Weather Records on 18 May 1931

191 weather records were set or tied worldwide on 18 May 1931. Highest significance: Norddal, NO.

Key Facts for 18 May 1931

On 18 May 1931, 191 weather records were set or tied at long-record stations worldwide.
55 were record highs and 80 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 3 monthly and 188 daily.
Norddal set a daily record precipitation of 37.0 mm (1.5 in) on 18 May 1931.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 444 records.

Record Map

191 stations

191 station records on 18 May 1931 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1931: highest significance records shown on the map
Station	Country	Type	Value	Significance
Norddal	Norway	Record daily precipitation	37.0 mm (1.5 in)	48 of 100 (Notable)
Hafslo	Norway	Record daily precipitation	43.0 mm (1.7 in)	46 of 100 (Notable)
Lamar 7N	United States	Record daily precipitation	86.4 mm (3.4 in)	37 of 100 (Notable)
Sulitjelma	Norway	Record daily precipitation	26.2 mm (1.0 in)	35 of 100 (Notable)
Kansas City	United States	Record daily precipitation	70.4 mm (2.8 in)	33 of 100 (Routine)
Sogndal - Selseng	Norway	Record daily precipitation	29.6 mm (1.2 in)	27 of 100 (Routine)
Ft Bidwell	United States	Record low minimum temperature	-2.8 C (27.0 F)	26 of 100 (Routine)
Kiruna	Sweden	Record daily precipitation	26.6 mm (1.0 in)	24 of 100 (Routine)
Olathe 3E	United States	Record daily precipitation	58.4 mm (2.3 in)	24 of 100 (Routine)
Canyon Ferry	United States	Record low maximum temperature	4.4 C (39.9 F)	23 of 100 (Routine)
Battleford	Canada	Record low maximum temperature	6.1 C (43.0 F)	22 of 100 (Routine)
Port Dover	Canada	Record low minimum temperature	-3.9 C (25.0 F)	22 of 100 (Routine)
Burlington	United States	Record daily precipitation	46.0 mm (1.8 in)	22 of 100 (Routine)
Nashua 2 NNW	United States	Record low minimum temperature	-1.7 C (28.9 F)	22 of 100 (Routine)
Old Halls Creek	Australia	Record high minimum temperature	21.8 C (71.2 F)	21 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	23.3 mm (0.9 in)	20 of 100 (Routine)
Liepaja	Latvia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Karasjok	Norway	Record daily precipitation	11.0 mm (0.4 in)	20 of 100 (Routine)
Tustervatnet	Norway	Record daily precipitation	18.0 mm (0.7 in)	20 of 100 (Routine)
Gallivare_A	Sweden	Record daily precipitation	24.9 mm (1.0 in)	20 of 100 (Routine)
Atyrau	Kazakhstan	Record daily precipitation	13.6 mm (0.5 in)	20 of 100 (Routine)
Waukesha Wwtp	United States	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Lien I Selbu	Norway	Record daily precipitation	13.4 mm (0.5 in)	20 of 100 (Routine)
Bajramaly	Turkmenistan	Record daily precipitation	8.6 mm (0.34 in)	20 of 100 (Routine)
Collbran	United States	Record low minimum temperature	-3.9 C (25.0 F)	20 of 100 (Routine)
Ft Mc Intosh	United States	Record daily precipitation	64.5 mm (2.5 in)	20 of 100 (Routine)
Broome Post Office	Australia	Record low maximum temperature	22.5 C (72.5 F)	19 of 100 (Routine)
