Weather Records on 10 May 1977

1,075 weather records were set or tied worldwide on 10 May 1977. Highest significance: Alliance, CA.

Key Facts for 10 May 1977

On 10 May 1977, 1,075 weather records were set or tied at long-record stations worldwide.
449 were record highs and 247 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 68 monthly and 1,007 daily.
Alliance set a monthly record daily precipitation of 67.1 mm (2.6 in) on 10 May 1977.
Across 163 earlier years (1805 to 2026) the same calendar date averaged 437 records.

Record Map

1,075 stations

1,075 station records on 10 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 10 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alliance	Canada	Record daily precipitation	67.1 mm (2.6 in)	72 of 100 (Major)
Boylston	United States	Record daily snowfall	17.8 cm (7.0 in)	71 of 100 (Major)
New Salem	United States	Record daily snowfall	14.0 cm (5.5 in)	70 of 100 (Major)
Franklin	United States	Record daily snowfall	20.3 cm (8.0 in)	69 of 100 (Major)
Chesterfield	United States	Record daily snowfall	30.5 cm (12.0 in)	64 of 100 (Major)
Gardner	United States	Record daily snowfall	30.5 cm (12.0 in)	63 of 100 (Major)
Blue Hill Coop	United States	Record snow depth	20.3 cm (8.0 in)	62 of 100 (Major)
Milford	United States	Record daily snowfall	17.8 cm (7.0 in)	62 of 100 (Major)
Ashburnham	United States	Record daily snowfall	25.9 cm (10.2 in)	60 of 100 (Major)
Blue Hill Coop	United States	Record daily snowfall	19.8 cm (7.8 in)	60 of 100 (Major)
Southbridge 3 SW	United States	Record daily snowfall	15.2 cm (6.0 in)	59 of 100 (Notable)
Ranfurly	Canada	Record daily precipitation	39.9 mm (1.6 in)	57 of 100 (Notable)
Framingham	United States	Record daily snowfall	12.7 cm (5.0 in)	57 of 100 (Notable)
Lawrence	United States	Record daily precipitation	82.3 mm (3.2 in)	57 of 100 (Notable)
Chestnut Hill	United States	Record daily snowfall	7.6 cm (3.0 in)	56 of 100 (Notable)
Sterling	United States	Record daily snowfall	8.9 cm (3.5 in)	56 of 100 (Notable)
Guna	India	Record daily precipitation	55.1 mm (2.2 in)	55 of 100 (Notable)
Ft Bidwell	United States	Record daily precipitation	32.3 mm (1.3 in)	55 of 100 (Notable)
Hardwick	United States	Record daily snowfall	35.6 cm (14.0 in)	55 of 100 (Notable)
Claremont Pomona Clg	United States	Record daily precipitation	31.2 mm (1.2 in)	54 of 100 (Notable)
Antelope 6 SSW	United States	Record daily precipitation	44.5 mm (1.8 in)	53 of 100 (Notable)
Farias Brito	Brazil	Record daily precipitation	46.2 mm (1.8 in)	51 of 100 (Notable)
Waiahi Upper 1052	United States	Record daily precipitation	84.3 mm (3.3 in)	51 of 100 (Notable)
Medicine Hat A	Canada	Record daily precipitation	36.3 mm (1.4 in)	50 of 100 (Notable)
Cardenas (Smn)	Mexico	Record daily precipitation	34.3 mm (1.4 in)	50 of 100 (Notable)
Big Dalton Dam Fc223C	United States	Record daily precipitation	43.9 mm (1.7 in)	50 of 100 (Notable)
