Weather Records on 17 July 1977

764 weather records were set or tied worldwide on 17 July 1977. Highest significance: Acude Bonito, BR.

Key Facts for 17 July 1977

On 17 July 1977, 764 weather records were set or tied at long-record stations worldwide.
423 were record highs and 159 were record lows, counting maximum and minimum temperature.
By timescale, 9 were all-time records, 17 monthly and 738 daily.
Acude Bonito set a daily record precipitation of 37.0 mm (1.5 in) on 17 July 1977.
Across 163 earlier years (1793 to 2026) the same calendar date averaged 443 records.

Record Map

764 stations

764 station records on 17 July 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 July 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Acude Bonito	Brazil	Record daily precipitation	37.0 mm (1.5 in)	59 of 100 (Notable)
Corner Brook	Canada	Record daily precipitation	41.1 mm (1.6 in)	51 of 100 (Notable)
Kemptville	Canada	Record daily precipitation	56.2 mm (2.2 in)	49 of 100 (Notable)
Spring Grove	United States	Record daily precipitation	76.2 mm (3.0 in)	47 of 100 (Notable)
Ipueiras	Brazil	Record daily precipitation	36.4 mm (1.4 in)	46 of 100 (Notable)
Itapage	Brazil	Record daily precipitation	31.5 mm (1.2 in)	46 of 100 (Notable)
Sao Goncalo Do Amarante	Brazil	Record daily precipitation	43.6 mm (1.7 in)	45 of 100 (Notable)
Nicosia	Cyprus	Record high minimum temperature	27.5 C (81.5 F)	44 of 100 (Notable)
Columbus	United States	Record daily precipitation	73.4 mm (2.9 in)	44 of 100 (Notable)
Reriutaba	Brazil	Record daily precipitation	33.0 mm (1.3 in)	43 of 100 (Notable)
Jungapeo	Mexico	Record daily precipitation	63.0 mm (2.5 in)	43 of 100 (Notable)
Sibley	United States	Record daily precipitation	48.5 mm (1.9 in)	43 of 100 (Notable)
Sosnovo-Ozerskoe	Russia	Record high minimum temperature	19.8 C (67.6 F)	42 of 100 (Notable)
Pickle Lake (Aut)	Canada	Record daily precipitation	55.8 mm (2.2 in)	41 of 100 (Notable)
Sveg	Sweden	Record low maximum temperature	9.4 C (48.9 F)	40 of 100 (Notable)
Glenham	United States	Record daily precipitation	50.0 mm (2.0 in)	40 of 100 (Notable)
Caucaia	Brazil	Record daily precipitation	43.0 mm (1.7 in)	39 of 100 (Notable)
Hilok	Russia	Record high maximum temperature	38.9 C (102.0 F)	39 of 100 (Notable)
Monterey	United States	Record high maximum temperature	32.2 C (90.0 F)	39 of 100 (Notable)
Sosnovo-Ozerskoe	Russia	Record high maximum temperature	37.3 C (99.1 F)	38 of 100 (Notable)
Palkem	Sweden	Record daily precipitation	35.3 mm (1.4 in)	38 of 100 (Notable)
Cakir	Russia	Record high minimum temperature	19.8 C (67.6 F)	37 of 100 (Notable)
Urjupinsk	Russia	Record daily precipitation	27.4 mm (1.1 in)	37 of 100 (Notable)
Fredericksburg Np	United States	Record high maximum temperature	39.4 C (102.9 F)	37 of 100 (Notable)
Hot Springs	United States	Record high maximum temperature	35.0 C (95.0 F)	37 of 100 (Notable)
Chapulco	Mexico	Record high minimum temperature	17.2 C (63.0 F)	36 of 100 (Notable)
Harlan	United States	Record daily precipitation	69.1 mm (2.7 in)	36 of 100 (Notable)
