Weather Records on 4 August 1945

355 weather records were set or tied worldwide on 4 August 1945. Highest significance: Guayama 1SW, PR.

Key Facts for 4 August 1945

On 4 August 1945, 355 weather records were set or tied at long-record stations worldwide.
71 were record highs and 70 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 10 monthly and 344 daily.
Guayama 1SW set a monthly record daily precipitation of 183.9 mm (7.2 in) on 4 August 1945.
Across 165 earlier years (1815 to 2026) the same calendar date averaged 442 records.

Record Map

355 stations

355 station records on 4 August 1945 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 August 1945: highest significance records shown on the map
Station	Country	Type	Value	Significance
Guayama 1SW	Puerto Rico [United States]	Record daily precipitation	183.9 mm (7.2 in)	61 of 100 (Major)
Gordon 6N	United States	Record daily precipitation	50.8 mm (2.0 in)	50 of 100 (Notable)
Alpine	United States	Record daily precipitation	30.7 mm (1.2 in)	49 of 100 (Notable)
Ladismith (Tnk)	South Africa	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Evanston 1 E	United States	Record daily precipitation	33.0 mm (1.3 in)	48 of 100 (Notable)
Fillmore	United States	Record daily precipitation	41.1 mm (1.6 in)	47 of 100 (Notable)
Lower Ameri Fork Pwhs	United States	Record daily precipitation	27.9 mm (1.1 in)	45 of 100 (Notable)
Ponce 4 E	Puerto Rico [United States]	Record daily precipitation	155.2 mm (6.1 in)	41 of 100 (Notable)
Ejanding	Australia	Record daily precipitation	25.7 mm (1.0 in)	40 of 100 (Notable)
Portal	United States	Record daily precipitation	33.3 mm (1.3 in)	40 of 100 (Notable)
Atlin	Canada	Record high minimum temperature	20.0 C (68.0 F)	39 of 100 (Notable)
Noonegin	Australia	Record daily precipitation	30.0 mm (1.2 in)	38 of 100 (Notable)
Santaravur	India	Record daily precipitation	74.4 mm (2.9 in)	35 of 100 (Notable)
Harapanahalli	India	Record daily precipitation	46.2 mm (1.8 in)	35 of 100 (Notable)
Isabela Substn	Puerto Rico [United States]	Record low maximum temperature	27.2 C (81.0 F)	32 of 100 (Routine)
St Peter	United States	Record daily precipitation	40.6 mm (1.6 in)	32 of 100 (Routine)
Willow City	United States	Record daily precipitation	52.3 mm (2.1 in)	31 of 100 (Routine)
Wongan Hills	Australia	Record daily precipitation	27.4 mm (1.1 in)	30 of 100 (Routine)
Albemarle	United States	Record daily precipitation	50.3 mm (2.0 in)	30 of 100 (Routine)
Pinehurst Sthrn Pines	United States	Record daily precipitation	77.5 mm (3.1 in)	29 of 100 (Routine)
Gatesville	United States	Record high minimum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Panruti	India	Record daily precipitation	66.5 mm (2.6 in)	27 of 100 (Routine)
Lares	Puerto Rico [United States]	Record daily precipitation	101.6 mm (4.0 in)	27 of 100 (Routine)
Grundy Ctr	United States	Record low maximum temperature	20.0 C (68.0 F)	27 of 100 (Routine)
Ainsworth	United States	Record daily precipitation	27.9 mm (1.1 in)	27 of 100 (Routine)
