Weather Records on 17 July 2021

625 weather records were set or tied worldwide on 17 July 2021. Highest significance: Rohwer 2 NNE, US.

Key Facts for 17 July 2021

On 17 July 2021, 625 weather records were set or tied at long-record stations worldwide.
276 were record highs and 58 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 611 daily.
Rohwer 2 NNE set a monthly record daily precipitation of 166.4 mm (6.6 in) on 17 July 2021.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 444 records.

Record Map

625 stations

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

Weather records on 17 July 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Rohwer 2 NNE	United States	Record daily precipitation	166.4 mm (6.6 in)	74 of 100 (Major)
Truro	Australia	Record daily precipitation	36.0 mm (1.4 in)	68 of 100 (Major)
Point Pass	Australia	Record daily precipitation	30.4 mm (1.2 in)	67 of 100 (Major)
Tanunda	Australia	Record daily precipitation	29.6 mm (1.2 in)	62 of 100 (Major)
Dearborn	United States	Record daily precipitation	95.5 mm (3.8 in)	59 of 100 (Notable)
Wirrega (Taunton)	Australia	Record daily precipitation	29.4 mm (1.2 in)	58 of 100 (Notable)
Kelso	United States	Record daily precipitation	164.8 mm (6.5 in)	58 of 100 (Notable)
Grosse Pointe Farms	United States	Record daily precipitation	100.1 mm (3.9 in)	56 of 100 (Notable)
Mount Bryan	Australia	Record daily precipitation	25.0 mm (1.0 in)	55 of 100 (Notable)
Wien	Austria	Record daily precipitation	80.8 mm (3.2 in)	55 of 100 (Notable)
Shijiazhuang	China	Record daily precipitation	129.0 mm (5.1 in)	55 of 100 (Notable)
Hastings	United States	Record daily precipitation	71.1 mm (2.8 in)	53 of 100 (Notable)
Kocevje	Slovenia	Record daily precipitation	63.3 mm (2.5 in)	52 of 100 (Notable)
1 N McLeansboro	United States	Record daily precipitation	57.4 mm (2.3 in)	52 of 100 (Notable)
Spavinaw	United States	Record daily precipitation	143.8 mm (5.7 in)	52 of 100 (Notable)
Show Low AP	United States	Record daily precipitation	52.1 mm (2.1 in)	51 of 100 (Notable)
Batavia	United States	Record daily precipitation	76.2 mm (3.0 in)	51 of 100 (Notable)
Norwalk Wwtp	United States	Record daily precipitation	54.1 mm (2.1 in)	51 of 100 (Notable)
Poronajsk	Russia	Record high minimum temperature	19.2 C (66.6 F)	50 of 100 (Notable)
Crnomelj-Doblice	Slovenia	Record daily precipitation	48.8 mm (1.9 in)	50 of 100 (Notable)
Franklin	United States	Record daily precipitation	67.3 mm (2.6 in)	50 of 100 (Notable)
Cooch Behar	India	Record daily precipitation	201.9 mm (7.9 in)	49 of 100 (Notable)
Madison	United States	Record daily precipitation	45.7 mm (1.8 in)	49 of 100 (Notable)
Louisville McAlpine	United States	Record daily precipitation	62.0 mm (2.4 in)	49 of 100 (Notable)
Niagara Falls Intl AP	United States	Record daily precipitation	59.7 mm (2.4 in)	48 of 100 (Notable)
Rochester Gtr Intl	United States	Record daily precipitation	77.0 mm (3.0 in)	48 of 100 (Notable)
