Weather Records on 12 May 1917

54 weather records were set or tied worldwide on 12 May 1917. Highest significance: Cap Madeleine, CA.

Key Facts for 12 May 1917

On 12 May 1917, 54 weather records were set or tied at long-record stations worldwide.
9 were record highs and 15 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 53 daily.
Cap Madeleine set a daily record precipitation of 30.5 mm (1.2 in) on 12 May 1917.
Across 164 earlier years (1814 to 2026) the same calendar date averaged 455 records.

Record Map

54 stations

54 station records on 12 May 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 12 May 1917: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cap Madeleine	Canada	Record daily precipitation	30.5 mm (1.2 in)	52 of 100 (Notable)
Kingston SE	Australia	Record daily precipitation	26.4 mm (1.0 in)	38 of 100 (Notable)
Houston Wb City	United States	Record low maximum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Meadows	Australia	Record daily precipitation	37.3 mm (1.5 in)	21 of 100 (Routine)
Chatham	Canada	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Edmonton	Canada	Record high minimum temperature	12.2 C (54.0 F)	19 of 100 (Routine)
Blue Hill Coop	United States	Record low maximum temperature	6.7 C (44.1 F)	18 of 100 (Routine)
Yacka	Australia	Record daily precipitation	17.5 mm (0.7 in)	17 of 100 (Routine)
Englesberg Village	Australia	Record daily precipitation	7.9 mm (0.31 in)	17 of 100 (Routine)
Cape Northumberland	Australia	Record daily precipitation	14.5 mm (0.6 in)	16 of 100 (Routine)
Lucindale Post Office	Australia	Record daily precipitation	17.3 mm (0.7 in)	16 of 100 (Routine)
Trangie (Old Bundemar)	Australia	Record daily precipitation	3.8 mm (0.15 in)	16 of 100 (Routine)
Sandy Creek Tank	Australia	Record daily precipitation	5.8 mm (0.23 in)	15 of 100 (Routine)
Gilgoin	Australia	Record daily precipitation	2.3 mm (0.09 in)	15 of 100 (Routine)
Edmonton	Canada	Record high maximum temperature	25.6 C (78.1 F)	15 of 100 (Routine)
Blinman (Wirrealpa)	Australia	Record daily precipitation	1.8 mm (0.07 in)	14 of 100 (Routine)
Adelaide West Terrace	Australia	Record low maximum temperature	12.4 C (54.3 F)	14 of 100 (Routine)
Tarlee	Australia	Record daily precipitation	11.4 mm (0.4 in)	14 of 100 (Routine)
Cape Otway Lighthouse	Australia	Record low maximum temperature	11.2 C (52.2 F)	14 of 100 (Routine)
Middleton (Sar)	South Africa	Record daily precipitation	2.5 mm (0.10 in)	14 of 100 (Routine)
Edithburgh Post Office	Australia	Record daily precipitation	7.9 mm (0.31 in)	13 of 100 (Routine)
Coronga Downs	Australia	Record daily precipitation	6.1 mm (0.24 in)	13 of 100 (Routine)
Alexandria (Pol)	South Africa	Record daily precipitation	19.1 mm (0.8 in)	13 of 100 (Routine)