Bruce Rock	Australia	Record daily precipitation	26.7 mm (1.1 in)	26 of 100 (Routine)
Titusville	United States	Record high minimum temperature	26.7 C (80.1 F)	26 of 100 (Routine)
Bottineau	United States	Record daily precipitation	46.0 mm (1.8 in)	26 of 100 (Routine)
Mottinger	United States	Record low minimum temperature	8.3 C (46.9 F)	26 of 100 (Routine)
San German 4 W	Puerto Rico [United States]	Record low maximum temperature	26.1 C (79.0 F)	25 of 100 (Routine)
San German 4 W	Puerto Rico [United States]	Record daily precipitation	81.3 mm (3.2 in)	25 of 100 (Routine)
Agassiz Cda	Canada	Record low minimum temperature	4.4 C (39.9 F)	24 of 100 (Routine)
Goodwater	United States	Record high minimum temperature	24.4 C (75.9 F)	24 of 100 (Routine)
Southern Pines 2 W	United States	Record daily precipitation	72.6 mm (2.9 in)	24 of 100 (Routine)
Levan	United States	Record low maximum temperature	22.8 C (73.0 F)	24 of 100 (Routine)
San Jacinto	United States	Record high minimum temperature	22.8 C (73.0 F)	23 of 100 (Routine)
Greenville Dwtn AP	United States	Record daily precipitation	58.4 mm (2.3 in)	23 of 100 (Routine)
Riverdale	United States	Record high minimum temperature	24.4 C (75.9 F)	23 of 100 (Routine)
Ust-Maja	Russia	Record low minimum temperature	1.3 C (34.3 F)	22 of 100 (Routine)
Hannah 2 N	United States	Record daily precipitation	55.9 mm (2.2 in)	22 of 100 (Routine)
Williamsburg 2 NW	United States	Record daily precipitation	57.7 mm (2.3 in)	22 of 100 (Routine)
Minocqua	United States	Record low minimum temperature	0.0 C (32.0 F)	22 of 100 (Routine)
Bunbury Post Office	Australia	Record daily precipitation	25.9 mm (1.0 in)	21 of 100 (Routine)
Ninette	Canada	Record daily precipitation	30.0 mm (1.2 in)	21 of 100 (Routine)
Manati 2 E	Puerto Rico [United States]	Record daily precipitation	48.3 mm (1.9 in)	21 of 100 (Routine)
Grand Forks UNIV (NWS)	United States	Record low maximum temperature	18.3 C (64.9 F)	21 of 100 (Routine)
Jamestown State Hosp	United States	Record daily precipitation	32.8 mm (1.3 in)	21 of 100 (Routine)
Coondambo	Australia	Record daily precipitation	10.9 mm (0.4 in)	20 of 100 (Routine)
The Granites	Australia	Record daily precipitation	19.8 mm (0.8 in)	20 of 100 (Routine)
Wyalkatchem	Australia	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Sugar City	United States	Record daily precipitation	10.7 mm (0.4 in)	20 of 100 (Routine)
Baandee North	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Ninghan Station	Australia	Record daily precipitation	14.7 mm (0.6 in)	20 of 100 (Routine)
Yorkrakine	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Bodallin	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Levan	United States	Record daily precipitation	16.5 mm (0.6 in)	20 of 100 (Routine)
Cardonia	Australia	Record daily precipitation	17.0 mm (0.7 in)	20 of 100 (Routine)
Piute Dam	United States	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Glenmore	Australia	Record daily precipitation	23.4 mm (0.9 in)	20 of 100 (Routine)
Oudtshoorn	South Africa	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)

