Weather Records on 20 April 1997

833 weather records were set or tied worldwide on 20 April 1997. Highest significance: Avoca, ZA.

Key Facts for 20 April 1997

On 20 April 1997, 833 weather records were set or tied at long-record stations worldwide.
236 were record highs and 257 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 20 monthly and 812 daily.
Avoca set a daily record precipitation of 64.0 mm (2.5 in) on 20 April 1997.
Across 159 earlier years (1807 to 2026) the same calendar date averaged 460 records.

Record Map

833 stations

833 station records on 20 April 1997 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 April 1997: highest significance records shown on the map
Station	Country	Type	Value	Significance
Avoca	South Africa	Record daily precipitation	64.0 mm (2.5 in)	72 of 100 (Major)
Santa Cruz Zenzontepec (Cfe)	Mexico	Record daily precipitation	103.9 mm (4.1 in)	59 of 100 (Notable)
Camelpo	Mexico	Record daily precipitation	117.1 mm (4.6 in)	55 of 100 (Notable)
San Miguel Chimalapa	Mexico	Record daily precipitation	59.9 mm (2.4 in)	52 of 100 (Notable)
Fidelandia	Brazil	Record daily precipitation	64.5 mm (2.5 in)	51 of 100 (Notable)
Krakmo	Norway	Record snow depth	152.0 cm (59.8 in)	49 of 100 (Notable)
Marion Forks Fish Hatchery	United States	Record daily precipitation	58.9 mm (2.3 in)	49 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record high maximum temperature	33.9 C (93.0 F)	46 of 100 (Notable)
Corvallis State UNIV	United States	Record daily precipitation	27.4 mm (1.1 in)	46 of 100 (Notable)
Williams 1 NW	United States	Record daily precipitation	29.0 mm (1.1 in)	46 of 100 (Notable)
Sonnblick	Austria	Record daily precipitation	38.4 mm (1.5 in)	45 of 100 (Notable)
Mucuri	Brazil	Record daily precipitation	43.3 mm (1.7 in)	45 of 100 (Notable)
Keshan	China	Record daily precipitation	29.3 mm (1.2 in)	45 of 100 (Notable)
Snoqualmie Falls	United States	Record daily precipitation	47.5 mm (1.9 in)	45 of 100 (Notable)
Ankenes	Norway	Record snow depth	134.0 cm (52.8 in)	44 of 100 (Notable)
Adin Rs	United States	Record high minimum temperature	8.3 C (46.9 F)	44 of 100 (Notable)
Los Gatos	United States	Record high minimum temperature	15.6 C (60.1 F)	43 of 100 (Notable)
Santa Cruz	United States	Record high minimum temperature	12.8 C (55.0 F)	43 of 100 (Notable)
Sandpoint Exp STN	United States	Record daily precipitation	45.7 mm (1.8 in)	43 of 100 (Notable)
Despoblado	Mexico	Record daily precipitation	97.8 mm (3.9 in)	42 of 100 (Notable)
Sisal	Mexico	Record daily precipitation	35.8 mm (1.4 in)	41 of 100 (Notable)
New Meadows Rs	United States	Record high minimum temperature	8.3 C (46.9 F)	41 of 100 (Notable)
Corvallis Water Bureau	United States	Record daily precipitation	49.5 mm (1.9 in)	41 of 100 (Notable)
Putbus	Germany	Record low minimum temperature	-2.4 C (27.7 F)	40 of 100 (Notable)
Mahackala	Russia	Record low minimum temperature	-0.9 C (30.4 F)	40 of 100 (Notable)
Tromso	Norway	Record snow depth	223.0 cm (87.8 in)	39 of 100 (Notable)
