Weather Records on 17 May 1970

711 weather records were set or tied worldwide on 17 May 1970. Highest significance: Kjahta, RU.

Key Facts for 17 May 1970

On 17 May 1970, 711 weather records were set or tied at long-record stations worldwide.
373 were record highs and 134 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 702 daily.
Kjahta set a daily record precipitation of 47.5 mm (1.9 in) on 17 May 1970.
Across 167 earlier years (1802 to 2026) the same calendar date averaged 433 records.

Record Map

711 stations

711 station records on 17 May 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 May 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kjahta	Russia	Record daily precipitation	47.5 mm (1.9 in)	63 of 100 (Major)
Taganrog (Lighthouse)	Russia	Record daily precipitation	37.5 mm (1.5 in)	53 of 100 (Notable)
Saint John	Canada	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Johnstown	United States	Record daily precipitation	43.2 mm (1.7 in)	47 of 100 (Notable)
Highmarket 2W	United States	Record daily precipitation	53.8 mm (2.1 in)	46 of 100 (Notable)
Elkin	United States	Record daily precipitation	51.6 mm (2.0 in)	43 of 100 (Notable)
Musquash	Canada	Record daily precipitation	56.9 mm (2.2 in)	42 of 100 (Notable)
Darjeeling	India	Record daily precipitation	60.0 mm (2.4 in)	42 of 100 (Notable)
Brocken	Germany	Record snow depth	130.0 cm (51.2 in)	41 of 100 (Notable)
Sumrall	United States	Record daily precipitation	57.2 mm (2.3 in)	41 of 100 (Notable)
Schwabisch Hall-Bibersfeld	Germany	Record daily precipitation	33.4 mm (1.3 in)	38 of 100 (Notable)
New Iberia AP - Acadiana Rgnl	United States	Record low maximum temperature	21.7 C (71.1 F)	37 of 100 (Notable)
Cumberland	United States	Record daily precipitation	26.7 mm (1.1 in)	37 of 100 (Notable)
Freehold-Marlboro	United States	Record low maximum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Hooker 12 NNW	United States	Record daily precipitation	43.7 mm (1.7 in)	37 of 100 (Notable)
Lyons Falls	United States	Record daily precipitation	35.6 mm (1.4 in)	37 of 100 (Notable)
Beckley Va Hospital	United States	Record daily precipitation	33.8 mm (1.3 in)	37 of 100 (Notable)
Sacramento 5 ESE	United States	Record high minimum temperature	19.4 C (66.9 F)	37 of 100 (Notable)
Porthill	United States	Record high minimum temperature	13.9 C (57.0 F)	36 of 100 (Notable)
Jennings	United States	Record low maximum temperature	19.4 C (66.9 F)	36 of 100 (Notable)
McAdam	Canada	Record daily precipitation	44.2 mm (1.7 in)	35 of 100 (Notable)
Browning	United States	Record high minimum temperature	13.9 C (57.0 F)	35 of 100 (Notable)
Allegany Sp	United States	Record daily precipitation	37.3 mm (1.5 in)	35 of 100 (Notable)
Bolivar	United States	Record daily precipitation	27.4 mm (1.1 in)	35 of 100 (Notable)
Monroe 2 SE	United States	Record daily precipitation	26.4 mm (1.0 in)	35 of 100 (Notable)
Vale	United States	Record high minimum temperature	15.0 C (59.0 F)	35 of 100 (Notable)
Waynesboro 2 S	United States	Record daily precipitation	29.0 mm (1.1 in)	34 of 100 (Routine)