Counts by Type and Timescale

355 records

Records set or tied on 4 August 1945 by type: Highest daily maximum 18, Lowest daily maximum 39, Highest daily minimum 53, Lowest daily minimum 31, Heaviest daily rainfall 214.

Records on 4 August 1945 by type
Record type	Records
Highest daily maximum	18
Lowest daily maximum	39
Highest daily minimum	53
Lowest daily minimum	31
Heaviest daily rainfall	214
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 4 August 1945 by timescale: all-time 1, monthly 10, daily 344.

How Much Records Were Beaten By

290 broken records

Margins by which the 290 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 80.3. Ties are not counted.

Top 20 by Significance

4 August 1945

Top 20 records on 4 August 1945 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 August 1945	Guayama 1SW, PR	monthly rain	183.9 mm (7.2 in)	80.3 mm (3.2 in)	27 years	61 of 100 (Major)
4 August 1945	Gordon 6N, US	daily rain	50.8 mm (2.0 in)	40.6 mm (1.6 in)	22 years	50 of 100 (Notable)
4 August 1945	Alpine, US	daily rain	30.7 mm (1.2 in)	22.1 mm (0.9 in)	44 years	49 of 100 (Notable)
4 August 1945	Ladismith (Tnk), ZA	daily rain	33.0 mm (1.3 in)	20.8 mm (0.8 in)	36 years	48 of 100 (Notable)
4 August 1945	Evanston 1 E, US	daily rain	33.0 mm (1.3 in)	18.0 mm (0.7 in)	28 years	48 of 100 (Notable)
4 August 1945	Fillmore, US	monthly rain	41.1 mm (1.6 in)	14.2 mm (0.6 in)	0 years	47 of 100 (Notable)
4 August 1945	Lower Ameri Fork Pwhs, US	daily rain	27.9 mm (1.1 in)	20.3 mm (0.8 in)	31 years	45 of 100 (Notable)
4 August 1945	Ponce 4 E, PR	monthly rain	155.2 mm (6.1 in)	44.5 mm (1.8 in)	7 years	41 of 100 (Notable)
4 August 1945	Ejanding, AU	daily rain	25.7 mm (1.0 in)	16.0 mm (0.6 in)	14 years	40 of 100 (Notable)
4 August 1945	Portal, US	daily rain	33.3 mm (1.3 in)	23.1 mm (0.9 in)	49 years	40 of 100 (Notable)
4 August 1945	Atlin, CA	all-time high min	20.0 C (68.0 F)	3.9 C (7.0 F)	9 years	39 of 100 (Notable)
4 August 1945	Noonegin, AU	daily rain	30.0 mm (1.2 in)	14.8 mm (0.6 in)	14 years	38 of 100 (Notable)
4 August 1945	Santaravur, IN	daily rain	74.4 mm (2.9 in)	47.5 mm (1.9 in)	12 years	35 of 100 (Notable)
4 August 1945	Harapanahalli, IN	daily rain	46.2 mm (1.8 in)	24.6 mm (1.0 in)	19 years	35 of 100 (Notable)
4 August 1945	Isabela Substn, PR	daily low max	27.2 C (81.0 F)	2.2 C (4.0 F)	36 years	32 of 100 (Routine)
4 August 1945	St Peter, US	daily rain	40.6 mm (1.6 in)	21.5 mm (0.8 in)	38 years	32 of 100 (Routine)
4 August 1945	Willow City, US	monthly rain	52.3 mm (2.1 in)	5.1 mm (0.20 in)	34 years	31 of 100 (Routine)
4 August 1945	Wongan Hills, AU	daily rain	27.4 mm (1.1 in)	12.2 mm (0.5 in)	14 years	30 of 100 (Routine)
4 August 1945	Albemarle, US	daily rain	50.3 mm (2.0 in)	22.4 mm (0.9 in)	34 years	30 of 100 (Routine)
4 August 1945	Pinehurst Sthrn Pines, US	daily rain	77.5 mm (3.1 in)	26.7 mm (1.1 in)	40 years	29 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

1815 to 1945

Records set or tied on this calendar date in each year from 1815 to 1945. 1945 had 355 records.

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

Records on 08-04 in each year
Year	Records
1815	1
1827	1
1830	2
1833	1
1835	1
1843	1
1846	1
1847	1
1848	1
1857	1
1859	2
1860	2
1863	1
1865	3
1867	1
1868	1
1870	1
1871	1
1872	2
1874	3
1875	1
1878	3
1879	1
1881	2
1882	1
1883	1
1885	3
1886	1
1887	3
1888	4
1889	2
1890	1
1891	2
1893	2
1894	1
1895	3
1896	4
1897	3
1898	1
1899	7
1900	6
1902	4
1903	18
1904	11
1905	19
1906	14
1907	20
1908	31
1909	27
1910	17
1911	23
1912	51
1913	15
1914	33
1915	85
1916	97
1917	29
1918	95
1919	34
1920	79
1921	67
1922	68
1923	146
1924	132
1925	77
1926	334
1927	136
1928	352
1929	224
1930	698
1931	371
1932	258
1933	347
1934	521
1935	367
1936	719
1937	258
1938	489
1939	433
1940	236
1941	383
1942	303
1943	468
1944	662
1945	355
1946	265
1947	845
1948	558
1949	421
1950	666
1951	680
1952	465
1953	1,017
1954	426
1955	624
1956	437
1957	343
1958	533
1959	303
1960	331
1961	745
1962	470
1963	438
1964	885
1965	409
1966	552
1967	428
1968	280
1969	638
1970	415
1971	813
1972	773
1973	748
1974	1,040
1975	772
1976	801
1977	599
1978	1,051
1979	510
1980	998
1981	636
1982	703
1983	920
1984	722
1985	634
1986	905
1987	892
1988	1,204
1989	738
1990	1,013
1991	769
1992	754
1993	1,046
1994	1,265
1995	1,117
1996	1,143
1997	891
1998	1,423
1999	762
2000	840
2001	1,087
2002	928
2003	1,309
2004	968
2005	1,246
2006	1,131
2007	685
2008	883
2009	681
2010	1,665
2011	1,536
2012	738
2013	452
2014	980
2015	505
2016	732
2017	1,134
2018	760
2019	499
2020	778
2021	691
2022	1,185
2023	1,150
2024	809
2025	840
2026	1,044

Download the Data

Data for records on 1945-08-04: 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 20	272
20 to 40	14
40 to 60	3
60 to 80	0
80 to 100	1