Weather Records on 17 May 1947

249 weather records were set or tied worldwide on 17 May 1947. Highest significance: Homestead 985, US.

Key Facts for 17 May 1947

On 17 May 1947, 249 weather records were set or tied at long-record stations worldwide.
111 were record highs and 26 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 246 daily.
Homestead 985 set a daily record precipitation of 63.5 mm (2.5 in) on 17 May 1947.
Across 167 earlier years (1802 to 2026) the same calendar date averaged 435 records.

Record Map

249 stations

249 station records on 17 May 1947 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 May 1947: highest significance records shown on the map
Station	Country	Type	Value	Significance
Homestead 985	United States	Record daily precipitation	63.5 mm (2.5 in)	52 of 100 (Notable)
Longview	United States	Record daily precipitation	157.5 mm (6.2 in)	51 of 100 (Notable)
Cape Otway Lighthouse	Australia	Record high minimum temperature	18.3 C (64.9 F)	48 of 100 (Notable)
Jefferson	United States	Record daily precipitation	104.4 mm (4.1 in)	40 of 100 (Notable)
Mauzy	United States	Record daily precipitation	39.4 mm (1.6 in)	39 of 100 (Notable)
Rushville	United States	Record daily precipitation	39.4 mm (1.6 in)	38 of 100 (Notable)
Whiting	United States	Record daily precipitation	49.5 mm (1.9 in)	38 of 100 (Notable)
Grassy Hill Radio Otc	Australia	Record daily precipitation	32.8 mm (1.3 in)	37 of 100 (Notable)
New River	United States	Record daily precipitation	50.3 mm (2.0 in)	37 of 100 (Notable)
Hagansport	United States	Record daily precipitation	74.9 mm (2.9 in)	37 of 100 (Notable)
Belgaum	India	Record daily precipitation	40.1 mm (1.6 in)	35 of 100 (Notable)
Islampur	India	Record daily precipitation	44.5 mm (1.8 in)	35 of 100 (Notable)
Greensburg	United States	Record daily precipitation	52.8 mm (2.1 in)	35 of 100 (Notable)
Greensburg	United States	Record daily precipitation	48.3 mm (1.9 in)	32 of 100 (Routine)
Toledo Blade	United States	Record daily precipitation	46.5 mm (1.8 in)	30 of 100 (Routine)
Eufaula 6 SSW	United States	Record daily precipitation	95.8 mm (3.8 in)	30 of 100 (Routine)
Marshall	United States	Record daily precipitation	55.9 mm (2.2 in)	30 of 100 (Routine)
Ipira (Camisao)	Brazil	Record daily precipitation	35.0 mm (1.4 in)	29 of 100 (Routine)
Coldwater St School	United States	Record daily precipitation	45.0 mm (1.8 in)	28 of 100 (Routine)
Beloit	United States	Record daily precipitation	31.8 mm (1.3 in)	28 of 100 (Routine)
Archer Point Lighthouse	Australia	Record daily precipitation	29.0 mm (1.1 in)	27 of 100 (Routine)
Richmond Wtr Wks	United States	Record daily precipitation	46.5 mm (1.8 in)	27 of 100 (Routine)
Dresden	United States	Record daily precipitation	25.4 mm (1.0 in)	27 of 100 (Routine)
Duck Hill	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Nacogdoches	United States	Record daily precipitation	73.4 mm (2.9 in)	27 of 100 (Routine)
Cooktown Post Office	Australia	Record daily precipitation	46.0 mm (1.8 in)	26 of 100 (Routine)
1 WSW Princeton	United States	Record daily precipitation	47.5 mm (1.9 in)	26 of 100 (Routine)
Mt Pleasant	United States	Record daily precipitation	50.5 mm (2.0 in)	26 of 100 (Routine)
Karlshamn	Sweden	Record high maximum temperature	24.0 C (75.2 F)	25 of 100 (Routine)
Blanco	United States	Record daily precipitation	25.7 mm (1.0 in)	25 of 100 (Routine)
Orebro	Sweden	Record high maximum temperature	25.5 C (77.9 F)	24 of 100 (Routine)
Leitchfield 2 N	United States	Record daily precipitation	25.1 mm (1.0 in)	24 of 100 (Routine)
Wagga Wagga (Kooringal)	Australia	Record high minimum temperature	15.0 C (59.0 F)	23 of 100 (Routine)
Melbourne Regional Office	Australia	Record high minimum temperature	14.9 C (58.8 F)	23 of 100 (Routine)
Low Head (Comparison)	Australia	Record high maximum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Low Head (Comparison)	Australia	Record high minimum temperature	16.1 C (61.0 F)	23 of 100 (Routine)
Medha	India	Record daily precipitation	29.7 mm (1.2 in)	23 of 100 (Routine)
Warsaw	United States	Record daily precipitation	28.7 mm (1.1 in)	23 of 100 (Routine)
Edmonton 3 W	United States	Record daily precipitation	26.7 mm (1.1 in)	23 of 100 (Routine)
Huntsville	United States	Record daily precipitation	73.9 mm (2.9 in)	23 of 100 (Routine)
Myrup	Australia	Record daily precipitation	25.4 mm (1.0 in)	22 of 100 (Routine)
Visby_Flygplats	Sweden	Record high maximum temperature	22.7 C (72.9 F)	22 of 100 (Routine)
Vanersborg	Sweden	Record high maximum temperature	24.5 C (76.1 F)	22 of 100 (Routine)
Mena	United States	Record daily precipitation	33.8 mm (1.3 in)	22 of 100 (Routine)
Raleigh State UNIV	United States	Record high maximum temperature	34.4 C (93.9 F)	22 of 100 (Routine)
Selinsgrove 2 S	United States	Record low maximum temperature	16.1 C (61.0 F)	22 of 100 (Routine)
Byrdstown 1 W	United States	Record daily precipitation	28.7 mm (1.1 in)	22 of 100 (Routine)
Greenville Kgvl Radio	United States	Record daily precipitation	39.6 mm (1.6 in)	22 of 100 (Routine)
Shirala	India	Record daily precipitation	36.8 mm (1.4 in)	21 of 100 (Routine)
Shelbyville Sewage Plt	United States	Record daily precipitation	49.5 mm (1.9 in)	21 of 100 (Routine)
Sikeston	United States	Record high minimum temperature	20.0 C (68.0 F)	21 of 100 (Routine)
Salisbury	United States	Record high maximum temperature	35.6 C (96.1 F)	21 of 100 (Routine)
Dover 1 W	United States	Record high minimum temperature	21.1 C (70.0 F)	21 of 100 (Routine)
Queimadas	Brazil	Record daily precipitation	14.4 mm (0.6 in)	20 of 100 (Routine)
Tashkent	Uzbekistan	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Malsiras	India	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Tobolsk	Russia	Record daily precipitation	10.5 mm (0.4 in)	20 of 100 (Routine)
Glenwood 3SW	United States	Record daily precipitation	9.7 mm (0.38 in)	20 of 100 (Routine)
Idomia	South Africa	Record daily precipitation	46.0 mm (1.8 in)	20 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record high maximum temperature	26.3 C (79.3 F)	20 of 100 (Routine)

