Weather Records on 17 September 1948

630 weather records were set or tied worldwide on 17 September 1948. Highest significance: Dinmore Post Office, AU.

Key Facts for 17 September 1948

On 17 September 1948, 630 weather records were set or tied at long-record stations worldwide.
336 were record highs and 101 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 616 daily.
Dinmore Post Office set a daily record precipitation of 56.1 mm (2.2 in) on 17 September 1948.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 421 records.

Record Map

630 stations

630 station records on 17 September 1948 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1948: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dinmore Post Office	Australia	Record daily precipitation	56.1 mm (2.2 in)	49 of 100 (Notable)
Nevertire (Clyde St)	Australia	Record daily precipitation	47.8 mm (1.9 in)	46 of 100 (Notable)
Albert (the Meadows)	Australia	Record daily precipitation	30.7 mm (1.2 in)	45 of 100 (Notable)
Narromine (Mumble Peg)	Australia	Record daily precipitation	53.3 mm (2.1 in)	45 of 100 (Notable)
Gunningbar	Australia	Record daily precipitation	59.7 mm (2.4 in)	45 of 100 (Notable)
Guayama 1SW	Puerto Rico [United States]	Record daily precipitation	101.6 mm (4.0 in)	44 of 100 (Notable)
Mullaley (Bando)	Australia	Record daily precipitation	73.2 mm (2.9 in)	39 of 100 (Notable)
Campbells Hill	Australia	Record daily precipitation	80.0 mm (3.1 in)	39 of 100 (Notable)
Bridport Post Office	Australia	Record daily precipitation	41.1 mm (1.6 in)	38 of 100 (Notable)
Toronto	Canada	Record high maximum temperature	32.2 C (90.0 F)	38 of 100 (Notable)
Wallan (Walnarring)	Australia	Record daily precipitation	28.4 mm (1.1 in)	37 of 100 (Notable)
Olinda	Australia	Record daily precipitation	42.4 mm (1.7 in)	36 of 100 (Notable)
Meja	India	Record daily precipitation	110.0 mm (4.3 in)	36 of 100 (Notable)
Briksdal	Norway	Record daily precipitation	72.0 mm (2.8 in)	34 of 100 (Routine)
Hovlandsdal	Norway	Record daily precipitation	115.0 mm (4.5 in)	34 of 100 (Routine)
Warren (Haddon Rig)	Australia	Record daily precipitation	27.7 mm (1.1 in)	33 of 100 (Routine)
Tulloona (Coolanga)	Australia	Record daily precipitation	32.0 mm (1.3 in)	33 of 100 (Routine)
Wollong	Australia	Record daily precipitation	80.0 mm (3.1 in)	33 of 100 (Routine)
Corowa (Ringwood Park)	Australia	Record daily precipitation	34.5 mm (1.4 in)	33 of 100 (Routine)
Phulpur	India	Record daily precipitation	69.3 mm (2.7 in)	33 of 100 (Routine)
Hornindal	Norway	Record daily precipitation	47.7 mm (1.9 in)	32 of 100 (Routine)
Narrandera Post Office	Australia	Record daily precipitation	51.1 mm (2.0 in)	31 of 100 (Routine)
Botnen I Forde	Norway	Record daily precipitation	78.2 mm (3.1 in)	31 of 100 (Routine)
Boolcarrol	Australia	Record daily precipitation	30.7 mm (1.2 in)	30 of 100 (Routine)
Leeton Caravan Park	Australia	Record daily precipitation	37.6 mm (1.5 in)	30 of 100 (Routine)
Fredericton Unb	Canada	Record low minimum temperature	-1.1 C (30.0 F)	30 of 100 (Routine)
Gurley (Glenroy)	Australia	Record daily precipitation	26.7 mm (1.1 in)	29 of 100 (Routine)
