Weather Records on 17 May 2021

443 weather records were set or tied worldwide on 17 May 2021. Highest significance: Lafayette Rgnl AP, US.

Key Facts for 17 May 2021

On 17 May 2021, 443 weather records were set or tied at long-record stations worldwide.
171 were record highs and 56 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 433 daily.
Lafayette Rgnl AP set a daily record precipitation of 161.8 mm (6.4 in) on 17 May 2021.
Across 167 earlier years (1802 to 2026) the same calendar date averaged 434 records.

Record Map

443 stations

443 station records on 17 May 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 May 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Lafayette Rgnl AP	United States	Record daily precipitation	161.8 mm (6.4 in)	75 of 100 (Major)
Syracuse 1NE	United States	Record daily precipitation	83.1 mm (3.3 in)	70 of 100 (Major)
Mahabaleshwar	India	Record daily precipitation	84.1 mm (3.3 in)	64 of 100 (Major)
Taylorville 2SE	United States	Record daily precipitation	82.0 mm (3.2 in)	62 of 100 (Major)
Garden City Exp STN	United States	Record daily precipitation	57.2 mm (2.3 in)	61 of 100 (Major)
Austwell	United States	Record daily precipitation	91.4 mm (3.6 in)	61 of 100 (Major)
Carville 2 SW	United States	Record daily precipitation	172.7 mm (6.8 in)	60 of 100 (Major)
Windsor	United States	Record daily precipitation	88.9 mm (3.5 in)	58 of 100 (Notable)
Esashi	Japan	Record daily precipitation	66.0 mm (2.6 in)	57 of 100 (Notable)
Jasper	United States	Record daily precipitation	191.3 mm (7.5 in)	53 of 100 (Notable)
Koloa Mauka 994	United States	Record daily precipitation	88.9 mm (3.5 in)	53 of 100 (Notable)
Port Arthur SE Tx Rgnl AP	United States	Record daily precipitation	250.4 mm (9.9 in)	52 of 100 (Notable)
Canyon	United States	Record daily precipitation	78.5 mm (3.1 in)	51 of 100 (Notable)
Lake Charles	United States	Record daily precipitation	317.2 mm (12.5 in)	51 of 100 (Notable)
Bonny Dam 2NE	United States	Record daily precipitation	73.7 mm (2.9 in)	50 of 100 (Notable)
Imperial	United States	Record daily precipitation	66.0 mm (2.6 in)	50 of 100 (Notable)
Saarbrucken/Ensheim	Germany	Record daily precipitation	28.9 mm (1.1 in)	49 of 100 (Notable)
Kanazawa	Japan	Record daily precipitation	94.0 mm (3.7 in)	49 of 100 (Notable)
Akita	Japan	Record daily precipitation	72.4 mm (2.9 in)	48 of 100 (Notable)
Kountze	United States	Record daily precipitation	101.6 mm (4.0 in)	48 of 100 (Notable)
Scott City	United States	Record daily precipitation	40.6 mm (1.6 in)	47 of 100 (Notable)
Ciudad Victoria	Mexico	Record daily precipitation	56.4 mm (2.2 in)	46 of 100 (Notable)
Mattoon	United States	Record daily precipitation	81.3 mm (3.2 in)	46 of 100 (Notable)
Imperial Muni AP	United States	Record daily precipitation	72.6 mm (2.9 in)	46 of 100 (Notable)
Leoti	United States	Record daily precipitation	38.6 mm (1.5 in)	45 of 100 (Notable)
Baton Rouge Metro AP	United States	Record daily precipitation	110.0 mm (4.3 in)	45 of 100 (Notable)
New Iberia AP - Acadiana Rgnl	United States	Record daily precipitation	110.2 mm (4.3 in)	44 of 100 (Notable)