Franklinville	United States	Record daily precipitation	35.6 mm (1.4 in)	34 of 100 (Routine)
Setauket Strong	United States	Record daily precipitation	40.4 mm (1.6 in)	34 of 100 (Routine)
Millers Creek	Australia	Record daily precipitation	28.7 mm (1.1 in)	33 of 100 (Routine)
Locke 2 W	United States	Record daily precipitation	34.0 mm (1.3 in)	33 of 100 (Routine)
Buffalo Mills	United States	Record daily precipitation	43.2 mm (1.7 in)	33 of 100 (Routine)
Buena Vista	United States	Record daily precipitation	26.7 mm (1.1 in)	33 of 100 (Routine)
Brownsville	United States	Record low minimum temperature	12.8 C (55.0 F)	33 of 100 (Routine)
Fort Qu'appelle	Canada	Record high minimum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
El Cuchillo	Mexico	Record low minimum temperature	11.1 C (52.0 F)	32 of 100 (Routine)
Beaver Falls	United States	Record daily precipitation	26.9 mm (1.1 in)	32 of 100 (Routine)
Skaneateles	United States	Record daily precipitation	30.7 mm (1.2 in)	32 of 100 (Routine)
Ridgway	United States	Record daily precipitation	41.1 mm (1.6 in)	32 of 100 (Routine)
Appomattox	United States	Record daily precipitation	29.7 mm (1.2 in)	32 of 100 (Routine)
Charlottesville 2W	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Astana	Kazakhstan	Record high minimum temperature	14.1 C (57.4 F)	31 of 100 (Routine)
Poughkeepsie	United States	Record daily precipitation	31.8 mm (1.3 in)	31 of 100 (Routine)
Bradford Cntrl Fs	United States	Record daily precipitation	35.6 mm (1.4 in)	31 of 100 (Routine)
Castle Dale	United States	Record high maximum temperature	32.2 C (90.0 F)	31 of 100 (Routine)
Denton 2 E	United States	Record low maximum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Rio Grande City	United States	Record low minimum temperature	10.0 C (50.0 F)	30 of 100 (Routine)
Newport	United States	Record daily precipitation	36.3 mm (1.4 in)	30 of 100 (Routine)
Charlottesville 2W	United States	Record low maximum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Rocklin	United States	Record high minimum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Vacaville	United States	Record high minimum temperature	16.7 C (62.1 F)	29 of 100 (Routine)
Brewerton Lock 23	United States	Record daily precipitation	28.7 mm (1.1 in)	29 of 100 (Routine)
Jamestown State Hosp	United States	Record high maximum temperature	32.8 C (91.0 F)	29 of 100 (Routine)
Gaston Shoals	United States	Record daily precipitation	41.9 mm (1.6 in)	29 of 100 (Routine)
Alice	United States	Record low maximum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Deseret	United States	Record high maximum temperature	32.8 C (91.0 F)	29 of 100 (Routine)
Escalante	United States	Record high maximum temperature	32.2 C (90.0 F)	29 of 100 (Routine)
Eagle	United States	Record low minimum temperature	-6.7 C (19.9 F)	29 of 100 (Routine)
Kabansk	Russia	Record daily precipitation	35.8 mm (1.4 in)	28 of 100 (Routine)
Ft Bayard 4W	United States	Record high maximum temperature	32.2 C (90.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