Etwa (Bos)	South Africa	Record daily precipitation	34.1 mm (1.3 in)	39 of 100 (Notable)
Livermore	United States	Record high minimum temperature	14.4 C (57.9 F)	39 of 100 (Notable)
Belknap Springs 8 N	United States	Record daily precipitation	53.1 mm (2.1 in)	39 of 100 (Notable)
Naselle 2 ENE	United States	Record daily precipitation	81.5 mm (3.2 in)	39 of 100 (Notable)
Tasiilaq	Greenland [Denmark]	Record high maximum temperature	10.3 C (50.5 F)	38 of 100 (Notable)
Greifswald	Germany	Record low minimum temperature	-2.9 C (26.8 F)	38 of 100 (Notable)
Blaine	United States	Record daily precipitation	38.1 mm (1.5 in)	38 of 100 (Notable)
Velikie Luki	Russia	Record low maximum temperature	0.5 C (32.9 F)	37 of 100 (Notable)
Haparanda	Sweden	Record snow depth	76.0 cm (29.9 in)	37 of 100 (Notable)
Mineral	United States	Record high minimum temperature	6.7 C (44.1 F)	37 of 100 (Notable)
Pendleton Dwtn	United States	Record high minimum temperature	11.7 C (53.1 F)	37 of 100 (Notable)
Grayland	United States	Record daily precipitation	42.4 mm (1.7 in)	37 of 100 (Notable)
Alger-Dar El Beida	Algeria	Record daily precipitation	52.9 mm (2.1 in)	36 of 100 (Notable)
Porto Lucena	Brazil	Record daily precipitation	82.5 mm (3.2 in)	36 of 100 (Notable)
Orleans	United States	Record daily precipitation	26.2 mm (1.0 in)	36 of 100 (Notable)
Fundao	Brazil	Record daily precipitation	50.0 mm (2.0 in)	35 of 100 (Notable)
Pohnpei WSO	Federated States of Micronesia	Record daily precipitation	267.5 mm (10.5 in)	35 of 100 (Notable)
Canyon Dam	United States	Record high minimum temperature	7.2 C (45.0 F)	35 of 100 (Notable)
Ruxton Park	United States	Record daily snowfall	61.0 cm (24.0 in)	35 of 100 (Notable)
Detroit Dam	United States	Record daily precipitation	53.8 mm (2.1 in)	35 of 100 (Notable)
Iconha-Montante	Brazil	Record daily precipitation	50.0 mm (2.0 in)	34 of 100 (Routine)
Hiddensee-Vitte	Germany	Record low minimum temperature	-2.2 C (28.0 F)	34 of 100 (Routine)
Grootkuil	South Africa	Record daily precipitation	33.5 mm (1.3 in)	34 of 100 (Routine)
Inverness 3 SE	United States	Record low minimum temperature	5.6 C (42.1 F)	34 of 100 (Routine)
Quilcene 2 SW	United States	Record daily precipitation	36.8 mm (1.4 in)	34 of 100 (Routine)
Talmoi	Australia	Record daily precipitation	34.4 mm (1.4 in)	33 of 100 (Routine)
Nouasseur	Morocco	Record daily precipitation	26.9 mm (1.1 in)	33 of 100 (Routine)
Buenavista	Mexico	Record low maximum temperature	30.0 C (86.0 F)	33 of 100 (Routine)
Storsteinnes I Balsfjord	Norway	Record snow depth	183.0 cm (72.0 in)	33 of 100 (Routine)
Bajramaly	Turkmenistan	Record daily precipitation	27.1 mm (1.1 in)	33 of 100 (Routine)
Norris	United States	Record low maximum temperature	11.7 C (53.1 F)	33 of 100 (Routine)
Leavenworth 3 S	United States	Record daily precipitation	26.4 mm (1.0 in)	33 of 100 (Routine)
Rietpan	South Africa	Record daily precipitation	25.3 mm (1.0 in)	32 of 100 (Routine)
Mtn City Rs	United States	Record high minimum temperature	12.8 C (55.0 F)	32 of 100 (Routine)

