Weather Records on 31 March 1918

42 weather records were set or tied worldwide on 31 March 1918. Highest significance: Milan, IT.

Key Facts for 31 March 1918

On 31 March 1918, 42 weather records were set or tied at long-record stations worldwide.
34 were record highs and 1 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 1 monthly and 41 daily.
Milan set a daily record low minimum temperature of -0.8 C (30.6 F) on 31 March 1918.
Across 155 earlier years (1808 to 2026) the same calendar date averaged 509 records.

Record Map

42 stations

42 station records on 31 March 1918 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 March 1918: highest significance records shown on the map
Station	Country	Type	Value	Significance
Milan	Italy	Record low minimum temperature	-0.8 C (30.6 F)	25 of 100 (Routine)
Saint John	Canada	Record high maximum temperature	12.8 C (55.0 F)	22 of 100 (Routine)
Buffalo	United States	Record high minimum temperature	8.3 C (46.9 F)	22 of 100 (Routine)
Gorki	Belarus	Record daily precipitation	14.8 mm (0.6 in)	20 of 100 (Routine)
Port Alfred	South Africa	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Hamilton	Canada	Record high maximum temperature	20.0 C (68.0 F)	20 of 100 (Routine)
Escanaba	United States	Record high maximum temperature	16.7 C (62.1 F)	19 of 100 (Routine)
Milwaukee Wb City	United States	Record high minimum temperature	7.8 C (46.0 F)	16 of 100 (Routine)
Stonecliffe	Canada	Record high maximum temperature	14.4 C (57.9 F)	15 of 100 (Routine)
Portland	United States	Record high maximum temperature	19.4 C (66.9 F)	15 of 100 (Routine)
Stratford	Canada	Record high minimum temperature	3.3 C (37.9 F)	14 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high minimum temperature	5.0 C (41.0 F)	13 of 100 (Routine)
Madison Wb City	United States	Record high minimum temperature	6.7 C (44.1 F)	12 of 100 (Routine)
Green Bay	United States	Record high maximum temperature	18.3 C (64.9 F)	11 of 100 (Routine)
Morden	Canada	Record daily snowfall	5.3 cm (2.1 in)	10 of 100 (Routine)
Ny City Cntrl Park	United States	Record high maximum temperature	20.6 C (69.1 F)	10 of 100 (Routine)
Alma	United States	Record high maximum temperature	21.7 C (71.1 F)	9 of 100 (Routine)
Edmonton	Canada	Record daily precipitation	0.8 mm (0.03 in)	8 of 100 (Routine)
Edmonton	Canada	Record daily snowfall	0.8 cm (0.3 in)	8 of 100 (Routine)
London South	Canada	Record high maximum temperature	20.6 C (69.1 F)	8 of 100 (Routine)
Stratford	Canada	Record high maximum temperature	19.4 C (66.9 F)	8 of 100 (Routine)
Storrs	United States	Record high maximum temperature	19.4 C (66.9 F)	8 of 100 (Routine)
Blue Hill Coop	United States	Record high maximum temperature	18.9 C (66.0 F)	8 of 100 (Routine)
Morris W Cntrl Rsch & Outreach	United States	Record high maximum temperature	20.6 C (69.1 F)	8 of 100 (Routine)
La Crosse Wb City	United States	Record high maximum temperature	18.3 C (64.9 F)	8 of 100 (Routine)
Madison Wb City	United States	Record high maximum temperature	20.6 C (69.1 F)	8 of 100 (Routine)
Owen Sound	Canada	Record high maximum temperature	18.3 C (64.9 F)	7 of 100 (Routine)
Montgomery Wb City	United States	Record daily precipitation	20.6 mm (0.8 in)	7 of 100 (Routine)
Portland	United States	Record high minimum temperature	6.1 C (43.0 F)	7 of 100 (Routine)
Woodside	Australia	Record daily precipitation	0.8 mm (0.03 in)	5 of 100 (Routine)
Welland	Canada	Record high maximum temperature	18.9 C (66.0 F)	4 of 100 (Routine)
Concord	United States	Record high maximum temperature	18.3 C (64.9 F)	4 of 100 (Routine)
Stony Mountain	Canada	Record high maximum temperature	13.9 C (57.0 F)	3 of 100 (Routine)
Port Arthur	Canada	Record high minimum temperature	1.1 C (34.0 F)	1 of 100 (Routine)
Gravenhurst	Canada	Record high maximum temperature	15.6 C (60.1 F)	1 of 100 (Routine)
Brantford	Canada	Record high maximum temperature	19.4 C (66.9 F)	1 of 100 (Routine)
Setauket Strong	United States	Record high maximum temperature	18.9 C (66.0 F)	1 of 100 (Routine)
Northfield	United States	Record high maximum temperature	15.6 C (60.1 F)	1 of 100 (Routine)
Milwaukee Wb City	United States	Record high maximum temperature	21.7 C (71.1 F)	1 of 100 (Routine)
Dubuque River	United States	Record high maximum temperature	21.7 C (71.1 F)	1 of 100 (Routine)
Haliburton A	Canada	Record high maximum temperature	13.9 C (57.0 F)	0 of 100 (Routine)
Harrisburg - Coop	United States	Record high maximum temperature	22.8 C (73.0 F)	0 of 100 (Routine)

