Weather Records on 30 October 1917

85 weather records were set or tied worldwide on 30 October 1917. Highest significance: Brome, CA.

Key Facts for 30 October 1917

On 30 October 1917, 85 weather records were set or tied at long-record stations worldwide.
12 were record highs and 34 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 75 daily.
Brome set a daily record precipitation of 56.1 mm (2.2 in) on 30 October 1917.
Across 153 earlier years (1799 to 2025) the same calendar date averaged 493 records.

Record Map

85 stations

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

Weather records on 30 October 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Brome	Canada	Record daily precipitation	56.1 mm (2.2 in)	53 of 100 (Notable)
Northfield	United States	Record daily precipitation	49.5 mm (1.9 in)	44 of 100 (Notable)
Przhevalsk	Kyrgyzstan	Record daily precipitation	25.5 mm (1.0 in)	39 of 100 (Notable)
Cape May 2 NW	United States	Record daily precipitation	51.3 mm (2.0 in)	38 of 100 (Notable)
Dubuque River	United States	Record low maximum temperature	-3.9 C (25.0 F)	33 of 100 (Routine)
Burlington	United States	Record daily precipitation	39.4 mm (1.6 in)	30 of 100 (Routine)
Madison Wb City	United States	Record low maximum temperature	-5.0 C (23.0 F)	30 of 100 (Routine)
Moorestown 4 E	United States	Record daily precipitation	45.5 mm (1.8 in)	29 of 100 (Routine)
Port Jervis	United States	Record daily precipitation	40.4 mm (1.6 in)	28 of 100 (Routine)
Quebec	Canada	Record daily precipitation	46.5 mm (1.8 in)	27 of 100 (Routine)
Weldon	United States	Record daily precipitation	38.4 mm (1.5 in)	27 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record low minimum temperature	-20.3 C (-4.5 F)	26 of 100 (Routine)
Hanover	United States	Record daily precipitation	48.3 mm (1.9 in)	26 of 100 (Routine)
Vineland	United States	Record daily precipitation	50.3 mm (2.0 in)	26 of 100 (Routine)
Milwaukee Wb City	United States	Record low maximum temperature	-3.3 C (26.1 F)	25 of 100 (Routine)
Houston Wb City	United States	Record low minimum temperature	0.6 C (33.1 F)	24 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low maximum temperature	-1.1 C (30.0 F)	24 of 100 (Routine)
Hamilton	Canada	Record daily precipitation	35.1 mm (1.4 in)	23 of 100 (Routine)
Cornwall	United States	Record daily precipitation	60.2 mm (2.4 in)	22 of 100 (Routine)
Philadelphia City	United States	Record daily precipitation	26.2 mm (1.0 in)	22 of 100 (Routine)
Chatham	Canada	Record high maximum temperature	17.8 C (64.0 F)	21 of 100 (Routine)
Ny City Cntrl Park	United States	Record daily precipitation	41.7 mm (1.6 in)	21 of 100 (Routine)
Maccue	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Ottawa	Canada	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Montreal McGill	Canada	Record daily precipitation	26.9 mm (1.1 in)	20 of 100 (Routine)
Halifax	Canada	Record high maximum temperature	17.8 C (64.0 F)	20 of 100 (Routine)
