Weather Records on 15 September 1977

400 weather records were set or tied worldwide on 15 September 1977. Highest significance: Cemal, RU.

Key Facts for 15 September 1977

On 15 September 1977, 400 weather records were set or tied at long-record stations worldwide.
82 were record highs and 177 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 389 daily.
Cemal set a monthly record daily precipitation of 49.7 mm (2.0 in) on 15 September 1977.
Across 170 earlier years (1797 to 2026) the same calendar date averaged 413 records.

Record Map

400 stations

400 station records on 15 September 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 September 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Cemal	Russia	Record daily precipitation	49.7 mm (2.0 in)	51 of 100 (Notable)
Anderson	United States	Record daily precipitation	101.6 mm (4.0 in)	51 of 100 (Notable)
Pskov	Russia	Record daily precipitation	27.8 mm (1.1 in)	46 of 100 (Notable)
Poortjie	South Africa	Record daily precipitation	41.0 mm (1.6 in)	43 of 100 (Notable)
Verma	Norway	Record snow depth	20.0 cm (7.9 in)	38 of 100 (Notable)
Mulberry 6 NNE	United States	Record daily precipitation	109.0 mm (4.3 in)	37 of 100 (Notable)
Puerto Madero	Mexico	Record low minimum temperature	10.6 C (51.1 F)	36 of 100 (Notable)
Sacramento 5 ESE	United States	Record low maximum temperature	20.6 C (69.1 F)	36 of 100 (Notable)
Palmerville	Australia	Record low minimum temperature	10.0 C (50.0 F)	35 of 100 (Notable)
Ceylon	Canada	Record daily precipitation	30.7 mm (1.2 in)	35 of 100 (Notable)
Yajlju	Russia	Record daily precipitation	35.8 mm (1.4 in)	35 of 100 (Notable)
Yellow Grass	Canada	Record daily precipitation	30.0 mm (1.2 in)	34 of 100 (Routine)
Belya	Russia	Record daily precipitation	41.3 mm (1.6 in)	34 of 100 (Routine)
San Bernardino F S 226	United States	Record low maximum temperature	24.4 C (75.9 F)	34 of 100 (Routine)
Shirley	United States	Record daily precipitation	88.4 mm (3.5 in)	33 of 100 (Routine)
Port Hastings	Canada	Record low maximum temperature	12.8 C (55.0 F)	32 of 100 (Routine)
Hartwell	United States	Record daily precipitation	45.7 mm (1.8 in)	32 of 100 (Routine)
Warren 3 S	United States	Record low maximum temperature	15.6 C (60.1 F)	32 of 100 (Routine)
Chattanooga AP	United States	Record daily precipitation	52.3 mm (2.1 in)	32 of 100 (Routine)
Port Aux Basques	Canada	Record daily precipitation	52.0 mm (2.0 in)	31 of 100 (Routine)
St. Petersburg	Russia	Record low maximum temperature	7.4 C (45.3 F)	30 of 100 (Routine)
Auburn	United States	Record low maximum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Waynesboro	United States	Record daily precipitation	42.2 mm (1.7 in)	30 of 100 (Routine)
Mirannie	Australia	Record daily precipitation	34.4 mm (1.4 in)	29 of 100 (Routine)
Saint Helena	United States	Record low maximum temperature	18.9 C (66.0 F)	29 of 100 (Routine)
Vacaville	United States	Record low maximum temperature	21.7 C (71.1 F)	29 of 100 (Routine)
Paw Paw 2S	United States	Record daily precipitation	38.6 mm (1.5 in)	29 of 100 (Routine)
