Weather Records on 17 September 1927

420 weather records were set or tied worldwide on 17 September 1927. Highest significance: Hillsboro, US.

Key Facts for 17 September 1927

On 17 September 1927, 420 weather records were set or tied at long-record stations worldwide.
355 were record highs and 7 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 9 monthly and 408 daily.
Hillsboro set an all-time record daily precipitation of 158.8 mm (6.3 in) on 17 September 1927.
Across 164 earlier years (1796 to 2026) the same calendar date averaged 423 records.

Record Map

420 stations

420 station records on 17 September 1927 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 September 1927: highest significance records shown on the map
Station	Country	Type	Value	Significance
Hillsboro	United States	Record daily precipitation	158.8 mm (6.3 in)	63 of 100 (Major)
Uccle	Belgium	Record low maximum temperature	12.6 C (54.7 F)	36 of 100 (Notable)
Bowral Post Office	Australia	Record daily precipitation	41.4 mm (1.6 in)	32 of 100 (Routine)
Milton Post Office	Australia	Record daily precipitation	52.1 mm (2.1 in)	32 of 100 (Routine)
Kvikkjokk-Arrenjarka	Sweden	Record daily precipitation	35.4 mm (1.4 in)	32 of 100 (Routine)
Bay Saint Louis	United States	Record high maximum temperature	39.4 C (102.9 F)	31 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record daily precipitation	40.1 mm (1.6 in)	30 of 100 (Routine)
Sydney (Observatory Hill)	Australia	Record low maximum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
Batemans Bay Post Office	Australia	Record daily precipitation	40.6 mm (1.6 in)	25 of 100 (Routine)
Fichtelberg	Germany	Record daily precipitation	54.5 mm (2.1 in)	25 of 100 (Routine)
Berry Masonic Village	Australia	Record daily precipitation	26.4 mm (1.0 in)	23 of 100 (Routine)
Uniontown	United States	Record high maximum temperature	39.4 C (102.9 F)	23 of 100 (Routine)
Britt 3E	United States	Record daily precipitation	41.9 mm (1.6 in)	23 of 100 (Routine)
Nowra Council Offices	Australia	Record daily precipitation	30.5 mm (1.2 in)	21 of 100 (Routine)
Chemnitz	Germany	Record daily precipitation	35.0 mm (1.4 in)	21 of 100 (Routine)
Columbus	United States	Record high maximum temperature	38.3 C (100.9 F)	21 of 100 (Routine)
Traverse Cy Cherry Capital AP	United States	Record high minimum temperature	23.9 C (75.0 F)	21 of 100 (Routine)
Bamberg	Germany	Record daily precipitation	24.0 mm (0.9 in)	20 of 100 (Routine)
Praha-Klementinum	Czech Republic	Record daily precipitation	18.7 mm (0.7 in)	20 of 100 (Routine)
Gorlitz	Germany	Record daily precipitation	23.6 mm (0.9 in)	20 of 100 (Routine)
Tarnaby	Sweden	Record daily precipitation	22.0 mm (0.9 in)	20 of 100 (Routine)
Jokkmokk	Sweden	Record daily precipitation	20.5 mm (0.8 in)	20 of 100 (Routine)
Nossen	Germany	Record daily precipitation	24.2 mm (1.0 in)	20 of 100 (Routine)
Karesuando	Sweden	Record daily precipitation	9.3 mm (0.37 in)	20 of 100 (Routine)
Junsele	Sweden	Record daily precipitation	22.8 mm (0.9 in)	20 of 100 (Routine)
Oestersund-Froesoen	Sweden	Record daily precipitation	14.1 mm (0.6 in)	20 of 100 (Routine)
Speers Ferry	United States	Record daily precipitation	19.1 mm (0.8 in)	20 of 100 (Routine)
Ilulissat (Jakobshavn)	Greenland [Denmark]	Record high minimum temperature	4.8 C (40.6 F)	20 of 100 (Routine)