Marshall	United States	Record daily precipitation	82.6 mm (3.3 in)	43 of 100 (Notable)
Fukaura	Japan	Record daily precipitation	81.0 mm (3.2 in)	42 of 100 (Notable)
Comitan Chis.	Mexico	Record daily precipitation	58.2 mm (2.3 in)	42 of 100 (Notable)
Jackvik	Sweden	Record daily precipitation	25.6 mm (1.0 in)	42 of 100 (Notable)
Amarillo	United States	Record daily precipitation	36.8 mm (1.4 in)	42 of 100 (Notable)
Albany	Australia	Record high maximum temperature	26.0 C (78.8 F)	40 of 100 (Notable)
Kawaguchiko	Japan	Record high minimum temperature	16.8 C (62.2 F)	39 of 100 (Notable)
Uralsk	Kazakhstan	Record high maximum temperature	34.4 C (93.9 F)	39 of 100 (Notable)
Perm	Russia	Record high maximum temperature	29.8 C (85.6 F)	39 of 100 (Notable)
Oita	Japan	Record daily precipitation	100.1 mm (3.9 in)	38 of 100 (Notable)
Danevang 1 W	United States	Record daily precipitation	113.3 mm (4.5 in)	37 of 100 (Notable)
Sam Rayburn Dam	United States	Record daily precipitation	228.6 mm (9.0 in)	37 of 100 (Notable)
Narrogin	Australia	Record high minimum temperature	15.0 C (59.0 F)	36 of 100 (Notable)
Bhuj-Rudramata	India	Record high minimum temperature	29.4 C (84.9 F)	36 of 100 (Notable)
Matsue	Japan	Record daily precipitation	78.0 mm (3.1 in)	36 of 100 (Notable)
Malacca	Malaysia	Record daily precipitation	73.9 mm (2.9 in)	36 of 100 (Notable)
Ellsworth	United States	Record daily precipitation	39.4 mm (1.6 in)	36 of 100 (Notable)
Buffalo Bill Dam	United States	Record high maximum temperature	28.3 C (82.9 F)	36 of 100 (Notable)
Ilyinskiy	Russia	Record high maximum temperature	20.8 C (69.4 F)	35 of 100 (Notable)
Leesville	United States	Record daily precipitation	66.5 mm (2.6 in)	35 of 100 (Notable)
Toyama	Japan	Record daily precipitation	80.0 mm (3.1 in)	34 of 100 (Routine)
Vanavara	Russia	Record low minimum temperature	-9.2 C (15.4 F)	34 of 100 (Routine)
Mae Sot	Thailand	Record high minimum temperature	27.0 C (80.6 F)	34 of 100 (Routine)
Fushiki	Japan	Record daily precipitation	57.9 mm (2.3 in)	33 of 100 (Routine)
Belgrade (Observatory)	Serbia	Record daily precipitation	33.0 mm (1.3 in)	33 of 100 (Routine)
Sarapul	Russia	Record high minimum temperature	18.0 C (64.4 F)	33 of 100 (Routine)
Bowling Green 1 W	United States	Record daily precipitation	53.8 mm (2.1 in)	33 of 100 (Routine)
Lord Howe Island Aero	Australia	Record low minimum temperature	11.8 C (53.2 F)	32 of 100 (Routine)
Sakai	Japan	Record daily precipitation	68.1 mm (2.7 in)	32 of 100 (Routine)
Tadotsu	Japan	Record high minimum temperature	19.1 C (66.4 F)	32 of 100 (Routine)
Dzardzan	Russia	Record high maximum temperature	18.9 C (66.0 F)	32 of 100 (Routine)
McPherson	United States	Record daily precipitation	65.8 mm (2.6 in)	32 of 100 (Routine)
Beaver Fire Twr	United States	Record daily precipitation	82.6 mm (3.3 in)	32 of 100 (Routine)

Counts by Type and Timescale

443 records

Records set or tied on 17 May 2021 by type: Highest daily maximum 76, Lowest daily maximum 20, Highest daily minimum 95, Lowest daily minimum 36, Heaviest daily rainfall 216.

