bay (Warratta Vale)	Australia	Record daily precipitation	15.7 mm (0.6 in)	17 of 100 (Routine)
Corny Point Lighthouse	Australia	Record daily precipitation	13.2 mm (0.5 in)	17 of 100 (Routine)
Naracoorte Cave Range	Australia	Record daily precipitation	24.1 mm (0.9 in)	17 of 100 (Routine)
Denman (Martindale)	Australia	Record daily precipitation	10.7 mm (0.4 in)	17 of 100 (Routine)
Falun	Sweden	Record daily precipitation	31.7 mm (1.2 in)	17 of 100 (Routine)
Skara 1	Sweden	Record daily precipitation	19.6 mm (0.8 in)	17 of 100 (Routine)
Little Rock St Capitol	United States	Record low maximum temperature	26.1 C (79.0 F)	17 of 100 (Routine)
Goonumbla (Coradgery)	Australia	Record daily precipitation	21.6 mm (0.9 in)	16 of 100 (Routine)
Adelaide West Terrace	Australia	Record low maximum temperature	11.0 C (51.8 F)	15 of 100 (Routine)
Wellington East	Australia	Record daily precipitation	7.4 mm (0.29 in)	15 of 100 (Routine)
Florida Station	Australia	Record daily precipitation	10.4 mm (0.4 in)	15 of 100 (Routine)
Astrakan	Russia	Record daily precipitation	4.2 mm (0.17 in)	15 of 100 (Routine)
Ashbourne	Australia	Record daily precipitation	24.1 mm (0.9 in)	13 of 100 (Routine)
Coonalpyn	Australia	Record daily precipitation	10.4 mm (0.4 in)	13 of 100 (Routine)
Camden 1	United States	Record daily precipitation	35.3 mm (1.4 in)	13 of 100 (Routine)
Johnsonville	United States	Record daily precipitation	33.5 mm (1.3 in)	13 of 100 (Routine)
Yudnapinna	Australia	Record daily precipitation	6.6 mm (0.26 in)	12 of 100 (Routine)
Marrabel	Australia	Record daily precipitation	19.1 mm (0.8 in)	12 of 100 (Routine)
Kologha (Bos)	South Africa	Record daily precipitation	0.3 mm (0.01 in)	12 of 100 (Routine)
Bimbowrie	Australia	Record daily precipitation	9.4 mm (0.37 in)	11 of 100 (Routine)
Nariel Creek (Simpson)	Australia	Record daily precipitation	27.9 mm (1.1 in)	10 of 100 (Routine)
Old Baratta Homestead	Australia	Record daily precipitation	6.4 mm (0.25 in)	9 of 100 (Routine)
Victoria Valley	Australia	Record daily precipitation	6.9 mm (0.27 in)	8 of 100 (Routine)
Prince Albert	Canada	Record high minimum temperature	13.3 C (55.9 F)	8 of 100 (Routine)
Elliston	Australia	Record daily precipitation	15.2 mm (0.6 in)	7 of 100 (Routine)
Vasilevici	Belarus	Record daily precipitation	24.3 mm (1.0 in)	7 of 100 (Routine)
Streaky Bay	Australia	Record daily precipitation	10.9 mm (0.4 in)	5 of 100 (Routine)
Gulargambone (Yalcogrin St)	Australia	Record daily precipitation	8.9 mm (0.35 in)	4 of 100 (Routine)
Saint John	Canada	Record low maximum temperature	13.9 C (57.0 F)	4 of 100 (Routine)
Charlottetown	Canada	Record high minimum temperature	18.3 C (64.9 F)	3 of 100 (Routine)
Anticosti SW Point	Canada	Record high minimum temperature	15.0 C (59.0 F)	2 of 100 (Routine)
Boras	Sweden	Record high minimum temperature	15.0 C (59.0 F)	1 of 100 (Routine)
Houston Wb City	United States	Record low minimum temperature	20.6 C (69.1 F)	1 of 100 (Routine)
Calgary Int'l A	Canada	Record high maximum temperature	32.2 C (90.0 F)	0 of 100 (Routine)
Astoria	United States	Record daily precipitation	0.3 mm (0.01 in)	0 of 100 (Routine)

Counts by Type and Timescale

57 records

Records set or tied on 20 July 1917 by type: Highest daily maximum 2, Lowest daily maximum 4, Highest daily minimum 5, Lowest daily minimum 2, Heaviest daily rainfall 44.

Records on 20 July 1917 by type
Record type	Records
Highest daily maximum	2
Lowest daily maximum	4
Highest daily minimum	5
Lowest daily minimum	2
Heaviest daily rainfall	44
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 July 1917 by timescale: all-time 0, monthly 0, daily 57.

How Much Records Were Beaten By

50 broken records

Margins by which the 50 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 41.5. Ties are not counted.

