Weather Records on 1 August 1917

108 weather records were set or tied worldwide on 1 August 1917. Highest significance: Montreal McGill, CA.

Key Facts for 1 August 1917

On 1 August 1917, 108 weather records were set or tied at long-record stations worldwide.
85 were record highs and 4 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 24 monthly and 81 daily.
Montreal McGill set an all-time record high maximum temperature of 35.6 C (96.1 F) on 1 August 1917.
Across 164 earlier years (1797 to 2026) the same calendar date averaged 443 records.

Record Map

108 stations

108 station records on 1 August 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 August 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Montreal McGill	Canada	Record high maximum temperature	35.6 C (96.1 F)	38 of 100 (Notable)
Toronto	Canada	Record high maximum temperature	33.3 C (91.9 F)	28 of 100 (Routine)
Kerkwerve	Netherlands	Record daily precipitation	47.5 mm (1.9 in)	28 of 100 (Routine)
Burlington	United States	Record high maximum temperature	36.7 C (98.1 F)	28 of 100 (Routine)
Stratford	Canada	Record high minimum temperature	22.8 C (73.0 F)	27 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	36.7 C (98.1 F)	27 of 100 (Routine)
Concord	United States	Record high maximum temperature	37.2 C (99.0 F)	26 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high minimum temperature	26.7 C (80.1 F)	26 of 100 (Routine)
Orillia	Canada	Record daily precipitation	66.5 mm (2.6 in)	25 of 100 (Routine)
Parry Sound	Canada	Record high minimum temperature	22.2 C (72.0 F)	25 of 100 (Routine)
Beatrice	Canada	Record high minimum temperature	22.8 C (73.0 F)	24 of 100 (Routine)
Toronto	Canada	Record high minimum temperature	21.7 C (71.1 F)	24 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	33.9 C (93.0 F)	24 of 100 (Routine)
Washington	United States	Record high minimum temperature	26.1 C (79.0 F)	24 of 100 (Routine)
Bramfield Post Office	Australia	Record daily precipitation	27.4 mm (1.1 in)	23 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	23.9 C (75.0 F)	23 of 100 (Routine)
World Trade Ctr	United States	Record high minimum temperature	26.7 C (80.1 F)	23 of 100 (Routine)
Barrie	Canada	Record high minimum temperature	20.0 C (68.0 F)	22 of 100 (Routine)
Hvar	Croatia	Record high minimum temperature	27.0 C (80.6 F)	22 of 100 (Routine)
Northfield	United States	Record high maximum temperature	35.0 C (95.0 F)	22 of 100 (Routine)
Ottawa	Canada	Record high minimum temperature	21.1 C (70.0 F)	21 of 100 (Routine)
Barrie	Canada	Record high maximum temperature	33.3 C (91.9 F)	21 of 100 (Routine)
Oxford	United Kingdom	Record daily precipitation	23.7 mm (0.9 in)	20 of 100 (Routine)
Port Clinton (Yararoo)	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Hoorn	Netherlands	Record daily precipitation	15.8 mm (0.6 in)	20 of 100 (Routine)
Calgary Int'l A	Canada	Record low minimum temperature	2.2 C (36.0 F)	20 of 100 (Routine)
Stonecliffe	Canada	Record high minimum temperature	23.3 C (73.9 F)	20 of 100 (Routine)