El Carmen (Smn)	Mexico	Record high minimum temperature	27.2 C (81.0 F)	28 of 100 (Routine)
Parma	United States	Record daily precipitation	32.5 mm (1.3 in)	28 of 100 (Routine)
Bolivar Wtr Wks	United States	Record daily precipitation	56.4 mm (2.2 in)	28 of 100 (Routine)
Indian Head Cda	Canada	Record daily precipitation	26.7 mm (1.1 in)	27 of 100 (Routine)
Arecibo 3 ESE	Puerto Rico [United States]	Record low maximum temperature	30.0 C (86.0 F)	27 of 100 (Routine)
Franklin Sewage Plt	United States	Record daily precipitation	45.7 mm (1.8 in)	27 of 100 (Routine)
Wappapello Dam	United States	Record daily precipitation	38.6 mm (1.5 in)	26 of 100 (Routine)
Narrogin	Australia	Record high minimum temperature	11.0 C (51.8 F)	25 of 100 (Routine)
Harrow Cda	Canada	Record daily precipitation	25.6 mm (1.0 in)	25 of 100 (Routine)
Chico UNIV Farm	United States	Record low maximum temperature	23.9 C (75.0 F)	25 of 100 (Routine)
Lake Cormorant	United States	Record daily precipitation	26.9 mm (1.1 in)	25 of 100 (Routine)
Puxico 1 SE	United States	Record daily precipitation	28.4 mm (1.1 in)	25 of 100 (Routine)
Riddle	United States	Record low maximum temperature	16.7 C (62.1 F)	25 of 100 (Routine)
Tibooburra Post Office	Australia	Record low minimum temperature	2.7 C (36.9 F)	24 of 100 (Routine)
Matehuala (Smn)	Mexico	Record low minimum temperature	7.8 C (46.0 F)	24 of 100 (Routine)
Calico Rock 2 WSW	United States	Record daily precipitation	41.7 mm (1.6 in)	24 of 100 (Routine)
Wauseon Wtp	United States	Record low maximum temperature	15.6 C (60.1 F)	24 of 100 (Routine)
Pavillion	United States	Record high minimum temperature	12.8 C (55.0 F)	24 of 100 (Routine)
Bozeman Gallatin Fld AP	United States	Record daily precipitation	25.1 mm (1.0 in)	24 of 100 (Routine)
Booneville	United States	Record daily precipitation	26.7 mm (1.1 in)	23 of 100 (Routine)
Vilnius	Lithuania	Record low maximum temperature	10.2 C (50.4 F)	22 of 100 (Routine)
Villa Ahumada	Mexico	Record high maximum temperature	38.9 C (102.0 F)	22 of 100 (Routine)
Mtn View	United States	Record daily precipitation	73.2 mm (2.9 in)	22 of 100 (Routine)
Tejon Rancho	United States	Record low minimum temperature	8.3 C (46.9 F)	22 of 100 (Routine)
Weiser	United States	Record high minimum temperature	13.9 C (57.0 F)	22 of 100 (Routine)
Wateree Dam	United States	Record daily precipitation	59.4 mm (2.3 in)	22 of 100 (Routine)
Des Arc	United States	Record daily precipitation	32.3 mm (1.3 in)	21 of 100 (Routine)
Waynesburg 7 NE	United States	Record daily precipitation	48.5 mm (1.9 in)	21 of 100 (Routine)
Clarksville 2NE	United States	Record low maximum temperature	21.7 C (71.1 F)	21 of 100 (Routine)
Canyon Creek	United States	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Maristova	Norway	Record snow depth	2.0 cm (0.8 in)	20 of 100 (Routine)
Ongudaj	Russia	Record daily precipitation	22.2 mm (0.9 in)	20 of 100 (Routine)
Border 3 N	United States	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