Nairne	Australia	Record daily precipitation	26.4 mm (1.0 in)	47 of 100 (Notable)
Lyndoch	Australia	Record daily precipitation	26.6 mm (1.0 in)	46 of 100 (Notable)
Salzburg	Austria	Record daily precipitation	66.7 mm (2.6 in)	46 of 100 (Notable)
Zugspitze	Germany	Record daily precipitation	75.2 mm (3.0 in)	46 of 100 (Notable)
Kristianstad	Sweden	Record high minimum temperature	19.5 C (67.1 F)	46 of 100 (Notable)
McComb AP	United States	Record daily precipitation	53.3 mm (2.1 in)	46 of 100 (Notable)
Glenwood Spgs #2	United States	Record high minimum temperature	19.4 C (66.9 F)	45 of 100 (Notable)
Hallett (Old Canowie)	Australia	Record daily precipitation	37.0 mm (1.5 in)	44 of 100 (Notable)
Connaught	Ireland	Record high minimum temperature	15.1 C (59.2 F)	44 of 100 (Notable)
Harrisburg	United States	Record daily precipitation	71.1 mm (2.8 in)	44 of 100 (Notable)
Cambridge	United States	Record daily precipitation	87.1 mm (3.4 in)	44 of 100 (Notable)
Paulding	United States	Record daily precipitation	77.0 mm (3.0 in)	44 of 100 (Notable)
Putbus	Germany	Record high minimum temperature	18.7 C (65.7 F)	43 of 100 (Notable)
Bogucany	Russia	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
Dardanelle	United States	Record daily precipitation	39.1 mm (1.5 in)	43 of 100 (Notable)
Warsaw Markland Dam	United States	Record daily precipitation	87.4 mm (3.4 in)	43 of 100 (Notable)
Lichtenhain-Mittelndorf	Germany	Record daily precipitation	78.2 mm (3.1 in)	42 of 100 (Notable)
Rushville	United States	Record daily precipitation	45.7 mm (1.8 in)	42 of 100 (Notable)
Grover Hill	United States	Record daily precipitation	81.3 mm (3.2 in)	42 of 100 (Notable)
Monticello Muni AP	United States	Record daily precipitation	27.2 mm (1.1 in)	42 of 100 (Notable)
Apoinga (Wilivere)	Australia	Record daily precipitation	26.6 mm (1.0 in)	41 of 100 (Notable)
Nobeoka	Japan	Record daily precipitation	191.0 mm (7.5 in)	41 of 100 (Notable)
Wlodawa	Poland	Record daily precipitation	45.0 mm (1.8 in)	41 of 100 (Notable)
Lockport 2SE	United States	Record daily precipitation	66.0 mm (2.6 in)	41 of 100 (Notable)
St Kitts	Australia	Record daily precipitation	27.8 mm (1.1 in)	40 of 100 (Notable)
Eudunda	Australia	Record daily precipitation	29.2 mm (1.1 in)	40 of 100 (Notable)
Townsville Aero	Australia	Record high maximum temperature	30.4 C (86.7 F)	40 of 100 (Notable)
Dublin Phoenix Park	Ireland	Record high maximum temperature	28.0 C (82.4 F)	40 of 100 (Notable)
Gagnoa	Cote D'Ivoire	Record daily precipitation	70.1 mm (2.8 in)	40 of 100 (Notable)
Tobolsk	Russia	Record low minimum temperature	4.9 C (40.8 F)	40 of 100 (Notable)
Holly	United States	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Phila Intl AP	United States	Record daily precipitation	51.1 mm (2.0 in)	40 of 100 (Notable)
Mackay Aero	Australia	Record high maximum temperature	28.3 C (82.9 F)	39 of 100 (Notable)
Buffalo	United States	Record daily precipitation	67.8 mm (2.7 in)	38 of 100 (Notable)