711 records

Records set or tied on 17 May 1970 by type: Highest daily maximum 263, Lowest daily maximum 54, Highest daily minimum 110, Lowest daily minimum 80, Heaviest daily rainfall 200, Heaviest daily snowfall 2, Deepest snow cover 2.

Records on 17 May 1970 by type
Record type	Records
Highest daily maximum	263
Lowest daily maximum	54
Highest daily minimum	110
Lowest daily minimum	80
Heaviest daily rainfall	200
Heaviest daily snowfall	2
Deepest snow cover	2

Records on 17 May 1970 by timescale: all-time 0, monthly 9, daily 702.

How Much Records Were Beaten By

534 broken records

Margins by which the 534 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1020.0. Ties are not counted.

Top 20 by Significance

17 May 1970

Top 20 records on 17 May 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 May 1970	Kjahta, RU	daily rain	47.5 mm (1.9 in)	32.0 mm (1.3 in)	56 years	63 of 100 (Major)
17 May 1970	Taganrog (Lighthouse), RU	daily rain	37.5 mm (1.5 in)	24.5 mm (1.0 in)	36 years	53 of 100 (Notable)
17 May 1970	Saint John, CA	daily rain	43.2 mm (1.7 in)	11.2 mm (0.4 in)	88 years	47 of 100 (Notable)
17 May 1970	Johnstown, US	daily rain	43.2 mm (1.7 in)	15.8 mm (0.6 in)	76 years	47 of 100 (Notable)
17 May 1970	Highmarket 2W, US	daily rain	53.8 mm (2.1 in)	33.0 mm (1.3 in)	28 years	46 of 100 (Notable)
17 May 1970	Elkin, US	daily rain	51.6 mm (2.0 in)	43.2 mm (1.7 in)	8 years	43 of 100 (Notable)
17 May 1970	Musquash, CA	daily rain	56.9 mm (2.2 in)	31.2 mm (1.2 in)	27 years	42 of 100 (Notable)
17 May 1970	Darjeeling, IN	daily rain	60.0 mm (2.4 in)	31.0 mm (1.2 in)	32 years	42 of 100 (Notable)
17 May 1970	Brocken, DE	daily snow depth	130.0 cm (51.2 in)	102.0 cm (40.2 in)	3 years	41 of 100 (Notable)
17 May 1970	Sumrall, US	daily rain	57.2 mm (2.3 in)	54.7 mm (2.2 in)	24 years	41 of 100 (Notable)
17 May 1970	Schwabisch Hall-Bibersfeld, DE	daily rain	33.4 mm (1.3 in)	17.4 mm (0.7 in)	15 years	38 of 100 (Notable)
17 May 1970	New Iberia AP - Acadiana Rgnl, US	daily low max	21.7 C (71.1 F)	2.7 C (4.9 F)	65 years	37 of 100 (Notable)
17 May 1970	Cumberland, US	daily rain	26.7 mm (1.1 in)	8.2 mm (0.32 in)	70 years	37 of 100 (Notable)
17 May 1970	Freehold-Marlboro, US	daily low max	15.6 C (60.1 F)	1.1 C (2.0 F)	86 years	37 of 100 (Notable)
17 May 1970	Hooker 12 NNW, US	daily rain	43.7 mm (1.7 in)	19.6 mm (0.8 in)	32 years	37 of 100 (Notable)
17 May 1970	Lyons Falls, US	daily rain	35.6 mm (1.4 in)	25.4 mm (1.0 in)	16 years	37 of 100 (Notable)
17 May 1970	Beckley Va Hospital, US	daily rain	33.8 mm (1.3 in)	12.7 mm (0.5 in)	56 years	37 of 100 (Notable)
17 May 1970	Sacramento 5 ESE, US	daily high min	19.4 C (66.9 F)	1.6 C (2.9 F)	79 years	37 of 100 (Notable)
17 May 1970	Porthill, US	daily high min	13.9 C (57.0 F)	3.3 C (5.9 F)	68 years	36 of 100 (Notable)
17 May 1970	Jennings, US	daily low max	19.4 C (66.9 F)	5.0 C (9.0 F)	37 years	36 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 1970

Records set or tied on this calendar date in each year from 1802 to 1970. 1970 had 711 records.

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

Records on 05-17 in each year
Year	Records
1802	2
1803	1
1808	1
1816	1
1834	1
1837	1
1839	1
1847	2
1848	1
1851	1
1853	1
1855	1
1858	1
1859	1
1861	2
1862	2
1863	2
1864	1
1871	2
1872	2
1873	2
1874	4
1877	1
1878	1
1879	2
1880	1
1881	1
1882	2
1883	3
1885	1
1887	1
1888	2
1889	3
1891	8
1892	4
1893	3
1895	8
1896	2
1897	3
1898	6
1899	7
1900	12
1901	2
1902	3
1903	9
1904	12
1905	10
1906	22
1907	10
1908	5
1909	33
1910	16
1911	30
1912	16
1913	24
1914	24
1915	53
1916	49
1917	18
1918	56
1919	35
1920	46
1921	50
1922	30
1923	95
1924	80
1925	326
1926	133
1927	264
1928	127
1929	168
1930	421
1931	201
1932	288
1933	365
1934	373
1935	341
1936	270
1937	183
1938	340
1939	285
1940	338
1941	408
1942	589
1943	855
1944	521
1945	799
1946	586
1947	249
1948	412
1949	544
1950	371
1951	373
1952	777
1953	441
1954	298
1955	570
1956	1,166
1957	469
1958	331
1959	488
1960	402
1961	291
1962	1,325
1963	368
1964	417
1965	462
1966	489
1967	644
1968	564
1969	638
1970	711
1971	723
1972	610
1973	1,016
1974	1,302
1975	365
1976	426
1977	1,078
1978	872
1979	459
1980	768
1981	940
1982	476
1983	1,326
1984	925
1985	561
1986	921
1987	1,054
1988	1,096
1989	1,307
1990	1,135
1991	1,237
1992	1,025
1993	495
1994	858
1995	1,734
1996	1,706
1997	1,619
1998	1,080
1999	795
2000	825
2001	960
2002	964
2003	1,127
2004	769
2005	784
2006	1,522
2007	742
2008	1,309
2009	1,050
2010	880
2011	1,483
2012	711
2013	739
2014	1,062
2015	824
2016	741
2017	1,302
2018	726
2019	686
2020	496
2021	443
2022	479
2023	385
2024	566
2025	928
2026	745

Download the Data

Data for records on 1970-05-17: 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 200	533
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	1