Weather Records on 20 May 2017

1,214 weather records were set or tied worldwide on 20 May 2017. Highest significance: Narooma Rvcp, AU.

Key Facts for 20 May 2017

On 20 May 2017, 1,214 weather records were set or tied at long-record stations worldwide.
380 were record highs and 362 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 21 monthly and 1,192 daily.
Narooma Rvcp set a daily record precipitation of 92.0 mm (3.6 in) on 20 May 2017.
Across 162 earlier years (1802 to 2026) the same calendar date averaged 451 records.

Record Map

1,214 stations

1,214 station records on 20 May 2017 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 May 2017: highest significance records shown on the map
Station	Country	Type	Value	Significance
Narooma Rvcp	Australia	Record daily precipitation	92.0 mm (3.6 in)	72 of 100 (Major)
Fairlight Station	Australia	Record daily precipitation	62.2 mm (2.4 in)	69 of 100 (Major)
Wetumpka	United States	Record daily precipitation	147.3 mm (5.8 in)	68 of 100 (Major)
Montgomery AP	United States	Record daily precipitation	207.0 mm (8.1 in)	68 of 100 (Major)
Birchip (Woodlands)	Australia	Record daily precipitation	33.2 mm (1.3 in)	67 of 100 (Major)
Scottsville	United States	Record daily precipitation	110.0 mm (4.3 in)	67 of 100 (Major)
Turrawan (Wallah)	Australia	Record daily precipitation	60.0 mm (2.4 in)	66 of 100 (Major)
Purdum	United States	Record daily snowfall	12.7 cm (5.0 in)	65 of 100 (Major)
Cooma (Kiaora)	Australia	Record daily precipitation	48.0 mm (1.9 in)	63 of 100 (Major)
Bowning (Wanganui)	Australia	Record daily precipitation	55.8 mm (2.2 in)	63 of 100 (Major)
Boothulla	Australia	Record daily precipitation	31.4 mm (1.2 in)	62 of 100 (Major)
Piqua	United States	Record daily precipitation	50.8 mm (2.0 in)	62 of 100 (Major)
Culcairn Bowling Club	Australia	Record daily precipitation	45.0 mm (1.8 in)	61 of 100 (Major)
Michelago (Soglio)	Australia	Record daily precipitation	54.0 mm (2.1 in)	60 of 100 (Major)
Dalgety (Hamilton St)	Australia	Record daily precipitation	54.8 mm (2.2 in)	59 of 100 (Notable)
Haikou	China	Record daily precipitation	115.6 mm (4.6 in)	59 of 100 (Notable)
Pikeville Ksp Post 9	United States	Record daily precipitation	97.0 mm (3.8 in)	59 of 100 (Notable)
Barraba Post Office	Australia	Record daily precipitation	37.4 mm (1.5 in)	58 of 100 (Notable)
Boggabri (Penryn)	Australia	Record daily precipitation	48.2 mm (1.9 in)	58 of 100 (Notable)
Flinders Island Airport	Australia	Record daily precipitation	73.8 mm (2.9 in)	58 of 100 (Notable)
Du Quoin 4 SE	United States	Record daily precipitation	69.3 mm (2.7 in)	58 of 100 (Notable)
Cootamundra (Landgrove)	Australia	Record daily precipitation	44.0 mm (1.7 in)	57 of 100 (Notable)
Plainville 4WNW	United States	Record daily precipitation	46.7 mm (1.8 in)	57 of 100 (Notable)
Paint Rock	United States	Record daily precipitation	79.5 mm (3.1 in)	57 of 100 (Notable)
Bodalla Post Office	Australia	Record daily precipitation	99.6 mm (3.9 in)	56 of 100 (Notable)
Memana (Babel Farm)	Australia	Record daily precipitation	65.6 mm (2.6 in)	56 of 100 (Notable)
