Weather Records on 1 May 1938

304 weather records were set or tied worldwide on 1 May 1938. Highest significance: Coldwater, US.

Key Facts for 1 May 1938

On 1 May 1938, 304 weather records were set or tied at long-record stations worldwide.
177 were record highs and 20 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 302 daily.
Coldwater set a daily record precipitation of 66.0 mm (2.6 in) on 1 May 1938.
Across 165 earlier years (1795 to 2026) the same calendar date averaged 443 records.

Record Map

304 stations

304 station records on 1 May 1938 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 May 1938: highest significance records shown on the map
Station	Country	Type	Value	Significance
Coldwater	United States	Record daily precipitation	66.0 mm (2.6 in)	48 of 100 (Notable)
Idaho City	United States	Record daily precipitation	35.6 mm (1.4 in)	45 of 100 (Notable)
Chinook	United States	Record daily precipitation	33.5 mm (1.3 in)	45 of 100 (Notable)
Alix	Canada	Record daily precipitation	50.3 mm (2.0 in)	44 of 100 (Notable)
Emmett 2 E	United States	Record daily precipitation	27.9 mm (1.1 in)	44 of 100 (Notable)
Mangalore	India	Record daily precipitation	121.9 mm (4.8 in)	42 of 100 (Notable)
Sfax El-Maou	Tunisia	Record low maximum temperature	14.0 C (57.2 F)	32 of 100 (Routine)
Attingal	India	Record daily precipitation	114.3 mm (4.5 in)	31 of 100 (Routine)
Hillsdown	Canada	Record daily precipitation	30.5 mm (1.2 in)	30 of 100 (Routine)
Aloograda	India	Record daily precipitation	28.2 mm (1.1 in)	30 of 100 (Routine)
Concordia ASOS	United States	Record daily precipitation	46.2 mm (1.8 in)	30 of 100 (Routine)
Tribune 1W	United States	Record high minimum temperature	15.0 C (59.0 F)	26 of 100 (Routine)
Huntsville	Canada	Record low minimum temperature	-6.7 C (19.9 F)	25 of 100 (Routine)
Thiruvalla	India	Record daily precipitation	74.9 mm (2.9 in)	25 of 100 (Routine)
Athens	United States	Record high maximum temperature	31.1 C (88.0 F)	25 of 100 (Routine)
Wentworth 2.5 WNW	United States	Record high minimum temperature	17.2 C (63.0 F)	24 of 100 (Routine)
Grand Forks UNIV (NWS)	United States	Record daily precipitation	50.5 mm (2.0 in)	23 of 100 (Routine)
Lewistown AP	United States	Record high minimum temperature	7.8 C (46.0 F)	23 of 100 (Routine)
Flat Top Island	Australia	Record daily precipitation	33.3 mm (1.3 in)	22 of 100 (Routine)
Cape Sorell	Australia	Record daily precipitation	35.6 mm (1.4 in)	22 of 100 (Routine)
Mulki	India	Record daily precipitation	46.5 mm (1.8 in)	22 of 100 (Routine)
Karunagapalli	India	Record daily precipitation	61.0 mm (2.4 in)	22 of 100 (Routine)
Leavenworth	United States	Record high minimum temperature	22.8 C (73.0 F)	22 of 100 (Routine)
Chugwater	United States	Record high minimum temperature	10.6 C (51.1 F)	22 of 100 (Routine)
Caldwell	United States	Record daily precipitation	24.4 mm (1.0 in)	20 of 100 (Routine)
Salmon AP	United States	Record daily precipitation	18.8 mm (0.7 in)	20 of 100 (Routine)
