Weather Records on 17 September 1977

641 weather records were set or tied worldwide on 17 September 1977. Highest significance: Dontsa, ZA.

Key Facts for 17 September 1977

On 17 September 1977, 641 weather records were set or tied at long-record stations worldwide.
137 were record highs and 254 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 10 monthly and 631 daily.
Dontsa set a daily record precipitation of 45.0 mm (1.8 in) on 17 September 1977.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 421 records.

Record Map

641 stations

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

Weather records on 17 September 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dontsa	South Africa	Record daily precipitation	45.0 mm (1.8 in)	60 of 100 (Major)
Redding Fire STN 2	United States	Record daily precipitation	82.3 mm (3.2 in)	56 of 100 (Notable)
Mobridge 2NNW	United States	Record daily precipitation	57.2 mm (2.3 in)	55 of 100 (Notable)
Davis 2 WSW Exp Farm	United States	Record low maximum temperature	14.4 C (57.9 F)	48 of 100 (Notable)
Bodocongo	Brazil	Record daily precipitation	43.4 mm (1.7 in)	47 of 100 (Notable)
Seymour (Mag)	South Africa	Record daily precipitation	40.0 mm (1.6 in)	47 of 100 (Notable)
Nququ (Bos)	South Africa	Record daily precipitation	91.7 mm (3.6 in)	46 of 100 (Notable)
Eureka	United States	Record daily snowfall	6.4 cm (2.5 in)	46 of 100 (Notable)
Jungapeo	Mexico	Record high maximum temperature	37.8 C (100.0 F)	45 of 100 (Notable)
Bikaner	India	Record daily precipitation	80.0 mm (3.1 in)	43 of 100 (Notable)
Franklinville	United States	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
Stockton Fire STN 4	United States	Record low maximum temperature	16.1 C (61.0 F)	42 of 100 (Notable)
Ripon 5 NE	United States	Record daily precipitation	45.7 mm (1.8 in)	39 of 100 (Notable)
Crete 4ESE	United States	Record daily precipitation	34.3 mm (1.4 in)	38 of 100 (Notable)
New Berlin	United States	Record daily precipitation	40.6 mm (1.6 in)	38 of 100 (Notable)
Adiake	Cote D'Ivoire	Record daily precipitation	55.2 mm (2.2 in)	37 of 100 (Notable)
Willow Sprg Radio Kuku	United States	Record high minimum temperature	23.3 C (73.9 F)	37 of 100 (Notable)
Wasta	United States	Record daily precipitation	28.7 mm (1.1 in)	37 of 100 (Notable)
Thomas River (Pol)	South Africa	Record daily precipitation	30.0 mm (1.2 in)	36 of 100 (Notable)
Visby_Flygplats	Sweden	Record low maximum temperature	9.0 C (48.2 F)	36 of 100 (Notable)
Liberty 1 NE	United States	Record daily precipitation	39.4 mm (1.6 in)	35 of 100 (Notable)
Jonkoping	Sweden	Record low maximum temperature	10.3 C (50.5 F)	34 of 100 (Routine)
Vanceburg	United States	Record high minimum temperature	19.4 C (66.9 F)	34 of 100 (Routine)
Chemung	United States	Record daily precipitation	41.9 mm (1.6 in)	34 of 100 (Routine)
Monterey	United States	Record high minimum temperature	15.6 C (60.1 F)	34 of 100 (Routine)
Muscoda	United States	Record daily precipitation	25.4 mm (1.0 in)	34 of 100 (Routine)
Baia Mare	Romania	Record low minimum temperature	2.9 C (37.2 F)	33 of 100 (Routine)
Edenburg (Pol)	South Africa	Record daily precipitation	26.5 mm (1.0 in)	33 of 100 (Routine)
Waren	Germany	Record low maximum temperature	12.4 C (54.3 F)	32 of 100 (Routine)
Kazalinsk	Kazakhstan	Record high minimum temperature	19.7 C (67.5 F)	32 of 100 (Routine)