Records on 17 May 2021 by type
Record type	Records
Highest daily maximum	76
Lowest daily maximum	20
Highest daily minimum	95
Lowest daily minimum	36
Heaviest daily rainfall	216
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 May 2021 by timescale: all-time 0, monthly 10, daily 433.

How Much Records Were Beaten By

402 broken records

Margins by which the 402 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 276.1. Ties are not counted.

Top 20 by Significance

17 May 2021

Top 20 records on 17 May 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 May 2021	Lafayette Rgnl AP, US	daily rain	161.8 mm (6.4 in)	85.6 mm (3.4 in)	116 years	75 of 100 (Major)
17 May 2021	Syracuse 1NE, US	daily rain	83.1 mm (3.3 in)	64.8 mm (2.6 in)	68 years	70 of 100 (Major)
17 May 2021	Mahabaleshwar, IN	daily rain	84.1 mm (3.3 in)	44.7 mm (1.8 in)	116 years	64 of 100 (Major)
17 May 2021	Taylorville 2SE, US	daily rain	82.0 mm (3.2 in)	39.1 mm (1.5 in)	78 years	62 of 100 (Major)
17 May 2021	Garden City Exp STN, US	daily rain	57.2 mm (2.3 in)	43.2 mm (1.7 in)	63 years	61 of 100 (Major)
17 May 2021	Austwell, US	daily rain	91.4 mm (3.6 in)	48.2 mm (1.9 in)	92 years	61 of 100 (Major)
17 May 2021	Carville 2 SW, US	daily rain	172.7 mm (6.8 in)	103.6 mm (4.1 in)	40 years	60 of 100 (Major)
17 May 2021	Windsor, US	daily rain	88.9 mm (3.5 in)	31.5 mm (1.2 in)	78 years	58 of 100 (Notable)
17 May 2021	Esashi, JP	daily rain	66.0 mm (2.6 in)	39.5 mm (1.6 in)	52 years	57 of 100 (Notable)
17 May 2021	Jasper, US	monthly rain	191.3 mm (7.5 in)	72.4 mm (2.9 in)	2 years	53 of 100 (Notable)
17 May 2021	Koloa Mauka 994, US	daily rain	88.9 mm (3.5 in)	36.3 mm (1.4 in)	71 years	53 of 100 (Notable)
17 May 2021	Port Arthur SE Tx Rgnl AP, US	daily rain	250.4 mm (9.9 in)	223.2 mm (8.8 in)	19 years	52 of 100 (Notable)
17 May 2021	Canyon, US	daily rain	78.5 mm (3.1 in)	47.5 mm (1.9 in)	32 years	51 of 100 (Notable)
17 May 2021	Lake Charles, US	daily rain	317.2 mm (12.5 in)	276.1 mm (10.9 in)	16 years	51 of 100 (Notable)
17 May 2021	Bonny Dam 2NE, US	daily rain	73.7 mm (2.9 in)	30.0 mm (1.2 in)	59 years	50 of 100 (Notable)
17 May 2021	Imperial, US	daily rain	66.0 mm (2.6 in)	24.1 mm (0.9 in)	67 years	50 of 100 (Notable)
17 May 2021	Saarbrucken/Ensheim, DE	daily rain	28.9 mm (1.1 in)	17.1 mm (0.7 in)	56 years	49 of 100 (Notable)
17 May 2021	Kanazawa, JP	daily rain	94.0 mm (3.7 in)	43.5 mm (1.7 in)	40 years	49 of 100 (Notable)
17 May 2021	Akita, JP	daily rain	72.4 mm (2.9 in)	33.9 mm (1.3 in)	52 years	48 of 100 (Notable)
17 May 2021	Kountze, US	daily rain	101.6 mm (4.0 in)	98.6 mm (3.9 in)	4 years	48 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 2021

Records set or tied on this calendar date in each year from 1802 to 2021. 2021 had 443 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 2021-05-17: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 50	393
50 to 100	6
100 to 150	1
150 to 200	0
200 to 250	1
250 to 300	1