Weather Records on 9 May 1940

237 weather records were set or tied worldwide on 9 May 1940. Highest significance: Seattle Urban Site, US.

Key Facts for 9 May 1940

On 9 May 1940, 237 weather records were set or tied at long-record stations worldwide.
144 were record highs and 17 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 236 daily.
Seattle Urban Site set a monthly record high minimum temperature of 18.3 C (64.9 F) on 9 May 1940.
Across 166 earlier years (1793 to 2026) the same calendar date averaged 433 records.

Record Map

237 stations

237 station records on 9 May 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 9 May 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Seattle Urban Site	United States	Record high minimum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Ketty	India	Record daily precipitation	52.3 mm (2.1 in)	30 of 100 (Routine)
Karikode	India	Record daily precipitation	96.5 mm (3.8 in)	29 of 100 (Routine)
Eagle Pass 3N	United States	Record daily precipitation	25.4 mm (1.0 in)	28 of 100 (Routine)
Quilandi	India	Record daily precipitation	114.3 mm (4.5 in)	27 of 100 (Routine)
Sivagiri	India	Record daily precipitation	37.3 mm (1.5 in)	27 of 100 (Routine)
Portland Rfc City	United States	Record high maximum temperature	31.7 C (89.1 F)	27 of 100 (Routine)
Stave Falls	Canada	Record high minimum temperature	15.6 C (60.1 F)	26 of 100 (Routine)
Sulur	India	Record daily precipitation	50.8 mm (2.0 in)	26 of 100 (Routine)
Tiruppur	India	Record daily precipitation	32.8 mm (1.3 in)	25 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	27.8 C (82.0 F)	25 of 100 (Routine)
Koloa 936	United States	Record high maximum temperature	30.0 C (86.0 F)	25 of 100 (Routine)
Agassiz Cda	Canada	Record high minimum temperature	11.1 C (52.0 F)	24 of 100 (Routine)
Bellingham	United States	Record high maximum temperature	26.1 C (79.0 F)	24 of 100 (Routine)
Kailua 446	United States	Record high minimum temperature	20.6 C (69.1 F)	24 of 100 (Routine)
Port Blair	India	Record daily precipitation	84.1 mm (3.3 in)	23 of 100 (Routine)
Bryson City 2	United States	Record daily precipitation	29.7 mm (1.2 in)	23 of 100 (Routine)
Headworks Portland Wtr B	United States	Record high maximum temperature	34.4 C (93.9 F)	23 of 100 (Routine)
Brackettville	United States	Record daily precipitation	34.5 mm (1.4 in)	23 of 100 (Routine)
Hondo	United States	Record daily precipitation	69.9 mm (2.8 in)	23 of 100 (Routine)
Ewa Plantation 741	United States	Record high maximum temperature	31.1 C (88.0 F)	23 of 100 (Routine)
Niulii 179	United States	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Sadiya India	India	Record daily precipitation	71.9 mm (2.8 in)	22 of 100 (Routine)
Glenmorgan	India	Record daily precipitation	26.7 mm (1.1 in)	22 of 100 (Routine)
Timovskoe	Russia	Record daily precipitation	15.8 mm (0.6 in)	20 of 100 (Routine)
Bayrick	Australia	Record daily precipitation	17.8 mm (0.7 in)	20 of 100 (Routine)
Manfred Downs Station	Australia	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Alexandria	Australia	Record daily precipitation	2.5 mm (0.10 in)	20 of 100 (Routine)
Aleksandrovsk-Sahalinskij	Russia	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Burketown Post Office	Australia	Record daily precipitation	0.5 mm (0.02 in)	20 of 100 (Routine)
Nicosia	Cyprus	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Avanashi	India	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Kundha (Kailkund)	India	Record daily precipitation	14.0 mm (0.6 in)	20 of 100 (Routine)
Waimanalo 794	United States	Record high minimum temperature	23.3 C (73.9 F)	20 of 100 (Routine)
Cut Bank AP	United States	Record high maximum temperature	30.6 C (87.1 F)	20 of 100 (Routine)
Brunette Downs	Australia	Record daily precipitation	0.5 mm (0.02 in)	19 of 100 (Routine)
Victoria Gonzales Hts	Canada	Record high minimum temperature	10.6 C (51.1 F)	19 of 100 (Routine)
New Westminster	Canada	Record high minimum temperature	14.4 C (57.9 F)	19 of 100 (Routine)
Ramachandrapuram	India	Record daily precipitation	50.8 mm (2.0 in)	19 of 100 (Routine)
Pollachi	India	Record daily precipitation	46.2 mm (1.8 in)	19 of 100 (Routine)
Melur	India	Record daily precipitation	39.4 mm (1.6 in)	19 of 100 (Routine)
Prineville	United States	Record high maximum temperature	31.7 C (89.1 F)	19 of 100 (Routine)
Coorabulka	Australia	Record daily precipitation	2.5 mm (0.10 in)	18 of 100 (Routine)
Bhavani	India	Record daily precipitation	31.8 mm (1.3 in)	18 of 100 (Routine)
Merced	United States	Record high maximum temperature	35.0 C (95.0 F)	18 of 100 (Routine)
Sierra Madre Henszey	United States	Record high minimum temperature	20.0 C (68.0 F)	18 of 100 (Routine)
Salisbury	United States	Record high maximum temperature	32.8 C (91.0 F)	18 of 100 (Routine)
Colfax	United States	Record high maximum temperature	31.7 C (89.1 F)	18 of 100 (Routine)
Evanston 1 E	United States	Record high maximum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Agassiz Cda	Canada	Record high maximum temperature	27.2 C (81.0 F)	17 of 100 (Routine)
Morokweng (Pol)	South Africa	Record daily precipitation	6.1 mm (0.24 in)	17 of 100 (Routine)
Priest Rvr Exp STN	United States	Record high maximum temperature	27.8 C (82.0 F)	17 of 100 (Routine)
Agricultural College	United States	Record low maximum temperature	21.7 C (71.1 F)	17 of 100 (Routine)
Lowville	United States	Record low minimum temperature	-2.8 C (27.0 F)	17 of 100 (Routine)
Weston 2 SE	United States	Record high maximum temperature	31.7 C (89.1 F)	17 of 100 (Routine)
Henrietta	United States	Record daily precipitation	23.9 mm (0.9 in)	17 of 100 (Routine)
Honomanu 450	United States	Record high minimum temperature	18.3 C (64.9 F)	17 of 100 (Routine)
Olaa 92	United States	Record high minimum temperature	20.6 C (69.1 F)	17 of 100 (Routine)
Stave Falls	Canada	Record high maximum temperature	31.1 C (88.0 F)	16 of 100 (Routine)
Clontarf	Canada	Record low minimum temperature	-4.4 C (24.1 F)	16 of 100 (Routine)

