Weather Records on 20 August 2003

1,031 weather records were set or tied worldwide on 20 August 2003. Highest significance: Alvsbyn_A, SE.

Key Facts for 20 August 2003

On 20 August 2003, 1,031 weather records were set or tied at long-record stations worldwide.
619 were record highs and 171 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 15 monthly and 1,015 daily.
Alvsbyn_A set a daily record precipitation of 47.2 mm (1.9 in) on 20 August 2003.
Across 163 earlier years (1797 to 2026) the same calendar date averaged 451 records.

Record Map

1,031 stations

1,031 station records on 20 August 2003 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 20 August 2003: highest significance records shown on the map
Station	Country	Type	Value	Significance
Alvsbyn_A	Sweden	Record daily precipitation	47.2 mm (1.9 in)	56 of 100 (Notable)
San Cristobal	Mexico	Record daily precipitation	48.8 mm (1.9 in)	53 of 100 (Notable)
Eide Pa Nordmore	Norway	Record daily precipitation	86.2 mm (3.4 in)	48 of 100 (Notable)
Hustadvatn	Norway	Record daily precipitation	68.0 mm (2.7 in)	48 of 100 (Notable)
Deep Springs College	United States	Record daily precipitation	35.1 mm (1.4 in)	47 of 100 (Notable)
Metztitlan	Mexico	Record daily precipitation	79.8 mm (3.1 in)	46 of 100 (Notable)
Mjolkbacken	Sweden	Record daily precipitation	36.0 mm (1.4 in)	45 of 100 (Notable)
Inverness 3 SE	United States	Record daily precipitation	63.5 mm (2.5 in)	45 of 100 (Notable)
Nelson Bay (Nelson Head)	Australia	Record daily precipitation	79.6 mm (3.1 in)	44 of 100 (Notable)
Famvatnet	Norway	Record daily precipitation	25.0 mm (1.0 in)	44 of 100 (Notable)
Ft Grant	United States	Record high maximum temperature	36.7 C (98.1 F)	44 of 100 (Notable)
Lakeview 2 NNW	United States	Record high maximum temperature	38.9 C (102.0 F)	44 of 100 (Notable)
Ft Collins	United States	Record high maximum temperature	35.0 C (95.0 F)	43 of 100 (Notable)
Collegeville St John's	United States	Record high minimum temperature	22.8 C (73.0 F)	43 of 100 (Notable)
Ixtayutla	Mexico	Record daily precipitation	80.8 mm (3.2 in)	42 of 100 (Notable)
Red Oak	United States	Record high maximum temperature	38.3 C (100.9 F)	42 of 100 (Notable)
Hvar	Croatia	Record high minimum temperature	26.3 C (79.3 F)	41 of 100 (Notable)
Tustervatnet II	Norway	Record daily precipitation	37.0 mm (1.5 in)	41 of 100 (Notable)
Arkadelphia 2 N	United States	Record high minimum temperature	23.9 C (75.0 F)	41 of 100 (Notable)
Salida	United States	Record high maximum temperature	33.3 C (91.9 F)	41 of 100 (Notable)
Manhattan	United States	Record high maximum temperature	40.6 C (105.1 F)	41 of 100 (Notable)
Sandy Lake Dam Libby	United States	Record high minimum temperature	22.8 C (73.0 F)	41 of 100 (Notable)
Winona	United States	Record high minimum temperature	24.4 C (75.9 F)	41 of 100 (Notable)
Maryville 2E	United States	Record high maximum temperature	38.3 C (100.9 F)	41 of 100 (Notable)
Paradise Valley 1 NW	United States	Record high maximum temperature	37.8 C (100.0 F)	41 of 100 (Notable)
Yellowstone Park Mammoth	United States	Record high minimum temperature	12.2 C (54.0 F)	41 of 100 (Notable)