Heinersreuth-Vollhof	Germany	Record daily precipitation	19.2 mm (0.8 in)	20 of 100 (Routine)
Susendal	Norway	Record daily precipitation	16.8 mm (0.7 in)	20 of 100 (Routine)
Montgomery Wb City	United States	Record high maximum temperature	38.9 C (102.0 F)	20 of 100 (Routine)
Walnut Grove	United States	Record daily precipitation	15.7 mm (0.6 in)	20 of 100 (Routine)
Aurora Water	United States	Record daily precipitation	31.2 mm (1.2 in)	20 of 100 (Routine)
Falun	Sweden	Record daily precipitation	20.9 mm (0.8 in)	19 of 100 (Routine)
Eufaula	United States	Record high maximum temperature	39.4 C (102.9 F)	19 of 100 (Routine)
Lake Moraine	United States	Record daily precipitation	12.7 mm (0.5 in)	19 of 100 (Routine)
Highland Home	United States	Record high maximum temperature	37.8 C (100.0 F)	18 of 100 (Routine)
Granite Reef Dam	United States	Record low maximum temperature	31.1 C (88.0 F)	18 of 100 (Routine)
Butlerville 2 WNW	United States	Record high maximum temperature	36.1 C (97.0 F)	18 of 100 (Routine)
Madison Sewage Plt	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Seymour 1 WSW	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Eubank	United States	Record high maximum temperature	35.6 C (96.1 F)	18 of 100 (Routine)
Aberdeen	United States	Record high maximum temperature	40.0 C (104.0 F)	18 of 100 (Routine)
Kirksville	United States	Record high maximum temperature	36.1 C (97.0 F)	18 of 100 (Routine)
Urbana Wrf	United States	Record high maximum temperature	35.0 C (95.0 F)	18 of 100 (Routine)
Newberry	United States	Record high minimum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Sewanee	United States	Record high minimum temperature	23.9 C (75.0 F)	18 of 100 (Routine)
Baku	Azerbaijan	Record daily precipitation	6.7 mm (0.26 in)	17 of 100 (Routine)
Pakri	Estonia	Record daily precipitation	15.5 mm (0.6 in)	17 of 100 (Routine)
Clanton	United States	Record high maximum temperature	37.8 C (100.0 F)	17 of 100 (Routine)
Florence	United States	Record high maximum temperature	37.8 C (100.0 F)	17 of 100 (Routine)
Greensboro	United States	Record high maximum temperature	37.8 C (100.0 F)	17 of 100 (Routine)
Keosauqua	United States	Record high maximum temperature	37.2 C (99.0 F)	17 of 100 (Routine)
Oskaloosa	United States	Record high maximum temperature	35.6 C (96.1 F)	17 of 100 (Routine)
Lancaster 2 NW	United States	Record high maximum temperature	33.9 C (93.0 F)	17 of 100 (Routine)
Trenton 1 NNE	United States	Record high maximum temperature	37.2 C (99.0 F)	17 of 100 (Routine)
Lynchburg - Coop	United States	Record high minimum temperature	21.7 C (71.1 F)	17 of 100 (Routine)
Lexington Bluegrass AP	United States	Record high maximum temperature	33.3 C (91.9 F)	17 of 100 (Routine)
Chatham 2	Canada	Record high maximum temperature	33.9 C (93.0 F)	16 of 100 (Routine)
Stratford	Canada	Record high maximum temperature	29.4 C (84.9 F)	16 of 100 (Routine)

Counts by Type and Timescale

420 records

Records set or tied on 17 September 1927 by type: Highest daily maximum 261, Lowest daily maximum 5, Highest daily minimum 94, Lowest daily minimum 2, Heaviest daily rainfall 58.

Records on 17 September 1927 by type
Record type	Records
Highest daily maximum	261
Lowest daily maximum	5
Highest daily minimum	94
Lowest daily minimum	2
Heaviest daily rainfall	58
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 17 September 1927 by timescale: all-time 3, monthly 9, daily 408.

