Weather Records on 1 September 1945

497 weather records were set or tied worldwide on 1 September 1945. Highest significance: Collaroy Station, AU.

Key Facts for 1 September 1945

On 1 September 1945, 497 weather records were set or tied at long-record stations worldwide.
212 were record highs and 20 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 41 monthly and 455 daily.
Collaroy Station set a daily record precipitation of 45.2 mm (1.8 in) on 1 September 1945.
Across 161 earlier years (1797 to 2026) the same calendar date averaged 441 records.

Record Map

497 stations

497 station records on 1 September 1945 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 1 September 1945: highest significance records shown on the map
Station	Country	Type	Value	Significance
Collaroy Station	Australia	Record daily precipitation	45.2 mm (1.8 in)	49 of 100 (Notable)
Gatcombe Head	Australia	Record daily precipitation	37.1 mm (1.5 in)	49 of 100 (Notable)
Marlborough Post Office	Australia	Record daily precipitation	42.7 mm (1.7 in)	47 of 100 (Notable)
Sorel	Canada	Record daily precipitation	55.9 mm (2.2 in)	46 of 100 (Notable)
Bundaberg Post Office	Australia	Record daily precipitation	42.9 mm (1.7 in)	45 of 100 (Notable)
Gladstone Post Office	Australia	Record daily precipitation	31.0 mm (1.2 in)	45 of 100 (Notable)
Calliope Post Office	Australia	Record daily precipitation	35.6 mm (1.4 in)	44 of 100 (Notable)
Raglan	Australia	Record daily precipitation	28.4 mm (1.1 in)	43 of 100 (Notable)
Mio Hydro Plt	United States	Record daily precipitation	34.5 mm (1.4 in)	41 of 100 (Notable)
Annanvale	Australia	Record daily precipitation	35.6 mm (1.4 in)	40 of 100 (Notable)
Saginaw Mbs Intl AP	United States	Record daily precipitation	83.1 mm (3.3 in)	40 of 100 (Notable)
St Lawrence Post Office	Australia	Record daily precipitation	39.9 mm (1.6 in)	39 of 100 (Notable)
Miriam Vale	Australia	Record daily precipitation	33.0 mm (1.3 in)	38 of 100 (Notable)
Nebo	Australia	Record daily precipitation	26.7 mm (1.1 in)	37 of 100 (Notable)
Owosso Wwtp	United States	Record daily precipitation	52.1 mm (2.1 in)	36 of 100 (Notable)
Mount Larcom Post Office	Australia	Record daily precipitation	30.7 mm (1.2 in)	35 of 100 (Notable)
Walkerton	Canada	Record daily precipitation	32.3 mm (1.3 in)	35 of 100 (Notable)
Owk	India	Record daily precipitation	55.9 mm (2.2 in)	35 of 100 (Notable)
Ravenswood Post Office	Australia	Record daily precipitation	29.2 mm (1.1 in)	34 of 100 (Routine)
Waterloo	Australia	Record daily precipitation	38.1 mm (1.5 in)	34 of 100 (Routine)
Pialba Post Office	Australia	Record daily precipitation	40.9 mm (1.6 in)	34 of 100 (Routine)
Hanamkonda	India	Record daily precipitation	74.9 mm (2.9 in)	34 of 100 (Routine)
Kukuihaele Mill 206	United States	Record high minimum temperature	26.1 C (79.0 F)	34 of 100 (Routine)
Goodwood Rail STN	Australia	Record daily precipitation	25.4 mm (1.0 in)	33 of 100 (Routine)
Rosedale Post Office	Australia	Record daily precipitation	32.0 mm (1.3 in)	33 of 100 (Routine)
Quebec	Canada	Record daily precipitation	38.9 mm (1.5 in)	33 of 100 (Routine)
