Weather Records on 23 May 1917

58 weather records were set or tied worldwide on 23 May 1917. Highest significance: Alton, CA.

Key Facts for 23 May 1917

On 23 May 1917, 58 weather records were set or tied at long-record stations worldwide.
1 were record highs and 44 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 57 daily.
Alton set a daily record precipitation of 35.8 mm (1.4 in) on 23 May 1917.
Across 158 earlier years (1793 to 2026) the same calendar date averaged 465 records.

Record Map

58 stations

58 station records on 23 May 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 May 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alton	Canada	Record daily precipitation	35.8 mm (1.4 in)	34 of 100 (Routine)
White River	Canada	Record daily snowfall	8.6 cm (3.4 in)	32 of 100 (Routine)
Malmesbury	South Africa	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Peterborough	Canada	Record low maximum temperature	6.7 C (44.1 F)	25 of 100 (Routine)
Winnemucca AP	United States	Record daily precipitation	28.7 mm (1.1 in)	25 of 100 (Routine)
Escanaba	United States	Record low maximum temperature	5.6 C (42.1 F)	23 of 100 (Routine)
Hamilton	Canada	Record low maximum temperature	7.8 C (46.0 F)	22 of 100 (Routine)
Green Bay	United States	Record low minimum temperature	-1.1 C (30.0 F)	22 of 100 (Routine)
Stratford	Canada	Record low maximum temperature	4.4 C (39.9 F)	21 of 100 (Routine)
Camden 3 W	United States	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Halifax	Canada	Record low maximum temperature	7.2 C (45.0 F)	19 of 100 (Routine)
Morgantown 1	United States	Record low maximum temperature	16.1 C (61.0 F)	17 of 100 (Routine)
Southampton	Canada	Record low maximum temperature	6.7 C (44.1 F)	16 of 100 (Routine)
Montreal McGill	Canada	Record daily precipitation	21.8 mm (0.9 in)	16 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record low maximum temperature	9.4 C (48.9 F)	16 of 100 (Routine)
Toledo Blade	United States	Record low minimum temperature	2.2 C (36.0 F)	16 of 100 (Routine)
La Crosse Wb City	United States	Record low minimum temperature	0.6 C (33.1 F)	16 of 100 (Routine)
Madison Wb City	United States	Record low minimum temperature	0.6 C (33.1 F)	16 of 100 (Routine)
Macarthur (Glenhuntly)	Australia	Record daily precipitation	14.7 mm (0.6 in)	15 of 100 (Routine)
Port Dover	Canada	Record low maximum temperature	7.8 C (46.0 F)	15 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record low minimum temperature	0.0 C (32.0 F)	15 of 100 (Routine)
Concord	United States	Record low maximum temperature	7.8 C (46.0 F)	15 of 100 (Routine)
Kingston SE	Australia	Record daily precipitation	6.4 mm (0.25 in)	14 of 100 (Routine)
Winnipeg St Johns Coll	Canada	Record low minimum temperature	-2.2 C (28.0 F)	14 of 100 (Routine)
Guelph Oac	Canada	Record daily precipitation	19.1 mm (0.8 in)	14 of 100 (Routine)
