Weather Records on 23 August 1977

557 weather records were set or tied worldwide on 23 August 1977. Highest significance: Nebo, ZA.

Key Facts for 23 August 1977

On 23 August 1977, 557 weather records were set or tied at long-record stations worldwide.
188 were record highs and 163 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 20 monthly and 537 daily.
Nebo set a daily record precipitation of 30.5 mm (1.2 in) on 23 August 1977.
Across 164 earlier years (1802 to 2026) the same calendar date averaged 443 records.

Record Map

557 stations

557 station records on 23 August 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 August 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Nebo	South Africa	Record daily precipitation	30.5 mm (1.2 in)	65 of 100 (Major)
Drain	United States	Record daily precipitation	39.4 mm (1.6 in)	62 of 100 (Major)
Nylsvley	South Africa	Record daily precipitation	30.0 mm (1.2 in)	59 of 100 (Notable)
Alkmaar	South Africa	Record daily precipitation	26.0 mm (1.0 in)	55 of 100 (Notable)
Clay Ctr	United States	Record daily precipitation	83.3 mm (3.3 in)	53 of 100 (Notable)
Alton 1 W	United States	Record daily precipitation	72.6 mm (2.9 in)	50 of 100 (Notable)
Vestervig	Denmark	Record low minimum temperature	5.1 C (41.2 F)	49 of 100 (Notable)
Le Roy	United States	Record daily precipitation	69.6 mm (2.7 in)	47 of 100 (Notable)
Wamego 4 W	United States	Record daily precipitation	67.8 mm (2.7 in)	44 of 100 (Notable)
Gann Valley 4NW	United States	Record daily precipitation	37.1 mm (1.5 in)	44 of 100 (Notable)
Seattle Urban Site	United States	Record daily precipitation	39.1 mm (1.5 in)	44 of 100 (Notable)
Zagreb-Gric	Croatia	Record daily precipitation	40.9 mm (1.6 in)	43 of 100 (Notable)
Verhoture	Russia	Record daily precipitation	55.5 mm (2.2 in)	43 of 100 (Notable)
Nome AP	United States	Record high maximum temperature	25.0 C (77.0 F)	42 of 100 (Notable)
Pilgrims Rest (Pol)	South Africa	Record daily precipitation	26.0 mm (1.0 in)	41 of 100 (Notable)
Reston	United States	Record daily precipitation	30.0 mm (1.2 in)	41 of 100 (Notable)
Reserve	United States	Record daily precipitation	78.7 mm (3.1 in)	40 of 100 (Notable)
Martenshoop (Pol)	South Africa	Record daily precipitation	31.0 mm (1.2 in)	39 of 100 (Notable)
Lebo	United States	Record daily precipitation	50.3 mm (2.0 in)	39 of 100 (Notable)
Lincoln 1 SE	United States	Record daily precipitation	61.0 mm (2.4 in)	39 of 100 (Notable)
Overbrook 5 SE	United States	Record daily precipitation	64.3 mm (2.5 in)	38 of 100 (Notable)
Fargo Hector Intl AP	United States	Record low maximum temperature	15.6 C (60.1 F)	38 of 100 (Notable)
Aleksandrovsk-Sahalinskij	Russia	Record high maximum temperature	27.9 C (82.2 F)	37 of 100 (Notable)
Mac Mac Bos	South Africa	Record daily precipitation	29.5 mm (1.2 in)	36 of 100 (Notable)
Covington 8 WNW	United States	Record daily precipitation	51.6 mm (2.0 in)	36 of 100 (Notable)
Ceylon (Bos)	South Africa	Record daily precipitation	28.0 mm (1.1 in)	35 of 100 (Notable)
