Weather Records on 9 May 1971

338 weather records were set or tied worldwide on 9 May 1971. Highest significance: Isfjord Radio, NO.

Key Facts for 9 May 1971

On 9 May 1971, 338 weather records were set or tied at long-record stations worldwide.
88 were record highs and 65 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 331 daily.
Isfjord Radio set a monthly record daily precipitation of 33.1 mm (1.3 in) on 9 May 1971.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 433 records.

Record Map

338 stations

338 station records on 9 May 1971 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 1971: highest significance records shown on the map
Station	Country	Type	Value	Significance
Isfjord Radio	Norway	Record daily precipitation	33.1 mm (1.3 in)	57 of 100 (Notable)
Union Springs 9 S	United States	Record daily precipitation	77.5 mm (3.1 in)	50 of 100 (Notable)
Telluride 4WNW	United States	Record snow depth	15.2 cm (6.0 in)	48 of 100 (Notable)
Leroy 5 WSW	United States	Record daily precipitation	47.0 mm (1.9 in)	46 of 100 (Notable)
Milledgeville	United States	Record daily precipitation	69.1 mm (2.7 in)	45 of 100 (Notable)
Zaporoz'e	Ukraine	Record daily precipitation	38.5 mm (1.5 in)	42 of 100 (Notable)
Carlyle	Canada	Record daily precipitation	63.5 mm (2.5 in)	41 of 100 (Notable)
Custer	United States	Record daily precipitation	35.6 mm (1.4 in)	41 of 100 (Notable)
Bainbridge	United States	Record daily precipitation	52.3 mm (2.1 in)	39 of 100 (Notable)
Camilla 3SE	United States	Record daily precipitation	48.0 mm (1.9 in)	38 of 100 (Notable)
Volnovakha	Ukraine	Record daily precipitation	28.3 mm (1.1 in)	35 of 100 (Notable)
Thomasville 7 NE	United States	Record daily precipitation	36.8 mm (1.4 in)	35 of 100 (Notable)
Mundau	Brazil	Record daily precipitation	93.5 mm (3.7 in)	34 of 100 (Routine)
Midville	United States	Record daily precipitation	50.0 mm (2.0 in)	31 of 100 (Routine)
Cheraw	United States	Record daily precipitation	36.1 mm (1.4 in)	31 of 100 (Routine)
Pindamonhangaba (Pcd)	Brazil	Record daily precipitation	25.0 mm (1.0 in)	30 of 100 (Routine)
Crested Butte	United States	Record daily snowfall	15.2 cm (6.0 in)	29 of 100 (Routine)
Blakely	United States	Record daily precipitation	53.3 mm (2.1 in)	29 of 100 (Routine)
Lampasas	United States	Record daily precipitation	58.4 mm (2.3 in)	29 of 100 (Routine)
Kohala Mis 175.1	United States	Record low minimum temperature	16.1 C (61.0 F)	29 of 100 (Routine)
Big Trout Lake	Canada	Record high maximum temperature	25.0 C (77.0 F)	28 of 100 (Routine)
Sitka Magnetic Obsy	United States	Record low minimum temperature	-2.8 C (27.0 F)	28 of 100 (Routine)
Jua	Brazil	Record daily precipitation	59.8 mm (2.4 in)	27 of 100 (Routine)
Zugspitze	Germany	Record high maximum temperature	7.8 C (46.0 F)	27 of 100 (Routine)
Hamburg Fuhlsbuettel	Germany	Record high minimum temperature	13.6 C (56.5 F)	27 of 100 (Routine)
San Saba	United States	Record daily precipitation	35.6 mm (1.4 in)	27 of 100 (Routine)
Concordia ASOS	United States	Record daily precipitation	32.5 mm (1.3 in)	27 of 100 (Routine)
Ibiuna	Brazil	Record daily precipitation	27.1 mm (1.1 in)	26 of 100 (Routine)
Pixore de Baixo	Brazil	Record daily precipitation	30.2 mm (1.2 in)	26 of 100 (Routine)
Titusville	United States	Record high maximum temperature	36.7 C (98.1 F)	26 of 100 (Routine)
Grenfell	Canada	Record high minimum temperature	11.1 C (52.0 F)	25 of 100 (Routine)
Tillabery	Niger	Record low maximum temperature	36.2 C (97.2 F)	25 of 100 (Routine)
Troy	United States	Record daily precipitation	117.3 mm (4.6 in)	25 of 100 (Routine)
Arteaga	Mexico	Record low minimum temperature	7.2 C (45.0 F)	24 of 100 (Routine)
Ponte Alta 1	Brazil	Record daily precipitation	32.2 mm (1.3 in)	23 of 100 (Routine)
East Park Rsvr	United States	Record low maximum temperature	12.2 C (54.0 F)	23 of 100 (Routine)
Nikopol	Ukraine	Record daily precipitation	26.4 mm (1.0 in)	22 of 100 (Routine)
Brownsville	United States	Record high minimum temperature	25.6 C (78.1 F)	22 of 100 (Routine)
Mineirolandia	Brazil	Record daily precipitation	41.0 mm (1.6 in)	21 of 100 (Routine)
Lugano	Switzerland	Record high minimum temperature	14.6 C (58.3 F)	21 of 100 (Routine)
Clayton	United States	Record daily precipitation	50.8 mm (2.0 in)	21 of 100 (Routine)
Peterboro 2 S	United States	Record low maximum temperature	8.3 C (46.9 F)	21 of 100 (Routine)
Roy	United States	Record low minimum temperature	-0.6 C (30.9 F)	21 of 100 (Routine)
Ketchikan AP	United States	Record low minimum temperature	-2.2 C (28.0 F)	21 of 100 (Routine)
Minnedosa	Canada	Record daily precipitation	16.0 mm (0.6 in)	20 of 100 (Routine)
Paul 1ENE	United States	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Delta	United States	Record daily precipitation	7.9 mm (0.31 in)	20 of 100 (Routine)
Northville	United States	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Palisade	United States	Record daily precipitation	12.2 mm (0.5 in)	20 of 100 (Routine)
Monroe 2 SE	United States	Record daily precipitation	23.1 mm (0.9 in)	20 of 100 (Routine)
Usina Do Chicao	Brazil	Record daily precipitation	24.5 mm (1.0 in)	20 of 100 (Routine)
Cedaredge	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Fruita	United States	Record daily precipitation	13.0 mm (0.5 in)	20 of 100 (Routine)
Rangely 1E	United States	Record daily precipitation	9.9 mm (0.39 in)	20 of 100 (Routine)
Amvrosiivka	Ukraine	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Kranshoek	South Africa	Record daily precipitation	7.0 mm (0.28 in)	20 of 100 (Routine)
Cochetopa Creek	United States	Record daily snowfall	2.5 cm (1.0 in)	20 of 100 (Routine)
Barkestad	Norway	Record daily precipitation	23.7 mm (0.9 in)	20 of 100 (Routine)
Gunnison 3SW	United States	Record daily precipitation	6.4 mm (0.25 in)	20 of 100 (Routine)
Gloversville	United States	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)

