Weather Records on 18 May 1948

426 weather records were set or tied worldwide on 18 May 1948. Highest significance: Woodland, US.

Key Facts for 18 May 1948

On 18 May 1948, 426 weather records were set or tied at long-record stations worldwide.
275 were record highs and 69 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 21 monthly and 405 daily.
Woodland set a monthly record daily precipitation of 71.9 mm (2.8 in) on 18 May 1948.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 443 records.

Record Map

426 stations

426 station records on 18 May 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 May 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Woodland	United States	Record daily precipitation	71.9 mm (2.8 in)	53 of 100 (Notable)
Skukuza	South Africa	Record daily precipitation	26.0 mm (1.0 in)	46 of 100 (Notable)
Quebec	Canada	Record daily precipitation	32.3 mm (1.3 in)	41 of 100 (Notable)
Disraeli	Canada	Record daily precipitation	36.6 mm (1.4 in)	38 of 100 (Notable)
Natashquan A	Canada	Record daily precipitation	37.1 mm (1.5 in)	35 of 100 (Notable)
Princeton	United States	Record daily precipitation	79.2 mm (3.1 in)	35 of 100 (Notable)
Sydney (Observatory Hill)	Australia	Record low minimum temperature	6.7 C (44.1 F)	34 of 100 (Routine)
Evanston 1 E	United States	Record high maximum temperature	31.1 C (88.0 F)	34 of 100 (Routine)
Framingham	United States	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Cap Chat	Canada	Record daily precipitation	36.6 mm (1.4 in)	32 of 100 (Routine)
Causapscal	Canada	Record daily precipitation	47.0 mm (1.9 in)	31 of 100 (Routine)
Edmundston	Canada	Record daily precipitation	42.4 mm (1.7 in)	31 of 100 (Routine)
Houlton	United States	Record daily precipitation	46.2 mm (1.8 in)	31 of 100 (Routine)
Aztec Ruins Nm	United States	Record high minimum temperature	15.0 C (59.0 F)	31 of 100 (Routine)
Waterville Wwtp	United States	Record daily precipitation	72.4 mm (2.9 in)	29 of 100 (Routine)
Poplar 2 E	United States	Record high maximum temperature	37.2 C (99.0 F)	29 of 100 (Routine)
Murray Island	Australia	Record daily precipitation	41.4 mm (1.6 in)	28 of 100 (Routine)
Colusa Brg	United States	Record daily precipitation	28.4 mm (1.1 in)	28 of 100 (Routine)
Durango	United States	Record high minimum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Kimball 2NE	United States	Record high minimum temperature	12.8 C (55.0 F)	28 of 100 (Routine)
Armagh	Canada	Record daily precipitation	36.3 mm (1.4 in)	27 of 100 (Routine)
Oracle	United States	Record high minimum temperature	20.6 C (69.1 F)	27 of 100 (Routine)
Susanville 2SW	United States	Record low maximum temperature	7.2 C (45.0 F)	27 of 100 (Routine)
Steele 4N	United States	Record high minimum temperature	19.4 C (66.9 F)	27 of 100 (Routine)
Gardiner	United States	Record daily precipitation	59.7 mm (2.4 in)	26 of 100 (Routine)
Fruitland	United States	Record high minimum temperature	16.1 C (61.0 F)	26 of 100 (Routine)
Ft Morgan	United States	Record high minimum temperature	11.7 C (53.1 F)	25 of 100 (Routine)
Westcliffe	United States	Record high minimum temperature	12.2 C (54.0 F)	25 of 100 (Routine)
Glendive	United States	Record high maximum temperature	39.4 C (102.9 F)	25 of 100 (Routine)
Lodgepole	United States	Record high minimum temperature	15.6 C (60.1 F)	25 of 100 (Routine)
Bic	Canada	Record daily precipitation	50.8 mm (2.0 in)	24 of 100 (Routine)
Gray	United States	Record high minimum temperature	16.7 C (62.1 F)	24 of 100 (Routine)
Rockport 1 ESE	United States	Record daily precipitation	42.9 mm (1.7 in)	24 of 100 (Routine)
Purdum	United States	Record high minimum temperature	17.8 C (64.0 F)	24 of 100 (Routine)
Anticosti SW Point	Canada	Record daily precipitation	33.0 mm (1.3 in)	23 of 100 (Routine)
Timovskoe	Russia	Record high minimum temperature	7.0 C (44.6 F)	23 of 100 (Routine)
Casa Grande	United States	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Culbertson	United States	Record high maximum temperature	36.7 C (98.1 F)	23 of 100 (Routine)
Oelrichs	United States	Record high minimum temperature	18.9 C (66.0 F)	23 of 100 (Routine)
Regina Int'l A	Canada	Record high maximum temperature	32.8 C (91.0 F)	22 of 100 (Routine)
Vacaville	United States	Record low maximum temperature	15.6 C (60.1 F)	22 of 100 (Routine)
Ft Robinson	United States	Record high minimum temperature	18.9 C (66.0 F)	22 of 100 (Routine)
Mitchell 5E	United States	Record high minimum temperature	16.7 C (62.1 F)	22 of 100 (Routine)
Ashley	United States	Record high minimum temperature	16.1 C (61.0 F)	22 of 100 (Routine)
Westhope	United States	Record high minimum temperature	14.4 C (57.9 F)	22 of 100 (Routine)
Lakeview 2 NNW	United States	Record low maximum temperature	4.4 C (39.9 F)	22 of 100 (Routine)
Levan	United States	Record high minimum temperature	13.9 C (57.0 F)	22 of 100 (Routine)
Snowville	United States	Record high minimum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Gillette 3SE	United States	Record high maximum temperature	33.3 C (91.9 F)	22 of 100 (Routine)
Sacramento 5 ESE	United States	Record low maximum temperature	15.0 C (59.0 F)	22 of 100 (Routine)
Golden A	Canada	Record high minimum temperature	9.4 C (48.9 F)	21 of 100 (Routine)
Qu'appelle	Canada	Record high maximum temperature	31.7 C (89.1 F)	21 of 100 (Routine)
Chaplin	Canada	Record high maximum temperature	32.8 C (91.0 F)	21 of 100 (Routine)
Stornoway Airport	United Kingdom	Record high maximum temperature	20.6 C (69.1 F)	21 of 100 (Routine)
Collbran	United States	Record high minimum temperature	13.3 C (55.9 F)	21 of 100 (Routine)
Glendive	United States	Record high minimum temperature	16.1 C (61.0 F)	21 of 100 (Routine)
Alliance 1WNW	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)
Los Lunas	United States	Record high maximum temperature	34.4 C (93.9 F)	21 of 100 (Routine)
Brownwood 2NE	United States	Record high minimum temperature	21.7 C (71.1 F)	21 of 100 (Routine)
Elberta	United States	Record high minimum temperature	17.2 C (63.0 F)	21 of 100 (Routine)

