Weather Records on 11 May 1940

340 weather records were set or tied worldwide on 11 May 1940. Highest significance: Tbilisi, GE.

Key Facts for 11 May 1940

On 11 May 1940, 340 weather records were set or tied at long-record stations worldwide.
201 were record highs and 34 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 2 monthly and 337 daily.
Tbilisi set an all-time record daily precipitation of 109.2 mm (4.3 in) on 11 May 1940.
Across 156 earlier years (1814 to 2026) the same calendar date averaged 464 records.

Record Map

340 stations

340 station records on 11 May 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 11 May 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tbilisi	Georgia	Record daily precipitation	109.2 mm (4.3 in)	60 of 100 (Major)
Port Lincoln (White Flat)	Australia	Record daily precipitation	65.0 mm (2.6 in)	55 of 100 (Notable)
Kualapuu 534	United States	Record daily precipitation	76.7 mm (3.0 in)	48 of 100 (Notable)
Penong	Australia	Record daily precipitation	31.5 mm (1.2 in)	47 of 100 (Notable)
Jimbour State School	Australia	Record daily precipitation	37.3 mm (1.5 in)	44 of 100 (Notable)
White Cliffs (Yancannia)	Australia	Record daily precipitation	25.4 mm (1.0 in)	39 of 100 (Notable)
Billings Wtp	United States	Record daily precipitation	64.8 mm (2.6 in)	36 of 100 (Notable)
Huehue 92.1	United States	Record daily precipitation	33.0 mm (1.3 in)	36 of 100 (Notable)
Nanjangud	India	Record daily precipitation	62.2 mm (2.4 in)	34 of 100 (Routine)
Pittsworth	Australia	Record daily precipitation	37.6 mm (1.5 in)	33 of 100 (Routine)
Molakmura	India	Record daily precipitation	52.8 mm (2.1 in)	31 of 100 (Routine)
Kingaroy Prince Street	Australia	Record daily precipitation	35.6 mm (1.4 in)	30 of 100 (Routine)
Hoaeae Upper	United States	Record daily precipitation	31.5 mm (1.2 in)	28 of 100 (Routine)
Kilauea 1134	United States	Record daily precipitation	59.7 mm (2.4 in)	27 of 100 (Routine)
Lock (Terre)	Australia	Record daily precipitation	25.1 mm (1.0 in)	26 of 100 (Routine)
Grenfell	Canada	Record high maximum temperature	33.3 C (91.9 F)	26 of 100 (Routine)
American Falls 6 NE	United States	Record high minimum temperature	13.9 C (57.0 F)	26 of 100 (Routine)
Saskatoon Diefenbaker Int'l A	Canada	Record high minimum temperature	14.4 C (57.9 F)	25 of 100 (Routine)
Dalby Post Office	Australia	Record daily precipitation	27.9 mm (1.1 in)	24 of 100 (Routine)
Fort Macleod	Canada	Record high maximum temperature	30.0 C (86.0 F)	24 of 100 (Routine)
Russell	Canada	Record high maximum temperature	34.4 C (93.9 F)	24 of 100 (Routine)
Oakley	United States	Record high minimum temperature	13.3 C (55.9 F)	24 of 100 (Routine)
Twin Falls 2 NNE	United States	Record high minimum temperature	15.0 C (59.0 F)	24 of 100 (Routine)
Makaweli 965	United States	Record daily precipitation	27.9 mm (1.1 in)	24 of 100 (Routine)
Niulii 179	United States	Record high minimum temperature	22.8 C (73.0 F)	24 of 100 (Routine)