Lumpkin 2 SE	United States	Record high maximum temperature	38.3 C (100.9 F)	35 of 100 (Notable)
Vanceburg	United States	Record high maximum temperature	36.7 C (98.1 F)	35 of 100 (Notable)
Carmel	United States	Record high maximum temperature	35.6 C (96.1 F)	35 of 100 (Notable)
Forest Grove	Australia	Record daily precipitation	67.4 mm (2.7 in)	34 of 100 (Routine)
Timbauba	Brazil	Record daily precipitation	45.4 mm (1.8 in)	34 of 100 (Routine)
Vladikavkaz	Russia	Record daily precipitation	34.0 mm (1.3 in)	34 of 100 (Routine)
Ballastviken	Sweden	Record daily precipitation	35.0 mm (1.4 in)	34 of 100 (Routine)
Jokkmokk	Sweden	Record low maximum temperature	9.4 C (48.9 F)	34 of 100 (Routine)
Odesa	Ukraine	Record low minimum temperature	11.5 C (52.7 F)	34 of 100 (Routine)
Nevada City	United States	Record high minimum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Galena	United States	Record daily precipitation	57.7 mm (2.3 in)	34 of 100 (Routine)
Deseret	United States	Record high maximum temperature	38.9 C (102.0 F)	34 of 100 (Routine)
Madison 3NNW	United States	Record high maximum temperature	36.7 C (98.1 F)	34 of 100 (Routine)
Baltimore Customs House	United States	Record high maximum temperature	38.3 C (100.9 F)	34 of 100 (Routine)
Elkhart	United States	Record high minimum temperature	25.0 C (77.0 F)	33 of 100 (Routine)
Wibaux 2 E	United States	Record high maximum temperature	42.2 C (108.0 F)	33 of 100 (Routine)
Mt Airy 2 W	United States	Record high maximum temperature	36.7 C (98.1 F)	33 of 100 (Routine)
Ubiracu	Brazil	Record daily precipitation	26.1 mm (1.0 in)	32 of 100 (Routine)
Romanovka	Russia	Record high minimum temperature	19.0 C (66.2 F)	32 of 100 (Routine)
Odesa	Ukraine	Record low maximum temperature	20.1 C (68.2 F)	32 of 100 (Routine)
Milford 2 SE	United States	Record high maximum temperature	37.8 C (100.0 F)	32 of 100 (Routine)
Grant City	United States	Record high minimum temperature	24.4 C (75.9 F)	32 of 100 (Routine)
Gettysburg	United States	Record high maximum temperature	36.1 C (97.0 F)	32 of 100 (Routine)
Woodstock 2 NE	United States	Record high maximum temperature	39.4 C (102.9 F)	32 of 100 (Routine)
Brodhead Wwtp	United States	Record daily precipitation	45.0 mm (1.8 in)	32 of 100 (Routine)
Uruburetama	Brazil	Record daily precipitation	40.4 mm (1.6 in)	31 of 100 (Routine)
Morrisburg	Canada	Record daily precipitation	45.2 mm (1.8 in)	31 of 100 (Routine)
Tambov	Russia	Record daily precipitation	31.1 mm (1.2 in)	31 of 100 (Routine)
Kursk	Russia	Record low minimum temperature	7.5 C (45.5 F)	31 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	25.3 mm (1.0 in)	31 of 100 (Routine)
Askaniia Nova	Ukraine	Record low maximum temperature	22.9 C (73.2 F)	31 of 100 (Routine)
Ai-Petri	Ukraine	Record low minimum temperature	5.6 C (42.1 F)	31 of 100 (Routine)
Meade	United States	Record high minimum temperature	23.9 C (75.0 F)	31 of 100 (Routine)

Counts by Type and Timescale

764 records

Records set or tied on 17 July 1977 by type: Highest daily maximum 239, Lowest daily maximum 84, Highest daily minimum 184, Lowest daily minimum 75, Heaviest daily rainfall 182.

