Weather Records on 15 May 1970

512 weather records were set or tied worldwide on 15 May 1970. Highest significance: Hondo, US.

Key Facts for 15 May 1970

On 15 May 1970, 512 weather records were set or tied at long-record stations worldwide.
149 were record highs and 122 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 491 daily.
Hondo set a daily record precipitation of 212.9 mm (8.4 in) on 15 May 1970.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 430 records.

Record Map

512 stations

512 station records on 15 May 1970 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1970: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hondo	United States	Record daily precipitation	212.9 mm (8.4 in)	67 of 100 (Major)
Lucan	Canada	Record daily precipitation	82.8 mm (3.3 in)	64 of 100 (Major)
Fredericksburg	United States	Record daily precipitation	175.3 mm (6.9 in)	64 of 100 (Major)
Llano	United States	Record daily precipitation	86.9 mm (3.4 in)	63 of 100 (Major)
Tamenlong	India	Record daily precipitation	200.0 mm (7.9 in)	57 of 100 (Notable)
Eldorado	United States	Record daily precipitation	73.7 mm (2.9 in)	56 of 100 (Notable)
Lakeside	United States	Record daily precipitation	91.4 mm (3.6 in)	55 of 100 (Notable)
Griggsville	United States	Record daily precipitation	88.9 mm (3.5 in)	53 of 100 (Notable)
Harrisonville	United States	Record daily precipitation	63.5 mm (2.5 in)	51 of 100 (Notable)
Bella Coola	Canada	Record daily precipitation	56.6 mm (2.2 in)	50 of 100 (Notable)
Fowlerton	United States	Record daily precipitation	86.1 mm (3.4 in)	50 of 100 (Notable)
San Saba	United States	Record daily precipitation	77.2 mm (3.0 in)	50 of 100 (Notable)
San Marcos	United States	Record daily precipitation	187.2 mm (7.4 in)	48 of 100 (Notable)
Eden	United States	Record daily precipitation	74.2 mm (2.9 in)	44 of 100 (Notable)
Bumberry	Australia	Record daily precipitation	45.2 mm (1.8 in)	42 of 100 (Notable)
Kenora A	Canada	Record daily snowfall	20.6 cm (8.1 in)	42 of 100 (Notable)
Brocken	Germany	Record snow depth	140.0 cm (55.1 in)	42 of 100 (Notable)
San Bernardino F S 226	United States	Record high minimum temperature	17.8 C (64.0 F)	42 of 100 (Notable)
Walnut 4S	United States	Record daily precipitation	52.6 mm (2.1 in)	42 of 100 (Notable)
Wateree Dam	United States	Record daily precipitation	54.6 mm (2.1 in)	42 of 100 (Notable)
Beaumont #2	United States	Record high minimum temperature	20.0 C (68.0 F)	41 of 100 (Notable)
Trundle (Murrumbogie)	Australia	Record daily precipitation	33.0 mm (1.3 in)	40 of 100 (Notable)
Trundle (Brookview St)	Australia	Record daily precipitation	36.1 mm (1.4 in)	40 of 100 (Notable)
Kenora A	Canada	Record daily precipitation	32.3 mm (1.3 in)	40 of 100 (Notable)
Oswego 1 N	United States	Record daily precipitation	55.9 mm (2.2 in)	40 of 100 (Notable)
Pearsall	United States	Record daily precipitation	77.0 mm (3.0 in)	40 of 100 (Notable)
Parsons 2 NW	United States	Record daily precipitation	73.7 mm (2.9 in)	39 of 100 (Notable)
Louisiana Starks Nurse	United States	Record daily precipitation	72.4 mm (2.9 in)	39 of 100 (Notable)
Forbes (Camp Street)	Australia	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Olathe 3E	United States	Record daily precipitation	45.5 mm (1.8 in)	38 of 100 (Notable)
Fulton	United States	Record daily precipitation	80.8 mm (3.2 in)	38 of 100 (Notable)
Burnet	United States	Record daily precipitation	62.2 mm (2.4 in)	38 of 100 (Notable)
Kerrville	United States	Record daily precipitation	125.2 mm (4.9 in)	38 of 100 (Notable)
Greenville Wtp	United States	Record daily precipitation	49.8 mm (2.0 in)	37 of 100 (Notable)
Corona	United States	Record high minimum temperature	20.6 C (69.1 F)	35 of 100 (Notable)
Eldon	United States	Record daily precipitation	62.5 mm (2.5 in)	35 of 100 (Notable)
Floresville	United States	Record daily precipitation	80.0 mm (3.1 in)	35 of 100 (Notable)
Bogan Gate Post Office	Australia	Record daily precipitation	33.5 mm (1.3 in)	34 of 100 (Routine)
Port Blair	India	Record daily precipitation	132.5 mm (5.2 in)	34 of 100 (Routine)
Stover	United States	Record daily precipitation	64.5 mm (2.5 in)	34 of 100 (Routine)
Blanco	United States	Record daily precipitation	41.9 mm (1.6 in)	34 of 100 (Routine)
Georgetown	United States	Record daily precipitation	50.8 mm (2.0 in)	34 of 100 (Routine)
Corryong (Parish Lane)	Australia	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Bull Harbour	Canada	Record daily precipitation	41.7 mm (1.6 in)	33 of 100 (Routine)
Wahlsburg-Lippoldsberg	Germany	Record daily precipitation	30.3 mm (1.2 in)	33 of 100 (Routine)
Claremont Pomona Clg	United States	Record high minimum temperature	15.6 C (60.1 F)	33 of 100 (Routine)
Riverside Fire STN 3	United States	Record high minimum temperature	15.0 C (59.0 F)	33 of 100 (Routine)
Ft Scott	United States	Record daily precipitation	46.7 mm (1.8 in)	33 of 100 (Routine)
Manildra (George St)	Australia	Record daily precipitation	28.7 mm (1.1 in)	32 of 100 (Routine)
Berkeley	United States	Record high minimum temperature	17.2 C (63.0 F)	32 of 100 (Routine)
Decorah	United States	Record low maximum temperature	11.1 C (52.0 F)	32 of 100 (Routine)
Mineral Ridge Wtr Wks	United States	Record daily precipitation	49.0 mm (1.9 in)	32 of 100 (Routine)
Hollow	United States	Record daily precipitation	91.4 mm (3.6 in)	32 of 100 (Routine)
Cookeys Plains	Australia	Record daily precipitation	41.1 mm (1.6 in)	31 of 100 (Routine)
Warsaw 1	United States	Record daily precipitation	59.7 mm (2.4 in)	31 of 100 (Routine)
Bucyrus	United States	Record daily precipitation	27.7 mm (1.1 in)	31 of 100 (Routine)
Boerne	United States	Record daily precipitation	78.0 mm (3.1 in)	31 of 100 (Routine)
Goldthwaite 1 WSW	United States	Record daily precipitation	65.0 mm (2.6 in)	31 of 100 (Routine)
Rockley Post Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	30 of 100 (Routine)
Garnett 1 E	United States	Record daily precipitation	37.8 mm (1.5 in)	30 of 100 (Routine)