Revelstoke	Canada	Record high minimum temperature	11.1 C (52.0 F)	23 of 100 (Routine)
Banff	Canada	Record high minimum temperature	6.7 C (44.1 F)	23 of 100 (Routine)
Minnedosa	Canada	Record high maximum temperature	32.2 C (90.0 F)	23 of 100 (Routine)
Norway House	Canada	Record high maximum temperature	25.0 C (77.0 F)	23 of 100 (Routine)
Cut Bank AP	United States	Record high minimum temperature	11.1 C (52.0 F)	23 of 100 (Routine)
Fort Simpson	Canada	Record low maximum temperature	-0.6 C (30.9 F)	22 of 100 (Routine)
Yorkton	Canada	Record high maximum temperature	35.0 C (95.0 F)	22 of 100 (Routine)
Ft Collins	United States	Record high maximum temperature	31.1 C (88.0 F)	21 of 100 (Routine)
Porthill	United States	Record high minimum temperature	12.8 C (55.0 F)	21 of 100 (Routine)
Vale	United States	Record high minimum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Clark 4 SW	United States	Record high minimum temperature	15.6 C (60.1 F)	21 of 100 (Routine)
White Well	Australia	Record daily precipitation	21.8 mm (0.9 in)	20 of 100 (Routine)
Glen Boree	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Penong (Penalumba)	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Tibooburra (Onepah)	Australia	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Beltana	Australia	Record daily precipitation	11.4 mm (0.4 in)	20 of 100 (Routine)
Quinyambie	Australia	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Penneshaw 2	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Mount Irving	Australia	Record daily precipitation	16.3 mm (0.6 in)	20 of 100 (Routine)
White Cliffs (Purnanga)	Australia	Record daily precipitation	14.2 mm (0.6 in)	20 of 100 (Routine)
Charlotte Plains	Australia	Record daily precipitation	10.2 mm (0.4 in)	20 of 100 (Routine)
Ceduna Post Office	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Ceduna (Goode)	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Siruguppa	India	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Nonning	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Tilcha	Australia	Record daily precipitation	11.7 mm (0.5 in)	20 of 100 (Routine)
Kappawanta	Australia	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Kynnersley	Australia	Record daily precipitation	8.9 mm (0.35 in)	20 of 100 (Routine)
Wyandra Railway St	Australia	Record daily precipitation	5.6 mm (0.22 in)	20 of 100 (Routine)
Franklyn Vale	Australia	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Moose Jaw Chab	Canada	Record high minimum temperature	15.0 C (59.0 F)	20 of 100 (Routine)
Prince Albert	Canada	Record high maximum temperature	27.8 C (82.0 F)	20 of 100 (Routine)
Geraldine 6 SE	United States	Record high minimum temperature	11.7 C (53.1 F)	20 of 100 (Routine)
Thermopolis	United States	Record high maximum temperature	31.7 C (89.1 F)	20 of 100 (Routine)
Haina 214	United States	Record high minimum temperature	21.1 C (70.0 F)	20 of 100 (Routine)

