Weather Records on 17 August 1956

407 weather records were set or tied worldwide on 17 August 1956. Highest significance: Hakalau 142, US.

Key Facts for 17 August 1956

On 17 August 1956, 407 weather records were set or tied at long-record stations worldwide.
148 were record highs and 97 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 6 monthly and 395 daily.
Hakalau 142 set a daily record precipitation of 157.5 mm (6.2 in) on 17 August 1956.
Across 162 earlier years (1797 to 2026) the same calendar date averaged 474 records.

Record Map

407 stations

407 station records on 17 August 1956 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 August 1956: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hakalau 142	United States	Record daily precipitation	157.5 mm (6.2 in)	57 of 100 (Notable)
Hilo 86A	United States	Record daily precipitation	168.4 mm (6.6 in)	57 of 100 (Notable)
Poco Das Trincheiras	Brazil	Record daily precipitation	48.9 mm (1.9 in)	52 of 100 (Notable)
Honomu Makai 143	United States	Record daily precipitation	117.3 mm (4.6 in)	50 of 100 (Notable)
Taipu	Brazil	Record daily precipitation	60.3 mm (2.4 in)	49 of 100 (Notable)
Macaiba	Brazil	Record daily precipitation	74.0 mm (2.9 in)	49 of 100 (Notable)
Honohina 137	United States	Record daily precipitation	181.1 mm (7.1 in)	49 of 100 (Notable)
Dumka	India	Record daily precipitation	137.9 mm (5.4 in)	46 of 100 (Notable)
Honomu Mauka 138	United States	Record daily precipitation	205.7 mm (8.1 in)	46 of 100 (Notable)
Yates Ctr	United States	Record high minimum temperature	28.9 C (84.0 F)	44 of 100 (Notable)
Ft Pierce	United States	Record low minimum temperature	16.7 C (62.1 F)	43 of 100 (Notable)
Hattin	India	Record daily precipitation	101.9 mm (4.0 in)	42 of 100 (Notable)
Rapelje	United States	Record daily precipitation	26.4 mm (1.0 in)	40 of 100 (Notable)
Krishnanagar	India	Record daily precipitation	101.6 mm (4.0 in)	37 of 100 (Notable)
Ravenna	United States	Record daily precipitation	32.3 mm (1.3 in)	37 of 100 (Notable)
Papaikou 144.1	United States	Record daily precipitation	122.7 mm (4.8 in)	37 of 100 (Notable)
Hambantota	Sri Lanka	Record low maximum temperature	26.9 C (80.4 F)	36 of 100 (Notable)
Haina 214	United States	Record daily precipitation	69.9 mm (2.8 in)	36 of 100 (Notable)
Paauilo 221	United States	Record daily precipitation	117.6 mm (4.6 in)	36 of 100 (Notable)
Mtn View 91	United States	Record daily precipitation	159.5 mm (6.3 in)	35 of 100 (Notable)
Dalu	India	Record daily precipitation	240.3 mm (9.5 in)	34 of 100 (Routine)
Waramain	India	Record daily precipitation	147.3 mm (5.8 in)	33 of 100 (Routine)
Jalalabad	India	Record daily precipitation	83.1 mm (3.3 in)	33 of 100 (Routine)
New Bern 3 NW	United States	Record low minimum temperature	16.1 C (61.0 F)	33 of 100 (Routine)
Vestervig	Denmark	Record low minimum temperature	7.1 C (44.8 F)	32 of 100 (Routine)
Globe Rs	United States	Record daily precipitation	25.4 mm (1.0 in)	32 of 100 (Routine)