Bic	Canada	Record daily precipitation	46.0 mm (1.8 in)	33 of 100 (Routine)
Isis Junction Railway STN	Australia	Record daily precipitation	28.4 mm (1.1 in)	32 of 100 (Routine)
State College	United States	Record high minimum temperature	22.8 C (73.0 F)	32 of 100 (Routine)
Simcoe	Canada	Record high minimum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Nicolet	Canada	Record daily precipitation	35.8 mm (1.4 in)	30 of 100 (Routine)
Howard Post Office	Australia	Record daily precipitation	44.2 mm (1.7 in)	29 of 100 (Routine)
St Fereol	Canada	Record daily precipitation	91.2 mm (3.6 in)	29 of 100 (Routine)
Peapalli(Pyapali)	India	Record daily precipitation	43.4 mm (1.7 in)	29 of 100 (Routine)
Dillon U of Montana Western	United States	Record high maximum temperature	33.3 C (91.9 F)	29 of 100 (Routine)
Sherbrooke	Canada	Record daily precipitation	37.6 mm (1.5 in)	28 of 100 (Routine)
Santaravur	India	Record daily precipitation	48.3 mm (1.9 in)	28 of 100 (Routine)
Anderson Wtr Wks	United States	Record daily precipitation	28.4 mm (1.1 in)	28 of 100 (Routine)
Missoula 6 NW WFO	United States	Record high maximum temperature	35.0 C (95.0 F)	28 of 100 (Routine)
Grand Falls	Canada	Record daily precipitation	42.2 mm (1.7 in)	27 of 100 (Routine)
Kurseong	India	Record daily precipitation	198.9 mm (7.8 in)	27 of 100 (Routine)
Central Michigan UNIV	United States	Record daily precipitation	72.6 mm (2.9 in)	27 of 100 (Routine)
Millaquin Sugar	Australia	Record daily precipitation	35.6 mm (1.4 in)	26 of 100 (Routine)
Drummondville	Canada	Record daily precipitation	61.2 mm (2.4 in)	26 of 100 (Routine)
Salmon AP	United States	Record high maximum temperature	36.7 C (98.1 F)	26 of 100 (Routine)
Big Rapids Wtp	United States	Record daily precipitation	51.8 mm (2.0 in)	26 of 100 (Routine)
Snake Creek Powerhouse	United States	Record high maximum temperature	32.2 C (90.0 F)	26 of 100 (Routine)
Darsi	India	Record daily precipitation	43.2 mm (1.7 in)	25 of 100 (Routine)
Guayama 1SW	Puerto Rico [United States]	Record low minimum temperature	20.6 C (69.1 F)	25 of 100 (Routine)
Tempe 3 S	United States	Record high minimum temperature	27.2 C (81.0 F)	25 of 100 (Routine)
Chinaganjam	India	Record daily precipitation	70.9 mm (2.8 in)	24 of 100 (Routine)
Shoshone 1 WNW	United States	Record high maximum temperature	37.8 C (100.0 F)	24 of 100 (Routine)
Fairmont	United States	Record daily precipitation	29.0 mm (1.1 in)	24 of 100 (Routine)
Tadpatri	India	Record daily precipitation	82.6 mm (3.3 in)	23 of 100 (Routine)
Alamur(Alamar)	India	Record daily precipitation	55.9 mm (2.2 in)	23 of 100 (Routine)
Bhimavaram	India	Record daily precipitation	61.7 mm (2.4 in)	23 of 100 (Routine)
Gudur(Guduru)	India	Record daily precipitation	76.2 mm (3.0 in)	23 of 100 (Routine)
Meeker	United States	Record high maximum temperature	33.9 C (93.0 F)	23 of 100 (Routine)
Springfield 1 SE	United States	Record high minimum temperature	19.4 C (66.9 F)	23 of 100 (Routine)
Pincher Creek Town	Canada	Record high maximum temperature	29.4 C (84.9 F)	22 of 100 (Routine)