400 records

Records set or tied on 15 September 1977 by type: Highest daily maximum 32, Lowest daily maximum 123, Highest daily minimum 50, Lowest daily minimum 54, Heaviest daily rainfall 138, Deepest snow cover 3.

Records on 15 September 1977 by type
Record type	Records
Highest daily maximum	32
Lowest daily maximum	123
Highest daily minimum	50
Lowest daily minimum	54
Heaviest daily rainfall	138
Heaviest daily snowfall	0
Deepest snow cover	3

Records on 15 September 1977 by timescale: all-time 0, monthly 11, daily 389.

How Much Records Were Beaten By

306 broken records

Margins by which the 306 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 72.1. Ties are not counted.

Top 20 by Significance

15 September 1977

Top 20 records on 15 September 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 September 1977	Cemal, RU	monthly rain	49.7 mm (2.0 in)	14.6 mm (0.6 in)	21 years	51 of 100 (Notable)
15 September 1977	Anderson, US	daily rain	101.6 mm (4.0 in)	72.1 mm (2.8 in)	16 years	51 of 100 (Notable)
15 September 1977	Pskov, RU	daily rain	27.8 mm (1.1 in)	19.2 mm (0.8 in)	23 years	46 of 100 (Notable)
15 September 1977	Poortjie, ZA	monthly rain	41.0 mm (1.6 in)	4.7 mm (0.19 in)	69 years	43 of 100 (Notable)
15 September 1977	Verma, NO	monthly snow depth	20.0 cm (7.9 in)	5.0 cm (2.0 in)	54 years	38 of 100 (Notable)
15 September 1977	Mulberry 6 NNE, US	monthly rain	109.0 mm (4.3 in)	25.4 mm (1.0 in)	32 years	37 of 100 (Notable)
15 September 1977	Puerto Madero, MX	daily low min	10.6 C (51.1 F)	6.1 C (11.0 F)	26 years	36 of 100 (Notable)
15 September 1977	Sacramento 5 ESE, US	daily low max	20.6 C (69.1 F)	0.5 C (0.9 F)	85 years	36 of 100 (Notable)
15 September 1977	Palmerville, AU	daily low min	10.0 C (50.0 F)	0.9 C (1.6 F)	80 years	35 of 100 (Notable)
15 September 1977	Ceylon, CA	daily rain	30.7 mm (1.2 in)	16.2 mm (0.6 in)	44 years	35 of 100 (Notable)
15 September 1977	Yajlju, RU	daily rain	35.8 mm (1.4 in)	18.0 mm (0.7 in)	22 years	35 of 100 (Notable)
15 September 1977	Yellow Grass, CA	daily rain	30.0 mm (1.2 in)	11.7 mm (0.5 in)	44 years	34 of 100 (Routine)
15 September 1977	Belya, RU	monthly rain	41.3 mm (1.6 in)	6.2 mm (0.24 in)	23 years	34 of 100 (Routine)
15 September 1977	San Bernardino F S 226, US	daily low max	24.4 C (75.9 F)	0.6 C (1.1 F)	83 years	34 of 100 (Routine)
15 September 1977	Shirley, US	daily rain	88.4 mm (3.5 in)	55.9 mm (2.2 in)	15 years	33 of 100 (Routine)
15 September 1977	Port Hastings, CA	daily low max	12.8 C (55.0 F)	0.5 C (0.9 F)	71 years	32 of 100 (Routine)
15 September 1977	Hartwell, US	daily rain	45.7 mm (1.8 in)	9.9 mm (0.39 in)	68 years	32 of 100 (Routine)
15 September 1977	Warren 3 S, US	daily low max	15.6 C (60.1 F)	1.6 C (2.9 F)	72 years	32 of 100 (Routine)
15 September 1977	Chattanooga AP, US	daily rain	52.3 mm (2.1 in)	32.5 mm (1.3 in)	34 years	32 of 100 (Routine)
15 September 1977	Port Aux Basques, CA	daily rain	52.0 mm (2.0 in)	23.0 mm (0.9 in)	6 years	31 of 100 (Routine)

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 1977

Records set or tied on this calendar date in each year from 1797 to 1977. 1977 had 400 records.

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

Records on 09-15 in each year
Year	Records
1797	1
1803	1
1806	2
1810	1
1816	1
1818	1
1823	2
1833	1
1836	1
1837	2
1839	1
1841	1
1848	1
1850	1
1851	1
1854	2
1856	1
1857	1
1859	1
1864	1
1865	2
1866	1
1867	2
1868	1
1869	1
1872	1
1873	2
1876	2
1877	2
1880	1
1881	1
1882	6
1884	3
1885	4
1886	2
1887	3
1888	1
1889	5
1890	1
1894	4
1895	1
1897	1
1898	3
1899	3
1900	1
1901	12
1902	7
1903	31
1904	30
1905	16
1906	6
1907	7
1908	16
1909	16
1910	2
1911	40
1912	64
1913	43
1914	18
1915	94
1916	44
1917	50
1918	50
1919	52
1920	164
1921	122
1922	53
1923	193
1924	103
1925	112
1926	134
1927	539
1928	86
1929	99
1930	235
1931	422
1932	295
1933	322
1934	351
1935	463
1936	460
1937	337
1938	247
1939	1,098
1940	181
1941	276
1942	278
1943	360
1944	396
1945	418
1946	411
1947	621
1948	557
1949	523
1950	750
1951	283
1952	455
1953	400
1954	518
1955	532
1956	646
1957	449
1958	294
1959	844
1960	410
1961	586
1962	557
1963	455
1964	839
1965	614
1966	534
1967	578
1968	429
1969	362
1970	1,157
1971	598
1972	356
1973	774
1974	386
1975	739
1976	667
1977	400
1978	628
1979	1,022
1980	563
1981	613
1982	1,315
1983	756
1984	766
1985	764
1986	928
1987	719
1988	818
1989	955
1990	911
1991	1,165
1992	919
1993	2,227
1994	1,363
1995	723
1996	1,212
1997	1,177
1998	1,768
1999	858
2000	1,175
2001	837
2002	1,212
2003	855
2004	893
2005	1,123
2006	1,042
2007	946
2008	1,153
2009	773
2010	913
2011	1,170
2012	568
2013	854
2014	443
2015	997
2016	988
2017	825
2018	874
2019	538
2020	785
2021	467
2022	392
2023	507
2024	681
2025	503
2026	779

Download the Data

Data for records on 1977-09-15: 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	262
10 to 20	30
20 to 30	8
30 to 40	2
40 to 50	0
50 to 60	3
60 to 70	0
70 to 80	1