Weather Records on 18 March 1991

706 weather records were set or tied worldwide on 18 March 1991. Highest significance: Jhb-Norwood, ZA.

Key Facts for 18 March 1991

On 18 March 1991, 706 weather records were set or tied at long-record stations worldwide.
269 were record highs and 110 were record lows, counting maximum and minimum temperature.
By timescale, 4 were all-time records, 30 monthly and 672 daily.
Jhb-Norwood set a daily record precipitation of 80.5 mm (3.2 in) on 18 March 1991.
Across 160 earlier years (1806 to 2026) the same calendar date averaged 476 records.

Record Map

706 stations

706 station records on 18 March 1991 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 18 March 1991: highest significance records shown on the map
Station	Country	Type	Value	Significance
Jhb-Norwood	South Africa	Record daily precipitation	80.5 mm (3.2 in)	65 of 100 (Major)
Santa Barbara	United States	Record daily precipitation	91.4 mm (3.6 in)	65 of 100 (Major)
Dullstroom (Sar)	South Africa	Record daily precipitation	56.0 mm (2.2 in)	54 of 100 (Notable)
Sandberg	United States	Record daily precipitation	64.8 mm (2.6 in)	53 of 100 (Notable)
Paso Robles	United States	Record daily precipitation	27.7 mm (1.1 in)	52 of 100 (Notable)
Ellery Lake	United States	Record daily precipitation	38.4 mm (1.5 in)	51 of 100 (Notable)
Lake Sabrina	United States	Record daily precipitation	29.7 mm (1.2 in)	50 of 100 (Notable)
Los Alamos	United States	Record daily precipitation	47.2 mm (1.9 in)	50 of 100 (Notable)
Seward AP	United States	Record daily snowfall	39.4 cm (15.5 in)	49 of 100 (Notable)
Bridgeport	United States	Record daily snowfall	15.2 cm (6.0 in)	48 of 100 (Notable)
Bishop Creek Intake 2	United States	Record daily precipitation	44.5 mm (1.8 in)	46 of 100 (Notable)
Kettleman STN	United States	Record daily precipitation	36.8 mm (1.4 in)	46 of 100 (Notable)
Ojai	United States	Record daily precipitation	57.2 mm (2.3 in)	46 of 100 (Notable)
Juncal Dam	United States	Record daily precipitation	129.5 mm (5.1 in)	45 of 100 (Notable)
Oxnard	United States	Record daily precipitation	53.3 mm (2.1 in)	45 of 100 (Notable)
So Entrance Yosemite Np	United States	Record daily precipitation	92.7 mm (3.6 in)	43 of 100 (Notable)
Ventura	United States	Record daily precipitation	54.4 mm (2.1 in)	43 of 100 (Notable)
Steinhatchee 6 ENE	United States	Record daily precipitation	114.3 mm (4.5 in)	43 of 100 (Notable)
Trekpad	South Africa	Record daily precipitation	66.0 mm (2.6 in)	42 of 100 (Notable)
Hanford 1 S	United States	Record daily precipitation	26.2 mm (1.0 in)	42 of 100 (Notable)
Cross City 1 E	United States	Record daily precipitation	85.9 mm (3.4 in)	42 of 100 (Notable)
Snake Rvr	United States	Record daily snowfall	35.6 cm (14.0 in)	42 of 100 (Notable)
Gulargambone (Yalcogrin St)	Australia	Record daily precipitation	29.0 mm (1.1 in)	41 of 100 (Notable)
Lebec	United States	Record daily precipitation	93.5 mm (3.7 in)	41 of 100 (Notable)
Clermont 9 S	United States	Record daily precipitation	79.2 mm (3.1 in)	41 of 100 (Notable)
Paso Robles Muni AP	United States	Record daily precipitation	51.3 mm (2.0 in)	41 of 100 (Notable)