Weissenburg	Germany	Record daily precipitation	18.9 mm (0.7 in)	20 of 100 (Routine)
Grafton	United States	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Canyon Ferry	United States	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
McGill	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Trier-Zewen	Germany	Record daily precipitation	19.0 mm (0.7 in)	20 of 100 (Routine)
Surgut	Russia	Record daily precipitation	6.2 mm (0.24 in)	20 of 100 (Routine)
Camp Crook	United States	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
New Meadows Rs	United States	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Ashland #2	United States	Record daily precipitation	19.6 mm (0.8 in)	20 of 100 (Routine)
Dawson (Anda-Vale)	Australia	Record daily precipitation	15.2 mm (0.6 in)	20 of 100 (Routine)
Fort Macleod	Canada	Record daily precipitation	20.8 mm (0.8 in)	20 of 100 (Routine)
Gleichen	Canada	Record daily precipitation	23.9 mm (0.9 in)	20 of 100 (Routine)
Moose Jaw Chab	Canada	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Durango	United States	Record daily precipitation	11.2 mm (0.4 in)	20 of 100 (Routine)
Inverell Comparison	Australia	Record high maximum temperature	27.2 C (81.0 F)	20 of 100 (Routine)
Paso Robles	United States	Record low maximum temperature	12.8 C (55.0 F)	20 of 100 (Routine)
Hot Springs	United States	Record high minimum temperature	14.4 C (57.9 F)	20 of 100 (Routine)
Saundatti	India	Record daily precipitation	28.2 mm (1.1 in)	19 of 100 (Routine)
Water Valley	United States	Record high minimum temperature	22.8 C (73.0 F)	19 of 100 (Routine)
Billings Wtp	United States	Record high minimum temperature	11.1 C (52.0 F)	19 of 100 (Routine)
Fairbury 7S	United States	Record high minimum temperature	17.8 C (64.0 F)	19 of 100 (Routine)
Fullerton 1 ESE	United States	Record high minimum temperature	12.2 C (54.0 F)	19 of 100 (Routine)
Ipswich	United States	Record high minimum temperature	13.3 C (55.9 F)	19 of 100 (Routine)
Milbank 4 NW	United States	Record high minimum temperature	16.7 C (62.1 F)	19 of 100 (Routine)
Battleford	Canada	Record daily precipitation	11.2 mm (0.4 in)	18 of 100 (Routine)
Anticosti SW Point	Canada	Record high maximum temperature	15.0 C (59.0 F)	18 of 100 (Routine)
Mudhol	India	Record daily precipitation	19.1 mm (0.8 in)	18 of 100 (Routine)
Shimoga	India	Record daily precipitation	30.0 mm (1.2 in)	18 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record daily precipitation	19.6 mm (0.8 in)	18 of 100 (Routine)
Columbus 4 ESE	United States	Record high minimum temperature	20.0 C (68.0 F)	18 of 100 (Routine)
Beaver City	United States	Record high minimum temperature	17.2 C (63.0 F)	18 of 100 (Routine)
Newkirk 5NE	United States	Record high minimum temperature	19.4 C (66.9 F)	18 of 100 (Routine)
Belle Fourche	United States	Record high minimum temperature	14.4 C (57.9 F)	18 of 100 (Routine)
Loretto	United States	Record daily precipitation	17.3 mm (0.7 in)	18 of 100 (Routine)