Turgaj	Kazakhstan	Record high minimum temperature	21.7 C (71.1 F)	40 of 100 (Notable)
Rosamorada	Mexico	Record daily precipitation	142.0 mm (5.6 in)	40 of 100 (Notable)
Little Falls 2NNE	United States	Record high minimum temperature	22.2 C (72.0 F)	40 of 100 (Notable)
Superior	United States	Record high maximum temperature	37.8 C (100.0 F)	40 of 100 (Notable)
Aneth Plt	United States	Record high maximum temperature	37.8 C (100.0 F)	40 of 100 (Notable)
Donaueschingen	Germany	Record daily precipitation	44.8 mm (1.8 in)	39 of 100 (Notable)
Escalante	United States	Record high minimum temperature	18.3 C (64.9 F)	39 of 100 (Notable)
Ewa Plantation 741	United States	Record high minimum temperature	24.4 C (75.9 F)	39 of 100 (Notable)
Kilauea 1134	United States	Record high minimum temperature	23.9 C (75.0 F)	39 of 100 (Notable)
Luumaki Saareks	Finland	Record daily precipitation	29.5 mm (1.2 in)	38 of 100 (Notable)
La Begoa	Mexico	Record daily precipitation	37.3 mm (1.5 in)	38 of 100 (Notable)
Roi Et	Thailand	Record daily precipitation	58.7 mm (2.3 in)	38 of 100 (Notable)
Sunset Crater Nm	United States	Record daily precipitation	45.7 mm (1.8 in)	38 of 100 (Notable)
Horton	United States	Record high maximum temperature	38.3 C (100.9 F)	38 of 100 (Notable)
Wamego 4 W	United States	Record high maximum temperature	40.0 C (104.0 F)	38 of 100 (Notable)
Abbeville	United States	Record daily precipitation	58.7 mm (2.3 in)	38 of 100 (Notable)
Big Springs	United States	Record high maximum temperature	38.9 C (102.0 F)	38 of 100 (Notable)
Celaya (Smn)	Mexico	Record daily precipitation	60.5 mm (2.4 in)	37 of 100 (Notable)
Abilene	United States	Record high maximum temperature	41.7 C (107.1 F)	37 of 100 (Notable)
Eldorado Springs	United States	Record high minimum temperature	24.4 C (75.9 F)	37 of 100 (Notable)
Qian Gorlos	China	Record daily precipitation	67.0 mm (2.6 in)	36 of 100 (Notable)
Hemling	Sweden	Record daily precipitation	48.8 mm (1.9 in)	36 of 100 (Notable)
Mondovi	United States	Record high maximum temperature	35.6 C (96.1 F)	36 of 100 (Notable)
Bulahdelah Post Office	Australia	Record daily precipitation	34.0 mm (1.3 in)	35 of 100 (Notable)
Ameca	Mexico	Record low maximum temperature	25.6 C (78.1 F)	35 of 100 (Notable)
Zlatoust	Russia	Record daily precipitation	46.2 mm (1.8 in)	35 of 100 (Notable)
Big Bear Lake	United States	Record daily precipitation	66.0 mm (2.6 in)	35 of 100 (Notable)
Miami Intl AP	United States	Record low maximum temperature	26.1 C (79.0 F)	35 of 100 (Notable)
Jervis Bay (Point Perpendicula	Australia	Record low minimum temperature	0.5 C (32.9 F)	34 of 100 (Routine)
Despoblado	Mexico	Record high maximum temperature	40.0 C (104.0 F)	34 of 100 (Routine)
Neutla	Mexico	Record daily precipitation	77.0 mm (3.0 in)	34 of 100 (Routine)
Drobeta Turnu Severin	Romania	Record high minimum temperature	25.2 C (77.4 F)	34 of 100 (Routine)
Sandpoint Exp STN	United States	Record high maximum temperature	34.4 C (93.9 F)	34 of 100 (Routine)
Clover Valley	United States	Record high minimum temperature	17.8 C (64.0 F)	34 of 100 (Routine)