Counts by Type and Timescale

426 records

Records set or tied on 18 May 1948 by type: Highest daily maximum 102, Lowest daily maximum 45, Highest daily minimum 173, Lowest daily minimum 24, Heaviest daily rainfall 78, Heaviest daily snowfall 4.

Records on 18 May 1948 by type
Record type	Records
Highest daily maximum	102
Lowest daily maximum	45
Highest daily minimum	173
Lowest daily minimum	24
Heaviest daily rainfall	78
Heaviest daily snowfall	4
Deepest snow cover	0

Records on 18 May 1948 by timescale: all-time 0, monthly 21, daily 405.

How Much Records Were Beaten By

336 broken records

Margins by which the 336 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 51.0. Ties are not counted.

Top 20 by Significance

18 May 1948

Top 20 records on 18 May 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 May 1948	Woodland, US	monthly rain	71.9 mm (2.8 in)	30.0 mm (1.2 in)	28 years	53 of 100 (Notable)
18 May 1948	Skukuza, ZA	daily rain	26.0 mm (1.0 in)	24.0 mm (0.9 in)	29 years	46 of 100 (Notable)
18 May 1948	Quebec, CA	daily rain	32.3 mm (1.3 in)	9.4 mm (0.37 in)	73 years	41 of 100 (Notable)
18 May 1948	Disraeli, CA	daily rain	36.6 mm (1.4 in)	24.2 mm (1.0 in)	1 year	38 of 100 (Notable)
18 May 1948	Natashquan A, CA	daily rain	37.1 mm (1.5 in)	21.6 mm (0.9 in)	23 years	35 of 100 (Notable)
18 May 1948	Princeton, US	daily rain	79.2 mm (3.1 in)	43.6 mm (1.7 in)	2 years	35 of 100 (Notable)
18 May 1948	Sydney (Observatory Hill), AU	daily low min	6.7 C (44.1 F)	1.0 C (1.8 F)	72 years	34 of 100 (Routine)
18 May 1948	Evanston 1 E, US	monthly high max	31.1 C (88.0 F)	1.7 C (3.1 F)	55 years	34 of 100 (Routine)
18 May 1948	Framingham, US	daily rain	27.9 mm (1.1 in)	19.0 mm (0.7 in)	44 years	33 of 100 (Routine)
18 May 1948	Cap Chat, CA	daily rain	36.6 mm (1.4 in)	7.9 mm (0.31 in)	59 years	32 of 100 (Routine)
18 May 1948	Causapscal, CA	monthly rain	47.0 mm (1.9 in)	8.1 mm (0.32 in)	25 years	31 of 100 (Routine)
18 May 1948	Edmundston, CA	daily rain	42.4 mm (1.7 in)	18.5 mm (0.7 in)	29 years	31 of 100 (Routine)
18 May 1948	Houlton, US	daily rain	46.2 mm (1.8 in)	16.2 mm (0.6 in)	29 years	31 of 100 (Routine)
18 May 1948	Aztec Ruins Nm, US	monthly high min	15.0 C (59.0 F)	0.6 C (1.1 F)	51 years	31 of 100 (Routine)
18 May 1948	Waterville Wwtp, US	monthly rain	72.4 mm (2.9 in)	8.4 mm (0.33 in)	25 years	29 of 100 (Routine)
18 May 1948	Poplar 2 E, US	daily high max	37.2 C (99.0 F)	5.5 C (9.9 F)	54 years	29 of 100 (Routine)
18 May 1948	Murray Island, AU	daily rain	41.4 mm (1.6 in)	28.2 mm (1.1 in)	20 years	28 of 100 (Routine)
18 May 1948	Colusa Brg, US	daily rain	28.4 mm (1.1 in)	12.7 mm (0.5 in)	4 years	28 of 100 (Routine)
18 May 1948	Durango, US	daily high min	10.6 C (51.1 F)	2.8 C (5.0 F)	50 years	28 of 100 (Routine)
18 May 1948	Kimball 2NE, US	daily high min	12.8 C (55.0 F)	3.4 C (6.1 F)	50 years	28 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 1948

Records set or tied on this calendar date in each year from 1796 to 1948. 1948 had 426 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 1948-05-18: 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	311
10 to 20	16
20 to 30	6
30 to 40	1
40 to 50	1
50 to 60	1