Porto	Brazil	Record daily precipitation	83.3 mm (3.3 in)	40 of 100 (Notable)
Mayaguez City	Puerto Rico [United States]	Record high minimum temperature	23.3 C (73.9 F)	40 of 100 (Notable)
Santa Barbara Muni AP	United States	Record daily precipitation	113.5 mm (4.5 in)	40 of 100 (Notable)
Cachuma Lake	United States	Record daily precipitation	91.4 mm (3.6 in)	39 of 100 (Notable)
Pismo Beach	United States	Record daily precipitation	40.4 mm (1.6 in)	39 of 100 (Notable)
Pt Mugu Nf	United States	Record daily precipitation	73.9 mm (2.9 in)	39 of 100 (Notable)
Santa Paula	United States	Record low maximum temperature	12.2 C (54.0 F)	38 of 100 (Notable)
Daytona Beach Intl AP	United States	Record daily precipitation	54.4 mm (2.1 in)	38 of 100 (Notable)
Lompoc	United States	Record daily precipitation	44.7 mm (1.8 in)	37 of 100 (Notable)
Santa Barbara	United States	Record low minimum temperature	0.6 C (33.1 F)	37 of 100 (Notable)
Tejon Rancho	United States	Record low minimum temperature	1.1 C (34.0 F)	37 of 100 (Notable)
Lemoore Reeves NAS	United States	Record daily precipitation	30.7 mm (1.2 in)	37 of 100 (Notable)
Bishop AP	United States	Record low maximum temperature	7.2 C (45.0 F)	37 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record low minimum temperature	18.3 C (64.9 F)	36 of 100 (Notable)
Tejon Rancho	United States	Record daily precipitation	39.4 mm (1.6 in)	36 of 100 (Notable)
Sharon	United States	Record daily snowfall	12.7 cm (5.0 in)	36 of 100 (Notable)
Santa Maria Public AP	United States	Record daily precipitation	79.8 mm (3.1 in)	36 of 100 (Notable)
Niamey Aero	Niger	Record daily precipitation	51.1 mm (2.0 in)	35 of 100 (Notable)
Cherry Valley Dam	United States	Record daily snowfall	41.4 cm (16.3 in)	35 of 100 (Notable)
Lindsay	United States	Record daily precipitation	31.0 mm (1.2 in)	35 of 100 (Notable)
N Fk Rs	United States	Record low minimum temperature	-6.1 C (21.0 F)	34 of 100 (Routine)
Paisley	United Kingdom	Record daily precipitation	41.3 mm (1.6 in)	33 of 100 (Routine)
Friant Government Camp	United States	Record daily precipitation	41.1 mm (1.6 in)	33 of 100 (Routine)
Madera	United States	Record daily precipitation	30.0 mm (1.2 in)	33 of 100 (Routine)
Palco	United States	Record daily precipitation	27.9 mm (1.1 in)	33 of 100 (Routine)
Eskdalemuir	United Kingdom	Record daily precipitation	61.5 mm (2.4 in)	32 of 100 (Routine)
Morro Bay Fire Dept	United States	Record daily precipitation	59.7 mm (2.4 in)	32 of 100 (Routine)
Yosemite Park HQ	United States	Record low maximum temperature	1.1 C (34.0 F)	32 of 100 (Routine)
Lake City 2 E	United States	Record daily precipitation	67.8 mm (2.7 in)	32 of 100 (Routine)
Piranhas	Brazil	Record daily precipitation	38.0 mm (1.5 in)	31 of 100 (Routine)
Marysville	United States	Record low maximum temperature	11.7 C (53.1 F)	31 of 100 (Routine)
Glen St Mary 1 W	United States	Record daily precipitation	63.5 mm (2.5 in)	31 of 100 (Routine)
Terre Haute Indiana State	United States	Record daily precipitation	26.7 mm (1.1 in)	31 of 100 (Routine)
Auberry 2 NW	United States	Record daily precipitation	51.6 mm (2.0 in)	30 of 100 (Routine)

