Weather Records on 20 August 1937

537 weather records were set or tied worldwide on 20 August 1937. Highest significance: Ashland, US.

Key Facts for 20 August 1937

On 20 August 1937, 537 weather records were set or tied at long-record stations worldwide.
344 were record highs and 27 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 11 monthly and 524 daily.
Ashland set a daily record precipitation of 67.6 mm (2.7 in) on 20 August 1937.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 454 records.

Record Map

537 stations

537 station records on 20 August 1937 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 1937: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ashland	United States	Record daily precipitation	67.6 mm (2.7 in)	44 of 100 (Notable)
Sitka Magnetic Obsy	United States	Record daily precipitation	70.1 mm (2.8 in)	44 of 100 (Notable)
Kalamazoo State Hospital	United States	Record daily precipitation	84.8 mm (3.3 in)	43 of 100 (Notable)
Passau-Maierhof	Germany	Record daily precipitation	28.2 mm (1.1 in)	39 of 100 (Notable)
Mettupalayam	India	Record daily precipitation	47.5 mm (1.9 in)	39 of 100 (Notable)
Coldwater	United States	Record daily precipitation	94.5 mm (3.7 in)	38 of 100 (Notable)
Hoofddorp	Netherlands	Record daily precipitation	30.5 mm (1.2 in)	36 of 100 (Notable)
Wandoo Wandong	Australia	Record daily precipitation	31.5 mm (1.2 in)	35 of 100 (Notable)
Trenton 2	United States	Record high maximum temperature	35.6 C (96.1 F)	35 of 100 (Notable)
Lila Lower	Australia	Record daily precipitation	31.2 mm (1.2 in)	34 of 100 (Routine)
Lapeer 2 SE	United States	Record daily precipitation	92.2 mm (3.6 in)	34 of 100 (Routine)
Appleton City	United States	Record daily precipitation	77.2 mm (3.0 in)	34 of 100 (Routine)
Collector (Brookdale)	Australia	Record daily precipitation	27.4 mm (1.1 in)	33 of 100 (Routine)
Olathe 3E	United States	Record daily precipitation	90.7 mm (3.6 in)	33 of 100 (Routine)
Brockville	Canada	Record high minimum temperature	21.1 C (70.0 F)	32 of 100 (Routine)
Concord	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Newark Liberty Intl AP	United States	Record high maximum temperature	35.6 C (96.1 F)	32 of 100 (Routine)
Lawrence	United States	Record daily precipitation	55.9 mm (2.2 in)	31 of 100 (Routine)
Burlington	United States	Record daily precipitation	85.3 mm (3.4 in)	29 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	35.0 C (95.0 F)	29 of 100 (Routine)
Liepaja	Latvia	Record high minimum temperature	19.0 C (66.2 F)	28 of 100 (Routine)
Benson	United States	Record daily precipitation	31.0 mm (1.2 in)	28 of 100 (Routine)
Walnut	United States	Record daily precipitation	67.1 mm (2.6 in)	28 of 100 (Routine)
Holland Wtp	United States	Record daily precipitation	33.3 mm (1.3 in)	28 of 100 (Routine)
Cleveland 2717 Euclid	United States	Record high maximum temperature	33.9 C (93.0 F)	28 of 100 (Routine)
Marlow 1 WSW	United States	Record daily precipitation	38.4 mm (1.5 in)	28 of 100 (Routine)
Beloit	United States	Record daily precipitation	56.4 mm (2.2 in)	28 of 100 (Routine)
Forbesganj	India	Record daily precipitation	110.7 mm (4.4 in)	27 of 100 (Routine)
Lake Arthur 7 SW	United States	Record daily precipitation	65.5 mm (2.6 in)	27 of 100 (Routine)
Brockton	United States	Record high maximum temperature	37.2 C (99.0 F)	27 of 100 (Routine)
Ada	United States	Record daily precipitation	47.2 mm (1.9 in)	27 of 100 (Routine)
Ekaterinburg	Russia	Record daily precipitation	30.1 mm (1.2 in)	26 of 100 (Routine)
Stockholm	Sweden	Record high minimum temperature	17.5 C (63.5 F)	26 of 100 (Routine)
Topeka	United States	Record daily precipitation	57.7 mm (2.3 in)	26 of 100 (Routine)
Keedysville	United States	Record daily precipitation	40.6 mm (1.6 in)	26 of 100 (Routine)
Concord	United States	Record high maximum temperature	35.6 C (96.1 F)	26 of 100 (Routine)
Lawrence	United States	Record high maximum temperature	36.1 C (97.0 F)	26 of 100 (Routine)
Grand Rapids Wb City	United States	Record daily precipitation	31.0 mm (1.2 in)	26 of 100 (Routine)
Bedford Hills	United States	Record high maximum temperature	36.1 C (97.0 F)	26 of 100 (Routine)
Watrap	India	Record daily precipitation	37.3 mm (1.5 in)	25 of 100 (Routine)
Amity	United States	Record high minimum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
Calivil	Australia	Record daily precipitation	29.5 mm (1.2 in)	24 of 100 (Routine)
Pitea	Sweden	Record high minimum temperature	16.0 C (60.8 F)	24 of 100 (Routine)
Osage City	United States	Record daily precipitation	80.0 mm (3.1 in)	24 of 100 (Routine)
Orillia	Canada	Record daily precipitation	34.5 mm (1.4 in)	23 of 100 (Routine)
Kirensk	Russia	Record low minimum temperature	-0.5 C (31.1 F)	23 of 100 (Routine)
Cream Hill	United States	Record high maximum temperature	33.9 C (93.0 F)	23 of 100 (Routine)
Mt Carroll	United States	Record daily precipitation	56.6 mm (2.2 in)	23 of 100 (Routine)
Blue Hill Coop	United States	Record high minimum temperature	22.2 C (72.0 F)	23 of 100 (Routine)
Framingham	United States	Record high maximum temperature	36.1 C (97.0 F)	23 of 100 (Routine)
Teriberka	Russia	Record high minimum temperature	17.9 C (64.2 F)	22 of 100 (Routine)
Vasteras-Hasslo	Sweden	Record high minimum temperature	17.3 C (63.1 F)	22 of 100 (Routine)
Storrs	United States	Record high maximum temperature	34.4 C (93.9 F)	22 of 100 (Routine)
Waterbury	United States	Record high maximum temperature	35.6 C (96.1 F)	22 of 100 (Routine)
World Trade Ctr	United States	Record high maximum temperature	33.9 C (93.0 F)	22 of 100 (Routine)
Raywood	Australia	Record daily precipitation	33.5 mm (1.3 in)	21 of 100 (Routine)
Jennings	United States	Record low maximum temperature	26.1 C (79.0 F)	21 of 100 (Routine)
Blue Hill Coop	United States	Record high maximum temperature	33.9 C (93.0 F)	21 of 100 (Routine)
Worcester	United States	Record high maximum temperature	34.4 C (93.9 F)	21 of 100 (Routine)
Carmel	United States	Record high maximum temperature	36.1 C (97.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

