Weather Records on 18 May 1927

180 weather records were set or tied worldwide on 18 May 1927. Highest significance: Delphi 2 N, US.

Key Facts for 18 May 1927

On 18 May 1927, 180 weather records were set or tied at long-record stations worldwide.
69 were record highs and 48 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 9 monthly and 171 daily.
Delphi 2 N set a daily record precipitation of 71.1 mm (2.8 in) on 18 May 1927.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 444 records.

Record Map

180 stations

180 station records on 18 May 1927 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1927: highest significance records shown on the map
Station	Country	Type	Value	Significance
Delphi 2 N	United States	Record daily precipitation	71.1 mm (2.8 in)	51 of 100 (Notable)
Bonaparte 5 NE	United States	Record daily precipitation	77.5 mm (3.1 in)	48 of 100 (Notable)
Geilo	Norway	Record snow depth	136.0 cm (53.5 in)	43 of 100 (Notable)
Grundy Ctr	United States	Record daily precipitation	54.6 mm (2.1 in)	36 of 100 (Notable)
Minonk	United States	Record daily precipitation	73.7 mm (2.9 in)	35 of 100 (Notable)
Welshpool	Australia	Record daily precipitation	36.1 mm (1.4 in)	32 of 100 (Routine)
Galva	United States	Record daily precipitation	64.3 mm (2.5 in)	31 of 100 (Routine)
Richmond Wtr Wks	United States	Record daily precipitation	42.9 mm (1.7 in)	31 of 100 (Routine)
Bloomington Normal	United States	Record daily precipitation	99.1 mm (3.9 in)	30 of 100 (Routine)
Ottumwa 1 WSW	United States	Record daily precipitation	56.6 mm (2.2 in)	30 of 100 (Routine)
Tiskilwa 2 SE	United States	Record daily precipitation	42.2 mm (1.7 in)	28 of 100 (Routine)
Mt Pleasant 1 SW	United States	Record daily precipitation	49.0 mm (1.9 in)	28 of 100 (Routine)
Warrenton 1 N	United States	Record high minimum temperature	25.0 C (77.0 F)	26 of 100 (Routine)
Rushville	United States	Record daily precipitation	43.9 mm (1.7 in)	25 of 100 (Routine)
Lyndoch	Australia	Record daily precipitation	25.4 mm (1.0 in)	23 of 100 (Routine)
Sedan	United States	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Stuttgart	United States	Record high minimum temperature	26.1 C (79.0 F)	22 of 100 (Routine)
La Harpe	United States	Record daily precipitation	53.8 mm (2.1 in)	22 of 100 (Routine)
New Westminster	Canada	Record low maximum temperature	11.7 C (53.1 F)	21 of 100 (Routine)
Stockholm	Sweden	Record daily precipitation	13.6 mm (0.5 in)	20 of 100 (Routine)
Visby_Flygplats	Sweden	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Regina Int'l A	Canada	Record daily snowfall	3.3 cm (1.3 in)	20 of 100 (Routine)
Swift Current	Canada	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
New Martinsville 4 NNE	United States	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Rockville	United States	Record daily precipitation	31.5 mm (1.2 in)	19 of 100 (Routine)
Alexandria 4 WSW	United States	Record daily precipitation	24.1 mm (0.9 in)	19 of 100 (Routine)
Joseph	United States	Record low minimum temperature	-6.7 C (19.9 F)	19 of 100 (Routine)
