Weather Records on 23 September 1939

279 weather records were set or tied worldwide on 23 September 1939. Highest significance: Sierra Madre Henszey, US.

Key Facts for 23 September 1939

On 23 September 1939, 279 weather records were set or tied at long-record stations worldwide.
205 were record highs and 18 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 6 monthly and 270 daily.
Sierra Madre Henszey set a monthly record daily precipitation of 121.7 mm (4.8 in) on 23 September 1939.
Across 169 earlier years (1793 to 2026) the same calendar date averaged 432 records.

Record Map

279 stations

279 station records on 23 September 1939 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 September 1939: highest significance records shown on the map
Station	Country	Type	Value	Significance
Sierra Madre Henszey	United States	Record daily precipitation	121.7 mm (4.8 in)	56 of 100 (Notable)
Berkeley	United States	Record high minimum temperature	21.7 C (71.1 F)	46 of 100 (Notable)
Oakland	United States	Record high minimum temperature	21.1 C (70.0 F)	45 of 100 (Notable)
San Diego Wbo	United States	Record high minimum temperature	24.4 C (75.9 F)	45 of 100 (Notable)
Rose Isle	Australia	Record daily precipitation	31.0 mm (1.2 in)	43 of 100 (Notable)
Santa Barbara	United States	Record high maximum temperature	38.9 C (102.0 F)	41 of 100 (Notable)
Komga (Pol)	South Africa	Record daily precipitation	57.2 mm (2.3 in)	38 of 100 (Notable)
Bagodar I	India	Record daily precipitation	101.6 mm (4.0 in)	37 of 100 (Notable)
Chendipada	India	Record daily precipitation	84.6 mm (3.3 in)	35 of 100 (Notable)
Los Gatos	United States	Record high minimum temperature	22.2 C (72.0 F)	33 of 100 (Routine)
Spreckels Hwy Brg	United States	Record high minimum temperature	20.0 C (68.0 F)	33 of 100 (Routine)
Raiford State Prison	United States	Record daily precipitation	51.8 mm (2.0 in)	32 of 100 (Routine)
Santa Maria	United States	Record high minimum temperature	22.8 C (73.0 F)	31 of 100 (Routine)
Claremont Pomona Clg	United States	Record high minimum temperature	22.2 C (72.0 F)	29 of 100 (Routine)
Folsom	United States	Record high minimum temperature	23.9 C (75.0 F)	29 of 100 (Routine)
Oakland	United States	Record high maximum temperature	36.7 C (98.1 F)	29 of 100 (Routine)
Cairo Ezbekiya	Egypt	Record high maximum temperature	38.0 C (100.4 F)	28 of 100 (Routine)
Basirhat	India	Record daily precipitation	67.3 mm (2.6 in)	28 of 100 (Routine)
Pesaro	Italy	Record daily precipitation	47.6 mm (1.9 in)	27 of 100 (Routine)
Hollister 1 SW	United States	Record high maximum temperature	40.6 C (105.1 F)	27 of 100 (Routine)
Santa Barbara	United States	Record high minimum temperature	20.0 C (68.0 F)	27 of 100 (Routine)
Mhaswad	India	Record daily precipitation	69.1 mm (2.7 in)	26 of 100 (Routine)
Sacramento 5 ESE	United States	Record high minimum temperature	21.1 C (70.0 F)	26 of 100 (Routine)
Tylden "Tulden"	South Africa	Record daily precipitation	29.2 mm (1.1 in)	25 of 100 (Routine)
Cloverdale	United States	Record high minimum temperature	20.0 C (68.0 F)	24 of 100 (Routine)
Porterville	United States	Record high minimum temperature	22.2 C (72.0 F)	23 of 100 (Routine)