Windsor Riverside	Canada	Record daily precipitation	16.3 mm (0.6 in)	13 of 100 (Routine)
Guelph Oac	Canada	Record low maximum temperature	11.7 C (53.1 F)	13 of 100 (Routine)
Lakefield	Canada	Record low maximum temperature	6.7 C (44.1 F)	13 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record low minimum temperature	2.8 C (37.0 F)	13 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low minimum temperature	3.9 C (39.0 F)	13 of 100 (Routine)
St Albans	Canada	Record low minimum temperature	-4.4 C (24.1 F)	12 of 100 (Routine)
Burlington	United States	Record low maximum temperature	9.4 C (48.9 F)	12 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low maximum temperature	14.4 C (57.9 F)	12 of 100 (Routine)
Simferopol	Ukraine	Record low minimum temperature	-2.0 C (28.4 F)	11 of 100 (Routine)
Green Bay	United States	Record low maximum temperature	10.0 C (50.0 F)	11 of 100 (Routine)
Halmstad	Sweden	Record low minimum temperature	0.0 C (32.0 F)	10 of 100 (Routine)
Kremsmuenster	Austria	Record low minimum temperature	4.2 C (39.6 F)	9 of 100 (Routine)
Skara 1	Sweden	Record low minimum temperature	-2.5 C (27.5 F)	9 of 100 (Routine)
Middletown 4 W	United States	Record low maximum temperature	10.6 C (51.1 F)	9 of 100 (Routine)
Toledo Blade	United States	Record low maximum temperature	10.0 C (50.0 F)	9 of 100 (Routine)
San Diego Wbo	United States	Record low maximum temperature	15.0 C (59.0 F)	8 of 100 (Routine)
Saint John	Canada	Record low maximum temperature	7.2 C (45.0 F)	7 of 100 (Routine)
Portland	United States	Record low maximum temperature	8.3 C (46.9 F)	7 of 100 (Routine)
Winnemucca AP	United States	Record low maximum temperature	7.2 C (45.0 F)	7 of 100 (Routine)
Heinersreuth-Vollhof	Germany	Record low minimum temperature	2.4 C (36.3 F)	6 of 100 (Routine)
Hughenden Post Office	Australia	Record daily precipitation	2.8 mm (0.11 in)	5 of 100 (Routine)
Wrixum/Fohr	Germany	Record high maximum temperature	24.2 C (75.6 F)	5 of 100 (Routine)
Lucknow	Canada	Record low maximum temperature	10.0 C (50.0 F)	4 of 100 (Routine)
Port Dover	Canada	Record low minimum temperature	2.2 C (36.0 F)	4 of 100 (Routine)
Windsor Riverside	Canada	Record low minimum temperature	1.1 C (34.0 F)	3 of 100 (Routine)
Milwaukee Wb City	United States	Record low minimum temperature	0.6 C (33.1 F)	3 of 100 (Routine)
London South	Canada	Record low maximum temperature	12.8 C (55.0 F)	2 of 100 (Routine)
Chattanooga Wb City	United States	Record low maximum temperature	17.8 C (64.0 F)	2 of 100 (Routine)
Nemours (Ghazaouet)	Algeria	Record low minimum temperature	11.0 C (51.8 F)	1 of 100 (Routine)
Minlaton	Australia	Record daily precipitation	3.8 mm (0.15 in)	1 of 100 (Routine)
Stony Mountain	Canada	Record low minimum temperature	-1.1 C (30.0 F)	1 of 100 (Routine)
Watford	Canada	Record daily precipitation	15.2 mm (0.6 in)	1 of 100 (Routine)
Madison Wb City	United States	Record low maximum temperature	12.2 C (54.0 F)	1 of 100 (Routine)