Counts by Type and Timescale

625 records

Records set or tied on 17 July 2021 by type: Highest daily maximum 107, Lowest daily maximum 41, Highest daily minimum 169, Lowest daily minimum 17, Heaviest daily rainfall 291.

Records on 17 July 2021 by type
Record type	Records
Highest daily maximum	107
Lowest daily maximum	41
Highest daily minimum	169
Lowest daily minimum	17
Heaviest daily rainfall	291
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 2021 by timescale: all-time 0, monthly 14, daily 611.

How Much Records Were Beaten By

521 broken records

Margins by which the 521 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 88.6. Ties are not counted.

Top 20 by Significance

17 July 2021

Top 20 records on 17 July 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 2021	Rohwer 2 NNE, US	monthly rain	166.4 mm (6.6 in)	61.2 mm (2.4 in)	60 years	74 of 100 (Major)
17 July 2021	Truro, AU	daily rain	36.0 mm (1.4 in)	14.4 mm (0.6 in)	99 years	68 of 100 (Major)
17 July 2021	Point Pass, AU	daily rain	30.4 mm (1.2 in)	18.5 mm (0.7 in)	64 years	67 of 100 (Major)
17 July 2021	Tanunda, AU	daily rain	29.6 mm (1.2 in)	11.3 mm (0.4 in)	115 years	62 of 100 (Major)
17 July 2021	Dearborn, US	daily rain	95.5 mm (3.8 in)	66.3 mm (2.6 in)	40 years	59 of 100 (Notable)
17 July 2021	Wirrega (Taunton), AU	daily rain	29.4 mm (1.2 in)	8.1 mm (0.32 in)	99 years	58 of 100 (Notable)
17 July 2021	Kelso, US	monthly rain	164.8 mm (6.5 in)	63.2 mm (2.5 in)	32 years	58 of 100 (Notable)
17 July 2021	Grosse Pointe Farms, US	daily rain	100.1 mm (3.9 in)	54.4 mm (2.1 in)	32 years	56 of 100 (Notable)
17 July 2021	Mount Bryan, AU	daily rain	25.0 mm (1.0 in)	7.2 mm (0.28 in)	115 years	55 of 100 (Notable)
17 July 2021	Wien, AT	monthly rain	80.8 mm (3.2 in)	6.8 mm (0.27 in)	95 years	55 of 100 (Notable)
17 July 2021	Shijiazhuang, CN	daily rain	129.0 mm (5.1 in)	88.6 mm (3.5 in)	30 years	55 of 100 (Notable)
17 July 2021	Hastings, US	daily rain	71.1 mm (2.8 in)	38.1 mm (1.5 in)	39 years	53 of 100 (Notable)
17 July 2021	Kocevje, SI	daily rain	63.3 mm (2.5 in)	41.3 mm (1.6 in)	52 years	52 of 100 (Notable)
17 July 2021	1 N McLeansboro, US	daily rain	57.4 mm (2.3 in)	23.9 mm (0.9 in)	84 years	52 of 100 (Notable)
17 July 2021	Spavinaw, US	monthly rain	143.8 mm (5.7 in)	27.2 mm (1.1 in)	63 years	52 of 100 (Notable)
17 July 2021	Show Low AP, US	daily rain	52.1 mm (2.1 in)	24.2 mm (1.0 in)	36 years	51 of 100 (Notable)
17 July 2021	Batavia, US	monthly rain	76.2 mm (3.0 in)	1.3 mm (0.05 in)	101 years	51 of 100 (Notable)
17 July 2021	Norwalk Wwtp, US	daily rain	54.1 mm (2.1 in)	17.3 mm (0.7 in)	122 years	51 of 100 (Notable)
17 July 2021	Poronajsk, RU	monthly high min	19.2 C (66.6 F)	0.1 C (0.2 F)	100 years	50 of 100 (Notable)
17 July 2021	Crnomelj-Doblice, SI	daily rain	48.8 mm (1.9 in)	43.0 mm (1.7 in)	31 years	50 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

1793 to 2021

Records set or tied on this calendar date in each year from 1793 to 2021. 2021 had 625 records.

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

Records on 07-17 in each year
Year	Records
1793	1
1798	1
1799	1
1801	2
1802	1
1821	1
1827	1
1833	1
1840	1
1842	1
1845	2
1852	1
1862	1
1863	1
1865	2
1866	1
1871	1
1874	1
1875	2
1877	1
1880	1
1881	2
1882	2
1883	5
1884	1
1887	1
1888	2
1889	4
1890	4
1892	5
1893	3
1894	4
1895	1
1896	3
1897	1
1898	2
1899	4
1900	4
1901	6
1902	6
1903	13
1904	4
1905	9
1906	13
1907	12
1908	32
1909	16
1910	8
1911	52
1912	13
1913	26
1914	67
1915	71
1916	27
1917	62
1918	41
1919	45
1920	50
1921	120
1922	206
1923	105
1924	165
1925	275
1926	251
1927	118
1928	116
1929	154
1930	366
1931	492
1932	293
1933	216
1934	438
1935	245
1936	815
1937	313
1938	303
1939	540
1940	319
1941	386
1942	522
1943	321
1944	236
1945	681
1946	523
1947	505
1948	278
1949	405
1950	645
1951	356
1952	772
1953	557
1954	517
1955	512
1956	608
1957	298
1958	693
1959	631
1960	324
1961	408
1962	421
1963	223
1964	481
1965	753
1966	454
1967	965
1968	707
1969	741
1970	486
1971	790
1972	634
1973	680
1974	691
1975	775
1976	1,041
1977	764
1978	794
1979	642
1980	1,137
1981	628
1982	850
1983	1,120
1984	875
1985	483
1986	1,214
1987	1,388
1988	1,239
1989	1,289
1990	953
1991	763
1992	1,055
1993	956
1994	631
1995	917
1996	911
1997	816
1998	1,031
1999	925
2000	1,166
2001	916
2002	995
2003	1,396
2004	908
2005	1,184
2006	1,509
2007	1,218
2008	508
2009	1,218
2010	965
2011	1,101
2012	934
2013	819
2014	1,456
2015	831
2016	679
2017	398
2018	750
2019	477
2020	515
2021	625
2022	791
2023	1,060
2024	814
2025	966
2026	860

Download the Data

Data for records on 2021-07-17: 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 20	486
20 to 40	21
40 to 60	8
60 to 80	5
80 to 100	1