Weather Records on 9 May 1977

931 weather records were set or tied worldwide on 9 May 1977. Highest significance: Klipfontein, ZA.

Key Facts for 9 May 1977

On 9 May 1977, 931 weather records were set or tied at long-record stations worldwide.
331 were record highs and 181 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 82 monthly and 848 daily.
Klipfontein set an all-time record daily precipitation of 143.8 mm (5.7 in) on 9 May 1977.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 429 records.

Record Map

931 stations

931 station records on 9 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Klipfontein	South Africa	Record daily precipitation	143.8 mm (5.7 in)	81 of 100 (Exceptional)
Palomar Mtn Obsy	United States	Record daily precipitation	93.7 mm (3.7 in)	79 of 100 (Major)
Tustin Irvine Rch	United States	Record daily precipitation	46.2 mm (1.8 in)	71 of 100 (Major)
Clinton	United States	Record daily snowfall	16.5 cm (6.5 in)	71 of 100 (Major)
Alicedale	South Africa	Record daily precipitation	86.1 mm (3.4 in)	69 of 100 (Major)
Hofmeyer (Mun)	South Africa	Record daily precipitation	42.5 mm (1.7 in)	68 of 100 (Major)
Chula Vista	United States	Record daily precipitation	30.7 mm (1.2 in)	62 of 100 (Major)
Fairmont	United States	Record daily precipitation	67.1 mm (2.6 in)	62 of 100 (Major)
Hemet	United States	Record daily precipitation	63.0 mm (2.5 in)	62 of 100 (Major)
Pacoima Dam Fc33A-E	United States	Record daily precipitation	87.9 mm (3.5 in)	61 of 100 (Major)
Walnut Ni Fc102C	United States	Record daily precipitation	40.6 mm (1.6 in)	61 of 100 (Major)
Mohonk Lake	United States	Record daily snowfall	31.0 cm (12.2 in)	61 of 100 (Major)
Big Pines Park Fc83B	United States	Record daily precipitation	73.7 mm (2.9 in)	60 of 100 (Major)
Dry Canyon Rsvr	United States	Record daily precipitation	68.3 mm (2.7 in)	60 of 100 (Major)
Los Alamos	United States	Record daily precipitation	43.7 mm (1.7 in)	60 of 100 (Major)
Coetzeekraal	South Africa	Record daily precipitation	88.5 mm (3.5 in)	59 of 100 (Notable)
Descanso Rs	United States	Record daily precipitation	36.6 mm (1.4 in)	59 of 100 (Notable)
Juncal Dam	United States	Record daily precipitation	80.0 mm (3.1 in)	59 of 100 (Notable)
Beaumont #2	United States	Record daily precipitation	48.5 mm (1.9 in)	59 of 100 (Notable)
La Mesa	United States	Record daily precipitation	40.9 mm (1.6 in)	58 of 100 (Notable)
Pioche	United States	Record daily precipitation	27.9 mm (1.1 in)	57 of 100 (Notable)
Henshaw Dam	United States	Record daily precipitation	55.9 mm (2.2 in)	56 of 100 (Notable)
Pafuri	South Africa	Record daily precipitation	29.0 mm (1.1 in)	54 of 100 (Notable)
Elsinore	United States	Record daily precipitation	26.7 mm (1.1 in)	54 of 100 (Notable)
Saugus Pwr Plt 1	United States	Record daily precipitation	75.2 mm (3.0 in)	54 of 100 (Notable)
Auburn	United States	Record snow depth	22.9 cm (9.0 in)	54 of 100 (Notable)
Lake Arrowhead	United States	Record daily snowfall	20.3 cm (8.0 in)	53 of 100 (Notable)
