Weather Records on 18 June 1940

620 weather records were set or tied worldwide on 18 June 1940. Highest significance: Tshakhuma, ZA.

Key Facts for 18 June 1940

On 18 June 1940, 620 weather records were set or tied at long-record stations worldwide.
404 were record highs and 20 were record lows, counting maximum and minimum temperature.
By timescale, 2 were all-time records, 46 monthly and 572 daily.
Tshakhuma set a monthly record daily precipitation of 58.2 mm (2.3 in) on 18 June 1940.
Across 162 earlier years (1800 to 2026) the same calendar date averaged 435 records.

Record Map

620 stations

620 station records on 18 June 1940 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 June 1940: highest significance records shown on the map
Station	Country	Type	Value	Significance
Tshakhuma	South Africa	Record daily precipitation	58.2 mm (2.3 in)	61 of 100 (Major)
De Wagendrift	South Africa	Record daily precipitation	63.5 mm (2.5 in)	59 of 100 (Notable)
Elandsfontein	South Africa	Record daily precipitation	63.5 mm (2.5 in)	58 of 100 (Notable)
Palmaryville	South Africa	Record daily precipitation	73.4 mm (2.9 in)	56 of 100 (Notable)
Hubli	India	Record daily precipitation	47.2 mm (1.9 in)	50 of 100 (Notable)
Pilanesberg-Pol	South Africa	Record daily precipitation	46.2 mm (1.8 in)	50 of 100 (Notable)
Villa Nora (Pol)	South Africa	Record daily precipitation	38.1 mm (1.5 in)	50 of 100 (Notable)
Brockville	Canada	Record daily precipitation	57.2 mm (2.3 in)	48 of 100 (Notable)
Shiggaon	India	Record daily precipitation	51.8 mm (2.0 in)	47 of 100 (Notable)
Roodekuil	South Africa	Record daily precipitation	49.0 mm (1.9 in)	47 of 100 (Notable)
Pilgrims Rest (Pol)	South Africa	Record daily precipitation	25.7 mm (1.0 in)	43 of 100 (Notable)
Rockford	United States	Record daily precipitation	85.1 mm (3.4 in)	43 of 100 (Notable)
Mankayane	Swaziland	Record daily precipitation	36.8 mm (1.4 in)	41 of 100 (Notable)
Machadodorp	South Africa	Record daily precipitation	35.1 mm (1.4 in)	40 of 100 (Notable)
Nebo	South Africa	Record daily precipitation	40.1 mm (1.6 in)	40 of 100 (Notable)
Quebec	Canada	Record daily precipitation	61.7 mm (2.4 in)	39 of 100 (Notable)
Dullstroom (Sar)	South Africa	Record daily precipitation	53.3 mm (2.1 in)	36 of 100 (Notable)
Haenertsburg (Pol)	South Africa	Record daily precipitation	35.6 mm (1.4 in)	36 of 100 (Notable)
Wai	India	Record daily precipitation	71.1 mm (2.8 in)	35 of 100 (Notable)
Derby	South Africa	Record daily precipitation	41.9 mm (1.6 in)	35 of 100 (Notable)
Mbabane	Swaziland	Record daily precipitation	50.8 mm (2.0 in)	35 of 100 (Notable)
Balurghat	India	Record daily precipitation	100.6 mm (4.0 in)	34 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record daily precipitation	27.6 mm (1.1 in)	34 of 100 (Routine)
Waupaca	United States	Record daily precipitation	57.7 mm (2.3 in)	34 of 100 (Routine)
Budapest	Hungary	Record daily precipitation	30.4 mm (1.2 in)	33 of 100 (Routine)
Contai	India	Record daily precipitation	113.0 mm (4.4 in)	33 of 100 (Routine)