Simmesport	United States	Record daily precipitation	62.2 mm (2.4 in)	35 of 100 (Notable)
Coupeville 1 S	United States	Record daily precipitation	25.9 mm (1.0 in)	35 of 100 (Notable)
Ojo de Agua	Mexico	Record low minimum temperature	10.0 C (50.0 F)	34 of 100 (Routine)
Witklip (Bos)	South Africa	Record daily precipitation	27.0 mm (1.1 in)	34 of 100 (Routine)
Chapman	United States	Record daily precipitation	57.2 mm (2.3 in)	34 of 100 (Routine)
Sonora	United States	Record high maximum temperature	41.1 C (106.0 F)	34 of 100 (Routine)
Dresden	United States	Record daily precipitation	29.5 mm (1.2 in)	33 of 100 (Routine)
Hammond	United States	Record low maximum temperature	26.7 C (80.1 F)	33 of 100 (Routine)
Snoqualmie Falls	United States	Record daily precipitation	45.5 mm (1.8 in)	33 of 100 (Routine)
Orel	Russia	Record daily precipitation	52.9 mm (2.1 in)	32 of 100 (Routine)
Conway Springs 4SW	United States	Record daily precipitation	53.3 mm (2.1 in)	32 of 100 (Routine)
Oaknolia 2N	United States	Record daily precipitation	61.5 mm (2.4 in)	32 of 100 (Routine)
Willow Sprg Radio Kuku	United States	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Renfrow 1 E	United States	Record daily precipitation	55.1 mm (2.2 in)	32 of 100 (Routine)
White Lake	United States	Record daily precipitation	48.8 mm (1.9 in)	32 of 100 (Routine)
Hornepayne	Canada	Record low maximum temperature	9.0 C (48.2 F)	31 of 100 (Routine)
Apuka	Russia	Record high maximum temperature	21.9 C (71.4 F)	31 of 100 (Routine)
Selemdza	Russia	Record daily precipitation	41.0 mm (1.6 in)	31 of 100 (Routine)
Newport Beach Harbor	United States	Record high minimum temperature	21.1 C (70.0 F)	31 of 100 (Routine)
Cawker City	United States	Record daily precipitation	60.7 mm (2.4 in)	31 of 100 (Routine)
Ottawa	United States	Record daily precipitation	25.9 mm (1.0 in)	31 of 100 (Routine)
Fullerton	United States	Record daily precipitation	25.1 mm (1.0 in)	31 of 100 (Routine)
Turtle Lake	United States	Record low maximum temperature	12.8 C (55.0 F)	31 of 100 (Routine)
Ft Gibson Dam	United States	Record daily precipitation	40.6 mm (1.6 in)	31 of 100 (Routine)
Bonham 3NNE	United States	Record high minimum temperature	27.2 C (81.0 F)	31 of 100 (Routine)
Leamington	Canada	Record daily precipitation	40.6 mm (1.6 in)	30 of 100 (Routine)
Segovia (Mariano Quintanilla)	Spain	Record low minimum temperature	4.8 C (40.6 F)	30 of 100 (Routine)
Sibley	United States	Record low maximum temperature	16.7 C (62.1 F)	30 of 100 (Routine)
Martin	United States	Record daily precipitation	38.1 mm (1.5 in)	30 of 100 (Routine)
Georgetown	United States	Record high maximum temperature	40.6 C (105.1 F)	30 of 100 (Routine)
Cacequi	Brazil	Record daily precipitation	72.2 mm (2.8 in)	29 of 100 (Routine)
Tallinn	Estonia	Record low minimum temperature	3.4 C (38.1 F)	29 of 100 (Routine)
Lindsborg 3E	United States	Record daily precipitation	40.6 mm (1.6 in)	29 of 100 (Routine)
Carville 2 SW	United States	Record daily precipitation	48.5 mm (1.9 in)	29 of 100 (Routine)