537 records

Records set or tied on 20 August 1937 by type: Highest daily maximum 147, Lowest daily maximum 9, Highest daily minimum 197, Lowest daily minimum 18, Heaviest daily rainfall 166.

Records on 20 August 1937 by type
Record type	Records
Highest daily maximum	147
Lowest daily maximum	9
Highest daily minimum	197
Lowest daily minimum	18
Heaviest daily rainfall	166
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 1937 by timescale: all-time 2, monthly 11, daily 524.

How Much Records Were Beaten By

402 broken records

Margins by which the 402 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 59.9. Ties are not counted.

Top 20 by Significance

20 August 1937

Top 20 records on 20 August 1937 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 1937	Ashland, US	daily rain	67.6 mm (2.7 in)	47.0 mm (1.9 in)	30 years	44 of 100 (Notable)
20 August 1937	Sitka Magnetic Obsy, US	daily rain	70.1 mm (2.8 in)	42.9 mm (1.7 in)	19 years	44 of 100 (Notable)
20 August 1937	Kalamazoo State Hospital, US	daily rain	84.8 mm (3.3 in)	49.2 mm (1.9 in)	12 years	43 of 100 (Notable)
20 August 1937	Passau-Maierhof, DE	daily rain	28.2 mm (1.1 in)	14.5 mm (0.6 in)	52 years	39 of 100 (Notable)
20 August 1937	Mettupalayam, IN	daily rain	47.5 mm (1.9 in)	39.1 mm (1.5 in)	28 years	39 of 100 (Notable)
20 August 1937	Coldwater, US	monthly rain	94.5 mm (3.7 in)	23.6 mm (0.9 in)	25 years	38 of 100 (Notable)
20 August 1937	Hoofddorp, NL	daily rain	30.5 mm (1.2 in)	10.5 mm (0.4 in)	47 years	36 of 100 (Notable)
20 August 1937	Wandoo Wandong, AU	daily rain	31.5 mm (1.2 in)	19.8 mm (0.8 in)	36 years	35 of 100 (Notable)
20 August 1937	Trenton 2, US	daily high max	35.6 C (96.1 F)	2.8 C (5.0 F)	67 years	35 of 100 (Notable)
20 August 1937	Lila Lower, AU	daily rain	31.2 mm (1.2 in)	13.9 mm (0.5 in)	43 years	34 of 100 (Routine)
20 August 1937	Lapeer 2 SE, US	all-time rain	92.2 mm (3.6 in)	3.3 mm (0.13 in)	27 years	34 of 100 (Routine)
20 August 1937	Appleton City, US	daily rain	77.2 mm (3.0 in)	36.1 mm (1.4 in)	30 years	34 of 100 (Routine)
20 August 1937	Collector (Brookdale), AU	daily rain	27.4 mm (1.1 in)	16.0 mm (0.6 in)	36 years	33 of 100 (Routine)
20 August 1937	Olathe 3E, US	daily rain	90.7 mm (3.6 in)	52.9 mm (2.1 in)	4 years	33 of 100 (Routine)
20 August 1937	Brockville, CA	daily high min	21.1 C (70.0 F)	3.3 C (5.9 F)	62 years	32 of 100 (Routine)
20 August 1937	Concord, US	daily high max	33.9 C (93.0 F)	2.2 C (4.0 F)	67 years	32 of 100 (Routine)
20 August 1937	Newark Liberty Intl AP, US	daily high max	35.6 C (96.1 F)	2.8 C (5.0 F)	52 years	32 of 100 (Routine)
20 August 1937	Lawrence, US	daily rain	55.9 mm (2.2 in)	18.3 mm (0.7 in)	41 years	31 of 100 (Routine)
20 August 1937	Burlington, US	daily rain	85.3 mm (3.4 in)	31.2 mm (1.2 in)	24 years	29 of 100 (Routine)
20 August 1937	Ny City Cntrl Park, US	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	67 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

1797 to 1937

Records set or tied on this calendar date in each year from 1797 to 1937. 1937 had 537 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 1937-08-20: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	350
10 to 20	31
20 to 30	10
30 to 40	5
40 to 50	4
50 to 60	2