Weather Records on 30 September 1917

19 weather records were set or tied worldwide on 30 September 1917. Highest significance: Bathurst Gaol, AU.

Key Facts for 30 September 1917

On 30 September 1917, 19 weather records were set or tied at long-record stations worldwide.
5 were record highs and 0 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 18 daily.
Bathurst Gaol set a daily record high minimum temperature of 12.8 C (55.0 F) on 30 September 1917.
Across 161 earlier years (1806 to 2026) the same calendar date averaged 442 records.

Record Map

19 stations

19 station records on 30 September 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 30 September 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Bathurst Gaol	Australia	Record high minimum temperature	12.8 C (55.0 F)	26 of 100 (Routine)
Camden 3 W	United States	Record daily precipitation	58.4 mm (2.3 in)	22 of 100 (Routine)
Weilmoringle	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Salekhard	Russia	Record daily precipitation	8.8 mm (0.35 in)	17 of 100 (Routine)
Gunnedah Pool	Australia	Record high minimum temperature	17.8 C (64.0 F)	16 of 100 (Routine)
Blackville (Welton Dale)	Australia	Record daily precipitation	9.9 mm (0.39 in)	16 of 100 (Routine)
Halmstad	Sweden	Record daily precipitation	18.6 mm (0.7 in)	15 of 100 (Routine)
Winnemucca AP	United States	Record high minimum temperature	15.0 C (59.0 F)	15 of 100 (Routine)
Barrow Creek	Australia	Record daily precipitation	3.0 mm (0.12 in)	12 of 100 (Routine)
Ulan-Ude	Russia	Record daily precipitation	0.6 mm (0.02 in)	12 of 100 (Routine)
Boulia Airport	Australia	Record daily precipitation	2.8 mm (0.11 in)	10 of 100 (Routine)
Kristianstad	Sweden	Record daily precipitation	12.5 mm (0.5 in)	9 of 100 (Routine)
Vinga	Sweden	Record daily precipitation	13.0 mm (0.5 in)	9 of 100 (Routine)
Warialda Post Office	Australia	Record daily precipitation	15.2 mm (0.6 in)	8 of 100 (Routine)
Cornwall	United States	Record daily precipitation	20.3 mm (0.8 in)	8 of 100 (Routine)
Yudnapinna	Australia	Record daily precipitation	4.1 mm (0.16 in)	7 of 100 (Routine)
Alice Springs Post Office	Australia	Record high maximum temperature	37.2 C (99.0 F)	6 of 100 (Routine)
Edgeroi	Australia	Record daily precipitation	4.8 mm (0.19 in)	6 of 100 (Routine)
Fort National	Algeria	Record high minimum temperature	18.0 C (64.4 F)	2 of 100 (Routine)

Counts by Type and Timescale

19 records

Records set or tied on 30 September 1917 by type: Highest daily maximum 1, Highest daily minimum 4, Heaviest daily rainfall 14.

Records on 30 September 1917 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	0
Highest daily minimum	4
Lowest daily minimum	0
Heaviest daily rainfall	14
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 30 September 1917 by timescale: all-time 0, monthly 1, daily 18.

How Much Records Were Beaten By

17 broken records

Margins by which the 17 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 19.3. Ties are not counted.