Little Rock St Capitol	United States	Record low minimum temperature	-2.8 C (27.0 F)	19 of 100 (Routine)
Leominster	United States	Record daily precipitation	33.0 mm (1.3 in)	19 of 100 (Routine)
Setauket Strong	United States	Record daily precipitation	36.1 mm (1.4 in)	19 of 100 (Routine)
Saint John	Canada	Record high maximum temperature	14.4 C (57.9 F)	17 of 100 (Routine)
Santa Fe	United States	Record low minimum temperature	-4.4 C (24.1 F)	17 of 100 (Routine)
Houston Wb City	United States	Record low maximum temperature	13.3 C (55.9 F)	17 of 100 (Routine)
Nemours (Ghazaouet)	Algeria	Record low maximum temperature	18.0 C (64.4 F)	16 of 100 (Routine)
Minnedosa	Canada	Record low minimum temperature	-15.6 C (3.9 F)	16 of 100 (Routine)
St Albans	Canada	Record low minimum temperature	-16.1 C (3.0 F)	16 of 100 (Routine)
Arnsberg	Germany	Record snow depth	2.0 cm (0.8 in)	16 of 100 (Routine)
Reading Wb City	United States	Record daily precipitation	28.2 mm (1.1 in)	16 of 100 (Routine)
Quebec	Canada	Record high maximum temperature	12.8 C (55.0 F)	15 of 100 (Routine)
Blue Hill Coop	United States	Record daily precipitation	47.0 mm (1.9 in)	15 of 100 (Routine)
Dubuque River	United States	Record snow depth	2.5 cm (1.0 in)	15 of 100 (Routine)
Stoney Creek	Canada	Record daily precipitation	22.4 mm (0.9 in)	14 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record low maximum temperature	-5.6 C (21.9 F)	14 of 100 (Routine)
Charters Towers Post Office	Australia	Record daily precipitation	2.5 mm (0.10 in)	13 of 100 (Routine)
Tahlee (Carrington (Church St)	Australia	Record daily precipitation	20.3 mm (0.8 in)	13 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record low minimum temperature	-3.3 C (26.1 F)	13 of 100 (Routine)
Montgomery Wb City	United States	Record low maximum temperature	11.1 C (52.0 F)	12 of 100 (Routine)
Madison Wb City	United States	Record low minimum temperature	-8.9 C (16.0 F)	12 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	6.7 C (44.1 F)	12 of 100 (Routine)
Ferrara	Italy	Record daily precipitation	23.1 mm (0.9 in)	11 of 100 (Routine)
Concordia ASOS	United States	Record low minimum temperature	-8.9 C (16.0 F)	11 of 100 (Routine)
Nebo	Australia	Record daily precipitation	8.1 mm (0.32 in)	10 of 100 (Routine)
St Albans	Canada	Record low maximum temperature	-1.7 C (28.9 F)	10 of 100 (Routine)
Fredericton Unb	Canada	Record high maximum temperature	17.8 C (64.0 F)	10 of 100 (Routine)
Nurnberg	Germany	Record low maximum temperature	2.8 C (37.0 F)	10 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record high minimum temperature	1.1 C (34.0 F)	10 of 100 (Routine)
Nikolaevsk-Na-Amure	Russia	Record daily precipitation	18.9 mm (0.7 in)	10 of 100 (Routine)
State College	United States	Record daily precipitation	7.1 mm (0.28 in)	10 of 100 (Routine)
Green Bay	United States	Record low maximum temperature	-2.2 C (28.0 F)	10 of 100 (Routine)
White River	Canada	Record daily snowfall	1.8 cm (0.7 in)	9 of 100 (Routine)
Paris	Canada	Record daily precipitation	16.5 mm (0.6 in)	9 of 100 (Routine)