Counts by Type and Timescale

833 records

Records set or tied on 20 April 1997 by type: Highest daily maximum 61, Lowest daily maximum 102, Highest daily minimum 175, Lowest daily minimum 155, Heaviest daily rainfall 293, Heaviest daily snowfall 1, Deepest snow cover 46.

Records on 20 April 1997 by type
Record type	Records
Highest daily maximum	61
Lowest daily maximum	102
Highest daily minimum	175
Lowest daily minimum	155
Heaviest daily rainfall	293
Heaviest daily snowfall	1
Deepest snow cover	46

Records on 20 April 1997 by timescale: all-time 1, monthly 20, daily 812.

How Much Records Were Beaten By

669 broken records

Margins by which the 669 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 730.0. Ties are not counted.

Top 20 by Significance

20 April 1997

Top 20 records on 20 April 1997 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 April 1997	Avoca, ZA	daily rain	64.0 mm (2.5 in)	44.4 mm (1.7 in)	74 years	72 of 100 (Major)
20 April 1997	Santa Cruz Zenzontepec (Cfe), MX	monthly rain	103.9 mm (4.1 in)	52.1 mm (2.1 in)	31 years	59 of 100 (Notable)
20 April 1997	Camelpo, MX	monthly rain	117.1 mm (4.6 in)	47.2 mm (1.9 in)	7 years	55 of 100 (Notable)
20 April 1997	San Miguel Chimalapa, MX	daily rain	59.9 mm (2.4 in)	57.1 mm (2.2 in)	32 years	52 of 100 (Notable)
20 April 1997	Fidelandia, BR	daily rain	64.5 mm (2.5 in)	57.8 mm (2.3 in)	32 years	51 of 100 (Notable)
20 April 1997	Krakmo, NO	daily snow depth	152.0 cm (59.8 in)	29.0 cm (11.4 in)	92 years	49 of 100 (Notable)
20 April 1997	Marion Forks Fish Hatchery, US	daily rain	58.9 mm (2.3 in)	29.9 mm (1.2 in)	39 years	49 of 100 (Notable)
20 April 1997	Isabela Substn, PR	daily high max	33.9 C (93.0 F)	1.7 C (3.1 F)	87 years	46 of 100 (Notable)
20 April 1997	Corvallis State UNIV, US	daily rain	27.4 mm (1.1 in)	6.6 mm (0.26 in)	80 years	46 of 100 (Notable)
20 April 1997	Williams 1 NW, US	daily rain	29.0 mm (1.1 in)	20.9 mm (0.8 in)	2 years	46 of 100 (Notable)
20 April 1997	Sonnblick, AT	daily rain	38.4 mm (1.5 in)	9.1 mm (0.36 in)	80 years	45 of 100 (Notable)
20 April 1997	Mucuri, BR	daily rain	43.3 mm (1.7 in)	30.1 mm (1.2 in)	27 years	45 of 100 (Notable)
20 April 1997	Keshan, CN	daily rain	29.3 mm (1.2 in)	13.5 mm (0.5 in)	28 years	45 of 100 (Notable)
20 April 1997	Snoqualmie Falls, US	daily rain	47.5 mm (1.9 in)	18.5 mm (0.7 in)	36 years	45 of 100 (Notable)
20 April 1997	Ankenes, NO	daily snow depth	134.0 cm (52.8 in)	25.0 cm (9.8 in)	86 years	44 of 100 (Notable)
20 April 1997	Adin Rs, US	daily high min	8.3 C (46.9 F)	1.6 C (2.9 F)	102 years	44 of 100 (Notable)
20 April 1997	Los Gatos, US	daily high min	15.6 C (60.1 F)	1.7 C (3.1 F)	91 years	43 of 100 (Notable)
20 April 1997	Santa Cruz, US	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	90 years	43 of 100 (Notable)
20 April 1997	Sandpoint Exp STN, US	monthly rain	45.7 mm (1.8 in)	7.3 mm (0.29 in)	43 years	43 of 100 (Notable)
20 April 1997	Despoblado, MX	monthly rain	97.8 mm (3.9 in)	30.5 mm (1.2 in)	14 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

1807 to 1997

Records set or tied on this calendar date in each year from 1807 to 1997. 1997 had 833 records.

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

Records on 04-20 in each year
Year	Records
1807	3
1817	1
1838	1
1849	2
1851	1
1852	4
1854	1
1858	1
1860	1
1864	1
1865	3
1868	1
1869	1
1870	1
1872	1
1874	3
1875	4
1876	1
1878	2
1880	2
1881	2
1884	1
1885	1
1886	2
1889	1
1891	2
1892	1
1893	6
1894	8
1895	7
1896	3
1897	6
1898	1
1899	1
1901	8
1902	3
1903	14
1904	31
1905	9
1906	12
1907	18
1908	14
1909	22
1910	25
1911	18
1912	12
1913	19
1914	46
1915	45
1916	19
1917	33
1918	42
1919	17
1920	49
1921	27
1922	40
1923	157
1924	113
1925	169
1926	310
1927	442
1928	212
1929	182
1930	87
1931	255
1932	166
1933	279
1934	384
1935	384
1936	311
1937	427
1938	339
1939	158
1940	519
1941	558
1942	223
1943	670
1944	304
1945	391
1946	395
1947	308
1948	493
1949	477
1950	329
1951	690
1952	552
1953	1,071
1954	377
1955	623
1956	384
1957	730
1958	327
1959	563
1960	472
1961	1,078
1962	487
1963	595
1964	749
1965	724
1966	1,174
1967	864
1968	975
1969	382
1970	948
1971	765
1972	531
1973	982
1974	673
1975	344
1976	661
1977	693
1978	800
1979	495
1980	1,539
1981	706
1982	906
1983	1,844
1984	922
1985	1,140
1986	770
1987	1,447
1988	1,144
1989	1,187
1990	1,495
1991	1,075
1992	1,009
1993	772
1994	756
1995	1,351
1996	970
1997	833
1998	1,490
1999	674
2000	931
2001	752
2002	1,081
2003	758
2004	567
2005	707
2006	859
2007	582
2008	1,110
2009	845
2010	693
2011	1,477
2012	726
2013	1,520
2014	384
2015	702
2016	650
2017	734
2018	1,309
2019	1,019
2020	449
2021	1,215
2022	596
2023	828
2024	673
2025	836
2026	533

Download the Data

Data for records on 1997-04-20: 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 100	652
100 to 200	5
200 to 300	4
300 to 400	4
400 to 500	2
500 to 600	0
600 to 700	1
700 to 800	1