Whitemark Post Office	Australia	Record daily precipitation	64.2 mm (2.5 in)	56 of 100 (Notable)
Vandalia	United States	Record daily precipitation	55.4 mm (2.2 in)	56 of 100 (Notable)
Purdum	United States	Record daily precipitation	63.5 mm (2.5 in)	56 of 100 (Notable)
South Forest (Plummers Road)	Australia	Record daily precipitation	64.8 mm (2.6 in)	55 of 100 (Notable)
Mawbanna (Mawbanna Road)	Australia	Record daily precipitation	57.8 mm (2.3 in)	55 of 100 (Notable)
Gravette	United States	Record daily precipitation	81.0 mm (3.2 in)	55 of 100 (Notable)
Kremmling	United States	Record snow depth	15.2 cm (6.0 in)	55 of 100 (Notable)
Pinckneyville 2 N	United States	Record daily precipitation	81.8 mm (3.2 in)	54 of 100 (Notable)
Blackville Post Office	Australia	Record daily precipitation	37.2 mm (1.5 in)	53 of 100 (Notable)
Verona (Shiloh)	Australia	Record daily precipitation	105.6 mm (4.2 in)	53 of 100 (Notable)
Georgetown	United States	Record snow depth	22.9 cm (9.0 in)	53 of 100 (Notable)
Gunnedah Pool	Australia	Record daily precipitation	38.0 mm (1.5 in)	52 of 100 (Notable)
Tallapoosa Wtr Plt	United States	Record daily precipitation	177.8 mm (7.0 in)	52 of 100 (Notable)
Plant City	United States	Record high maximum temperature	37.8 C (100.0 F)	52 of 100 (Notable)
Attunga (the Pines)	Australia	Record daily precipitation	36.0 mm (1.4 in)	51 of 100 (Notable)
Bingara (Keera)	Australia	Record daily precipitation	36.0 mm (1.4 in)	50 of 100 (Notable)
Nashville 1 E	United States	Record daily precipitation	50.8 mm (2.0 in)	50 of 100 (Notable)
Hillsboro	United States	Record daily precipitation	79.5 mm (3.1 in)	50 of 100 (Notable)
Breeza (the Park)	Australia	Record daily precipitation	36.6 mm (1.4 in)	49 of 100 (Notable)
Attunga (Tarana)	Australia	Record daily precipitation	32.0 mm (1.3 in)	49 of 100 (Notable)
Gowrie South	Australia	Record daily precipitation	43.0 mm (1.7 in)	49 of 100 (Notable)
Greenethorpe (Iandra)	Australia	Record daily precipitation	66.0 mm (2.6 in)	49 of 100 (Notable)
Murringo (Yallambee)	Australia	Record daily precipitation	53.6 mm (2.1 in)	49 of 100 (Notable)
Leroy 5 WSW	United States	Record daily snowfall	5.1 cm (2.0 in)	49 of 100 (Notable)
Atchison	United States	Record daily precipitation	45.7 mm (1.8 in)	49 of 100 (Notable)
Ainsworth	United States	Record daily precipitation	40.1 mm (1.6 in)	49 of 100 (Notable)
Arnold	United States	Record daily precipitation	69.9 mm (2.8 in)	49 of 100 (Notable)
Cooma Visitors Centre	Australia	Record daily precipitation	39.0 mm (1.5 in)	48 of 100 (Notable)
Tubbul (Keiraville)	Australia	Record daily precipitation	36.8 mm (1.4 in)	48 of 100 (Notable)
Carbondale Sewage Plt	United States	Record daily precipitation	48.5 mm (1.9 in)	48 of 100 (Notable)
Mobile	United States	Record daily precipitation	111.0 mm (4.4 in)	48 of 100 (Notable)
Sutton the Anchorage	Australia	Record daily precipitation	27.6 mm (1.1 in)	47 of 100 (Notable)
Mount Horeb (Marathorn)	Australia	Record daily precipitation	40.4 mm (1.6 in)	47 of 100 (Notable)
Temora Ambulance Station	Australia	Record daily precipitation	30.2 mm (1.2 in)	47 of 100 (Notable)