Collingrove	Australia	Record daily precipitation	15.7 mm (0.6 in)	18 of 100 (Routine)
Linkoeping-Malmslaett	Sweden	Record low maximum temperature	6.4 C (43.5 F)	18 of 100 (Routine)
Medicine Lodge	United States	Record high minimum temperature	22.8 C (73.0 F)	18 of 100 (Routine)
Crosbyton	United States	Record high maximum temperature	38.3 C (100.9 F)	18 of 100 (Routine)
Havana	United States	Record daily precipitation	26.7 mm (1.1 in)	17 of 100 (Routine)
Anderson 1 N	United States	Record daily precipitation	22.4 mm (0.9 in)	17 of 100 (Routine)
Jeffersonville	United States	Record daily precipitation	19.6 mm (0.8 in)	17 of 100 (Routine)
Salem	United States	Record daily precipitation	28.2 mm (1.1 in)	17 of 100 (Routine)
Kamloops	Canada	Record low maximum temperature	11.7 C (53.1 F)	16 of 100 (Routine)
Arkansas City	United States	Record daily precipitation	21.3 mm (0.8 in)	16 of 100 (Routine)
Cheyenne Wells 2NE	United States	Record high minimum temperature	15.6 C (60.1 F)	16 of 100 (Routine)
Pratt 3NW	United States	Record high minimum temperature	21.7 C (71.1 F)	16 of 100 (Routine)
Enosburg Falls	United States	Record daily precipitation	17.5 mm (0.7 in)	16 of 100 (Routine)
Aberdeen	United States	Record low maximum temperature	10.0 C (50.0 F)	16 of 100 (Routine)
Fort Macleod	Canada	Record daily precipitation	22.6 mm (0.9 in)	15 of 100 (Routine)
Lake Moraine	United States	Record high minimum temperature	8.9 C (48.0 F)	15 of 100 (Routine)
Morrisonville 4 SE	United States	Record daily precipitation	27.9 mm (1.1 in)	15 of 100 (Routine)
Lakin	United States	Record high minimum temperature	18.9 C (66.0 F)	15 of 100 (Routine)
Yates Ctr	United States	Record high minimum temperature	21.7 C (71.1 F)	15 of 100 (Routine)
Las Vegas 2 NW	United States	Record high minimum temperature	13.9 C (57.0 F)	15 of 100 (Routine)
Socorro	United States	Record high maximum temperature	36.7 C (98.1 F)	15 of 100 (Routine)
Stillwater 2 W	United States	Record high minimum temperature	23.3 C (73.9 F)	15 of 100 (Routine)
Burlington	United States	Record daily precipitation	13.0 mm (0.5 in)	15 of 100 (Routine)
Lake Charles Chenault	United States	Record high minimum temperature	23.3 C (73.9 F)	15 of 100 (Routine)
Rocky Ford 2 SE	United States	Record high minimum temperature	20.0 C (68.0 F)	14 of 100 (Routine)
Gainesville UNIV of Fl	United States	Record low minimum temperature	11.1 C (52.0 F)	14 of 100 (Routine)
Albia 3 NNE	United States	Record daily precipitation	41.1 mm (1.6 in)	14 of 100 (Routine)
Emporia 1 S	United States	Record high minimum temperature	22.8 C (73.0 F)	14 of 100 (Routine)
Jefferson 3SE	United States	Record high minimum temperature	23.3 C (73.9 F)	14 of 100 (Routine)
Forest Grove	United States	Record low maximum temperature	12.2 C (54.0 F)	14 of 100 (Routine)
College STN 6 SW	United States	Record high minimum temperature	23.9 C (75.0 F)	14 of 100 (Routine)
Haskell	United States	Record high maximum temperature	37.8 C (100.0 F)	14 of 100 (Routine)
Fort Laramie	United States	Record high maximum temperature	32.2 C (90.0 F)	14 of 100 (Routine)