Counts by Type and Timescale

557 records

Records set or tied on 23 August 1977 by type: Highest daily maximum 92, Lowest daily maximum 80, Highest daily minimum 96, Lowest daily minimum 83, Heaviest daily rainfall 206.

Records on 23 August 1977 by type
Record type	Records
Highest daily maximum	92
Lowest daily maximum	80
Highest daily minimum	96
Lowest daily minimum	83
Heaviest daily rainfall	206
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 23 August 1977 by timescale: all-time 0, monthly 20, daily 537.

How Much Records Were Beaten By

443 broken records

Margins by which the 443 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 57.9. Ties are not counted.

Top 20 by Significance

23 August 1977

Top 20 records on 23 August 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 August 1977	Nebo, ZA	daily rain	30.5 mm (1.2 in)	30.5 mm (1.2 in)	71 years	65 of 100 (Major)
23 August 1977	Drain, US	monthly rain	39.4 mm (1.6 in)	16.3 mm (0.6 in)	33 years	62 of 100 (Major)
23 August 1977	Nylsvley, ZA	daily rain	30.0 mm (1.2 in)	30.0 mm (1.2 in)	60 years	59 of 100 (Notable)
23 August 1977	Alkmaar, ZA	daily rain	26.0 mm (1.0 in)	23.5 mm (0.9 in)	68 years	55 of 100 (Notable)
23 August 1977	Clay Ctr, US	daily rain	83.3 mm (3.3 in)	57.9 mm (2.3 in)	36 years	53 of 100 (Notable)
23 August 1977	Alton 1 W, US	daily rain	72.6 mm (2.9 in)	45.7 mm (1.8 in)	36 years	50 of 100 (Notable)
23 August 1977	Vestervig, DK	daily low min	5.1 C (41.2 F)	3.4 C (6.1 F)	75 years	49 of 100 (Notable)
23 August 1977	Le Roy, US	daily rain	69.6 mm (2.7 in)	42.2 mm (1.7 in)	50 years	47 of 100 (Notable)
23 August 1977	Wamego 4 W, US	daily rain	67.8 mm (2.7 in)	34.0 mm (1.3 in)	59 years	44 of 100 (Notable)
23 August 1977	Gann Valley 4NW, US	daily rain	37.1 mm (1.5 in)	16.8 mm (0.7 in)	76 years	44 of 100 (Notable)
23 August 1977	Seattle Urban Site, US	monthly rain	39.1 mm (1.5 in)	5.3 mm (0.21 in)	54 years	44 of 100 (Notable)
23 August 1977	Zagreb-Gric, HR	daily rain	40.9 mm (1.6 in)	3.5 mm (0.14 in)	104 years	43 of 100 (Notable)
23 August 1977	Verhoture, RU	daily rain	55.5 mm (2.2 in)	25.5 mm (1.0 in)	7 years	43 of 100 (Notable)
23 August 1977	Nome AP, US	daily high max	25.0 C (77.0 F)	5.0 C (9.0 F)	66 years	42 of 100 (Notable)
23 August 1977	Pilgrims Rest (Pol), ZA	daily rain	26.0 mm (1.0 in)	19.0 mm (0.7 in)	16 years	41 of 100 (Notable)
23 August 1977	Reston, US	monthly rain	30.0 mm (1.2 in)	11.2 mm (0.4 in)	1 year	41 of 100 (Notable)
23 August 1977	Reserve, US	daily rain	78.7 mm (3.1 in)	34.0 mm (1.3 in)	40 years	40 of 100 (Notable)
23 August 1977	Martenshoop (Pol), ZA	daily rain	31.0 mm (1.2 in)	20.8 mm (0.8 in)	34 years	39 of 100 (Notable)
23 August 1977	Lebo, US	daily rain	50.3 mm (2.0 in)	14.5 mm (0.6 in)	81 years	39 of 100 (Notable)
23 August 1977	Lincoln 1 SE, US	daily rain	61.0 mm (2.4 in)	26.7 mm (1.1 in)	50 years	39 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

1802 to 1977

Records set or tied on this calendar date in each year from 1802 to 1977. 1977 had 557 records.

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

Records on 08-23 in each year
Year	Records
1802	1
1805	1
1813	2
1816	2
1817	1
1818	1
1829	1
1839	3
1840	1
1846	1
1847	1
1848	1
1853	2
1857	1
1858	1
1864	1
1867	1
1869	1
1870	1
1871	1
1874	2
1877	2
1881	1
1882	2
1883	1
1884	2
1886	1
1887	2
1890	3
1891	4
1892	4
1893	4
1894	2
1895	3
1896	6
1897	1
1898	8
1899	8
1900	2
1901	10
1902	9
1903	9
1904	6
1905	8
1906	27
1907	15
1908	18
1909	10
1910	15
1911	23
1912	44
1913	9
1914	23
1915	63
1916	23
1917	26
1918	91
1919	24
1920	102
1921	280
1922	58
1923	284
1924	127
1925	182
1926	99
1927	198
1928	196
1929	240
1930	432
1931	412
1932	211
1933	342
1934	308
1935	220
1936	980
1937	522
1938	654
1939	439
1940	535
1941	375
1942	540
1943	505
1944	578
1945	338
1946	416
1947	1,071
1948	594
1949	456
1950	461
1951	347
1952	456
1953	292
1954	438
1955	375
1956	501
1957	645
1958	402
1959	494
1960	806
1961	644
1962	364
1963	380
1964	724
1965	357
1966	802
1967	541
1968	1,384
1969	728
1970	518
1971	610
1972	614
1973	650
1974	612
1975	627
1976	703
1977	557
1978	577
1979	459
1980	552
1981	663
1982	713
1983	1,264
1984	862
1985	1,187
1986	839
1987	1,119
1988	1,604
1989	902
1990	661
1991	697
1992	1,291
1993	796
1994	738
1995	1,212
1996	1,161
1997	1,599
1998	1,138
1999	802
2000	936
2001	834
2002	931
2003	1,103
2004	862
2005	786
2006	728
2007	1,513
2008	966
2009	1,241
2010	1,244
2011	1,412
2012	688
2013	397
2014	960
2015	673
2016	595
2017	543
2018	479
2019	445
2020	1,093
2021	629
2022	781
2023	1,287
2024	1,150
2025	1,295
2026	592

Download the Data

Data for records on 1977-08-23: 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 23 August 1977
Margin	Records
0 to 10	360
10 to 20	44
20 to 30	23
30 to 40	10
40 to 50	4
50 to 60	2