Setauket Strong	United States	Record low maximum temperature	11.7 C (53.1 F)	13 of 100 (Routine)
Ashbourne	Australia	Record daily precipitation	17.8 mm (0.7 in)	12 of 100 (Routine)
Robe Comparison	Australia	Record low maximum temperature	12.5 C (54.5 F)	12 of 100 (Routine)
Nymagee (Kenmure Station)	Australia	Record daily precipitation	4.6 mm (0.18 in)	12 of 100 (Routine)
Pallal	Australia	Record daily precipitation	1.0 mm (0.04 in)	12 of 100 (Routine)
Ebor (Wongwibinda)	Australia	Record daily precipitation	4.3 mm (0.17 in)	12 of 100 (Routine)
Medicine Hat A	Canada	Record high maximum temperature	29.4 C (84.9 F)	11 of 100 (Routine)
Lexington Bluegrass AP	United States	Record low minimum temperature	2.2 C (36.0 F)	11 of 100 (Routine)
Algiers-Ville/Universite	Algeria	Record high maximum temperature	35.0 C (95.0 F)	10 of 100 (Routine)
Kingscote	Australia	Record daily precipitation	13.0 mm (0.5 in)	10 of 100 (Routine)
Brewarrina Hospital	Australia	Record daily precipitation	3.6 mm (0.14 in)	10 of 100 (Routine)
Cet Central England	United Kingdom	Record high maximum temperature	22.5 C (72.5 F)	10 of 100 (Routine)
Cobar (Meryula)	Australia	Record daily precipitation	4.8 mm (0.19 in)	9 of 100 (Routine)
Medicine Hat A	Canada	Record high minimum temperature	13.3 C (55.9 F)	9 of 100 (Routine)
Harnosand	Sweden	Record low minimum temperature	-3.5 C (25.7 F)	9 of 100 (Routine)
Calgary Int'l A	Canada	Record high maximum temperature	26.7 C (80.1 F)	8 of 100 (Routine)
Hewitt	United States	Record daily precipitation	19.6 mm (0.8 in)	8 of 100 (Routine)
Stonehenge	Australia	Record daily precipitation	4.8 mm (0.19 in)	7 of 100 (Routine)
Cobar (Springfield 2)	Australia	Record daily precipitation	4.8 mm (0.19 in)	6 of 100 (Routine)
Jamieson	Australia	Record daily precipitation	16.5 mm (0.6 in)	6 of 100 (Routine)
Fort National	Algeria	Record high minimum temperature	22.0 C (71.6 F)	4 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record low maximum temperature	12.8 C (55.0 F)	4 of 100 (Routine)
Fredericton Unb	Canada	Record low maximum temperature	7.2 C (45.0 F)	3 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low minimum temperature	-1.5 C (29.3 F)	3 of 100 (Routine)
Panban	Australia	Record daily precipitation	2.5 mm (0.10 in)	2 of 100 (Routine)
Dandaloo (Tyrie Homestead)	Australia	Record daily precipitation	5.1 mm (0.20 in)	2 of 100 (Routine)
Haparanda	Sweden	Record low minimum temperature	-4.5 C (23.9 F)	2 of 100 (Routine)
Vastervik	Sweden	Record low minimum temperature	-2.0 C (28.4 F)	2 of 100 (Routine)
Gavle	Sweden	Record low minimum temperature	-3.0 C (26.6 F)	2 of 100 (Routine)
Fort National	Algeria	Record high maximum temperature	30.0 C (86.0 F)	1 of 100 (Routine)
Northfield	United States	Record low maximum temperature	9.4 C (48.9 F)	0 of 100 (Routine)