Gorlitz	Germany	Record high minimum temperature	14.5 C (58.1 F)	19 of 100 (Routine)
Trenton	United States	Record daily precipitation	48.5 mm (1.9 in)	19 of 100 (Routine)
Waynesville 1 E	United States	Record daily precipitation	28.2 mm (1.1 in)	19 of 100 (Routine)
Grantsburg	United States	Record daily precipitation	16.5 mm (0.6 in)	19 of 100 (Routine)
Manitowoc	United States	Record daily precipitation	18.3 mm (0.7 in)	19 of 100 (Routine)
Medicine Hat A	Canada	Record daily snowfall	0.3 cm (0.1 in)	18 of 100 (Routine)
Lugansk	Ukraine	Record daily precipitation	15.5 mm (0.6 in)	18 of 100 (Routine)
Plymouth	United States	Record low minimum temperature	-3.3 C (26.1 F)	18 of 100 (Routine)
Aleksandrovsk-Sahalinskij	Russia	Record low minimum temperature	-3.3 C (26.1 F)	17 of 100 (Routine)
Tarnaby	Sweden	Record daily precipitation	11.9 mm (0.5 in)	17 of 100 (Routine)
Santa Maria	United States	Record high maximum temperature	32.8 C (91.0 F)	17 of 100 (Routine)
Seward	United States	Record daily precipitation	27.4 mm (1.1 in)	17 of 100 (Routine)
Durham	United States	Record low minimum temperature	-2.2 C (28.0 F)	17 of 100 (Routine)
Lowville	United States	Record low minimum temperature	-1.1 C (30.0 F)	17 of 100 (Routine)
Laketown	United States	Record low minimum temperature	-4.4 C (24.1 F)	17 of 100 (Routine)
Yerevan	Armenia	Record low minimum temperature	6.3 C (43.3 F)	16 of 100 (Routine)
Pointe Au Pere	Canada	Record high minimum temperature	10.6 C (51.1 F)	16 of 100 (Routine)
Bayana Biana	India	Record daily precipitation	7.1 mm (0.28 in)	16 of 100 (Routine)
Kirov	Russia	Record high minimum temperature	13.0 C (55.4 F)	16 of 100 (Routine)
Atchison	United States	Record daily precipitation	59.9 mm (2.4 in)	16 of 100 (Routine)
Columbus	United States	Record daily precipitation	48.3 mm (1.9 in)	16 of 100 (Routine)
Leitchfield 2 N	United States	Record high minimum temperature	19.4 C (66.9 F)	16 of 100 (Routine)
Deer Park Sf	United States	Record daily precipitation	20.3 mm (0.8 in)	16 of 100 (Routine)
Nebraska City 1 NW	United States	Record daily precipitation	30.5 mm (1.2 in)	16 of 100 (Routine)
Broome Post Office	Australia	Record daily precipitation	3.0 mm (0.12 in)	15 of 100 (Routine)
Syktyvkar	Russia	Record high minimum temperature	13.1 C (55.6 F)	15 of 100 (Routine)
Las Animas	United States	Record high maximum temperature	37.8 C (100.0 F)	15 of 100 (Routine)
Cambridge	United States	Record low minimum temperature	-2.8 C (27.0 F)	15 of 100 (Routine)
St Joseph	United States	Record daily precipitation	43.2 mm (1.7 in)	15 of 100 (Routine)
Franklin	United States	Record low minimum temperature	-3.9 C (25.0 F)	15 of 100 (Routine)
Highlands	United States	Record high maximum temperature	28.3 C (82.9 F)	15 of 100 (Routine)
Cottbus	Germany	Record high minimum temperature	15.1 C (59.2 F)	14 of 100 (Routine)
Krakmo	Norway	Record daily precipitation	18.0 mm (0.7 in)	14 of 100 (Routine)