Poway Valley	United States	Record daily precipitation	33.5 mm (1.3 in)	52 of 100 (Notable)
Auburn	United States	Record daily snowfall	22.9 cm (9.0 in)	52 of 100 (Notable)
Claremont Pomona Clg	United States	Record daily precipitation	62.7 mm (2.5 in)	51 of 100 (Notable)
Ojai	United States	Record daily precipitation	61.0 mm (2.4 in)	49 of 100 (Notable)
Timbauba	Brazil	Record daily precipitation	100.9 mm (4.0 in)	48 of 100 (Notable)
Taunton	United States	Record daily snowfall	5.1 cm (2.0 in)	48 of 100 (Notable)
Arcade	United States	Record daily snowfall	7.6 cm (3.0 in)	48 of 100 (Notable)
Cooperstown	United States	Record daily snowfall	20.8 cm (8.2 in)	48 of 100 (Notable)
Cuyamaca	United States	Record daily precipitation	64.5 mm (2.5 in)	47 of 100 (Notable)
Norfolk 2 SW	United States	Record daily snowfall	24.1 cm (9.5 in)	47 of 100 (Notable)
Rodessa	United States	Record daily precipitation	89.4 mm (3.5 in)	46 of 100 (Notable)
Altadena	United States	Record daily precipitation	39.4 mm (1.6 in)	45 of 100 (Notable)
Tupper Lake Sunmount	United States	Record daily snowfall	7.6 cm (3.0 in)	45 of 100 (Notable)
Ny City Cntrl Park	United States	Record low maximum temperature	6.7 C (44.1 F)	45 of 100 (Notable)
Jonkersberg (Bos)	South Africa	Record daily precipitation	72.0 mm (2.8 in)	44 of 100 (Notable)
Rooirivier (Bos)	South Africa	Record daily precipitation	37.5 mm (1.5 in)	44 of 100 (Notable)
Barrett Dam	United States	Record daily precipitation	25.1 mm (1.0 in)	44 of 100 (Notable)
Haiwee	United States	Record daily precipitation	34.5 mm (1.4 in)	44 of 100 (Notable)
Big Dalton Dam Fc223C	United States	Record daily precipitation	57.4 mm (2.3 in)	43 of 100 (Notable)
Mojave	United States	Record daily precipitation	27.9 mm (1.1 in)	43 of 100 (Notable)
San Luis Obispo Poly	United States	Record daily precipitation	31.2 mm (1.2 in)	43 of 100 (Notable)
Peru	United States	Record daily snowfall	15.2 cm (6.0 in)	42 of 100 (Notable)
Oudtshoorn	South Africa	Record daily precipitation	25.0 mm (1.0 in)	40 of 100 (Notable)
Glendora Fc 287B	United States	Record daily precipitation	57.7 mm (2.3 in)	40 of 100 (Notable)
Norfolk 2 SW	United States	Record snow depth	22.9 cm (9.0 in)	40 of 100 (Notable)
Sharon Springs	United States	Record high minimum temperature	19.4 C (66.9 F)	40 of 100 (Notable)
Glens Falls Farm	United States	Record daily precipitation	52.6 mm (2.1 in)	40 of 100 (Notable)
Maasbult	South Africa	Record daily precipitation	29.5 mm (1.2 in)	39 of 100 (Notable)
Palomar Mtn Obsy	United States	Record daily snowfall	5.1 cm (2.0 in)	39 of 100 (Notable)
Norfolk 2 SW	United States	Record daily precipitation	42.2 mm (1.7 in)	39 of 100 (Notable)
Gabriels	United States	Record daily snowfall	10.2 cm (4.0 in)	39 of 100 (Notable)
Williston Sloulin Fld	United States	Record high minimum temperature	16.1 C (61.0 F)	39 of 100 (Notable)
Thiruvananthapuram	India	Record daily precipitation	140.0 mm (5.5 in)	38 of 100 (Notable)