Riverside Fire STN 3	United States	Record high minimum temperature	19.4 C (66.9 F)	23 of 100 (Routine)
Monierkhal	India	Record daily precipitation	156.5 mm (6.2 in)	22 of 100 (Routine)
Shirol	India	Record daily precipitation	43.4 mm (1.7 in)	22 of 100 (Routine)
El Cajon 2 E	United States	Record high minimum temperature	20.0 C (68.0 F)	22 of 100 (Routine)
Le Grand	United States	Record high maximum temperature	40.6 C (105.1 F)	22 of 100 (Routine)
Lemon Cove	United States	Record high minimum temperature	25.0 C (77.0 F)	22 of 100 (Routine)
San Jacinto	United States	Record high minimum temperature	18.3 C (64.9 F)	22 of 100 (Routine)
Santa Clara UNIV	United States	Record high minimum temperature	17.8 C (64.0 F)	22 of 100 (Routine)
Sierra Madre Henszey	United States	Record high maximum temperature	38.9 C (102.0 F)	22 of 100 (Routine)
Suri	India	Record daily precipitation	74.2 mm (2.9 in)	21 of 100 (Routine)
Kjahta	Russia	Record high minimum temperature	7.8 C (46.0 F)	21 of 100 (Routine)
San Jose	United States	Record high maximum temperature	37.8 C (100.0 F)	21 of 100 (Routine)
San Jose	United States	Record high minimum temperature	20.6 C (69.1 F)	21 of 100 (Routine)
Henichesk	Ukraine	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Forbes (Camp Street)	Australia	Record low minimum temperature	1.2 C (34.2 F)	20 of 100 (Routine)
Mangaon	India	Record daily precipitation	64.8 mm (2.6 in)	20 of 100 (Routine)
Jejuri	India	Record daily precipitation	109.2 mm (4.3 in)	20 of 100 (Routine)
Mayaguez City	Puerto Rico [United States]	Record high maximum temperature	36.7 C (98.1 F)	20 of 100 (Routine)
Los Gatos	United States	Record high maximum temperature	37.8 C (100.0 F)	20 of 100 (Routine)
Oroville 1 N	United States	Record high minimum temperature	20.0 C (68.0 F)	20 of 100 (Routine)
Redlands	United States	Record high minimum temperature	21.1 C (70.0 F)	20 of 100 (Routine)
Santa Maria	United States	Record high maximum temperature	36.1 C (97.0 F)	20 of 100 (Routine)
Taganrog (Lighthouse)	Russia	Record daily precipitation	26.1 mm (1.0 in)	19 of 100 (Routine)
Millwood (Bos)	South Africa	Record daily precipitation	14.2 mm (0.6 in)	19 of 100 (Routine)
Denair 3 NNE	United States	Record high maximum temperature	40.0 C (104.0 F)	19 of 100 (Routine)
Napa State Hospital	United States	Record high maximum temperature	41.1 C (106.0 F)	19 of 100 (Routine)
Ojai	United States	Record high minimum temperature	20.0 C (68.0 F)	19 of 100 (Routine)
Paso Robles	United States	Record high minimum temperature	16.7 C (62.1 F)	19 of 100 (Routine)
San Bernardino F S 226	United States	Record high minimum temperature	18.3 C (64.9 F)	19 of 100 (Routine)
Harrisonville	United States	Record high maximum temperature	35.6 C (96.1 F)	19 of 100 (Routine)
Sacramento 5 ESE	United States	Record high maximum temperature	38.9 C (102.0 F)	19 of 100 (Routine)
Fort Macleod	Canada	Record daily precipitation	24.9 mm (1.0 in)	18 of 100 (Routine)
Mandakata	India	Record daily precipitation	64.0 mm (2.5 in)	18 of 100 (Routine)
Healdsburg	United States	Record high minimum temperature	16.1 C (61.0 F)	18 of 100 (Routine)