Quebec	Canada	Record high maximum temperature	32.8 C (91.0 F)	20 of 100 (Routine)
Koebenhavn: Landbohojskolen-1	Denmark	Record high minimum temperature	18.7 C (65.7 F)	20 of 100 (Routine)
Scheveningen	Netherlands	Record daily precipitation	27.0 mm (1.1 in)	20 of 100 (Routine)
Cape May 2 NW	United States	Record high maximum temperature	32.8 C (91.0 F)	20 of 100 (Routine)
Toledo Blade	United States	Record high minimum temperature	23.9 C (75.0 F)	20 of 100 (Routine)
Morgantown 1	United States	Record high minimum temperature	22.8 C (73.0 F)	20 of 100 (Routine)
Lexington Bluegrass AP	United States	Record high minimum temperature	24.4 C (75.9 F)	20 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record daily precipitation	17.5 mm (0.7 in)	19 of 100 (Routine)
Yarmouth	Canada	Record high maximum temperature	26.7 C (80.1 F)	19 of 100 (Routine)
Middletown 4 W	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Blue Hill Coop	United States	Record high maximum temperature	36.1 C (97.0 F)	19 of 100 (Routine)
Atlantic City Marina	United States	Record high minimum temperature	25.6 C (78.1 F)	19 of 100 (Routine)
Sandvig	Denmark	Record high maximum temperature	25.5 C (77.9 F)	18 of 100 (Routine)
Ny City Cntrl Park	United States	Record high minimum temperature	27.8 C (82.0 F)	18 of 100 (Routine)
Groningen-1	Netherlands	Record daily precipitation	18.5 mm (0.7 in)	17 of 100 (Routine)
Vastervik	Sweden	Record high minimum temperature	17.5 C (63.5 F)	17 of 100 (Routine)
Sveg	Sweden	Record high minimum temperature	13.5 C (56.3 F)	17 of 100 (Routine)
Toledo Blade	United States	Record high maximum temperature	35.6 C (96.1 F)	17 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record low maximum temperature	17.2 C (63.0 F)	16 of 100 (Routine)
Stonecliffe	Canada	Record high maximum temperature	33.3 C (91.9 F)	16 of 100 (Routine)
London South	Canada	Record high minimum temperature	22.2 C (72.0 F)	16 of 100 (Routine)
Atlantic City Marina	United States	Record high maximum temperature	33.3 C (91.9 F)	16 of 100 (Routine)
Hamilton	Canada	Record high minimum temperature	24.4 C (75.9 F)	15 of 100 (Routine)
Chicoutimi	Canada	Record high minimum temperature	21.1 C (70.0 F)	15 of 100 (Routine)
Harnosand	Sweden	Record high minimum temperature	15.0 C (59.0 F)	15 of 100 (Routine)
Durham	United Kingdom	Record daily precipitation	12.7 mm (0.5 in)	15 of 100 (Routine)
State College	United States	Record high maximum temperature	33.9 C (93.0 F)	15 of 100 (Routine)
Swift Current	Canada	Record low minimum temperature	3.3 C (37.9 F)	14 of 100 (Routine)
Ottawa	Canada	Record high maximum temperature	36.1 C (97.0 F)	14 of 100 (Routine)
Lindsay	Canada	Record high minimum temperature	21.7 C (71.1 F)	14 of 100 (Routine)
Vineland	United States	Record high minimum temperature	23.9 C (75.0 F)	14 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high maximum temperature	35.0 C (95.0 F)	14 of 100 (Routine)
Port Stanley	Canada	Record high minimum temperature	21.7 C (71.1 F)	13 of 100 (Routine)

