Weather Records on 18 April 1933

211 weather records were set or tied worldwide on 18 April 1933. Highest significance: Madison Sewage Plt, US.

Key Facts for 18 April 1933

On 18 April 1933, 211 weather records were set or tied at long-record stations worldwide.
59 were record highs and 70 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 7 monthly and 204 daily.
Madison Sewage Plt set a daily record precipitation of 65.8 mm (2.6 in) on 18 April 1933.
Across 160 earlier years (1793 to 2026) the same calendar date averaged 469 records.

Record Map

211 stations

211 station records on 18 April 1933 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 April 1933: highest significance records shown on the map
Station	Country	Type	Value	Significance
Madison Sewage Plt	United States	Record daily precipitation	65.8 mm (2.6 in)	53 of 100 (Notable)
Portland	United States	Record daily precipitation	53.8 mm (2.1 in)	44 of 100 (Notable)
Markland Dam 39	United States	Record daily precipitation	54.6 mm (2.1 in)	41 of 100 (Notable)
Alton	Canada	Record daily precipitation	28.4 mm (1.1 in)	33 of 100 (Routine)
Franklin	United States	Record daily precipitation	27.9 mm (1.1 in)	29 of 100 (Routine)
Yarmouth	Canada	Record high maximum temperature	18.9 C (66.0 F)	28 of 100 (Routine)
Durham	United States	Record daily precipitation	44.7 mm (1.8 in)	27 of 100 (Routine)
San Diego Wbo	United States	Record low maximum temperature	12.8 C (55.0 F)	26 of 100 (Routine)
Falmouth	United States	Record daily precipitation	44.7 mm (1.8 in)	25 of 100 (Routine)
Sacramento 5 ESE	United States	Record low minimum temperature	3.3 C (37.9 F)	24 of 100 (Routine)
Hambledon Mill Csr	Australia	Record daily precipitation	76.2 mm (3.0 in)	22 of 100 (Routine)
Kingston Queens U	Canada	Record high minimum temperature	8.3 C (46.9 F)	22 of 100 (Routine)
Gudauri	Georgia	Record daily precipitation	28.2 mm (1.1 in)	22 of 100 (Routine)
Cambridge City 3 N	United States	Record daily precipitation	41.4 mm (1.6 in)	22 of 100 (Routine)
Lewiston	United States	Record daily precipitation	29.2 mm (1.1 in)	22 of 100 (Routine)
Salisbury	United States	Record high minimum temperature	11.1 C (52.0 F)	22 of 100 (Routine)
Williamstown	United States	Record daily precipitation	61.0 mm (2.4 in)	21 of 100 (Routine)
Chelsea	United States	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Harrisville	United States	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Plymouth	United States	Record daily precipitation	22.4 mm (0.9 in)	20 of 100 (Routine)
E Tawas	United States	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Hobart (Ellerslie Road)	Australia	Record low maximum temperature	11.3 C (52.3 F)	19 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record low minimum temperature	-11.2 C (11.8 F)	19 of 100 (Routine)
Bar Harbor 3 NW	United States	Record high minimum temperature	5.0 C (41.0 F)	19 of 100 (Routine)
Arnsberg	Germany	Record low minimum temperature	-4.1 C (24.6 F)	18 of 100 (Routine)
Mangalgiri	India	Record daily precipitation	8.6 mm (0.34 in)	18 of 100 (Routine)