Olaa 92	United States	Record daily precipitation	101.6 mm (4.0 in)	32 of 100 (Routine)
Burdwan	India	Record daily precipitation	115.1 mm (4.5 in)	30 of 100 (Routine)
Allakaket	United States	Record high minimum temperature	15.0 C (59.0 F)	30 of 100 (Routine)
Cotija	Mexico	Record daily precipitation	37.8 mm (1.5 in)	29 of 100 (Routine)
Purcell 2 SW	United States	Record high maximum temperature	42.8 C (109.0 F)	29 of 100 (Routine)
Brooks 1	Canada	Record low maximum temperature	10.0 C (50.0 F)	28 of 100 (Routine)
Upper Shillong	India	Record daily precipitation	72.1 mm (2.8 in)	28 of 100 (Routine)
Sherman	United States	Record high maximum temperature	42.8 C (109.0 F)	28 of 100 (Routine)
Kukuihaele Mill 206	United States	Record daily precipitation	68.1 mm (2.7 in)	28 of 100 (Routine)
Blackwell 1 W	United States	Record high minimum temperature	30.0 C (86.0 F)	27 of 100 (Routine)
Chaplin	Canada	Record low maximum temperature	13.9 C (57.0 F)	26 of 100 (Routine)
Cherrapunji	India	Record daily precipitation	212.3 mm (8.4 in)	26 of 100 (Routine)
Rajakhera	India	Record daily precipitation	99.1 mm (3.9 in)	26 of 100 (Routine)
Honokane 181.1	United States	Record daily precipitation	80.3 mm (3.2 in)	26 of 100 (Routine)
Thief River Falls	United States	Record daily precipitation	31.2 mm (1.2 in)	25 of 100 (Routine)
Riverton	United States	Record high minimum temperature	15.0 C (59.0 F)	25 of 100 (Routine)
Havre Wb City	United States	Record low maximum temperature	15.0 C (59.0 F)	25 of 100 (Routine)
Cut Bank AP	United States	Record low maximum temperature	11.1 C (52.0 F)	25 of 100 (Routine)
High River	Canada	Record low maximum temperature	10.6 C (51.1 F)	24 of 100 (Routine)
Leader	Canada	Record low maximum temperature	11.1 C (52.0 F)	24 of 100 (Routine)
Agartala	India	Record daily precipitation	102.4 mm (4.0 in)	24 of 100 (Routine)
Gangarampur	India	Record daily precipitation	45.7 mm (1.8 in)	24 of 100 (Routine)
Pinos Altos	United States	Record daily precipitation	28.4 mm (1.1 in)	24 of 100 (Routine)
Waukomis	United States	Record high minimum temperature	27.8 C (82.0 F)	24 of 100 (Routine)
Kohala 179.1	United States	Record daily precipitation	50.0 mm (2.0 in)	24 of 100 (Routine)
Calgary Int'l A	Canada	Record low maximum temperature	9.4 C (48.9 F)	23 of 100 (Routine)
Carway	Canada	Record low maximum temperature	9.4 C (48.9 F)	23 of 100 (Routine)
Pekisko	Canada	Record low maximum temperature	10.0 C (50.0 F)	23 of 100 (Routine)
Thetford Mines	Canada	Record daily precipitation	31.5 mm (1.2 in)	23 of 100 (Routine)
Suratgarh	India	Record daily precipitation	31.8 mm (1.3 in)	23 of 100 (Routine)
Saint Paul	United States	Record daily precipitation	46.7 mm (1.8 in)	23 of 100 (Routine)
Bowie	United States	Record high minimum temperature	25.0 C (77.0 F)	23 of 100 (Routine)
Saint Paul Is AP	United States	Record low minimum temperature	0.0 C (32.0 F)	23 of 100 (Routine)
Three Hills	Canada	Record low maximum temperature	12.8 C (55.0 F)	22 of 100 (Routine)