Jimenez (Smn)	Mexico	Record high minimum temperature	18.9 C (66.0 F)	32 of 100 (Routine)
Exwell Park	South Africa	Record daily precipitation	27.0 mm (1.1 in)	32 of 100 (Routine)
Mecca Fire STN	United States	Record low minimum temperature	10.6 C (51.1 F)	32 of 100 (Routine)
Pocomoke City	United States	Record high minimum temperature	21.7 C (71.1 F)	32 of 100 (Routine)
Windham 3 E	United States	Record daily precipitation	32.0 mm (1.3 in)	32 of 100 (Routine)
Vastervik	Sweden	Record low maximum temperature	10.0 C (50.0 F)	31 of 100 (Routine)
Cortland	United States	Record daily precipitation	45.2 mm (1.8 in)	31 of 100 (Routine)
Creston	United States	Record daily precipitation	48.3 mm (1.9 in)	31 of 100 (Routine)
Schierke	Germany	Record low maximum temperature	9.1 C (48.4 F)	30 of 100 (Routine)
De Sabla	United States	Record daily precipitation	30.5 mm (1.2 in)	30 of 100 (Routine)
W Liberty 3NW	United States	Record high minimum temperature	18.3 C (64.9 F)	30 of 100 (Routine)
Bar Harbor 3 NW	United States	Record daily precipitation	49.8 mm (2.0 in)	30 of 100 (Routine)
Cincinnatus	United States	Record daily precipitation	43.2 mm (1.7 in)	30 of 100 (Routine)
De Rust (Pol)	South Africa	Record daily precipitation	25.0 mm (1.0 in)	29 of 100 (Routine)
Ellesmere	South Africa	Record daily precipitation	27.0 mm (1.1 in)	29 of 100 (Routine)
Trompsburg (Pol)	South Africa	Record daily precipitation	27.5 mm (1.1 in)	29 of 100 (Routine)
Greenville	United States	Record daily precipitation	39.6 mm (1.6 in)	29 of 100 (Routine)
Hanford 1 S	United States	Record low minimum temperature	7.2 C (45.0 F)	29 of 100 (Routine)
Pit Rvr Ph 5	United States	Record daily precipitation	68.3 mm (2.7 in)	29 of 100 (Routine)
Indianola 1SW	United States	Record daily precipitation	31.2 mm (1.2 in)	29 of 100 (Routine)
Canastota	United States	Record daily precipitation	36.3 mm (1.4 in)	29 of 100 (Routine)
Rockdale	United States	Record daily precipitation	36.6 mm (1.4 in)	29 of 100 (Routine)
Tasiilaq	Greenland [Denmark]	Record daily precipitation	26.9 mm (1.1 in)	28 of 100 (Routine)
Mazapa	Mexico	Record high minimum temperature	12.8 C (55.0 F)	28 of 100 (Routine)
Auburn	United States	Record low maximum temperature	15.0 C (59.0 F)	28 of 100 (Routine)
Brush Creek Rs	United States	Record daily precipitation	33.0 mm (1.3 in)	28 of 100 (Routine)
Hanford 1 S	United States	Record low maximum temperature	22.8 C (73.0 F)	28 of 100 (Routine)
Nevada City	United States	Record low maximum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Eastland	United States	Record high minimum temperature	23.3 C (73.9 F)	28 of 100 (Routine)
Memphis	United States	Record high minimum temperature	22.2 C (72.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

641 records

Records set or tied on 17 September 1977 by type: Highest daily maximum 40, Lowest daily maximum 174, Highest daily minimum 97, Lowest daily minimum 80, Heaviest daily rainfall 247, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 17 September 1977 by type
Record type	Records
Highest daily maximum	40
Lowest daily maximum	174
Highest daily minimum	97
Lowest daily minimum	80
Heaviest daily rainfall	247
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 17 September 1977 by timescale: all-time 0, monthly 10, daily 631.

