Weather Records on 17 May 1945

799 weather records were set or tied worldwide on 17 May 1945. Highest significance: Caetite, BR.

Key Facts for 17 May 1945

On 17 May 1945, 799 weather records were set or tied at long-record stations worldwide.
112 were record highs and 464 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 19 monthly and 780 daily.
Caetite set a monthly record daily precipitation of 57.5 mm (2.3 in) on 17 May 1945.
Across 167 earlier years (1802 to 2026) the same calendar date averaged 432 records.

Record Map

799 stations

799 station records on 17 May 1945 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 May 1945: highest significance records shown on the map
Station	Country	Type	Value	Significance
Caetite	Brazil	Record daily precipitation	57.5 mm (2.3 in)	60 of 100 (Major)
Digby	Canada	Record daily precipitation	80.0 mm (3.1 in)	50 of 100 (Notable)
Jefferson 2 E	United States	Record daily precipitation	64.0 mm (2.5 in)	49 of 100 (Notable)
Marietta Wtr Wks	United States	Record daily precipitation	53.3 mm (2.1 in)	49 of 100 (Notable)
Hiram	United States	Record daily precipitation	54.4 mm (2.1 in)	48 of 100 (Notable)
Sagar Island	India	Record daily precipitation	91.7 mm (3.6 in)	46 of 100 (Notable)
Milan	Italy	Record high minimum temperature	21.9 C (71.4 F)	46 of 100 (Notable)
Oktjabrskij-Gorodok	Russia	Record daily precipitation	28.3 mm (1.1 in)	45 of 100 (Notable)
Jackson 3 NW	United States	Record daily precipitation	48.5 mm (1.9 in)	42 of 100 (Notable)
Zanesville Wwtp	United States	Record daily precipitation	40.9 mm (1.6 in)	42 of 100 (Notable)
New Cumberland L/D	United States	Record daily precipitation	48.8 mm (1.9 in)	42 of 100 (Notable)
Marion	United States	Record daily precipitation	68.6 mm (2.7 in)	41 of 100 (Notable)
Milan	Italy	Record high maximum temperature	33.7 C (92.7 F)	40 of 100 (Notable)
Mt Clemens Ang Base	United States	Record daily precipitation	48.5 mm (1.9 in)	40 of 100 (Notable)
Wauchope (Avondale Street)	Australia	Record daily precipitation	63.8 mm (2.5 in)	38 of 100 (Notable)
Karlstad	Sweden	Record snow depth	17.0 cm (6.7 in)	38 of 100 (Notable)
Urbana Wrf	United States	Record daily precipitation	48.8 mm (1.9 in)	37 of 100 (Notable)
Ebor (Wongwibinda)	Australia	Record daily precipitation	31.2 mm (1.2 in)	36 of 100 (Notable)
Sedgefield (Bundajon)	Australia	Record daily precipitation	41.1 mm (1.6 in)	36 of 100 (Notable)
Southampton	Canada	Record daily precipitation	52.6 mm (2.1 in)	36 of 100 (Notable)
Harrington (Oxley Anchorage Ca	Australia	Record daily precipitation	49.0 mm (1.9 in)	35 of 100 (Notable)
Jatusana	India	Record daily precipitation	63.5 mm (2.5 in)	35 of 100 (Notable)
Brinkley	United States	Record low maximum temperature	14.4 C (57.9 F)	35 of 100 (Notable)
Ironton	United States	Record daily precipitation	40.9 mm (1.6 in)	35 of 100 (Notable)
Hyndman	United States	Record daily precipitation	29.2 mm (1.1 in)	35 of 100 (Notable)
Bluefield 2 NW	United States	Record daily precipitation	31.0 mm (1.2 in)	35 of 100 (Notable)
Kempsey (Wide Street)	Australia	Record daily precipitation	58.2 mm (2.3 in)	34 of 100 (Routine)