Blue Hill Coop	United States	Record daily precipitation	71.9 mm (2.8 in)	50 of 100 (Notable)
Lake 2 N	United States	Record daily snowfall	12.7 cm (5.0 in)	50 of 100 (Notable)
Boylston	United States	Record daily precipitation	50.8 mm (2.0 in)	49 of 100 (Notable)
Hubbardston	United States	Record daily snowfall	20.3 cm (8.0 in)	49 of 100 (Notable)
Condon	United States	Record daily precipitation	29.7 mm (1.2 in)	48 of 100 (Notable)
Grizzly	United States	Record daily precipitation	42.2 mm (1.7 in)	48 of 100 (Notable)
Franklin	United States	Record daily precipitation	66.0 mm (2.6 in)	47 of 100 (Notable)
New Salem	United States	Record daily precipitation	47.5 mm (1.9 in)	47 of 100 (Notable)
Massabesic Lake	United States	Record daily precipitation	46.0 mm (1.8 in)	47 of 100 (Notable)
Lake 2 N	United States	Record daily precipitation	34.3 mm (1.4 in)	47 of 100 (Notable)
Sedgewick	Canada	Record daily precipitation	28.7 mm (1.1 in)	46 of 100 (Notable)
Ipswich	United States	Record daily precipitation	79.0 mm (3.1 in)	46 of 100 (Notable)
Round Grove	United States	Record daily snowfall	25.4 cm (10.0 in)	46 of 100 (Notable)
Chestnut Hill	United States	Record daily precipitation	76.2 mm (3.0 in)	45 of 100 (Notable)
Middleton	United States	Record daily precipitation	77.0 mm (3.0 in)	45 of 100 (Notable)
Joplin	United States	Record daily precipitation	40.1 mm (1.6 in)	45 of 100 (Notable)
Kapaa Stables 1104	United States	Record daily precipitation	65.3 mm (2.6 in)	45 of 100 (Notable)
Nappan Cda	Canada	Record daily snowfall	5.1 cm (2.0 in)	44 of 100 (Notable)
Heath	United States	Record daily snowfall	30.5 cm (12.0 in)	44 of 100 (Notable)
Spot Pond	United States	Record daily precipitation	76.2 mm (3.0 in)	44 of 100 (Notable)
Sterling	United States	Record daily precipitation	82.0 mm (3.2 in)	44 of 100 (Notable)
Kolo 1033	United States	Record daily precipitation	51.1 mm (2.0 in)	44 of 100 (Notable)
Buffalo	United States	Record high minimum temperature	12.2 C (54.0 F)	42 of 100 (Notable)
Kealia 1112	United States	Record daily precipitation	44.5 mm (1.8 in)	42 of 100 (Notable)
Moncton	Canada	Record daily precipitation	37.9 mm (1.5 in)	41 of 100 (Notable)
Mozajsk	Russia	Record daily precipitation	38.2 mm (1.5 in)	41 of 100 (Notable)
Haverhill	United States	Record daily precipitation	64.8 mm (2.6 in)	41 of 100 (Notable)
Windham 3 E	United States	Record daily precipitation	25.1 mm (1.0 in)	41 of 100 (Notable)
Saskatoon Diefenbaker Int'l A	Canada	Record high minimum temperature	14.8 C (58.6 F)	40 of 100 (Notable)
Brockton	United States	Record low maximum temperature	6.1 C (43.0 F)	40 of 100 (Notable)
Kukuiula 935	United States	Record daily precipitation	33.5 mm (1.3 in)	40 of 100 (Notable)
Brunswick NAS	United States	Record daily precipitation	43.2 mm (1.7 in)	40 of 100 (Notable)
Ajana	Australia	Record daily precipitation	29.0 mm (1.1 in)	39 of 100 (Notable)
Santa Cruz (Cruz de Malta)	Brazil	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)