Counts by Type and Timescale

191 records

Records set or tied on 18 May 1931 by type: Highest daily maximum 17, Lowest daily maximum 12, Highest daily minimum 38, Lowest daily minimum 68, Heaviest daily rainfall 55, Heaviest daily snowfall 1.

Records on 18 May 1931 by type
Record type	Records
Highest daily maximum	17
Lowest daily maximum	12
Highest daily minimum	38
Lowest daily minimum	68
Heaviest daily rainfall	55
Heaviest daily snowfall	1
Deepest snow cover	0

Records on 18 May 1931 by timescale: all-time 0, monthly 3, daily 188.

How Much Records Were Beaten By

153 broken records

Margins by which the 153 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 57.2. Ties are not counted.

Top 20 by Significance

18 May 1931

Top 20 records on 18 May 1931 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1931	Norddal, NO	daily rain	37.0 mm (1.5 in)	22.5 mm (0.9 in)	17 years	48 of 100 (Notable)
18 May 1931	Hafslo, NO	monthly rain	43.0 mm (1.7 in)	13.2 mm (0.5 in)	17 years	46 of 100 (Notable)
18 May 1931	Lamar 7N, US	daily rain	86.4 mm (3.4 in)	57.2 mm (2.3 in)	1 year	37 of 100 (Notable)
18 May 1931	Sulitjelma, NO	daily rain	26.2 mm (1.0 in)	12.1 mm (0.5 in)	26 years	35 of 100 (Notable)
18 May 1931	Kansas City, US	daily rain	70.4 mm (2.8 in)	37.9 mm (1.5 in)	16 years	33 of 100 (Routine)
18 May 1931	Sogndal - Selseng, NO	daily rain	29.6 mm (1.2 in)	11.3 mm (0.4 in)	22 years	27 of 100 (Routine)
18 May 1931	Ft Bidwell, US	daily low min	-2.8 C (27.0 F)	1.7 C (3.1 F)	54 years	26 of 100 (Routine)
18 May 1931	Kiruna, SE	monthly rain	26.6 mm (1.0 in)	4.2 mm (0.17 in)	2 years	24 of 100 (Routine)
18 May 1931	Olathe 3E, US	daily rain	58.4 mm (2.3 in)	23.3 mm (0.9 in)	16 years	24 of 100 (Routine)
18 May 1931	Canyon Ferry, US	monthly low max	4.4 C (39.9 F)	0.6 C (1.1 F)	32 years	23 of 100 (Routine)
18 May 1931	Battleford, CA	daily low max	6.1 C (43.0 F)	2.2 C (4.0 F)	49 years	22 of 100 (Routine)
18 May 1931	Port Dover, CA	daily low min	-3.9 C (25.0 F)	3.9 C (7.0 F)	31 years	22 of 100 (Routine)
18 May 1931	Burlington, US	daily rain	46.0 mm (1.8 in)	25.7 mm (1.0 in)	8 years	22 of 100 (Routine)
18 May 1931	Nashua 2 NNW, US	daily low min	-1.7 C (28.9 F)	2.3 C (4.1 F)	44 years	22 of 100 (Routine)
18 May 1931	Old Halls Creek, AU	daily high min	21.8 C (71.2 F)	4.0 C (7.2 F)	30 years	21 of 100 (Routine)
18 May 1931	Karesuando, SE	daily rain	23.3 mm (0.9 in)	14.3 mm (0.6 in)	26 years	20 of 100 (Routine)
18 May 1931	Liepaja, LV	daily rain	20.3 mm (0.8 in)	11.3 mm (0.4 in)	28 years	20 of 100 (Routine)
18 May 1931	Karasjok, NO	daily rain	11.0 mm (0.4 in)	9.0 mm (0.35 in)	14 years	20 of 100 (Routine)
18 May 1931	Tustervatnet, NO	daily rain	18.0 mm (0.7 in)	5.8 mm (0.23 in)	31 years	20 of 100 (Routine)
18 May 1931	Gallivare_A, SE	daily rain	24.9 mm (1.0 in)	5.4 mm (0.21 in)	26 years	20 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

1796 to 1931

Records set or tied on this calendar date in each year from 1796 to 1931. 1931 had 191 records.

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

Records on 05-18 in each year
Year	Records
1796	1
1798	1
1802	2
1832	1
1833	1
1845	1
1847	1
1848	1
1855	1
1859	1
1861	2
1863	3
1864	1
1866	2
1868	2
1869	1
1870	1
1871	2
1872	1
1874	2
1877	4
1878	1
1879	1
1881	1
1883	2
1884	2
1885	1
1887	1
1888	4
1889	2
1891	1
1893	2
1894	4
1895	5
1896	2
1897	2
1898	1
1899	1
1900	13
1901	6
1902	9
1903	7
1904	11
1905	2
1906	24
1907	18
1908	5
1909	12
1910	50
1911	64
1912	5
1913	11
1914	45
1915	55
1916	74
1917	30
1918	42
1919	30
1920	26
1921	41
1922	33
1923	61
1924	92
1925	220
1926	133
1927	180
1928	160
1929	193
1930	475
1931	191
1932	460
1933	380
1934	390
1935	400
1936	282
1937	348
1938	382
1939	169
1940	315
1941	334
1942	421
1943	744
1944	496
1945	706
1946	651
1947	231
1948	426
1949	597
1950	473
1951	279
1952	493
1953	393
1954	498
1955	848
1956	795
1957	595
1958	334
1959	435
1960	404
1961	187
1962	1,199
1963	477
1964	329
1965	345
1966	438
1967	410
1968	817
1969	865
1970	703
1971	666
1972	499
1973	1,233
1974	1,097
1975	383
1976	733
1977	1,126
1978	1,090
1979	399
1980	614
1981	1,218
1982	452
1983	1,093
1984	717
1985	498
1986	1,131
1987	823
1988	1,154
1989	721
1990	753
1991	1,218
1992	921
1993	707
1994	1,015
1995	1,849
1996	1,767
1997	1,115
1998	1,060
1999	584
2000	922
2001	898
2002	1,833
2003	1,270
2004	847
2005	630
2006	1,493
2007	1,133
2008	999
2009	1,368
2010	894
2011	1,406
2012	523
2013	816
2014	609
2015	785
2016	597
2017	1,855
2018	557
2019	810
2020	706
2021	418
2022	711
2023	554
2024	551
2025	619
2026	1,131

Download the Data

Data for records on 1931-05-18: 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	135
10 to 20	12
20 to 30	4
30 to 40	1
40 to 50	0
50 to 60	1