Aberdeen (Main Rd)	Australia	Record daily precipitation	38.9 mm (1.5 in)	29 of 100 (Routine)
Avoca (Railway House)	Australia	Record daily precipitation	25.4 mm (1.0 in)	29 of 100 (Routine)
Campbell Town Post Office	Australia	Record daily precipitation	35.8 mm (1.4 in)	29 of 100 (Routine)
Chicoutimi	Canada	Record low maximum temperature	9.4 C (48.9 F)	29 of 100 (Routine)
Machhlisnahr	India	Record daily precipitation	54.6 mm (2.1 in)	29 of 100 (Routine)
Sheboygan	United States	Record high maximum temperature	34.4 C (93.9 F)	29 of 100 (Routine)
La Pocatiere Cda	Canada	Record daily precipitation	40.4 mm (1.6 in)	27 of 100 (Routine)
Caguas	Puerto Rico [United States]	Record daily precipitation	78.2 mm (3.1 in)	27 of 100 (Routine)
Saint Paul Is AP	United States	Record low minimum temperature	-1.1 C (30.0 F)	27 of 100 (Routine)
Warren (Frawley St)	Australia	Record daily precipitation	32.8 mm (1.3 in)	26 of 100 (Routine)
Dubbo (Mentone)	Australia	Record daily precipitation	39.9 mm (1.6 in)	26 of 100 (Routine)
Balldale Post Office	Australia	Record daily precipitation	39.9 mm (1.6 in)	26 of 100 (Routine)
York Plains (Handroyd)	Australia	Record daily precipitation	29.0 mm (1.1 in)	26 of 100 (Routine)
Sidhauli	India	Record daily precipitation	98.0 mm (3.9 in)	26 of 100 (Routine)
E Tawas	United States	Record high maximum temperature	31.7 C (89.1 F)	26 of 100 (Routine)
Sandy Lake Dam Libby	United States	Record high minimum temperature	20.6 C (69.1 F)	26 of 100 (Routine)
Dulce	United States	Record high minimum temperature	14.4 C (57.9 F)	26 of 100 (Routine)
Eau Claire	United States	Record high minimum temperature	23.3 C (73.9 F)	26 of 100 (Routine)
Spooner Ag Rsch STN	United States	Record high minimum temperature	21.7 C (71.1 F)	26 of 100 (Routine)
Gulargambone (Yalcogrin St)	Australia	Record daily precipitation	65.0 mm (2.6 in)	25 of 100 (Routine)
Rowena (Bungara)	Australia	Record daily precipitation	32.0 mm (1.3 in)	25 of 100 (Routine)
Cessnock Post Office	Australia	Record daily precipitation	37.6 mm (1.5 in)	25 of 100 (Routine)
Bygoo	Australia	Record daily precipitation	31.0 mm (1.2 in)	25 of 100 (Routine)
Quebec	Canada	Record low maximum temperature	11.7 C (53.1 F)	25 of 100 (Routine)
Hillsboro	United States	Record high maximum temperature	36.7 C (98.1 F)	25 of 100 (Routine)
Kewaunee	United States	Record high maximum temperature	32.2 C (90.0 F)	25 of 100 (Routine)
La Crosse Wb City	United States	Record high minimum temperature	21.7 C (71.1 F)	25 of 100 (Routine)
West Bend	United States	Record high minimum temperature	20.6 C (69.1 F)	25 of 100 (Routine)
Muswellbrook (Lower Hill St)	Australia	Record daily precipitation	36.6 mm (1.4 in)	24 of 100 (Routine)
Rouchel Brook	Australia	Record daily precipitation	39.1 mm (1.5 in)	24 of 100 (Routine)
Ridgetown	Canada	Record high maximum temperature	31.1 C (88.0 F)	24 of 100 (Routine)
Mariahu	India	Record daily precipitation	108.2 mm (4.3 in)	24 of 100 (Routine)
Minneapolis Wb Dwtn	United States	Record high minimum temperature	23.9 C (75.0 F)	24 of 100 (Routine)