How Much Records Were Beaten By

312 broken records

Margins by which the 312 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 58.5. Ties are not counted.

Top 20 by Significance

17 September 1927

Top 20 records on 17 September 1927 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 September 1927	Hillsboro, US	all-time rain	158.8 mm (6.3 in)	58.5 mm (2.3 in)	1 year	63 of 100 (Major)
17 September 1927	Uccle, BE	daily low max	12.6 C (54.7 F)	1.5 C (2.7 F)	79 years	36 of 100 (Notable)
17 September 1927	Bowral Post Office, AU	daily rain	41.4 mm (1.6 in)	24.6 mm (1.0 in)	9 years	32 of 100 (Routine)
17 September 1927	Milton Post Office, AU	daily rain	52.1 mm (2.1 in)	20.1 mm (0.8 in)	47 years	32 of 100 (Routine)
17 September 1927	Kvikkjokk-Arrenjarka, SE	monthly rain	35.4 mm (1.4 in)	6.1 mm (0.24 in)	22 years	32 of 100 (Routine)
17 September 1927	Bay Saint Louis, US	all-time high max	39.4 C (102.9 F)	0.5 C (0.9 F)	26 years	31 of 100 (Routine)
17 September 1927	Sydney (Observatory Hill), AU	daily rain	40.1 mm (1.6 in)	11.7 mm (0.5 in)	47 years	30 of 100 (Routine)
17 September 1927	Sydney (Observatory Hill), AU	daily low max	13.9 C (57.0 F)	0.7 C (1.3 F)	67 years	28 of 100 (Routine)
17 September 1927	Batemans Bay Post Office, AU	daily rain	40.6 mm (1.6 in)	29.2 mm (1.1 in)	16 years	25 of 100 (Routine)
17 September 1927	Fichtelberg, DE	monthly rain	54.5 mm (2.1 in)	2.4 mm (0.09 in)	32 years	25 of 100 (Routine)
17 September 1927	Berry Masonic Village, AU	daily rain	26.4 mm (1.0 in)	14.2 mm (0.6 in)	39 years	23 of 100 (Routine)
17 September 1927	Uniontown, US	daily high max	39.4 C (102.9 F)	3.8 C (6.8 F)	30 years	23 of 100 (Routine)
17 September 1927	Britt 3E, US	daily rain	41.9 mm (1.6 in)	19.5 mm (0.8 in)	20 years	23 of 100 (Routine)
17 September 1927	Nowra Council Offices, AU	daily rain	30.5 mm (1.2 in)	18.6 mm (0.7 in)	9 years	21 of 100 (Routine)
17 September 1927	Chemnitz, DE	daily rain	35.0 mm (1.4 in)	5.2 mm (0.20 in)	33 years	21 of 100 (Routine)
17 September 1927	Columbus, US	daily high max	38.3 C (100.9 F)	5.5 C (9.9 F)	29 years	21 of 100 (Routine)
17 September 1927	Traverse Cy Cherry Capital AP, US	daily high min	23.9 C (75.0 F)	5.6 C (10.1 F)	20 years	21 of 100 (Routine)
17 September 1927	Bamberg, DE	daily rain	24.0 mm (0.9 in)	19.3 mm (0.8 in)	33 years	20 of 100 (Routine)
17 September 1927	Praha-Klementinum, CZ	daily rain	18.7 mm (0.7 in)	2.6 mm (0.10 in)	81 years	20 of 100 (Routine)
17 September 1927	Gorlitz, DE	daily rain	23.6 mm (0.9 in)	15.4 mm (0.6 in)	24 years	20 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 1927

Records set or tied on this calendar date in each year from 1796 to 1927. 1927 had 420 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 1927-09-17: 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 10	296
10 to 20	12
20 to 30	3
30 to 40	0
40 to 50	0
50 to 60	1