Top 20 by Significance

30 September 1917

Top 19 records on 30 September 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 September 1917	Bathurst Gaol, AU	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	55 years	26 of 100 (Routine)
30 September 1917	Camden 3 W, US	daily rain	58.4 mm (2.3 in)	19.3 mm (0.8 in)	20 years	22 of 100 (Routine)
30 September 1917	Weilmoringle, AU	daily rain	10.2 mm (0.4 in)	10.2 mm (0.4 in)	29 years	20 of 100 (Routine)
30 September 1917	Salekhard, RU	daily rain	8.8 mm (0.35 in)	2.4 mm (0.09 in)	26 years	17 of 100 (Routine)
30 September 1917	Gunnedah Pool, AU	daily high min	17.8 C (64.0 F)	2.2 C (4.0 F)	23 years	16 of 100 (Routine)
30 September 1917	Blackville (Welton Dale), AU	daily rain	9.9 mm (0.39 in)	6.3 mm (0.25 in)	28 years	16 of 100 (Routine)
30 September 1917	Halmstad, SE	daily rain	18.6 mm (0.7 in)	1.7 mm (0.07 in)	28 years	15 of 100 (Routine)
30 September 1917	Winnemucca AP, US	daily high min	15.0 C (59.0 F)	3.3 C (5.9 F)	12 years	15 of 100 (Routine)
30 September 1917	Barrow Creek, AU	daily rain	3.0 mm (0.12 in)	0.5 mm (0.02 in)	27 years	12 of 100 (Routine)
30 September 1917	Ulan-Ude, RU	daily rain	0.6 mm (0.02 in)	0.6 mm (0.02 in)	30 years	12 of 100 (Routine)
30 September 1917	Boulia Airport, AU	daily rain	2.8 mm (0.11 in)	1.5 mm (0.06 in)	18 years	10 of 100 (Routine)
30 September 1917	Kristianstad, SE	daily rain	12.5 mm (0.5 in)	2.1 mm (0.08 in)	6 years	9 of 100 (Routine)
30 September 1917	Vinga, SE	daily rain	13.0 mm (0.5 in)	1.0 mm (0.04 in)	17 years	9 of 100 (Routine)
30 September 1917	Warialda Post Office, AU	daily rain	15.2 mm (0.6 in)	0.7 mm (0.03 in)	16 years	8 of 100 (Routine)
30 September 1917	Cornwall, US	daily rain	20.3 mm (0.8 in)	0.5 mm (0.02 in)	17 years	8 of 100 (Routine)
30 September 1917	Yudnapinna, AU	daily rain	4.1 mm (0.16 in)	3.1 mm (0.12 in)	2 years	7 of 100 (Routine)
30 September 1917	Alice Springs Post Office, AU	monthly high max (Tie)	37.2 C (99.0 F)	tie	39 years	6 of 100 (Routine)
30 September 1917	Edgeroi, AU	daily rain	4.8 mm (0.19 in)	0.2 mm (0.01 in)	11 years	6 of 100 (Routine)
30 September 1917	Fort National, DZ	daily high min (Tie)	18.0 C (64.4 F)	tie	21 years	2 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

1806 to 1917

Records set or tied on this calendar date in each year from 1806 to 1917. 1917 had 19 records.

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

Records on 09-30 in each year
Year	Records
1806	1
1813	1
1817	1
1819	2
1834	1
1841	1
1842	1
1847	1
1853	1
1854	1
1855	1
1861	1
1862	1
1866	1
1868	2
1869	3
1870	1
1874	1
1877	1
1878	1
1881	5
1883	2
1885	1
1886	3
1887	1
1888	4
1889	1
1892	2
1893	3
1894	8
1895	5
1896	2
1897	3
1898	3
1899	12
1900	4
1901	11
1902	7
1903	9
1904	14
1905	25
1906	14
1907	16
1908	18
1909	10
1910	5
1911	47
1912	47
1913	10
1914	33
1915	84
1916	209
1917	19
1918	45
1919	28
1920	71
1921	61
1922	71
1923	183
1924	243
1925	211
1926	194
1927	486
1928	560
1929	181
1930	110
1931	225
1932	363
1933	437
1934	398
1935	209
1936	432
1937	417
1938	428
1939	371
1940	316
1941	482
1942	405
1943	404
1944	369
1945	889
1946	320
1947	433
1948	267
1949	366
1950	731
1951	597
1952	504
1953	1,136
1954	1,059
1955	406
1956	350
1957	663
1958	442
1959	1,159
1960	161
1961	618
1962	202
1963	818
1964	332
1965	459
1966	592
1967	859
1968	449
1969	465
1970	334
1971	1,359
1972	676
1973	407
1974	742
1975	686
1976	775
1977	870
1978	399
1979	479
1980	832
1981	688
1982	806
1983	1,102
1984	1,267
1985	1,892
1986	1,805
1987	649
1988	453
1989	713
1990	665
1991	949
1992	980
1993	988
1994	816
1995	1,061
1996	1,396
1997	729
1998	1,206
1999	1,144
2000	887
2001	699
2002	677
2003	1,079
2004	573
2005	761
2006	617
2007	841
2008	585
2009	826
2010	1,059
2011	1,258
2012	637
2013	634
2014	529
2015	997
2016	746
2017	404
2018	717
2019	2,192
2020	554
2021	823
2022	563
2023	1,012
2024	948
2025	559
2026	523

Download the Data

Data for records on 1917-09-30: 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 3	12
3 to 5	2
5 to 8	1
8 to 10	0
10 to 13	1
13 to 15	0
15 to 18	0
18 to 20	1