Counts by Type and Timescale

85 records

Records set or tied on 30 October 1917 by type: Highest daily maximum 8, Lowest daily maximum 18, Highest daily minimum 4, Lowest daily minimum 16, Heaviest daily rainfall 32, Heaviest daily snowfall 5, Deepest snow cover 2.

Records on 30 October 1917 by type
Record type	Records
Highest daily maximum	8
Lowest daily maximum	18
Highest daily minimum	4
Lowest daily minimum	16
Heaviest daily rainfall	32
Heaviest daily snowfall	5
Deepest snow cover	2

Records on 30 October 1917 by timescale: all-time 0, monthly 10, daily 75.

How Much Records Were Beaten By

73 broken records

Margins by which the 73 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 45.2. Ties are not counted.

Top 20 by Significance

30 October 1917

Top 20 records on 30 October 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 October 1917	Brome, CA	daily rain	56.1 mm (2.2 in)	30.7 mm (1.2 in)	36 years	53 of 100 (Notable)
30 October 1917	Northfield, US	daily rain	49.5 mm (1.9 in)	45.2 mm (1.8 in)	4 years	44 of 100 (Notable)
30 October 1917	Przhevalsk, KG	daily rain	25.5 mm (1.0 in)	15.8 mm (0.6 in)	29 years	39 of 100 (Notable)
30 October 1917	Cape May 2 NW, US	daily rain	51.3 mm (2.0 in)	31.2 mm (1.2 in)	36 years	38 of 100 (Notable)
30 October 1917	Dubuque River, US	monthly low max	-3.9 C (25.0 F)	5.0 C (9.0 F)	38 years	33 of 100 (Routine)
30 October 1917	Burlington, US	daily rain	39.4 mm (1.6 in)	14.0 mm (0.6 in)	31 years	30 of 100 (Routine)
30 October 1917	Madison Wb City, US	monthly low max	-5.0 C (23.0 F)	1.7 C (3.1 F)	48 years	30 of 100 (Routine)
30 October 1917	Moorestown 4 E, US	daily rain	45.5 mm (1.8 in)	22.6 mm (0.9 in)	35 years	29 of 100 (Routine)
30 October 1917	Port Jervis, US	daily rain	40.4 mm (1.6 in)	34.8 mm (1.4 in)	18 years	28 of 100 (Routine)
30 October 1917	Quebec, CA	daily rain	46.5 mm (1.8 in)	10.4 mm (0.4 in)	38 years	27 of 100 (Routine)
30 October 1917	Weldon, US	daily rain	38.4 mm (1.5 in)	25.7 mm (1.0 in)	36 years	27 of 100 (Routine)
30 October 1917	Ilulissat (Jakobshavn), GL	monthly low min	-20.3 C (-4.5 F)	0.1 C (0.2 F)	43 years	26 of 100 (Routine)
30 October 1917	Hanover, US	daily rain	48.3 mm (1.9 in)	13.0 mm (0.5 in)	31 years	26 of 100 (Routine)
30 October 1917	Vineland, US	daily rain	50.3 mm (2.0 in)	29.7 mm (1.2 in)	8 years	26 of 100 (Routine)
30 October 1917	Milwaukee Wb City, US	monthly low max	-3.3 C (26.1 F)	1.6 C (2.9 F)	30 years	25 of 100 (Routine)
30 October 1917	Houston Wb City, US	monthly low min	0.6 C (33.1 F)	1.6 C (2.9 F)	28 years	24 of 100 (Routine)
30 October 1917	Lexington Bluegrass AP, US	monthly low max	-1.1 C (30.0 F)	4.4 C (7.9 F)	11 years	24 of 100 (Routine)
30 October 1917	Hamilton, CA	daily rain	35.1 mm (1.4 in)	13.0 mm (0.5 in)	16 years	23 of 100 (Routine)
30 October 1917	Cornwall, US	monthly rain	60.2 mm (2.4 in)	8.1 mm (0.32 in)	6 years	22 of 100 (Routine)
30 October 1917	Philadelphia City, US	daily rain	26.2 mm (1.0 in)	9.9 mm (0.39 in)	35 years	22 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

1799 to 1917

Records set or tied on this calendar date in each year from 1799 to 1917. 1917 had 85 records.

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

Records on 10-30 in each year
Year	Records
1799	1
1815	1
1837	1
1839	1
1841	1
1849	1
1856	1
1866	1
1867	1
1869	5
1870	1
1871	1
1873	2
1877	1
1881	4
1885	3
1886	2
1887	1
1888	1
1889	3
1890	4
1891	2
1892	3
1894	7
1896	4
1897	2
1898	2
1899	2
1900	3
1901	9
1902	6
1903	3
1904	1
1905	12
1906	25
1907	12
1908	14
1909	15
1910	22
1911	19
1912	28
1913	38
1914	22
1915	39
1916	23
1917	85
1918	189
1919	80
1920	73
1921	31
1922	108
1923	202
1924	246
1925	755
1926	131
1927	259
1928	195
1929	277
1930	228
1931	144
1932	181
1933	454
1934	198
1935	739
1936	253
1937	496
1938	245
1939	240
1940	251
1941	393
1942	877
1943	255
1944	497
1945	446
1946	826
1947	252
1948	326
1949	528
1950	1,186
1951	373
1952	635
1953	522
1954	276
1955	494
1956	716
1957	531
1958	366
1959	859
1960	258
1961	781
1962	382
1963	353
1964	488
1965	439
1966	490
1967	665
1968	555
1969	656
1970	636
1971	1,663
1972	902
1973	534
1974	1,039
1975	427
1976	760
1977	882
1978	359
1979	809
1980	885
1981	547
1982	534
1983	549
1984	1,270
1985	848
1986	422
1987	883
1988	972
1989	904
1990	685
1991	2,772
1992	1,228
1993	2,095
1994	777
1995	831
1996	1,299
1997	1,033
1998	771
1999	897
2000	1,659
2001	1,233
2002	1,564
2003	973
2004	1,188
2005	1,144
2006	886
2007	773
2008	1,310
2009	1,513
2010	619
2011	1,022
2012	1,413
2013	622
2014	297
2015	395
2016	981
2017	783
2018	507
2019	1,931
2020	683
2021	486
2022	762
2023	969
2024	1,393
2025	322

Download the Data

Data for records on 1917-10-30: 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).

Histogram of margins by which records were beaten on 30 October 1917
Margin	Records
0 to 10	55
10 to 20	8
20 to 30	6
30 to 40	3
40 to 50	1