Counts by Type and Timescale

340 records

Records set or tied on 11 May 1940 by type: Highest daily maximum 113, Lowest daily maximum 10, Highest daily minimum 88, Lowest daily minimum 24, Heaviest daily rainfall 104, Heaviest daily snowfall 1.

Records on 11 May 1940 by type
Record type	Records
Highest daily maximum	113
Lowest daily maximum	10
Highest daily minimum	88
Lowest daily minimum	24
Heaviest daily rainfall	104
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 11 May 1940 by timescale: all-time 1, monthly 2, daily 337.

How Much Records Were Beaten By

283 broken records

Margins by which the 283 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 38.0. Ties are not counted.

Top 20 by Significance

11 May 1940

Top 20 records on 11 May 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 May 1940	Tbilisi, GE	all-time rain	109.2 mm (4.3 in)	29.1 mm (1.1 in)	8 years	60 of 100 (Major)
11 May 1940	Port Lincoln (White Flat), AU	monthly rain	65.0 mm (2.6 in)	25.4 mm (1.0 in)	6 years	55 of 100 (Notable)
11 May 1940	Kualapuu 534, US	monthly rain	76.7 mm (3.0 in)	25.4 mm (1.0 in)	2 years	48 of 100 (Notable)
11 May 1940	Penong, AU	daily rain	31.5 mm (1.2 in)	24.9 mm (1.0 in)	13 years	47 of 100 (Notable)
11 May 1940	Jimbour State School, AU	daily rain	37.3 mm (1.5 in)	24.1 mm (0.9 in)	42 years	44 of 100 (Notable)
11 May 1940	White Cliffs (Yancannia), AU	daily rain	25.4 mm (1.0 in)	20.1 mm (0.8 in)	29 years	39 of 100 (Notable)
11 May 1940	Billings Wtp, US	daily rain	64.8 mm (2.6 in)	23.9 mm (0.9 in)	17 years	36 of 100 (Notable)
11 May 1940	Huehue 92.1, US	daily rain	33.0 mm (1.3 in)	27.4 mm (1.1 in)	32 years	36 of 100 (Notable)
11 May 1940	Nanjangud, IN	daily rain	62.2 mm (2.4 in)	31.7 mm (1.2 in)	33 years	34 of 100 (Routine)
11 May 1940	Pittsworth, AU	daily rain	37.6 mm (1.5 in)	18.0 mm (0.7 in)	29 years	33 of 100 (Routine)
11 May 1940	Molakmura, IN	daily rain	52.8 mm (2.1 in)	31.7 mm (1.2 in)	8 years	31 of 100 (Routine)
11 May 1940	Kingaroy Prince Street, AU	daily rain	35.6 mm (1.4 in)	23.9 mm (0.9 in)	3 years	30 of 100 (Routine)
11 May 1940	Hoaeae Upper, US	daily rain	31.5 mm (1.2 in)	13.0 mm (0.5 in)	24 years	28 of 100 (Routine)
11 May 1940	Kilauea 1134, US	daily rain	59.7 mm (2.4 in)	24.9 mm (1.0 in)	12 years	27 of 100 (Routine)
11 May 1940	Lock (Terre), AU	daily rain	25.1 mm (1.0 in)	10.4 mm (0.4 in)	20 years	26 of 100 (Routine)
11 May 1940	Grenfell, CA	daily high max	33.3 C (91.9 F)	7.2 C (13.0 F)	34 years	26 of 100 (Routine)
11 May 1940	American Falls 6 NE, US	daily high min	13.9 C (57.0 F)	3.9 C (7.0 F)	45 years	26 of 100 (Routine)
11 May 1940	Saskatoon Diefenbaker Int'l A, CA	daily high min	14.4 C (57.9 F)	4.4 C (7.9 F)	40 years	25 of 100 (Routine)
11 May 1940	Dalby Post Office, AU	daily rain	27.9 mm (1.1 in)	9.9 mm (0.39 in)	29 years	24 of 100 (Routine)
11 May 1940	Fort Macleod, CA	daily high max	30.0 C (86.0 F)	3.9 C (7.0 F)	40 years	24 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

1814 to 1940

Records set or tied on this calendar date in each year from 1814 to 1940. 1940 had 340 records.

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

Records on 05-11 in each year
Year	Records
1814	3
1832	1
1836	3
1837	1
1838	1
1848	2
1856	1
1860	2
1865	1
1867	1
1869	1
1872	1
1874	2
1879	2
1880	1
1881	5
1883	3
1884	2
1885	1
1886	2
1887	1
1888	1
1889	2
1892	1
1893	3
1894	2
1895	4
1896	3
1897	6
1898	5
1900	7
1901	9
1902	6
1903	7
1904	6
1905	12
1906	21
1907	44
1908	9
1909	12
1910	16
1911	99
1912	21
1913	20
1914	20
1915	16
1916	22
1917	40
1918	54
1919	56
1920	181
1921	58
1922	61
1923	111
1924	239
1925	410
1926	472
1927	318
1928	252
1929	126
1930	380
1931	254
1932	170
1933	429
1934	332
1935	276
1936	363
1937	170
1938	141
1939	213
1940	340
1941	411
1942	389
1943	646
1944	408
1945	483
1946	747
1947	480
1948	407
1949	451
1950	285
1951	395
1952	629
1953	686
1954	492
1955	235
1956	942
1957	439
1958	499
1959	575
1960	809
1961	663
1962	670
1963	984
1964	299
1965	356
1966	992
1967	974
1968	909
1969	349
1970	764
1971	565
1972	673
1973	429
1974	795
1975	383
1976	509
1977	836
1978	1,070
1979	1,239
1980	693
1981	1,298
1982	624
1983	930
1984	666
1985	835
1986	684
1987	1,247
1988	485
1989	952
1990	935
1991	990
1992	728
1993	1,088
1994	633
1995	1,244
1996	1,088
1997	1,033
1998	1,315
1999	1,052
2000	1,286
2001	848
2002	845
2003	1,321
2004	834
2005	944
2006	822
2007	833
2008	1,015
2009	605
2010	1,292
2011	1,414
2012	1,181
2013	615
2014	662
2015	1,038
2016	497
2017	546
2018	988
2019	915
2020	1,068
2021	590
2022	1,470
2023	390
2024	579
2025	1,104
2026	797

Download the Data

Data for records on 1940-05-11: 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 5	220
5 to 10	32
10 to 15	13
15 to 20	5
20 to 25	6
25 to 30	4
30 to 35	2
35 to 40	1