Counts by Type and Timescale

237 records

Records set or tied on 9 May 1940 by type: Highest daily maximum 97, Lowest daily maximum 5, Highest daily minimum 47, Lowest daily minimum 12, Heaviest daily rainfall 76.

Records on 9 May 1940 by type
Record type	Records
Highest daily maximum	97
Lowest daily maximum	5
Highest daily minimum	47
Lowest daily minimum	12
Heaviest daily rainfall	76
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 9 May 1940 by timescale: all-time 0, monthly 1, daily 236.

How Much Records Were Beaten By

173 broken records

Margins by which the 173 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 70.6. Ties are not counted.

Top 20 by Significance

9 May 1940

Top 20 records on 9 May 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 May 1940	Seattle Urban Site, US	monthly high min	18.3 C (64.9 F)	2.7 C (4.9 F)	42 years	38 of 100 (Notable)
9 May 1940	Ketty, IN	daily rain	52.3 mm (2.1 in)	20.0 mm (0.8 in)	30 years	30 of 100 (Routine)
9 May 1940	Karikode, IN	daily rain	96.5 mm (3.8 in)	39.6 mm (1.6 in)	24 years	29 of 100 (Routine)
9 May 1940	Eagle Pass 3N, US	daily rain	25.4 mm (1.0 in)	21.8 mm (0.9 in)	48 years	28 of 100 (Routine)
9 May 1940	Quilandi, IN	daily rain	114.3 mm (4.5 in)	70.6 mm (2.8 in)	10 years	27 of 100 (Routine)
9 May 1940	Sivagiri, IN	daily rain	37.3 mm (1.5 in)	19.3 mm (0.8 in)	22 years	27 of 100 (Routine)
9 May 1940	Portland Rfc City, US	daily high max	31.7 C (89.1 F)	2.8 C (5.0 F)	55 years	27 of 100 (Routine)
9 May 1940	Stave Falls, CA	daily high min	15.6 C (60.1 F)	5.0 C (9.0 F)	17 years	26 of 100 (Routine)
9 May 1940	Sulur, IN	daily rain	50.8 mm (2.0 in)	15.7 mm (0.6 in)	37 years	26 of 100 (Routine)
9 May 1940	Tiruppur, IN	daily rain	32.8 mm (1.3 in)	25.7 mm (1.0 in)	24 years	25 of 100 (Routine)
9 May 1940	Aberdeen, US	daily high max	27.8 C (82.0 F)	3.9 C (7.0 F)	38 years	25 of 100 (Routine)
9 May 1940	Koloa 936, US	daily high max	30.0 C (86.0 F)	1.7 C (3.1 F)	33 years	25 of 100 (Routine)
9 May 1940	Agassiz Cda, CA	daily high min	11.1 C (52.0 F)	1.7 C (3.1 F)	47 years	24 of 100 (Routine)
9 May 1940	Bellingham, US	daily high max	26.1 C (79.0 F)	5.0 C (9.0 F)	17 years	24 of 100 (Routine)
9 May 1940	Kailua 446, US	daily high min	20.6 C (69.1 F)	1.7 C (3.1 F)	22 years	24 of 100 (Routine)
9 May 1940	Port Blair, IN	daily rain	84.1 mm (3.3 in)	26.9 mm (1.1 in)	32 years	23 of 100 (Routine)
9 May 1940	Bryson City 2, US	daily rain	29.7 mm (1.2 in)	4.3 mm (0.17 in)	46 years	23 of 100 (Routine)
9 May 1940	Headworks Portland Wtr B, US	daily high max	34.4 C (93.9 F)	5.0 C (9.0 F)	34 years	23 of 100 (Routine)
9 May 1940	Brackettville, US	daily rain	34.5 mm (1.4 in)	32.0 mm (1.3 in)	21 years	23 of 100 (Routine)
9 May 1940	Hondo, US	daily rain	69.9 mm (2.8 in)	36.9 mm (1.5 in)	15 years	23 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 1940

Records set or tied on this calendar date in each year from 1793 to 1940. 1940 had 237 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 1940-05-09: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Margin	Records
0 to 10	148
10 to 20	13
20 to 30	6
30 to 40	5
40 to 50	0
50 to 60	0
60 to 70	0
70 to 80	1