Sibasa	South Africa	Record daily precipitation	50.8 mm (2.0 in)	33 of 100 (Routine)
Maquoketa	United States	Record daily precipitation	62.5 mm (2.5 in)	33 of 100 (Routine)
Centennial Park	Australia	Record daily precipitation	58.7 mm (2.3 in)	32 of 100 (Routine)
Dapto West (Stane Dykes)	Australia	Record daily precipitation	55.9 mm (2.2 in)	31 of 100 (Routine)
Hukeri	India	Record daily precipitation	43.7 mm (1.7 in)	30 of 100 (Routine)
Milan	Italy	Record daily precipitation	51.9 mm (2.0 in)	30 of 100 (Routine)
Bronkhorstspruit (Mun)	South Africa	Record daily precipitation	31.8 mm (1.3 in)	30 of 100 (Routine)
Naboomspruit (Pol)	South Africa	Record daily precipitation	53.6 mm (2.1 in)	30 of 100 (Routine)
Nogales	United States	Record high maximum temperature	43.3 C (109.9 F)	30 of 100 (Routine)
Burnet	United States	Record low maximum temperature	25.6 C (78.1 F)	30 of 100 (Routine)
Bedford 2 SE	United States	Record daily snowfall	11.4 cm (4.5 in)	30 of 100 (Routine)
Kendrapara	India	Record daily precipitation	104.4 mm (4.1 in)	27 of 100 (Routine)
Lawrenceville 2 S	United States	Record high minimum temperature	23.3 C (73.9 F)	27 of 100 (Routine)
Corinne	United States	Record high maximum temperature	42.8 C (109.0 F)	27 of 100 (Routine)
Houston Wb City	United States	Record daily precipitation	76.7 mm (3.0 in)	27 of 100 (Routine)
Heidelberg I	South Africa	Record daily precipitation	27.9 mm (1.1 in)	26 of 100 (Routine)
Ft Bidwell	United States	Record high maximum temperature	34.4 C (93.9 F)	26 of 100 (Routine)
Abbeville	United States	Record daily precipitation	61.0 mm (2.4 in)	26 of 100 (Routine)
Grand Cane Fire Twr	United States	Record low maximum temperature	25.6 C (78.1 F)	26 of 100 (Routine)
Smithfield	United States	Record daily precipitation	38.1 mm (1.5 in)	26 of 100 (Routine)
Klamath Falls 2 SSW	United States	Record high minimum temperature	17.2 C (63.0 F)	26 of 100 (Routine)
Riverside 7 SSW	United States	Record high maximum temperature	41.1 C (106.0 F)	26 of 100 (Routine)
Bedford 2 SE	United States	Record high maximum temperature	33.3 C (91.9 F)	26 of 100 (Routine)
Duiwelskloof (Mun)	South Africa	Record daily precipitation	30.5 mm (1.2 in)	25 of 100 (Routine)
Columbus	United States	Record daily precipitation	42.4 mm (1.7 in)	25 of 100 (Routine)
Eureka	United States	Record high maximum temperature	34.4 C (93.9 F)	24 of 100 (Routine)
Brodhead Wwtp	United States	Record daily precipitation	65.3 mm (2.6 in)	24 of 100 (Routine)
Stevens Pt	United States	Record daily precipitation	49.8 mm (2.0 in)	24 of 100 (Routine)
Hana 354	United States	Record high maximum temperature	30.6 C (87.1 F)	24 of 100 (Routine)
Southport Ridgeway Ave	Australia	Record daily precipitation	35.1 mm (1.4 in)	23 of 100 (Routine)
Bombay (Colaba) Obsy Sr	India	Record daily precipitation	143.3 mm (5.6 in)	23 of 100 (Routine)
Igatpuri	India	Record daily precipitation	116.3 mm (4.6 in)	23 of 100 (Routine)
Irkutsk	Russia	Record high minimum temperature	15.8 C (60.4 F)	23 of 100 (Routine)
Durban-Botanical Gardens	South Africa	Record daily precipitation	30.5 mm (1.2 in)	23 of 100 (Routine)