Counts by Type and Timescale

706 records

Records set or tied on 18 March 1991 by type: Highest daily maximum 171, Lowest daily maximum 68, Highest daily minimum 98, Lowest daily minimum 42, Heaviest daily rainfall 310, Heaviest daily snowfall 12, Deepest snow cover 5.

Records on 18 March 1991 by type
Record type	Records
Highest daily maximum	171
Lowest daily maximum	68
Highest daily minimum	98
Lowest daily minimum	42
Heaviest daily rainfall	310
Heaviest daily snowfall	12
Deepest snow cover	5

Records on 18 March 1991 by timescale: all-time 4, monthly 30, daily 672.

How Much Records Were Beaten By

560 broken records

Margins by which the 560 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 338.0. Ties are not counted.

Top 20 by Significance

18 March 1991

Top 20 records on 18 March 1991 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 March 1991	Jhb-Norwood, ZA	daily rain	80.5 mm (3.2 in)	52.6 mm (2.1 in)	62 years	65 of 100 (Major)
18 March 1991	Santa Barbara, US	daily rain	91.4 mm (3.6 in)	56.3 mm (2.2 in)	72 years	65 of 100 (Major)
18 March 1991	Dullstroom (Sar), ZA	daily rain	56.0 mm (2.2 in)	30.1 mm (1.2 in)	68 years	54 of 100 (Notable)
18 March 1991	Sandberg, US	daily rain	64.8 mm (2.6 in)	58.7 mm (2.3 in)	28 years	53 of 100 (Notable)
18 March 1991	Paso Robles, US	daily rain	27.7 mm (1.1 in)	19.6 mm (0.8 in)	77 years	52 of 100 (Notable)
18 March 1991	Ellery Lake, US	daily rain	38.4 mm (1.5 in)	21.9 mm (0.9 in)	60 years	51 of 100 (Notable)
18 March 1991	Lake Sabrina, US	daily rain	29.7 mm (1.2 in)	21.8 mm (0.9 in)	53 years	50 of 100 (Notable)
18 March 1991	Los Alamos, US	daily rain	47.2 mm (1.9 in)	26.6 mm (1.0 in)	72 years	50 of 100 (Notable)
18 March 1991	Seward AP, US	daily snowfall	39.4 cm (15.5 in)	23.7 cm (9.3 in)	5 years	49 of 100 (Notable)
18 March 1991	Bridgeport, US	daily snowfall	15.2 cm (6.0 in)	11.6 cm (4.6 in)	77 years	48 of 100 (Notable)
18 March 1991	Bishop Creek Intake 2, US	daily rain	44.5 mm (1.8 in)	32.8 mm (1.3 in)	10 years	46 of 100 (Notable)
18 March 1991	Kettleman STN, US	daily rain	36.8 mm (1.4 in)	33.8 mm (1.3 in)	5 years	46 of 100 (Notable)
18 March 1991	Ojai, US	daily rain	57.2 mm (2.3 in)	40.7 mm (1.6 in)	60 years	46 of 100 (Notable)
18 March 1991	Juncal Dam, US	daily rain	129.5 mm (5.1 in)	97.2 mm (3.8 in)	8 years	45 of 100 (Notable)
18 March 1991	Oxnard, US	daily rain	53.3 mm (2.1 in)	38.3 mm (1.5 in)	44 years	45 of 100 (Notable)
18 March 1991	So Entrance Yosemite Np, US	daily rain	92.7 mm (3.6 in)	68.6 mm (2.7 in)	8 years	43 of 100 (Notable)
18 March 1991	Ventura, US	daily rain	54.4 mm (2.1 in)	36.6 mm (1.4 in)	44 years	43 of 100 (Notable)
18 March 1991	Steinhatchee 6 ENE, US	daily rain	114.3 mm (4.5 in)	93.7 mm (3.7 in)	0 years	43 of 100 (Notable)
18 March 1991	Trekpad, ZA	daily rain	66.0 mm (2.6 in)	36.0 mm (1.4 in)	29 years	42 of 100 (Notable)
18 March 1991	Hanford 1 S, US	daily rain	26.2 mm (1.0 in)	7.4 mm (0.29 in)	72 years	42 of 100 (Notable)

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

1806 to 1991

Records set or tied on this calendar date in each year from 1806 to 1991. 1991 had 706 records.

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

Records on 03-18 in each year
Year	Records
1806	1
1807	1
1808	1
1810	1
1814	1
1831	1
1836	1
1839	1
1845	1
1849	1
1850	5
1853	2
1859	1
1863	1
1865	2
1867	1
1868	3
1876	1
1881	1
1882	3
1884	3
1885	1
1887	1
1888	4
1890	3
1891	3
1892	2
1893	1
1894	1
1895	2
1896	10
1897	14
1898	5
1899	8
1900	14
1901	2
1902	9
1903	22
1904	9
1905	19
1906	13
1907	11
1908	8
1909	9
1910	12
1911	17
1912	16
1913	24
1914	32
1915	30
1916	73
1917	45
1918	32
1919	25
1920	39
1921	66
1922	39
1923	262
1924	96
1925	145
1926	251
1927	376
1928	301
1929	106
1930	261
1931	167
1932	212
1933	244
1934	375
1935	87
1936	699
1937	296
1938	304
1939	750
1940	444
1941	954
1942	382
1943	603
1944	321
1945	751
1946	492
1947	328
1948	296
1949	292
1950	1,042
1951	582
1952	474
1953	218
1954	355
1955	469
1956	363
1957	374
1958	347
1959	392
1960	585
1961	579
1962	284
1963	665
1964	348
1965	1,584
1966	540
1967	1,396
1968	915
1969	601
1970	533
1971	405
1972	1,028
1973	716
1974	694
1975	614
1976	538
1977	684
1978	1,003
1979	894
1980	588
1981	570
1982	1,284
1983	1,225
1984	446
1985	731
1986	626
1987	933
1988	1,001
1989	1,147
1990	1,478
1991	706
1992	789
1993	1,683
1994	960
1995	833
1996	518
1997	1,024
1998	1,144
1999	1,051
2000	524
2001	841
2002	1,562
2003	1,425
2004	1,232
2005	1,178
2006	551
2007	1,330
2008	1,066
2009	776
2010	678
2011	993
2012	3,348
2013	783
2014	701
2015	943
2016	675
2017	1,183
2018	921
2019	666
2020	672
2021	562
2022	476
2023	890
2024	843
2025	728
2026	2,870

Download the Data

Data for records on 1991-03-18: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 50	541
50 to 100	13
100 to 150	3
150 to 200	1
200 to 250	1
250 to 300	0
300 to 350	1