Counts by Type and Timescale

249 records

Records set or tied on 17 May 1947 by type: Highest daily maximum 41, Lowest daily maximum 12, Highest daily minimum 70, Lowest daily minimum 14, Heaviest daily rainfall 112.

Records on 17 May 1947 by type
Record type	Records
Highest daily maximum	41
Lowest daily maximum	12
Highest daily minimum	70
Lowest daily minimum	14
Heaviest daily rainfall	112
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 May 1947 by timescale: all-time 0, monthly 3, daily 246.

How Much Records Were Beaten By

195 broken records

Margins by which the 195 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 65.6. Ties are not counted.

Top 20 by Significance

17 May 1947

Top 20 records on 17 May 1947 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 May 1947	Homestead 985, US	daily rain	63.5 mm (2.5 in)	52.3 mm (2.1 in)	30 years	52 of 100 (Notable)
17 May 1947	Longview, US	monthly rain	157.5 mm (6.2 in)	45.7 mm (1.8 in)	39 years	51 of 100 (Notable)
17 May 1947	Cape Otway Lighthouse, AU	daily high min	18.3 C (64.9 F)	3.9 C (7.0 F)	78 years	48 of 100 (Notable)
17 May 1947	Jefferson, US	daily rain	104.4 mm (4.1 in)	63.3 mm (2.5 in)	16 years	40 of 100 (Notable)
17 May 1947	Mauzy, US	daily rain	39.4 mm (1.6 in)	26.7 mm (1.1 in)	26 years	39 of 100 (Notable)
17 May 1947	Rushville, US	daily rain	39.4 mm (1.6 in)	26.7 mm (1.1 in)	26 years	38 of 100 (Notable)
17 May 1947	Whiting, US	daily rain	49.5 mm (1.9 in)	30.2 mm (1.2 in)	26 years	38 of 100 (Notable)
17 May 1947	Grassy Hill Radio Otc, AU	daily rain	32.8 mm (1.3 in)	14.3 mm (0.6 in)	45 years	37 of 100 (Notable)
17 May 1947	New River, US	daily rain	50.3 mm (2.0 in)	26.4 mm (1.0 in)	33 years	37 of 100 (Notable)
17 May 1947	Hagansport, US	daily rain	74.9 mm (2.9 in)	36.3 mm (1.4 in)	36 years	37 of 100 (Notable)
17 May 1947	Belgaum, IN	daily rain	40.1 mm (1.6 in)	23.8 mm (0.9 in)	36 years	35 of 100 (Notable)
17 May 1947	Islampur, IN	daily rain	44.5 mm (1.8 in)	24.2 mm (1.0 in)	45 years	35 of 100 (Notable)
17 May 1947	Greensburg, US	daily rain	52.8 mm (2.1 in)	29.4 mm (1.2 in)	2 years	35 of 100 (Notable)
17 May 1947	Greensburg, US	daily rain	48.3 mm (1.9 in)	23.4 mm (0.9 in)	24 years	32 of 100 (Routine)
17 May 1947	Toledo Blade, US	daily rain	46.5 mm (1.8 in)	19.8 mm (0.8 in)	4 years	30 of 100 (Routine)
17 May 1947	Eufaula 6 SSW, US	daily rain	95.8 mm (3.8 in)	65.6 mm (2.6 in)	0 years	30 of 100 (Routine)
17 May 1947	Marshall, US	daily rain	55.9 mm (2.2 in)	24.1 mm (0.9 in)	36 years	30 of 100 (Routine)
17 May 1947	Ipira (Camisao), BR	daily rain	35.0 mm (1.4 in)	12.5 mm (0.5 in)	22 years	29 of 100 (Routine)
17 May 1947	Coldwater St School, US	daily rain	45.0 mm (1.8 in)	16.3 mm (0.6 in)	26 years	28 of 100 (Routine)
17 May 1947	Beloit, US	daily rain	31.8 mm (1.3 in)	8.9 mm (0.35 in)	52 years	28 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

1802 to 1947

Records set or tied on this calendar date in each year from 1802 to 1947. 1947 had 249 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 1947-05-17: 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 10	156
10 to 20	20
20 to 30	12
30 to 40	2
40 to 50	2
50 to 60	1
60 to 70	2