Counts by Type and Timescale

338 records

Records set or tied on 9 May 1971 by type: Highest daily maximum 38, Lowest daily maximum 40, Highest daily minimum 50, Lowest daily minimum 25, Heaviest daily rainfall 174, Heaviest daily snowfall 6, Deepest snow cover 5.

Records on 9 May 1971 by type
Record type	Records
Highest daily maximum	38
Lowest daily maximum	40
Highest daily minimum	50
Lowest daily minimum	25
Heaviest daily rainfall	174
Heaviest daily snowfall	6
Deepest snow cover	5

Records on 9 May 1971 by timescale: all-time 0, monthly 7, daily 331.

How Much Records Were Beaten By

276 broken records

Margins by which the 276 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.

Top 20 by Significance

9 May 1971

Top 20 records on 9 May 1971 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 1971	Isfjord Radio, NO	monthly rain	33.1 mm (1.3 in)	17.5 mm (0.7 in)	13 years	57 of 100 (Notable)
9 May 1971	Union Springs 9 S, US	daily rain	77.5 mm (3.1 in)	39.4 mm (1.6 in)	64 years	50 of 100 (Notable)
9 May 1971	Telluride 4WNW, US	daily snow depth	15.2 cm (6.0 in)	12.7 cm (5.0 in)	53 years	48 of 100 (Notable)
9 May 1971	Leroy 5 WSW, US	daily rain	47.0 mm (1.9 in)	21.1 mm (0.8 in)	52 years	46 of 100 (Notable)
9 May 1971	Milledgeville, US	daily rain	69.1 mm (2.7 in)	30.0 mm (1.2 in)	64 years	45 of 100 (Notable)
9 May 1971	Zaporoz'e, UA	daily rain	38.5 mm (1.5 in)	22.3 mm (0.9 in)	9 years	42 of 100 (Notable)
9 May 1971	Carlyle, CA	monthly rain	63.5 mm (2.5 in)	19.0 mm (0.7 in)	0 years	41 of 100 (Notable)
9 May 1971	Custer, US	daily rain	35.6 mm (1.4 in)	23.4 mm (0.9 in)	48 years	41 of 100 (Notable)
9 May 1971	Bainbridge, US	daily rain	52.3 mm (2.1 in)	20.5 mm (0.8 in)	60 years	39 of 100 (Notable)
9 May 1971	Camilla 3SE, US	daily rain	48.0 mm (1.9 in)	29.2 mm (1.1 in)	32 years	38 of 100 (Notable)
9 May 1971	Volnovakha, UA	daily rain	28.3 mm (1.1 in)	19.5 mm (0.8 in)	8 years	35 of 100 (Notable)
9 May 1971	Thomasville 7 NE, US	daily rain	36.8 mm (1.4 in)	15.0 mm (0.6 in)	56 years	35 of 100 (Notable)
9 May 1971	Mundau, BR	daily rain	93.5 mm (3.7 in)	46.5 mm (1.8 in)	4 years	34 of 100 (Routine)
9 May 1971	Midville, US	daily rain	50.0 mm (2.0 in)	33.5 mm (1.3 in)	21 years	31 of 100 (Routine)
9 May 1971	Cheraw, US	daily rain	36.1 mm (1.4 in)	7.7 mm (0.30 in)	60 years	31 of 100 (Routine)
9 May 1971	Pindamonhangaba (Pcd), BR	daily rain	25.0 mm (1.0 in)	16.8 mm (0.7 in)	32 years	30 of 100 (Routine)
9 May 1971	Crested Butte, US	daily snowfall	15.2 cm (6.0 in)	7.6 cm (3.0 in)	37 years	29 of 100 (Routine)
9 May 1971	Blakely, US	daily rain	53.3 mm (2.1 in)	30.7 mm (1.2 in)	9 years	29 of 100 (Routine)
9 May 1971	Lampasas, US	daily rain	58.4 mm (2.3 in)	18.8 mm (0.7 in)	38 years	29 of 100 (Routine)
9 May 1971	Kohala Mis 175.1, US	daily low min	16.1 C (61.0 F)	0.6 C (1.1 F)	60 years	29 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

1793 to 1971

Records set or tied on this calendar date in each year from 1793 to 1971. 1971 had 338 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 1971-05-09: 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 20	253
20 to 40	17
40 to 60	4
60 to 80	1
80 to 100	0
100 to 120	0
120 to 140	1