Counts by Type and Timescale

54 records

Records set or tied on 12 May 1917 by type: Highest daily maximum 6, Lowest daily maximum 9, Highest daily minimum 3, Lowest daily minimum 6, Heaviest daily rainfall 30.

Records on 12 May 1917 by type
Record type	Records
Highest daily maximum	6
Lowest daily maximum	9
Highest daily minimum	3
Lowest daily minimum	6
Heaviest daily rainfall	30
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 12 May 1917 by timescale: all-time 0, monthly 1, daily 53.

How Much Records Were Beaten By

44 broken records

Margins by which the 44 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 25.4. Ties are not counted.

Top 20 by Significance

12 May 1917

Top 20 records on 12 May 1917 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 May 1917	Cap Madeleine, CA	daily rain	30.5 mm (1.2 in)	25.4 mm (1.0 in)	33 years	52 of 100 (Notable)
12 May 1917	Kingston SE, AU	daily rain	26.4 mm (1.0 in)	17.0 mm (0.7 in)	20 years	38 of 100 (Notable)
12 May 1917	Houston Wb City, US	daily low max	20.0 C (68.0 F)	4.4 C (7.9 F)	22 years	24 of 100 (Routine)
12 May 1917	Meadows, AU	daily rain	37.3 mm (1.5 in)	17.0 mm (0.7 in)	8 years	21 of 100 (Routine)
12 May 1917	Chatham, CA	daily rain	20.3 mm (0.8 in)	8.6 mm (0.34 in)	43 years	20 of 100 (Routine)
12 May 1917	Edmonton, CA	daily high min	12.2 C (54.0 F)	3.3 C (5.9 F)	27 years	19 of 100 (Routine)
12 May 1917	Blue Hill Coop, US	daily low max	6.7 C (44.1 F)	3.9 C (7.0 F)	30 years	18 of 100 (Routine)
12 May 1917	Yacka, AU	daily rain	17.5 mm (0.7 in)	3.8 mm (0.15 in)	32 years	17 of 100 (Routine)
12 May 1917	Englesberg Village, AU	daily rain	7.9 mm (0.31 in)	6.9 mm (0.27 in)	28 years	17 of 100 (Routine)
12 May 1917	Cape Northumberland, AU	daily rain	14.5 mm (0.6 in)	0.8 mm (0.03 in)	34 years	16 of 100 (Routine)
12 May 1917	Lucindale Post Office, AU	daily rain	17.3 mm (0.7 in)	6.4 mm (0.25 in)	11 years	16 of 100 (Routine)
12 May 1917	Trangie (Old Bundemar), AU	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	33 years	16 of 100 (Routine)
12 May 1917	Sandy Creek Tank, AU	daily rain	5.8 mm (0.23 in)	3.0 mm (0.12 in)	29 years	15 of 100 (Routine)
12 May 1917	Gilgoin, AU	daily rain	2.3 mm (0.09 in)	0.5 mm (0.02 in)	37 years	15 of 100 (Routine)
12 May 1917	Edmonton, CA	daily high max	25.6 C (78.1 F)	1.7 C (3.1 F)	31 years	15 of 100 (Routine)
12 May 1917	Blinman (Wirrealpa), AU	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	31 years	14 of 100 (Routine)
12 May 1917	Adelaide West Terrace, AU	daily low max	12.4 C (54.3 F)	1.7 C (3.1 F)	20 years	14 of 100 (Routine)
12 May 1917	Tarlee, AU	daily rain	11.4 mm (0.4 in)	4.3 mm (0.17 in)	11 years	14 of 100 (Routine)
12 May 1917	Cape Otway Lighthouse, AU	daily low max	11.2 C (52.2 F)	0.5 C (0.9 F)	29 years	14 of 100 (Routine)
12 May 1917	Middleton (Sar), ZA	daily rain	2.5 mm (0.10 in)	1.5 mm (0.06 in)	31 years	14 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

1814 to 1917

Records set or tied on this calendar date in each year from 1814 to 1917. 1917 had 54 records.

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

Records on 05-12 in each year
Year	Records
1814	2
1823	1
1825	1
1827	1
1834	1
1837	1
1838	1
1845	1
1847	1
1848	1
1849	2
1851	1
1855	2
1860	2
1862	2
1863	1
1867	1
1868	1
1872	2
1874	1
1877	1
1878	1
1879	1
1881	4
1882	5
1884	3
1885	2
1886	3
1887	1
1888	1
1889	1
1890	1
1891	4
1894	1
1895	1
1896	1
1897	7
1898	3
1900	3
1901	6
1902	5
1903	7
1904	11
1905	10
1906	20
1907	53
1908	12
1909	4
1910	9
1911	37
1912	46
1913	6
1914	36
1915	50
1916	42
1917	54
1918	113
1919	42
1920	19
1921	64
1922	43
1923	109
1924	245
1925	275
1926	121
1927	167
1928	192
1929	172
1930	500
1931	350
1932	199
1933	476
1934	293
1935	404
1936	329
1937	214
1938	394
1939	233
1940	440
1941	568
1942	418
1943	803
1944	368
1945	389
1946	653
1947	286
1948	390
1949	414
1950	283
1951	427
1952	711
1953	891
1954	305
1955	265
1956	1,568
1957	454
1958	714
1959	740
1960	1,583
1961	381
1962	713
1963	777
1964	401
1965	196
1966	909
1967	810
1968	890
1969	506
1970	698
1971	668
1972	641
1973	393
1974	702
1975	418
1976	541
1977	855
1978	802
1979	763
1980	684
1981	855
1982	763
1983	1,281
1984	887
1985	1,199
1986	473
1987	1,295
1988	619
1989	856
1990	617
1991	1,177
1992	1,022
1993	1,208
1994	738
1995	1,190
1996	1,420
1997	921
1998	1,576
1999	881
2000	1,486
2001	1,015
2002	1,027
2003	861
2004	1,054
2005	1,369
2006	797
2007	630
2008	858
2009	687
2010	1,250
2011	1,119
2012	660
2013	689
2014	949
2015	958
2016	421
2017	529
2018	819
2019	784
2020	1,338
2021	712
2022	1,930
2023	429
2024	447
2025	940
2026	1,110

Download the Data

Data for records on 1917-05-12: 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 5	35
5 to 10	5
10 to 15	1
15 to 20	2
20 to 25	0
25 to 30	1