Counts by Type and Timescale

1,031 records

Records set or tied on 20 August 2003 by type: Highest daily maximum 247, Lowest daily maximum 83, Highest daily minimum 372, Lowest daily minimum 88, Heaviest daily rainfall 241.

Records on 20 August 2003 by type
Record type	Records
Highest daily maximum	247
Lowest daily maximum	83
Highest daily minimum	372
Lowest daily minimum	88
Heaviest daily rainfall	241
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 20 August 2003 by timescale: all-time 1, monthly 15, daily 1,015.

How Much Records Were Beaten By

705 broken records

Margins by which the 705 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 71.6. Ties are not counted.

Top 20 by Significance

20 August 2003

Top 20 records on 20 August 2003 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 August 2003	Alvsbyn_A, SE	daily rain	47.2 mm (1.9 in)	24.7 mm (1.0 in)	54 years	56 of 100 (Notable)
20 August 2003	San Cristobal, MX	daily rain	48.8 mm (1.9 in)	32.0 mm (1.3 in)	41 years	53 of 100 (Notable)
20 August 2003	Eide Pa Nordmore, NO	daily rain	86.2 mm (3.4 in)	56.8 mm (2.2 in)	14 years	48 of 100 (Notable)
20 August 2003	Hustadvatn, NO	daily rain	68.0 mm (2.7 in)	38.1 mm (1.5 in)	14 years	48 of 100 (Notable)
20 August 2003	Deep Springs College, US	daily rain	35.1 mm (1.4 in)	31.0 mm (1.2 in)	16 years	47 of 100 (Notable)
20 August 2003	Metztitlan, MX	daily rain	79.8 mm (3.1 in)	57.4 mm (2.3 in)	4 years	46 of 100 (Notable)
20 August 2003	Mjolkbacken, SE	daily rain	36.0 mm (1.4 in)	24.7 mm (1.0 in)	6 years	45 of 100 (Notable)
20 August 2003	Inverness 3 SE, US	daily rain	63.5 mm (2.5 in)	14.0 mm (0.6 in)	92 years	45 of 100 (Notable)
20 August 2003	Nelson Bay (Nelson Head), AU	daily rain	79.6 mm (3.1 in)	46.2 mm (1.8 in)	6 years	44 of 100 (Notable)
20 August 2003	Famvatnet, NO	daily rain	25.0 mm (1.0 in)	17.5 mm (0.7 in)	20 years	44 of 100 (Notable)
20 August 2003	Ft Grant, US	daily high max	36.7 C (98.1 F)	1.1 C (2.0 F)	100 years	44 of 100 (Notable)
20 August 2003	Lakeview 2 NNW, US	daily high max	38.9 C (102.0 F)	3.9 C (7.0 F)	84 years	44 of 100 (Notable)
20 August 2003	Ft Collins, US	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	104 years	43 of 100 (Notable)
20 August 2003	Collegeville St John's, US	daily high min	22.8 C (73.0 F)	1.1 C (2.0 F)	102 years	43 of 100 (Notable)
20 August 2003	Ixtayutla, MX	daily rain	80.8 mm (3.2 in)	44.0 mm (1.7 in)	33 years	42 of 100 (Notable)
20 August 2003	Red Oak, US	daily high max	38.3 C (100.9 F)	1.1 C (2.0 F)	104 years	42 of 100 (Notable)
20 August 2003	Hvar, HR	daily high min	26.3 C (79.3 F)	0.3 C (0.5 F)	125 years	41 of 100 (Notable)
20 August 2003	Tustervatnet II, NO	daily rain	37.0 mm (1.5 in)	14.0 mm (0.6 in)	42 years	41 of 100 (Notable)
20 August 2003	Arkadelphia 2 N, US	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	98 years	41 of 100 (Notable)
20 August 2003	Salida, US	daily high max	33.3 C (91.9 F)	0.5 C (0.9 F)	104 years	41 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

1797 to 2003

Records set or tied on this calendar date in each year from 1797 to 2003. 2003 had 1,031 records.

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

Records on 08-20 in each year
Year	Records
1797	1
1807	1
1809	2
1816	1
1830	1
1832	1
1838	1
1840	1
1842	1
1846	1
1849	1
1850	1
1852	1
1858	3
1863	5
1867	4
1870	3
1871	1
1873	1
1875	2
1877	1
1883	2
1884	2
1885	6
1886	1
1888	1
1889	2
1890	2
1891	2
1892	6
1893	1
1894	1
1895	1
1896	5
1897	6
1898	1
1899	5
1900	7
1901	12
1902	3
1903	7
1904	30
1905	7
1906	26
1907	15
1908	21
1909	69
1910	7
1911	18
1912	25
1913	23
1914	15
1915	14
1916	74
1917	51
1918	69
1919	25
1920	47
1921	23
1922	52
1923	83
1924	132
1925	193
1926	187
1927	338
1928	101
1929	213
1930	318
1931	214
1932	299
1933	324
1934	376
1935	339
1936	543
1937	537
1938	250
1939	448
1940	695
1941	230
1942	429
1943	436
1944	355
1945	398
1946	349
1947	988
1948	403
1949	431
1950	1,341
1951	824
1952	425
1953	441
1954	476
1955	848
1956	678
1957	342
1958	281
1959	764
1960	465
1961	520
1962	684
1963	577
1964	629
1965	470
1966	1,094
1967	657
1968	862
1969	608
1970	414
1971	585
1972	522
1973	490
1974	565
1975	411
1976	894
1977	860
1978	563
1979	1,009
1980	991
1981	856
1982	620
1983	1,465
1984	696
1985	666
1986	819
1987	564
1988	991
1989	603
1990	1,262
1991	804
1992	1,168
1993	759
1994	719
1995	1,113
1996	900
1997	1,214
1998	802
1999	810
2000	989
2001	909
2002	1,208
2003	1,031
2004	1,333
2005	1,112
2006	851
2007	1,955
2008	1,170
2009	1,414
2010	1,028
2011	987
2012	1,086
2013	545
2014	582
2015	1,075
2016	872
2017	324
2018	657
2019	698
2020	1,051
2021	1,028
2022	1,038
2023	1,479
2024	589
2025	1,134
2026	985

Download the Data

Data for records on 2003-08-20: 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 2026-10-16 (16 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 10	639
10 to 20	41
20 to 30	13
30 to 40	6
40 to 50	2
50 to 60	2
60 to 70	1
70 to 80	1