Counts by Type and Timescale

407 records

Records set or tied on 17 August 1956 by type: Highest daily maximum 71, Lowest daily maximum 67, Highest daily minimum 77, Lowest daily minimum 30, Heaviest daily rainfall 162.

Records on 17 August 1956 by type
Record type	Records
Highest daily maximum	71
Lowest daily maximum	67
Highest daily minimum	77
Lowest daily minimum	30
Heaviest daily rainfall	162
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 August 1956 by timescale: all-time 6, monthly 6, daily 395.

How Much Records Were Beaten By

295 broken records

Margins by which the 295 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 91.9. Ties are not counted.

Top 20 by Significance

17 August 1956

Top 20 records on 17 August 1956 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 August 1956	Hakalau 142, US	daily rain	157.5 mm (6.2 in)	91.5 mm (3.6 in)	42 years	57 of 100 (Notable)
17 August 1956	Hilo 86A, US	daily rain	168.4 mm (6.6 in)	91.9 mm (3.6 in)	42 years	57 of 100 (Notable)
17 August 1956	Poco Das Trincheiras, BR	daily rain	48.9 mm (1.9 in)	34.3 mm (1.4 in)	32 years	52 of 100 (Notable)
17 August 1956	Honomu Makai 143, US	daily rain	117.3 mm (4.6 in)	83.5 mm (3.3 in)	24 years	50 of 100 (Notable)
17 August 1956	Taipu, BR	daily rain	60.3 mm (2.4 in)	53.2 mm (2.1 in)	17 years	49 of 100 (Notable)
17 August 1956	Macaiba, BR	daily rain	74.0 mm (2.9 in)	50.5 mm (2.0 in)	17 years	49 of 100 (Notable)
17 August 1956	Honohina 137, US	daily rain	181.1 mm (7.1 in)	64.5 mm (2.5 in)	42 years	49 of 100 (Notable)
17 August 1956	Dumka, IN	daily rain	137.9 mm (5.4 in)	69.3 mm (2.7 in)	15 years	46 of 100 (Notable)
17 August 1956	Honomu Mauka 138, US	daily rain	205.7 mm (8.1 in)	77.9 mm (3.1 in)	42 years	46 of 100 (Notable)
17 August 1956	Yates Ctr, US	all-time high min	28.9 C (84.0 F)	1.1 C (2.0 F)	50 years	44 of 100 (Notable)
17 August 1956	Ft Pierce, US	monthly low min	16.7 C (62.1 F)	2.2 C (4.0 F)	48 years	43 of 100 (Notable)
17 August 1956	Hattin, IN	daily rain	101.9 mm (4.0 in)	56.2 mm (2.2 in)	29 years	42 of 100 (Notable)
17 August 1956	Rapelje, US	daily rain	26.4 mm (1.0 in)	17.8 mm (0.7 in)	30 years	40 of 100 (Notable)
17 August 1956	Krishnanagar, IN	daily rain	101.6 mm (4.0 in)	41.1 mm (1.6 in)	35 years	37 of 100 (Notable)
17 August 1956	Ravenna, US	daily rain	32.3 mm (1.3 in)	21.9 mm (0.9 in)	40 years	37 of 100 (Notable)
17 August 1956	Papaikou 144.1, US	daily rain	122.7 mm (4.8 in)	43.2 mm (1.7 in)	42 years	37 of 100 (Notable)
17 August 1956	Hambantota, LK	daily low max	26.9 C (80.4 F)	0.9 C (1.6 F)	81 years	36 of 100 (Notable)
17 August 1956	Haina 214, US	daily rain	69.9 mm (2.8 in)	30.8 mm (1.2 in)	38 years	36 of 100 (Notable)
17 August 1956	Paauilo 221, US	daily rain	117.6 mm (4.6 in)	52.8 mm (2.1 in)	33 years	36 of 100 (Notable)
17 August 1956	Mtn View 91, US	daily rain	159.5 mm (6.3 in)	47.2 mm (1.9 in)	38 years	35 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

1797 to 1956

Records set or tied on this calendar date in each year from 1797 to 1956. 1956 had 407 records.

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

Records on 08-17 in each year
Year	Records
1797	2
1802	2
1820	2
1837	1
1838	2
1841	2
1842	1
1845	2
1853	1
1854	1
1856	1
1857	1
1861	3
1862	1
1867	1
1868	3
1869	1
1872	1
1875	2
1876	5
1879	1
1881	1
1882	1
1883	2
1885	3
1886	1
1888	5
1891	1
1892	3
1893	2
1894	3
1895	2
1896	3
1897	1
1898	5
1899	8
1900	3
1901	14
1902	7
1903	6
1904	2
1905	11
1906	28
1907	9
1908	26
1909	24
1910	17
1911	18
1912	31
1913	79
1914	41
1915	28
1916	33
1917	35
1918	112
1919	37
1920	110
1921	37
1922	169
1923	161
1924	171
1925	130
1926	182
1927	228
1928	131
1929	243
1930	138
1931	302
1932	360
1933	260
1934	377
1935	437
1936	670
1937	726
1938	466
1939	364
1940	341
1941	378
1942	461
1943	743
1944	531
1945	387
1946	433
1947	682
1948	475
1949	371
1950	522
1951	413
1952	470
1953	345
1954	685
1955	465
1956	407
1957	504
1958	519
1959	543
1960	533
1961	998
1962	445
1963	650
1964	410
1965	641
1966	496
1967	679
1968	953
1969	593
1970	467
1971	447
1972	1,044
1973	750
1974	582
1975	612
1976	797
1977	1,216
1978	814
1979	1,464
1980	895
1981	1,112
1982	554
1983	1,574
1984	726
1985	948
1986	916
1987	1,150
1988	1,608
1989	687
1990	949
1991	560
1992	1,813
1993	803
1994	1,038
1995	1,724
1996	752
1997	1,544
1998	1,003
1999	697
2000	994
2001	1,101
2002	1,266
2003	948
2004	1,046
2005	722
2006	814
2007	1,646
2008	1,301
2009	922
2010	1,105
2011	956
2012	1,215
2013	802
2014	997
2015	890
2016	748
2017	544
2018	518
2019	467
2020	1,529
2021	800
2022	1,428
2023	1,032
2024	740
2025	538
2026	535

Download the Data

Data for records on 1956-08-17: 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	263
20 to 40	13
40 to 60	11
60 to 80	5
80 to 100	3