Wingham (Lanark Close)	Australia	Record daily precipitation	50.8 mm (2.0 in)	34 of 100 (Routine)
Saentis	Switzerland	Record high minimum temperature	7.7 C (45.9 F)	34 of 100 (Routine)
Macon	United States	Record daily precipitation	43.9 mm (1.7 in)	34 of 100 (Routine)
Simcoe	Canada	Record low maximum temperature	7.2 C (45.0 F)	33 of 100 (Routine)
Sandvig	Denmark	Record high maximum temperature	23.6 C (74.5 F)	33 of 100 (Routine)
New Martinsville 4 NNE	United States	Record daily precipitation	52.6 mm (2.1 in)	33 of 100 (Routine)
Pontiac Wwtp	United States	Record daily precipitation	39.4 mm (1.6 in)	32 of 100 (Routine)
Trenton	United States	Record daily precipitation	34.8 mm (1.4 in)	32 of 100 (Routine)
Philo 3 SW	United States	Record daily precipitation	70.9 mm (2.8 in)	32 of 100 (Routine)
Willowghby East Lake	United States	Record daily precipitation	35.6 mm (1.4 in)	32 of 100 (Routine)
Carlisle	United States	Record daily precipitation	26.2 mm (1.0 in)	32 of 100 (Routine)
Stewarts River Public School	Australia	Record daily precipitation	96.3 mm (3.8 in)	31 of 100 (Routine)
Sugar Land	United States	Record low minimum temperature	9.4 C (48.9 F)	31 of 100 (Routine)
Burkes Garden	United States	Record daily precipitation	39.4 mm (1.6 in)	31 of 100 (Routine)
Conway	United States	Record low maximum temperature	15.6 C (60.1 F)	30 of 100 (Routine)
Collbran	United States	Record daily precipitation	26.7 mm (1.1 in)	30 of 100 (Routine)
Waverly	United States	Record daily precipitation	52.6 mm (2.1 in)	30 of 100 (Routine)
Danevang 1 W	United States	Record low minimum temperature	8.3 C (46.9 F)	30 of 100 (Routine)
Carbondale Sewage Plt	United States	Record low maximum temperature	11.1 C (52.0 F)	29 of 100 (Routine)
Clinton Forestry HQ	United States	Record low maximum temperature	18.3 C (64.9 F)	29 of 100 (Routine)
Greenville	United States	Record low maximum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Millport 4 NE	United States	Record daily precipitation	38.1 mm (1.5 in)	29 of 100 (Routine)
Philo	United States	Record daily precipitation	70.9 mm (2.8 in)	29 of 100 (Routine)
Acmetonia Lock 3	United States	Record daily precipitation	27.7 mm (1.1 in)	29 of 100 (Routine)
Greenville 2 NE	United States	Record daily precipitation	38.1 mm (1.5 in)	29 of 100 (Routine)
Burnet	United States	Record low minimum temperature	7.8 C (46.0 F)	29 of 100 (Routine)
Seward AP	United States	Record high minimum temperature	10.0 C (50.0 F)	29 of 100 (Routine)
El Dorado Goodwin Fld	United States	Record low maximum temperature	15.6 C (60.1 F)	29 of 100 (Routine)
Ashfield Bowling Club	Australia	Record daily precipitation	40.6 mm (1.6 in)	28 of 100 (Routine)
Brockville	Canada	Record low maximum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Griggsville	United States	Record low maximum temperature	8.9 C (48.0 F)	28 of 100 (Routine)
Arcadia	United States	Record low maximum temperature	11.7 C (53.1 F)	28 of 100 (Routine)
Chandler	United States	Record low minimum temperature	1.1 C (34.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