Counts by Type and Timescale

180 records

Records set or tied on 18 May 1927 by type: Highest daily maximum 22, Lowest daily maximum 24, Highest daily minimum 47, Lowest daily minimum 24, Heaviest daily rainfall 57, Heaviest daily snowfall 1, Deepest snow cover 5.

Records on 18 May 1927 by type
Record type	Records
Highest daily maximum	22
Lowest daily maximum	24
Highest daily minimum	47
Lowest daily minimum	24
Heaviest daily rainfall	57
Heaviest daily snowfall	1
Deepest snow cover	5

Records on 18 May 1927 by timescale: all-time 0, monthly 9, daily 171.

How Much Records Were Beaten By

139 broken records

Margins by which the 139 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 1100.0. Ties are not counted.

Top 20 by Significance

18 May 1927

Top 20 records on 18 May 1927 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1927	Delphi 2 N, US	daily rain	71.1 mm (2.8 in)	42.9 mm (1.7 in)	30 years	51 of 100 (Notable)
18 May 1927	Bonaparte 5 NE, US	daily rain	77.5 mm (3.1 in)	57.2 mm (2.3 in)	18 years	48 of 100 (Notable)
18 May 1927	Geilo, NO	daily snow depth	136.0 cm (53.5 in)	110.0 cm (43.3 in)	0 years	43 of 100 (Notable)
18 May 1927	Grundy Ctr, US	daily rain	54.6 mm (2.1 in)	34.3 mm (1.4 in)	16 years	36 of 100 (Notable)
18 May 1927	Minonk, US	monthly rain	73.7 mm (2.9 in)	16.5 mm (0.6 in)	19 years	35 of 100 (Notable)
18 May 1927	Welshpool, AU	daily rain	36.1 mm (1.4 in)	18.8 mm (0.7 in)	13 years	32 of 100 (Routine)
18 May 1927	Galva, US	monthly rain	64.3 mm (2.5 in)	12.7 mm (0.5 in)	17 years	31 of 100 (Routine)
18 May 1927	Richmond Wtr Wks, US	daily rain	42.9 mm (1.7 in)	20.5 mm (0.8 in)	20 years	31 of 100 (Routine)
18 May 1927	Bloomington Normal, US	monthly rain	99.1 mm (3.9 in)	19.6 mm (0.8 in)	4 years	30 of 100 (Routine)
18 May 1927	Ottumwa 1 WSW, US	daily rain	56.6 mm (2.2 in)	24.8 mm (1.0 in)	28 years	30 of 100 (Routine)
18 May 1927	Tiskilwa 2 SE, US	daily rain	42.2 mm (1.7 in)	17.1 mm (0.7 in)	30 years	28 of 100 (Routine)
18 May 1927	Mt Pleasant 1 SW, US	daily rain	49.0 mm (1.9 in)	27.7 mm (1.1 in)	8 years	28 of 100 (Routine)
18 May 1927	Warrenton 1 N, US	monthly high min	25.0 C (77.0 F)	2.2 C (4.0 F)	30 years	26 of 100 (Routine)
18 May 1927	Rushville, US	daily rain	43.9 mm (1.7 in)	18.0 mm (0.7 in)	30 years	25 of 100 (Routine)
18 May 1927	Lyndoch, AU	daily rain	25.4 mm (1.0 in)	8.6 mm (0.34 in)	26 years	23 of 100 (Routine)
18 May 1927	Sedan, US	monthly high min	22.8 C (73.0 F)	0.6 C (1.1 F)	30 years	23 of 100 (Routine)
18 May 1927	Stuttgart, US	daily high min	26.1 C (79.0 F)	4.4 C (7.9 F)	28 years	22 of 100 (Routine)
18 May 1927	La Harpe, US	daily rain	53.8 mm (2.1 in)	15.7 mm (0.6 in)	30 years	22 of 100 (Routine)
18 May 1927	New Westminster, CA	daily low max	11.7 C (53.1 F)	1.1 C (2.0 F)	48 years	21 of 100 (Routine)
18 May 1927	Stockholm, SE	daily rain	13.6 mm (0.5 in)	5.6 mm (0.22 in)	41 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 1927

Records set or tied on this calendar date in each year from 1796 to 1927. 1927 had 180 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 1927-05-18: 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 200	138
200 to 400	0
400 to 600	0
600 to 800	0
800 to 1000	0
1000 to 1200	1