Scottsburg	United States	Record daily precipitation	25.4 mm (1.0 in)	18 of 100 (Routine)
Saint Johnsbury	United States	Record daily precipitation	15.2 mm (0.6 in)	18 of 100 (Routine)
Cape York Post Office	Australia	Record daily precipitation	53.3 mm (2.1 in)	17 of 100 (Routine)
Fort Macleod	Canada	Record low minimum temperature	-13.3 C (8.1 F)	17 of 100 (Routine)
Lugano	Switzerland	Record high minimum temperature	12.4 C (54.3 F)	17 of 100 (Routine)
Norwalk	United States	Record high minimum temperature	11.1 C (52.0 F)	17 of 100 (Routine)
Seymour 1 WSW	United States	Record daily precipitation	32.5 mm (1.3 in)	17 of 100 (Routine)
El Dorado	United States	Record high maximum temperature	30.6 C (87.1 F)	17 of 100 (Routine)
Haverhill	United States	Record daily precipitation	26.7 mm (1.1 in)	17 of 100 (Routine)
W Pt	United States	Record high minimum temperature	12.2 C (54.0 F)	17 of 100 (Routine)
Fort Macleod	Canada	Record daily precipitation	10.2 mm (0.4 in)	16 of 100 (Routine)
Ottawa Cda	Canada	Record high minimum temperature	8.9 C (48.0 F)	16 of 100 (Routine)
Claremont Pomona Clg	United States	Record low minimum temperature	0.0 C (32.0 F)	16 of 100 (Routine)
Coldwater	United States	Record high maximum temperature	33.3 C (91.9 F)	16 of 100 (Routine)
Austin #2	United States	Record low maximum temperature	0.6 C (33.1 F)	16 of 100 (Routine)
Hanover	United States	Record daily precipitation	13.2 mm (0.5 in)	16 of 100 (Routine)
Charlotteburg Rsvr	United States	Record high minimum temperature	11.1 C (52.0 F)	16 of 100 (Routine)
Willow City	United States	Record high minimum temperature	8.9 C (48.0 F)	16 of 100 (Routine)
Marietta Wtr Wks	United States	Record daily precipitation	20.6 mm (0.8 in)	16 of 100 (Routine)
Cavendish	United States	Record daily precipitation	15.5 mm (0.6 in)	16 of 100 (Routine)
Northfield	United States	Record daily precipitation	11.7 mm (0.5 in)	16 of 100 (Routine)
Burketown Post Office	Australia	Record high maximum temperature	35.6 C (96.1 F)	15 of 100 (Routine)
Tuni	India	Record daily precipitation	9.4 mm (0.37 in)	15 of 100 (Routine)
Narasannapeta	India	Record daily precipitation	9.7 mm (0.38 in)	15 of 100 (Routine)
Cloverdale	United States	Record low minimum temperature	0.6 C (33.1 F)	15 of 100 (Routine)
El Cajon 2 E	United States	Record low maximum temperature	11.7 C (53.1 F)	15 of 100 (Routine)
Healdsburg	United States	Record low minimum temperature	-0.6 C (30.9 F)	15 of 100 (Routine)
Oakland	United States	Record low minimum temperature	3.9 C (39.0 F)	15 of 100 (Routine)
San Jacinto	United States	Record low maximum temperature	11.1 C (52.0 F)	15 of 100 (Routine)
Greensburg	United States	Record daily precipitation	48.0 mm (1.9 in)	15 of 100 (Routine)
Rumford	United States	Record daily precipitation	18.0 mm (0.7 in)	15 of 100 (Routine)
Williamstown	United States	Record high minimum temperature	10.6 C (51.1 F)	15 of 100 (Routine)
Urbana Wrf	United States	Record daily precipitation	26.2 mm (1.0 in)	15 of 100 (Routine)
Kingston	United States	Record high minimum temperature	10.0 C (50.0 F)	15 of 100 (Routine)