Counts by Type and Timescale

630 records

Records set or tied on 17 September 1948 by type: Highest daily maximum 123, Lowest daily maximum 29, Highest daily minimum 213, Lowest daily minimum 72, Heaviest daily rainfall 193.

Records on 17 September 1948 by type
Record type	Records
Highest daily maximum	123
Lowest daily maximum	29
Highest daily minimum	213
Lowest daily minimum	72
Heaviest daily rainfall	193
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 1948 by timescale: all-time 0, monthly 14, daily 616.

How Much Records Were Beaten By

501 broken records

Margins by which the 501 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 82.3. Ties are not counted.

Top 20 by Significance

17 September 1948

Top 20 records on 17 September 1948 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1948	Dinmore Post Office, AU	daily rain	56.1 mm (2.2 in)	32.7 mm (1.3 in)	45 years	49 of 100 (Notable)
17 September 1948	Nevertire (Clyde St), AU	monthly rain	47.8 mm (1.9 in)	9.7 mm (0.38 in)	61 years	46 of 100 (Notable)
17 September 1948	Albert (the Meadows), AU	daily rain	30.7 mm (1.2 in)	22.6 mm (0.9 in)	42 years	45 of 100 (Notable)
17 September 1948	Narromine (Mumble Peg), AU	monthly rain	53.3 mm (2.1 in)	10.9 mm (0.4 in)	50 years	45 of 100 (Notable)
17 September 1948	Gunningbar, AU	monthly rain	59.7 mm (2.4 in)	21.6 mm (0.9 in)	16 years	45 of 100 (Notable)
17 September 1948	Guayama 1SW, PR	daily rain	101.6 mm (4.0 in)	82.3 mm (3.2 in)	4 years	44 of 100 (Notable)
17 September 1948	Mullaley (Bando), AU	monthly rain	73.2 mm (2.9 in)	21.1 mm (0.8 in)	16 years	39 of 100 (Notable)
17 September 1948	Campbells Hill, AU	daily rain	80.0 mm (3.1 in)	37.6 mm (1.5 in)	34 years	39 of 100 (Notable)
17 September 1948	Bridport Post Office, AU	daily rain	41.1 mm (1.6 in)	17.5 mm (0.7 in)	23 years	38 of 100 (Notable)
17 September 1948	Toronto, CA	daily high max	32.2 C (90.0 F)	2.2 C (4.0 F)	80 years	38 of 100 (Notable)
17 September 1948	Wallan (Walnarring), AU	daily rain	28.4 mm (1.1 in)	12.7 mm (0.5 in)	54 years	37 of 100 (Notable)
17 September 1948	Olinda, AU	daily rain	42.4 mm (1.7 in)	25.1 mm (1.0 in)	13 years	36 of 100 (Notable)
17 September 1948	Meja, IN	daily rain	110.0 mm (4.3 in)	55.6 mm (2.2 in)	33 years	36 of 100 (Notable)
17 September 1948	Briksdal, NO	daily rain	72.0 mm (2.8 in)	17.8 mm (0.7 in)	51 years	34 of 100 (Routine)
17 September 1948	Hovlandsdal, NO	daily rain	115.0 mm (4.5 in)	45.4 mm (1.8 in)	20 years	34 of 100 (Routine)
17 September 1948	Warren (Haddon Rig), AU	daily rain	27.7 mm (1.1 in)	17.3 mm (0.7 in)	28 years	33 of 100 (Routine)
17 September 1948	Tulloona (Coolanga), AU	daily rain	32.0 mm (1.3 in)	12.4 mm (0.5 in)	48 years	33 of 100 (Routine)
17 September 1948	Wollong, AU	daily rain	80.0 mm (3.1 in)	32.5 mm (1.3 in)	16 years	33 of 100 (Routine)
17 September 1948	Corowa (Ringwood Park), AU	daily rain	34.5 mm (1.4 in)	11.9 mm (0.5 in)	31 years	33 of 100 (Routine)
17 September 1948	Phulpur, IN	daily rain	69.3 mm (2.7 in)	45.7 mm (1.8 in)	45 years	33 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

1796 to 1948

Records set or tied on this calendar date in each year from 1796 to 1948. 1948 had 630 records.

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

Records on 09-17 in each year
Year	Records
1796	1
1797	1
1805	1
1833	1
1834	1
1837	2
1845	1
1847	3
1848	1
1850	1
1851	2
1853	2
1854	2
1859	1
1862	1
1867	1
1870	1
1871	1
1872	1
1873	1
1874	1
1875	1
1877	1
1881	1
1882	2
1884	3
1885	3
1886	6
1888	2
1889	8
1891	1
1893	3
1894	1
1895	4
1896	9
1897	4
1898	7
1899	1
1900	4
1901	5
1902	5
1903	28
1904	2
1905	17
1906	10
1907	15
1908	13
1909	7
1910	38
1911	15
1912	17
1913	28
1914	38
1915	48
1916	40
1917	255
1918	41
1919	21
1920	40
1921	66
1922	47
1923	159
1924	80
1925	338
1926	154
1927	420
1928	78
1929	168
1930	147
1931	564
1932	425
1933	415
1934	246
1935	321
1936	219
1937	463
1938	363
1939	294
1940	326
1941	328
1942	581
1943	513
1944	403
1945	614
1946	620
1947	680
1948	630
1949	292
1950	412
1951	359
1952	263
1953	344
1954	449
1955	649
1956	437
1957	405
1958	806
1959	1,210
1960	385
1961	657
1962	432
1963	297
1964	559
1965	1,394
1966	523
1967	331
1968	691
1969	352
1970	412
1971	898
1972	556
1973	638
1974	491
1975	478
1976	636
1977	641
1978	764
1979	804
1980	794
1981	1,155
1982	606
1983	862
1984	1,006
1985	448
1986	1,314
1987	926
1988	982
1989	863
1990	650
1991	1,407
1992	686
1993	950
1994	986
1995	1,145
1996	1,342
1997	1,057
1998	1,137
1999	1,102
2000	1,318
2001	895
2002	1,025
2003	586
2004	872
2005	1,042
2006	1,344
2007	752
2008	886
2009	871
2010	907
2011	1,116
2012	597
2013	1,253
2014	571
2015	953
2016	707
2017	455
2018	899
2019	774
2020	651
2021	345
2022	313
2023	646
2024	954
2025	634
2026	968

Download the Data

Data for records on 1948-09-17: 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	480
20 to 40	16
40 to 60	4
60 to 80	0
80 to 100	1