Counts by Type and Timescale

1,075 records

Records set or tied on 10 May 1977 by type: Highest daily maximum 165, Lowest daily maximum 145, Highest daily minimum 284, Lowest daily minimum 102, Heaviest daily rainfall 312, Heaviest daily snowfall 56, Deepest snow cover 11.

Records on 10 May 1977 by type
Record type	Records
Highest daily maximum	165
Lowest daily maximum	145
Highest daily minimum	284
Lowest daily minimum	102
Heaviest daily rainfall	312
Heaviest daily snowfall	56
Deepest snow cover	11

Records on 10 May 1977 by timescale: all-time 0, monthly 68, daily 1,007.

How Much Records Were Beaten By

924 broken records

Margins by which the 924 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 280.0. Ties are not counted.

Top 20 by Significance

10 May 1977

Top 20 records on 10 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 May 1977	Alliance, CA	monthly rain	67.1 mm (2.6 in)	32.0 mm (1.3 in)	55 years	72 of 100 (Major)
10 May 1977	Boylston, US	monthly snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	60 years	71 of 100 (Major)
10 May 1977	New Salem, US	monthly snowfall	14.0 cm (5.5 in)	14.0 cm (5.5 in)	80 years	70 of 100 (Major)
10 May 1977	Franklin, US	monthly snowfall	20.3 cm (8.0 in)	20.3 cm (8.0 in)	48 years	69 of 100 (Major)
10 May 1977	Chesterfield, US	monthly snowfall	30.5 cm (12.0 in)	20.3 cm (8.0 in)	32 years	64 of 100 (Major)
10 May 1977	Gardner, US	monthly snowfall	30.5 cm (12.0 in)	22.9 cm (9.0 in)	32 years	63 of 100 (Major)
10 May 1977	Blue Hill Coop, US	monthly snow depth	20.3 cm (8.0 in)	20.3 cm (8.0 in)	82 years	62 of 100 (Major)
10 May 1977	Milford, US	monthly snowfall	17.8 cm (7.0 in)	17.8 cm (7.0 in)	46 years	62 of 100 (Major)
10 May 1977	Ashburnham, US	monthly snowfall	25.9 cm (10.2 in)	21.8 cm (8.6 in)	10 years	60 of 100 (Major)
10 May 1977	Blue Hill Coop, US	monthly snowfall	19.8 cm (7.8 in)	12.2 cm (4.8 in)	60 years	60 of 100 (Major)
10 May 1977	Southbridge 3 SW, US	monthly snowfall	15.2 cm (6.0 in)	15.2 cm (6.0 in)	48 years	59 of 100 (Notable)
10 May 1977	Ranfurly, CA	daily rain	39.9 mm (1.6 in)	24.9 mm (1.0 in)	40 years	57 of 100 (Notable)
10 May 1977	Framingham, US	monthly snowfall	12.7 cm (5.0 in)	12.7 cm (5.0 in)	47 years	57 of 100 (Notable)
10 May 1977	Lawrence, US	daily rain	82.3 mm (3.2 in)	51.8 mm (2.0 in)	32 years	57 of 100 (Notable)
10 May 1977	Chestnut Hill, US	monthly snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	77 years	56 of 100 (Notable)
10 May 1977	Sterling, US	monthly snowfall	8.9 cm (3.5 in)	8.9 cm (3.5 in)	70 years	56 of 100 (Notable)
10 May 1977	Guna, IN	daily rain	55.1 mm (2.2 in)	52.3 mm (2.1 in)	39 years	55 of 100 (Notable)
10 May 1977	Ft Bidwell, US	daily rain	32.3 mm (1.3 in)	13.8 mm (0.5 in)	62 years	55 of 100 (Notable)
10 May 1977	Hardwick, US	monthly snowfall	35.6 cm (14.0 in)	28.0 cm (11.0 in)	0 years	55 of 100 (Notable)
10 May 1977	Claremont Pomona Clg, US	daily rain	31.2 mm (1.2 in)	18.0 mm (0.7 in)	76 years	54 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

1805 to 1977

Records set or tied on this calendar date in each year from 1805 to 1977. 1977 had 1,075 records.

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

Records on 05-10 in each year
Year	Records
1805	1
1814	2
1832	1
1834	1
1836	4
1838	1
1843	1
1846	1
1848	1
1855	2
1858	1
1860	1
1861	2
1867	3
1868	1
1869	1
1872	1
1874	4
1876	1
1878	1
1879	2
1880	3
1881	3
1883	1
1884	2
1885	2
1886	1
1887	1
1888	2
1889	4
1890	2
1891	2
1893	1
1895	4
1896	6
1897	4
1898	5
1900	4
1901	6
1902	18
1903	6
1904	7
1905	21
1906	42
1907	33
1908	10
1909	17
1910	21
1911	55
1912	15
1913	23
1914	17
1915	18
1916	26
1917	23
1918	105
1919	145
1920	54
1921	143
1922	38
1923	291
1924	198
1925	163
1926	291
1927	296
1928	189
1929	102
1930	647
1931	277
1932	145
1933	516
1934	412
1935	200
1936	439
1937	148
1938	179
1939	179
1940	317
1941	257
1942	237
1943	482
1944	200
1945	646
1946	455
1947	820
1948	491
1949	492
1950	356
1951	281
1952	342
1953	627
1954	554
1955	272
1956	669
1957	374
1958	338
1959	192
1960	660
1961	722
1962	593
1963	951
1964	259
1965	413
1966	1,290
1967	932
1968	861
1969	325
1970	555
1971	416
1972	573
1973	429
1974	608
1975	448
1976	672
1977	1,075
1978	815
1979	1,927
1980	865
1981	1,213
1982	671
1983	753
1984	635
1985	925
1986	669
1987	1,270
1988	490
1989	1,365
1990	1,071
1991	854
1992	875
1993	1,056
1994	622
1995	1,129
1996	1,469
1997	1,215
1998	1,268
1999	1,299
2000	1,036
2001	842
2002	867
2003	1,688
2004	735
2005	761
2006	879
2007	815
2008	877
2009	651
2010	855
2011	1,288
2012	1,054
2013	635
2014	506
2015	943
2016	815
2017	702
2018	923
2019	1,254
2020	1,346
2021	635
2022	1,346
2023	359
2024	622
2025	1,094
2026	496

Download the Data

Data for records on 1977-05-10: 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	883
50 to 100	22
100 to 150	9
150 to 200	4
200 to 250	5
250 to 300	1