Counts by Type and Timescale

108 records

Records set or tied on 1 August 1917 by type: Highest daily maximum 35, Lowest daily maximum 2, Highest daily minimum 50, Lowest daily minimum 2, Heaviest daily rainfall 19.

Records on 1 August 1917 by type
Record type	Records
Highest daily maximum	35
Lowest daily maximum	2
Highest daily minimum	50
Lowest daily minimum	2
Heaviest daily rainfall	19
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 August 1917 by timescale: all-time 3, monthly 24, daily 81.

How Much Records Were Beaten By

84 broken records

Margins by which the 84 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 14.5. Ties are not counted.

Top 20 by Significance

1 August 1917

Top 20 records on 1 August 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 August 1917	Montreal McGill, CA	all-time high max	35.6 C (96.1 F)	0.6 C (1.1 F)	46 years	38 of 100 (Notable)
1 August 1917	Toronto, CA	daily high max	33.3 C (91.9 F)	1.1 C (2.0 F)	62 years	28 of 100 (Routine)
1 August 1917	Kerkwerve, NL	monthly rain	47.5 mm (1.9 in)	8.0 mm (0.31 in)	4 years	28 of 100 (Routine)
1 August 1917	Burlington, US	monthly high max	36.7 C (98.1 F)	2.3 C (4.1 F)	32 years	28 of 100 (Routine)
1 August 1917	Stratford, CA	daily high min	22.8 C (73.0 F)	3.9 C (7.0 F)	43 years	27 of 100 (Routine)
1 August 1917	World Trade Ctr, US	monthly high max	36.7 C (98.1 F)	1.1 C (2.0 F)	35 years	27 of 100 (Routine)
1 August 1917	Concord, US	monthly high max	37.2 C (99.0 F)	0.5 C (0.9 F)	34 years	26 of 100 (Routine)
1 August 1917	Newark Liberty Intl AP, US	monthly high min	26.7 C (80.1 F)	1.1 C (2.0 F)	20 years	26 of 100 (Routine)
1 August 1917	Orillia, CA	monthly rain	66.5 mm (2.6 in)	7.8 mm (0.31 in)	10 years	25 of 100 (Routine)
1 August 1917	Parry Sound, CA	monthly high min	22.2 C (72.0 F)	0.5 C (0.9 F)	35 years	25 of 100 (Routine)
1 August 1917	Beatrice, CA	monthly high min	22.8 C (73.0 F)	2.2 C (4.0 F)	16 years	24 of 100 (Routine)
1 August 1917	Toronto, CA	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	48 years	24 of 100 (Routine)
1 August 1917	Setauket Strong, US	daily high max	33.9 C (93.0 F)	3.9 C (7.0 F)	31 years	24 of 100 (Routine)
1 August 1917	Washington, US	daily high min	26.1 C (79.0 F)	1.7 C (3.1 F)	43 years	24 of 100 (Routine)
1 August 1917	Bramfield Post Office, AU	daily rain	27.4 mm (1.1 in)	11.4 mm (0.4 in)	4 years	23 of 100 (Routine)
1 August 1917	Woodstock, CA	monthly high min	23.9 C (75.0 F)	1.7 C (3.1 F)	16 years	23 of 100 (Routine)
1 August 1917	World Trade Ctr, US	monthly high min	26.7 C (80.1 F)	1.1 C (2.0 F)	16 years	23 of 100 (Routine)
1 August 1917	Barrie, CA	daily high min	20.0 C (68.0 F)	1.1 C (2.0 F)	48 years	22 of 100 (Routine)
1 August 1917	Hvar, HR	daily high min	27.0 C (80.6 F)	1.6 C (2.9 F)	36 years	22 of 100 (Routine)
1 August 1917	Northfield, US	monthly high max	35.0 C (95.0 F)	1.7 C (3.1 F)	17 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

1797 to 1917

Records set or tied on this calendar date in each year from 1797 to 1917. 1917 had 108 records.

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

Records on 08-01 in each year
Year	Records
1797	1
1816	2
1829	1
1833	1
1834	2
1836	1
1838	1
1842	1
1851	1
1856	1
1858	3
1859	1
1861	1
1862	1
1863	1
1865	1
1868	1
1869	2
1873	1
1874	1
1875	3
1876	1
1878	1
1879	1
1881	3
1883	1
1886	2
1887	1
1890	1
1891	7
1892	4
1893	3
1894	1
1895	3
1896	4
1897	2
1898	3
1899	1
1900	1
1901	3
1902	5
1903	19
1904	10
1905	12
1906	18
1907	13
1908	18
1909	15
1910	30
1911	46
1912	49
1913	25
1914	17
1915	49
1916	16
1917	108
1918	55
1919	32
1920	101
1921	87
1922	44
1923	203
1924	93
1925	281
1926	252
1927	266
1928	132
1929	161
1930	252
1931	362
1932	408
1933	487
1934	448
1935	547
1936	636
1937	492
1938	523
1939	335
1940	333
1941	341
1942	388
1943	398
1944	410
1945	975
1946	336
1947	401
1948	354
1949	324
1950	552
1951	420
1952	391
1953	565
1954	462
1955	796
1956	441
1957	270
1958	389
1959	352
1960	677
1961	404
1962	602
1963	270
1964	883
1965	669
1966	383
1967	250
1968	625
1969	453
1970	482
1971	1,135
1972	609
1973	766
1974	526
1975	915
1976	886
1977	636
1978	706
1979	580
1980	906
1981	668
1982	742
1983	931
1984	532
1985	987
1986	846
1987	999
1988	880
1989	1,301
1990	927
1991	740
1992	1,024
1993	907
1994	1,217
1995	1,513
1996	1,118
1997	904
1998	1,281
1999	1,707
2000	1,020
2001	1,079
2002	1,249
2003	1,155
2004	740
2005	878
2006	1,655
2007	746
2008	795
2009	932
2010	1,182
2011	1,191
2012	850
2013	542
2014	853
2015	864
2016	499
2017	758
2018	987
2019	479
2020	838
2021	1,009
2022	915
2023	627
2024	879
2025	785
2026	1,085

Download the Data

Data for records on 1917-08-01: 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 2	47
2 to 4	27
4 to 6	3
6 to 8	3
8 to 10	2
10 to 12	1
12 to 14	0
14 to 16	1