Top 20 by Significance

20 July 1917

Top 20 records on 20 July 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 July 1917	Lund, SE	daily rain	50.0 mm (2.0 in)	41.5 mm (1.6 in)	23 years	52 of 100 (Notable)
20 July 1917	Kingscote, AU	daily rain	27.7 mm (1.1 in)	17.5 mm (0.7 in)	19 years	38 of 100 (Notable)
20 July 1917	Macclesfield, AU	daily rain	35.6 mm (1.4 in)	19.1 mm (0.8 in)	19 years	37 of 100 (Notable)
20 July 1917	Sacramento 5 ESE, US	daily high min	23.9 C (75.0 F)	5.6 C (10.1 F)	35 years	35 of 100 (Notable)
20 July 1917	Mount Barker, AU	daily rain	33.8 mm (1.3 in)	15.8 mm (0.6 in)	21 years	32 of 100 (Routine)
20 July 1917	Battunga, AU	daily rain	32.8 mm (1.3 in)	15.3 mm (0.6 in)	11 years	29 of 100 (Routine)
20 July 1917	Echunga Golf Course, AU	daily rain	31.0 mm (1.2 in)	15.0 mm (0.6 in)	11 years	27 of 100 (Routine)
20 July 1917	Uppsala_Aut, SE	daily rain	28.4 mm (1.1 in)	2.9 mm (0.11 in)	49 years	26 of 100 (Routine)
20 July 1917	Meadows, AU	daily rain	35.1 mm (1.4 in)	12.2 mm (0.5 in)	19 years	24 of 100 (Routine)
20 July 1917	Hahndorf, AU	daily rain	34.8 mm (1.4 in)	11.4 mm (0.4 in)	21 years	22 of 100 (Routine)
20 July 1917	Yarmouth, CA	daily low max	14.4 C (57.9 F)	2.3 C (4.1 F)	32 years	22 of 100 (Routine)
20 July 1917	Kanmantoo, AU	daily rain	24.9 mm (1.0 in)	11.2 mm (0.4 in)	21 years	20 of 100 (Routine)
20 July 1917	Cape Willoughby, AU	daily rain	20.8 mm (0.8 in)	7.3 mm (0.29 in)	28 years	20 of 100 (Routine)
20 July 1917	Umzimkulu (Tnk), ZA	daily rain	11.7 mm (0.5 in)	10.9 mm (0.4 in)	15 years	20 of 100 (Routine)
20 July 1917	Callington, AU	daily rain	15.5 mm (0.6 in)	5.8 mm (0.23 in)	21 years	20 of 100 (Routine)
20 July 1917	Burrawang South Station, AU	daily rain	17.8 mm (0.7 in)	7.1 mm (0.28 in)	21 years	20 of 100 (Routine)
20 July 1917	Gysinge, SE	daily rain	41.0 mm (1.6 in)	8.9 mm (0.35 in)	19 years	20 of 100 (Routine)
20 July 1917	Sacramento 5 ESE, US	daily high max	41.7 C (107.1 F)	3.9 C (7.0 F)	25 years	20 of 100 (Routine)
20 July 1917	Nairne, AU	daily rain	25.4 mm (1.0 in)	6.6 mm (0.26 in)	21 years	19 of 100 (Routine)
20 July 1917	Bridgewater, AU	daily rain	41.1 mm (1.6 in)	11.4 mm (0.4 in)	11 years	18 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

1809 to 1917

Records set or tied on this calendar date in each year from 1809 to 1917. 1917 had 57 records.

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

Records on 07-20 in each year
Year	Records
1809	1
1810	1
1811	2
1832	2
1844	2
1850	1
1859	2
1863	1
1865	4
1866	1
1867	1
1868	1
1870	1
1872	1
1874	2
1876	1
1877	2
1879	3
1880	1
1881	2
1882	1
1883	2
1885	1
1886	2
1887	1
1888	1
1889	2
1890	5
1892	7
1893	1
1894	1
1895	1
1897	4
1898	2
1899	4
1900	9
1901	3
1902	13
1903	6
1904	10
1905	6
1906	8
1907	12
1908	31
1909	6
1910	27
1911	12
1912	33
1913	28
1914	20
1915	163
1916	117
1917	57
1918	53
1919	40
1920	16
1921	55
1922	52
1923	173
1924	112
1925	125
1926	411
1927	106
1928	366
1929	480
1930	598
1931	362
1932	338
1933	201
1934	857
1935	386
1936	358
1937	213
1938	392
1939	336
1940	325
1941	270
1942	609
1943	326
1944	470
1945	278
1946	482
1947	635
1948	385
1949	807
1950	563
1951	448
1952	488
1953	316
1954	512
1955	377
1956	545
1957	351
1958	536
1959	605
1960	758
1961	338
1962	327
1963	457
1964	416
1965	1,110
1966	469
1967	455
1968	389
1969	649
1970	890
1971	619
1972	1,062
1973	804
1974	489
1975	470
1976	580
1977	899
1978	663
1979	1,249
1980	925
1981	1,048
1982	580
1983	1,117
1984	799
1985	604
1986	848
1987	1,156
1988	1,103
1989	1,183
1990	724
1991	1,024
1992	1,137
1993	901
1994	611
1995	961
1996	1,365
1997	903
1998	1,682
1999	815
2000	1,393
2001	755
2002	986
2003	1,313
2004	978
2005	1,266
2006	1,487
2007	1,124
2008	663
2009	1,533
2010	1,154
2011	1,339
2012	817
2013	850
2014	1,000
2015	812
2016	744
2017	398
2018	930
2019	867
2020	524
2021	683
2022	1,108
2023	812
2024	737
2025	680
2026	863

Download the Data

Data for records on 1917-07-20: 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 20 July 1917
Margin	Records
0 to 10	37
10 to 20	11
20 to 30	1
30 to 40	0
40 to 50	1