Counts by Type and Timescale

1,214 records

Records set or tied on 20 May 2017 by type: Highest daily maximum 114, Lowest daily maximum 236, Highest daily minimum 266, Lowest daily minimum 126, Heaviest daily rainfall 440, Heaviest daily snowfall 12, Deepest snow cover 20.

Records on 20 May 2017 by type
Record type	Records
Highest daily maximum	114
Lowest daily maximum	236
Highest daily minimum	266
Lowest daily minimum	126
Heaviest daily rainfall	440
Heaviest daily snowfall	12
Deepest snow cover	20

Records on 20 May 2017 by timescale: all-time 1, monthly 21, daily 1,192.

How Much Records Were Beaten By

1,001 broken records

Margins by which the 1,001 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 457.0. Ties are not counted.

Top 20 by Significance

20 May 2017

Top 20 records on 20 May 2017 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 May 2017	Narooma Rvcp, AU	daily rain	92.0 mm (3.6 in)	69.9 mm (2.8 in)	74 years	72 of 100 (Major)
20 May 2017	Fairlight Station, AU	daily rain	62.2 mm (2.4 in)	42.9 mm (1.7 in)	84 years	69 of 100 (Major)
20 May 2017	Wetumpka, US	monthly rain	147.3 mm (5.8 in)	45.7 mm (1.8 in)	60 years	68 of 100 (Major)
20 May 2017	Montgomery AP, US	monthly rain	207.0 mm (8.1 in)	74.2 mm (2.9 in)	39 years	68 of 100 (Major)
20 May 2017	Birchip (Woodlands), AU	daily rain	33.2 mm (1.3 in)	18.2 mm (0.7 in)	120 years	67 of 100 (Major)
20 May 2017	Scottsville, US	daily rain	110.0 mm (4.3 in)	57.7 mm (2.3 in)	70 years	67 of 100 (Major)
20 May 2017	Turrawan (Wallah), AU	daily rain	60.0 mm (2.4 in)	40.9 mm (1.6 in)	84 years	66 of 100 (Major)
20 May 2017	Purdum, US	daily snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	112 years	65 of 100 (Major)
20 May 2017	Cooma (Kiaora), AU	daily rain	48.0 mm (1.9 in)	26.2 mm (1.0 in)	54 years	63 of 100 (Major)
20 May 2017	Bowning (Wanganui), AU	daily rain	55.8 mm (2.2 in)	30.4 mm (1.2 in)	74 years	63 of 100 (Major)
20 May 2017	Boothulla, AU	daily rain	31.4 mm (1.2 in)	25.0 mm (1.0 in)	103 years	62 of 100 (Major)
20 May 2017	Piqua, US	daily rain	50.8 mm (2.0 in)	24.4 mm (1.0 in)	88 years	62 of 100 (Major)
20 May 2017	Culcairn Bowling Club, AU	daily rain	45.0 mm (1.8 in)	22.6 mm (0.9 in)	71 years	61 of 100 (Major)
20 May 2017	Michelago (Soglio), AU	daily rain	54.0 mm (2.1 in)	32.9 mm (1.3 in)	74 years	60 of 100 (Major)
20 May 2017	Dalgety (Hamilton St), AU	daily rain	54.8 mm (2.2 in)	42.8 mm (1.7 in)	32 years	59 of 100 (Notable)
20 May 2017	Haikou, CN	daily rain	115.6 mm (4.6 in)	75.3 mm (3.0 in)	46 years	59 of 100 (Notable)
20 May 2017	Pikeville Ksp Post 9, US	monthly rain	97.0 mm (3.8 in)	38.6 mm (1.5 in)	33 years	59 of 100 (Notable)
20 May 2017	Barraba Post Office, AU	daily rain	37.4 mm (1.5 in)	20.9 mm (0.8 in)	96 years	58 of 100 (Notable)
20 May 2017	Boggabri (Penryn), AU	daily rain	48.2 mm (1.9 in)	21.0 mm (0.8 in)	96 years	58 of 100 (Notable)
20 May 2017	Flinders Island Airport, AU	daily rain	73.8 mm (2.9 in)	48.8 mm (1.9 in)	36 years	58 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 2017

Records set or tied on this calendar date in each year from 1802 to 2017. 2017 had 1,214 records.

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

Records on 05-20 in each year
Year	Records
1802	1
1803	1
1804	1
1815	1
1825	1
1837	1
1844	1
1845	3
1847	1
1854	1
1858	3
1861	1
1862	1
1865	1
1867	1
1868	2
1870	3
1871	2
1876	2
1877	3
1879	1
1880	2
1884	2
1885	1
1887	2
1889	3
1890	3
1891	5
1892	3
1893	1
1894	6
1895	3
1896	3
1897	3
1898	4
1899	4
1900	1
1901	5
1902	11
1903	19
1904	4
1905	4
1906	22
1907	35
1908	23
1909	10
1910	20
1911	82
1912	20
1913	10
1914	16
1915	42
1916	29
1917	46
1918	92
1919	56
1920	44
1921	234
1922	40
1923	125
1924	189
1925	251
1926	128
1927	118
1928	138
1929	323
1930	129
1931	451
1932	689
1933	449
1934	582
1935	259
1936	207
1937	270
1938	331
1939	266
1940	337
1941	378
1942	337
1943	802
1944	315
1945	498
1946	339
1947	358
1948	514
1949	586
1950	327
1951	288
1952	615
1953	518
1954	822
1955	421
1956	565
1957	728
1958	378
1959	785
1960	612
1961	333
1962	773
1963	732
1964	517
1965	200
1966	416
1967	587
1968	743
1969	885
1970	310
1971	653
1972	612
1973	419
1974	893
1975	1,332
1976	837
1977	553
1978	534
1979	683
1980	751
1981	1,540
1982	554
1983	1,307
1984	867
1985	426
1986	790
1987	1,036
1988	805
1989	764
1990	722
1991	925
1992	1,200
1993	1,208
1994	778
1995	734
1996	1,749
1997	1,106
1998	1,124
1999	673
2000	991
2001	847
2002	2,299
2003	1,201
2004	746
2005	929
2006	1,006
2007	565
2008	999
2009	1,529
2010	1,011
2011	1,117
2012	604
2013	919
2014	629
2015	1,001
2016	692
2017	1,214
2018	460
2019	1,483
2020	784
2021	904
2022	1,643
2023	1,106
2024	478
2025	969
2026	696

Download the Data

Data for records on 2017-05-20: 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Histogram of margins by which records were beaten on 20 May 2017
Margin	Records
0 to 100	988
100 to 200	9
200 to 300	3
300 to 400	0
400 to 500	1