799 records

Records set or tied on 17 May 1945 by type: Highest daily maximum 51, Lowest daily maximum 242, Highest daily minimum 61, Lowest daily minimum 222, Heaviest daily rainfall 221, Heaviest daily snowfall 1, Deepest snow cover 1.

Records on 17 May 1945 by type
Record type	Records
Highest daily maximum	51
Lowest daily maximum	242
Highest daily minimum	61
Lowest daily minimum	222
Heaviest daily rainfall	221
Heaviest daily snowfall	1
Deepest snow cover	1

Records on 17 May 1945 by timescale: all-time 0, monthly 19, daily 780.

How Much Records Were Beaten By

689 broken records

Margins by which the 689 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 170.0. Ties are not counted.

Top 20 by Significance

17 May 1945

Top 20 records on 17 May 1945 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 May 1945	Caetite, BR	monthly rain	57.5 mm (2.3 in)	24.5 mm (1.0 in)	24 years	60 of 100 (Major)
17 May 1945	Digby, CA	monthly rain	80.0 mm (3.1 in)	26.9 mm (1.1 in)	13 years	50 of 100 (Notable)
17 May 1945	Jefferson 2 E, US	daily rain	64.0 mm (2.5 in)	44.2 mm (1.7 in)	23 years	49 of 100 (Notable)
17 May 1945	Marietta Wtr Wks, US	daily rain	53.3 mm (2.1 in)	26.6 mm (1.0 in)	43 years	49 of 100 (Notable)
17 May 1945	Hiram, US	daily rain	54.4 mm (2.1 in)	32.6 mm (1.3 in)	14 years	48 of 100 (Notable)
17 May 1945	Sagar Island, IN	daily rain	91.7 mm (3.6 in)	68.3 mm (2.7 in)	31 years	46 of 100 (Notable)
17 May 1945	Milan, IT	daily high min	21.9 C (71.4 F)	1.9 C (3.4 F)	163 years	46 of 100 (Notable)
17 May 1945	Oktjabrskij-Gorodok, RU	daily rain	28.3 mm (1.1 in)	14.8 mm (0.6 in)	43 years	45 of 100 (Notable)
17 May 1945	Jackson 3 NW, US	daily rain	48.5 mm (1.9 in)	33.5 mm (1.3 in)	20 years	42 of 100 (Notable)
17 May 1945	Zanesville Wwtp, US	daily rain	40.9 mm (1.6 in)	27.9 mm (1.1 in)	20 years	42 of 100 (Notable)
17 May 1945	New Cumberland L/D, US	daily rain	48.8 mm (1.9 in)	20.9 mm (0.8 in)	45 years	42 of 100 (Notable)
17 May 1945	Marion, US	daily rain	68.6 mm (2.7 in)	55.9 mm (2.2 in)	15 years	41 of 100 (Notable)
17 May 1945	Milan, IT	daily high max	33.7 C (92.7 F)	2.7 C (4.9 F)	81 years	40 of 100 (Notable)
17 May 1945	Mt Clemens Ang Base, US	daily rain	48.5 mm (1.9 in)	33.3 mm (1.3 in)	2 years	40 of 100 (Notable)
17 May 1945	Wauchope (Avondale Street), AU	daily rain	63.8 mm (2.5 in)	40.9 mm (1.6 in)	44 years	38 of 100 (Notable)
17 May 1945	Karlstad, SE	daily snow depth	17.0 cm (6.7 in)	17.0 cm (6.7 in)	52 years	38 of 100 (Notable)
17 May 1945	Urbana Wrf, US	daily rain	48.8 mm (1.9 in)	24.9 mm (1.0 in)	20 years	37 of 100 (Notable)
17 May 1945	Ebor (Wongwibinda), AU	daily rain	31.2 mm (1.2 in)	14.7 mm (0.6 in)	52 years	36 of 100 (Notable)
17 May 1945	Sedgefield (Bundajon), AU	daily rain	41.1 mm (1.6 in)	30.9 mm (1.2 in)	32 years	36 of 100 (Notable)
17 May 1945	Southampton, CA	monthly rain	52.6 mm (2.1 in)	2.8 mm (0.11 in)	55 years	36 of 100 (Notable)

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

1802 to 1945

Records set or tied on this calendar date in each year from 1802 to 1945. 1945 had 799 records.

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

Records on 05-17 in each year
Year	Records
1802	2
1803	1
1808	1
1816	1
1834	1
1837	1
1839	1
1847	2
1848	1
1851	1
1853	1
1855	1
1858	1
1859	1
1861	2
1862	2
1863	2
1864	1
1871	2
1872	2
1873	2
1874	4
1877	1
1878	1
1879	2
1880	1
1881	1
1882	2
1883	3
1885	1
1887	1
1888	2
1889	3
1891	8
1892	4
1893	3
1895	8
1896	2
1897	3
1898	6
1899	7
1900	12
1901	2
1902	3
1903	9
1904	12
1905	10
1906	22
1907	10
1908	5
1909	33
1910	16
1911	30
1912	16
1913	24
1914	24
1915	53
1916	49
1917	18
1918	56
1919	35
1920	46
1921	50
1922	30
1923	95
1924	80
1925	326
1926	133
1927	264
1928	127
1929	168
1930	421
1931	201
1932	288
1933	365
1934	373
1935	341
1936	270
1937	183
1938	340
1939	285
1940	338
1941	408
1942	589
1943	855
1944	521
1945	799
1946	586
1947	249
1948	412
1949	544
1950	371
1951	373
1952	777
1953	441
1954	298
1955	570
1956	1,166
1957	469
1958	331
1959	488
1960	402
1961	291
1962	1,325
1963	368
1964	417
1965	462
1966	489
1967	644
1968	564
1969	638
1970	711
1971	723
1972	610
1973	1,016
1974	1,302
1975	365
1976	426
1977	1,078
1978	872
1979	459
1980	768
1981	940
1982	476
1983	1,326
1984	925
1985	561
1986	921
1987	1,054
1988	1,096
1989	1,307
1990	1,135
1991	1,237
1992	1,025
1993	495
1994	858
1995	1,734
1996	1,706
1997	1,619
1998	1,080
1999	795
2000	825
2001	960
2002	964
2003	1,127
2004	769
2005	784
2006	1,522
2007	742
2008	1,309
2009	1,050
2010	880
2011	1,483
2012	711
2013	739
2014	1,062
2015	824
2016	741
2017	1,302
2018	726
2019	686
2020	496
2021	443
2022	479
2023	385
2024	566
2025	928
2026	745

Download the Data

Data for records on 1945-05-17: 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 25	669
25 to 50	16
50 to 75	2
75 to 100	1
100 to 125	0
125 to 150	0
150 to 175	1