Counts by Type and Timescale

42 records

Records set or tied on 31 March 1918 by type: Highest daily maximum 27, Highest daily minimum 7, Lowest daily minimum 1, Heaviest daily rainfall 5, Heaviest daily snowfall 2.

Records on 31 March 1918 by type
Record type	Records
Highest daily maximum	27
Lowest daily maximum	0
Highest daily minimum	7
Lowest daily minimum	1
Heaviest daily rainfall	5
Heaviest daily snowfall	2
Deepest snow cover	0

Records on 31 March 1918 by timescale: all-time 0, monthly 1, daily 41.

How Much Records Were Beaten By

30 broken records

Margins by which the 30 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 28.0. Ties are not counted.

Top 20 by Significance

31 March 1918

Top 20 records on 31 March 1918 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 March 1918	Milan, IT	daily low min	-0.8 C (30.6 F)	0.2 C (0.4 F)	52 years	25 of 100 (Routine)
31 March 1918	Saint John, CA	monthly high max	12.8 C (55.0 F)	1.1 C (2.0 F)	20 years	22 of 100 (Routine)
31 March 1918	Buffalo, US	daily high min	8.3 C (46.9 F)	3.3 C (5.9 F)	42 years	22 of 100 (Routine)
31 March 1918	Gorki, BY	daily rain	14.8 mm (0.6 in)	7.0 mm (0.28 in)	21 years	20 of 100 (Routine)
31 March 1918	Port Alfred, ZA	daily rain	22.9 mm (0.9 in)	17.1 mm (0.7 in)	25 years	20 of 100 (Routine)
31 March 1918	Hamilton, CA	daily high max	20.0 C (68.0 F)	1.1 C (2.0 F)	49 years	20 of 100 (Routine)
31 March 1918	Escanaba, US	daily high max	16.7 C (62.1 F)	4.5 C (8.1 F)	23 years	19 of 100 (Routine)
31 March 1918	Milwaukee Wb City, US	daily high min	7.8 C (46.0 F)	2.8 C (5.0 F)	23 years	16 of 100 (Routine)
31 March 1918	Stonecliffe, CA	daily high max	14.4 C (57.9 F)	0.5 C (0.9 F)	39 years	15 of 100 (Routine)
31 March 1918	Portland, US	daily high max	19.4 C (66.9 F)	5.0 C (9.0 F)	5 years	15 of 100 (Routine)
31 March 1918	Stratford, CA	daily high min	3.3 C (37.9 F)	0.5 C (0.9 F)	31 years	14 of 100 (Routine)
31 March 1918	Morris W Cntrl Rsch & Outreach, US	daily high min	5.0 C (41.0 F)	2.8 C (5.0 F)	25 years	13 of 100 (Routine)
31 March 1918	Madison Wb City, US	daily high min	6.7 C (44.1 F)	2.3 C (4.1 F)	15 years	12 of 100 (Routine)
31 March 1918	Green Bay, US	daily high max	18.3 C (64.9 F)	3.9 C (7.0 F)	8 years	11 of 100 (Routine)
31 March 1918	Morden, CA	daily snowfall	5.3 cm (2.1 in)	2.8 cm (1.1 in)	16 years	10 of 100 (Routine)
31 March 1918	Ny City Cntrl Park, US	daily high max	20.6 C (69.1 F)	2.3 C (4.1 F)	5 years	10 of 100 (Routine)
31 March 1918	Alma, US	daily high max	21.7 C (71.1 F)	2.3 C (4.1 F)	12 years	9 of 100 (Routine)
31 March 1918	Edmonton, CA	daily rain	0.8 mm (0.03 in)	0.3 mm (0.01 in)	16 years	8 of 100 (Routine)
31 March 1918	Edmonton, CA	daily snowfall	0.8 cm (0.3 in)	0.3 cm (0.1 in)	16 years	8 of 100 (Routine)
31 March 1918	London South, CA	daily high max	20.6 C (69.1 F)	1.7 C (3.1 F)	12 years	8 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