Counts by Type and Timescale

497 records

Records set or tied on 1 September 1945 by type: Highest daily maximum 114, Lowest daily maximum 6, Highest daily minimum 98, Lowest daily minimum 14, Heaviest daily rainfall 265.

Records on 1 September 1945 by type
Record type	Records
Highest daily maximum	114
Lowest daily maximum	6
Highest daily minimum	98
Lowest daily minimum	14
Heaviest daily rainfall	265
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 1 September 1945 by timescale: all-time 1, monthly 41, daily 455.

How Much Records Were Beaten By

394 broken records

Margins by which the 394 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 60.7. Ties are not counted.

Top 20 by Significance

1 September 1945

Top 20 records on 1 September 1945 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 September 1945	Collaroy Station, AU	daily rain	45.2 mm (1.8 in)	44.4 mm (1.7 in)	36 years	49 of 100 (Notable)
1 September 1945	Gatcombe Head, AU	daily rain	37.1 mm (1.5 in)	37.1 mm (1.5 in)	47 years	49 of 100 (Notable)
1 September 1945	Marlborough Post Office, AU	daily rain	42.7 mm (1.7 in)	39.7 mm (1.6 in)	24 years	47 of 100 (Notable)
1 September 1945	Sorel, CA	daily rain	55.9 mm (2.2 in)	47.8 mm (1.9 in)	10 years	46 of 100 (Notable)
1 September 1945	Bundaberg Post Office, AU	daily rain	42.9 mm (1.7 in)	33.5 mm (1.3 in)	44 years	45 of 100 (Notable)
1 September 1945	Gladstone Post Office, AU	daily rain	31.0 mm (1.2 in)	21.3 mm (0.8 in)	53 years	45 of 100 (Notable)
1 September 1945	Calliope Post Office, AU	daily rain	35.6 mm (1.4 in)	35.6 mm (1.4 in)	31 years	44 of 100 (Notable)
1 September 1945	Raglan, AU	daily rain	28.4 mm (1.1 in)	28.4 mm (1.1 in)	48 years	43 of 100 (Notable)
1 September 1945	Mio Hydro Plt, US	daily rain	34.5 mm (1.4 in)	26.4 mm (1.0 in)	23 years	41 of 100 (Notable)
1 September 1945	Annanvale, AU	daily rain	35.6 mm (1.4 in)	35.6 mm (1.4 in)	32 years	40 of 100 (Notable)
1 September 1945	Saginaw Mbs Intl AP, US	monthly rain	83.1 mm (3.3 in)	14.0 mm (0.6 in)	39 years	40 of 100 (Notable)
1 September 1945	St Lawrence Post Office, AU	daily rain	39.9 mm (1.6 in)	29.5 mm (1.2 in)	24 years	39 of 100 (Notable)
1 September 1945	Miriam Vale, AU	daily rain	33.0 mm (1.3 in)	20.8 mm (0.8 in)	50 years	38 of 100 (Notable)
1 September 1945	Nebo, AU	daily rain	26.7 mm (1.1 in)	20.3 mm (0.8 in)	55 years	37 of 100 (Notable)
1 September 1945	Owosso Wwtp, US	daily rain	52.1 mm (2.1 in)	30.8 mm (1.2 in)	11 years	36 of 100 (Notable)
1 September 1945	Mount Larcom Post Office, AU	daily rain	30.7 mm (1.2 in)	30.7 mm (1.2 in)	32 years	35 of 100 (Notable)
1 September 1945	Walkerton, CA	daily rain	32.3 mm (1.3 in)	22.9 mm (0.9 in)	28 years	35 of 100 (Notable)
1 September 1945	Owk, IN	daily rain	55.9 mm (2.2 in)	35.8 mm (1.4 in)	36 years	35 of 100 (Notable)
1 September 1945	Ravenswood Post Office, AU	daily rain	29.2 mm (1.1 in)	23.9 mm (0.9 in)	36 years	34 of 100 (Routine)
1 September 1945	Waterloo, AU	daily rain	38.1 mm (1.5 in)	35.8 mm (1.4 in)	28 years	34 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

1797 to 1945

Records set or tied on this calendar date in each year from 1797 to 1945. 1945 had 497 records.

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

Records on 09-01 in each year
Year	Records
1797	1
1806	1
1819	1
1827	1
1831	1
1838	1
1851	1
1853	1
1854	1
1857	1
1858	1
1859	1
1860	2
1861	1
1865	1
1866	1
1867	2
1869	3
1871	1
1873	1
1876	2
1877	2
1878	3
1879	2
1881	5
1883	1
1886	3
1887	3
1888	2
1890	2
1892	2
1894	3
1897	4
1898	10
1899	3
1900	2
1901	14
1902	5
1903	16
1904	9
1905	6
1906	26
1907	14
1908	26
1909	34
1910	22
1911	16
1912	47
1913	32
1914	23
1915	46
1916	16
1917	24
1918	31
1919	19
1920	31
1921	46
1922	67
1923	75
1924	210
1925	127
1926	182
1927	136
1928	166
1929	324
1930	264
1931	233
1932	550
1933	622
1934	654
1935	584
1936	385
1937	502
1938	373
1939	303
1940	333
1941	497
1942	532
1943	578
1944	377
1945	497
1946	642
1947	555
1948	460
1949	1,102
1950	849
1951	668
1952	644
1953	937
1954	407
1955	413
1956	504
1957	320
1958	427
1959	519
1960	408
1961	531
1962	368
1963	416
1964	621
1965	657
1966	596
1967	1,263
1968	604
1969	493
1970	502
1971	464
1972	518
1973	874
1974	895
1975	939
1976	627
1977	500
1978	809
1979	459
1980	671
1981	649
1982	642
1983	1,167
1984	619
1985	901
1986	964
1987	909
1988	651
1989	823
1990	749
1991	687
1992	1,010
1993	1,122
1994	1,291
1995	1,165
1996	823
1997	1,161
1998	1,159
1999	925
2000	1,613
2001	904
2002	778
2003	1,254
2004	827
2005	901
2006	1,157
2007	976
2008	1,204
2009	1,003
2010	1,313
2011	1,071
2012	874
2013	775
2014	515
2015	661
2016	522
2017	686
2018	399
2019	800
2020	689
2021	751
2022	1,016
2023	720
2024	938
2025	359
2026	521

Download the Data

Data for records on 1945-09-01: 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 10	293
10 to 20	55
20 to 30	28
30 to 40	14
40 to 50	2
50 to 60	1
60 to 70	1