Records on 17 July 1977 by type
Record type	Records
Highest daily maximum	239
Lowest daily maximum	84
Highest daily minimum	184
Lowest daily minimum	75
Heaviest daily rainfall	182
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 July 1977 by timescale: all-time 9, monthly 17, daily 738.

How Much Records Were Beaten By

558 broken records

Margins by which the 558 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 49.5. Ties are not counted.

Top 20 by Significance

17 July 1977

Top 20 records on 17 July 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 July 1977	Acude Bonito, BR	daily rain	37.0 mm (1.5 in)	35.4 mm (1.4 in)	56 years	59 of 100 (Notable)
17 July 1977	Corner Brook, CA	daily rain	41.1 mm (1.6 in)	26.4 mm (1.0 in)	27 years	51 of 100 (Notable)
17 July 1977	Kemptville, CA	daily rain	56.2 mm (2.2 in)	46.0 mm (1.8 in)	14 years	49 of 100 (Notable)
17 July 1977	Spring Grove, US	daily rain	76.2 mm (3.0 in)	49.5 mm (1.9 in)	38 years	47 of 100 (Notable)
17 July 1977	Ipueiras, BR	daily rain	36.4 mm (1.4 in)	32.4 mm (1.3 in)	2 years	46 of 100 (Notable)
17 July 1977	Itapage, BR	daily rain	31.5 mm (1.2 in)	24.0 mm (0.9 in)	2 years	46 of 100 (Notable)
17 July 1977	Sao Goncalo Do Amarante, BR	daily rain	43.6 mm (1.7 in)	29.6 mm (1.2 in)	38 years	45 of 100 (Notable)
17 July 1977	Nicosia, CY	monthly high min	27.5 C (81.5 F)	0.6 C (1.1 F)	80 years	44 of 100 (Notable)
17 July 1977	Columbus, US	daily rain	73.4 mm (2.9 in)	20.8 mm (0.8 in)	67 years	44 of 100 (Notable)
17 July 1977	Reriutaba, BR	daily rain	33.0 mm (1.3 in)	30.7 mm (1.2 in)	2 years	43 of 100 (Notable)
17 July 1977	Jungapeo, MX	daily rain	63.0 mm (2.5 in)	38.6 mm (1.5 in)	3 years	43 of 100 (Notable)
17 July 1977	Sibley, US	daily rain	48.5 mm (1.9 in)	17.5 mm (0.7 in)	74 years	43 of 100 (Notable)
17 July 1977	Sosnovo-Ozerskoe, RU	all-time high min	19.8 C (67.6 F)	1.9 C (3.4 F)	40 years	42 of 100 (Notable)
17 July 1977	Pickle Lake (Aut), CA	daily rain	55.8 mm (2.2 in)	32.7 mm (1.3 in)	11 years	41 of 100 (Notable)
17 July 1977	Sveg, SE	monthly low max	9.4 C (48.9 F)	0.1 C (0.2 F)	71 years	40 of 100 (Notable)
17 July 1977	Glenham, US	daily rain	50.0 mm (2.0 in)	37.3 mm (1.5 in)	36 years	40 of 100 (Notable)
17 July 1977	Caucaia, BR	daily rain	43.0 mm (1.7 in)	26.6 mm (1.0 in)	40 years	39 of 100 (Notable)
17 July 1977	Hilok, RU	all-time high max	38.9 C (102.0 F)	1.4 C (2.5 F)	40 years	39 of 100 (Notable)
17 July 1977	Monterey, US	daily high max	32.2 C (90.0 F)	2.2 C (4.0 F)	81 years	39 of 100 (Notable)
17 July 1977	Sosnovo-Ozerskoe, RU	all-time high max	37.3 C (99.1 F)	1.0 C (1.8 F)	41 years	38 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 1977

Records set or tied on this calendar date in each year from 1793 to 1977. 1977 had 764 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 1977-07-17: 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).

Histogram of margins by which records were beaten on 17 July 1977
Margin	Records
0 to 10	504
10 to 20	33
20 to 30	12
30 to 40	7
40 to 50	2