Counts by Type and Timescale

931 records

Records set or tied on 9 May 1977 by type: Highest daily maximum 150, Lowest daily maximum 104, Highest daily minimum 181, Lowest daily minimum 77, Heaviest daily rainfall 324, Heaviest daily snowfall 77, Deepest snow cover 18.

Records on 9 May 1977 by type
Record type	Records
Highest daily maximum	150
Lowest daily maximum	104
Highest daily minimum	181
Lowest daily minimum	77
Heaviest daily rainfall	324
Heaviest daily snowfall	77
Deepest snow cover	18

Records on 9 May 1977 by timescale: all-time 1, monthly 82, daily 848.

How Much Records Were Beaten By

799 broken records

Margins by which the 799 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 257.0. Ties are not counted.

Top 20 by Significance

9 May 1977

Top 20 records on 9 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 1977	Klipfontein, ZA	all-time rain	143.8 mm (5.7 in)	65.8 mm (2.6 in)	45 years	81 of 100 (Exceptional)
9 May 1977	Palomar Mtn Obsy, US	monthly rain	93.7 mm (3.7 in)	55.6 mm (2.2 in)	76 years	79 of 100 (Major)
9 May 1977	Tustin Irvine Rch, US	monthly rain	46.2 mm (1.8 in)	20.0 mm (0.8 in)	47 years	71 of 100 (Major)
9 May 1977	Clinton, US	monthly snowfall	16.5 cm (6.5 in)	16.5 cm (6.5 in)	72 years	71 of 100 (Major)
9 May 1977	Alicedale, ZA	daily rain	86.1 mm (3.4 in)	50.8 mm (2.0 in)	88 years	69 of 100 (Major)
9 May 1977	Hofmeyer (Mun), ZA	daily rain	42.5 mm (1.7 in)	39.5 mm (1.6 in)	68 years	68 of 100 (Major)
9 May 1977	Chula Vista, US	daily rain	30.7 mm (1.2 in)	28.7 mm (1.1 in)	55 years	62 of 100 (Major)
9 May 1977	Fairmont, US	monthly rain	67.1 mm (2.6 in)	27.7 mm (1.1 in)	22 years	62 of 100 (Major)
9 May 1977	Hemet, US	monthly rain	63.0 mm (2.5 in)	44.2 mm (1.7 in)	22 years	62 of 100 (Major)
9 May 1977	Pacoima Dam Fc33A-E, US	monthly rain	87.9 mm (3.5 in)	59.2 mm (2.3 in)	27 years	61 of 100 (Major)
9 May 1977	Walnut Ni Fc102C, US	monthly rain	40.6 mm (1.6 in)	21.5 mm (0.8 in)	22 years	61 of 100 (Major)
9 May 1977	Mohonk Lake, US	monthly snowfall	31.0 cm (12.2 in)	25.7 cm (10.1 in)	10 years	61 of 100 (Major)
9 May 1977	Big Pines Park Fc83B, US	monthly rain	73.7 mm (2.9 in)	33.1 mm (1.3 in)	22 years	60 of 100 (Major)
9 May 1977	Dry Canyon Rsvr, US	monthly rain	68.3 mm (2.7 in)	28.7 mm (1.1 in)	22 years	60 of 100 (Major)
9 May 1977	Los Alamos, US	monthly rain	43.7 mm (1.7 in)	11.7 mm (0.5 in)	82 years	60 of 100 (Major)
9 May 1977	Coetzeekraal, ZA	monthly rain	88.5 mm (3.5 in)	35.2 mm (1.4 in)	37 years	59 of 100 (Notable)
9 May 1977	Descanso Rs, US	daily rain	36.6 mm (1.4 in)	30.0 mm (1.2 in)	64 years	59 of 100 (Notable)
9 May 1977	Juncal Dam, US	monthly rain	80.0 mm (3.1 in)	35.5 mm (1.4 in)	20 years	59 of 100 (Notable)
9 May 1977	Beaumont #2, US	monthly rain	48.5 mm (1.9 in)	23.1 mm (0.9 in)	22 years	59 of 100 (Notable)
9 May 1977	La Mesa, US	monthly rain	40.9 mm (1.6 in)	9.1 mm (0.36 in)	77 years	58 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 931 records.

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

Records on 05-09 in each year
Year	Records
1793	1
1795	1
1806	1
1810	1
1823	1
1834	1
1838	1
1843	1
1845	2
1846	1
1848	1
1850	2
1855	2
1857	1
1858	1
1861	1
1862	1
1864	2
1865	2
1867	2
1872	1
1873	2
1874	1
1875	2
1879	4
1880	3
1882	1
1883	2
1884	3
1885	3
1889	3
1890	3
1891	3
1892	1
1893	1
1895	2
1896	4
1897	3
1898	3
1899	2
1900	2
1901	9
1902	8
1903	9
1904	14
1905	34
1906	41
1907	11
1908	16
1909	34
1910	45
1911	23
1912	23
1913	15
1914	43
1915	27
1916	26
1917	50
1918	49
1919	47
1920	56
1921	102
1922	45
1923	461
1924	262
1925	123
1926	196
1927	343
1928	302
1929	166
1930	526
1931	411
1932	132
1933	482
1934	750
1935	111
1936	622
1937	128
1938	171
1939	345
1940	237
1941	335
1942	180
1943	524
1944	412
1945	538
1946	278
1947	1,145
1948	379
1949	417
1950	660
1951	188
1952	348
1953	507
1954	489
1955	288
1956	722
1957	505
1958	355
1959	252
1960	748
1961	516
1962	435
1963	1,103
1964	503
1965	730
1966	994
1967	681
1968	545
1969	653
1970	372
1971	338
1972	587
1973	386
1974	699
1975	465
1976	714
1977	931
1978	649
1979	1,605
1980	1,030
1981	639
1982	523
1983	872
1984	892
1985	829
1986	1,253
1987	1,481
1988	594
1989	1,347
1990	850
1991	759
1992	1,476
1993	967
1994	573
1995	960
1996	1,260
1997	1,088
1998	1,182
1999	970
2000	1,114
2001	969
2002	1,489
2003	1,802
2004	926
2005	851
2006	738
2007	765
2008	693
2009	816
2010	764
2011	1,104
2012	686
2013	684
2014	754
2015	689
2016	917
2017	539
2018	879
2019	1,043
2020	1,673
2021	501
2022	1,308
2023	474
2024	792
2025	622
2026	309

Download the Data

Data for records on 1977-05-09: 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 50	761
50 to 100	30
100 to 150	1
150 to 200	4
200 to 250	2
250 to 300	1