Counts by Type and Timescale

512 records

Records set or tied on 15 May 1970 by type: Highest daily maximum 89, Lowest daily maximum 64, Highest daily minimum 60, Lowest daily minimum 58, Heaviest daily rainfall 235, Heaviest daily snowfall 4, Deepest snow cover 2.

Records on 15 May 1970 by type
Record type	Records
Highest daily maximum	89
Lowest daily maximum	64
Highest daily minimum	60
Lowest daily minimum	58
Heaviest daily rainfall	235
Heaviest daily snowfall	4
Deepest snow cover	2

Records on 15 May 1970 by timescale: all-time 0, monthly 21, daily 491.

How Much Records Were Beaten By

428 broken records

Margins by which the 428 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1050.0. Ties are not counted.

Top 20 by Significance

15 May 1970

Top 20 records on 15 May 1970 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1970	Hondo, US	daily rain	212.9 mm (8.4 in)	186.0 mm (7.3 in)	69 years	67 of 100 (Major)
15 May 1970	Lucan, CA	monthly rain	82.8 mm (3.3 in)	28.2 mm (1.1 in)	37 years	64 of 100 (Major)
15 May 1970	Fredericksburg, US	monthly rain	175.3 mm (6.9 in)	92.0 mm (3.6 in)	25 years	64 of 100 (Major)
15 May 1970	Llano, US	daily rain	86.9 mm (3.4 in)	61.5 mm (2.4 in)	69 years	63 of 100 (Major)
15 May 1970	Tamenlong, IN	daily rain	200.0 mm (7.9 in)	161.9 mm (6.4 in)	44 years	57 of 100 (Notable)
15 May 1970	Eldorado, US	daily rain	73.7 mm (2.9 in)	54.9 mm (2.2 in)	56 years	56 of 100 (Notable)
15 May 1970	Lakeside, US	daily rain	91.4 mm (3.6 in)	70.8 mm (2.8 in)	36 years	55 of 100 (Notable)
15 May 1970	Griggsville, US	daily rain	88.9 mm (3.5 in)	47.8 mm (1.9 in)	28 years	53 of 100 (Notable)
15 May 1970	Harrisonville, US	daily rain	63.5 mm (2.5 in)	35.6 mm (1.4 in)	60 years	51 of 100 (Notable)
15 May 1970	Bella Coola, CA	daily rain	56.6 mm (2.2 in)	23.6 mm (0.9 in)	48 years	50 of 100 (Notable)
15 May 1970	Fowlerton, US	daily rain	86.1 mm (3.4 in)	65.8 mm (2.6 in)	45 years	50 of 100 (Notable)
15 May 1970	San Saba, US	daily rain	77.2 mm (3.0 in)	67.0 mm (2.6 in)	11 years	50 of 100 (Notable)
15 May 1970	San Marcos, US	monthly rain	187.2 mm (7.4 in)	34.8 mm (1.4 in)	49 years	48 of 100 (Notable)
15 May 1970	Eden, US	daily rain	74.2 mm (2.9 in)	57.4 mm (2.3 in)	13 years	44 of 100 (Notable)
15 May 1970	Bumberry, AU	daily rain	45.2 mm (1.8 in)	17.3 mm (0.7 in)	55 years	42 of 100 (Notable)
15 May 1970	Kenora A, CA	monthly snowfall	20.6 cm (8.1 in)	8.4 cm (3.3 in)	3 years	42 of 100 (Notable)
15 May 1970	Brocken, DE	daily snow depth	140.0 cm (55.1 in)	105.0 cm (41.3 in)	3 years	42 of 100 (Notable)
15 May 1970	San Bernardino F S 226, US	monthly high min	17.8 C (64.0 F)	0.6 C (1.1 F)	76 years	42 of 100 (Notable)
15 May 1970	Walnut 4S, US	daily rain	52.6 mm (2.1 in)	33.8 mm (1.3 in)	48 years	42 of 100 (Notable)
15 May 1970	Wateree Dam, US	daily rain	54.6 mm (2.1 in)	31.7 mm (1.2 in)	32 years	42 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

1820 to 1970

Records set or tied on this calendar date in each year from 1820 to 1970. 1970 had 512 records.

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

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 1970-05-15: 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	427
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	1