1808 to 1918

Records set or tied on this calendar date in each year from 1808 to 1918. 1918 had 42 records.

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

Records on 03-31 in each year
Year	Records
1808	2
1815	2
1843	1
1848	1
1850	1
1854	1
1855	3
1856	2
1859	3
1865	2
1869	1
1872	4
1873	1
1874	1
1876	1
1878	1
1880	2
1881	1
1883	1
1887	2
1889	1
1890	1
1891	1
1892	2
1893	3
1896	3
1897	2
1898	5
1899	3
1900	9
1901	7
1902	3
1903	14
1904	16
1905	29
1906	10
1907	11
1908	5
1909	4
1910	45
1911	24
1912	18
1913	62
1914	16
1915	57
1916	17
1917	52
1918	42
1919	86
1920	65
1921	238
1922	102
1923	459
1924	160
1925	110
1926	306
1927	198
1928	98
1929	323
1930	137
1931	365
1932	360
1933	311
1934	181
1935	310
1936	1,242
1937	258
1938	649
1939	197
1940	697
1941	250
1942	245
1943	794
1944	327
1945	778
1946	897
1947	658
1948	355
1949	452
1950	579
1951	490
1952	382
1953	302
1954	549
1955	286
1956	767
1957	373
1958	414
1959	622
1960	327
1961	525
1962	547
1963	987
1964	1,345
1965	457
1966	845
1967	1,025
1968	504
1969	1,126
1970	945
1971	516
1972	427
1973	755
1974	852
1975	1,032
1976	519
1977	1,021
1978	1,362
1979	722
1980	640
1981	1,060
1982	926
1983	564
1984	532
1985	1,471
1986	1,507
1987	2,256
1988	850
1989	1,335
1990	842
1991	634
1992	747
1993	668
1994	871
1995	940
1996	743
1997	962
1998	2,587
1999	1,100
2000	581
2001	686
2002	861
2003	1,722
2004	1,055
2005	861
2006	1,088
2007	1,150
2008	1,471
2009	927
2010	984
2011	1,020
2012	942
2013	753
2014	631
2015	861
2016	823
2017	1,423
2018	663
2019	544
2020	534
2021	949
2022	683
2023	1,128
2024	488
2025	942
2026	1,275

Download the Data

Data for records on 1918-03-31: 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 5	26
5 to 10	2
10 to 15	0
15 to 20	1
20 to 25	0
25 to 30	1