Counts by Type and Timescale

279 records

Records set or tied on 23 September 1939 by type: Highest daily maximum 130, Lowest daily maximum 4, Highest daily minimum 75, Lowest daily minimum 14, Heaviest daily rainfall 56.

Records on 23 September 1939 by type
Record type	Records
Highest daily maximum	130
Lowest daily maximum	4
Highest daily minimum	75
Lowest daily minimum	14
Heaviest daily rainfall	56
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 23 September 1939 by timescale: all-time 3, monthly 6, daily 270.

How Much Records Were Beaten By

212 broken records

Margins by which the 212 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 50.8. Ties are not counted.

Top 20 by Significance

23 September 1939

Top 20 records on 23 September 1939 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 September 1939	Sierra Madre Henszey, US	monthly rain	121.7 mm (4.8 in)	48.0 mm (1.9 in)	30 years	56 of 100 (Notable)
23 September 1939	Berkeley, US	daily high min	21.7 C (71.1 F)	5.0 C (9.0 F)	41 years	46 of 100 (Notable)
23 September 1939	Oakland, US	daily high min	21.1 C (70.0 F)	6.1 C (11.0 F)	25 years	45 of 100 (Notable)
23 September 1939	San Diego Wbo, US	daily high min	24.4 C (75.9 F)	4.4 C (7.9 F)	55 years	45 of 100 (Notable)
23 September 1939	Rose Isle, AU	daily rain	31.0 mm (1.2 in)	20.8 mm (0.8 in)	32 years	43 of 100 (Notable)
23 September 1939	Santa Barbara, US	daily high max	38.9 C (102.0 F)	8.9 C (16.0 F)	43 years	41 of 100 (Notable)
23 September 1939	Komga (Pol), ZA	daily rain	57.2 mm (2.3 in)	34.6 mm (1.4 in)	12 years	38 of 100 (Notable)
23 September 1939	Bagodar I, IN	daily rain	101.6 mm (4.0 in)	50.8 mm (2.0 in)	16 years	37 of 100 (Notable)
23 September 1939	Chendipada, IN	daily rain	84.6 mm (3.3 in)	48.8 mm (1.9 in)	8 years	35 of 100 (Notable)
23 September 1939	Los Gatos, US	daily high min	22.2 C (72.0 F)	4.4 C (7.9 F)	41 years	33 of 100 (Routine)
23 September 1939	Spreckels Hwy Brg, US	daily high min	20.0 C (68.0 F)	6.7 C (12.1 F)	30 years	33 of 100 (Routine)
23 September 1939	Raiford State Prison, US	daily rain	51.8 mm (2.0 in)	38.8 mm (1.5 in)	24 years	32 of 100 (Routine)
23 September 1939	Santa Maria, US	monthly high min	22.8 C (73.0 F)	2.8 C (5.0 F)	29 years	31 of 100 (Routine)
23 September 1939	Claremont Pomona Clg, US	daily high min	22.2 C (72.0 F)	4.4 C (7.9 F)	41 years	29 of 100 (Routine)
23 September 1939	Folsom, US	daily high min	23.9 C (75.0 F)	5.0 C (9.0 F)	30 years	29 of 100 (Routine)
23 September 1939	Oakland, US	daily high max	36.7 C (98.1 F)	7.3 C (13.1 F)	20 years	29 of 100 (Routine)
23 September 1939	Cairo Ezbekiya, EG	daily high max	38.0 C (100.4 F)	4.0 C (7.2 F)	22 years	28 of 100 (Routine)
23 September 1939	Basirhat, IN	daily rain	67.3 mm (2.6 in)	44.2 mm (1.7 in)	16 years	28 of 100 (Routine)
23 September 1939	Pesaro, IT	daily rain	47.6 mm (1.9 in)	23.1 mm (0.9 in)	10 years	27 of 100 (Routine)
23 September 1939	Hollister 1 SW, US	daily high max	40.6 C (105.1 F)	5.6 C (10.1 F)	41 years	27 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

1793 to 1939

Records set or tied on this calendar date in each year from 1793 to 1939. 1939 had 279 records.

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

Records on 09-23 in each year
Year	Records
1793	1
1796	1
1799	1
1804	1
1832	1
1835	1
1838	1
1842	3
1843	1
1845	2
1848	1
1849	1
1850	1
1851	2
1854	3
1855	1
1859	2
1864	1
1865	1
1866	1
1868	1
1871	1
1872	1
1874	1
1875	1
1876	1
1877	1
1881	4
1882	2
1885	1
1886	1
1887	1
1888	1
1889	3
1890	2
1891	1
1892	2
1893	4
1895	9
1896	5
1897	1
1898	2
1899	4
1900	4
1901	2
1902	6
1903	7
1904	19
1905	6
1906	6
1907	19
1908	19
1909	15
1910	8
1911	11
1912	15
1913	22
1914	29
1915	25
1916	324
1917	56
1918	34
1919	40
1920	44
1921	47
1922	34
1923	74
1924	194
1925	223
1926	459
1927	247
1928	382
1929	198
1930	472
1931	600
1932	383
1933	281
1934	361
1935	239
1936	377
1937	557
1938	389
1939	279
1940	374
1941	490
1942	557
1943	322
1944	381
1945	652
1946	623
1947	803
1948	259
1949	496
1950	267
1951	462
1952	432
1953	271
1954	324
1955	852
1956	299
1957	539
1958	641
1959	307
1960	470
1961	670
1962	344
1963	568
1964	322
1965	783
1966	528
1967	341
1968	481
1969	450
1970	1,457
1971	578
1972	461
1973	674
1974	1,543
1975	1,038
1976	463
1977	616
1978	500
1979	586
1980	1,037
1981	717
1982	775
1983	1,744
1984	1,121
1985	924
1986	740
1987	1,077
1988	653
1989	1,376
1990	702
1991	519
1992	976
1993	983
1994	1,140
1995	1,868
1996	809
1997	1,060
1998	1,326
1999	1,207
2000	2,026
2001	790
2002	930
2003	1,243
2004	986
2005	1,207
2006	1,509
2007	1,153
2008	835
2009	1,201
2010	1,360
2011	666
2012	785
2013	573
2014	595
2015	587
2016	774
2017	1,371
2018	693
2019	565
2020	618
2021	602
2022	551
2023	812
2024	499
2025	449
2026	384

Download the Data

Data for records on 1939-09-23: 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	191
10 to 20	6
20 to 30	8
30 to 40	3
40 to 50	3
50 to 60	1