Counts by Type and Timescale

58 records

Records set or tied on 23 May 1917 by type: Highest daily maximum 1, Lowest daily maximum 25, Lowest daily minimum 19, Heaviest daily rainfall 12, Heaviest daily snowfall 1.

Records on 23 May 1917 by type
Record type	Records
Highest daily maximum	1
Lowest daily maximum	25
Highest daily minimum	0
Lowest daily minimum	19
Heaviest daily rainfall	12
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 23 May 1917 by timescale: all-time 0, monthly 1, daily 57.

How Much Records Were Beaten By

48 broken records

Margins by which the 48 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 86.0. Ties are not counted.

Top 20 by Significance

23 May 1917

Top 20 records on 23 May 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 May 1917	Alton, CA	daily rain	35.8 mm (1.4 in)	23.1 mm (0.9 in)	26 years	34 of 100 (Routine)
23 May 1917	White River, CA	daily snowfall	8.6 cm (3.4 in)	8.6 cm (3.4 in)	29 years	32 of 100 (Routine)
23 May 1917	Malmesbury, ZA	daily rain	27.9 mm (1.1 in)	11.4 mm (0.4 in)	26 years	26 of 100 (Routine)
23 May 1917	Peterborough, CA	daily low max	6.7 C (44.1 F)	3.3 C (5.9 F)	50 years	25 of 100 (Routine)
23 May 1917	Winnemucca AP, US	monthly rain	28.7 mm (1.1 in)	2.5 mm (0.10 in)	17 years	25 of 100 (Routine)
23 May 1917	Escanaba, US	daily low max	5.6 C (42.1 F)	4.4 C (7.9 F)	34 years	23 of 100 (Routine)
23 May 1917	Hamilton, CA	daily low max	7.8 C (46.0 F)	2.2 C (4.0 F)	49 years	22 of 100 (Routine)
23 May 1917	Green Bay, US	daily low min	-1.1 C (30.0 F)	5.5 C (9.9 F)	25 years	22 of 100 (Routine)
23 May 1917	Stratford, CA	daily low max	4.4 C (39.9 F)	1.7 C (3.1 F)	49 years	21 of 100 (Routine)
23 May 1917	Camden 3 W, US	daily rain	18.5 mm (0.7 in)	3.3 mm (0.13 in)	62 years	20 of 100 (Routine)
23 May 1917	Halifax, CA	daily low max	7.2 C (45.0 F)	1.1 C (2.0 F)	44 years	19 of 100 (Routine)
23 May 1917	Morgantown 1, US	daily low max	16.1 C (61.0 F)	0.6 C (1.1 F)	40 years	17 of 100 (Routine)
23 May 1917	Southampton, CA	daily low max	6.7 C (44.1 F)	1.6 C (2.9 F)	34 years	16 of 100 (Routine)
23 May 1917	Montreal McGill, CA	daily rain	21.8 mm (0.9 in)	2.0 mm (0.08 in)	34 years	16 of 100 (Routine)
23 May 1917	Cleveland 2717 Euclid, US	daily low max	9.4 C (48.9 F)	0.6 C (1.1 F)	40 years	16 of 100 (Routine)
23 May 1917	Toledo Blade, US	daily low min	2.2 C (36.0 F)	1.1 C (2.0 F)	33 years	16 of 100 (Routine)
23 May 1917	La Crosse Wb City, US	daily low min	0.6 C (33.1 F)	1.1 C (2.0 F)	34 years	16 of 100 (Routine)
23 May 1917	Madison Wb City, US	daily low min	0.6 C (33.1 F)	1.1 C (2.0 F)	34 years	16 of 100 (Routine)
23 May 1917	Macarthur (Glenhuntly), AU	daily rain	14.7 mm (0.6 in)	4.5 mm (0.18 in)	18 years	15 of 100 (Routine)
23 May 1917	Port Dover, CA	daily low max	7.8 C (46.0 F)	2.2 C (4.0 F)	24 years	15 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 1917

Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 58 records.

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

Records on 05-23 in each year
Year	Records
1793	1
1794	1
1798	1
1817	1
1818	1
1837	3
1845	1
1847	2
1857	1
1863	1
1865	2
1866	5
1867	7
1870	2
1871	1
1875	1
1877	1
1878	1
1880	1
1884	2
1885	2
1886	4
1887	1
1889	2
1891	11
1893	3
1894	1
1895	3
1896	4
1897	3
1898	8
1899	3
1900	12
1901	3
1902	12
1903	6
1904	14
1905	10
1906	23
1907	11
1908	13
1909	23
1910	26
1911	39
1912	31
1913	29
1914	33
1915	13
1916	44
1917	58
1918	36
1919	120
1920	37
1921	92
1922	82
1923	99
1924	230
1925	325
1926	204
1927	243
1928	177
1929	221
1930	199
1931	719
1932	358
1933	443
1934	203
1935	369
1936	568
1937	156
1938	390
1939	415
1940	324
1941	676
1942	235
1943	342
1944	784
1945	241
1946	311
1947	285
1948	273
1949	612
1950	490
1951	400
1952	597
1953	777
1954	496
1955	650
1956	498
1957	653
1958	744
1959	486
1960	395
1961	412
1962	677
1963	1,153
1964	964
1965	477
1966	391
1967	1,055
1968	578
1969	437
1970	314
1971	659
1972	449
1973	371
1974	678
1975	855
1976	556
1977	596
1978	703
1979	730
1980	1,202
1981	862
1982	717
1983	1,123
1984	1,027
1985	608
1986	626
1987	745
1988	662
1989	1,106
1990	1,660
1991	1,244
1992	1,423
1993	845
1994	690
1995	1,106
1996	1,114
1997	983
1998	947
1999	705
2000	1,372
2001	1,441
2002	1,537
2003	954
2004	1,275
2005	908
2006	1,122
2007	1,170
2008	1,472
2009	805
2010	1,275
2011	1,001
2012	1,006
2013	929
2014	858
2015	667
2016	679
2017	602
2018	552
2019	1,044
2020	631
2021	837
2022	807
2023	316
2024	760
2025	865
2026	804

Download the Data

Data for records on 1917-05-23: 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 20	46
20 to 40	1
40 to 60	0
60 to 80	0
80 to 100	1