Counts by Type and Timescale

304 records

Records set or tied on 1 May 1938 by type: Highest daily maximum 36, Lowest daily maximum 12, Highest daily minimum 141, Lowest daily minimum 8, Heaviest daily rainfall 107.

Records on 1 May 1938 by type
Record type	Records
Highest daily maximum	36
Lowest daily maximum	12
Highest daily minimum	141
Lowest daily minimum	8
Heaviest daily rainfall	107
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 May 1938 by timescale: all-time 0, monthly 2, daily 302.

How Much Records Were Beaten By

243 broken records

Margins by which the 243 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 114.5. Ties are not counted.

Top 20 by Significance

1 May 1938

Top 20 records on 1 May 1938 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 May 1938	Coldwater, US	daily rain	66.0 mm (2.6 in)	62.2 mm (2.4 in)	16 years	48 of 100 (Notable)
1 May 1938	Idaho City, US	daily rain	35.6 mm (1.4 in)	19.9 mm (0.8 in)	41 years	45 of 100 (Notable)
1 May 1938	Chinook, US	daily rain	33.5 mm (1.3 in)	25.9 mm (1.0 in)	32 years	45 of 100 (Notable)
1 May 1938	Alix, CA	daily rain	50.3 mm (2.0 in)	36.8 mm (1.4 in)	4 years	44 of 100 (Notable)
1 May 1938	Emmett 2 E, US	daily rain	27.9 mm (1.1 in)	22.1 mm (0.9 in)	5 years	44 of 100 (Notable)
1 May 1938	Mangalore, IN	daily rain	121.9 mm (4.8 in)	114.5 mm (4.5 in)	7 years	42 of 100 (Notable)
1 May 1938	Sfax El-Maou, TN	monthly low max	14.0 C (57.2 F)	3.0 C (5.4 F)	28 years	32 of 100 (Routine)
1 May 1938	Attingal, IN	daily rain	114.3 mm (4.5 in)	44.4 mm (1.7 in)	35 years	31 of 100 (Routine)
1 May 1938	Hillsdown, CA	daily rain	30.5 mm (1.2 in)	15.3 mm (0.6 in)	4 years	30 of 100 (Routine)
1 May 1938	Aloograda, IN	daily rain	28.2 mm (1.1 in)	18.3 mm (0.7 in)	28 years	30 of 100 (Routine)
1 May 1938	Concordia ASOS, US	daily rain	46.2 mm (1.8 in)	25.4 mm (1.0 in)	15 years	30 of 100 (Routine)
1 May 1938	Tribune 1W, US	daily high min	15.0 C (59.0 F)	4.4 C (7.9 F)	42 years	26 of 100 (Routine)
1 May 1938	Huntsville, CA	daily low min	-6.7 C (19.9 F)	1.1 C (2.0 F)	57 years	25 of 100 (Routine)
1 May 1938	Thiruvalla, IN	daily rain	74.9 mm (2.9 in)	39.3 mm (1.5 in)	32 years	25 of 100 (Routine)
1 May 1938	Athens, US	daily high max	31.1 C (88.0 F)	0.5 C (0.9 F)	53 years	25 of 100 (Routine)
1 May 1938	Wentworth 2.5 WNW, US	daily high min	17.2 C (63.0 F)	4.4 C (7.9 F)	42 years	24 of 100 (Routine)
1 May 1938	Grand Forks UNIV (NWS), US	daily rain	50.5 mm (2.0 in)	9.4 mm (0.37 in)	36 years	23 of 100 (Routine)
1 May 1938	Lewistown AP, US	daily high min	7.8 C (46.0 F)	3.4 C (6.1 F)	36 years	23 of 100 (Routine)
1 May 1938	Flat Top Island, AU	daily rain	33.3 mm (1.3 in)	14.0 mm (0.6 in)	28 years	22 of 100 (Routine)
1 May 1938	Cape Sorell, AU	daily rain	35.6 mm (1.4 in)	12.7 mm (0.5 in)	0 years	22 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

1795 to 1938

Records set or tied on this calendar date in each year from 1795 to 1938. 1938 had 304 records.

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

Records on 05-01 in each year
Year	Records
1795	1
1802	1
1804	1
1814	1
1818	1
1835	1
1836	1
1840	1
1846	2
1847	1
1850	1
1851	1
1857	1
1860	1
1861	1
1864	2
1865	1
1868	2
1872	1
1875	4
1878	2
1879	2
1880	3
1881	2
1884	1
1885	1
1886	2
1887	2
1888	2
1889	3
1890	2
1891	5
1892	6
1893	2
1894	5
1896	1
1897	4
1898	1
1899	8
1900	1
1901	5
1902	7
1903	9
1904	9
1905	13
1906	12
1907	31
1908	20
1909	49
1910	13
1911	22
1912	18
1913	54
1914	23
1915	27
1916	27
1917	37
1918	34
1919	150
1920	186
1921	41
1922	92
1923	64
1924	63
1925	118
1926	500
1927	125
1928	190
1929	142
1930	263
1931	537
1932	220
1933	706
1934	305
1935	276
1936	368
1937	218
1938	304
1939	227
1940	731
1941	333
1942	1,036
1943	526
1944	229
1945	350
1946	415
1947	655
1948	774
1949	405
1950	439
1951	894
1952	557
1953	917
1954	1,506
1955	772
1956	1,106
1957	359
1958	448
1959	764
1960	737
1961	588
1962	615
1963	704
1964	312
1965	360
1966	707
1967	948
1968	426
1969	429
1970	1,075
1971	444
1972	562
1973	841
1974	589
1975	286
1976	673
1977	545
1978	1,202
1979	612
1980	507
1981	1,265
1982	508
1983	1,423
1984	640
1985	789
1986	512
1987	1,098
1988	1,058
1989	949
1990	922
1991	633
1992	1,201
1993	1,101
1994	1,210
1995	1,365
1996	1,439
1997	804
1998	951
1999	932
2000	809
2001	1,106
2002	1,221
2003	964
2004	887
2005	1,320
2006	734
2007	857
2008	979
2009	679
2010	1,151
2011	716
2012	796
2013	976
2014	941
2015	550
2016	844
2017	1,163
2018	519
2019	788
2020	1,099
2021	834
2022	319
2023	912
2024	458
2025	430
2026	623

Download the Data

Data for records on 1938-05-01: 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 20	231
20 to 40	9
40 to 60	1
60 to 80	1
80 to 100	0
100 to 120	1