Counts by Type and Timescale

620 records

Records set or tied on 18 June 1940 by type: Highest daily maximum 223, Lowest daily maximum 14, Highest daily minimum 181, Lowest daily minimum 6, Heaviest daily rainfall 195, Heaviest daily snowfall 1.

Records on 18 June 1940 by type
Record type	Records
Highest daily maximum	223
Lowest daily maximum	14
Highest daily minimum	181
Lowest daily minimum	6
Heaviest daily rainfall	195
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 18 June 1940 by timescale: all-time 2, monthly 46, daily 572.

How Much Records Were Beaten By

481 broken records

Margins by which the 481 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 62.7. Ties are not counted.

Top 20 by Significance

18 June 1940

Top 20 records on 18 June 1940 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 June 1940	Tshakhuma, ZA	monthly rain	58.2 mm (2.3 in)	29.0 mm (1.1 in)	29 years	61 of 100 (Major)
18 June 1940	De Wagendrift, ZA	monthly rain	63.5 mm (2.5 in)	47.5 mm (1.9 in)	23 years	59 of 100 (Notable)
18 June 1940	Elandsfontein, ZA	monthly rain	63.5 mm (2.5 in)	45.7 mm (1.8 in)	18 years	58 of 100 (Notable)
18 June 1940	Palmaryville, ZA	monthly rain	73.4 mm (2.9 in)	52.8 mm (2.1 in)	10 years	56 of 100 (Notable)
18 June 1940	Hubli, IN	daily rain	47.2 mm (1.9 in)	32.5 mm (1.3 in)	33 years	50 of 100 (Notable)
18 June 1940	Pilanesberg-Pol, ZA	monthly rain	46.2 mm (1.8 in)	28.4 mm (1.1 in)	30 years	50 of 100 (Notable)
18 June 1940	Villa Nora (Pol), ZA	daily rain	38.1 mm (1.5 in)	38.1 mm (1.5 in)	31 years	50 of 100 (Notable)
18 June 1940	Brockville, CA	daily rain	57.2 mm (2.3 in)	34.3 mm (1.4 in)	20 years	48 of 100 (Notable)
18 June 1940	Shiggaon, IN	daily rain	51.8 mm (2.0 in)	37.8 mm (1.5 in)	13 years	47 of 100 (Notable)
18 June 1940	Roodekuil, ZA	monthly rain	49.0 mm (1.9 in)	28.2 mm (1.1 in)	23 years	47 of 100 (Notable)
18 June 1940	Pilgrims Rest (Pol), ZA	monthly rain	25.7 mm (1.0 in)	9.7 mm (0.38 in)	3 years	43 of 100 (Notable)
18 June 1940	Rockford, US	daily rain	85.1 mm (3.4 in)	49.5 mm (1.9 in)	8 years	43 of 100 (Notable)
18 June 1940	Mankayane, SZ	monthly rain	36.8 mm (1.4 in)	13.2 mm (0.5 in)	0 years	41 of 100 (Notable)
18 June 1940	Machadodorp, ZA	monthly rain	35.1 mm (1.4 in)	12.7 mm (0.5 in)	14 years	40 of 100 (Notable)
18 June 1940	Nebo, ZA	daily rain	40.1 mm (1.6 in)	36.3 mm (1.4 in)	6 years	40 of 100 (Notable)
18 June 1940	Quebec, CA	daily rain	61.7 mm (2.4 in)	27.7 mm (1.1 in)	18 years	39 of 100 (Notable)
18 June 1940	Dullstroom (Sar), ZA	monthly rain	53.3 mm (2.1 in)	23.1 mm (0.9 in)	2 years	36 of 100 (Notable)
18 June 1940	Haenertsburg (Pol), ZA	monthly rain	35.6 mm (1.4 in)	9.2 mm (0.36 in)	29 years	36 of 100 (Notable)
18 June 1940	Wai, IN	daily rain	71.1 mm (2.8 in)	36.8 mm (1.4 in)	13 years	35 of 100 (Notable)
18 June 1940	Derby, ZA	monthly rain	41.9 mm (1.6 in)	19.0 mm (0.7 in)	11 years	35 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

1800 to 1940

Records set or tied on this calendar date in each year from 1800 to 1940. 1940 had 620 records.

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

Records on 06-18 in each year
Year	Records
1800	1
1801	1
1802	1
1803	1
1816	1
1821	1
1823	1
1839	1
1841	1
1848	1
1855	1
1858	2
1859	1
1862	2
1865	1
1869	1
1870	1
1875	2
1876	1
1879	1
1880	1
1881	2
1882	2
1883	1
1884	1
1886	1
1888	3
1889	1
1890	3
1892	3
1893	1
1894	2
1895	3
1896	4
1897	5
1899	3
1900	4
1901	10
1902	7
1903	13
1904	5
1905	32
1906	16
1907	21
1908	20
1909	39
1910	15
1911	14
1912	25
1913	29
1914	43
1915	62
1916	29
1917	55
1918	118
1919	65
1920	53
1921	44
1922	57
1923	144
1924	108
1925	246
1926	176
1927	287
1928	205
1929	297
1930	379
1931	267
1932	219
1933	499
1934	335
1935	494
1936	549
1937	301
1938	391
1939	674
1940	620
1941	273
1942	201
1943	173
1944	726
1945	784
1946	532
1947	391
1948	421
1949	734
1950	828
1951	237
1952	435
1953	730
1954	460
1955	721
1956	373
1957	672
1958	532
1959	573
1960	394
1961	979
1962	302
1963	305
1964	840
1965	589
1966	431
1967	308
1968	556
1969	598
1970	486
1971	456
1972	334
1973	861
1974	719
1975	821
1976	508
1977	768
1978	516
1979	581
1980	447
1981	895
1982	736
1983	1,080
1984	716
1985	921
1986	862
1987	925
1988	748
1989	697
1990	795
1991	944
1992	579
1993	834
1994	1,156
1995	1,224
1996	1,004
1997	894
1998	1,600
1999	1,258
2000	1,474
2001	589
2002	1,397
2003	853
2004	1,056
2005	1,014
2006	699
2007	898
2008	628
2009	920
2010	928
2011	952
2012	832
2013	847
2014	732
2015	978
2016	787
2017	839
2018	968
2019	425
2020	572
2021	1,874
2022	1,194
2023	574
2024	1,150
2025	583
2026	830

Download the Data

Data for records on 1940-06-18: 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	387
10 to 20	53
20 to 30	20
30 to 40	11
40 to 50	6
50 to 60	3
60 to 70	1