How Much Records Were Beaten By

523 broken records

Margins by which the 523 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.3. Ties are not counted.

Top 20 by Significance

17 September 1977

Top 20 records on 17 September 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1977	Dontsa, ZA	daily rain	45.0 mm (1.8 in)	35.1 mm (1.4 in)	75 years	60 of 100 (Major)
17 September 1977	Redding Fire STN 2, US	daily rain	82.3 mm (3.2 in)	68.3 mm (2.7 in)	28 years	56 of 100 (Notable)
17 September 1977	Mobridge 2NNW, US	daily rain	57.2 mm (2.3 in)	41.5 mm (1.6 in)	31 years	55 of 100 (Notable)
17 September 1977	Davis 2 WSW Exp Farm, US	monthly low max	14.4 C (57.9 F)	2.8 C (5.0 F)	82 years	48 of 100 (Notable)
17 September 1977	Bodocongo, BR	monthly rain	43.4 mm (1.7 in)	18.2 mm (0.7 in)	3 years	47 of 100 (Notable)
17 September 1977	Seymour (Mag), ZA	daily rain	40.0 mm (1.6 in)	23.7 mm (0.9 in)	44 years	47 of 100 (Notable)
17 September 1977	Nququ (Bos), ZA	monthly rain	91.7 mm (3.6 in)	19.3 mm (0.8 in)	46 years	46 of 100 (Notable)
17 September 1977	Eureka, US	daily snowfall	6.4 cm (2.5 in)	6.4 cm (2.5 in)	85 years	46 of 100 (Notable)
17 September 1977	Jungapeo, MX	monthly high max	37.8 C (100.0 F)	5.0 C (9.0 F)	34 years	45 of 100 (Notable)
17 September 1977	Bikaner, IN	daily rain	80.0 mm (3.1 in)	61.7 mm (2.4 in)	23 years	43 of 100 (Notable)
17 September 1977	Franklinville, US	daily rain	27.9 mm (1.1 in)	12.7 mm (0.5 in)	76 years	43 of 100 (Notable)
17 September 1977	Stockton Fire STN 4, US	daily low max	16.1 C (61.0 F)	8.3 C (14.9 F)	51 years	42 of 100 (Notable)
17 September 1977	Ripon 5 NE, US	daily rain	45.7 mm (1.8 in)	35.8 mm (1.4 in)	7 years	39 of 100 (Notable)
17 September 1977	Crete 4ESE, US	daily rain	34.3 mm (1.4 in)	15.0 mm (0.6 in)	71 years	38 of 100 (Notable)
17 September 1977	New Berlin, US	daily rain	40.6 mm (1.6 in)	26.9 mm (1.1 in)	20 years	38 of 100 (Notable)
17 September 1977	Adiake, CI	daily rain	55.2 mm (2.2 in)	37.8 mm (1.5 in)	20 years	37 of 100 (Notable)
17 September 1977	Willow Sprg Radio Kuku, US	daily high min	23.3 C (73.9 F)	3.3 C (5.9 F)	77 years	37 of 100 (Notable)
17 September 1977	Wasta, US	daily rain	28.7 mm (1.1 in)	22.9 mm (0.9 in)	18 years	37 of 100 (Notable)
17 September 1977	Thomas River (Pol), ZA	daily rain	30.0 mm (1.2 in)	22.0 mm (0.9 in)	19 years	36 of 100 (Notable)
17 September 1977	Visby_Flygplats, SE	daily low max	9.0 C (48.2 F)	0.5 C (0.9 F)	87 years	36 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

1796 to 1977

Records set or tied on this calendar date in each year from 1796 to 1977. 1977 had 641 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1977-09-17: 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 10	467
10 to 20	32
20 to 30	12
30 to 40	6
40 to 50	2
50 to 60	1
60 to 70	3