Counts by Type and Timescale

211 records

Records set or tied on 18 April 1933 by type: Highest daily maximum 20, Lowest daily maximum 30, Highest daily minimum 39, Lowest daily minimum 40, Heaviest daily rainfall 79, Heaviest daily snowfall 2, Deepest snow cover 1.

Records on 18 April 1933 by type
Record type	Records
Highest daily maximum	20
Lowest daily maximum	30
Highest daily minimum	39
Lowest daily minimum	40
Heaviest daily rainfall	79
Heaviest daily snowfall	2
Deepest snow cover	1

Records on 18 April 1933 by timescale: all-time 0, monthly 7, daily 204.

How Much Records Were Beaten By

171 broken records

Margins by which the 171 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 77.0. Ties are not counted.

Top 20 by Significance

18 April 1933

Top 20 records on 18 April 1933 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 April 1933	Madison Sewage Plt, US	daily rain	65.8 mm (2.6 in)	51.6 mm (2.0 in)	32 years	53 of 100 (Notable)
18 April 1933	Portland, US	daily rain	53.8 mm (2.1 in)	33.7 mm (1.3 in)	20 years	44 of 100 (Notable)
18 April 1933	Markland Dam 39, US	daily rain	54.6 mm (2.1 in)	34.3 mm (1.4 in)	32 years	41 of 100 (Notable)
18 April 1933	Alton, CA	daily rain	28.4 mm (1.1 in)	15.7 mm (0.6 in)	32 years	33 of 100 (Routine)
18 April 1933	Franklin, US	daily rain	27.9 mm (1.1 in)	20.5 mm (0.8 in)	20 years	29 of 100 (Routine)
18 April 1933	Yarmouth, CA	daily high max	18.9 C (66.0 F)	3.3 C (5.9 F)	43 years	28 of 100 (Routine)
18 April 1933	Durham, US	daily rain	44.7 mm (1.8 in)	17.8 mm (0.7 in)	32 years	27 of 100 (Routine)
18 April 1933	San Diego Wbo, US	daily low max	12.8 C (55.0 F)	1.6 C (2.9 F)	52 years	26 of 100 (Routine)
18 April 1933	Falmouth, US	daily rain	44.7 mm (1.8 in)	10.4 mm (0.4 in)	40 years	25 of 100 (Routine)
18 April 1933	Sacramento 5 ESE, US	daily low min	3.3 C (37.9 F)	1.1 C (2.0 F)	52 years	24 of 100 (Routine)
18 April 1933	Hambledon Mill Csr, AU	daily rain	76.2 mm (3.0 in)	43.2 mm (1.7 in)	28 years	22 of 100 (Routine)
18 April 1933	Kingston Queens U, CA	daily high min	8.3 C (46.9 F)	1.1 C (2.0 F)	46 years	22 of 100 (Routine)
18 April 1933	Gudauri, GE	daily rain	28.2 mm (1.1 in)	7.3 mm (0.29 in)	36 years	22 of 100 (Routine)
18 April 1933	Cambridge City 3 N, US	daily rain	41.4 mm (1.6 in)	8.9 mm (0.35 in)	32 years	22 of 100 (Routine)
18 April 1933	Lewiston, US	daily rain	29.2 mm (1.1 in)	14.0 mm (0.6 in)	16 years	22 of 100 (Routine)
18 April 1933	Salisbury, US	daily high min	11.1 C (52.0 F)	5.0 C (9.0 F)	32 years	22 of 100 (Routine)
18 April 1933	Williamstown, US	monthly rain	61.0 mm (2.4 in)	7.9 mm (0.31 in)	5 years	21 of 100 (Routine)
18 April 1933	Chelsea, US	daily rain	23.4 mm (0.9 in)	13.2 mm (0.5 in)	32 years	20 of 100 (Routine)
18 April 1933	Harrisville, US	daily rain	24.6 mm (1.0 in)	13.9 mm (0.5 in)	20 years	20 of 100 (Routine)
18 April 1933	Plymouth, US	daily rain	22.4 mm (0.9 in)	12.5 mm (0.5 in)	32 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

1793 to 1933

Records set or tied on this calendar date in each year from 1793 to 1933. 1933 had 211 records.

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

Records on 04-18 in each year
Year	Records
1793	1
1807	2
1815	1
1838	1
1847	1
1849	1
1851	1
1852	3
1854	3
1855	1
1865	4
1867	1
1870	1
1871	1
1875	4
1877	2
1878	1
1879	3
1880	2
1884	2
1886	2
1887	3
1888	1
1889	1
1890	2
1891	1
1892	3
1893	5
1894	7
1895	2
1896	3
1897	5
1898	8
1899	2
1900	2
1901	6
1902	5
1903	11
1904	9
1905	12
1906	18
1907	17
1908	37
1909	19
1910	19
1911	25
1912	21
1913	26
1914	38
1915	31
1916	22
1917	40
1918	76
1919	16
1920	64
1921	58
1922	85
1923	107
1924	101
1925	154
1926	322
1927	391
1928	323
1929	126
1930	113
1931	173
1932	326
1933	211
1934	391
1935	264
1936	483
1937	477
1938	711
1939	525
1940	322
1941	496
1942	287
1943	298
1944	259
1945	371
1946	357
1947	444
1948	932
1949	345
1950	244
1951	658
1952	536
1953	1,322
1954	442
1955	817
1956	467
1957	629
1958	370
1959	468
1960	320
1961	520
1962	484
1963	662
1964	449
1965	363
1966	776
1967	882
1968	867
1969	795
1970	771
1971	1,106
1972	470
1973	953
1974	326
1975	751
1976	1,309
1977	717
1978	803
1979	841
1980	842
1981	708
1982	616
1983	2,082
1984	625
1985	1,119
1986	622
1987	1,068
1988	936
1989	625
1990	1,368
1991	780
1992	702
1993	730
1994	1,218
1995	1,601
1996	826
1997	1,256
1998	1,011
1999	1,428
2000	912
2001	1,487
2002	2,084
2003	969
2004	846
2005	622
2006	1,262
2007	675
2008	913
2009	624
2010	478
2011	1,122
2012	744
2013	2,509
2014	534
2015	519
2016	973
2017	588
2018	1,202
2019	601
2020	770
2021	592
2022	1,013
2023	739
2024	641
2025	997
2026	498

Download the Data

Data for records on 1933-04-18: 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	152
10 to 20	11
20 to 30	3
30 to 40	2
40 to 50	1
50 to 60	1
60 to 70	0
70 to 80	1